摘要
伴随着光伏集中式并网的快速发展,大型光伏电站并网对电网影响也成为新的研究热点。高电压远距离外送的大容量并网光伏电站出力波动会造成并网点电压的波动,故障时甚至会造成电压越限,有必要探究大型光伏并网的稳态运行及故障情况下的无功电压协调控制问题,提高电网的电压安全稳定性。针对现阶段国内外新能源并网无功控制的研究进展,阐述并网光伏发电的常用无功电压控制策略。
With the rapid development of grid-connected centralized photovoltaic system, the impact of large-scale grid-connected PV power station on power grid is now a hot topic in the research. Using high-voltage and long-distance transmission, the power fluctuation of large-scale PV power station will cause the voltage fluctuation at point of common cotlpling and even the over-limit when faults occur. Hence, it is necessapy to study the voltage and reactive control （VQC） of large-scale grid-conneeted PV under the condition of steady state and faults respectively to improve the security and stability of power grid voltage. On the basis of latest domestic and foreign research progress of new energy VQC, this paper expounds some common strategy of it.
出处
《陕西电力》
2016年第10期20-26,共7页
Shanxi Electric Power
基金
国家电网公司科技项目资助(522830140003)
关键词
无功电压
集中式
大型光伏
并网
协调控制
reactive voltage
centralization
large-scale PY
grid-connected
coordinated control
