CAJ | 학술논문

在分析四象限级联型变频器功率单元数学模型的基础上,以输入和输出瞬时有功功率平衡为控制目标,给出了PWM整流电流指令.为保证各频率电流的准确跟踪,提出了复矢量PI(complex vector PI,CVPI)调节器,实现了各频率电流的完全解耦控制,论证了CVPI调节器相比传统调节器,对谐振频率变化具有更好的鲁棒性.同时,建立了基于卡尔曼(Kalman)滤波的直流母线输出电流辨识模型,实时地辨识电流大小及其频率.构建了功率单元实验平台,对所提控制策略的正确性与可行性进行了实验验证.
재분석사상한급련형변빈기공솔단원수학모형적기출상,이수입화수출순시유공공솔평형위공제목표,급출료PWM정류전류지령.위보증각빈솔전류적준학근종,제출료복시량PI(complex vector PI,CVPI)조절기,실현료각빈솔전류적완전해우공제,론증료CVPI조절기상비전통조절기,대해진빈솔변화구유경호적로봉성.동시,건립료기우잡이만(Kalman)려파적직류모선수출전류변식모형,실시지변식전류대소급기빈솔.구건료공솔단원실험평태,대소제공제책략적정학성여가행성진행료실험험증.
Based on the mathematical model of power cells in four-quadrant cascade converters, a current control strategy for PWM rectifier was proposed with the control target being the balance of the input and output instantaneous power. The complex vector PI (CVPI) regulators were introduced to track various frequency currents and decoupled control completely. CVPI regulators were proved to have better robustness than traditional regulators with the resonant frequency change. Moreover, the DC bus output current model based on Kalman filter was established to identify the current magnitude and frequency in real time. The proposed control strategy was validated by the experimental results based on the platform of power cells.