CN108631298A - A kind of unit style distribution network restoration strategy-generating method based on load balancing distribution - Google Patents

Abstract

The invention discloses a method for generating a restoration strategy of a unit distribution network based on load balance distribution. Step 1: the system starts fault restoration; Step 2: searches for a matching fault restoration plan through an expert database matching algorithm; The path method automatically generates a recovery processing strategy for load balancing distribution; Step 4: For all the recovery strategies generated by the above algorithm, calculate its reliability weighted value and operation optimization weighted value, compare the weighted scoring results of the optimal recovery strategy, and confirm the current fault recovery The optimal executable strategy of ; Step 5: start to execute the optimal strategy, and store the remaining strategies in the database according to the weighted score sorting results, as a backup plan. The invention improves the optimized high-efficiency performance of distribution network operation, thereby fundamentally improving the reliability of power supply and improving user satisfaction.

Description

A Restoration Strategy Generation Method for Unit System Distribution Network Based on Load Balance Distribution

technical field

The invention relates to a method for generating a restoration strategy of a unit system distribution network based on load balance distribution, and belongs to the technical field of distribution networks.

Background technique

The safe and reliable operation of distribution network is directly related to social production and people's life. Once the distribution network fails, it will bring great inconvenience to people's life. With the automation of distribution network getting higher and higher, carrying out fault recovery of distribution network is an important guarantee to improve the safety and economy of distribution network, and it is also an important part of distribution automation.

At present, the distribution network fault recovery technology mainly adopts the traditional method of comparing the load rate to optimize the recovery. However, due to the different load types and load levels of distribution network users, the current distribution network power supply restoration strategy is becoming more and more complicated, and the original processing mode can no longer meet the requirements of the existing distribution network power supply.

Contents of the invention

Purpose: In order to overcome the deficiencies in the prior art, the present invention provides a recovery strategy generation method based on load balance distribution for unit system distribution network.

Technical solution: In order to solve the above-mentioned technical problems, the technical solution adopted in the present invention is:

A method for generating a recovery strategy for a unit system distribution network based on load balancing distribution, comprising the following steps:

Step 1: The system starts fault recovery;

Step 2: Search for matching fault recovery schemes through the expert library matching algorithm;

Step 3: Automatically generate a recovery processing strategy for load balancing distribution through the critical path method;

Step 4: For all the recovery strategies generated by the above algorithm, calculate their reliability weighted value and operation optimization weighted value, compare the weighted scoring results of the optimal recovery strategy, and confirm the current optimal executable strategy for fault recovery;

Step 5: Start to execute the optimal strategy, and store the remaining strategies in the database according to the weighted score sorting results, as a backup plan;

Step 6: Determine whether the strategy is successfully executed. If not, automatically generate a reliable recovery strategy and execute the strategy while retaining the operating mode of some devices that have been operated;

Step 7: The processing strategy is successfully executed, the fault recovery processing is completed, a fault processing report is formed, and all information is recorded for post-accident analysis and expert database upgrade.

As a preferred version, said step 2 includes the following steps:

2.1: Generation of expert database, through full-cycle rehearsal analysis of the normal operation mode and abnormal operation mode of the unit system distribution network, and all rehearsal analysis results are stored in the expert database according to the optimal recovery model processing strategy under different operation modes Used for matching search when a fault occurs;

2.2: Matching search, using data fuzzy matching method, including operation data matching, fault type matching, section mode matching, to ensure the accuracy of fault matching;

2.3: After completing the matching search, check whether there is an expert database processing logic that satisfies the conditions. If so, obtain the expert database optimization processing strategy and add it to the optimal strategy comparison queue; if there is no expert database processing logic, discard the expert database strategy.

As a preferred solution, the data of the operation mode comes from the actual data of system operation and assists in adding theoretical calculation values as a supplementary method for abnormal situations.

