CN113126020A - Online monitoring device and system and monitoring method applied to device - Google Patents
Online monitoring device and system and monitoring method applied to device Download PDFInfo
- Publication number
- CN113126020A CN113126020A CN202110502442.6A CN202110502442A CN113126020A CN 113126020 A CN113126020 A CN 113126020A CN 202110502442 A CN202110502442 A CN 202110502442A CN 113126020 A CN113126020 A CN 113126020A
- Authority
- CN
- China
- Prior art keywords
- power consumption
- phase
- total
- electric energy
- disturbance
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Pending
Links
Images
Classifications
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
- G01R35/00—Testing or calibrating of apparatus covered by the other groups of this subclass
- G01R35/04—Testing or calibrating of apparatus covered by the other groups of this subclass of instruments for measuring time integral of power or current
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
- G01R1/00—Details of instruments or arrangements of the types included in groups G01R5/00 - G01R13/00 and G01R31/00
- G01R1/02—General constructional details
- G01R1/04—Housings; Supporting members; Arrangements of terminals
Landscapes
- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- Remote Monitoring And Control Of Power-Distribution Networks (AREA)
Abstract
The utility model relates to an on-line monitoring device, system and be applied to device's monitoring method relates to power network technical field, and it includes monitoring terminal and with three-phase four-wire electric energy meter electric connection and with the disturbance equipment of monitoring terminal communication connection, still includes acquisition terminal, acquisition terminal and monitoring terminal communication connection, wherein, disturbance equipment includes the disturbance load, the disturbance load is established ties in the return circuit of the controllable load of user side, the disturbance equipment can be with disturbance power consumption DeltaY that the disturbance load brought send to monitoring terminal, through the mutual cooperation at monitoring terminal, disturbance equipment and acquisition terminal, can judge whether the measurement of three-phase four-wire electric energy meter is accurate. The application has the effects of convenient monitoring and low cost.
Description
Technical Field
The present application relates to the field of power network technologies, and in particular, to an online monitoring device, an online monitoring system, and a monitoring method applied to the online monitoring device.
Background
At present, whether the electric meters (generally three-phase four-wire electric energy meters) on the distribution line site of a large and medium-sized enterprise are accurate or not cannot be known, and under the general condition, a site calibrator is required to be used for verifying whether the electric meters on the site are accurate or not.
However, in practical situations, the calibrator is bulky, inconvenient to deploy, inconvenient to disassemble after detection, inconvenient to operate in practical use, and incapable of monitoring for a long time. If the electricity meter cannot be monitored regularly, metering inaccuracy occurs due to unexpected factors, and extra charges are caused.
With respect to the related art in the above, the inventors consider that there is a drawback in that it is inconvenient to monitor the on-site electricity meter.
Disclosure of Invention
In order to conveniently detect the electric meter and improve the detection accuracy of the electric meter, the application provides an online monitoring device, an online monitoring system and a monitoring method applied to the online monitoring device.
In a first aspect, the present application provides an online monitoring device, which adopts the following technical scheme:
an on-line monitoring device comprises a monitoring terminal, disturbance equipment and an acquisition terminal, wherein the disturbance equipment is electrically connected with a three-phase four-wire electric energy meter and is in communication connection with the monitoring terminal, the acquisition terminal is in communication connection with the monitoring terminal, the disturbance equipment comprises a disturbance load, the disturbance load is connected in series in a loop of a controllable load at a user terminal, the disturbance equipment can transmit disturbance power consumption delta Y caused by the disturbance load to the monitoring terminal,
the monitoring terminal comprises a monitoring terminal and a monitoring terminal,
the meter reading module is used for reading the total electricity consumption X of the user side measured by the three-phase four-wire electric energy meter;
the metering module is electrically connected with a voltage input end and a current output end of the three-phase four-wire electric energy meter and is used for collecting the actual power consumption X1 of the controllable load of the user end;
the calculation module is used for calculating the total consumption of the actual electricity consumption X1 and the disturbance electricity consumption delta Y and setting the total consumption as Y;
the storage module is used for storing data of actual electricity consumption X1, total electricity consumption X, total consumption Y and disturbance electricity consumption delta Y;
the local communication module is used for realizing local communication among the meter reading module, the disturbance equipment and the three-phase four-wire electric energy meter;
the remote communication module is used for uploading data of actual power consumption X1, total power consumption X, total consumption Y and disturbance power consumption delta Y to the acquisition terminal;
the collection terminal, the data that collection terminal is used for acquireing actual power consumption X1, total power consumption X, total consumption Y and disturbance power consumption DeltaY, collection terminal includes that one-level judges module and second grade judge module, one-level judge module is through comparing actual power consumption X1 and total power consumption X's numerical value size preliminary judgement three-phase four-wire electric energy meter whether measure accurately, second grade judge module is through comparing total consumption Y and total power consumption X's size judge three-phase four-wire electric energy meter whether measure accurately.
