摘要
近年来,我国新能源持续快速增长,在电网中占比日益提高,逐步进入大规模发展阶段。该文结合电网生产运行实际情况,对风电、光伏等新能源大规模发展及电网承载能力问题开展研究。首先,研究了风电、光伏等新能源发展形势。其次,分析了风电、光伏的系统结构及运行特性,着重研究了其与常规机组对系统安全稳定运行的不同影响。再次,从系统转动惯量替代的角度,研究了新能源高占比导致电网抗扰动能力下降问题;从新能源耐频、耐压能力不足角度,研究了新能源大规模脱网易造成连锁故障风险增加问题;研究了新能源机组产生的次同步谐波易引发次同步振荡问题;然后,研究了新能源消纳问题。最后,提出了新能源与电网协调发展的相关建议。
As new energy grows rapidly in China, its ratio increases year by year. Problems about large-scale development of wind and solar power, together with supporting capacity of power grids, Were studied in this paper. Firstly, development trends of wind and solar power were analyzed. Secondly, system architecture and operation characteristics of wind and solar power were studied, mainly focusing on the difference to conventional power. Thirdly, the decrease of disturbance resistance capability due to new energy, together with the increase of cascading failure risk, was explored. Subsynchronous oscillation associated with new energy was investigated. Problems and influence factors of new energy accommodation were studied. Finally, some suggestions to ensure coordinated development of new energy and power grid were proposed.
出处
《中国电机工程学报》
EI
CSCD
北大核心
2017年第1期20-26,共7页
Proceedings of the CSEE
关键词
新能源
技术瓶颈
转动惯量
承载能力
次同步振荡
new energy
technical bottleneck
moment of inertia
supporting capacity
subsynchronous oscillation
