【摘要】 针对单相非隔离光伏并网逆变器在无功补偿时存在着并网电流在电网电压过零点处畸变的问题,提出一种新的调制策略,即工频开关管在正功部分采用有功调制,而在负功部分采用单极性调制,能较好地解决过零点畸变的问题。通过实验验证了该方法的有效件.并能满足VDE-AR-N4105认证要求。更多还原

【Abstract】 Aiming at the problem of current distortion al zero crossing when compensating ihe reactive power in singlephase transformerless inverter for grid-connected photovoltaic systems,a new modulation strategy is proposed in which the line-frequency switches uses active and unipolar modulation in positive and negative power respectively.The effectiveness of the proposed method is verified by experiment,and the results meet the standard VDE-AR-N4105.更多还原