Through adopting above-mentioned technical scheme, under actual conditions, just can acquire the size of actual power consumption X1 and total power consumption X through collection terminal, to this, through comparing size between them, the knowing that just can clearly is accurate whether the three-phase four-wire electric energy meter measures, because when two inequalities, then prove that the three-phase four-wire electric energy meter is inaccurate to measure, then probably there is the condition of stealing the electricity. The specific reason is that when an electricity thief leads out an additional power wire at a current output end, the electricity consumption data of the part of the total electricity consumption X accounting amount is obtained, and the data of the part of the total electricity consumption X accounting amount cannot be measured by the actual electricity consumption X1; if no electricity stealing happens or the metering is accurate, the actual electricity consumption X1 is the total electricity consumption X. The disturbance equipment can further judge whether the three-phase four-wire electric energy meter is accurately measured, and particularly, when the total consumption Y is not equal to the total power consumption X plus the disturbance power consumption delta Y, the three-phase four-wire electric energy meter is inaccurate in measurement. The specific reason is the same as explained in the previous paragraph.
Through remote real time monitoring's mode, can effectively reduce manpower, material resources cost, in fact, current check gauge is bulky, inconvenient deployment, and the good back of deployment is dismantled also relatively troublesome, and adopts the monitoring mode of this application, can easily detect whether measurement of three-phase four-wire electric energy meter is accurate to can simplify the monitoring procedure, improve monitoring efficiency, simultaneously, the on-the-spot deployment of also being convenient for. In addition, the online monitoring device is applied to a user side with large power consumption, the better the effect is, the cost can be effectively saved, and the condition of electricity stealing can be found in time.
In a second aspect, the present application provides an online line loss monitoring method, which adopts the following technical scheme:
an online monitoring method comprises the steps of obtaining actual power consumption X1 of a controllable load of a user side, and outputting actual power consumption X1 information to an acquisition terminal;
recording the total power consumption X of a user side measured by the three-phase four-wire electric energy meter, and outputting the information of the total power consumption X to an acquisition terminal;
acquiring the actual power consumption X1 of a controllable load of a user side, and outputting the actual power consumption X1 information to an acquisition terminal;
the acquisition terminal compares the actual power consumption X1 with the total power consumption X to judge whether the measurement of the three-phase four-wire electric energy meter is accurate;
acquiring disturbance power consumption delta Y brought by adding a disturbance load, and outputting the disturbance power consumption delta Y to an acquisition terminal;
calculating the total consumption Y of the actual power consumption X1 and the disturbance power consumption delta Y, and sending data information of the total consumption Y and the total power consumption X to an acquisition terminal;
and the acquisition terminal judges whether the metering of the three-phase four-wire electric energy meter is accurate or not by comparing the total consumption Y with the total power consumption X.
Through adopting above-mentioned technical scheme, through the existence of first comparison signal and second comparison signal, can make things convenient for long-range monitoring whether the measurement of three-phase four-wire electric energy meter is accurate to can improve monitoring efficiency, reduce the risk that takes place to steal the electricity, simultaneously, through the interpolation of disturbance power consumption Y, can further improve investigation efficiency, find out the three-phase four-wire electric energy meter of trouble.
Preferably, the actual power usage X1 and the total power usage X are set to be metered within a predetermined time period.
By adopting the technical scheme, if the preset time period is 24 hours, a better monitoring effect can be achieved by acquiring the actual power consumption X1 and the total power consumption X within 24 hours, because within a short time, the situation that the data measured by the electric meter is inaccurate due to large voltage fluctuation exists.
Optionally, the added disturbance load is used for changing the current phase angle of the user-side controllable load collected in the three-phase four-wire electric energy meter.
By adopting the technical scheme, the total power consumption X measured by the three-phase four-wire electric energy meter can be indirectly changed by changing the current phase angle, specifically, a capacitor can be connected in series at the wire outlet end of one phase of the three-phase four-wire electric energy meter, the capacitive load is equivalently applied due to the addition of the capacitor, and at the moment, the current phase angle of the end is changed. When electricity stealing does not occur, namely the three-phase four-wire electric energy meter is accurately measured, the total electricity consumption X of the three-phase four-wire electric energy meter is equal to the total consumption Y. Through this mode, just can be very light judge that whether three-phase four-wire electric energy meter measures accurately, simultaneously, when both inequalities, can also indirectly judge that this table takes place to steal the condition of electricity.
Optionally, the added disturbance load is used for changing the current of the user-side controllable load collected in the three-phase four-wire electric energy meter.
Through adopting above-mentioned technical scheme, through the size that changes the electric current, also can indirectly change total power consumption X of three-phase four-wire electric energy meter measurement, specifically, can be at the leading-out terminal series resistance of one of them looks of three-phase four-wire electric energy meter, the joining of resistance has been equivalent to having exerted power consumption load, and at this moment, the electric current of this end changes. When electricity stealing does not occur, namely the three-phase four-wire electric energy meter is accurately measured, the total electricity consumption X of the three-phase four-wire electric energy meter is equal to the total consumption Y. Through this mode, just can be very light judge that whether three-phase four-wire electric energy meter measures accurately, simultaneously, when both inequalities, can also indirectly judge that this table takes place to steal the condition of electricity.
In a third aspect, the present application provides a meter box, which adopts the following technical scheme:
the utility model provides a meter box, includes the on-line monitoring device, the on-line monitoring device is coupled with three-phase four-wire electric energy meter, the three-phase four-wire electric energy meter is installed at the incasement, and the side of each three-phase four-wire electric energy meter is all supporting installs the on-line monitoring device.
