周锦荣1, 王辉2, 周小方1
(1.闽南师范大学 物理与信息工程学院,福建 漳州 363000;2.宁德师范学院 计算机系,福建 宁德 352100)
摘要: 针对传统的逆变器控制策略对交流信号跟踪出现的偏差问题,在准比例谐振控制器的双环控制基础上,提出输出有功功率和无功功率与输出电压相位和幅度解耦后的新型下垂控制算法。应用时变相量法建立并联系统的小信号模型,分析下垂系数的变化对系统稳定性和动态性能的影响。仿真实验结果表明,利用准比例谐振控制器和新型下垂控制策略能有效地实现单相逆变器并联控制。
关键词: 准比例谐振控制器; 双闭环并联控制; 下垂控制算法; 时变相量法; 小信号模型
中图分类号: TM 464 文献标志码: A
Parallel Operation of Single Phase Inverter Based on Modified PR Controller
ZHOU Jinrong1, WANG Hui2, ZHOU Xiaofang1
(1. College of Physics and Information Engineering, Minnan Normal University, Zhangzhou 363000, China;
2. Department of Computer, Ningde Normal University, Ningde 352100, China)
Abstract: In view of the traditional inverter control strategy of AC signal tracking deviation problem, we discussed proportional resonant controller for double loop control, and puts forward a new droop control algorithm based on the output′s active power, reactive power, the output voltage′s phase and amplitude of the decoupled model. A small signal model based on the timevarying phasor of this system is built for analyzing of droop coefficient on system stability and dynamic performance. The simulation results show that, using quasi proportional resonant controller and model droop control strategy can effectively realize the singlephase inverter parallel control.
Key words: proportional resonant controller; double loop and parallel operation controller; droop control algorithm; timevarying phasor; small signal model
收稿日期: 20140306
基金项目: 福建省教育厅科技研究资助项目(JB12144); 闽南师范大学教学改革研究项目(JG201216).
作者简介: 周锦荣(1974—),男,讲师.