CN104635084A - Distribution automation equipment transmission test method based on simulator station - Google Patents

Abstract

A transmission test method for distribution automation equipment based on a simulated master station. It includes making point table information based on the distribution automation site's first-time equipment commissioning application after the distribution automation engineering transformation notice is issued; compiling the distribution automation terminal access network plan; starting the simulation master station, and converting the prepared point information The table is loaded into the database of the simulated master station; steps such as the transmission test are carried out using the simulated master station. The effect of the invention: the time-consuming "remote signaling" and "telemetry" transmission can be completed on the day of power outage reconstruction, and the analog master station can perform non-encrypted remote control on the day of power outage reconstruction to verify the correctness of the secondary wiring of terminal equipment . The invention effectively relieves the situation that the transmission test is limited by the laying progress of optical fibers, optimizes the work flow, improves work efficiency, significantly shortens the time of repeated power outages, and avoids unnecessary losses caused by power grid companies due to long power outages .

Description

A Transmission Test Method for Distribution Automation Equipment Based on Simulated Master Station

technical field

The invention belongs to the technical field of power system distribution automation, in particular to a transmission test method for power distribution automation equipment based on a simulated master station.

Background technique

With the rapid development of the economy, the huge load system has more and more stringent requirements on the reliability of power supply, which has gradually highlighted the problem of "weakness at both ends" of my country's power grid. The distribution network, as the "last mile" of the entire large power grid ", the operating level is still lagging behind. During the 12th Five-Year Plan period, State Grid increased its investment in the construction of smart distribution networks. This time, the proportion of investment in distribution networks exceeded 60% for the first time. It is not difficult to see from the investment of State Grid and a series of policies that domestic smart The distribution network is mainly developing in three aspects, namely: reducing loss, ensuring power quality and power supply reliability. For now, State Grid's investment in smart distribution network is more inclined to improve power supply reliability, including: Measures to prevent failures, improve system reliability, find fault points and repair faults in time, so as to shorten power outage time. Practice has proved that distribution automation is the only way to achieve the above goals. After distribution automation is implemented, faults can be automatically located , to reduce fault finding time; through remote control operation, reduce fault isolation operation time; through standardized emergency repair, reduce fault repair time; finally achieve the effect of reducing fault power outage time.

Distribution automation (DA) is a comprehensive information management system that integrates computer technology, communication technology, control technology and modern equipment, and can monitor, coordinate and control distribution network equipment remotely. Its main purpose is to improve the reliability of power supply. Improve power quality and provide users with better services, thereby reducing operating costs for power grid companies. Under the unified leadership and guidance of Tianjin Electric Power Company and State Grid Corporation of China, Binhai Power Supply Company has comprehensively, systematically and coordinatedly carried out the construction and transformation of distribution network automation in the core area. Among them, the "Sino-Singapore Tianjin Eco-city Smart Grid Demonstration Project" is the only comprehensive demonstration project among the second batch of smart grid pilot projects of State Grid Corporation of China. Distribution automation, as a key sub-item of the project, has received widespread attention since its completion.

Distribution automation system: an automation system that realizes distribution network operation monitoring and control. It has functions such as distribution SCADA (supervisory control and data acquisition), fault handling, analysis applications, and interconnection with related application systems. It is mainly composed of distribution automation systems. It is composed of main station, distribution automation terminal and communication network. Its network architecture is shown in Figure 1.

Master station of distribution automation system (referred to as master station): mainly realizes basic functions such as distribution network data collection and monitoring and extended functions such as analysis and application, and serves distribution network dispatching and distribution production; the master station is generally configured in a bureau-owned building , Scheduling control room.

Distribution automation terminal units can be divided according to different application objects: a. Distribution Terminal Unit (DTU), which is mainly arranged in primary equipment such as power distribution room, pre-ring network device, switching station and box-type substation Above; b. Feeder Terminal Unit (Feeder Terminal Unit, FTU), installed on the overhead feeder unit, for data collection and monitoring of the pole-mounted circuit breaker and pole-mounted load switch; the power distribution terminal unit is mostly configured in the same box as the primary equipment, It has the characteristics of many points, large area and wide distribution range.

Communication network: It is composed of communication lines (this article refers to optical fiber) and distribution automation equipment, and is a series of transmission entities from the terminal service node interface to the master station. It realizes the information interaction between the distribution automation terminal and the main station, and has the functions of multi-service bearing, information transmission, and network management.

