Abstract:In order to solve the problem that testing and verifying of state estimation for active distribution network is lack of feasible method and means, based on the state estimation function of power system simulation software, a test bed for state estimation functions for active distribution network with various types of distributed energy sources is established. The distribution automation master station imports the standard network model file generated by the test bed to keep the testing model consistent. Based on the host injection method，test bed converts the data provided by power system simulation software to standard protocol data for distribution automation master station. The test bed superimposes power flow results with noise signals as the measurement data for state estimation testing. An active distribution network test case including distributed energy resources has been established to calculate the indices presented for evaluating the precision of calculation and bad data handling capability. The effectiveness of the indices is verified by the test case. With numerous test data generated, the big data analysis method based on statistic index provides a feasible means for state estimation functional testing.