Modeling and Simulation of Unstable High Resistance Grounding Fault based on RTDS

RTDS is an effective simulation method for mining and processing the hidden criterion of protection device. Based on the case of invisible criterion blocking line protection under unstable high resistance grounding fault, this paper analyzes the test requirements, platform, equipment parameters and test items of modeling and simulation of unstable high resistance grounding fault based on RTDS, on the basis of accurately grasping the characteristics of the change of unstable high resistance ground resistance. The test results show that the proposed simulation model can accurately fit the characteristics of unstable high resistance grounding fault. Based on the summary of the test results, this paper further puts forward engineering suggestions for optimizing the operation performance of the protection device.