Analysis of the State Estimation Performance in Transient Conditions

Abstract—An accurate and reliable performance of a state esti-mation under all network conditions is crucial for the monitoring of power systems and thus their secure operation. State estimation is based on a static representation of the power system, although the most critical operation conditions occur when power system is in dynamic transition from one state to another. We propose how the performance of a state estimator can be monitored, evaluated during dynamic conditions and which fac-tors affect it most. Based on that, we propose a method, which can be used to guide upgrading of a state estimation infrastructure to improve the state estimator performance during dynamic condi-tions. We demonstrate our suggestions on a test system. Index Terms—Measurements, power system dynamics, power system monitoring, power system planning, state estimation, tra-jectory sensitivities. I