摘要
针对比例复数积分(PCI)控制方法在离散化过程中易使跟踪频率发生偏移的问题,提出一种新的控制方法,在PCI控制的基础上加入截止频率和积分控制——准比例复数积分-积分(QPCII)控制。在三相静止坐标系上准比例复数积分(QPCI)控制实现电网谐波抑制,在两相旋转坐标系上积分控制有效消除静差。通过Matlab/Simulink进行建模仿真,并与PCI控制方法进行对比,仿真结果表明该控制策略具有更高的稳定性和谐波抑制能力,实现了交流信号的无静差跟踪,证明了控制策略的可行性,使逆变系统达到良好的控制效果。
In view that the proportional complex integral(PCI)control method is easy to make the tracking frequency offset in the discretization process,a new control method is proposed,in which the cutoff frequency and integral control are added on the basis of the PCI control.It is called quasi-proportional complex integral-integral(QPCII)control.In the three-phase stationary coordinate system,the QPCI control is adopted to realize the harmonic suppression of the power grid.In the two-phase rotating coordinate system,the integral control can effectively eliminate the steady-state error.The modeling simulation was carried out by means of Matlab/Simulink and it was compared with the PCI control method.The simulation results show that the control strategy has high stability and good harmonic suppression ability,and can realize the zero steady-state error tracking of the AC signal,which prove the feasibility of the control strategy and make the inverter system achieve a good control effect.
作者
葛诗涵
李立生
姜仁卓
段金见
刘聪
GE Shihan;LI Lisheng;JIANG Renzhuo;DUAN Jinjian;LIU Cong(College of Electric and Electronic Engineering,Shandong University of Technology,Zibo 255000,China;Shandong Electric Power Research Institute of State Grid,Jinan 250003,China)
出处
《现代电子技术》
北大核心
2020年第23期103-106,111,共5页
Modern Electronics Technique
基金
山东省自然科学基金项目(ZR2017LEE021)
国网山东省电力公司科技项目(520626180061)。
关键词
并网逆变器
QPCI控制
谐波抑制
无静差跟踪
双闭环控制
建模仿真
grid-connected inverter
QPCI control
harmonic suppression
zero steady-state error tracking
double closed loop control
modeling simulation