Before distribution automation equipment is put into operation, it must go through type inspection, test test, factory acceptance and transmission test in sequence. Among them, the transmission test is the most critical and the last link before the distribution automation equipment is officially put into operation. The purpose of the transmission test is to ensure the function of the terminal equipment is intact, and the accuracy of the correspondence between the distribution automation master station system and the field equipment. Since the transmission test needs to open and close the primary switchgear and apply current to the primary side of the switch, it must be carried out when the power is cut off. The content of transmission test mainly includes:

DI (remote signal) transmission: the purpose is to verify the accuracy and timeliness of the remote signal status of the equipment; method: the actual switch body, the master station checks the switch status on the primary system diagram, and detects the upload time; check content: switch position Signal, remote control input/release signal, fault indicator signal, grounding knife switch signal, etc. Qualified standard: two consecutive shifts, the display of the master station is correct.

AI (telemetry) transmission: the purpose is to verify the accuracy and timeliness of data collection of automation equipment; method: use a current generator to add current to the primary side of the switch, and the current value is between 0.2 times the rated value and 1.2 times the rated value. Check content: the current value of each switch uploaded by the master station side. Qualified standard: The comprehensive error between the telemetry data collected by the master station and the actual addition is less than 1.5%.

DO (remote control) transmission: the purpose is to verify the accuracy and timeliness of remote control operation of equipment. Method: The master station operates the remote control switch on the primary wiring diagram, checks the position of the switch and the delay time, and observes the action of the equipment on site. Check content: remote control opening and remote closing; qualification standard: remote control opening and remote closing are executed correctly, and the transmission time of remote control command selection, execution or cancellation is ≤6s. (According to the State Grid Corporation's No. 168 document, the remote control operation must be performed by the real master station after asymmetric one-way encryption of the operation command and then sent to the automation terminal, so the remote control operation must be transmitted by the real master station.

Under the traditional working mode, the commissioning process of the distribution automation site is shown in Figure 2. The transformation of the distribution automation site involves the installation of an electric operating mechanism on the primary switchgear and some secondary wiring. In order to ensure the safety of the construction personnel, it is required to be carried out in a power outage environment. Therefore, after the distribution automation project transformation notice is issued, the transportation and inspection department must report the power outage plan, and the construction will start after approval by the regulation and operation department. However, the traditional working mode has at least the following disadvantages and deficiencies:

1. For the transformation-type distribution automation site, since the design and construction did not take into account the reserved optical fiber laying channel at the beginning of the construction, it is necessary to re-select the path when laying the optical fiber, which involves problems such as construction and road breaking (must be approved by multiple units) , multi-department negotiation, time-consuming), which resulted in the progress of optical fiber laying far behind the site reconstruction time, unable to synchronize. In the end, the transmission test could not be carried out on the day of power outage and reconstruction. It was necessary to wait for the optical fiber to be connected, and then the transportation and inspection department declared the power outage plan. The workflow of this mode is complex, time-consuming and laborious.

2. Under the traditional working mode, it takes an average of 5 hours to complete the transmission test of an automation site, so the planned power outage time must be declared for at least 7 hours to ensure the smooth completion of the transmission work. In this mode, the power outage time is long, which not only makes the power grid company suffer losses, but also greatly reduces the high-quality service level.

Contents of the invention

In order to solve the above problems, the object of the present invention is to provide a transmission test method for distribution automation equipment based on a simulated master station.

In order to achieve the above object, the distribution automation equipment transmission test method based on the simulated master station provided by the present invention includes the following steps carried out in order:

Step 1. After the distribution automation engineering transformation notice is issued, the point table information is made according to the application for the first-time equipment operation of the distribution automation site; the point table is mainly composed of the address of the information and the corresponding equipment variables, which are collected at the distribution automation terminal After a device-related state quantity or analog quantity changes, the terminal device will send the corresponding point information change to the master station according to the IEC104 protocol, thus realizing the remote monitoring function of the operation personnel of the power grid;

Step 2. According to the network structure of the distribution automation transformation area, prepare the distribution automation terminal access network scheme;

Step 3: Start the simulated master station, load the prepared point information table into the database of the simulated master station; configure the network interface of the simulated master station, in which the gateway and subnet mask must be strictly consistent with the terminal access network scheme, The IP address of the simulated master station should be in the same IP segment as the terminal IP address; after the configuration is completed, enter the DOS mode from the simulated master station, and send the PING command to the terminal to test the connection of the link;

Step 4. Use the simulated master station for the transmission test. After the network is built, the simulated master station has successfully monitored the distribution automation terminal and has the conditions for the transmission test. At this time, use the simulated master station for the transmission test.

In step 1, the point table includes: a remote signaling point table, a telemetry point table and a remote control point table.

In step 2, the distribution automation terminal access network solution needs to configure the following content:

a. Terminal IP address and MAC address;

b. Gateway;

c. Subnet mask;

d. Port number.

