CAJ | 학술논문

为了获得低THD入网电流，采用输出滤波器来滤除谐波。LCL滤波并网逆变器为三阶系统，可以有效抑制入网电流中高次谐波电流，但同时又带来谐振问题。针对目前国内外LCL滤波并网逆变器的控制方法，从谐振抑制效果、动态响应两个方面进行对比，得出综合效果最优的控制策略。为了验证理论分析的正确性，在PSIM 9.0中搭建仿真模型进行实验验证。研究结果表明，电容电流、入网电流双闭环的直接电流控制策略具有谐振抑制能力强、动态响应好的优点。
위료획득저THD입망전류，채용수출려파기래려제해파。LCL려파병망역변기위삼계계통，가이유효억제입망전류중고차해파전류，단동시우대래해진문제。침대목전국내외LCL려파병망역변기적공제방법，종해진억제효과、동태향응량개방면진행대비，득출종합효과최우적공제책략。위료험증이론분석적정학성，재PSIM 9.0중탑건방진모형진행실험험증。연구결과표명，전용전류、입망전류쌍폐배적직접전류공제책략구유해진억제능력강、동태향응호적우점。
In order to obtain low THD current, the output filter has been used to filter the harmonic. LCL filter is a three-order system which can not only effectively restrain high harmonic current of network, but al-so cause resonance problems. This article makes a comparison among the LCL grid-connected inverter control methods in both dynamic response and resonance suppression, in order to reach an optimal control strategy. Finally, build a simulation in order to verify the correctness of the analysis. Research shows that double closed-loop control strategy of network and capacity current has a strong resonance suppression ability and a good dynamic response characteristic.