交错并联Boost功率校正技术的研究

Research on power calibration technique of interleaved parallel Boost

非线性电力电子装置在电网工作的过程中产生大量谐波并导致功率因数降低,大功率PFC（power factor correction）变换器开关器件电流应力高,开关损耗大,热设计困难。针对此问题,在传统单相Boost PFC变换器的基础上,提出一种采用多单元交错并联技术来进行功率因数校正的交错并联PFC电路拓扑。在电路的控制策略方面详细叙述了平均电流控制法的原理,并在此基础上提出一种带前馈的改进算法。最后在MATLAB/Simulink环境下对此电路拓扑进行建模仿真。仿真结果表明,该拓扑可以较好的校正功率因数,且降低了电流纹波,提高了系统工作稳定性。

Nonlinear power electronic devices in the process of grid work generate lots of harmonics and lead to lower power factor,high power PFC（ power factor correction） converter switch current stress high switching loss, thermal design difficulties. On the basis of the traditional single phase PFC Boost converter,a parallel PFC circuit topology is proposed,which is based on the parallel connection of power factor correction. The principle of the average current control method is described in detail in the control strategy of the circuit,and an improved algorithm based on the proposed algorithm is presented. Finally,the circuit topology is modeled and simulated in MATLAB/Simulink environment. The simulation results show that the proposed topology can correct the power factor,and reduce the current ripple,and improve the stability of the system.