The Comprehensive Evaluation of DG Grid-Connected Plans Considering Danger Level of Indices

The integration of high penetration level of DGs will change the operation condition of distribution network significantly. Indices are simplified based on the influence factors of DGs' integration for distribution network. Then the concept of danger level is proposed so that comprehensive benefit and comprehensive danger level is evaluated from positive and negative sides respectively. The combination of these two evaluations could realize the effect that the comprehensive evaluation ranks the benefits while the danger level eliminates risk. Case study is conducted to simulate the integrated evaluation of different DG grid-connected plans. Compared with the former research results, the proposed method is of reasonability and superiority. It can be summarized that this method could not only crosswise compare different DG grid-connected plans, but it could also evaluate the single one, and gives the reference for the calculation of DG accommodation capability.