基于直流互联的交流电网频率稳定控制研究  

Frequency Stability Control Research of AC Grid Based on HVDC Transmission System

作　　者：孙凯祺[1] 李可军[1] Sundaresh Lakshmi 刘奕路[2] 潘久平 孙华东 SUN Kaiqi;LI Kejun;SUNDARESH Lakshmi;Yilu LIU;PAN Jiuping;SUN Huadong(School of Electrical Engineering,Shandong University,Jinan 250061,Shandong Province,China;The Department of Electrical Engineering and Computer Science,the University of Tennessee-Knoxville,Knoxville 37996,Tennessee,United States;ABB Corporate Research,Raleigh 27606,North Carolina,United States;China Electric Power Research Institute,Haidian District,Beijing 100192,China)

机构地区：[1]山东大学电气工程学院,山东省济南市250061 [2]田纳西大学诺克斯维尔分校电气工程与计算机科学学院,田纳西州诺克斯维尔37996 [3]ABB北美研发中心,北卡罗来纳州罗利27606 [4]中国电力科学研究院有限公司,北京市海淀区100192

出　　处：《中国电机工程学报》2020年第3期723-730,共8页Proceedings of the CSEE

基　　金：国家自然科学基金项目(51777116);国家电网公司科技项目(PDB17201700161)~~

摘　　要：直流互联交流电网已经成为解决大电网互联问题的一种有效手段。互联交流电网的直流联络线可以实现区域备用互补,提高电网运行经济效益,并改善电网受到扰动后的频率波动情况。该文基于直流联络线控制提出一种用于互联交流电网频率支援及恢复策略。该策略可以实现事故时的紧急功率控制,减小交流电网事故后的频率急剧下降和波动。同时,在事故后参与到电网恢复过程,起到保障电网在安全频率范围内运行和加速电网频率恢复的作用。最后,通过仿真软件PSCAD/EMTDC进行仿真验证,结果表明所提策略充分利用了直流调频能力,提高了互联电网的经济性和稳定性。Interconnecting AC grids with HVDC transmission system has become a promising solution for solving the issues of large grid interconnection.Sharing frequency response reserves through HVDC transmission system among the asynchronous power systems is expected to improve the economics of grid operation and the frequency recovery against critical disturbances.In this paper,a novel frequency response control strategy for HVDC link was proposed.The HVDC transmission system will take part in the primary frequency control to provide fast emergency power support to stabilize the system frequency and help the system to establish a secure settling frequency.The HVDC transmission system will also participate in the secondary frequency control for returning the system to the nominal operation frequency.Simulation results show that the proposed control is effectiveness and have good performance.

关 键 词：直流互联 交流电网 频率稳定控制 一次调频控制 二次调频控制 

分 类 号：TM73[电气工程—电力系统及自动化]