In step four, the specific content of the transmission test includes:

(4.1) Select the telemetry information module in the simulated master station; during the telemetry test, the experimenter uses a current generator to add an AC three-phase current value to the primary side of each switchgear in turn, and the current value is selected to be 0.2 to 1.2 times the rated value of the switch. value, and observe whether the error between the current value collected at the corresponding point of the simulated master station and the actual value added is within the allowable range;

(4.2) Select the remote signaling information module in the simulated master station; during the remote signaling test, the tester actually opens and closes the switch body, remote control input/release, fault indicator, and grounding switch, and at the same time checks the corresponding point information of the simulated master station. Whether the remote signaling record of the corresponding displacement occurs;

(4.3) Select the remote control/step adjustment information module in the simulated master station; during the remote control test, the tester sends a remote control command to the terminal on the simulated master station platform to control the opening and closing of the switching device body, and observe the real action of the switch status to verify the success of the remote test.

The beneficial effects of the simulated master station transmission test method provided by the present invention are:

The present invention fully considers the disadvantages of time-consuming, laborious and complicated work process for the transmission test under the traditional working mode, conducts a thorough analysis of the working principle of the distribution automation master station and the terminal, and proposes a new transmission test using the simulated master station Method, the time-consuming "remote signaling" and "telemetry" drives can be completed on the day of power outage reconstruction, and the analog master station can perform non-encrypted remote control on the day of power outage reconstruction to verify the correctness of the secondary wiring of terminal equipment. The invention effectively relieves the situation that the transmission test is limited by the laying progress of optical fibers, optimizes the work flow, improves work efficiency, significantly shortens the time of repeated power outages, and avoids unnecessary losses caused by power grid companies due to long power outages .

Description of drawings

Figure 1 is a schematic diagram of the network architecture of a traditional distribution automation system.

Figure 2 is a flow chart of traditional power distribution automation site commissioning.

Fig. 3 is a start-up interface diagram of the simulated master station in the present invention.

Fig. 4 is an interface diagram of the function module of the analog master station in the present invention.

Fig. 5 is a bit map of remote signaling points of the simulated master station in the present invention.

Fig. 6 is a comparison diagram of transmission test time in the present invention.

Detailed ways

The transmission test method of distribution automation equipment based on the simulated master station provided by the present invention will be described in detail below in conjunction with the accompanying drawings and specific embodiments.

In order to avoid repeated power outages for a long time and bring unnecessary losses to power supply companies, and to optimize the work process, improve work efficiency, and alleviate the unfavorable situation that the power distribution automation transmission test is restricted by the progress of optical fiber laying, the invention provides a simulation based master station The distribution automation equipment transmission test method includes the following steps performed in order:

Step 1. After the distribution automation engineering transformation notice is issued, the point table information is made according to the application for the first-time equipment operation of the distribution automation site; the point table is mainly composed of the address of the information and the corresponding equipment variables, which are collected at the distribution automation terminal After a device-related state quantity or analog quantity changes, the terminal device will send the corresponding point information change to the master station according to the IEC104 protocol, thus realizing the remote monitoring function of the operation personnel of the power grid;

Step 2. According to the network structure of the distribution automation transformation area, prepare the distribution automation terminal access network scheme;

Step 3: Start the simulated master station (see Figure 3), load the prepared point information table into the database of the simulated master station; configure the network interface of the simulated master station, in which the gateway and subnet mask need to be connected with the terminal The network scheme is strictly consistent, and the IP address of the simulated master station should be in the same IP segment as the terminal IP address; after the configuration is completed, enter the DOS mode from the simulated master station, and send the PING command to the terminal to test the connection of the link;

Step 4. Use the simulated master station to conduct the transmission test (see Figure 4). After the network is built, the simulated master station has successfully monitored the distribution automation terminal and has the conditions for the transmission test; at this time, use the simulated master station to conduct the transmission test.

As shown in Figure 6, when using the simulated master station for the transmission test, the power outage time on the day of power outage reconstruction can be fully utilized to complete the time-consuming remote signaling and telemetry transmission, and verify the correctness of the secondary wiring through non-encrypted remote control; After the optical fiber is connected, if there is another power failure, it only needs to perform the remote control opening and closing test of the switch. The planned power outage time is shortened from 7 hours in the traditional mode to 2 hours, and the transmission time is shortened from 5 hours to 25 minutes, which greatly improves the work efficiency. Efficiency, avoiding long repeated power outages.

In step 1, the point table includes: a remote signaling point table, a telemetry point table and a remote control point table; the contents thereof are shown in Table 1-Table 3.

