南方电网技术2024，Vol.18Issue(3)：3-13,11.DOI:10.13648/j.cnki.issn1674-0629.2024.03.001
大规模光伏电站孤岛经柔性直流送出的电压特性
Voltage Characteristics of Large-Scale Islanded PV Station Transmission via VSC-HVDC
摘要
Abstract
For the power transmission of photovoltaic base of the desert and gobi area,it is an important technical solution that the islanded PV station is transmitted via voltage source convert based high voltage direct current(VSC-HVDC).However,VSC-HVDC device is the only steady-state AC voltage source instead of the traditional rotational equipment,which will result in the system volt-age characteristics being different from that of the traditional power grid.Therefore,the researches on the steady-state and transient voltage characteristics of the large-scale islanded PV station transmitted via VSC-HVDC are conducted.Firstly,the system of the large-scale PV station transmitted via VSC-HVDC is introduced in detail.Secondly,the analysis model of steady-state voltage of the islanded transmission system is built,and a steady-state voltage characteristic and power limit analysis method using power circle as a representation and VSC-HVDC transient and steady-state reactive power capacity is proposed,and the steady-state voltage characteristic analysis is carried out through a numerical example system.After that,the transient voltage characteristics of large-scale islanded photovoltaic power plants under severe AC faults in the VSC-HVDC island transmission system are studied,and a new energy and VSC-HVDC transient coordinated control strategy is proposeded.Finally,measures are proposed to improve voltage stability and transient characteristics,which can provide reference for the actual operation design of photovoltaic power plant island VSC-HVDC transmission systems.关键词
孤岛外送/柔性直流/光伏电站/电压特性/暂态过电压Key words
islanded transmission/VSC-HVDC/PV station/voltage characteristics/transient overvoltage分类
动力与电气工程引用本文复制引用
黄碧月,辛清明,赵晓斌,袁智勇,冯俊杰..大规模光伏电站孤岛经柔性直流送出的电压特性[J].南方电网技术,2024,18(3):3-13,11.基金项目
国家重点研发计划资助项目"大规模可再生能源基地特高压多端直流输电外送关键技术"(2023YFB2405900) （2023YFB2405900）
中国南方电网有限责任公司科技项目"超远距离大规模新能源送出特高压柔性直流输电送出关键技术研究(重大专项)"(KYKJXM20210207). Supported by the National Key Research and Development Program of China(2023YFB2405900) （重大专项）
the Science and Technology Project of China Southern Power Grid Co.,Ltd.(KYKJXM20210207). （KYKJXM20210207）
