摘要
为了去除电解电容,提高变换器寿命,提出一种串联型功率解耦无电解电容功率因数校正(power factor correction,PFC)拓扑,选择单相全桥逆变电路串联在Boost型PFC电路与负载之间作为解耦电路。根据电压补偿与功率解耦的原理,针对该解耦电路提出一种电压补偿开环控制策略,该方法对负载变化不敏感,提高了系统的稳定性和可靠性,且开关器件承受较低电压值,无需电流采样环节,减小了变换器的体积和成本。为了进一步提高电路输入电流质量,提出适用于解耦电路的闭环控制策略,仿真结果表明,闭环控制较电压补偿开环控制策略,可优化输入电流质量,减少谐波污染,但是在成本与复杂程度上高于开环控制策略。最后,对提出的串联型解耦电路拓扑与电压补偿型的开环及闭环控制策略进行实验验证,实验结果证明了理论的正确性。
In order to remove the electrolytic capacitor and improve the life of the converter, a new series-type power decoupling PFC topology without electrolytic capacitor was proposed. The single-phase full-bridge inverter circuit was selected in series between the Boost-type PFC circuit and the load as a decoupling circuit. According to the principle of voltage compensation and power decoupling, a new voltage compensation open-loop control strategy was proposed for the decoupling circuit. This method is not sensitive to load changes, which improves the stability and reliability of the system. The switching device in the circuit is subjected to a lower voltage value, and the current sampling step is not required in the circuit, which reduces the size and cost of the converter. In order to further improve the input current quality of the circuit, a closed-loop control strategy suitable for the decoupling circuit was proposed. The simulation results show that the closed-loop control can optimize the input current quality and reduce the harmonic pollution, but compared with the voltage compensation open-loop control strategy, the cost and the complexity is higher than the open loop control strategy. Finally, the open-loop and closed-loop control strategies of series-type decoupling circuit were experimentally verified. The experimental results prove the correctness of the theory.
作者
王立乔
王海旭
崔舒敏
沈虹
WANG Liqiao;WANG Haixu;CUI Shumin;SHEN Hong(Key Lab of P ower Electronics for Energy Conservation and Motor Drive of Hebei Province(Yanshan University),Qinhuangdao 066004,Hebei Province,China)
出处
《中国电机工程学报》
EI
CSCD
北大核心
2019年第17期5195-5204,共10页
Proceedings of the CSEE
基金
国家自然科学基金项目(51677162)
河北省自然科学基金项目(E2017203235,E2016203156)~~
关键词
无电解电容
Boost型PFC电路
功率解耦
单相全桥逆变电路
电压补偿控制策略
non-electrolytic capacitor
Boost type PFC circuit
power decoupling
single-phase full-bridge inverter circuit
voltage compensation control strategy
