| 引用本文: | 高铁峰,仲宙宇,张 森,赵剑锋.基于单周期控制的三相三电平PFC整流器中点电压平衡方法[J].电力自动化设备,2016,36(7): |
| GAO Tiefeng,ZHONG Zhouyu,ZHANG Sen,ZHAO Jianfeng.Neutral-point voltage balancing based on one-cycle control for three-phase three-level PFC rectifier[J].Electric Power Automation Equipment,2016,36(7): |
|
| 摘要: |
| 基于扩展状态空间平均法，建立了三相三电平功率因数校正（PFC）整流器的动态模型，详细分析了直流侧中点电压不平衡的原因，推导了影响中点电压的零序占空比表达式。在此基础上，提出一种改进单周期控制方法，该方法在单个积分周期内引入零序占空比前馈补偿和中点电压反馈控制，具有较强的中点电压平衡能力，以及较好的稳态和动态特性。仿真及硬件平台实验验证了理论分析的正确性和有效性。 |
| 关键词: 功率因数校正 整流器 中点电压平衡 单周期控制 前馈补偿 反馈控制 |
| DOI： |
| 分类号: |
| 基金项目:江苏省科技支撑研究项目（SBE201300580） |
|
| Neutral-point voltage balancing based on one-cycle control for three-phase three-level PFC rectifier |
|
GAO Tiefeng, ZHONG Zhouyu, ZHANG Sen, ZHAO Jianfeng
|
|
School of Electrical Engineering，Southeast University，Nanjing 210096，China
|
| Abstract: |
| A dynamic model of three-phase three-level PFC （Power Factor Correction） rectifier is developed based on the generalized state space averaging method. The cause of neutral-point voltage imbalance is studied and the expression of zero-sequence duty ratio is derived，which influences the neutral-point voltage. A modified OCC （One-Cycle Control） is proposed，which introduces the feedforward compensation of zero-sequence duty ratio and the feedback control of neutral-point voltage in single integral cycle，resulting in the enhanced neutral-point voltage balancing capability and the better steady-state and transient perfor-mances. Simulative and experimental results validate the correctness and effectiveness of theoretical analysis. |
| Key words: power factor correction electric rectifiers neutral-point voltage balancing one-cycle control feedforward compensation feedback control |
