【摘要】 静止坐标系下的比例谐振控制因其具有对特定频率响应速度快、不存在耦合项并易实现谐波补偿这三个显著特点得到了广泛的关注,并被应用于多种分布式发电系统当中。本文对静止坐标系下的比例谐振控制进行了说明与分析,同时针对比例谐振控制的特点,提出了一种带有比例系数的正序网压前馈控制方法。该方法通过引入正序网压前馈环节,相比传统的比例谐振控制方法进一步提高了系统的动态响应能力,在逆变器公用接入点(PCC)电压畸变的情况下,正序网压前馈环节降低了网压畸变对并网电流造成的负面影响,并得到了实验的验证。更多还原

【Abstract】 Nowadays,all kinds of distributed generation(DG) systems are developed rapidly.Grid connected inverter as one of the most important parts in the DG system,its controller are always the investigated focus.In order to improve the connected current and the response of the controller,stationary reference frame control strategy with proportional resonant(PR) controller due to its high dynamic and good harmonic compensation performance characteristics is widely used in many different DG applications.This paper proposes a new additional proportional resonant control method with positive sequence grid voltage feed-forward.By using this method,both the quality of grid connected current and the dynamic performance are improved,which also validated by experiments.更多还原