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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
作者:
作者单位:

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

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。

关键词:

基金项目:

国家重点研发计划资助项目(2018YFB0904600)。

通信作者:

向往(1990—),男,通信作者,博士,主要研究方向:模块化多电平换流器建模与控制、基于模块化多电平换流器的高压直流工程设计和直流电网运行与控制。E-mail:xiangwang1003@foxmail.com

作者简介:

曹帅(1995—),男,博士研究生,主要研究方向:模块化多电平换流器和直流电网。E-mail:caoshuaisgo@foxmail.com
鲁晓军(1990—),男,博士,现在博士后工作站进行研究,主要研究方向:柔性直流换流器建模和直流电网稳定性分析等。E-mail:luxiaojun@hust.edu.cn


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

1.State Key Laboratory of Advanced Electromagnetic Engineering and Technology, Huazhong University of Science and Technology, Wuhan 430074, China;2.Energy Research Institute of Nanyang Technological University, Singapore 639798;3.Department of Electronic and Electrical Engineering, University of Strathclyde, Glasgow, G1 1XW, UK;4.TBEA SunOasis Co., Ltd., Urumchi 830011, China

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.

Keywords:

Foundation:
This work is supported by National Key R&D Program of China (No. 2018YFB0904600).
引用本文
[1]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.
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  • 收稿日期:2019-11-22
  • 最后修改日期:2020-03-16
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  • 在线发布日期: 2020-07-20
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