复杂扩展式电力系统功率频率动态过程分析

ANALYSIS OF POWER-FREQUENCY DYNAMICS IN LARGE SCALE MULTI-MACHINE POWER SYSTEMS

本文从理论分析和实际计算两方面对复杂扩展式电力系统(或称多大区互联系统)频率动态特性进行了较全面的研究。研究表明,迄今国内外研究电力系统功率——频率动态过程及低频减载装置整定计算的“单机模型”有很大局限性,复杂扩展式电力系统中频率的动态过程存在空间分布和时间分布的特性,并且网络结构、扰动地点、负荷构成及电压特性等因素都对频率动态过程有明显影响。

This paper discusses the designation of under frequency load shedding scheme in large scale multi-machine power systems according to the main characteristics of power-frequency dynamics. After a brief introduction of the usually used single-generator-to-load approach, the effect of some characteristcs of frequency dynamics in multi-machine power systems on the under frequency load shedding scheme is discussed, and the concept of load frequency regulationcoefficient is analysed. Then a general approach to de...