应用显式模型预测控制的永磁同步风电机组频率电压协同调节  

Cooperative Voltage and Frequency Regulation of Permanent Magnet Synchronous Wind Turbine Based on Explicit Model Predictive Control

作　　者：闫逸辰 寇鹏[1,2,3] 张远航 李华 李旭东 熊尉辰 梁得亮 YAN Yichen;KOU Peng;ZHANG Yuanhang;LI Hua;LI Xudong;XIONG Weichen;LIANG Deliang(School of Electrical Engineering,Xi’an Jiaotong University,Xi’an 710049,China;State Key Laboratory of Electrical Insulation and Power Equipment,Xi’an Jiaotong University,Xi’an 710049,China;Shaanxi Key Laboratory of Smart Grid,Xi’an Jiaotong University,Xi’an 710049,China;Power Research Institute of State Grid Shaanxi Electric Power Company Limited,Xi’an 710100,China)

机构地区：[1]西安交通大学电气工程学院,西安710049 [2]西安交通大学电工材料电气绝缘全国重点实验室,西安710049 [3]西安交通大学陕西省智能电网重点实验室,西安710049 [4]国网陕西省电力有限公司电力科学研究院,西安710100

出　　处：《西安交通大学学报》2024年第8期9-18,共10页Journal of Xi'an Jiaotong University

基　　金：国家自然科学基金资助项目(52077165);国网陕西省电力公司科技项目(5226KY220015)。

摘　　要：为解决高压直流输电线路发生闭锁故障引起送端近区功率冗余、造成频率和电压升高的问题,提出了一种面向频率电压协同调节的永磁同步风电机组的显式模型预测控制(EMPC)策略。该控制策略利用了直驱式永磁同步风力发电机组具有同时调节电网频率和电压的能力。根据频率摆动方程和电压灵敏度模型建立了换流站母线电压和电网频率的状态空间模型;将永磁同步风电机组的有功输出和无功输出相结合,利用多个EMPC控制器计算代价函数下的最优输出并进行组合,计算出故障后永磁同步风电机组的参考功率输出,以实现送端近区频率和电压的协同控制。在MATLAB/Simulink平台进行仿真验证表明:当闭锁故障发生时,EMPC控制策略不仅可以降低送端近区的频率和电压的峰值与稳态值,而且与其他控制方法相比,频率峰值降低了0.089 Hz,电压峰值降低了0.012(标幺值)。该研究可为电力系统的频率电压控制提供理论及工程参考。To solve the problem of power redundancy at the sending end caused by converter blocking on high-voltage direct current transmission lines,which results in frequency and voltage increases,this paper proposes an explicit model predictive control(EMPC)strategy for cooperative frequency and voltage regulation of permanent magnet synchronous wind turbines(PMSWTs).The control strategy takes advantage of the fact that PMSWTs have the ability to regulate the voltage of the converter station and grid frequency simultaneously at the sending end.First,the state space model of bus voltage and grid frequency at the converter station is established based on the frequency swing equation and voltage sensitivity model.Then,the active and reactive power outputs of the PMSWTs are combined,and multiple EMPC controllers are used to calculate the optimal outputs under the cost function,which are then combined to compute the reference power output of the PMSWTs after the converter blocking.Thus,the cooperative frequency and voltage regulation is achieved at the sending end.The simulation in MATLAB/Simulink shows that when the blocking occurs,the EMPC strategy reduces the peak and steady values of frequency and voltage at the sending end.Compared with other control methods,the proposed strategy reduces the peak frequency by 0.089 Hz and the peak voltage by 0.012 p.u..This research can offer theoretical and engineering insights for frequency and voltage control in power systems.

关 键 词：永磁同步电机 风力发电 频率控制 电压控制 显式模型预测控制 

分 类 号：TM341[电气工程—电机]