WO2018186470A1 - Monitoring assistance system, monitoring assistance method, and monitoring assistance program - Google Patents

Abstract

A monitoring assistance system according to an embodiment has a temperature acquisition unit, an electric current value acquisition unit, a state prediction unit, and a display control unit. The temperature acquisition unit acquires temperature information from a temperature sensor for measuring the temperature of a transformer. The electric current value acquisition unit acquires an electric current value flowing through the transformer. The state prediction unit predicts a future state of the transformer on the basis of the temperature information acquired by the temperature acquisition unit and the electric current value acquired by the electric current value acquisition unit. On the basis of the future state of the transformer predicted by the state prediction unit, the display control unit generates information for displaying, on a display unit, at least one from among an electric current value that can be supplied to the transformer and a continuation-possible time that lasts until the temperature of the transformer reaches a permissible limit.

Description

Monitoring support system, monitoring support method, and monitoring support program

Embodiments described herein relate generally to a monitoring support system, a monitoring support method, and a monitoring support program.

In conventional power transmission / transformation equipment in the electric power system, in order to operate the equipment at a limit value that is thermally acceptable or less, the output control of the generator or the like is controlled or the equipment is enhanced. In conventional transmission and substation equipment, equipment temperature, outside air temperature, electric quantity information of power transmission equipment, and the like are acquired, and control is performed based on a predicted increase in equipment temperature in the current equipment usage state. However, in the conventional technology, the facility temperature and the outside temperature are set to values that do not exceed a predetermined temperature under the severe outside temperature in summer or winter, or the equivalent ambient temperature throughout the year. For this reason, transmission and substation facilities are often operated in a state where the temperature difference is larger than the actual facility operating temperature, and even if information based on the above operation is displayed on the display unit, There was a case where operation suitable for the situation could not be performed.

Japanese Unexamined Patent Publication No. Sho 63-314128 Japanese Unexamined Patent Publication No. 5-292651 Japanese Unexamined Patent Publication No. 7-222345

The problem to be solved by the present invention is to provide a monitoring support system, a monitoring support method, and a monitoring support program that can provide information for efficiently utilizing the facility capacity of transmission and transformation equipment.

The monitoring support system of the embodiment includes a temperature acquisition unit, a current value acquisition unit, a state prediction unit, and a display control unit. The temperature acquisition unit acquires temperature information from a temperature sensor that measures the temperature of the transformer. The current value acquisition unit acquires a current value flowing through the transformer. The state prediction unit predicts a future state of the transformer based on the temperature information acquired by the temperature acquisition unit and the current value acquired by the current value acquisition unit. The display control unit can continue until the current value that can be supplied to the transformer or the temperature of the transformer reaches an allowable limit based on the future state of the transformer predicted by the state prediction unit. Information for displaying at least one of the times on the display unit is generated.

1 is a diagram illustrating an example of a monitoring support system 100 according to a first embodiment. The figure for demonstrating the production | generation of the continuation possible time using oil temperature predicted value. The figure for demonstrating the production | generation of the continuation possible time using a lifetime loss estimated value. The figure for demonstrating the operation assistance information display screen 221 displayed on the display part 220 of 1st Embodiment. The flowchart which shows an example of the flow of the process in the monitoring assistance system 100 of 1st Embodiment. The figure which shows an example of the monitoring assistance system 100A of 2nd Embodiment. The figure for demonstrating the operation assistance information display screen 222 displayed on the display part 220 of 2nd Embodiment. The figure which shows an example of the monitoring assistance system 100B of 3rd Embodiment. The figure for demonstrating the example of selection of the operation support information by the calculation result using oil temperature and winding temperature. The flowchart which shows an example of the flow of the process in the monitoring assistance system 100 of 3rd Embodiment. The figure which shows an example of the monitoring assistance system 100C of 4th Embodiment. The figure for demonstrating the control information produced | generated based on the oil temperature estimated value calculated in the prediction calculating part 121. FIG. The figure for demonstrating the operation assistance information display screen 223 displayed on the display part 220 of 4th Embodiment. The flowchart which shows an example of the flow of a process in the monitoring assistance system 100C of 4th Embodiment. The figure which shows an example of the monitoring assistance system 100D of 5th Embodiment. The figure for demonstrating the operation assistance information display screen 224 displayed on the display part 220 of 5th Embodiment. The flowchart which shows an example of the flow of a process in the monitoring assistance system 100D of 5th Embodiment. The figure which shows an example of the monitoring assistance system 100E of 6th Embodiment.

Hereinafter, a monitoring support system, a monitoring support method, and a monitoring support program according to embodiments will be described with reference to the drawings.

(First embodiment)
[overall structure]
FIG. 1 is a diagram illustrating an example of a monitoring support system 100 according to the first embodiment. The monitoring support system 100 illustrated in FIG. 1 is connected to the transformer 10, the temperature sensor 20, and the display device 200.

The transformer 10 includes, for example, an iron core serving as a magnetic flux path and two or more windings serving as a current path interlinking with the magnetic flux. The iron core and the two or more windings are installed so as not to change their positions relative to each other. Further, the iron core and the two or more windings are accommodated in a container filled with insulating oil for increasing the insulation strength and the cooling effect, for example. The insulating oil is, for example, silicone oil or mineral oil. The transformer 10 receives AC power from the outside, transforms voltage and current by electromagnetic induction, and supplies AC power to the outside. Moreover, the transformer 10 is provided with the current sensor 12, for example. The current sensor 12 measures the value of current flowing through the winding of the transformer 10.

Further, the transformer 10 includes, for example, a plurality of taps (not shown) for adjusting the output voltage attached to the windings, and a tap switching control unit (not shown) for switching the taps. The tap switching control unit adjusts the transformation ratio by switching the conductive state of the plurality of taps according to the received voltage and changing the number of turns of the winding.

