大区电网互联对电力系统动态稳定性的影响

The Impact of Regional Power Grid Interconnection on the Dynamic Stability of Power Systems

随着中国电力工业的不断发展,电网规模不断扩大,大区电网互联已成为未来中国电网发展的一种趋势。由于大区电网之间存在着大量的电气联系,当大区电网发生故障时,很容易造成不同地区间的电力系统振荡。因此,如何有效地控制大区电网之间的相互影响成为一个十分重要的课题。本文介绍了大区电网互联对电力系统动态稳定性的影响,通过仿真分析了系统阻尼特性和元件参数对大区电网间的相互影响,并提出了一种简单有效的大区电网互联控制策略,该策略能有效地控制不同区域间电力系统的相互影响,并能较好地改善电力系统动态稳定性。在电力系统中,以区域互联的形式实现电网互联是在电力需求和电力系统现代化的基础上实现电力系统运行的一种方式。本文分析了动态稳定的特点和低频振荡的原因,并提出了互联网系统动态稳定管理的策略。

With the continuous development of China’s power industry and the expansion of power grid scale,the interconnection of large regional power grids has become a trend for the future development of China’s power grid.Due to the large number of electrical connections between regional grids,when a fault occurs in a regional grid,it is easy to cause power system oscillations between different regions.Therefore,how to effectively control the interaction between regional grids has become a very important issue.In this paper,we introduce the influence of interconnection of regional grids on the dynamic stability of power system,analyze the system damping characteristics and component parameters on the mutual influence between regional grids through simulation,and propose a simple and effective control strategy for interconnection of regional grids,which can effectively control the mutual influence of power system between different regions and improve the dynamic stability of power system better.In power systems,grid interconnection in the form of regional interconnection is a way to realize power system operation on the basis of power demand and power system modernization.In this paper,we analyze the characteristics of dynamic stability and the causes of low-frequency oscillations,and propose a strategy for dynamic stability management of the Internet system.