Transient Energy Transfer Mechanism and Current Limiting Dissipation Strategy in Wind Power Delivery via Hybrid Modular Multilevel Converter

Shuai CAO; Wang XIANG; Xiaojun LU; Weixing LIN; Jinyu WEN

doi:10.7500/AEPS20191122007

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Transient Energy Transfer Mechanism and Current Limiting Dissipation Strategy in Wind Power Delivery via Hybrid Modular Multilevel Converter

Application Research | 更新时间：2025-06-16

- Transient Energy Transfer Mechanism and Current Limiting Dissipation Strategy in Wind Power Delivery via Hybrid Modular Multilevel Converter
- Automation of Electric Power Systems Vol. 44, Issue 14, Pages: 121-129(2020)
- 作者机构：
  
  1. 强电磁工程与新技术国家重点实验室，华中科技大学，湖北省武汉市 430074
  2. 南洋理工大学能源研究所，新加坡 639798
  3. 思克莱德大学电气与电子工程学院，格拉斯哥市 G1 1XW，英国
  4. 特变电工新疆新能源股份有限公司，新疆维吾尔自治区乌鲁木齐市 830011
- 作者简介：
- 基金信息：
- DOI：10.7500/AEPS20191122007
  CLC：
- Received：22 November 2019，
  
  Revised：2020-03-16，
  
  Published Online：02 July 2020，
  
  Published：25 July 2020
- 稿件说明：
移动端阅览
曹帅,向往,鲁晓军等.风电经混合型MMC外送的暂态能量转移机理与限流耗散策略[J].电力系统自动化,2020,44(14):121-129.

CAO Shuai,XIANG Wang,LU Xiaojun,et al.Transient Energy Transfer Mechanism and Current Limiting Dissipation Strategy in Wind Power Delivery via Hybrid Modular Multilevel Converter[J].Automation of Electric Power Systems,2020,44(14):121-129.
曹帅,向往,鲁晓军等.风电经混合型MMC外送的暂态能量转移机理与限流耗散策略[J].电力系统自动化,2020,44(14):121-129. DOI： 10.7500/AEPS20191122007.

CAO Shuai,XIANG Wang,LU Xiaojun,et al.Transient Energy Transfer Mechanism and Current Limiting Dissipation Strategy in Wind Power Delivery via Hybrid Modular Multilevel Converter[J].Automation of Electric Power Systems,2020,44(14):121-129. DOI： 10.7500/AEPS20191122007.

摘要

混合型模块化多电平换流器(MMC)具有交直流解耦控制、抑制故障电流、维持并网电压等独特优势，在基于模块化多电平换流器的风电并网系统中具有广阔的应用前景。已有基于混合型MMC的交直流故障穿越策略大多仅考虑直流电网本体，并未结合风电并网考虑暂态能量转移与耗散的问题。首先，研究了基于混合型MMC的风电并网系统在交直流故障期间的暂态发展过程，归纳出能量转移机理，分析了不同故障阶段的关键因素。然后，提出了一种具备故障识别能力的自动限流耗散方法，研究了加入限流耗散措施后的暂态能量转移变化。最后，在四端风电直流电网下验证了自动限流控制及耗散方法的有效性。

Abstract

Hybrid modular multilevel converter (MMC) has broad application prospects in wind power integration systems based on MMC for its unique advantages of AC/DC decoupling control

fault current suppression

and maintenance of voltage at integration point. Most of the AC/DC fault ride-through strategies based on hybrid MMC only consider the DC power grid

but exclude the transient energy transfer and dissipation problems in wind power integration systems. Firstly

the transient development processes of wind power integration system based on hybrid MMC during AC/DC faults are studied. Energy transfer mechanism and key factors of different fault stages are summarized. Then

an automatic current limiting control with braking resistors (ACLC-BR) method is proposed

which has the ability of fault identification. The change of transient energy transfer with the current limiting dissipation control is studied. Finally

the effectiveness of the ACLC-BR and dissipation method is verified in the four-terminal DC wind power grid.

关键词

Keywords

references

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