CAJ | 학술논문

为提高并网系统的稳定性和获得高质量的并网电流，将简化的五电平逆变器拓扑电路应用于并网系统，采用T型滤波器滤波、电容电流内环，并网电流外环的双闭环控制提高系统稳定性。针对PI控制的特点，研究在减小稳态误差和实现单位功率因数并网的参数条件。所设计的系统综合了五电平逆变器拓扑电路、双闭环控制、PI控制的优点，仿真试验验证了该设计的合理性、有效性和可行性。
위제고병망계통적은정성화획득고질량적병망전류，장간화적오전평역변기탁복전로응용우병망계통，채용T형려파기려파、전용전류내배，병망전류외배적쌍폐배공제제고계통은정성。침대PI공제적특점，연구재감소은태오차화실현단위공솔인수병망적삼수조건。소설계적계통종합료오전평역변기탁복전로、쌍폐배공제、PI공제적우점，방진시험험증료해설계적합이성、유효성화가행성。
In order to improve the stability of the grid-connected system and get the high quality of the current, the simplified five level inverter is used with T type filter and double closed loops of the capacitor current inner loop and grid connected current outer loop to improve system stability. According to the characteristics of PI control, the parameters are studied on steady-state error reducing and unit power factor. The system combines the advantages of the five-level inverter,double closed loops and PI control. The simulation results show that the design is effective and feasible.