| 具备无闭锁穿越直流故障能力的直流自耦变压器 |
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| 引用本文： | 李梦柏,向往,左文平,姚良忠,林卫星,文劲宇.具备无闭锁穿越直流故障能力的直流自耦变压器[J].电力系统自动化,2018,42(4):82-88. |
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| 作者姓名： | 李梦柏 向往 左文平 姚良忠 林卫星 文劲宇 |
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| 作者单位： | 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,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,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,新能源与储能运行控制国家重点实验室(中国电力科学研究院有限公司), 北京市 100192,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; 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,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 |
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| 基金项目： | 国家电网公司科技项目(NYN17201600314)；中国博士后创新人才支持计划资助项目(BX201700088) |
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| 摘 要： | 首先,分析了目前直流自耦变压器技术的特点及其缺陷所在,针对目前直流自耦变压器无法穿越直流故障的问题,分析了直流自耦变压器穿越直流故障的需求,在其基础上结合混合型模块化多电平换流器的特点,设计了具备无闭锁可穿越直流故障的直流自耦变压器子模块数目配比。其次,设计了该变压器的控制策略,保证其在正常工况和故障工况下的稳定运行。最后,在PSCAD/EMTDC下搭建了测试系统,验证了所提无闭锁穿越直流故障直流自耦变压器技术的可行性及控制策略的有效性。
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| 关 键 词： | 直流—直流转换 直流自耦变压器 高压直流变压器 直流故障 控制策略 |
| 收稿时间： | 2017/9/12 0:00:00 |
| 修稿时间： | 2018/1/12 0:00:00 |
DC-DC Autotransformer with Uninterrupted Operating Capability During DC Fault |
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| LI Mengbo,XIANG Wang,ZUO Wenping,YAO Liangzhong,LIN Weixing and WEN Jinyu.DC-DC Autotransformer with Uninterrupted Operating Capability During DC Fault[J].Automation of Electric Power Systems,2018,42(4):82-88. |
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| Authors: | LI Mengbo XIANG Wang ZUO Wenping YAO Liangzhong LIN Weixing and WEN Jinyu |
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| Affiliation: | State Key Laboratory of Advanced Electromagnetic Engineering and Technology (Huazhong University of Science and Technology), Wuhan 430074, China,State Key Laboratory of Advanced Electromagnetic Engineering and Technology (Huazhong University of Science and Technology), Wuhan 430074, China,State Key Laboratory of Advanced Electromagnetic Engineering and Technology (Huazhong University of Science and Technology), Wuhan 430074, China,National Key Laboratory on Operation and Control of Renewable Energy and Energy Storage (China Electric Power Research Institute), Beijing 100192, China,State Key Laboratory of Advanced Electromagnetic Engineering and Technology (Huazhong University of Science and Technology), Wuhan 430074, China; TBEA Xinjiang Sunoasis Co. Ltd., Urumqi 830011, China and State Key Laboratory of Advanced Electromagnetic Engineering and Technology (Huazhong University of Science and Technology), Wuhan 430074, China |
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| Abstract: | A novel topology of DC/DC converter is proposed, termed as un-interrupted DC Autotransformer(DC AUTO), which has capability to ride through the DC fault on either side of the converter without de-blocking any devices. Firstly, the characteristics of the DC AUTO and its defects are analyzed. Aiming at the problem that current DC AUTO cannot ride through the DC fault, the requirements for the ability of riding through the DC fault are analyzed as well. On the basic of that, combined with the characteristics of the hybrid modular multilevel converter(hybrid-MMC), the hybrid-MMC number of DC AUTO with the ability of riding through the DC fault without de-blocking any devices is designed. Then, an effective control strategy is proposed to enable the converter keeping in the steady operation during both normal and fault conditions. Finally, a test system is built on PSCAD/EMTDC platform to verify the technical feasibility of the proposed converter and the effectiveness of the proposed control strategy. |
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| Keywords: | DC-DC conversion DC autotransformer high voltage direct current transformer DC fault control strategy |
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