Research on the Evaluation of Self-healing Capability in Smart Distribution Grid After a Fault
Aiming at the problem to assess the self-healing capability of smart distribution grid after a fault,an index self-healing ability judgement method is designed with the key indexes of self-healing ability as the assessment criteria.Firstly,based on the consideration of demand-side management and distribution grid automation level,the indexes to measure the self-healing capability of smart distribution grid are established.Then,fault traversal is used as a validation method to simulate the recovery process after faults in each section of the distribution grid.Further,the self-healing capability of smart distribution grid is evaluated according to the proposed indexes,so as to obtain the self-healing weak segments and weak time periods,and the self-healing capability of the distribution system is calculated after a fault by using the probability of faults as the weight of testing the self-healing capability.Finally,a digital simulation model of the distribution system is constructed,and the distribution system is divided into 10 zones,which are verified sequentially to prove the correctness and feasibility of the proposed evaluation indexes.The probability of failure of a power supply zone is used as the weight of the self-healing capability level of the zone to calculate the system-wide self-healing capability level.A digital simulation of the distribution system with 10 zones is carried out to prove the validity of the proposed evaluation indexes and evaluation methods.
smart distribution gridassessment indexassessment methodself-healing controlpower recovery
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NSTL
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