电力系统自动化2025，Vol.49Issue(8)：40-53,14.DOI:10.7500/AEPS20231113004
用于大规模新能源架空线路送出的储能型柔性直流输电系统
Flexible DC Transmission System with Energy Storage System for Large-scale Renewable Energy Delivery Through Overhead Line
摘要
Abstract
For the scenario of large-scale renewable energy delivery through long-distance overhead lines,a flexible DC transmission system with energy storage system is proposed,which achieves functions such as suppressing power fluctuation of renewable energy,blocking DC fault,and actively supporting the power grid.The system is a hybrid DC transmission system with two terminals.The sending-end converter station adopts the MMC with energy storage system with the capability of blocking DC fault.The receiving-end converter station is an MMC with half-bridge submodules.For blocking the DC fault current of the MMC at the receiving end,a diode valve is installed on the grounding electrode line.In this paper,the operation principle of the flexible DC transmission system with energy storage system is analyzed.The development mechanism of bipolar short-circuit fault current of the MMC with energy storage system with the capability of blocking DC fault is studied.The corresponding control strategies for the active power support and the DC fault ride-through are provided.Finally,a corresponding simulation model is built,which verifies the feasibility of the proposed flexible DC transmission system with energy storage system and the effectiveness of the proposed control strategies.The simulation results show that,by using the proposed topology and control strategies,the flexible DC transmission system with energy storage system can achieve stable delivery of large-scale fluctuating electric energy,while providing effective active power support and realizing autonomous clearing of DC short-circuit fault during the power transmission process.关键词
新能源/柔性直流输电系统/模块化多电平换流器/储能系统/故障穿越/故障电流Key words
renewable energy/flexible DC transmission system/modular multilevel converter(MMC)/energy storage system/fault ride-through/fault current引用本文复制引用
肖晃庆,朱琼海,黄莹,张利东,周保荣,李岩..用于大规模新能源架空线路送出的储能型柔性直流输电系统[J].电力系统自动化,2025,49(8):40-53,14.基金项目
中国南方电网有限责任公司创新项目(ZBKJXM20232278) （ZBKJXM20232278）
广东省基础与应用基础研究基金资助项目(2023A1515111125). This work is supported by Innovation Project of China Southern Power Grid Company Limited(No.ZBKJXM20232278)and Guangdong Provincial Basic and Applied Basic Research Fund(No.2023A1515111125). （2023A1515111125）
