| 单向LC型直流—直流变换器的设计与控制 |
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| 引用本文： | 李梦柏,林卫星,文劲宇.单向LC型直流—直流变换器的设计与控制[J].电力系统自动化,2016,40(21):112-116. |
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| 作者姓名： | 李梦柏 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 |
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| 基金项目： | 中国博士后科学基金资助项目(2016T90690) |
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| 摘 要： | 提出一种单向LC型直流—直流变换器,可用于互联两个电压等级不同的直流系统、单向地传输直流功率。该单向LC型直流—直流变换器由电压源型换流器、不控整流器,以及连接它们的LC电路构成。研究了单向LC型直流—直流变换器的拓扑设计,推导了其电感、电容设计步骤,设计了单向LC型变换器的功率控制方法,理论分析了直流故障时,故障电流幅值的大小。然后,在PSCAD/EMTDC上搭建了30 MW±10kV/±100kV仿真算例,验证了所提控制方法的正确性以及拓扑本身所具有的故障穿越能力。相较于其他直流—直流变换器,单向LC型直流—直流变换器具有直流升压比高、功率可控性好、制造成本低、具备直流故障穿越能力等优点。
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| 关 键 词： | 直流电网 直流—直流变换器 高压直流输电 拓扑设计 |
| 收稿时间： | 2016/4/25 0:00:00 |
| 修稿时间： | 2016/10/1 0:00:00 |
Design and Control of Unidirectional LC-type DC-DC Converter |
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| LI Mengbo,LIN Weixing and WEN Jinyu.Design and Control of Unidirectional LC-type DC-DC Converter[J].Automation of Electric Power Systems,2016,40(21):112-116. |
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| Authors: | LI Mengbo 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 and State Key Laboratory of Advanced Electromagnetic Engineering and Technology(Huazhong University of Science and Technology), Wuhan 430074, China |
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| Abstract: | This paper is concerned with a type of unidirectional LC DC-DC converter for interconnecting two DC grids with different voltage levels. This unidirectional LC-type DC-DC converter is composed of voltage source converter, uncontrolled rectifiers and LC circuit which is in series connection with them. The topology design of the converter is studied, and the design procedures are presented. A control strategy for the unidirectional LC-type DC-DC converter is also proposed. The designed converter has the ability to retain the fault current near or within the rated values. A 30 MW ±10 kV/±100 kV model is developed on the PSCAD platform to verify the effectiveness of the control strategy during step power orders and favorable DC fault responses. Compared with other DC-DC converters, the unidirectional LC-type DC-DC converter has high stepping ratios, good controllability, low cost and the ability to ride through DC faults. This work is supported by Post-doctoral Science Foundation of China(No. 2016T90690). |
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| Keywords: | DC grid DC-DC converter high voltage direct current(HVDC)transmission topology design |
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