CAJ | 학술논문

提出一种基于比例谐振控制和重复控制相结合的三相光伏并网逆变器新型控制策略。在静止坐标系下，实现交流量的无静差控制，同时有效抑制输出电流中的周期性扰动，优化输出电流波形。该方法消除了传统的旋转坐标系下 dq轴电流控制路径上的耦合问题，也避免了多谐振控制策略中的相位滞后及谐振控制器之间相互影响等问题。在一台17kW光伏并网逆变器样机上进行了实验验证，实验结果表明该控制策略能够有效提高输出波形质量，实现逆变器无静差稳定运行。
제출일충기우비례해진공제화중복공제상결합적삼상광복병망역변기신형공제책략。재정지좌표계하，실현교류량적무정차공제，동시유효억제수출전류중적주기성우동，우화수출전류파형。해방법소제료전통적선전좌표계하 dq축전류공제로경상적우합문제，야피면료다해진공제책략중적상위체후급해진공제기지간상호영향등문제。재일태17kW광복병망역변기양궤상진행료실험험증，실험결과표명해공제책략능구유효제고수출파형질량，실현역변기무정차은정운행。
A novel control strategy applied in photovoltaic (PV) three-phase grid-connected inverter was proposed in this paper based on proportional-resonant (PR) control and repetitive control (RC). The new control method can realize the AC current tracking without steady error and depress the periodic disturbances to improve the quality of output current in stationary frame. Not only this control strategy eliminates the coupling problem existing in the current control method in the traditional synchronous frame, but avoids the phase delay and interaction in the multi-resonant controller. Experiments on a 17 kW PV grid-connected inverter prototype have been taken, and the results verified that the proposed control method effectively enhanced the quality of output current, realized the stable running of the inverter with zero steady state error.