Table 1: Remote signaling point table of SK Chang 4201 station

body address variable specification 0001H DC power failure 0002H DTU device failure 0003H spare 0004H spare 0005H spare 0006H spare 0007H spare 0008H spare 0009H spare 000AH spare 000BH spare 000CH spare 000DH spare 000EH spare 000FH spare 0010H spare 0011H spare 0012H spare 0013H spare 0014H Station change switch position 0015H The location of the grounding knife of the station transformer -27 0016H spare 0017H spare 0018H spare 0019H Total failure alarm 001AH SK Chang 4201-01 switch position 001BH SK Chang 4201-01 fault indicator position 001CH SK Chang 4201-01 remote control enable/disable 001DH SK Chang 4201-01-27 grounding knife position signal 001EH spare 001FH SK Chang 4201-01A phase current fault 0020H SK Chang 4201-01B phase current fault 0021H SK Chang 4201-01C phase current fault 0022H SK Chang 4201-01 current ground fault 0023H SK Chang 4201-01 fault merge

[0049] 0024H SK Chang 4201-02 switch position 0025H SK Chang 4201-02 fault indicator position 0026H SK Chang 4201-02 remote control input/release 0027H SK Chang 4201-02-27 grounding knife position signal 0028H SK Chang 4201-02 trolley working position 0029H SK Chang 4201-02A phase current fault 002AH SK Chang 4201-02B phase current fault 002BH SK Chang 4201-02C phase current fault 002CH SK Chang 4201-02 current ground fault 002DH SK Chang 4201-02 fault merge 002EH SK Chang 4201-03 switch position 002FH SK Chang 4201-03 fault indicator position 0030H SK Chang 4201-03 remote control input/release 0031H SK Chang 4201-03-27 grounding knife position signal 0032H SK Chang 4201-03 trolley working position 0033H SK Chang 4201-03A phase current fault 0034H SK Chang 4201-03B phase current fault 0035H SK Chang 4201-03C phase current fault 0036H SK Chang 4201-03 current ground fault 0037H SK Chang 4201-03 fault merge 0038H SK Chang 4201-04 switch position 0039H SK Chang 4201-04 fault indicator position 003AH SK Chang 4201-04 remote control input/release 003BH SK Chang 4201-04-27 grounding knife position signal 003CH SK Chang 4201-04 trolley working position 003DH SK Chang 4201-04A phase current fault 003EH SK Chang 4201-04B phase current fault 003FH SK Chang 4201-04C phase current fault 0040H SK Chang 4201-04 current ground fault 0041H SK Chang 4201-04 fault merge 0042H SK Chang 4201-05 switch position 0043H SK Chang 4201-05 fault indicator position 0044H SK Chang 4201-05 remote control enable/disable 0045H SK Chang 4201-05-27 grounding knife position signal 0046H spare 0047H SK Chang 4201-05A phase current fault 0048H SK Chang 4201-05B phase current fault 0049H SK Chang 4201-05C phase current fault 004AH SK Chang 4201-05 current ground fault 004BH SK Chang 4201-05 fault merge

Table 2: Telemetry point table of SK Chang 4201 station

body address variable specification 4001H SK Chang 4201-01A phase current 4002H SK Chang 4201-01B phase current 4003H SK Chang 4201-01C phase current 4004H SK Chang 4201-01 zero sequence current 4005H SK Chang 4201-01 cabinet A phase temperature 4006H SK Chang 4201-01 cabinet B phase temperature 4007H SK Chang 4201-01 cabinet C phase temperature 4008H SK Chang 4201-02A phase current 4009H SK Chang 4201-02B phase current 400AH SK Chang 4201-02C phase current 400BH SK Chang 4201-02 zero sequence current 400CH SK Chang 4201-02 cabinet A phase temperature 400DH SK Chang 4201-02 cabinet B phase temperature 400EH SK Chang 4201-02 cabinet C phase temperature 400FH SK Chang 4201-03A phase current 4010H SK Chang 4201-03B phase current 4011H SK Chang 4201-03C phase current 4012H SK Chang 4201-03 zero sequence current 4013H SK Chang 4201-03 cabinet A phase temperature 4014H SK Chang 4201-03 cabinet B phase temperature 4015H SK Chang 4201-03 cabinet C phase temperature 4016H SK Chang 4201-04A phase current 4017H SK Chang 4201-04B phase current 4018H SK Chang 4201-04C phase current 4019H SK Chang 4201-04 zero sequence current 401AH SK Chang 4201-04 cabinet A phase temperature 401BH SK Chang 4201-04 cabinet B phase temperature 401CH SK Chang 4201-04 cabinet C phase temperature 401DH SK Chang 4201-05A phase current 401EH SK Chang 4201-05B phase current 401FH SK Chang 4201-05C phase current 4020H SK Chang 4201-05 zero sequence current 4021H SK Chang 4201-05 cabinet A phase temperature 4022H SK Chang 4201-05 cabinet B phase temperature 4023H SK Chang 4201-05 cabinet C phase temperature