The temperature sensor 20 is installed in, for example, one or a plurality of inside and / or outside of the transformer 10 and measures the temperature of the transformer 10. The temperature sensor 20 installed inside the transformer 10 measures, for example, the temperature of the insulating oil (hereinafter referred to as “oil temperature”). The temperature sensor 20 installed outside the transformer 10 measures, for example, the temperature around the transformer 10 (hereinafter referred to as “outside air temperature”). For example, the temperature sensor 20 acquires, as sensor information, information related to the electrical resistivity proportional to the temperature obtained by the resistance temperature detector. The temperature sensor 20 outputs sensor information related to the oil temperature and the outside air temperature to the monitoring support system 100 in association with the measurement time.

The monitoring support system 100 includes, for example, an acquisition unit 110, a state prediction unit 120, a display control unit 130, and a communication unit 140. These mechanisms are software function units that function when a processor such as a CPU (Central Processing Unit) executes a program stored in the memory of the monitoring support system 100, for example. The program may be installed in the memory of the monitoring support system 100 by attaching a portable storage medium storing the program to a drive device (not shown). Also, some or all of the functional units of the monitoring support system 100 may be realized by hardware such as LSI (Large Scale Integration), ASIC (Application Specific Integrated Circuit), or FPGA (Field-Programmable Gate Array). Good.

The acquisition unit 110 includes, for example, a sensor information acquisition unit 111, a temperature acquisition unit 112, and a current value acquisition unit 113. The sensor information acquisition unit 111 is an example of a “sensor interface”. The sensor information acquisition unit 111 acquires sensor information measured by the temperature sensor 20.

The temperature acquisition unit 112 converts the sensor information acquired by the sensor information acquisition unit 111 into a temperature value that can be calculated by the state prediction unit 120. Further, the temperature acquisition unit 112 may include, for example, an AD converter that changes an analog signal to a digital signal when the temperature sensor 20 performs an analog output.

The current value acquisition unit 113 acquires the current value measured by the current sensor 12 provided in the transformer 10. The measurement time by the current sensor 12 is associated with the measurement time by the temperature sensor 20, for example.

The state prediction unit 120 predicts the future state of the transformer 10 based on the temperature value acquired by the temperature acquisition unit 112 and the current value acquired by the current value acquisition unit 113, for example. The state prediction unit 120 includes, for example, a prediction calculation unit 121 and an operation support information generation unit 122. The prediction calculation unit 121 is, for example, based on the temperature information acquired by the temperature acquisition unit 112 and the current value acquired by the current value acquisition unit 113, the predicted oil temperature of the transformer 10 for each time t, At least one value is calculated from the predicted line temperature value or the predicted life loss value. Details of the function of the prediction calculation unit 121 will be described later.

The operation support information generation unit 122 includes measurement information such as the current value acquired by the current value acquisition unit 113 and the temperature acquired by the temperature acquisition unit 112, the prediction calculation result calculated by the prediction calculation unit 121, and the thermal Based on the allowable limit, the operation support information 123 is generated. The thermal allowable limit is, for example, a limit value (for example, a temperature limit value) that allows the transformer 10 to thermally allow facility operation.

The operation support information 123 includes, for example, a current value, a temperature, a continuous allowable current value, a time limit allowable current value, and a continuable time. The temperature is the outside air temperature, the oil temperature of the transformer 10, or the winding temperature. The continuous allowable current value is, for example, the maximum current value that can be passed to the facility without exceeding the thermal allowable limit. Further, the time limit allowable current value is the maximum current value that can be passed to the facility without exceeding the thermal allowable limit within a predetermined time. The continuable time is, for example, the time until the temperature of the transformer 10 reaches the thermal allowable limit when it is assumed that the operation is continued while maintaining the current current value.

The display control unit 130 generates information to be displayed on the display unit 220 of the display device 200 based on the operation support information 123 generated by the operation support information generation unit 122. The information to be displayed on the display unit 220 may be, for example, image information or an HTML (Hyper Text Markup Language) file that can be displayed on the browser.

The communication unit 140 communicates with the communication unit 210 of the display device 200. The communication unit 140 transmits information generated by the display control unit 130 to the communication unit 210.

The display device 200 includes a communication unit 210 and a display unit 220, for example. The display device 200 is, for example, a PC (Personal Computer), but may be a tablet terminal, a smartphone, or the like. The communication unit 210 communicates with the communication unit 140 of the monitoring support system 100. The communication unit 210 acquires information to be displayed on the display unit 220 from the communication unit 140.

The display unit 220 is, for example, an LCD (Liquid Crystal Display) or an organic EL (Electro Luminescence) display device. The display unit 220 displays the information received by the communication unit 210 on the screen. An example of information displayed on the display unit 220 will be described later.

[State prediction]
Here, the state prediction process by the state prediction unit 120 described above will be described. The prediction calculation unit 121 calculates the oil temperature, winding temperature, or life loss of the transformer 10 at time t.

For example, the prediction calculation unit 121 uses the outside air temperature θ _a [° C.] and the oil temperature initial value θ _OS [° C.] acquired by the temperature acquisition unit 112 and the current in the transformer 10 acquired by the current value acquisition unit 113. The value I is applied to (Equation 1) to calculate the calculated oil temperature θ _ot (t) of the transformer 10 at time t. When each of the outside air temperature θ _a [° C.] or the oil temperature initial value θ _OS [° C.] is acquired from the plurality of temperature sensors 20, for example, an average value of temperatures measured by the respective temperature sensors, Or the value acquired from the temperature sensor 20 designated beforehand is used.

In (Formula 1), τ0 represents a time constant of oil temperature change. Further, θ _OL indicates the oil temperature final reached temperature [° C.], and is calculated by, for example, (Expression 2).

In (Expression 2), θ ₀ indicates the maximum oil temperature increase value [K], and is calculated by, for example, (Expression 3).

In (Equation 3), θ _ON represents the maximum oil temperature rise value [k] at the rated load, and K represents the load factor of the transformer 10 (= current current value I [A] / current value IN at the rated load). [A]), R represents a loss ratio (= load loss at rated load / no-load loss), and m represents a constant determined by the cooling method. Accordingly, the prediction calculation unit 121 performs the above calculation for different times t using the outside air temperature and current value in the current transformer usage state, thereby calculating the oil temperature calculation values θ _Ot at a plurality of future times. The future oil temperature of the transformer 10 can be predicted by calculating (t).

