三段式频率偏差系数及其在互联电网调频中的应用  

Three-stage Frequency Bias Coefficient and Its Application in Frequency Control of Interconnected Power System

作　　者：文丽[1] 王坚[2] 陈明辉[1] 文福拴[3] 

机构地区：[1]华南理工大学电力学院,广东省广州市510640 [2]中国南方电网电力调度通信中心,广东省广州市510623 [3]浙江大学电气工程学院,浙江省杭州市310027

出　　处：《电力系统自动化》2010年第19期59-63,共5页Automation of Electric Power Systems

基　　金："十一五"国家科技支撑计划资助项目(2008BAA13B10)~~

摘　　要：在互联电力系统频率控制中,一般采用固定系数法设置频率偏差系数B,这会导致自动发电控制(AGC)调节量不能准确跟踪系统功率偏差,甚至可能引起严重的频率过调或欠调,进而引起频率稳定问题。在此背景下,基于电力系统中火电、水电通常设置不同的一次调频死区,提出了三段式B系数方法,能够更好地反映系统的调节性能,进而更准确地跟踪系统功率偏差。以南方互联电力系统为实例,通过仿真与调频试验分析,验证了所提出的三段式B系数能够有效减少频率偏差现象,改善互联电力系统调频控制性能,提高频率质量。In the frequency control of interconnected power systems,the fixed coefficient method is generally employed to set the frequency bias coefficient B. In this methodological framework,the automatic generation control （AGC） regulating quantity cannot accurately track the system power bias,and as a result the frequency overshoot/undershoot and even frequency stability could be severe issues. Given this background and considering the fact that different setting values of the primary frequency control dead zones are employed in thermal units and hydro units,a three-stage B-coefficient method is presented,with an objective of obtaining a better system regulation performance and more accurately tracking system power bias. China Southern Power Grid is employed to demonstrate the developed method by simulation studies and on-site testing,and it is shown by both simulation and on-site results that the three-stage B-coefficient method could significantly reduce the frequency overshoot/undershoot problem,improve the frequency quality as well as the frequency control performance of interconnected power systems.

关 键 词：互联电力系统 频率控制 频率偏差系数 三段式 

分 类 号：TM76[电气工程—电力系统及自动化]