摘要
保障风电汇集系统(WPCS)的暂态电压安全对于风能资源的大规模集群式有效开发利用具有重要意义。首先,以"三北"地区某实际风电场群为研究对象,通过分析暂态故障运行状态下风电机组和无功补偿设备的动态响应特性,详细探讨了风电汇集系统暂态电压安全事故的主要成因和发展过程;在此基础上,提出了一种风电汇集系统暂态电压安全控制策略。仿真结果表明:通过协调双馈风电机组和静止无功补偿设备在暂态过程中的控制配合,能够减缓系统遭受大扰动后的电压波动,从而抑制由于无功过剩所引发的风电机组连锁脱网事故。通过采取文中所提的电压安全控制策略,可以有效提高大规模风电并网系统的安全稳定运行能力。
It is of significance to research the voltage security of the wind power centralized system （WPCS） for developing the large scale clustering wind energy resources effectively. Firstly, an actual WPCS in the ＂Three-North＂ region of China was used to analyze the voltage security quantitatively. By analyzing the reactive power response features of the wind turbines and the reactive power sources, the time domain simulation method was utilized to discuss the main causes and the development process of the WPCS dynamic voltage security accident. Thereby, a dynamic voltage security control strategy was proposed. The simulation results show that the voltage fluctuations caused by the large disturbance can be smoothed by utilizing the coordinated reactive power control between the doubly-fed induction generator wind turbines and the static var compensation devices. The occurrence of the wind turbines＇ cascading trip-off which is caused by the excessive reactive power can be suppressed as well. Therefore, the proposed voltage control strategy can effectively enhance the security and stability of the WPCS.
出处
《高电压技术》
EI
CAS
CSCD
北大核心
2017年第6期2080-2087,共8页
High Voltage Engineering
基金
国家科技支撑计划(2015BAA01B01)
国家电网公司科技项目(NY71-16-017)~~
关键词
风电汇集系统
暂态电压安全
风电机组
无功补偿
无功过剩
电压控制
wind power centralized system
dynamic voltage security
wind turbines
reactive power compensation
excessive reactive power
voltage control
