Construction of Safety Evaluation Model for Distribution Network with Distributed Generation

With the continuous change in urban power demand, many problems in the urban power system are exposed, and distribution network planning is one of the more prominent ones. In the operation of the distribution network, the access of distributed generation will have a certain degree of impact on power quality, relay protection, current protection of the distribution network, and energy consumption loss. Therefore, in order to improve the evaluation accuracy of the distribution network security evaluation model, obtain a more realistic situation evaluation value, and expand the overall evaluation scope, this paper constructs the distribution network operation security evaluation model under distributed generation access. Firstly, the subjective weight of evaluation is determined, and the evaluation index system of the power grid operation security situation is designed under the background of power access. Secondly, the multi-source extension fuzzy evaluation matrix is constructed, and the model is established by comprehensive weighting processing. Finally, the test experiment is carried out. The test results show that compared with the traditional power grid operation security evaluation model, the power grid situation evaluation value obtained by the distribution network operation security evaluation model constructed in this paper is relatively high. This shows that the model has a good evaluation effect on the operation security of the distribution network, with high evaluation authenticity and small error, and has a high practical application value.