分址建设直流输电系统拓扑方案与运行特性研究

doi:10.19595/j.cnki.1000-6753.tces.221374

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摘要

针对我国西部地区大规模可再生能源跨区输送场景,提出一种适用于不同地理位置新能源基地接入的分址建设特高压直流输电系统。首先,介绍该系统在常规直流与柔性直流换流器两种可行方案下的拓扑结构与控制方式。考虑分址建设场景下电网强度和地理距离对系统的影响,研究系统在交直流故障下的暂态响应与故障穿越方案。然后,根据两种方案的暂稳态运行特性,从经济性、技术性的角度对方案进行对比,并给出改进措施与推荐方案。最后,在PSCAD/EMTDC中搭建分址建设特高压直流输电系统模型,仿真验证系统暂稳态下的运行特性。

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	孟沛彧
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	文劲宇

关键词 ：可再生能源, 分址建设, 高压直流输电, 交直流故障穿越

Abstract：

Aiming at the large-scale cross-regional transmission of renewable energy in the western region of China, a site-division construction of the UHVDC transmission system suitable for the integration of renewable energy bases in different locations was proposed. Firstly, the topology and control methods of the system under two feasible schemes of LCC-HVDC and MMC-HVDC were introduced. Considering the influence of grid’s strength and geographic distance on the system in the site-division construction scenario, the transient response and fault ride-through scheme of the system under AC and DC faults were researched. Then, according to the transient and steady-state operation characteristics of the two schemes, the schemes were compared from the economic and technical aspects. The improvement measures and recommended schemes were given. Finally, the site-division construction HVDC system was built in PSCAD/EMTDC, and the operation characteristics of the system under the transient and steady state were verified.

Key words： Renewable energy site-division construction HVDC transmission AC and DC fault ride-through

收稿日期: 2022-07-16

PACS:

TM721

基金资助:

国家电网有限公司总部管理科技项目“4000米高海拔下接入弱交流系统的分址建设特高压直流设计关键技术研究”（5200-202256077A-1-1-ZN）资助

通讯作者: 向往男,1990年生,教授,博士生导师,研究方向为柔性直流输电技术、直流电网、交直流电网运行与控制等。E-mail：xiangwang1003@hust.edu.cn

作者简介: 孟沛彧男,1997年生,博士研究生,研究方向为直流输电系统建模与控制。E-mail：pennymeng1@foxmail.com

引用本文:

孟沛彧, 向往, 潘尔生, 赵峥, 李探, 文劲宇. 分址建设直流输电系统拓扑方案与运行特性研究[J]. 电工技术学报, 2022, 37(19): 4808-4822. Meng Peiyu, Xiang Wang, Pan Ersheng, Zhao Zheng, Li Tan, Wen Jinyu. Research on Topology and Operation Characteristics of HVDC Transmission System Based on Site-Division Construction. Transactions of China Electrotechnical Society, 2022, 37(19): 4808-4822.

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