Load Imbalance Degree Range of Single-phase Two-stage Cascaded H-bridge Rectifier

ZHENG Zheng; LI Qiusi; QIAO Meiying

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Load Imbalance Degree Range of Single-phase Two-stage Cascaded H-bridge Rectifier

更新时间：2025-12-08

- Load Imbalance Degree Range of Single-phase Two-stage Cascaded H-bridge Rectifier
- Vol. 45, Issue 3, Pages: 846-854(2019)
- 作者机构：
  
  河南理工大学电气工程与自动化学院
- 作者简介：
- 基金信息：
- DOI：
  CLC：
- Published Online：14 March 2019，
  
  Published：2019
- 稿件说明：
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ZHENG Zheng, LI Qiusi, QIAO Meiying. Load Imbalance Degree Range of Single-phase Two-stage Cascaded H-bridge Rectifier[J]. 2019, 45(3): 846-854.
DOI：

ZHENG Zheng, LI Qiusi, QIAO Meiying. Load Imbalance Degree Range of Single-phase Two-stage Cascaded H-bridge Rectifier[J]. 2019, 45(3): 846-854. DOI：

摘要

级联H桥整流器在实际运行中会因负载不平衡产生直流母线电容电压不平衡问题。针对负载不平衡下直流母线电压平衡问题

提出了直流母线参考电压范围内的负载不平衡限制范围。为减小锁相环给系统控制带来的复杂性

采用无锁相环控制结构。通过深入研究二维调制控制算法

推导出两桥调制波电压波形。然后根据功率平衡原则推导出系统稳定运行在单位功率因数下的负载不平衡限制范围

同时给出了直流母线参考电压选取范围。仿真和实验结果验证了所提出的直流侧电压选取范围与负载不平衡限制范围的有效性与可行性

对级联H桥整流器系统参数设计提供了有重要依据。

Abstract

Due to load imbalance

the dc-link capacitor voltage imbalance problem will occur in the actual operation of cascaded H-bridge rectifier. To solve the problem of dc-link voltage balance under unbalanced load

we put forward the range of load imbalance within the dc-link reference voltage. In order to reduce the complexity of the phase-locked loop to the system control

the lockless loop control structure is adopted. Through in-depth study of the two-dimensional control algorithm

the voltage waveform of two-bridge modulation wave is deduced. Then

according to the principle of power balance

the load unbalance limit range is deduced when the system is under unit power factor. Meanwhile

the reference range of dc-link voltage is given. The simulation and experiment results have verified the validity and effectiveness of dc-link reference voltage selection range and the load imbalance limit range

which provides an important basis for the design of cascaded H-bridge rectifier system parameters.

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