In addition, when performing a calculation for predicting a future value of the winding temperature, the prediction calculation unit 121 calculates the winding temperature [° C.] at a plurality of future points in time using, for example, (Equation 4).

In (Equation 4), θg represents the winding temperature rise value [K].

In addition, the prediction calculation unit 121 may calculate a life loss prediction value. The life loss is mainly affected by the winding temperature θ _gt (t). For example, assuming that the winding temperature is continuously operated at 95 ° C., the transformer 10 can be expected to have a life of about 30 years. On the other hand, when it is assumed that the winding temperature is continuously operated in a state of 6 [° C.] higher than 95 [° C.], the life of the transformer 10 is assumed to be halved. If it is operated at a winding temperature of 149 ° C., it indicates that the life is shortened by 3% in about 30 minutes. This indicates that the equipment is contracted for about 10 days in a year. Further, when it is assumed that the winding temperature is continuously operated in a state of 6 [° C.] lower than 95 [° C.], it is assumed that the life of the transformer 10 is doubled. Therefore, the prediction calculation unit 121 can calculate the life loss [minute / year] using (Formula 5).

In (Formula 5), b represents a life loss coefficient. For example, assuming that the life is halved every time the winding temperature rises by 6 ° C., the life loss coefficient is (ln2) /6=0.155. In (Expression 5), T1 indicates the start time of the monitoring period, and T2 indicates the end time of the monitoring period. Therefore, the life loss predicted value V can be obtained as a cumulative value of life loss.

The operation support information generation unit 122 generates operation support information 123 using at least one of the predicted oil temperature value, winding temperature prediction value, and life loss prediction value predicted by the prediction calculation unit 121. .

FIG. 2 is a diagram for explaining the generation of the continuable time using the predicted oil temperature value. In the example of FIG. 2, the horizontal axis indicates time, and the vertical axis indicates oil temperature. In the example of FIG. 2, the predicted oil temperature for each time t is shown. For example, the operation support information generation unit 122 refers to the prediction result (at a plurality of points in time) of the calculated oil temperature value θ _ot (t), and acquires the time at which the predicted oil temperature value reaches the determination threshold value of the allowable thermal limit. . For example, the determination threshold value may be a fixed value, or may be a value that is arbitrarily changed depending on an operation status, an operator, or the like. In addition, the operation support information generation unit 122 calculates the time from the current time to the time to reach the determination threshold, and sets the calculated time as the continuable time.

In the example of FIG. 2, the predicted oil temperature value reaches the determination threshold value of the allowable thermal limit at time t1. Therefore, the operation support information generation unit 122 generates the time (t1-t0) from the current time t0 to the time t1 as the continuable time.

Further, for example, the prediction calculation unit 121 assigns a plurality of virtual current values to the current value I in the transformer 10 acquired by the current value acquisition unit 113, and performs calculations of (Expression 1) to (Expression 3). Do. Then, the operation support information generation unit 122 continuously allows the maximum value of the virtual current that does not exceed the determination threshold value of the thermal allowable limit value among the results calculated by substituting a plurality of virtual current values. Generated as a current value.

In addition, the prediction calculation unit 121 performs, for example, calculations (Equation 1) to (Equation 3) into which a plurality of virtual current values are substituted within a predetermined time (for example, 1 hour from the current time). Then, the operation support information generation unit 122 calculates the maximum value of the current that the predicted oil temperature does not exceed the determination threshold value of the thermal allowable limit value within a predetermined time among the calculation results based on the plurality of virtual current values. Generate as a value.

In addition, the future temperature predicted value (winding temperature predicted value) with respect to the winding temperature is the same as the predicted oil temperature shown in FIG. Therefore, similarly to the oil temperature, the state prediction unit 120 sets a determination threshold value for the thermal tolerance limit corresponding to the winding temperature, and the winding temperature is determined based on the set determination threshold value and the predicted winding temperature value. Based on the above, at least one value is generated among the continuous time, continuous allowable current value, and time limit allowable current value.

Further, the state predicting unit 120 may generate each of the above-described continuable time, continuous allowable current value, and time limit allowable current value based on the life loss predicted value. FIG. 3 is a diagram for explaining generation of a continuable time using a predicted life loss value. In the example of FIG. 3, the horizontal axis indicates time, the vertical axis indicates the winding temperature (vertical axis on the left side in FIG. 3), and the life loss (vertical axis on the right side in FIG. 3).

The life loss is predicted based on the elapsed time after the temperature of the winding temperature exceeds a predetermined value (for example, 95 ° C.) and the amount of increase from the predetermined value of the winding temperature. The prediction computation unit 121 performs computation in (Equation 5) using T1 as the time when the winding temperature exceeds a predetermined value and T2 as the current time. Further, the prediction calculation unit 121 ends the calculation when the winding temperature falls below a predetermined value. Note that the prediction calculation unit 121 may provide hysteresis to prevent hunting.

In the example of FIG. 3, the operation support information generation unit 122 acquires time t <b> 2 when the predicted life loss value calculated by the prediction calculation unit 121 exceeds the lifetime loss determination threshold. Then, the operation support information generation unit 122 calculates the time from the acquired time t0 to time t2, and generates the calculated time (t2-t0) as a continuable time.

Further, the prediction calculation unit 121 assigns a plurality of virtual current values to the current value I in the transformer 10 acquired by the current value acquisition unit 113, and performs the above-described calculations of (Expression 1) to (Expression 5). Do. Then, the operation support information generation unit 122 substitutes a plurality of virtual current values and calculates the maximum value of the current that does not exceed the lifetime loss determination threshold as the continuous allowable current value. Generate. Further, the prediction calculation unit 121 performs the calculations of (Expression 1) to (Expression 5) into which a plurality of virtual current values are substituted within a predetermined time range, and the lifetime loss predicted value does not exceed the lifetime loss determination threshold. The maximum value of the current is generated as the time limit allowable current value. The state predicting unit 120 predicts information related to the life loss, so that the operator can grasp the state of the equipment due to overload from the viewpoint of the life, and when the priority order of the operating equipment is determined or systematically Can be used as a guideline for renewing equipment.

