摘要
该文以单相脉冲宽度调制整流器为研究对象,以实现无网侧电压传感器控制为研究目的,提出一种基于模型参考自适应(model reference adaptive system,MRAS)的网压估算方法。首先,根据MRAS的基本原理,分别建立参考模型和可调模型中系统有功、无功功率数学模型,从而实现电网电压基波幅值、频率及角度的三角函数的估算。在此基础上,结合基于功率前馈解耦直接功率控制,给出基于MRAS的无网压传感器控制方法。然后,针对该方法对网侧电感参数敏感性问题,给出一种电感参数在线辨识算法。同时,针对控制系统启动问题,给出系统参数初始化设计方案。最后,对所提方法进行计算机仿真和实验验证,通过仿真和实验结果验证该方法的正确性和有效性。
In order to realize gird voltage sensorless control, a grid voltage estimation method with model reference adaptive system(MRAS) for single-phase pulse width modulation(PWM) rectifiers was proposed. Firstly, according to the basic principle of MRAS, the mathematical expressions of active and reactive powers in reference model and adjustable model were modeled, then the amplitude, frequency and angle triangular function of the fundamental component in grid voltage can be estimated. With the combination of the gird voltage estimation method and direct power control scheme with power feedforward decoupling, the grid voltage sensorless control strategy with MRAS was presented. Secondly, in order to tackle the AC-side inductance sensitivity of the proposed scheme, an inductance on-line estimation method was presented. Simultaneously, a system parameter initialization method was given to solve the startup problem of control system. Finally, the proposed scheme was verified in computer simulations and experimental tests, the simulation and experimental results have verified the correctness and validity of the proposed scheme.
作者
刘碧
冯晓云
邓睿
夏文婧
宋文胜
LIU Bi;FENG Xiaoyun;DENG Rui;XIA Wenjing;SONG Wensheng(School of Electrical Engineering,Southwest Jiaotong University,Chengdu 610031,Sichuan Province,China)
出处
《中国电机工程学报》
EI
CSCD
北大核心
2019年第20期6065-6074,共10页
Proceedings of the CSEE
基金
国家重点研发计划项目(2017YFB1200900)~~
关键词
单相脉冲整流器
无网压传感器
模型参考自适应
电网电压估算
直接功率控制
电感参数估算
single-phase pulse width modulation(PWM) rectifiers
grid voltage sensorless
model reference adaptive system(MRAS)
grid voltage estimation
direct power control
inductance estimation
