通过混合直流输电实现大规模可再生能源发电的配置和暂态稳定性回顾

Xinshou Tian;Yongning Chi;Longxue Li;Hongzhi Liu
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引用次数: 0

摘要

基于线路换流器(LCC)和模块化多电平换流器(MMC)在电网应用中的优势互补,混合直流系统拓扑结构有两种:一种是 LCC 换流站和 MMC 换流站并联,另一种是 LCC 换流站和 MMC 换流站在单站内串联。混合直流输电系统在我国大规模清洁能源跨区整合和以新能源为主导的新型电力系统建设中具有广阔的应用前景和发展潜力。本文首先分析了混合直流输电的系统形式和拓扑特征,介绍了换流器级混合直流输电系统和系统级混合直流输电系统的形式和拓扑特征。其次,分析了 LCC 和 MMC 逆变器级混合直流输电系统的运行特性,深入探讨了混合直流输电系统的暂态稳定性以及典型的故障穿越控制策略。最后,总结了换流站混合直流输电系统中 LCC-MMC 系列的联网特性,研究了接收端换流站中 LCC-MMC 系列在不同故障类型下的暂态特性和故障穿越控制策略,并探讨了发送端换流站中 LCC-MMC 系列在不同故障类型下的暂态特性和故障穿越控制策略。
本文章由计算机程序翻译,如有差异,请以英文原文为准。
Review of the Configuration and Transient Stability of Large-Scale Renewable Energy Generation Through Hybrid DC Transmission
Based on the complementary advantages of Line Commutated Converter (LCC) and Modular Multilevel Converter (MMC) in power grid applications, there are two types of hybrid DC system topologies: one is the parallel connection of LCC converter stations and MMC converter stations, and the other is the series connection of LCC and MMC converter stations within a single station. The hybrid DC transmission system faces broad application prospects and development potential in large-scale clean energy integration across regions and the construction of a new power system dominated by new energy sources in China. This paper first analyzes the system forms and topological characteristics of hybrid DC transmission, introducing the forms and topological characteristics of converter-level hybrid DC transmission systems and system-level hybrid DC transmission systems. Next, it analyzes the operating characteristics of LCC and MMC inverter-level hybrid DC transmission systems, provides insights into the transient stability of hybrid DC transmission systems, and typical fault ride-through control strategies. Finally, it summarizes the networking characteristics of the LCC-MMC series within the converter station hybrid DC transmission system, studies the transient characteristics and fault ride-through control strategies under different fault types for the LCC-MMC series in the receiving-end converter station, and investigates the transient characteristics and fault ride-through control strategies under different fault types for the LCC-MMC series in the sending-end converter station.
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