[Display screen]
Next, an example of a screen displayed on the display unit 220 in the first embodiment will be described. FIG. 4 is a diagram for explaining the operation support information display screen 221 displayed on the display unit 220 according to the first embodiment. The operation support information display screen 221 shows, for example, a constant operation information display area 221a, a measurement data display area 221b, and an operation summary information display area 221c.

The continuous operation information display area 221a shows the continuous allowable current value generated by the operation support information generation unit 122 and the continuation possible time.

In the measurement data display area 221b, the outside air temperature measurement value and the oil temperature measurement value of the transformer 10 acquired by the temperature acquisition unit 112, the current value acquired by the current value acquisition unit 113, and the prediction calculation unit 121 calculate The calculated winding temperature and oil temperature at the current time are shown. In the outside air temperature measurement value, for example, the value of the outside air temperature measured by two temperature sensors for measuring the outside air temperature (for example, thermometers 1 and 2) is shown. The oil temperature measurement value indicates the oil temperature value respectively measured by three temperature sensors for oil temperature measurement (for example, the first phase to the third phase).

In the operation summary information display area 221c, part or all of the information displayed in the always-on operation information display area 221a and the measurement data display area 221b is shown. The operation support information display screen 221 may display the power value [MW] in addition to (or instead of) the current value.

In the example of FIG. 4, information based mainly on the oil temperature is shown, but information based on the winding temperature or life loss may be displayed instead of the oil temperature. For example, when displaying a value based on the life loss, the display control unit 130 generates information for causing the display unit 220 to display a value obtained by accumulating how much of the 30-year life has been consumed so far. To do. Regarding the information based on which of oil temperature, winding temperature, and life loss elements, the operator may select at least one element to be displayed on the screen, and the monitoring support system At least one element to be displayed in advance in 100 may be set.

The operation support information display screen 221 may display “within continuous value” when the current value flowing through the winding of the transformer 10 in the current operation state is within the continuous allowable current value. When the continuous allowable current value is exceeded, “exceeding limit value” may be displayed. Such display information is also generated by the display control unit 130.

By referring to the operation support information display screen 221, the operator can grasp the allowable current value and the operation continuation time obtained from the constantly changing system state and outside air temperature, and can be operated in accordance with the current facility state. It can be performed.

FIG. 5 is a flowchart illustrating an example of a process flow in the monitoring support system 100 according to the first embodiment. In addition, the process shown in FIG. 5 shows the production | generation process of the operation assistance information based on an oil temperature estimated value as an example. Further, the flowchart shown in FIG. 5 is repeatedly executed at a predetermined timing.

5, first, the temperature acquisition unit 112 acquires temperature information of the transformer 10 from the temperature sensor 20 (step S100). Next, the current value acquisition unit 113 acquires a current value flowing in the winding of the transformer 10 from the current sensor 12 installed in the transformer 10 (step S110). Next, the prediction calculation unit 121 calculates a predicted oil temperature value for each time t of the transformer 10 based on the outside air temperature, the oil temperature, and the current value (step S120).

Next, the operation support information generation unit 122 generates a continuable time based on the calculated oil temperature predicted value and the determination threshold value of the thermal allowable limit (step S130). Next, an oil temperature prediction value for each time t is calculated using a plurality of virtual current values instead of the current value acquired by the prediction calculation unit from the current sensor (step S140). Next, the operation support information generation unit 122 generates a continuous allowable current value or a time limit allowable current value based on the calculated oil temperature predicted value and the determination threshold value of the thermal allowable limit (step S150). Note that the operation support information generation unit 122 may generate both the continuous allowable current value and the time limit allowable current value.

Next, the operation support information generation unit 122 generates the operation support information 123 based on the actually measured temperature or current value or the value calculated by the prediction calculation unit 121 (step S160). Next, the display control unit 130 generates an image for displaying the operation support information 123 on the display unit 220 of the display device 200 (step S170), and outputs the generated image to the display device 200 (step S180). Then, the process of this flowchart ends. Thereby, the display device 200 can receive the information transmitted by the monitoring support system 100 and display the information on the display unit 220.

Note that the monitoring support system 100 may be able to communicate with a plurality of display devices 200. In this case, the monitoring support system 100 transmits information for displaying the operation support information 123 to the plurality of display devices 200. The monitoring support system 100 may have the function of the display unit 220.

As described above, according to the monitoring support system 100 of the first embodiment, it can be supplied to the transformer 10 based on the future state of the transformer 10 predicted by the actually measured temperature information and current value. Information for efficiently utilizing the facility capacity of the power transmission / transformation equipment by causing the display unit 220 to display at least one of the current value or the continuable time until the temperature of the transformer reaches the allowable limit. Can be provided. As a result, the monitoring support system 100 can display the allowable current value obtained from the system state and the outside air temperature that changes with the passage of time on the display device 200, and the operator can generate power before the limit temperature is exceeded. Output adjustment and system switching can be performed.

In addition, the monitoring support system 100 can provide the allowable value of the facility itself as the continuous allowable current value, and can display the temporary allowable value as the time limit allowable current value on the display unit 220. Even if the capacity is exceeded, the operable range can be displayed in detail. Therefore, the operator can operate in accordance with the current equipment state using the continuous allowable current value or the time limit allowable current value displayed on the display device 200 as a guideline. In addition, the monitoring support system 100 can cause the display device 200 to display an operation continuation time until the control target device related to the transformer 10 is controlled. Therefore, the operator can grasp the time margin of the operation of the equipment and can efficiently use the equipment.

(Second Embodiment)
Next, a second embodiment of the monitoring support system will be described. In the following, the same name and reference numeral are used for the configuration having the same function as that of the first embodiment, and a specific description thereof is omitted.

FIG. 6 is a diagram illustrating an example of the monitoring support system 100A according to the second embodiment. The monitoring support system 100A includes an acquisition unit 110, a state prediction unit 120A, a display control unit 130, and a communication unit 140. In the following description, the configuration of the state prediction unit 120A, which is the difference from the first embodiment, will be mainly described.

