一种快速正交分量构造的单相并网逆变器控制  

A Control Strategy of Single-phase Grid Connected Inverters With Fast Orthogonal Component Construction

作　　者：戴瑞海 朱磊 卫炜 刁瑞盛[2] DAI Rui-hai;ZHU Lei;WEI Wei;DIAO Rui-sheng(State Grid Hangzhou Xiaoshan District Power Supply Co.,Ltd.,Hangzhou 312200,China;不详)

机构地区：[1]国网杭州市萧山区供电公司,浙江杭州312200 [2]浙江大学,浙江工杭州312200

出　　处：《电力电子技术》2024年第6期110-113,135,共5页Power Electronics

基　　金：浙江省自然科学基金(LZ14E070001)。

摘　　要：针对单相LCL型并网逆变器控制系统存在网侧电流跟踪性能差的问题,这里提出基于解耦双同步参考坐标系(DDSRF)的单相网侧电流正交分量构造方法,得到直流形式的网侧正负序电流d,q轴分量,并在正负序d,q坐标系下用比例积分(PI)控制器构建电流控制环路,以实现网侧电流无差跟踪。首先介绍所提DDSRF快速构造网侧电流正交分量的工作原理。其次,分析各电流控制环路PI控制器参数的设计方法。最后,在5 kW单相LCL型并网逆变器硬件平台进行实验验证,实验结果证明了所提控制系统的正确性。The single-phase LCL grid connected inverter control system has the problem of poor grid connected current tracking performance.A method for constructing the orthogonal components of single-phase grid side current based on the decoupled dual synchronous reference frame(DDSRF)is proposed.The positive and negative sequence current d,q components of the grid side in direct current form is constructed.Grid current control loops using proportional integral(PI)controllers in the positive and negative sequence d,q coordinate system to achieve zero error tracking of the grid side current are pointed out.Firstly,the working principle of the proposed DDSRF for quickly constructing orthogonal components of grid side current is introduced.Secondly,the design of PI controller parameters for each current control loop is analyzed.Finally,experimental verification is conducted on the hardware platform of a 5 kw single-phase LCL grid connected inverter,and the correctness of the proposed control system is verified by the experimental results.

关 键 词：并网逆变器 解耦双同步参考坐标系 正交分量构造 

分 类 号：TM464[电气工程—电器]