子模块混合型LCC-MMC混合直流输电系统的启动控制策略

杨洋; 王瑶; 李浩涛; 罗恩博; 贾轩涛; 郝俊芳; 严兵; 孔令凯; 张群

引用本文:	杨洋,王瑶,李浩涛,等.子模块混合型LCC-MMC混合直流输电系统的启动控制策略[J].电力系统保护与控制,2018,46(8):58-64.
	YANG Yang,WANG Yao,LI Haotao,et al.Start-up control strategies for the cell-hybrid LCC-MMC hybrid HVDC system[J].Power System Protection and Control,2018,46(8):58-64

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子模块混合型LCC-MMC混合直流输电系统的启动控制策略
杨洋¹,王瑶²,李浩涛¹,罗恩博¹,贾轩涛³,郝俊芳²,严兵²,孔令凯²,张群²
(1.云南电网有限责任公司电力科学研究院，云南昆明 650011;2.许继电气股份有限公司，河南许昌 461000; 3.国网浙江省电力公司检修分公司，浙江杭州 310018)

摘要:

为了充分发挥电网换相换流器(LCC)和模块化多电平换流器(MMC)各自的优势，并使MMC具有直流故障穿越能力，研究了一种新型LCC-MMC混合直流输电系统。该系统主要特点是整流侧采用传统LCC，逆变侧采用由半桥子模块、全桥子模块和箝位双子模块构成的混合型MMC，具有可过调制运行和直流故障穿越的功能。重点分析了此种混合直流输电系统的启动过程，并给出了LCC和MMC的启动控制策略。最后，在物理动模混合直流输电试验系统上进行了验证，结果表明了该启动策略的可行性和有效性。

关键词: 混合直流输电混合子模块子模块充电启动控制动模系统

DOI：10.7667/PSPC170479

分类号:

基金项目:国家重点基础研究发展计划“高压大容量柔性直流输电系统关键技术与工程示范”

Start-up control strategies for the cell-hybrid LCC-MMC hybrid HVDC system

YANG Yang¹,WANG Yao²,LI Haotao¹,LUO Enbo¹,JIA Xuantao³,HAO Junfang²,YAN Bing²,KONG Lingkai²,ZHANG Qun²

(1. Electric Power Research Institute of Yunnan Power Grid Co., Ltd., Kunming 650011, China;2. XJ Electric Co., Ltd., Xuchang 461000, China;3. Maintenance Branch of State Grid Zhejiang Electric Power Company, Hangzhou 310018, China)

Abstract:

In order to fully exert the advantages of LCC and MMC and enable the MMC to have DC fault ride through capability, this paper researches a new LCC-MMC hybrid HVDC system. The system uses traditional LCC in the rectifier side and cell-hybrid MMC in the inverter side. The MMC consists of half-bridge sub-module, full-bridge sub-module and clamp-double sub-module, and has the function of over modulation working and DC fault pass through. It emphatically analyzes the start-up process of the hybrid HVDC system, and then offers the start-up control strategies of the LCC and VSC. Finally, the experimental verification on the built 24 kW hybrid HVDC system indicates that this start-up strategies is feasible and available. This work is supported by National key Research and Development Program of China “key technology research and demonstration of high-voltage large-copality flexiblex DC grid”.

Key words: hybrid HVDC cell-hybrid sub-module charging start-up control dynamic simulation system

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