For example, as the current value flowing through the winding temperature of the transformer 10 is larger, the time until the predicted oil temperature reaches the determination threshold value of the thermal allowable limit becomes shorter, and the current value flowing through the winding temperature of the transformer 10 becomes smaller. The smaller it is, the longer it takes to reach the thermal tolerance limit threshold. For this reason, when generating the time limit allowable current value, it is preferable to generate the time limit allowable current value based on a plurality of times. Therefore, the operation support information generation unit 122A acquires a virtual current value when reaching the determination threshold of the thermal allowable limit for each of a plurality of elapsed times (Tx) from the result calculated by the prediction calculation unit 121, The acquired virtual current value is generated as a time limit allowable current value. The plurality of elapsed times are, for example, 30 minutes, 1 hour, 2 hours, 4 hours, and 8 hours.

The operation support information generation unit 122A also includes operation support information 123A including at least one of a current value, a temperature, a continuous allowable current value, a time limit allowable current value after a plurality of times, and a continuable time. Is generated. The display control unit 130 generates information for displaying the operation support information 123A generated by the operation support information generation unit 122A on the display unit 220.

FIG. 7 is a diagram for explaining the operation support information display screen 222 displayed on the display unit 220 according to the second embodiment. The operation support information display screen 222 shows, for example, a constant operation information display area 222a, a measurement data display area 222b, and an operation summary information display area 222c. The contents displayed in the measurement data display area 222b and the operation summary information display area 222c are the same as the measurement data display area 221b and the operation summary information display area 221c of the operation support information display screen 221 described above. Omitted.

In the continuous operation information display area 222a, the continuous allowable current value generated by the operation support information generating unit 122A, the continuable time, and the time limit allowable current value after a plurality of times are shown. The operator can grasp allowable current values for a plurality of elapsed times from the current time by referring to the operation support information display screen 222.

Regarding the flow of processing in the monitoring support system 100A of the second embodiment, among the processing of steps S100 to S180 in the monitoring support system 100 of the first embodiment, the processing other than the processing of step S150 is similar. I do. In the process of step S150, when the time limit allowable current value is generated, the time limit allowable current value for each of a plurality of times is generated.

As described above, according to the monitoring support system 100A of the second embodiment, in addition to the same effects as those of the first embodiment, the allowable current values for a plurality of elapsed times based on the current time are displayed on the display unit. Therefore, the operator can adjust the current value in accordance with the time required for operation. Therefore, the operator can utilize the facility capacity of the transmission / transformation facility more efficiently.

(Third embodiment)
Next, a third embodiment of the monitoring support system will be described. In the third embodiment, a system configuration similar to that of the monitoring support system of the first embodiment described above can be applied.

FIG. 8 is a diagram illustrating an example of the monitoring support system 100B according to the third embodiment. The monitoring support system 100B includes an acquisition unit 110, a state prediction unit 120B, a display control unit 130, and a communication unit 140. Compared with the monitoring support system 100A according to the second embodiment, the monitoring support system 100B uses a prediction calculation unit 121B and operation support information in the state prediction unit 120B instead of the prediction calculation unit 121 and the operation support information generation unit 122A. It differs in that it includes the generation unit 122B and a prediction value selection unit 124. Therefore, in the following description, the description mainly focuses on the configuration of the prediction calculation unit 121B, the operation support information generation unit 122B, and the prediction value selection unit 124. This configuration may be added to the second embodiment.

FIG. 9 is a diagram for explaining an example of selecting operation support information based on a calculation result using the oil temperature and the winding temperature. The oil temperature and winding temperature have different relationships as shown in FIG. 9 when the horizontal axis is the transformer load factor [%] and the vertical axis is the outside air temperature [° C.] of the transformer 10. To do. In this case, as shown in FIG. 9, the area is divided into four areas A to D. Region A is a region where both the calculation result of the predicted oil temperature value and the calculation result based on the winding temperature reach the thermal allowable limit. Region B is a region where the calculation result based on the oil temperature reaches the thermal allowable limit earlier than the calculation result based on the winding temperature. The calculation result based on the oil temperature first reaches the thermal allowable limit because the oil temperature increases as the outside air temperature increases. Region C is a region where the calculation result based on the winding temperature reaches the thermal allowable limit before the calculation result based on the oil temperature. The calculation result based on the winding temperature first reaches the thermal allowable limit because the winding temperature increases as the load factor increases. Region D is a region where neither the calculation result based on the oil temperature nor the calculation result based on the winding temperature reaches the limit of the allowable limit. As described above, the time for the predicted value to reach the thermal allowable limit may vary depending on the use state of the equipment. This is true not only for the relationship between the oil temperature and the winding temperature described above, but also for the relationship between the oil temperature or winding temperature of the transformer 10 and the life loss.

Therefore, in the third embodiment, the prediction calculation unit 121B performs a plurality of prediction calculations among the oil temperature prediction, the winding temperature prediction, and the life loss prediction. Further, the predicted value selection unit 124 selects an element (oil temperature, winding temperature, or life loss) for the predicted value that reaches the thermal allowable limit in the shortest time among the plurality of calculation results predicted by the prediction calculation unit 121B. ) Is selected. Based on the element selected by the predicted value selection unit 124, the operation support information generation unit 122B generates operation support information 123B including a continuation time, a continuous allowable current value, a time limit allowable current value, and the like. The display control unit 130 generates information for displaying the operation support information 123B for the value that reaches the thermal allowable limit in the shortest time on the display unit 220.

FIG. 10 is a flowchart illustrating an example of a processing flow in the monitoring support system 100B of the third embodiment. The flowchart shown in FIG. 10 is different from the flowchart shown in FIG. 5 described above in that the processes in steps S120 to S150 are replaced with the processes in steps S121 to S151. Therefore, the following description will mainly focus on the processing of steps S131 to S151.

In the process of FIG. 10, the prediction calculation unit 121B calculates an oil temperature prediction value, a winding temperature prediction value, and a life loss prediction value for each time t based on the outside air temperature, the oil temperature, and the current value (step S121). Next, the operation support information generation unit 122B generates a continuable time based on each of the predicted oil temperature value, the predicted coil temperature value, the predicted life value, and the determination threshold value (step S131). Next, the predicted value selection unit 124 has the element (oil temperature, winding temperature) of the predicted value with the shortest continuation time among the continuation time of the predicted oil temperature value, the predicted winding temperature value, and the predicted life value. Or life loss) is selected (step S132).

