多直驱永磁同步发电机并联风电场次同步阻尼控制器降阶设计方法  

A Reduced Order Design Method for Subsynchronous Damping Controller of Multi-PMSGs Parallel Wind Farm

作　　者：苏田宇 杜文娟 王海风 Su Tianyu;Du Wenjuan;Wang Haifeng(State Key Laboratory of Alternate Electric Power Systems with New Energy Resources,North China Electric Power University,Beijing 102206 China)

机构地区：[1]新能源电力系统国家重点实验室(华北电力大学),北京102206

出　　处：《电工技术学报》2019年第1期116-127,共12页Transactions of China Electrotechnical Society

基　　金：中央高校基本科研业务费专项资金资助项目(2017XS034;2018ZD01)

摘　　要：多直驱永磁同步发电机(PMSG)并联风电场并网电力系统中可能出现次同步振荡现象。为了保证系统稳定运行,提出了一种多PMSG并联风电场次同步阻尼控制器降阶设计方法。文中次同步阻尼控制器以风电场集中母线电压幅值为输入信号,并将输出信号分配到风电场中每台PMSG电网侧换流器控制回路上,次同步阻尼控制器参数在多PMSG并联风电场并网系统降阶模型的基础上由全局搜索算法优化得到。次同步阻尼控制器降阶设计方法可以降低状态矩阵维度,大大减少参数优化时间。最后,基于Matlab软件对20台PMSG并联风电场并网电力系统进行模态分析和非线性仿真分析,结果显示,降阶设计的风电场次同步阻尼控制器在不同场景下均能够抑制多PMSG并联风电场次同步振荡,提升系统的稳定性。Subsynchronous oscillations may occur in the power system connected with PMSG wind farms in parallel configuration.Therefore,a reduced order design method for subsynchronous damping controller of PMSG wind farms in parallel configuration is presented to ensure the safe and stable operation of the system.This subsynchronous damping controller takes the amplitude of the concentrated bus voltage of the wind farm as the input signal,while the output signal is allocated to the GSC control loops of each wind turbine in the PMSG wind farm.The damping control parameters are optimized by the global search algorithm on the basis of the reduced order model of the power system connected with PMSG wind farms in parallel configuration.This method can greatly reduce the dimension of the state matrix and reduce the optimization time.Based on Matlab software,modal analysis and nonlinear simulation analysis are carried out for a power system connected with a PMSG wind farm which consists of 20 wind turbines.The results of modal analysis and nonlinear simulation show that the subsynchronous damping controller of wind farm designed by the reduced order method can suppress the subsynchronous oscillations in different scenarios.

关 键 词：直驱永磁同步发电机 风电场 次同步阻尼控制器 降阶设计法 

分 类 号：TM614[电气工程—电力系统及自动化]