Through adopting above-mentioned technical scheme, when needs monitor three-phase four-wire electric energy meter, can directly know whether accurate three-phase four-wire electric energy meter through monitoring devices, meanwhile, the mode at the incasement is all installed with monitor terminal to three-phase four-wire electric energy meter, can easy to assemble, and can reach long-term monitoring, real-time supervision's purpose, among the contrast prior art, need additionally adopt the check gauge to judge whether accurate mode of three-phase four-wire electric energy meter, this monitoring mode is simple effective, and low cost, facilitate the use.
In a fourth aspect, the present application provides an online monitoring system, which adopts the following technical scheme:
an online monitoring system comprises an online monitoring device and a general meter arranged on a bus line, wherein the general meter records the total energy before the total energy is distributed to each branch line, and is in communication connection with acquisition terminals on all the branch lines, so that the electric energy consumed by users on each branch line can be acquired.
By adopting the technical scheme, the line loss rate can be calculated by comparing the total energy distributed to each branch line with the electric energy consumed by the user on each branch line, and accordingly, when the line loss rate exceeds the range, the line loss rate can be timely eliminated, and the risk of electricity stealing is reduced.
Optionally, the on-line monitoring system further includes setting total energy of the summary table before being distributed to each branch line as E, and electric energy consumed by the user on each branch line as W, and when the line loss rate Q = | (E-W)/2| is in a range from 1% to 3%, the line loss rate on the branch line is in a reasonable range, otherwise, the line loss power consumption is abnormal.
Through adopting above-mentioned technical scheme, through the calculation of line loss rate, whether can be very convenient the understanding line loss take place unusually, secondly, in case take place unusually, through monitor terminal's clearance, also can find that three-phase four-wire electric energy meter of trouble fast to can effectively improve investigation efficiency.
In summary, the present application includes at least one of the following beneficial technical effects:
1. the size of actual power consumption X1 and total power consumption X just can be obtained through collection terminal to this, through comparing size between them, just can clearly know whether the measurement of three-phase four-wire electric energy meter is accurate, because when two inequalities, then prove that three-phase four-wire electric energy meter measurement is inaccurate, then probably there is the condition of stealing the electricity. The presence of disturbance equipment can further judge whether the three-phase four-wire electric energy meter is accurately measured, and particularly, when the total consumption Y is not equal to the total power consumption X plus the disturbance power consumption delta Y, the measurement of the three-phase four-wire electric energy meter is definitely inaccurate.
2. Through remote real time monitoring's mode, can effectively reduce manpower, material resources cost, in fact, current check gauge is bulky, inconvenient deployment, and the good back of deployment is dismantled also relatively troublesome, and adopts the monitoring mode of this application, can easily detect whether measurement of three-phase four-wire electric energy meter is accurate to can simplify the monitoring procedure, improve monitoring efficiency, simultaneously, the on-the-spot deployment of also being convenient for. In addition, the online monitoring device is applied to a user side with large power consumption, the better the effect is, the cost can be effectively saved, and the condition of electricity stealing can be timely realized.
Drawings
FIG. 1 is a schematic block diagram of an online monitoring device according to one embodiment of the present application;
FIG. 2 is a schematic diagram of modules included in a monitoring terminal according to an embodiment of the present disclosure;
FIG. 3 is a three-phase incoming line outgoing diagram of a three-phase four-wire power meter according to one embodiment of the present application;
FIG. 4 is a schematic diagram of a three-phase four-wire electric energy meter with a C-phase current outlet end being drawn out of a power line according to one embodiment of the present application;
FIG. 5 is a schematic diagram of a monitoring terminal sending measured relevant data to an acquisition terminal according to an embodiment of the present application;
FIG. 6 is a schematic diagram of a three-phase four-wire electric energy meter with a short-circuited A-phase current outlet according to one embodiment of the present application;
FIG. 7 is a schematic diagram of a three-phase four-wire electric energy meter with a disturbance load connected to a phase-A current outlet according to one embodiment of the present application;
FIG. 8 is a schematic flow chart diagram of an online monitoring method according to an embodiment of the present application;
FIG. 9 is a schematic diagram of a summary table and a position of a meter box according to an embodiment of the present application.
Reference numerals: 1. monitoring a terminal; 11. a meter reading module; 12. a metering module; 13. a calculation module; 14. a storage module; 15. a local communication module; 16. a remote communication module; 2. a perturbation device; 21. disturbing the load; 3. collecting a terminal; 4. a meter box; 5. summarizing; 6. the user side can control the load; 7. three-phase four-wire electric energy meter.
Detailed Description
The present application is described in further detail below with reference to figures 1-9.
The embodiment of the application discloses an online monitoring device for real-time remote monitoring whether the measurement of three-phase four-wire electric energy meter 7 is accurate.
Example 1
Referring to fig. 1, the on-line monitoring device includes a monitoring terminal 1, a disturbance device 2 and an acquisition terminal 3, wherein the disturbance device 2 is electrically connected with a three-phase four-wire electric energy meter 7 and is in communication connection with the monitoring terminal 1, and the acquisition terminal 3 is in communication connection with the monitoring terminal 1. The disturbance equipment 2 comprises a disturbance load 21, the disturbance load 21 is connected in series in a loop of the controllable load 6 of the user side, and the disturbance equipment 2 can send disturbance power consumption delta Y brought by the disturbance load 21 to the monitoring terminal 1.
