基于宽频振荡稳定约束的风电接入容量分析  

Wind Power Penetration Capacity Analysis Based on Wide-Band Oscillation Constraint

作　　者：吴琛 刘威[2] 张丹 谢小荣[2] 黄伟 郑超 WU Chen;LIU Wei;ZHANG Dan;XIE Xiaorong;HUANG Wei;ZHENG Chao(Planning and Construction Research Center of Yunnan Power Grid Co.,Ltd.,Kunming 650011,China;Department of Electrical Engineering,Tsinghua University,Beijing 100084,China;Yunnan Electric Power Dispatching Center,Kunming 650011,China)

机构地区：[1]云南电网有限责任公司规划建设研究中心,昆明市650011 [2]清华大学电机工程与应用电子技术系,北京市100084 [3]云南电力调度控制中心,昆明市650011

出　　处：《电力建设》2023年第2期83-91,共9页Electric Power Construction

基　　金：国家自然科学基金项目(51925701,51537007);云南省重大科技专项计划(202002AF080001);云南电网有限责任公司科技项目(YNKJXM20210097)。

摘　　要：风电的大规模接入可能引发严重的宽频振荡。宽频振荡与风电场的容量、接入点阻抗以及机组的运行工况等密切相关。文章采用阻抗模型方法分析风电并网系统的宽频振荡特性,明确宽频振荡约束下的风电接入容量与电网阻抗之间的关系。首先,建立了风电机组的全工况阻抗模型,该模型以风电机组端口工频电压和输出电流为变量;然后,基于全工况阻抗模型分析了风电机组输出功率、接入点短路比等对风电并网系统宽频振荡的影响;进而,分析了风电场容量与接入点之间的关系,为风电场的建设和运行提供参考;最后,通过时域仿真验证了全工况阻抗模型分析结果的准确性。结果表明,基于全工况阻抗模型可以确定在不同电网条件下考虑宽频振荡稳定时风电场的最大接入容量。The large-scale penetration of wind power may cause serious wide-band oscillations. Wide-band oscillation is closely related to the capacity of the wind farm, the interface impedance, and the operating conditions of wind turbines generators(WTGs). In this paper, the impedance model method is adopted to analyze the wide-band oscillatory characteristics of the wind power system, so as to clarify the relationship between the penetration capacity of the wind farm and the grid impedance under the constraint of wide-band oscillation. Firstly, the full-operating-condition impedance model(FOCIM) of the WTG is established, which takes the voltage and output current at the terminal as variables. Then, on the basis of the FOCIM, the effects of output power and short-circuit ratio(SCR) on the wide-band oscillation are analyzed. Furthermore, how the practicable maximum capacity of the wind farm varies with the grid impedance is studied, which is of reference value for the construction and operation of the wind farm. Finally, the accuracy of the analysis results of the FOCIM is verified by time-domain simulations. The results show that the practicable maximum capacity of the wind farm considering the constraint of wide-band oscillation can be determined on the basis of the FOCIM under different grid conditions.

关 键 词：风电机组 宽频振荡 全工况阻抗模型 稳定性分析 短路比 

分 类 号：TM712[电气工程—电力系统及自动化]