摘要
提出一种基于准比例谐振控制和重复控制相结合的三相光伏并网逆变器复合控制策略。在两相静止坐标系下,实现交流量的无静差控制,同时有效抑制输出电流中的周期性扰动,优化输出电流波形,避免多谐振控制策略中的相位滞后及谐振控制器之间相互影响等问题。在一台17 k W光伏并网逆变器样机上进行实验验证,结果表明该控制策略能有效抵抗周期性电网扰动,实现逆变器无静差稳定运行。
A novel quasi proportional resonant control strategy applied in photovohaic three-phase grid-connected inverter was proposed in this paper based on quasi resonant control and repetitive control. The new control method can realize the AC current tracking without steady error and depress the periodic grid disturbances to improve the quality of output current in synchronous frame, avoids the phase delay and interaction in the multi-resonant controller. Experiments on a 17 kW PV grid-connected inverter prototype have been taken, and the results verified that the proposed control method effectively enhanced the quality of output current, effectively suppressed the total harmonic distortion realized the stable running of the inverter with zero steady state error.
出处
《太阳能学报》
EI
CAS
CSCD
北大核心
2016年第5期1190-1196,共7页
Acta Energiae Solaris Sinica
基金
浙江省公益技术应用研究(2016C31055)
华北科技学院河北省矿井灾害防治重点实验室开放研究(KJZH2014KO7)
浙江省教育厅科研计划(Y201533965)
关键词
光伏并网逆变器
准比例谐振控制
电流波形畸变
周期性电网扰动
grid-connected inverter
quasi proportional resonant control strategy
total harmonic distortion （THD）
periodic grid disturbance
