动态无功电压控制对频率振荡的影响及附加阻尼控制  

Effect of Dynamic Reactive Power-Voltage Control on Frequency Oscillation and Supplementary Damping Control

作　　者：李小菊 李青兰 詹航 司萌 陈磊[2] 闵勇[2] LI Xiaoju;LI Qinglan;ZHAN Hang;SI Meng;CHEN Lei;MIN Yong(State Grid Chongqing Electric Power Research Institute,Chongqing 401121,China;Department of Electrical Engineering,Tsinghua University,Beijing 100084,China)

机构地区：[1]国网重庆市电力公司电力科学研究院,重庆401121 [2]清华大学电机工程与应用电子技术系,北京100084

出　　处：《南方电网技术》2021年第6期71-77,共7页Southern Power System Technology

基　　金：国家自然科学基金项目(51922061);国网重庆市电力公司电力科学研究院科技项目(2020渝电科技1#)。

摘　　要：频率振荡属于电力系统有功频率控制过程的小扰动稳定问题。具有电压调节效应的负荷使得无功电压控制和有功频率控制产生耦合,因此动态无功电压控制设备也可以对频率振荡产生影响。分析了动态无功电压控制设备通过附加控制产生频率振荡阻尼转矩的原理和过程,提出了附加阻尼控制策略。对于采用电力电子接口的快速无功控制设备,在原有无功电压控制环节中附加以系统频率偏差为输入的比例环节,即可为频率振荡提供正阻尼。提出了系统中不同位置无功电压控制设备对频率振荡影响大小的评估方法,应选择影响大的设备进行附加阻尼控制。所提方法在新英格兰10机39节点系统和某实际电网中进行了仿真验证。Frequency oscillation belongs to the small disturbance stabilization problem of the active power-frequency(P-F)control process of the power system.The load with voltage regulation effect makes the reactive power-voltage(Q-V)control and P-F control coupled,so the dynamic Q-V control devices can also affect the frequency oscillation.The mechanism and process of dynamic Q-V control devices producing positive damping torque for frequency oscillation through supplementary control are analyzed.Strategy of supplementary damping control is proposed.For fast Q-V control devices with power electronic interface,a proportional link that takes the system frequency deviation as an input is added to the original Q-V control link to provide positive damping for frequency oscillation.A method for evaluating the effect of Q-V control devices at different positions on frequency oscillation is proposed.Selecting QV control devices with large effect for supplementary damping control can more effectively increase the frequency oscillation damping.The proposed method is verified with simulations in the New England 10-machine 39-bus system and an actual power system.

关 键 词：频率振荡 无功电压控制 动态无功补偿 阻尼控制 电压调节效应 

分 类 号：TM743[电气工程—电力系统及自动化]