Referring to fig. 2, the monitoring terminal 1 includes a meter reading module 11, a metering module 12, a controller, a local communication module 15 and a remote communication module 16, where the meter reading module 11 is electrically connected to the three-phase four-wire electric energy meter 7 and is configured to read the total power consumption X of the user side metered by the three-phase four-wire electric energy meter 7. The controller comprises a calculation module 13 and a storage module 14, the meter reading module 11 is in communication connection with the three-phase four-wire electric energy meter 7 through a local communication module 15, the local communication module 15 can be a 485 communication network, and meanwhile, the disturbance device 2 is also in communication connection with the monitoring terminal 1 through the local communication module 15. The monitoring terminal 1 is in communication connection with the acquisition terminal 3 through the remote communication module 16, and the remote communication module 16 may be 3G, 4G or 5G, but the remote communication module 16 may be arranged to achieve the effect of remote communication.
Referring to fig. 2 and 3, metering module 12 is electrically connected with three-phase four-wire electric energy meter 7 for gather user controllable load 6's actual power consumption X1, specifically, metering module 12 includes current transformer and voltage acquisition interface, current transformer is electrically connected with A, B, C looks electric current outlet terminal of three-phase four-wire electric energy meter 7, be used for acquireing user's three-phase four-wire electric energy meter 7A, B, C three-phase power consumption electric current data, the voltage acquisition interface is electrically connected with A, B, C looks voltage inlet terminal of three-phase four-wire electric energy meter 7, be used for acquireing user's three-phase four-wire electric energy meter 7A, B, C three-phase voltage data. Note that the specific current, voltage acquisition point locations refer to the locations of the nodes in fig. 3.
Referring to fig. 3 and 4, in general, when the total power consumption X is not equal to the actual power consumption X1, the three-phase four-wire electric energy meter 7 is inaccurate in metering, referring to fig. 4, because when an electricity thief selects one or more additional power lines from the three phases A, B, C, the actual power consumption X1 is not enough to meter the power consumption consumed by the additional power lines, and the three-phase four-wire electric energy meter 7 is not enough to meter the power consumption consumed by the additional power lines, therefore, the total power consumption X metered by the three-phase four-wire electric energy meter 7 is not equal to the actual power consumption X1, and the three-phase four-wire electric energy meter 7 which is inaccurate in metering, even has electricity stealing can be indirectly found out.
The inside one-level judging module that is equipped with of collection terminal 3, one-level judging module is through the numerical value size of comparison actual power consumption X1 with total power consumption X, can output equal or unequal result, to this, can tentatively judge whether three-phase four-wire electric energy meter 7 measures accurately. The numerical value is visually observed through the acquisition terminal 3, a worker does not need to go to check whether the metering of the three-phase four-wire electric energy meter 7 is wrong or not at regular intervals, and the effects of saving time and labor and effectively improving the monitoring efficiency can be achieved. Meanwhile, the purposes of long-term monitoring and real-time monitoring can be achieved.
Referring to fig. 4 and 5, the calculating module 13 is configured to calculate a total consumption of the actual power consumption X1 and the disturbance power consumption Δ Y, and set the total consumption to be Y. The storage module 14 is used for storing data of the actual power consumption X1, the total power consumption X, the total consumption Y and the disturbance power consumption Δ Y. When the total consumption is Y and the total power consumption X are not equal, the metering of the three-phase four-wire electric energy meter 7 is inaccurate, because a power stealing person additionally leads out a power line at a wire outlet end to achieve the purpose of power stealing.
Referring to fig. 4 and 5, the calculation module 13 is capable of indirectly improving the monitoring accuracy, and after the calculation module 13 calculates the total consumption Y, the data information of the total consumption Y and the total power consumption X is sent to the acquisition terminal 3. And the acquisition terminal 3 is internally provided with a secondary judgment module, the secondary judgment module can output equal or unequal results by comparing the total consumption Y and the total power consumption X, and aiming at the result, when the unequal results are output, the metering of the three-phase four-wire electric energy meter 7 can be directly judged to be inaccurate.
Referring to fig. 5 and 6, in general, when the total used amount X is equal to the actual used amount X1, the metering of the three-phase four-wire electric energy meter 7 is accurate. However, in practical situations, there may be exceptions, where the exceptions include that when a phase current output end in the three-phase four-wire electric energy meter 7 is short-circuited, the total electricity consumption X measured by the three-phase four-wire electric energy meter 7 at this time is the sum of the electricity consumptions of the other two phases, and similarly, the value measured by the actual electricity consumption X1 is also the sum of the electricity consumptions of the other two phases, that is, although the actual electricity consumption X1 at this time is equal to the total electricity consumption X, the measurement of the three-phase four-wire electric energy meter 7 is inaccurate because the electricity consumption of the short-circuited phase is not measured.