As a preferred solution, the automatic strategy generation in the step 3 is generated by an automatic generation method of distribution network fault restoration strategy based on the critical path method.

As a preferred solution, the reliability weighted value considerations in step 4 include the load rate of the power supply after the transfer; the multi-power nature of all multi-power loads on the line after the transfer, including detecting whether the multi-power load still has multiple power sources, multi-power sources Whether the nature of the power supply is reliable like the factory station, the same busbar, and the same feeder; the reliability of the transfer switch operation, including whether the switch is controllable and the success rate of remote control; the nature of the transfer power supply, including: main grid power supply, distributed power supply; transfer power supply Reliability, including the failure rate of the transfer source and the transfer line; the nature of the transfer load and the factors affected by the weather.

As a preferred solution, in the step 4, the running optimization weighted value takes into account factors such as cable line loss analysis and load distribution balance degree.

Beneficial effects: the present invention provides a method for generating a distribution network restoration strategy based on load balance distribution. This method makes full use of the management advantages of the distribution network model in the unit system mode, and proposes a unit system based on load balance distribution. Distribution network recovery strategy generation method, the implementation of this technical method can solve the power supply recovery requirements of non-faulty areas in complex distribution networks, and the calculation time is fast, and the complex recovery strategy generation time can be ignored in the overall processing logic, which meets the requirements of the distribution network. High efficiency requirements for power grid fault handling. Therefore, on the basis of ensuring safety and stability, the automatic generation method of the power supply recovery optimization strategy of the unit system distribution network based on load balance distribution can improve the optimized, high-efficiency performance of the distribution network operation, thereby fundamentally improving the reliability of power supply. user satisfaction.

Description of drawings

Fig. 1 is a flow chart of the method of the present invention.

Detailed ways

The present invention will be further described below in conjunction with the accompanying drawings.

The automatic generation method of power supply restoration optimization strategy for unit system distribution network based on load balance distribution adopts the processing mode combining patternization and automatic strategy, and automatically identifies the fault restoration processing method to meet the power supply demand.

In the automatic generation method of the optimization strategy for the power supply restoration of the unit system distribution network based on load balance distribution, the model processing strategy is obtained by performing a preview analysis on the operation mode of the unit system distribution network. The model processing strategy for optimal recovery is stored in the expert database for faults Matching search at the time of occurrence; automatic strategy generation adopts the critical path method to automatically generate a recovery processing strategy for load balancing distribution.

In the automatic generation method of the power supply recovery optimization strategy of the unit system distribution network based on load balance distribution, the automatic identification fault recovery processing method refers to searching the expert database for the recovery strategy in line with the current fault handling through the expert database matching algorithm when a fault occurs. The path method automatically generates a recovery strategy for load balancing distribution, and calculates the reliability weighted value and the operation optimization weighted value for the two strategies respectively, compares the optimal recovery strategy, and confirms that it is an executable strategy for current fault recovery.

The reliability weighted value considerations in the automatic generation method of the power supply recovery optimization strategy of the unit distribution network based on load balance distribution include the load rate of the power supply after the transfer, the multi-source nature of all the multi-source loads on the line after the transfer (detection of the multi-source load Whether it still has multiple power sources, whether the nature of multiple power sources is reliable (like the factory station, the same busbar, the same feeder, etc.), the reliability of the operation of the transfer switch (whether the switch is controllable, the success rate of remote control, etc.), the nature of the transfer source ( Main grid power supply, distributed power supply, etc.) and reliability (transfer source, failure rate of transfer line), transfer load nature and other factors; the weighted value of operation optimization considers the main wired line loss analysis, load distribution balance and other factors.

In the automatic generation method of the power supply restoration optimization strategy of the unit system distribution network based on load balance distribution, due to the use of the unit system distribution network, the amount of equipment in the unit is small, so complex search for recovery strategies and analysis and calculation of advanced applications are all possible. And there is no non-convergence problem. The calculation time is fast and can be ignored in the overall processing logic, which meets the high efficiency requirements of distribution network fault processing.

