传统四象限级联型逆变器由多个四象限电压胞组成,需要大量电量传感器及滤波电感,造成系统体积和成本显著增加。该文提出一种四象限级联型逆变器的新型简化结构,将基于虚拟磁链直接功率控制策略(virtual-flux-linkage direct power contr...传统四象限级联型逆变器由多个四象限电压胞组成,需要大量电量传感器及滤波电感,造成系统体积和成本显著增加。该文提出一种四象限级联型逆变器的新型简化结构,将基于虚拟磁链直接功率控制策略(virtual-flux-linkage direct power control strategy,VF-DPC)的PWM整流器与传统H桥逆变器相结合,引入虚拟磁链的概念并用于计算瞬时有功和无功功率,无需检测输入变压器二次侧输出电压,省去了交流电压传感器,并避免计算输入电流的微分;通过适当提高变压器感抗以起到滤波作用,从而取代了电压胞输入端滤波电感。所提出的简化结构具有体积小,有效降低传感器数量,抗干扰能力强,能量自由双向传递,输入、输出电流谐波含量较低等优点。仿真和实验结果证明了该新型简化结构及其控制策略的正确性和可行性。展开更多
Linear switch reluctance machine(LSRM)has been tried to act as an alternative generator for direct drive linear wave energy converter(WEC).Many researchers have proposed new topologies of LSRM to improve the power den...Linear switch reluctance machine(LSRM)has been tried to act as an alternative generator for direct drive linear wave energy converter(WEC).Many researchers have proposed new topologies of LSRM to improve the power density,efficiency and reliability.However,the control methods for LSRM applied in direct drive WEC have been paid little attention,especially control methods considering the wave energy generator operating characteristics.In this paper,according to the generator control requirements of the direct drive WEC,force control algorithm for LSRM operating in four quadrants without a speed closed loop is put forward.The force ripple of LSRM is suppressed using force sharing function method.The four-quadrant control is easy to realize requiring only phase currents information.Simulation results validate the proposed method and indicate that LSRM is able to be used as the generator for direct drive WEC.展开更多
文摘传统四象限级联型逆变器由多个四象限电压胞组成,需要大量电量传感器及滤波电感,造成系统体积和成本显著增加。该文提出一种四象限级联型逆变器的新型简化结构,将基于虚拟磁链直接功率控制策略(virtual-flux-linkage direct power control strategy,VF-DPC)的PWM整流器与传统H桥逆变器相结合,引入虚拟磁链的概念并用于计算瞬时有功和无功功率,无需检测输入变压器二次侧输出电压,省去了交流电压传感器,并避免计算输入电流的微分;通过适当提高变压器感抗以起到滤波作用,从而取代了电压胞输入端滤波电感。所提出的简化结构具有体积小,有效降低传感器数量,抗干扰能力强,能量自由双向传递,输入、输出电流谐波含量较低等优点。仿真和实验结果证明了该新型简化结构及其控制策略的正确性和可行性。
基金This work was supported in part by the National Natural Science Foundation of China under Grant U1806224,61733010in part by the Guangdong Key Research and Development Program under Grant 2019B090917001.
文摘Linear switch reluctance machine(LSRM)has been tried to act as an alternative generator for direct drive linear wave energy converter(WEC).Many researchers have proposed new topologies of LSRM to improve the power density,efficiency and reliability.However,the control methods for LSRM applied in direct drive WEC have been paid little attention,especially control methods considering the wave energy generator operating characteristics.In this paper,according to the generator control requirements of the direct drive WEC,force control algorithm for LSRM operating in four quadrants without a speed closed loop is put forward.The force ripple of LSRM is suppressed using force sharing function method.The four-quadrant control is easy to realize requiring only phase currents information.Simulation results validate the proposed method and indicate that LSRM is able to be used as the generator for direct drive WEC.