Next, the prediction calculation unit 121B calculates a predicted value at each time t for the selected element using a plurality of virtual current values instead of the current values (step S141). Next, the operation support information generation unit 122B generates a continuous allowable current value or a time limit allowable current value based on the calculated predicted value and the determination threshold value (step S151), and executes the processes after step S160.

As described above, according to the monitoring support system 100B of the third embodiment, in addition to the same effects as those of the first and second embodiments, a plurality of oil temperatures, winding temperatures, and life losses can be obtained. It is possible to perform control in consideration of the thermal tolerance limit of the elements. Therefore, the monitoring support system 100 can realize safer facility operation.

(Fourth embodiment)
Next, a fourth embodiment of the monitoring support system will be described. In the following, the same name and reference numeral are used for the configuration having the same function as that of the second embodiment, and a specific description thereof is omitted.

FIG. 11 is a diagram illustrating an example of a monitoring support system 100C according to the fourth embodiment. The monitoring support system 100C includes the transformer 10, the temperature sensor 20, the monitoring support system 100C, and the display device 200. The monitoring support system 100C is different from the monitoring support system 100A of the second embodiment in that an operation support information generation unit 122C is provided instead of the operation support information generation unit 122A. Therefore, in the following description, the configuration of the operation support information generation unit 122C will be mainly described. This configuration may be added to the first or third embodiment.

The operation support information generation unit 122C includes, for example, control information for the control target device related to the transformer 10 in addition to the current value, temperature, continuous allowable current value, time limit allowable current value, and continuous duration time. Operation support information 123B including at least one is generated from the information. The control target device related to the transformer 10 is, for example, a generator in the facility, other load system, or a terminal device used by an operator, but may be the transformer 10 itself. The control information is, for example, alarm information, suppression command, cutoff command, control information output time for the control target device, and remaining time from the current time until control information is output.

FIG. 12 is a diagram for describing the control information generated based on the predicted oil temperature value calculated by the prediction calculation unit 121. The example of FIG. 12 shows the predicted oil temperature value over time as in FIG. The operation support information generation unit 122C generates control information for the control target device related to the transformer 10 based on the predicted oil temperature value and the determination threshold value of the thermal allowable limit.

In the example of FIG. 12, the operation support information generation unit 122C generates a control signal for shutting down the generator at time t1 when the predicted oil temperature reaches the determination threshold value of the allowable thermal limit. In addition, the operation support information generation unit 122C generates a control signal for outputting a pre-shutdown alarm for shutting off the generator at a time ta that is a predetermined time (Ta1) before the time t1. In addition to the above contents, the control signal may include a control signal for suppressing the generator, a warning signal before outputting the suppression signal, a control signal for shutting off the transformer 10, and the like.

Also, the operation support information generation unit 122C may calculate the time from the current time until each control signal is output. In addition, the operation support information generation unit 122C may generate a continuous allowable current value, a time limit current value, and a continuable time after it is assumed that a control signal is output.

The display control unit 130 generates information for displaying the operation support information 123C on the display unit 220, and outputs the generated information to the display device 200. Thereby, the operator can grasp | ascertain the time limit until control information is output as information according to the present installation state.

FIG. 13 is a diagram for explaining the operation support information display screen 223 displayed on the display unit 220 according to the fourth embodiment. The operation support information display screen 223 includes, for example, a constant operation information display area 223a, a measurement data display area 223b, an operation summary information display area 223c, an emergency operation information display area 223d, and an emergency operation status display area 223e. It is shown. The contents shown in the normal operation information display area 223a, the measurement data display area 223b, and the operation summary information display area 223c are stored in the above-described normal operation information display area 222a, measurement data display area 222b, and operation summary information display area 222c. Since the contents are the same as those shown, specific explanations are omitted.

In the emergency operation information display area 223d, for example, time limit allowable current values for a plurality of elapsed times are shown in an emergency when it is assumed that a suppression signal or a cut-off signal for the generator is output. In the emergency operation status display area 223e, information on the emergency operation status of the monitoring support system 100C based on the current time is shown. The information on the emergency operation status is, for example, the remaining time until the generator suppression signal is output, the remaining time until the generator cutoff signal is output, and the remaining time until the transformer cutoff signal is output. . In the example of FIG. 13, since the emergency operation is not performed, characters “No emergency operation” are displayed in the emergency operation status display area 223e.

FIG. 14 is a flowchart illustrating an example of a processing flow in the monitoring support system 100C of the fourth embodiment. The flowchart shown in FIG. 14 is different from the flowchart shown in FIG. 5 described above in that the process of step S152 is added. Therefore, the following description will mainly focus on the processing in step S152.

In the process of FIG. 14, the operation support information generation unit 122C generates a continuous allowable current value or a time-limit allowable current value based on the predicted oil temperature value and the determination threshold value of the thermal allowable limit (step S150). Next, the operation support information generation unit 122C generates control information for the control target device related to the transformer 10 (step S152). In addition, the operation support information generation unit 122C generates operation support information including a continuable time, a continuous allowable current value or a time limit allowable current value, and control information (step S160), and executes the processing after step S170.

As described above, according to the monitoring support system 100C of the fourth embodiment, in addition to the same effects as the first to third embodiments, the operator can set the remaining time until the control information is output. It becomes possible to grasp as information according to the current equipment state. Therefore, the monitoring support system 100B can prompt the operator to implement tidal current measures such as system switching before the control information associated with the emergency operation is output.

(Fifth embodiment)
Next, a fifth embodiment of the monitoring support system will be described. In the following description, the same names and symbols are used for configurations having the same functions as those in the fourth embodiment, and a specific description thereof is omitted.

FIG. 15 is a diagram illustrating an example of the monitoring support system 100D of the fifth embodiment. As compared with the monitoring support system 100C of the fourth embodiment, the monitoring support system 100D includes a temperature monitoring unit 114 in the acquisition unit 110D, and an operation support information generation unit 122D instead of the operation support information generation unit 122C. It differs in the point to prepare. Therefore, in the following description, the configuration of the temperature monitoring unit 114 and the operation support information generating unit 122D will be mainly described. Further, this configuration may be added to any of the first to third embodiments.