Referring to fig. 5 and 7, in order to check the situation that the actual power consumption X1 is equal to the total power consumption X, but the three-phase four-wire electric energy meter 7 still measures inaccurately, the disturbance device 2 introduced in the present application can solve the problem, the disturbance device 2 includes a relay, a communication unit and a measurement unit, the relay is used for switching the disturbance load 21 in the loop of the user-side controllable load 6, the disturbance load 21 may specifically be a capacitor, and an external control chip may control the relay to connect the capacitor in series in the loop of the user-side controllable load 6. The communication unit is used for being in communication connection with the monitoring terminal 1. The metering unit is used for metering the electricity consumption brought by the capacitor after the capacitor is put into the metering unit, and the electricity consumption is recorded as disturbance electricity consumption delta Y. After the disturbance electricity consumption quantity delta Y is obtained, the disturbance electricity consumption quantity delta Y is sent to the monitoring terminal 1 through the communication unit. When the capacitor is connected in series in the short-circuited one-phase current output loop, which is equivalent to applying a power consumption load, the power consumption load consumes power, and the consumed power is the disturbance power consumption Δ Y in the embodiment.
Intervention of disturbance power consumption delta Y can be sent to the monitoring terminal 1, the monitoring terminal 1 can calculate the total consumption Y of actual power consumption X1 and disturbance power consumption delta Y, namely, the intervention of the disturbance power consumption delta Y can enable the value of the total consumption Y to be increased, but the total power consumption X of a user side metered by the three-phase four-wire electric energy meter 7 cannot be changed, and therefore, which three-phase four-wire electric energy meter 7 is inaccurate in metering can be found. For the acquisition terminal 3, the monitoring terminal 1 sends all monitored and calculated related data to the acquisition terminal 3, and therefore, the monitoring terminal 1 can know whether the three-phase four-wire electric energy meter 7 is really accurately metered by comparing the total consumption amount Y and the total power consumption amount X.
The implementation principle of the embodiment 1 is as follows: after the data of the actual power consumption X1, the total power consumption X, the total consumption Y and the disturbance power consumption Δ Y are uploaded to the acquisition terminal 3, it can be preliminarily determined whether the three-phase four-wire electric energy meter 7 is accurately measured by comparing the values of the actual power consumption X1 and the total power consumption X, and when the values of the total power consumption X and the actual power consumption X1 are not equal, the three-phase four-wire electric energy meter 7 is inaccurate to measure. Furthermore, in order to verify the accuracy, whether the three-phase four-wire electric energy meter 7 is accurately measured can be judged by comparing the total consumption Y and the total power consumption X, when the total consumption Y is not equal to the total power consumption X, the three-phase four-wire electric energy meter 7 is definitely inaccurate, and when the total consumption Y is equal to the total power consumption X, the measurement of the three-phase four-wire electric energy meter 7 is accurate.
Example 2
The difference from embodiment 1 is that the disturbance load 21 is specifically a resistor, and when the resistor is connected in series in the current output loop of the short-circuited phase, which is equivalent to applying a capacitive load, at this time, the current phase angle at the end changes, and further, the consumed power amount is consumed, and the consumed power amount is the disturbance power amount Δ Y in this embodiment. The intervention of the disturbance power consumption delta Y can increase the value of the total consumption Y, but the total power consumption X of the user side measured by the three-phase four-wire electric energy meter 7 cannot be changed, so that which three-phase four-wire electric energy meter 7 is inaccurate in measurement can be found. For the acquisition terminal 3, the monitoring terminal 1 sends all monitored and calculated related data to the acquisition terminal 3, and therefore, the monitoring terminal 1 can know whether the three-phase four-wire electric energy meter 7 fails or not by comparing the total consumption amount of Y and the total power consumption amount of X.
The implementation principle of the embodiment 2 is as follows: when the three-phase four-wire electric energy meter 7 needs to be further verified to be accurately measured, disturbance electricity consumption delta Y is added, the monitoring terminal 1 can know whether the three-phase four-wire electric energy meter 7 is accurately measured or not by comparing the total consumption Y and the total electricity consumption X, when the total consumption Y and the total electricity consumption X are unequal, the three-phase four-wire electric energy meter 7 is definitely inaccurate, and when the total consumption Y and the total electricity consumption X are equal, the measurement of the three-phase four-wire electric energy meter 7 is accurate.
The embodiment of the application also discloses an online monitoring method. Referring to fig. 8, the online monitoring method is applied to the online monitoring apparatus in embodiment 1, and the online monitoring method includes:
recording the total power consumption X of a user side measured by the three-phase four-wire electric energy meter, and outputting the information of the total power consumption X to an acquisition terminal;
acquiring the actual power consumption X1 of a controllable load of a user side, and outputting the actual power consumption X1 information to an acquisition terminal;
the acquisition terminal compares the actual power consumption X1 with the total power consumption X to judge whether the measurement of the three-phase four-wire electric energy meter is accurate;
the method is judged as a preliminary judgment, when the actual power consumption X1 is different from the total power consumption X, the metering of the three-phase four-wire electric energy meter is inaccurate, and the actual power consumption X1 is equal to the total power consumption X when no metering error occurs or even electricity stealing occurs. However, when the actual power consumption X1 is equal to the total power consumption X, the metering of the three-phase four-wire electric energy meter is not necessarily accurate, and therefore, further verification is required, and the detailed steps are as follows:
acquiring disturbance power consumption delta Y brought by adding a disturbance load, and outputting the disturbance power consumption delta Y to an acquisition terminal;
calculating the total consumption Y of the actual power consumption X1 and the disturbance power consumption delta Y, and sending data information of the total consumption Y and the total power consumption X to an acquisition terminal;
and the acquisition terminal judges whether the metering of the three-phase four-wire electric energy meter is accurate or not by comparing the total consumption Y with the total power consumption X.
