Distribution Network Fault Restoration Method Based on Load Balance Expected Value Search
A technology for distribution network fault and load balancing, applied in the field of feeder automation, can solve the problems of many iterations and searches, low computational efficiency, and great influence on search results, etc. clear effect
Active Publication Date: 2017-03-29
STATE GRID CORP OF CHINA +3
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Problems solved by technology
Mathematical optimization methods have a complete and rigorous mathematical theoretical basis, but this type of solution has many iterations and searches, and the real-time performance is not strong, especially for simple networks.
The heuristic search method is a common method for distribution network faults. In the search process, some heuristic information is added according to the problem itself, so that it can be optimized towards the optimal direction; but the initial state of the system has a great influence on the search results. The method The stability is not good enough; when heuristic rules deal with fault recovery problems, there are limitations in search direction, and the calculation efficiency is not high
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[0031] Best practice:
[0032] First, define the expected value of load balancing as follows:
[0033] Load balancing means that the load rate of each power supply point participating in the restoration of power supply should be balanced as much as possible after the power supply is restored.
[0034] The section load and the load of the power point are reflected by the daily maximum current, and the load rate is the maximum value of the ratio of the daily maximum current of each section of the power supply feeder to the rated current of the feeder.
[0035] The expected value of load balance means that under the load balance target, the load rates of all power supply points expected to participate in the restoration of power supply are equal after the power supply is restored, and the ideal load rate is the expected value of load balance load rate.
[0036] The calculation method of load balancing expectation value S (load rate) is as follows:
[0037] According to the prin...
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The invention relates to the field of feeder automation, in particular to a power distribution network failure recovery method based on load balance expected value search, and solves the problem that the coordination of multiple interconnection switches is needed for power restoration after a power distribution network failure. According to the overall scheme of the power distribution network failure recovery method, in the process of power restoration, each power source site conducts search targeting a load balance expected value, and the number of power-losing zones without failures is increased step by step to form a final failure recovery scheme. The power distribution network failure recovery method is a failure recovery scheme forming method which can conduct simple target comparison in parallel, and is clear in directivity, low in calculated amount and capable of realizing fast formation of a power distribution network power restoration scheme targeting load balance.
Description
technical field [0001] The invention relates to the field of feeder automation, in particular to a distribution network fault recovery method based on load balancing expectation value search, which relates to the problem of power supply recovery after a distribution network fault requiring the coordination and cooperation of multiple tie switches. Background technique [0002] The fault recovery problem of the distribution network refers to finding out a reasonable fault recovery scheme in a timely manner after a power outage occurs in the distribution network, and recovering the power supply to the non-fault outage area by operating the contact switch and the section switch . When multiple contact switches cooperate to restore power supply, in order to avoid overload due to uneven load distribution and ensure that each power supply point has sufficient reserve capacity when the system fails again, when the power supply is restored after the distribution network fails, it mu...
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IPC IPC(8): H02H7/26H02H3/06
Inventor 李天友王庆华黄建业朱国防高厚磊
Owner STATE GRID CORP OF CHINA