Research on Parameter Correction Strategy Based on Multi-trajectories Characteristics

Dynamics numerical simulation is a basic tool for dynamic safety analysis and control in power system.The numerical simulation trajectories are out of accord with those of wide area measurement system(WAMS) and the errors are mainly reflected in the differences of dynamic characteristics between simulation trajectories and measured trajectories,which make the simulation results difficult to describe the dynamic behavior of the actual system.Therefore,the article casts about for effective dynamic characteristics via grounding on measured trajectories and identifies error sources of simulation trajectories by analyzing impact from parameter change of model upon trajectories so that the trajectory errors can be directly mapped to parameters to correct model parameters and raise reliability of numerical simulation.