摘要
针对三相并网逆变器采用无差拍电流预测控制时对滤波电感参数比较敏感的特点,提出一种电感在线辨识的电流预测控制方案。采用电网电压定向的矢量控制策略,将电网电压合成矢量定在d-q旋转坐标系d轴上,使d轴电流控制有功功率,q轴电流控制无功功率,实现了d轴和q轴电流的解耦控制。同时,将在线辩识的电感应用于三相并网逆变器无差拍电流预测控制系统。对有电感在线辨识控制策略进行实验。实验结果表明:电感在线辨识控制策略在静态和动态过程中能够准确地辨识电感的大小,从而验证方案的可行性和正确性。
A new inductance online identification is proposed due to the deadbeat predictive current control being sensitive to the filter inductance for three-phase grid-connected inverters.The vector control strategy of grid voltage orientation was used and the grid voltage synthetic vector was aligned with the d-axis in the d-q rotating reference frame,which realizes that the active power and the reactive power are independently controlled by the d-axis current and the q-axis current,and decoupling control for the d-axis current and the q-axis current.The value of inductance online identification was applied in the deadbeat predictive current control strategy for three-phase grid-connected inverters.At last,the control strategy was verified by experiments.The experimental results show that the value of inductance can be accurately identified in the static and dynamic process,which verifies the feasibility and correctness of the control strategy.
出处
《电机与控制学报》
EI
CSCD
北大核心
2011年第3期52-57,共6页
Electric Machines and Control
基金
上海市重点攻关项目(10KJD480004)
上海市节能减排科技支撑项目(09dz1202500)
关键词
三相并网逆变器
无差拍电流预测控制
电感在线辨识
电网电压定向
解耦控制
three-phase grid-connected inverters
deadbeat predictive current control
inductance online identification
grid voltage orientation
decoupling control