In terms of the final strategy execution, if the operation strategy fails to execute, it will automatically generate a reliable one based on the operation mode of some equipment that has been operated at present. Failure recovery strategy. This processing method can avoid repeated opening and closing operations of the switch and ensure the performance of the device itself. In the part of automatically generating a reliable recovery strategy, a fast strategy generation algorithm is adopted, and the recovery strategy can be executed safely and stably.

As shown in Figure 1, a recovery strategy generation method based on load balance distribution of unit system distribution network, the specific process is described as follows:

Step 1: The system starts fault recovery.

Step 2: Search for matching fault recovery schemes through the expert library matching algorithm.

The expert database is generated through the full-cycle preview analysis of the conventional operation mode and abnormal operation mode of the unit system distribution network (the operation mode data comes from the actual data of the system operation and the auxiliary theoretical calculation value is added as a supplementary method for abnormal situations), and the All the rehearsal analysis results are obtained under different operating modes, and the optimized recovery model processing strategies are stored in the expert database for matching search when a fault occurs.

The matching search adopts multiple data fuzzy matching methods such as operation data matching, fault type matching, and section mode matching to ensure the accuracy of fault matching.

After the matching search is completed, check whether there is an expert library processing logic that meets the conditions. If so, obtain the expert library optimization processing strategy and add it to the optimal strategy comparison queue (the use of the expert library strategy requires the processing verification of the strategy under the current operating mode and fine-tuning to ensure the feasibility of the processing strategy). If there is no expert database processing logic, abandon the expert database strategy.

Step 3: Automatically generate a recovery processing strategy for load balancing distribution through the critical path method.

The automatic strategy generation adopts the distribution network fault recovery strategy automatic generation method based on the critical path method, which is characterized by calculation convergence and fast operation speed. When using the unit system distribution network model, due to the independence of the unit in the model design, the calculation dimension is greatly reduced, the calculation time is further shortened, and the calculation accuracy is improved.

Step 4: Calculate the reliability weighted value and operation optimization weighted value of all the recovery strategies generated by the above algorithm, compare the weighted scoring results of the optimal recovery strategy, and confirm the optimal executable strategy for the current fault recovery.

Reliability weighted value considerations include the load rate of the power supply after the transfer, the multi-source nature of all the multi-source loads on the line after the transfer (check whether the multi-source load still has multiple sources, and whether the properties of the multiple sources are reliable like the factory station and the same busbar) , the same feeder, etc.), the reliability of the transfer switch operation (whether the switch is controllable, the success rate of remote control, etc.), the nature of the transfer source (main grid power supply, distributed power supply, etc.) and reliability (transfer source, transfer Factors such as the failure rate of the supply line), the nature of the transfer load, and factors affected by the weather; the weighted value of the operation optimization considers the main line loss analysis, load distribution balance and other factors.

Step 5: Start to execute the optimal strategy, and store the ranking results of the remaining strategies in the database according to the weighted score as a backup plan.

Step 6: Determine whether the strategy is executed successfully. If not, automatically generate a reliable recovery strategy and execute the strategy while retaining the operating mode of some devices that have been operated.

The patent of the present invention here particularly emphasizes retaining the operation mode of some equipment that has been operated at present. The main purpose is to reduce the number of opening and closing of the switch in a short period of time and ensure the reliability of the equipment. Therefore, after the switch operation fails, the original generated backup processing strategy is not used immediately. Although the backup processing speed is fast, there may be a problem of repeated opening and closing of the switch, especially in the event of a large-scale power outage. Large-scale load transfer, due to the large number of operating switches, the less repetitive work the number of switching operations, the sooner the fault recovery will be completed. In addition, adopting the original generation backup strategy may also cause problems such as the expansion of the unrecoverable area. The rapid automatic strategy generation method is a quick supplementary strategy based on the original execution steps. Since it does not perform complex mathematical operations, the generation of the strategy itself can meet real-time requirements. In addition, it does not perform repeated operations on the restored areas, which can unrecoverable The area is reduced to the minimum, and at the same time, repeated power outages to users can be reduced, and user satisfaction can be improved.

