基于多轨迹特征提取的参数校正策略研究

电力系统动态数值仿真是电力系统动态安全分析和控制的基本工具。数值仿真轨迹与广域测量系统(wide area measurement system,WAMS)测量轨迹不一致,其误差主要表现在仿真轨迹所体现的动态特征与实测轨迹所体现的动态特征不同,使仿真结果难以描述实际系统的动态行为。为此,基于实测轨迹寻找有效的动态特征,并通过分析模型参数变化对轨迹的影响确定仿真误差源,使轨迹的误差直接映射到参数上,实现对模型参数的校正,提高数值仿真的可信度。

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.