摘要
提出了一种基于电压前馈控制的民用光伏并网逆变器不定向穿越控制策略,对并网逆变器的有功输出及无功补偿控制进行了研究。基于电压前馈控制,该策略能够在电网电压发生不定向突变的瞬间,对由比例积分(PI)闭环控制延时和功率平衡原则等原因造成的并网电流突变进行抑制,实现对电网电压的瞬时跟踪;结合对并网逆变器有功输出及无功补偿控制的研究,该策略能按需实现对有功输出及无功补偿的动态调节。通过模拟电网电压不定向突变进行实验,验证了该策略的可行性和有效性。
A non-directional ride-through control strategy of household photovohaic grid-connected inverter based on voltage feed-forward control is proposed and the research on the active power output and reactive power compensation is carried.Based on voltage feed-forward control,this strategy enables instantaneous tracking of grid voltage to be achieved and suppresses sudden grid current change caused by proportional integral（PI） closed-loop control delay and power balance principle when sudden and non-directional change of grid voltage occurs.Combing research on the active power output and reactive power compensation, this strategy is able to achieve dynamic adjustment of active power output and reactive power compensation according to needs.The feasibility and effectiveness of this strategy is verified by the experiment in which non-directional sudden change of grid voltage is simulated.
出处
《电力电子技术》
CSCD
北大核心
2018年第3期32-35,39,共5页
Power Electronics
关键词
逆变器
不定向穿越
电压前馈
inverter
non-directional ride-through
voltage feed-forward
