基于自适应模型预测的风电场低压穿越控制机制研究  

Research on low voltage ride through control mechanism of wind farm based on adaptive model prediction

作　　者：解梅[1] 贾育培[1] 侯金秀[1] 付波[2] 龚梦 Xie Mei;Jia Yupei;Hou Jinxiu;Fu Bo;Gong Meng(China Electric Power Research Institute,Beijing 100000,China;School of Electrical & Electronic Engineering,Hubei University of Technology,Wuhan 430068,China)

机构地区：[1]中国电力科学研究院,北京100000 [2]湖北工业大学电气与电子工程学院,湖北武汉430068

出　　处：《可再生能源》2019年第8期1152-1158,共7页Renewable Energy Resources

基　　金：国家电网公司总部科技项目(DZ-18-25);国家自然科学基金(51309094)

摘　　要：风电场并网需满足并网导则的电压要求,双馈型风电场的无功功率输出主要来源于风力发电机网侧换流器、风力发电机定子和静态同步补偿器,因此在风电并网过程中,特别是低压穿越过程中,须要调节三者的无功功率输出,来保证风力发电机并网的可靠性。文章在建立无功功率调节方式数学模型的基础上,实现低压穿越过程中3种无功补偿方法的协同参与,并利用自适应模型控制风力发电机的定子。此外,根据电压的跌落情况,确定风力发电机网侧换流器和静态同步补偿器的无功功率输出,进而确定风力发电机定子控制过程中的最优化跟踪目标函数,以实现多种无功功率调节方式的协同参与。最后,利用风电场单机等值模型仿真结果对自适应模型预测方法进行验证。分析结果表明,相比于传统模型预测控制方法,采用自适应模型预测控制方法后,风电场静态同步补偿器的输出功率减小了14%。Wind farm integration needs to meet the voltage requirements of the grid connection guide.The reactive output of the doubly-fed wind farm mainly comes from the fan network side converter,fan stator and static synchronous compensator(STATCOM).Therefore,in the process of wind power integration,especially in the low-voltage ride through process,it is necessary to adjust the reactive output of the three to ensure the grid-connected reliability of the wind turbine.Based on the mathematical model of reactive power regulation,this paper realizes the cooperative participation of three reactive power compensation methods in the process of low-voltage traversal.It is proposed to control the fan stator through adaptive model predictive control;At the same time,according to the depth of the voltage drop,determine the reactive output of the grid-side converter and static synchronous compensator,and then determine the objective function of the optimal tracking of the fan stator control,so as to achieve the synergistic participation of multiple reactive power adjustment modes.Finally,the adaptive model prediction method is validated by wind farm single machine equivalent model simulation.The results show that the output of the model predictive control method is reduced by 14%compared with the wind farm static synchronous compensator using the traditional model predictive control method.

关 键 词：低压穿越 自适应控制 模型预测控制 无功补偿 

分 类 号：TK89[动力工程及工程热物理—流体机械及工程] TM31[电气工程—电机]