| 基于最大调制比的LCC-MMC混合直流交流侧故障控制策略 |
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| 引用本文： | 刘志超,时伯年,刘斌,熊卿,洪潮.基于最大调制比的LCC-MMC混合直流交流侧故障控制策略[J].电力系统自动化,2017,41(4):125-130. |
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| 作者姓名： | 刘志超 时伯年 刘斌 熊卿 洪潮 |
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| 作者单位： | 北京四方继保自动化股份有限公司, 北京市 100085,北京四方继保自动化股份有限公司, 北京市 100085,北京四方继保自动化股份有限公司, 北京市 100085,南方电网科学研究院有限责任公司, 广东省广州市 510080,南方电网科学研究院有限责任公司, 广东省广州市 510080 |
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| 摘 要： | 对现有常规直流工程进行逆变站柔性化改造,是解决多馈入直流输电系统潜在级联换相失败问题的一个有效方案,改造后的混合直流系统整流站沿用电网换相换流器,逆变站新建模块化多电平换流器。首先对电网换相换流器和模块化多电平换流器(LCC-MMC)混合直流系统的拓扑结构、基本控制方法以及整流站交流侧故障时功率骤降问题进行了阐述。然后,针对上述问题,提出了基于最大调制比的交流侧故障控制策略,在整流站交流侧故障时,该策略能够通过调节逆变站模块化多电平换流器的调制比,维持直流电流的恒定,降低混合直流系统传输有功功率的跌落幅度,从而减小传输功率骤降对逆变站交流系统的冲击。最后,在PSCAD/EMTDC中建立了混合直流输电系统的仿真模型,验证了所提控制策略的有效性。
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| 关 键 词： | 混合高压直流系统 最大调制比 交流侧故障控制策略 电流裕度控制 |
| 收稿时间： | 2016/7/1 0:00:00 |
| 修稿时间： | 2016/12/20 0:00:00 |
Control Strategies of LCC-MMC Hybrid HVDC Transmission Under AC System Fault Based on Maximum Modulation Index |
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| LIU Zhichao,SHI Bonian,LIU Bin,XIONG Qing and HONG Chao.Control Strategies of LCC-MMC Hybrid HVDC Transmission Under AC System Fault Based on Maximum Modulation Index[J].Automation of Electric Power Systems,2017,41(4):125-130. |
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| Authors: | LIU Zhichao SHI Bonian LIU Bin XIONG Qing and HONG Chao |
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| Affiliation: | Beijing Sifang Automation Co. Ltd., Beijing 100085, China,Beijing Sifang Automation Co. Ltd., Beijing 100085, China,Beijing Sifang Automation Co. Ltd., Beijing 100085, China,Electric Power Research Institute of China Southern Power Grid Company Limited, Guangzhou 510080, China and Electric Power Research Institute of China Southern Power Grid Company Limited, Guangzhou 510080, China |
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| Abstract: | Replacing the line commutated converter(LCC)with modular multilevel converter(MMC)at the inverter side is one of the most efficient paths to avoid commutation failure. Firstly, an account is given to the topological structure of LCC-MMC hybrid high voltage direct current(HVDC)system, the basic control scheme, and the power ramp-down problem under AC system fault. Secondly, control strategies of hybrid HVDC transmission system based on maximum modulation index are proposed to maintain direct current under AC system fault by adjusting the modulation index of MMC. Finally, a hybrid HVDC simulation system is built in PSCAD/EMTDC to verify the effectiveness of the proposed control strategies. |
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| Keywords: | hybrid high voltage direct current system maximum modulation index fault control strategies at AC side current margin control |
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