电气传动2019，Vol.49Issue(9)：26-30,5.DOI:10.19457/j.1001-2095.dqcd18868
基于电网电压正余弦变换的三相变流器控制策略
Control Strategy for Three-phase Grid-connected Converter Based on Sine and Cosine Transform of Grid Voltage
摘要
Abstract
The AC signal in the three-phase grid-connected converter system can be mapped to DC signal by the d-qsynchronous rotating coordinate system. Therefore,the classic PI controller can be used for tracking the AC signal. However,the angle of the grid-voltage vector used for dq transformation is usually provided by the phase-locked loop (PLL),and this will increase the complexity of the control system. Firstly,the sine and cosine values of the voltage vector angle were derived from the grid voltage components in the two-phase static coordinate system,and then the control strategy for three-phase grid-connected converter based on sine and cosine transform of grid voltage was proposed. The momentary values of the grid voltage was only as the input variables of the proposed method,which reduced the complexity of the control system greatly. Finally,the simulation model of the system was built,and the simulation results confirm the validity of the analysis and the proposed strategy.关键词
并网变流器/d-q坐标系/锁相环/电压矢量角/正余弦变换Key words
grid-connected converter /d-q coordinate system /phase locked loop /angle of the grid-voltage vector/sine and cosine transform分类
信息技术与安全科学引用本文复制引用
姜雅飞..基于电网电压正余弦变换的三相变流器控制策略[J].电气传动,2019,49(9):26-30,5.基金项目
江苏高校品牌专业建设工程资助项目(LJPP-15) （LJPP-15）
