摘要
提出一种用于三相并网逆变器的控制算法,称为比例谐振(PR)解耦控制器。该控制器在两相静止坐标系下实现,控制方程式包括比例项、谐振项、解耦项及电网电压前馈项。谐振项作为普通谐振控制器的改进,能使所提出的控制器具有无静差的稳态性能,并且以一个二阶离散状态方程,替代了传统谐振控制所需的两个二阶差分方程,更易于在实时数字处理系统中实现。解耦项是矢量控制中有功、无功电流解耦控制功能在静止坐标系下的实现。最后通过实验验证了该控制器的优良性能。
A controller named as proportion resonant（PR） decouple for three-phase grid-connected inverters is pre- sented.It is implemented in two-phase static frame and includes four items：proportion,resonant,decouple and gird voltage feedforward.The resonance item,as an improvement of classical resonant controller,makes the proposed controller no static difference, and replaces two second order deference equations by a second order discrete state equation which is more feasible in practical digital signal processing system.The decouple item in stationary frame realizes independent regulation of active and reactive current, which is the same as vector control.Experimental results show that the proposed algorithm has good performance.
出处
《电力电子技术》
CSCD
北大核心
2013年第4期14-16,共3页
Power Electronics
关键词
控制器
比例谐振
解耦
逆变器
controller
proportion resonant
decouple
inverter
