摘要
传统的模型预测算法中给定值与实际值存在静态误差,这是由模型预测控制算法的基本原理决定的。针对该问题,首先该文基于内模原理推导了比例积分的补偿环节,并对模型预测电流控制中给定电流进行修正,实现给定值与实际值的无静差跟踪。其次,为了避免网压畸变对锁相环的相位检测造成影响,提出一种基于相位偏移补偿的电压信号检测方法,并将其用于模型预测电流控制算法。实验表明,所提补偿环节能改善模型预测的静态跟踪性能;相位检测方法能有效地检测网压基波相位信息,证明所提方法的正确性和有效性。
There is a static error between the given value and the actual value in the traditional model predictive control algorithm, which is determined by the basic principles of the algorithm itself. To solve this problem, the compensation part of PI based on the internal model principle is derived in this paper. And the given current is corrected to achieve the nonstatic error tracking of the given value and the actual value. Secondly, in order to avoid the impact of grid distortion on the phase detection of the phase-locked loop, a voltage signal detection method based on phase offset compensation is proposed. And then it is used in the model prediction current control algorithm. Finally, experiments show that the compensation part of PI can effectively improve the static tracking performance of model prediction and the phase detection method can effectively detect the fundamental information of grid voltage, which verifies the correctness and effectiveness of the proposed method.
作者
宋智威
黄路
熊成林
关振宏
SONG Zhiwei;HUANG Lu;XIONG Chenglin;GUAN Zhenhong(School of Electrical Engineering,Southwest Jiaotong University,Chengdu 610031,Sichuan Province,China)
出处
《电网技术》
EI
CSCD
北大核心
2020年第5期1845-1851,共7页
Power System Technology
基金
国家重点研发计划项目(2017YFB1200801-05)
教育部中央高校基本科研业务费专项资金项目(2682017CX045)。
关键词
单相脉冲整流器
PI补偿
静态误差
相位检测
single phase pulse rectifier
the compensation part of PI
static error
phase detection
