Risk analysis of closING loop operation based on the main and distribution network integration

Risk analysis of closing loop operation based on the main and distribution network integration is presented in this paper. The main network provides the service to calculate the equivalent model of the high voltage grid, and the distribution network calculates close loop current and estimates its influence. After calculations, low-voltage network of electromagnetic loop to be equivalent in distribution network, the main network analyzes and estimates the effects of close loop operation of distribution network on secure operation of the main network. The method of calculation and analysis is based on real-time data in this paper. The accurately equivalent real-time model of medium and high voltage side of network is obtained, the detailed calculation and analysis of close loop current is achieved, and the comprehensive security assessment of power grid after close loop operation is conducted. Field tests verify the correctness and effectiveness of the proposed method, which could provide significant reference to the operation and dispatching of actual power network.