CAJ | 학술논문

提出一种应用于单个光伏组件的软开关交错反激并网逆变器拓扑及其软开关控制策略。针对反激变压器漏感问题，提出漏感能量吸收回馈电路，实现了漏感能量吸收再利用，并实现了开关管漏源电压的钳位，提高了变换效率同时降低了开关管关断电压尖峰；提出基于数字处理器的反激变换器变开关频率谐振软开关控制策略，实现了开关管的零电压开通，同时改善了逆变器的电磁兼容特性；提出的交错并联反激逆变器有助于减小变压器和滤波器的体积，提高功率密度。详细分析变换器的工作原理，分析变开关频率谐振软开关控制方式的原理和实现条件，最后进行实验验证。
제출일충응용우단개광복조건적연개관교착반격병망역변기탁복급기연개관공제책략。침대반격변압기루감문제，제출루감능량흡수회궤전로，실현료루감능량흡수재이용，병실현료개관관루원전압적겸위，제고료변환효솔동시강저료개관관관단전압첨봉；제출기우수자처리기적반격변환기변개관빈솔해진연개관공제책략，실현료개관관적령전압개통，동시개선료역변기적전자겸용특성；제출적교착병련반격역변기유조우감소변압기화려파기적체적，제고공솔밀도。상세분석변환기적공작원리，분석변개관빈솔해진연개관공제방식적원리화실현조건，최후진행실험험증。
A soft-switching grid-connected PV inverter topology with its soft-switching algorithm was proposed. Leak inductance energy is recovered and the drain-source voltage of the main switch is clamped with the help of the leak inductance energy recovery circuit to improve the conversion efficiency and eliminate the switch-off voltage spike of the main switch. A DSP-based resonant soft-switching algorithm with variable switching frequency was proposed to achieve zero voltage switching （ZVS） turning-on of the main switch and improve the electromagnetic interference （EMI） performance of the inverter. The interleaved flyback topology reduces the volume of the transformer and filtering inductor, and improves the power density of the inverter. In-depth analysis was given on the inverter principles and the principle and criteria of variable resonant soft-switching algorithm. Finally, experimental results were given.