When the disturbance load is connected in series at the one-phase current output end which is short-circuited, the total electricity consumption X of the user end which is measured by the three-phase four-wire electric energy meter is inaccurate, because the added disturbance electricity consumption delta Y cannot be measured, but the disturbance electricity consumption delta Y can be sent to the monitoring terminal, and the monitoring terminal can calculate the total consumption Y and send the total consumption Y to the acquisition terminal, therefore, the total consumption Y and the total electricity consumption X are compared through the acquisition terminal, whether the current output end of the three-phase four-wire electric energy meter is short-circuited or not can be judged, and then whether the measurement of the three-phase four-wire electric energy meter is accurate or not can be verified. When the measurement is accurate, the sum of the total electricity consumption X and the disturbance electricity consumption delta Y is equal to the actual electricity consumption X1 and the disturbance electricity consumption delta Y; when the two current output ends are not in alignment, the short circuit of the current output end of one phase or two phases of the three-phase four-wire electric energy meter can be reversely deduced.
In order to improve the accuracy of the data, the online monitoring method further includes that the actual power consumption X1 and the total power consumption X are set to be measured within a preset time period, for example, the preset time period may be 24 hours, the power consumption is more accurate within a longer period, and the inaccurate power consumption data in a short time due to larger voltage fluctuation is avoided.
The adding method of the disturbance load comprises two methods,
one method is to change the magnitude of the current phase angle of the user-side controllable load collected in the three-phase four-wire electric energy meter, for example, a capacitor may be connected in series in the loop of the user-side controllable load, and the addition of the capacitor is equivalent to applying a capacitive load, and at this time, the current phase angle of the end changes, which generates a disturbance power consumption Δ Y and increases the total consumption Y. If the total power consumption X is unchanged and is not equal to the total consumption Y, the three-phase four-wire electric energy meter is proved to have errors in metering, and if the total power consumption X plus the disturbance power consumption delta Y and the total power consumption X plus the disturbance power consumption delta Y is equal to the total consumption Y, the three-phase four-wire electric energy meter is proved to be accurate in metering.
The other method is to change the current of the user-side controllable load collected in the three-phase four-wire electric energy meter, for example, a resistor can be connected in series in a loop of the user-side controllable load, the addition of the resistor is equivalent to the application of a power consumption load, at the moment, the current of the end changes, the disturbance power consumption delta Y is generated, and the total consumption Y is increased. If the total power consumption X is unchanged, the three-phase four-wire electric energy meter is proved to have errors in metering, and if the total power consumption X plus the disturbance power consumption delta Y and the total power consumption X plus the disturbance power consumption delta Y is equal to the total consumption Y, the three-phase four-wire electric energy meter is proved to be accurate in metering.
The implementation principle of the online monitoring method in the embodiment of the application is as follows: the method comprises the steps that an actual power consumption X1 and a total power consumption X are compared through an acquisition terminal, when the actual power consumption X1 and the total power consumption X are different in numerical value, the metering of the three-phase four-wire electric energy meter is inaccurate, disturbance power consumption delta Y is added for further verifying the accuracy of the three-phase four-wire electric energy meter, the total consumption Y and the total power consumption X are compared, and when the total consumption Y and the total power consumption X are different in size, the metering error of the three-phase four-wire electric energy meter is proved.
The embodiment of the application also discloses an online monitoring system. Referring to fig. 9, the online monitoring system includes an online monitoring device, and further includes a total meter 5 installed on the bus line, the total meter 5 records total energy before being distributed to each branch line, the total energy before being distributed to each branch line by the total meter 5 is set to be E, the total meter 5 is in communication connection with the acquisition terminals 3 on all branch lines, and can acquire electric energy consumed by users on each branch line, and set the electric energy consumed by users on each branch line to be W. After the total energy E and the electric energy W consumed by the user are obtained, the summary table 5 sends signals of the total energy E and the electric energy W to the monitoring terminal 1, and the monitoring terminal 1 can clearly know whether the line loss rate on the line is within a reasonable range by calculating the line loss rates of the total energy E and the electric energy W. It is known that when the line loss rate is less than or equal to 3%, the line loss is in a reasonable range, and when the line loss rate exceeds 3%, there is a possibility of electricity stealing in the branch line.
The line loss rate on the branch line is within a reasonable range when the line loss rate Q = | (E-w)/2| is within a range of 1% to 3%, whereas the line loss power consumption is abnormal. By the mode, the line loss rate can be calculated through the data information collected by the monitoring terminal 1, and the possibility of electricity stealing can be checked in time.
The implementation principle of the online monitoring system in the embodiment of the application is as follows: the line loss rate can be calculated by comparing the total energy before being distributed to each branch line with the electric energy consumed by the user on each branch line, so that the line loss rate can be timely eliminated when the line loss rate exceeds the range, the risk of electricity stealing is reduced, and then the fault three-phase four-wire electric energy meter 7 can be quickly found out by eliminating the monitoring terminal 1 once the abnormity occurs, so that the troubleshooting efficiency can be effectively improved.
The embodiment of the application further discloses a meter box for installing the online monitoring device and the three-phase four-wire electric energy meter 7.
