基于储能控制的低频振荡抑制方法及作用机理  

LFO Damping Method and Mechanism Analysis Based on Energy Storage System

作　　者：党杰 石梦璇 梁辰 徐友平 孙海顺[2] DANG Jie;SHI Mengxuan;LIANG Chen;XU Youping;SUN Haishun(Central China Branch of SGCC,Wuhan 430077,China;State Key Laboratory of Advanced Electromagnetic Engineering and Technology,Huazhong University of Science and Technology,Wuhan 430074,China)

机构地区：[1]国家电网有限公司华中分部,武汉430077 [2]华中科技大学强电磁工程与新技术国家重点实验室,武汉430074

出　　处：《高电压技术》2019年第12期4029-4037,共9页High Voltage Engineering

摘　　要：为深入分析储能装置抑制系统低频振荡的作用机理,建立了含储能的单机无穷大系统线性化数学模型,利用阻尼转矩分析法和特征值分析法,分析了有功功率调制的储能稳定控制(P-control)和无功功率调制的储能稳定控制(Q-control)的作用路径及作用机理,并与常规电力系统稳定器(PSS)进行对比。分析结果表明,在改变励磁增益、发电机功角以及线路阻抗变化等情况下,P-control的机电模式阻尼比均保持在较高水平;相比Q-control和传统的PSS,P-control具有更大的稳定运行区间。通过MATLAB/Simulink时域仿真,验证了分析结论的准确性。In order to analyze the mechanism of how an energy storage system(ESS)to damp the low frequency oscillation(LFO),a linear mathematical model of a single machine infinite bus system(SMIS)with ESS is established.Based on the damping torque analysis and the eigenvalue analysis method,the damping performances,as well as the functional route of active power controlled ESS(P-control)and reactive power controlled ESS(Q-control),are analyzed and compared with those of the conventional power system stabilizer(PSS).The analysis result shows that the damping ratio of the electromechanical mode under P-control maintains at a higher level under the conditions of increasing the excitation gain,varying the generator power angle,and changing the line impedance.Compared with Q-control and PSS,P-control has a larger stable range.The accuracy of the conclusion is verified by time domain simulation with MATLAB/Simulink.

关 键 词：储能系统 低频振荡 阻尼控制 阻尼转矩分析 机电模式 储能稳定控制 

分 类 号：TM7[电气工程—电力系统及自动化]