Interval evaluation method of distribution network restoration scheme based on incomplete index weight information

Abstract

The invention discloses a distribution network fault restoration scheme interval evaluation method under incomplete index weight information. On the basis of establishing the restoration scheme evaluation index set, the normalized decision matrix of restoration scheme interval evaluation is calculated. The approximate range of index weight is expressed as interval number, and the grey relational degree between each restoration scheme and the ideal restoration scheme is calculated to form the grey relational degree matrix. On this basis, a single objective decision-making model is established to obtain the optimal weight vector of the restoration scheme. Furthermore, the optimized index weights are obtained by solving the optimization model, so that the grey relational degree values of allrestoration schemes are as large as possible. Then, according to the grey relational degree value of each restoration scheme, the ranking results of the restoration schemes are given. The method of the invention solves the problem of evaluating the fault restoration scheme of the distribution network under the condition of incomplete weight information, fully takes into account the difference of information distribution on each evaluation index value of all candidate restoration schemes, and the evaluation result is reasonable and credible.

Description

technical field [0001] The invention relates to the technical field of distribution network fault recovery, in particular to an interval evaluation method for distribution network fault recovery schemes under incomplete index weight information. Background technique [0002] Distribution network fault recovery uses a certain fault recovery strategy to operate the tie switch and section switch in the distribution network to quickly restore the power supply in the non-fault outage area. It needs to comprehensively consider the number of switch operations, feeder margins, and load recovery. It is an important content of the self-healing control of the smart distribution network to determine the optimal power supply restoration scheme based on the quantity and other factors. It is of great significance to reduce the losses caused by power outages and improve the economy of the distribution network. In the process of formulating distribution network fault recovery schemes, dispat...

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Problems solved by technology

In the process of formulating distribution network fault recovery schemes, dispatchers usually can only grasp the importance of each evaluation index and give a rough range of evaluation index weights, but it is difficult to give the exact weight value of evaluation indicators, that is: in practice In the formulation of the recovery plan, decisions can only be made when the information on the weight of the evaluation index is incomplete

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