组串式逆变器谐波抑制策略

摘要

光伏发电装机容量日益增大,研究光伏逆变器电能质量意义深远.本文分析了逆变器谐波产生机理,基于此从逆变器死区补偿及由于电网电压谐波引起并网电流谐波抑制两方面设计了控制策略,将所设计策略应用于组串式逆变器中.通过实验验证了本控制方法的有效性、可行性及优越性.%The ratio of electrical power produced by PV generation system in the whole power system keeps increasing continuously.So there is great value in researching power quality in PV distributed generation system.The mechanism of harmonic generation is analyzed in this paper.Based on that,dead-time compensation strategy and harmonic suppression strategy are designed,which are used in string inverter.The experiment result shows that the designed control strategy is feasibility and superiority.