一种用于电力系统低频振荡抑制的新能源电站阻尼注入控制器设计及特性分析  

Damping Injection Controller of Renewable Energy for Power System Low Frequency Oscillation Mitigation and Its Dynamic Characteristics Analysis

作　　者：熊鸿韬 汪宗恒 尚磊 董旭柱 XIONG Hongtao;WANG Zongheng;SHANG Lei;DONG Xuzhu(E.Energy Technology Co.,Ltd.,Hangzhou 310000,Zhejiang Province,China;State Grid Zhejiang Electric Power Research Institute,Hangzhou 310000,Zhejiang Province,China;School of Electrical Engineering and Automation,Wuhan University,Wuhan 430072,Hubei Province,China)

机构地区：[1]杭州意能电力技术有限公司,浙江省杭州市310000 [2]国网浙江省电力有限公司电力科学研究院,浙江省杭州市310000 [3]武汉大学电气与自动化学院,湖北省武汉市430072

出　　处：《电网技术》2022年第7期2690-2698,共9页Power System Technology

基　　金：杭州意能电力技术有限公司科技项目(HZYN-2021-0014-308):“基于光伏、储能变流器的电网功率振荡抑制机理及新能源电力系统稳定器设计研究”。

摘　　要：提出了一种基于新能源电站本地阻尼注入的电力系统稳定器(power system stabilizer,PSS)。该稳定器设计的基本思想是通过检测新能源电站端口频率信息,构建调制其输出有功或端口电压的补偿控制,依据系统功率平衡的原理,从而间接调节同步机组电磁功率输出达到抑制系统低频振荡的目的。所提出的有功功率和电压的阻尼注入控制采用统一的“增益+滤波+相位补偿”结构,其中相位补偿环节仅补偿频率测量及滤波环节在低频振荡频段的相移,无须外部电网的信息。同时基于构建的两机系统的扩展Heffron-Phillips模型,通过阻尼转矩法分析说明了光伏电站与同步发电机不同电气距离及控制参数变化情形下所提控制器均能提供较好的阻尼。最后,在Matlab/Simulink中搭建了含高比例光伏发电的四机-两区系统的仿真模型,验证分析考虑不同光伏渗透率、光照强度、接入点等场景下,所提出有功和电压阻尼注入控制的正确性及有效性。This paper proposes a local damping injection method suitable for renewable energy power stations.The basic principle of the damping controller design is to construct a local active power or voltage versus frequency variation compensation modulation branch,so as to indirectly regulate the power output of synchronous generators(SGs)to mitigate power system low frequency oscillation.The proposed active power and voltage damping controller share a unified"gain+filtering+phase compensation"structure.The phase compensation only deals with the phase lag brought by frequency detection and filter links,so wide-area communication is unnecessary.Meanwhile,an extended Heffron-Phillips model including one solar station and an SG in parallel connected to an infinite bus system is built.Studies based on the damping torque analysis method show that the proposed controller exhibits good damping performance under a wide range variation of controller parameters and electrical distances.Last,a modified two-area-and-four-machine model with high shares of solar generations is built in the Matlab Simulink environment.The numerical analysis regards several scenarios,including different solar penetration,illumination intensity,access points,and so on,validating the effectiveness of the proposed control.

关 键 词：新能源发电 低频振荡 阻尼控制 阻尼转矩法 

分 类 号：TM721[电气工程—电力系统及自动化]