For example, when the temperature measured by the temperature sensor 20 is abnormal, there is a possibility that the temperature difference between the measured value at the normal time and the actual outside air temperature becomes large. In addition, if the oil temperature predicted value, winding temperature, and life loss predicted value are calculated using abnormal values, the continuous time, continuous allowable current value, and time limit allowable current value are also different from the actual values. Equipment operation is not possible.

Therefore, in the fifth embodiment, the temperature monitoring unit 114 monitors whether the oil temperature or the outside air temperature acquired by the temperature acquisition unit 112 is within a predetermined temperature range, and the oil temperature or the outside air temperature is a predetermined temperature. When it is not within the range, it is determined that the temperature is abnormal, and the temperature information output to the prediction calculation unit 121 is changed. Moreover, when the temperature monitoring part 114 is acquiring the some oil temperature or external temperature with the some temperature sensor 20, when the difference value of each oil temperature or the difference value of external temperature is more than a predetermined threshold value In addition, it may be determined that the temperature is abnormal.

For example, the temperature monitoring unit 114 includes a temperature holding unit 115. The temperature holding unit 115 is realized by, for example, a nonvolatile storage medium such as a flash memory, an HDD (Hard Disk Drive), or an SD card, or a volatile storage medium such as a RAM (Random Access Memory) or a register. The temperature monitoring unit 114 holds the temperature information that was within a predetermined range in the previous measurement in the temperature holding unit 115. Further, the temperature monitoring unit 114 changes the temperature exceeding the temperature range to the temperature information held in the temperature holding unit 115 until a state that is not within the predetermined temperature range reaches a predetermined time. Furthermore, the temperature monitoring unit 114 changes the preset value to a preset value when the temperature acquired by the temperature acquisition unit 112 is not within the predetermined temperature range for a predetermined time or longer. For example, the temperature monitoring unit 114 outputs the temperature after the change and the remaining time until the change to a fixed value to the operation support information generation unit 122D.

Further, the operation support information generating unit 122D can generate operation support information 123D including temperature switching information based on the monitoring result by the temperature monitoring unit 114 in addition to the information included in the operation support information 123C described above. The temperature switching information includes, for example, the result of monitoring whether the oil temperature or the outside air temperature is within a predetermined temperature range, or the previous temperature held when the oil temperature or the outside air temperature is not within the predetermined temperature range. Information, preset fixed temperature information, and the remaining time until the measured temperature is changed to another value are included.

FIG. 16 is a diagram for explaining the operation support information display screen 224 displayed on the display unit 220 according to the fifth embodiment. The operation support information display screen 224 includes, for example, a constant operation information display area 224a, a measurement data display area 224b, an operation summary information display area 224c, an emergency operation information display area 224d, and an emergency operation status display area 224e. It is shown. The contents shown in the display areas other than the measurement data display area 224b are the normal operation information display area 223a, the operation summary information display area 223c, the emergency operation information display area 223d, and the emergency operation status display area shown in FIG. Since the content is the same as that shown in 223e, a detailed description is omitted.

Measured data display area 224b shows an outside air temperature measurement value, an oil temperature measurement value, a current value, a winding temperature calculation value, and an oil temperature calculation value. Here, it is assumed that the temperature monitoring unit 114 determines that one of the temperature sensors 20 for outside air temperature is not within the temperature range. In this case, the previous temperature value 20.0 [° C.] which is the temperature switching information is displayed in the display portion of the outside air temperature measurement value. In the measurement data display area 224b, the remaining time until the temperature information is changed to a fixed value (for example, 25.0 [° C.]) is displayed. Further, when the remaining time until the change to the fixed value becomes 0 (zero), “25.0 ° C. (fixed value)” is displayed in the display portion of the outside air temperature measurement value.

FIG. 17 is a flowchart illustrating an example of a processing flow in the monitoring support system 100D of the fifth embodiment. Note that the flowchart shown in FIG. 17 is different from the flowchart shown in FIG. 5 described above in that steps S101 to S105 are added. Therefore, the following description will mainly focus on the processing of steps S101 to S105.

17, after the process of step S100, the temperature monitoring unit 114 determines whether or not the oil temperature and the outside air temperature acquired by the temperature acquisition unit 112 are within a predetermined temperature range (step S101). If the temperature is within the predetermined temperature range, the temperature monitoring unit 114 causes the temperature holding unit 115 to hold the temperature value assuming that the temperature is normal (step S102).

Further, when the oil temperature and the outside air temperature are not within the predetermined temperature range, the temperature monitoring unit 114 assumes that the acquired temperature value is abnormal, and determines whether or not the temperature value abnormality continues for a predetermined time or more. Determination is made (step S103). When the abnormality of the temperature value has not continued for the predetermined time or longer, the temperature monitoring unit 114 changes the temperature value determined to be abnormal to the temperature held in the temperature holding unit 115 (step S104). If the temperature value abnormality continues for a predetermined time or longer, the temperature monitoring unit 114 changes the temperature value determined to be abnormal to a preset fixed temperature (step S105). Thereafter, the monitoring support system 100D executes the processes after step S110.

In the fifth embodiment, the measured value of the temperature sensor 20 is monitored. However, the current value acquiring unit 113 may be provided with a current value monitoring unit. In this case, the current value monitoring unit monitors whether the current value obtained from the current sensor 12 is abnormal, and performs a process of changing the current value when it is determined that the current value is abnormal.

As described above, according to the monitoring support system 100D of the fifth embodiment, the same effects as those of the first to fourth embodiments can be obtained, and the operator can grasp the abnormality of the temperature sensor 20 at an early stage. Can do. Therefore, the operator can execute load switching on the equipment, equipment maintenance, and the like at an appropriate timing.

(Sixth embodiment)
Next, a sixth embodiment of the monitoring support system will be described. In the following, the same name and reference numeral are used for the configuration having the same function as that of the first embodiment, and a specific description thereof is omitted.

FIG. 18 is a diagram illustrating an example of the monitoring support system 100E according to the sixth embodiment. In this configuration, the monitoring support system 100E is different from the monitoring support system 100 of the first embodiment in that a communication unit 140E is provided instead of the communication unit 140. Therefore, in the following description, the configuration of the communication unit 114E will be mainly described. This configuration may be added to any of the first to fifth embodiments.

