考虑时滞影响的电力系统稳定分析和广域控制研究进展

Overview of Power System Stability Analysis and Wide-area Control in Consideration of Time Delay

计算机技术、网络技术和通信技术的快速发展及其在电力系统中的广泛应用,使得电力系统的监测、分析和控制方式向着广域化、网络化和智能化方向发展。在此发展过程中,一个不容忽视的问题就是信号传输和处理过程中时滞的影响。文中首先对广域测量系统的时滞特性进行了分析,接着对国内外考虑时滞影响的电力系统建模、稳定分析和广域控制3个方面的最新研究成果进行了综述,指出常规电力系统稳定分析方法与考虑时滞的状态估计方法相结合具有工程实践价值,并认为在电力系统时滞特性的定量分析、信息和电力网络综合建模、考虑时滞的状态估计以及基于时滞电力系统动力模型的稳定控制方面仍需进一步深入研究。最后展望了时滞电力系统稳定分析和广域控制可能的研究方向。

The fast development and wide application of computer technology, network and communication technology in power system is driving the research of power system operation and control to the trend of wide-area, web-based and intelligent monitoring and control. In this trend, the impact of time delays introduced by signal transmission and processing in wide-area measurement system (WAMS) has to be considered. This paper firstly analyzes the time delay characteristics of WAMS, and then presents a detailed overview of power system modeling, stability analysis and control considering the time delay in measurement and communication system. It is pointed out that common power system stability analysis approaches combined with the state estimation methods considering time delay effects have practical applications. It is also presented that the quantitative analysis of time delay performances of power system, integrated modeling of information and power networks, the state estimation considering time delay effects and wide-area stability control should be studied systematically. At last, some promising aspects on time delay power system stability analysis and wide-area control are presented.