摘要
随着新能源的不断发展,大规模双馈风电机组接入电力系统对电网的暂态稳定性带来了较大影响。为此,提出了一种基于故障信息的风机并网系统暂态稳定分析方法,将继电保护装置提供的故障信息融合到暂态稳定判断中。首先,分析故障后双馈风电场的对外特性以及负序、零序阻抗模型;然后,推导包含故障信息的系统导纳收缩矩阵;在此基础上,利用扩展等面积定则提出一种暂态稳定裕度指标,作为系统是否发生暂态失稳的判断依据。最后,通过对含双馈风电场的3机9节点系统进行仿真,验证了所提方法的正确性和有效性。
With the development of new energy,the integration of large-scale doubly-fed wind turbin units into the power systems have a great impact on the transient stability of the power grid.Therefore,a transient stability analy⁃sis method for power systems with wind turbines integrated based on fault information is proposed.This method in⁃corporates fault information provided by protective relays into the transient stability judgment.Firstly,the external characteristics of the doubly-fed wind farm after faults and the negative-sequence and zero-sequence impedance models are analyzed.Subsequently,a system admittance matrix containing fault information is derived.Moreover,the EEAC(extended equal area criterion)is utilized to introduce a transient stability margin index,which serves as the basis for determining whether the system undergoes transient instability.Finally,the correctness and effective⁃ness of the proposed method are verified through simulation on a 3-machine 9-bus system containing doubly-fed wind farms.
作者
陈水耀
胡晨
马伟
王源涛
王嘉琦
CHEN Shuiyao;HU Chen;MA Wei;WANG Yuantao;WANG Jiaqi(State Grid Zhejiang Electric Power Co.,Ltd.,Hangzhou 310007,China;State Grid Hangzhou Power Supply Company,Hangzhou 310009,China)
出处
《浙江电力》
2023年第9期89-98,共10页
Zhejiang Electric Power
基金
国网浙江省电力有限公司科技项目(5211HZ21N00B)。
关键词
暂态稳定
不对称故障
双馈风电场
扩展等面积定则
transient stability
asymmetric fault
doubly-fed wind farm
fault information
EEAC