Referring to fig. 9, table case 4 includes on-line monitoring device and three-phase four-wire electric energy meter 7, and on-line monitoring device is connected with 7 electricity of three-phase four-wire electric energy meter for it is accurate whether the measurement of monitoring three-phase four-wire electric energy meter 7, and in fact, on-line monitoring device is installed to each three-phase four-wire electric energy meter 7.
The implementation principle of a table case 4 in the embodiment of the application is as follows: the mode in table case 4 is all installed with monitor terminal 1 to three-phase four-wire electric energy meter, can easy to assemble, and can reach long-term monitoring, real-time supervision's purpose.
The embodiments of the present invention are preferred embodiments of the present application, and the scope of protection of the present application is not limited by the embodiments, so: all equivalent changes made according to the structure, shape and principle of the present application shall be covered by the protection scope of the present application.
Claims (8)
1. The on-line monitoring device is characterized by comprising a monitoring terminal (1), disturbance equipment (2) which is electrically connected with a three-phase four-wire electric energy meter (7) and is in communication connection with the monitoring terminal (1), and an acquisition terminal (3), wherein the acquisition terminal (3) is in communication connection with the monitoring terminal (1), the disturbance equipment (2) comprises a disturbance load (21), the disturbance load (21) is connected in series in a loop of a controllable load (6) at a user end, the disturbance equipment (2) can send disturbance electricity consumption delta Y brought by the disturbance load (21) to the monitoring terminal (1),
the monitoring terminal (1) comprises a monitoring terminal,
the meter reading module (11) is used for reading the total electricity consumption X of the user side measured by the three-phase four-wire electric energy meter (7);
the metering module (12) is electrically connected with a voltage input end and a current output end of the three-phase four-wire electric energy meter (7) and is used for collecting the actual electricity consumption X1 of the user-side controllable load (6);
the calculating module (13) is used for calculating the total consumption of the actual electricity consumption X1 and the disturbance electricity consumption delta Y and setting the total consumption as Y;
the storage module (14) is used for storing data of actual electricity consumption X1, total electricity consumption X, total consumption Y and disturbance electricity consumption delta Y;
the local communication module (15) is used for realizing local communication among the meter reading module (11), the disturbance equipment (2) and the three-phase four-wire electric energy meter (7);
the remote communication module (16) is used for uploading data of the actual electricity consumption X1, the total electricity consumption X, the total consumption Y and the disturbance electricity consumption delta Y to the acquisition terminal (3);
acquisition terminal (3), acquisition terminal (3) are used for acquireing actual power consumption X1, total power consumption X, total consumption Y and disturbance power consumption DeltaY's data, acquisition terminal (3) include one-level decision module and second grade decision module, one-level decision module is through comparing actual power consumption X1 and total power consumption X's numerical value size preliminary judgement three-phase four-wire electric energy meter (7) whether measure accurately, second grade decision module judges three-phase four-wire electric energy meter (7) through comparing total consumption Y and total power consumption X's size whether measure accurately.
2. An on-line monitoring method, which is applied to the on-line monitoring device as claimed in claim 1, further comprising,
recording the total power consumption X of a user side measured by the three-phase four-wire electric energy meter, and outputting the information of the total power consumption X to an acquisition terminal;
acquiring the actual power consumption X1 of a controllable load of a user side, and outputting the actual power consumption X1 information to an acquisition terminal;
the acquisition terminal compares the actual power consumption X1 with the total power consumption X to judge whether the measurement of the three-phase four-wire electric energy meter is accurate;
acquiring disturbance power consumption delta Y brought by adding a disturbance load, and outputting the disturbance power consumption delta Y to an acquisition terminal;
calculating the total consumption Y of the actual power consumption X1 and the disturbance power consumption delta Y, and sending data information of the total consumption Y and the total power consumption X to an acquisition terminal;
and the acquisition terminal judges whether the metering of the three-phase four-wire electric energy meter is accurate or not by comparing the total consumption Y with the total power consumption X.
3. The on-line monitoring method as claimed in claim 2, wherein the actual power consumption X1 and the total power consumption X setting are metered in a predetermined time period.
4. The on-line monitoring method according to claim 2, characterized in that the added disturbance load (21) is used for changing the current phase angle of the collected user-side controllable load (6) in the three-phase four-wire electric energy meter.
5. The on-line monitoring method according to claim 2, characterized in that the added disturbance load (21) is used for changing the current magnitude of the collected user-side controllable load (6) in the three-phase four-wire electric energy meter.
6. A meter box comprising an on-line monitoring device as claimed in claim 1, said on-line monitoring device being coupled to a three-phase four-wire electric energy meter (7), said three-phase four-wire electric energy meter (7) being mounted in said meter box (4), each of said three-phase four-wire electric energy meter (7) being mounted with said on-line monitoring device alongside.
7. An online monitoring system, characterized in that, the online monitoring device in claim 1 is applied, and further comprises a general meter (5) installed on the bus line, the general meter (5) records the total energy before being distributed to each branch line, the general meter (5) is connected with the acquisition terminals (3) on all branch lines in a communication way, and can acquire the electric energy consumed by users on each branch line.
