Study on DC/DC Converter for ISOP Topology

YAO Weizheng; XIN Defeng; GAN Jianghua; AN Yu; ZHANG Hailong

doi:10.13296/j.1001-1609.hva.2020.01.016

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Study on DC/DC Converter for ISOP Topology

更新时间：2025-04-26

- Study on DC/DC Converter for ISOP Topology
- High VoltageApparatus Vol. 56, Issue 1, Pages: 104-113(2020)
- 作者机构：
  
  1. 许继集团有限公司
  2. 西安许继电力电子技术有限公司
- 作者简介：
- 基金信息：
- DOI：10.13296/j.1001-1609.hva.2020.01.016
  CLC： TM46
- Published：2020
- 稿件说明：
移动端阅览
[1]姚为正,辛德锋,甘江华,安昱,张海龙.适用于ISOP拓扑的DC/DC变换器研究[J].高压电器,2020,56(01):104-113.

YAO Weizheng, XIN Defeng, GAN Jianghua, et al. Study on DC/DC Converter for ISOP Topology[J]. High voltageapparatus, 2020, 56(1): 104-113.
[1]姚为正,辛德锋,甘江华,安昱,张海龙.适用于ISOP拓扑的DC/DC变换器研究[J].高压电器,2020,56(01):104-113. DOI： 10.13296/j.1001-1609.hva.2020.01.016.

YAO Weizheng, XIN Defeng, GAN Jianghua, et al. Study on DC/DC Converter for ISOP Topology[J]. High voltageapparatus, 2020, 56(1): 104-113. DOI： 10.13296/j.1001-1609.hva.2020.01.016.

摘要

在交直流混合微电网和电力电子变压器等领域

由于电压较高、功率较大

通常采用ISOP拓扑进行能量的双向传递

本文研究适用于ISOP拓扑的双向LLC谐振DC/DC变换器

采用H桥2个桥臂驱动脉冲移相的方式

解决变换器预充电电流过冲的问题;对于组成ISOP拓扑的变换器之间的移相特性进行了分析与计算

对ISOP拓扑双向传输能量的均压及均流特性进行了分析与设计;采用均压电阻实现ISOP拓扑串联侧的稳态均压

并对双向LLC谐振DC/DC变换器的谐振网络进行了分析与计算;最后研制出由20个双向LLC谐振变换器组成的ISOP拓扑

对文中提出的设计方法进行验证

试验证实变换器移相启动过程中无电流过冲、并实现了基准桥臂的ZVS和移相桥臂的ZCS或者准ZCS

而且变换器组成ISOP拓扑的动态和静态的均压均流满足要求。

Abstract

In the fields of AC/DC hybrid microgrid and power electronic transformers

the ISOP topology is usuallyadopted for bi-directional power transmission becuse of the high voltage and the large power. Bidirectional LLC reso-nant DC/DC converter which is suitable for the topology of ISOP is studied in this paper. Using the way of shifting thedriving-pulse of H-bridge’s two leg

this paper solves the problem of over-current in the starting time. For ISOP topol-ogy of multiple converters

the features of phase shifting is analyzed. The characters of voltage-sharing and current-sharing are analyzed and designed for ISOP topology when the bidirectional power flowing. The steady-state voltage-sharing of ISOP topology is realized by equalizing resistances. The resonant network of the DC/DC converter is dis-cussed and calculated. Finally twenty converters of ISOP topology are developed to verifying the analysis method pro-posed in this paper. In the process of starting experimental research confirms no over-current and the DC/DC convert-ers can realize ZVS and near ZCS. The voltage-sharing and current-sharing of the DC/DC converters of ISOP topologymeet the design requirements when the converters are in starting and operating.

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