计及新能源幅相特性的新型多馈入短路比指标
A New Multi-infeed Short Circuit Ratio Index Taking Into Account the Amplitude and Phase Characteristics of New Energy
黄启元 1曹善康 1吴宇奇 1林湘宁 1魏繁荣 1杨丹 2崔挺2
作者信息
- 1. 强电磁工程与新技术国家重点实验室(华中科技大学),湖北省 武汉市 430074
- 2. 国网湖南省电力有限公司电力科学研究院,湖南省 长沙市 410007
- 折叠
摘要
为了合理评估高比例新能源并网的多馈入高压直流输电(multi-infeed HVDC,MIDC)系统电压支撑能力,该文首先分析 MIDC 系统结构特点,随后基于多馈入短路比(multi-infeed short circuit ratio,MISCR)指标,并结合新能源短路电流幅值和相位随机端电压变化的特性(以下简称"幅相特性"),提出多馈入暂态短路比(multi-infeed transient short circuit ratio,MITSCR)指标;其次,根据国家标准的要求分析以双馈风机(doubly-fed induction generator,DFIG)为代表的新能源在不同控制模式下的幅相特性,并通过MITSCR指标分析DFIG接入对MIDC系统节点电压支撑能力影响;最后,利用PSACD/EMTDC软件进行时域仿真分析,结果表明,MITSCR指标能有效表征节点的电压支撑能力,验证了该指标的有效性与优越性.
Abstract
In order to properly evaluate the voltage support capability of the multi-infeed HVDC(MIDC)system with high proportion of new energy access,this paper first analyzes the structural characteristics of the MIDC system,and based on the multi-infeed short circuit ratio(MISCR)index and the characteristics of the amplitude and phase variation of the short-circuit current(hereinafter referred to as"amplitude and phase characteristics")caused by new energy,a new index called multi-infeed transient short circuit ratio(MITSCR)is proposed.Then,adhering to the requirements stipulated in the National Standard of the People's Republic of China,the amplitude and phase characteristics of new energy represented by doubly-fed induction generators(DFIG)under different control modes are analyzed,and the impact of DFIG access on the node's voltage support capability of the MIDC system is also analyzed through the MITSCR index.Finally,time-domain simulation analysis is carried out using the PSACD/EMTDC software,and the results show that the MITSCR index can effectively characterize the node's voltage support capability,verifying the effectiveness and superiority of the index.
关键词
多馈入直流输电/新能源/幅相特性/电压支撑能力/多馈入暂态短路比Key words
multi-infeed high voltage direct current/new energy/amplitude and phase characteristics/voltage support ability/multi-infeed transient short circuit ratio(MITSCR)引用本文复制引用
基金项目
国家自然科学基金企业创新发展联合基金项目(U22B20106)
国网湖南省电力有限公司科技项目(5216A021002U)
出版年
2024
国家科技期刊平台
NSTL
万方数据