基于广域测量系统的电力系统动态仿真验证策略

A Simulation Validation Strategy Based on Wide Area Measurement

对后验仿真准确度的研究是电力系统仿真可信度研究的重要组成部分,但当仿真与实测有差异时,如何进行仿真验证工作成为一个难题。根据广域测量系统(WAMS)能够提供独立于模型和参数的动态过程同步数据的特点,提出了基于WAMS的电力系统分层分块的动态仿真验证策略。分层策略利用电网由不同电压等级所组成的特点将电网分层,在不同层次上进行仿真验证;分块策略则是利用电网结构按照元件和区域的思想将系统进行解耦来实现仿真验证。通过上述策略,将WAMS量测值作为电网数值仿真的动态等值输入,实现了仿真的解耦,缩小了定位引起仿真误差元件的区间。结合电力系统仿真软件PSS/E给出了基于WAMS的分层分块仿真验证策略的工程实现途径。

Digital simulation is the guiding tool in power system operation and control. Thus, its veracity directly affects both the security and economical operation of a power system. Since the wide area measurement system （WAMS） can provide synchronous dynamic data independent of models and parameters, this paper presents a simulation validation strategy based on WAMS to decouple the system into small areas with fewer components at different voltage levels. Therefore, by taking the measured data of WAMS as dynamic equivalent signals in digital simulation, the simulation validation work can be carried out in a much specified area and the wrong component causing the error can be found. The realization method of the simulation validation strategy proposed is also presented via the PSS/E simulation tool. Detailed case studies show the effectiveness of the method.