中国电机工程学报2016，Vol.36Issue(4)：1075-1089,1191,16.DOI:10.13334/j.0258-8013.pcsee.2016.04.022
考虑锁相环影响的LCL型并网变换器电流环控制器参数设计
Design of LCL-type Grid-connected Converter Current Loop Controller Parameters Considering Effects of Phase Locked Loops
摘要
Abstract
Wind farms are usually at the end of the grid, grid port voltage fluctuations will cause varying degrees of phase locked loop (PLL) transient response, so that the grid system cannot render the expected control performance, even leads to instability. Considering the impact of PLL transient characteristics and line parameters on high-power direct drive wind power system converters with LCL filter current control performances, in this paper a current loop PI controller parameter design method based on the multi-objective function was proposed. Firstly, a precise static model of grid-connected current control systems is established. Based on this, by analyzing the amplitude margin, the phase margin and the static errors of the system response characteristics, the PI controller parameter ranges meeting the above requirements had been achieved. Subsequently, a transient grid-connected current control system model affected by phase locked loop performance was established, furthermore the existing PI parameters value interval was optimized to obtain a better performance of the controller parameter combinations. Finally, 1.5MW LCL type grid-connected converter simulation results and 10kW experimental platform verification showed that, this method can improve both the static and dynamic responses of the current control and adaptability to the grid environment.关键词
LCL型并网变换器/PI控制器/多目标函数/线路参数/锁相环Key words
LCL-type grid-connected converter/PI controller/multi-objective function/line parameters/phase locked loop分类
信息技术与安全科学引用本文复制引用
周诗颖,邹旭东,童力,朱东海,高晓璐,赵迎迎,康勇..考虑锁相环影响的LCL型并网变换器电流环控制器参数设计[J].中国电机工程学报,2016,36(4):1075-1089,1191,16.基金项目
国家自然科学基金项目(51477064) （51477064）
国家重点基础研究发展计划项目(973计划)(2012CB215100). Project Supported by National Natural Science Foundation of China (51477064) （973计划）
The National Basic Research Program of China (973 Program) (2012CB215100). （973 Program）