8. The on-line monitoring system of claim 7, wherein the total energy distributed to each branch line by the summary table (5) is set as E, the power consumed by the user on each branch line is set as W, and when the line loss rate Q = | (E-W)/2| is in a range from 1% to 3%, the line loss rate on the branch line is in a reasonable range, otherwise, the power consumption of the line loss is abnormal.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110502442.6A CN113126020A (en) | 2021-05-08 | 2021-05-08 | Online monitoring device and system and monitoring method applied to device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110502442.6A CN113126020A (en) | 2021-05-08 | 2021-05-08 | Online monitoring device and system and monitoring method applied to device |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN113126020A true CN113126020A (en) | 2021-07-16 |
Family
ID=76781233
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202110502442.6A Pending CN113126020A (en) | 2021-05-08 | 2021-05-08 | Online monitoring device and system and monitoring method applied to device |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN113126020A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114636963A (en) * | 2021-12-13 | 2022-06-17 | 国网河北省电力有限公司营销服务中心 | Electric energy meter state on-line monitoring method and device, terminal and storage medium |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5940009A (en) * | 1997-09-08 | 1999-08-17 | Abb Power T&D Company Inc. | Apparatus and method to detect tampering with an electronic utility meter |
| CN101526557A (en) * | 2009-04-02 | 2009-09-09 | 北京国电富通科技发展有限责任公司 | Electricity steal-resistance load management method |
| CN110048511A (en) * | 2019-05-22 | 2019-07-23 | 上海拜安实业有限公司 | Power grid user and the online dynamic supervision system of transformer relationship and method based on supply side perturbation |
| CN111289831A (en) * | 2020-03-26 | 2020-06-16 | 威胜信息技术股份有限公司 | A kind of distribution line end sensing terminal and line state monitoring method |
| CN215375751U (en) * | 2021-05-08 | 2021-12-31 | 安特仪表集团有限公司 | Online monitoring device, system and meter box using same |
-
2021
- 2021-05-08 CN CN202110502442.6A patent/CN113126020A/en active Pending
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5940009A (en) * | 1997-09-08 | 1999-08-17 | Abb Power T&D Company Inc. | Apparatus and method to detect tampering with an electronic utility meter |
| CN101526557A (en) * | 2009-04-02 | 2009-09-09 | 北京国电富通科技发展有限责任公司 | Electricity steal-resistance load management method |
| CN110048511A (en) * | 2019-05-22 | 2019-07-23 | 上海拜安实业有限公司 | Power grid user and the online dynamic supervision system of transformer relationship and method based on supply side perturbation |
| CN111289831A (en) * | 2020-03-26 | 2020-06-16 | 威胜信息技术股份有限公司 | A kind of distribution line end sensing terminal and line state monitoring method |
| CN215375751U (en) * | 2021-05-08 | 2021-12-31 | 安特仪表集团有限公司 | Online monitoring device, system and meter box using same |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114636963A (en) * | 2021-12-13 | 2022-06-17 | 国网河北省电力有限公司营销服务中心 | Electric energy meter state on-line monitoring method and device, terminal and storage medium |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN109031184B (en) | Monitoring method, system and terminal equipment for electric energy metering device | |
| Nikovski et al. | Smart meter data analysis for power theft detection | |
| CN102928809B (en) | Electric energy metering device remote monitoring diagnostic system and working method thereof | |
| CN202210151U (en) | System for remote checking and monitoring for electric energy metering device | |
| CN110108913B (en) | Method for calculating fault compensation electric quantity | |
| CN202076846U (en) | Power consumption information management system and multi-function electric meter with malicious load identification function | |
| Sreedevi et al. | Development of indigenous smart energy meter adhering Indian standards for smart grid | |
| CN104635198B (en) | Remote monitoring and diagnosing method for electric energy metering device with timely fault finding function | |
| CN101158709A (en) | Accumulator cell real time on-line nondestructive accurate measurement method | |
| CN102236037A (en) | Intelligent electric power inspection management system | |
| CN104678348A (en) | Remote monitoring and diagnosing method for electric energy metering device with high efficiency | |
| KR101175868B1 (en) | Trouble Detecting Device and Method of Watt-hour Metering | |
| CN215375751U (en) | Online monitoring device, system and meter box using same | |
| CN212658814U (en) | Passive power secondary circuit wiring inspection system | |
| CN113126020A (en) | Online monitoring device and system and monitoring method applied to device | |
| CN115932385B (en) | Residual current monitoring method and system and single-phase intelligent electric energy meter | |
| CN104614699A (en) | Higher-efficiency remote monitoring and diagnosis method of electric energy metering device | |
| CN104714206A (en) | Remote monitoring and diagnosing method for electric energy metering device capable of finding faults timely | |
| EP2256505A2 (en) | Voltage monitoring in an advanced metering infrastructure | |
| CN215219111U (en) | An online real-time monitoring and alarm device for multi-point grounding of voltage transformers | |
| CN104614700B (en) | Remote monitoring and diagnosing method for electric energy metering device with good real-time performance | |
| KR20120028210A (en) | Intelligent advanced meter infrastructure and transformer management system | |
| CN104464253A (en) | Intelligent diagnosis method for field electricity information acquisition equipment | |
| CN104656051A (en) | Remote monitoring and diagnosing method for electric energy metering device with good real-time performance | |
| CN117969990A (en) | Line loss analysis method based on solar line loss rate curve characteristics of transformer area |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination |