Research On Reconfiguration Method Of Self-healing Control System On Large-scale Industrial Enterprise Gird

Large-scale industrial enterprises play a highly important role in the nationaleconomy．For their large power consumption，rising production levels，and equipmentrequirements for stable grid operation，the safe and economic operation is critical ininternal grid of enterprise gird．Self-healing control technology could optimize thenetwork structure in normal operation of the power grid， improve security andstability margin，reduce network loss，quickly isolate the power fault and restoresevice after a fault occurs in power network．Self-healing control technology becomean important safeguard for secure，economic，stable and efficient operation of thegrid．This paper focuses on network reconfiguration method of self-healing control onlarge-scale industrial enterprise grid．Firstly，this paper introduces the basic content of the self-healing control，discusses the principle，the conditions and modes of self-healing control，studies theobjectives and strategies of self-healing power grid control in different operatingconditions，and constructs the framework of self-healing control system in largeindustrial enterprise grid．Secondly， for economic network reconfiguration of self-healing control onlarge-scale industrial enterprise grid，the particle swarm optimization algorithm basedon multi-model system is proposed． The advanced algorithm adopt multi-modelsystem and adjust the speed inertia coefficient to solve the problem of precocity．Itgenerated multi-center particle update system to expand the search range，enhance theanti-premature ability，and reduce the risk of falling into local optimal solution．Ringnetwork coding method and power isolated island research pattern used in particleupdate can solve the problem that infeasible solutions generated．Thirdly，for fault network reconfiguration of self-healing control on large-scaleindustrial enterprise grid，multi-line service restoration of distribution network afterpower failure algorithm based on load distribution is proposed．The algorithm offailure recovery calculate extreme load distribution ratio for the objective of lossminimization in non-lost electric area，and critical load distribution ratio for the thevoltage and current security constraints． From a combination of the two loaddistribution，optimal load distribution ratio can be obtained．Then，based on actualnetwork structure，the actual load distribution，mostly closest to the optimal load distribution，can be found．Power flow calculation can be used to test whether thescheme satisfies the requirement of safe and economic or not．The reasonable andeffective load distribution scheme that dividing lost electricity area and completingnetwork fault reconstruction，can be obtained．The algorithm meets not only therequirements of fast power recovery operation，but also the request that distributionnetwork can be in economic and secure operation．Finally，based on the five110kV regional substation and the following10kV gridworkshop substation in Shougang Jingtang iron&steel company as a research object，the network reconfiguration is proceeded by particle swarm algorithm based onmultiple model system to optimize power grid operation．The method effectivelyavoids network loss．Based on bus1lost power supply on10kV side of1#110kV areasubstation as a research object，the network reconfiguration is proceeded by multi-lineservice restoration of distribution network after power failure algorithm based on loaddistribution for service restoration of failure power area．The method provides thebest network reconfiguration decision-making scheme quickly and efficiently fordispatch and operation staff．...