互联系统交流联络线随机功率波动分析(二)：原因分析与改进措施  

Analysis on Stochastic Power Fluctuations of AC Tie-lines Between Interconnected Power Systems Part Two Cause Analysis and Measures

作　　者：鄢发齐[1] 徐玮[1] 何毅斌[1] 李晓红[1] 陈磊[2,3] 胡伟[2,3] 

机构地区：[1]国家电网公司华中分部,湖北省武汉市430077 [2]清华大学电机工程与应用电子技术系,北京市100084 [3]电力系统及发电设备控制和仿真国家重点实验室,清华大学,北京市100084

出　　处：《电力系统自动化》2013年第14期32-37,共6页Automation of Electric Power Systems

摘　　要：频域分析与自相关系数分析表明:两大区互联系统交流联络线的随机功率波动中存在较为突出的周期在110s左右的分量。文中建立了反映实际自动发电控制(AGC)系统运行原理的机理模型,通过模拟互联系统联络线功率控制过程,一方面通过仿真结果分析揭示了该分量明显偏大的原因,另一方面全面深入认识了AGC系统对联络线功率波动的作用与影响。在此基础上,提出了通过AGC控制参数优化提高交流联络线功率控制效果的措施———调整区域控制偏差(ACE)滤波时间常数和减小控制延时,并对此进行了仿真验证。研究成果有利于提高大区互联系统联络线功率控制水平。Frequency domain analysis and autocorrelation coefficient analysis show that the component with a period about 110 s is prominent in the stochastic power fluctuations of AC tie-lines between two large interconnected power systems. The mechanism model reflecting the operation principles of the actual automatic generation control （AGC） system is constructed to simulate the process of tie-line power control. The cause of the prominent component is revealed by simulation result analysis, and the effect of AGC on the power fluctuations of tie-lines is comprehensively analyzed. Based on the analysis, measures to improve the tie-line power control by optimizing the parameters of AGC systems are proposed. This is achieved by adjusting the filtering time constant of area control error （ACE） as well as reducing the control delay. The approach is verified by simulations. The results are helpful for better control of tie-line power.

关 键 词：互联系统 联络线 随机功率波动 自动发电控制 延时 

分 类 号：TM76[电气工程—电力系统及自动化]