Prony 在电力系统稳定控制领域中的应用

电力工业发展促使互联电力系统的规模日益增大,网络结构日益复杂.特别是高压直流输电系统运行后,系统的性能有很大的改变.由于系统结构复杂,以及控制器的增加,以前的小扰动算法变得难以使用.特别是在设计阶段进行了参数计算,但加入实际系统后参数变化可能很大,并且由于多个控制器的加入也有可能造成系统的特性改变,尤其是引入负阻尼和由此带来的振荡,所以为了更好地改善系统阻尼和抑制区域间的功率振荡需要一种快速便捷的方法.本文通过对大量的文献资料总结,首先介绍了Prony方法的计算过程以及如何提高Prony 分析方法的准确性,然后通过与电力系统中已有算法的比较分析了Prony方法在电力系统中的适用性.最后介绍了Prony方法在电力系统控制领域的应用情况、面临的问题以及未来的发展趋势.

Prony and Its Application in the Control of Stable Region of Electric Power Systems

With the development of power systems,power network structures become very complicated.After the high voltage direct current(DC) transmission systems coming into operation,the overall systemic performance has changed dramatically.Especially the system would experience negative damping due to the great number of controllers involved.The existing algorithms,such as the small disturbance algorithm,are hardly applicable.Therefore,it is desirable to develop a fast and convenient method to improve system damping and restrain inter area oscillation.This paper firstly introduces the computational process of prony method and how to improve prony method accuracy based on a careful review of vast number of literature papers.Then it analyzes the applicability of the prony method in power systems by comparing prony method with the existing algorithms.Finally,it presents the applications of the prony method in the control of power systems,the problems faced now and future trend in forthcoming development.