摘要
针对光伏并网逆变器的比例积分(PI)控制器存在稳态误差,抗电网干扰能力差的问题,提出了一种准比例谐振(PR)控制策略,利用其在谐振频率处增益无穷大的特点,消除稳态误差,提高抗干扰能力同时设计了准PR控制器的参数。仿真结果验证了所设计的准PR控制器能实现系统电流无误差跟踪,具备抗电网干扰能力。
The solar grid-connected inverter based on the proportional intergral （PI） controller had disadvantages of steady-state error and poor anti-jamming capability to the interference of the grid. This paper proposed a quasi-proportional resonant （PR） controller which makes use of the controller infinite gain in the resonance frequency and can eliminate the steady-state error and improve anti-jamming ability. The paper also designed the parameters of the controller. The simulation results show that the design of the quasi-PR controller can realize the system current accurate tracking and has the resistance to grid interference.
出处
《低压电器》
2012年第22期19-23,59,共6页
Low Voltage Apparatus
基金
2010年粤港关键领域重点突破招标项目(20100107-3)
关键词
单相并网逆变器
比例积分(PI)控制器
准比例谐振(PR)控制器
single phase grid-connected inverter
proportional intergral （PI） controller
quasi-proportional resonant （PR） controller
