CAJ | 학술논문

针对三相电压型PWM变流器控制系统，提出一种自然坐标与负载功率前馈控制方法。根据p-q理论在自然坐标下的表征，引入瞬时有功电压和瞬时无功电压的概念。从而基于电网电压定向的矢量控制策略引入 PWM变流器的自然坐标控制方法，省去了电网相位检测和坐标系变换，降低控制复杂度。针对PWM变流器矢量控制下直流侧负载(包括有源负载和无源负载)功率波动对直流侧电压产生较大冲击和波动问题，基于功率平衡和 p-q理论推导了负载扰动点到三相交流电流指令的前馈通道增益矩阵，提高PWM变流器直流侧稳压控制的鲁棒性。RCP实验证明所提方法的正确性和可行性。
침대삼상전압형PWM변류기공제계통，제출일충자연좌표여부재공솔전궤공제방법。근거p-q이론재자연좌표하적표정，인입순시유공전압화순시무공전압적개념。종이기우전망전압정향적시량공제책략인입 PWM변류기적자연좌표공제방법，성거료전망상위검측화좌표계변환，강저공제복잡도。침대PWM변류기시량공제하직류측부재(포괄유원부재화무원부재)공솔파동대직류측전압산생교대충격화파동문제，기우공솔평형화 p-q이론추도료부재우동점도삼상교류전류지령적전궤통도증익구진，제고PWM변류기직류측은압공제적로봉성。RCP실험증명소제방법적정학성화가행성。
A new control strategy for three-phase voltage-source pulse width modulation (PWM) converter which is based on natural coordinate (abc coordinate) and power feedforward is presented. According to thep-q theory in natural coordinate, the concept of instantaneous active and reactive voltage is presented. Then the natural coordinate control method of PWM converter is combined with vector control strategy based on grid voltage orientation to reduce the control complexity, which saves grid phase detection and eliminates coordinate transformation. It puts forward a load power feedforward method to reduce the impact of load (including active and passive load) power fluctuation on DC voltage of PWM converter. Feedforward gain matrix is deduced from load disturbance to three-phase AC current instruction based on the power balance and thep-q theory, improving the robustness of the PWM converter DC voltage control. RCP experiment results show the correctness and feasibility of the above-mentioned method.