CAJ | 학술논문

在光伏发电系统中，前级升压变换器多采用Boost变换器，传统电压控制方式存在动态响应速度慢，系统稳定性差的缺点，针对上述问题，对原电路连续工作下的两种工作状态进行小信号建模，然后通过仿真得到Bode图，根据bode图设计了该控制环路的反馈补偿网络。最后，仿真和实验验证了小信号模型和补偿网络的正确性和有效性。
재광복발전계통중，전급승압변환기다채용Boost변환기，전통전압공제방식존재동태향응속도만，계통은정성차적결점，침대상술문제，대원전로련속공작하적량충공작상태진행소신호건모，연후통과방진득도Bode도，근거bode도설계료해공제배로적반궤보상망락。최후，방진화실험험증료소신호모형화보상망락적정학성화유효성。
A modified droop approach in parallel-connected DC-DC converters based on the nonlinear control for Boost circuit was proposed to compensate the output voltage drop in droop approach. Three-loop control method and sliding mode control were adopted to compensate the decline of the output voltage in the control system and to regulate the output voltage according to the degree of decline. The randomly interleaved technique made the modules regulate the output voltage alternatively and improved the steady-state characteristic of the system. The currents were distributed by a certain ratio which improved the flexibility of the system. A better static and dynamic response characteristic were verified through simulation.