Table 3: SK Chang 4201 station remote control point table

body address variable specification 0001H SK Chang 4201-01 remote control 0002H SK Chang 4201-02 remote control 0003H SK Chang 4201-03 remote control

[0054] 0004H SK Chang 4201-04 remote control 0005H SK Chang 4201-05 remote control

In step 2, the distribution automation terminal access network solution needs to configure the following content:

a. Terminal IP address and MAC address;

b. Gateway;

c. Subnet mask;

d. Port number.

In step four, the specific contents of the transmission test include:

(4.1) Select the telemetry information module in the simulated master station; during the telemetry test, the experimenter uses a current generator to add an AC three-phase current value to the primary side of each switchgear in turn, and the current value is selected to be 0.2 to 1.2 times the rated value of the switch. value, and observe whether the error between the current value collected at the corresponding point of the analog master station and the actual value added is within the allowable range;

(4.2) Select the remote signaling information module in the simulated master station; during the remote signaling test, the tester actually opens and closes the switch body, remote control input/release, fault indicator, grounding switch and other primary equipment, and checks the corresponding points of the simulated master station at the same time Whether the corresponding displacement occurs in the remote signaling record under the bit information (see Figure 5);

(4.3) Select the remote control/step adjustment information module in the simulated master station; during the remote control test, the tester sends a remote control command to the terminal on the simulated master station platform to control the opening and closing of the switching device body, and observe the real action of the switch status to verify the success of the remote test.

Claims (4)

1. A distribution automation equipment transmission test method based on a simulated master station, characterized in that: the described distribution automation equipment transmission test method based on a simulation master station comprises the following steps carried out in order: Step 1. After the distribution automation engineering transformation notice is issued, the point table information is made according to the application for the first-time equipment operation of the distribution automation site; the point table is mainly composed of the address of the information and the corresponding equipment variables, which are collected at the distribution automation terminal After a device-related state quantity or analog quantity changes, the terminal device will send the corresponding point information change to the master station according to the IEC104 protocol, thus realizing the remote monitoring function of the operation personnel of the power grid; Step 2. According to the network structure of the distribution automation transformation area, prepare the distribution automation terminal access network scheme; Step 3: Start the simulated master station, load the prepared point information table into the database of the simulated master station; configure the network interface of the simulated master station, in which the gateway and subnet mask must be strictly consistent with the terminal access network scheme, The IP address of the simulated master station should be in the same IP segment as the terminal IP address; after the configuration is completed, enter the DOS mode from the simulated master station, and send the PING command to the terminal to test the connection of the link; Step 4. Use the simulated master station for the transmission test. After the network is built, the simulated master station has successfully monitored the distribution automation terminal and has the conditions for the transmission test. At this time, use the simulated master station for the transmission test. 2. The distribution automation equipment transmission test method based on the simulated master station according to claim 1, characterized in that: in step 1, the point table includes: remote signal point table, telemetry point table and remote control point surface. 3. The transmission test method of power distribution automation equipment based on the simulated master station according to claim 1, characterized in that: in step 2, the following content needs to be configured in the distribution automation terminal access network scheme: a. Terminal IP address and MAC address; b. Gateway; c. Subnet mask; d. Port number. 4. the distribution automation equipment transmission test method based on the simulated master station according to claim 1, characterized in that: in step 4, the specific content of the transmission test comprises: (4.1) Select the telemetry information module in the simulated master station; during the telemetry test, the experimenter uses a current generator to add an AC three-phase current value to the primary side of each switchgear in turn, and the current value is selected to be 0.2 to 1.2 times the rated value of the switch. value, and observe whether the error between the current value collected at the corresponding point of the analog master station and the actual value added is within the allowable range; (4.2) Select the remote signaling information module in the simulated master station; during the remote signaling test, the tester actually opens and closes the switch body, remote control input/release, fault indicator, and grounding switch, and at the same time checks the corresponding point information of the simulated master station. Whether the remote signaling record of the corresponding displacement occurs; (4.3) Select the remote control/step adjustment information module in the simulated master station; during the remote control test, the tester sends a remote control command to the terminal on the simulated master station platform to control the opening and closing of the switching device body, and observe the real action of the switch status to verify the success of the remote test.