摘要
随着新能源的大规模开发利用,其在能源结构中的占比不断提高。为了维持大电网的平稳运行,要求双馈风机等新能源机组参与电网调频。双馈风机的转子侧变流器存在容量限制,而调频过程中转子电流变化可能会超出此限。为应对这一问题,首先分析了双馈风力发电机的数学模型,并得出了额定转速下dq系的转子电流控制模型;然后使用误差转化函数与李雅普诺夫方法,设计了限制转子电流的控制器,并与常规的虚拟同步控制相结合,提出了一种改进的虚拟同步控制策略,可以兼顾风机调频的需求与调频动态过程中转子电流的限制。通过仿真验证了所提出控制器参与电网调频的能力以及对于转子电流的良好控制。
With the rapid development and high penetration of renewable energy,it is becoming more important that renewable generators,including doubly-fed induction generator(DFIG),participate in the frequency regulation of the power grid.However,the rotor-side converter(RSC)of DFIGs usually had relatively small current limitations,which could be exceeded during frequency regulation.A novel rotor current performance-guaranteed virtual synchronous controller for DFIGs was proposed.Firstly,the DFIG model was analyzed and a current control model was developed.Then,using an error transformation function and Lyapunov synthesis,a performance-guaranteed controller was proposed to strictly guarantee the rotor current within the predefined bounds.Thus the proposed controller could well deal with the frequency regulation demand and the current limitation.Finally,the effectiveness of the controller was verified via simulations.The enhanced rotor current control effect brought by performance-guaranteed control was also examined.
作者
霍现旭
陈培育
徐科
丁一
吴莉萍
李秉昀
杨秦敏
HUO Xianxu;CHEN Peiyu;XU Ke;DING Yi;WU Liping;LI Bingyun;YANG Qinmin(Electric Power Research Institute of State Grid Tianjin Electric Company,Tianjin 300384,China;State Grid Tianjin Electric Company,Tianjin 300310,China;College of Control Science and Engineering,Zhejiang University,Hangzhou 310027,China)
出处
《电机与控制应用》
2018年第9期83-88,96,共7页
Electric machines & control application
基金
国家自然科学基金项目(61673347)
国网天津市电力公司科技项目(SGTJDK00DWJS170040)
关键词
双馈风机
转子侧变流器
虚拟同步控制
转子电流
保性能控制
doubly-fed induction generator(DFIG)
rotor-side converter(RSC)
virtual synchronous control
rotor current
performance-guaranteed control
作者简介
霍现旭(1986—),男,博士,高级工程师,研究方向为新能源并网与检测技术、电力电子化电力系统、智能配用电技术;杨秦敏(1979—),男,博士,教授,博士生导师,研究方向为自适应控制理论、新能源技术(风力发电)、智能电网。
