电网技术2024，Vol.48Issue(7)：3043-3052,中插104-中插113,20.DOI:10.13335/j.1000-3673.pst.2023.1066
光伏接入直流受端电网下直流换相失败影响机理初探
A Preliminary Study on the Influence Mechanism of DC Commutation Failure Considering Photovoltaic Access in Terminal Power Grid
摘要
Abstract
With the promotion of the"carbon peaking and carbon neutrality"goals,many renewable energy power generation systems will be connected to the receiving grid of the high voltage direct current(HVDC)transmission system.However,few studies have covered this research scenario,and whether renewable energy will adversely affect DC operations is doubtful.For this reason,this paper analyzes the output characteristics and interactive influence rules of photovoltaic and HVDC under AC power grid faults.It is found that positive and negative sequence current components of 50,100,and 150Hz will be transmitted to the photovoltaic system after HVDC commutation failure,resulting in fluctuations of photovoltaic output power and voltage of connecting points.The feedback transmission of the receiving grid leads to the fluctuation of the HVDC current and the advance trigger angle order of the HVDC system,thus bringing the risk of HVDC subsequent commutation failure.Finally,combined with the PSCAD/EMTDC simulation software,the high-voltage DC transmission system model of the receiving grid with photovoltaic access is built,and the rationality and validity of the above conclusions are verified by simulation.关键词
高压直流输电系统/换相失败/新能源/电压波动/正负序分离Key words
HVDC/commutation failure/renewable energy/voltage fluctuation/positive and negative sequence separation分类
信息技术与安全科学引用本文复制引用
钟文梁,刘健,林圣,赵静波..光伏接入直流受端电网下直流换相失败影响机理初探[J].电网技术,2024,48(7):3043-3052,中插104-中插113,20.基金项目
国家自然科学基金项目(51977183) （51977183）
江苏省自然科学基金项目(BK20221197).Project Supported by National Natural Science Foundation of China(NSFC,51977183) （BK20221197）
Natural Science Foundation of Jiangsu Province(BK20221197). （BK20221197）