The communication unit 140E transmits not only the information to be displayed on the display unit 220 generated by the display control unit 130 but also the operation support information 123 generated by the operation support information generation unit 122 to the display device 200.

The communication unit 210 outputs the operation support information 123 acquired by communication with the communication unit 140E to the display unit 220, and stores the acquired operation support information 123 in association with the time information in the holding unit 230.

The holding unit 230 is realized by, for example, a nonvolatile storage medium such as a flash memory, an HDD, or an SD card, or a volatile storage medium such as a RAM or a register. Also, the holding unit 230 can hold operation support history information by holding the operation support information 123 in association with time information. Therefore, the operator can perform detailed analysis or verification in statistical processing or the like based on the history information.

Regarding the flow of processing in the monitoring support system 100E of the sixth embodiment, among the processing of steps S100 to S180 in the monitoring support system 100 of the first embodiment, the processing other than the processing of step S180 is similar. I do. In the process of step S180, the communication unit 140E not only transmits (outputs) the image generated to display the operation support information 123 on the display unit to the display device 200, but also transmits the operation support information 123 to the display device 200. To do. Thereby, the monitoring support system 100E can not only display the information regarding the operation support information 123 on the display device 200 but also can hold the operation support information 123 in the holding unit 230.

As described above, according to the monitoring support system 100E of the sixth embodiment, in addition to the same effects as those of the first embodiment, only information to be displayed on the display unit 220 is transmitted to the display device 200. Instead, the operation support information 123 is transmitted to the display device 200, so that the user of the display device 200 (for example, an operator or an on-site worker) can verify the validity of the control or estimate the equipment state. It is possible to verify the validity of the parameters used. Note that the first to sixth embodiments described above may be combined with some or all of the other embodiments.

According to at least one embodiment described above, the temperature acquisition unit 112 that acquires temperature information from the temperature sensor 20 that measures the temperature of the transformer 10 and the current value acquisition unit 113 that acquires the current value flowing through the transformer 10. And a state prediction unit 120 that predicts a future state of the transformer 10 based on the temperature information acquired by the temperature acquisition unit 112 and the current value acquired by the current value acquisition unit 113, and the state prediction unit 120 The display unit displays at least one of a current value that can be supplied to the transformer 10 and a continuation time until the temperature of the transformer 10 reaches an allowable limit based on the future state of the transformer 10 predicted by By having the display control unit 130 that generates information to be displayed on 220, it is possible to provide information for efficiently utilizing the facility capacity of the transmission and substation equipment. .

Although several embodiments of the present invention have been described, these embodiments are presented as examples and are not intended to limit the scope of the invention. These embodiments can be implemented in various other forms, and various omissions, replacements, and changes can be made without departing from the spirit of the invention. These embodiments and modifications thereof are included in the scope of the present invention and the gist thereof, and are also included in the invention described in the claims and the equivalent scope thereof.

Claims (9)

1. A temperature acquisition unit that acquires temperature information from a temperature sensor that measures the temperature of the transformer;
   A current value acquisition unit for acquiring a current value flowing through the transformer;
   A state prediction unit that predicts a future state of the transformer based on the temperature information acquired by the temperature acquisition unit and the current value acquired by the current value acquisition unit;
   Based on the future state of the transformer predicted by the state prediction unit, at least a current value that can be supplied to the transformer or a continuation time until the temperature of the transformer reaches an allowable limit, at least A display control unit that generates information for displaying one on the display unit;
   A monitoring support system comprising:
2. The display control unit supplies a continuous permissible current value that can be continuously supplied to the transformer without exceeding a permissible limit, and supplies the transformer without exceeding the permissible limit within a predetermined time. Generating information for displaying at least one of the possible time limit allowable current values on the display unit,
   The monitoring support system according to claim 1.
3. The state predicting unit predicts the time limit allowable current value corresponding to a plurality of elapsed times from the current time.
   The monitoring support system according to claim 2.
4. The state prediction unit predicts a plurality of values among the oil temperature, winding temperature, or life loss of the transformer, and is based on a value that reaches the allowable limit in the shortest time among the predicted values. Generating at least one of a current value that can be supplied to the transformer or the continuable time,
   The monitoring support system according to any one of claims 1 to 3.
5. The display control unit generates information for causing the display unit to display the time until the control target device related to the transformer is controlled when the continuous allowable current value is exceeded. ,
   The monitoring support system according to claim 2 or 3.
6. A temperature monitoring unit that monitors whether the temperature information acquired by the temperature acquisition unit is included in a predetermined temperature range;
   The display control unit displays the remaining time until the temperature information acquired by the temperature acquisition unit is changed when the temperature monitoring unit determines that the temperature information is not included in a predetermined temperature range. Generate information to be displayed on the
   The monitoring support system according to any one of claims 1 to 5.
7. The temperature information acquired by the temperature acquisition unit, the current value acquired by the current value acquisition unit, the current value that can be supplied to the transformer, and the continuous time until the temperature of the transformer exceeds the allowable limit A communication unit that transmits at least one of the devices to the device corresponding to the display unit;
   The monitoring support system according to any one of claims 1 to 6.
8. Computer
   Obtain temperature information from the temperature sensor that measures the temperature of the transformer,
   Obtain the current value flowing through the transformer,
   Predicting the future state of the transformer based on the acquired temperature information and the acquired current value;
   Based on the predicted future state of the transformer, at least one of a current value that can be supplied to the transformer or a continuation time until the temperature of the transformer reaches an allowable limit is displayed on the display unit. Generate information for display,
   Monitoring support method.
9. On the computer,
   Get temperature information from a temperature sensor that measures the temperature of the transformer,
   Obtain the value of the current flowing through the transformer,
   Based on the acquired temperature information and the acquired current value, the future state of the transformer is predicted,
   Based on the predicted future state of the transformer, at least one of a current value that can be supplied to the transformer or a continuation time until the temperature of the transformer reaches an allowable limit is displayed on the display unit. Generate information for display,
   Monitoring support program.

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