摘要
针对无电解电容永磁电机变频系统母线侧采用小容值薄膜电容,导致母线电压产生大幅度波动、系统的输入功率因数难以满足实际应用的问题,提出一种高功率因数的无电解电容永磁电机变频系统逆变器电流控制策略。分析系统输入电流导通角和相位偏移角对输入功率因数的影响,结合输入电流导通角对逆变器电流进行控制,并采用带相位补偿的比例谐振控制器对系统延时进行补偿,其输出作为电机q轴电流给定。利用电网电流的间接微分量前馈补偿到电机q轴电流给定上,以提升逆变器电流控制效果并减少输入电流中的谐波含量。在无电解电容永磁压缩机变频实验平台上进行实验验证,实验结果表明,采用该策略能够显著提高系统的输入功率因数并减少谐波电流。
Aiming at the problems that for the electrolytic capacitor-less inverter system, the use of small capacitance film capacitor on the DC-link will lead to large fluctuation of voltage, and input power factor of the system is difficult to meet the requirements of practical applications, a high power factor inverter current control strategy is proposed. The influence of the conduction angle and phase offset angle of the input current on the power factor was analyzed. The conduction angle was used to control the inverter current. A proportional resonance controller with phase compensation was designed to compensate the system delay, whose output was given as the q-axis current. The indirect differential of the grid current was further used to feed forward compensation to the q-axis current, which can improve the current control effect of the inverter and decrease the current harmonics. The experimental verification was carried out on the platform of the electrolytic capacitor-less permanent magnet compressor drive system. The experimental results show that the inverter current control strategy can significantly improve the input power factor of the system and reduce the harmonic current.
作者
黄万奔
杨家强
邓鎔峰
古汤汤
卓森庆
HUANG Wan-ben;YANG Jia-qiang;DENG Rong-feng;GU Tang-tang;ZHUO Sen-qing(College of Electrical Engineering,Zhejiang University,Hangzhou 310027,China;Ningbo AUX Electrical Limited Company,Ningbo 315191,China)
出处
《电机与控制学报》
EI
CSCD
北大核心
2022年第8期1-10,共10页
Electric Machines and Control
基金
国家自然科学基金(51777191)
浙江省自然科学基金重点项目(LCZ19E070001)。
关键词
永磁电机
无电解电容
高功率因数
逆变器电流控制
电流谐波
前馈补偿
permanent magnet synchronous machine
electrolytic capacitor-less system
high power factor
inverter current control
current harmonics
feedforward compensation
