Improvement And Simulation Of Distribution Line Automation Fault Location Algorithm

With the growth of the national economy, China’s power systems increasingly large and more complex, and users of power supply reliability and power quality requirements are also increasing. In modern times, power distribution automation system has been achieved, it is possible to locate the fault, fault isolation section, non-fault zone recovery, reduce outage area, shorten the outage time. The fast and accurate positioning is to isolate the faulty system to restore the non-fault section of the premise, but also an important content distribution grid.Distribution system automation, SCADA systems capable of receiving, recording distribution feeder pillar FTU collected section switch current, voltage and other information, GIS systems capable distribution network topology analysis. In this paper, the use of these two points of information, and then using intelligent optimization algorithms to locate the fault. This article briefly describes some of the characteristics of intelligent optimization algorithm and its application in the distribution network, genetic algorithms and simulated annealing algorithm in-depth study, constructed parallel adaptive genetic annealing algorithm. This algorithm overcomes the genetic algorithm is easy to fall into local optimum solution, and the solution annealing algorithm for the simulation and search capabilities range is not ideal, two-layer structure parallel and serial searches search combination of parallel search and improve the global population search capability also improves the speed of convergence, serial search empower local search, adaptive genetic algorithm to speed up the speed of evolution.Distribution network optimization problems can be regarded as 0/1 of the overall planning, its essence is to find a network device status of each hypothesis to explain the failure information FTU upload. Conventional switching function algorithm and evaluation function improved, the new switch function not only apply to single-supply single power supply failure also applies to more and more failures, the new evaluation function can avoid misjudgment strong performance and fault tolerance.Finally, with MATLAB single failure of a single power distribution network systems and dual power distribution system multiple faults are simulated to verify the feasibility of the algorithm.