Step 7: The processing strategy is successfully executed, the fault recovery processing is completed, a fault processing report is formed, and all information is recorded for post-accident analysis and expert database upgrade.

The above is only a preferred embodiment of the present invention, it should be pointed out that for those of ordinary skill in the art, without departing from the principle of the present invention, some improvements and modifications can also be made, and these improvements and modifications are also possible. It should be regarded as the protection scope of the present invention.

Claims (6)

1. a kind of unit style distribution network restoration strategy-generating method based on load balancing distribution, it is characterised in that：Including as follows Step：

Step 1：System proceeds by fault recovery；

Step 2：Matched fault recovery scheme is searched for by experts database matching algorithm；

Step 3：The recovery that load balancing distribution is automatically generated by critical path method handles strategy；

Step 4：To all recovery policies that above-mentioned algorithm generates, its reliability weighted value and running optimizatin weighted value are calculated, than To optimal recovery policy weighted scoring as a result, confirming the optimal executable strategy that current failure restores；

Step 5：Start to execute optimal policy, and remaining strategy is stored according to weighted scoring ranking results in database, as Alternative scheme；

Step 6：Whether determination strategy runs succeeded, if being not carried out success, in the fortune for retaining current operation part equipment Under line mode, reliable recovery policy, and implementation strategy are automatically generated；

Step 7：Strategy execution success is handled, Petri Nets are completed, troubleshooting report is formed, all information is recorded and is used It is used in accident post analysis and experts database upgrading.

2. a kind of unit style distribution network restoration strategy-generating method based on load balancing distribution according to claim 1, It is characterized in that：The step 2 includes the following steps：

2.1：Experts database generates, and complete alternation is carried out by conventional operation mode to unit style power distribution network and misoperation mode Preview analysis, and the medelling processing strategy deposit that the optimization under different running method restores is obtained to all preview analysis results Matching search when experts database occurs for failure；

2.2：Matching search, using data Method of Fuzzy Matching, including operation data matching, fault type matching, section mode Matching, ensures the accuracy of Trouble Match；

2.3：After completing matching search, the experts database processing logic of the condition of satisfaction is checked whether there is, if so, then obtaining experts database Optimization processing strategy is added optimal policy and compares queue；If not having experts database processing logic, experts database strategy is abandoned.

3. a kind of unit style distribution network restoration strategy-generating method based on load balancing distribution according to claim 2, It is characterized in that：The data source of the method for operation is in system operation real data and assists increasing calculated value as different The completion mode of reason condition.

4. a kind of unit style distribution network restoration strategy-generating method based on load balancing distribution according to claim 1, It is characterized in that：Strategy Auto generates automatic using the distribution network failure recovery policy based on critical path method in the step 3 Generation method generates.

5. a kind of unit style distribution network restoration strategy-generating method based on load balancing distribution according to claim 1, It is characterized in that：There is reliability weighted value Consideration in the step 4 turns to supply rear power source loads rate；Turn for owning on rear circuit Whether more power supply natures of more power supply loads, including the more power supply loads of detection still have more power supplys, and whether the property of more power supplys Reliably such as plant stand, same to busbar, same to feeder line；Turn the reliability for switching manipulation, including switchs whether controllable, successful rate of remote control； Turn power supply source property, including：Main electric network source, distributed generation resource；Turn power supply source reliability, including turns power supply source, turns for circuit Failure rate；Turn for load character and by weather influence factor.

6. a kind of unit style distribution network restoration strategy-generating method based on load balancing distribution according to claim 1, It is characterized in that：Running optimizatin weighted value considers the analysis of wire line damage, sharing of load equilibrium degree factor in the step 4.