大容量机组一次调频参数对电网频率特性的影响  

Influence on the grid frequency characteristic by the parameters of primary frequency modulation of large capacity generator units

作　　者：金娜[1] 刘文颖[1] 曹银利[2] 行舟[2] 崔岗[2] 

机构地区：[1]华北电力大学电气与电子工程学院,北京102206 [2]甘肃电力调度通信中心,甘肃兰州730050

出　　处：《电力系统保护与控制》2012年第1期91-95,100,共6页Power System Protection and Control

基　　金：甘肃省重点科技项目支持(2006501098)

摘　　要：随着发电机组容量的不断提高,大容量机组一次调频参数成为影响电网频率特性的关键因素。从发电机组一次调频机理出发,建立发电机组并网运行一次调频数学模型,理论分析了调差系数和调速器死区参数设置与电网频率稳定性和调频能力的关联关系。通过对甘肃电网的实例仿真分析,证明大容量机组调差系数和调速器死区设置对电网频率特性的重要影响。给出了甘肃电网的大容量机组在参与一次调频时的最佳调频参数,为大容量机组选择合理的一次调频参数提供参考依据。With the continuous increase of the generating unit capacity, the primary frequency modulation parameters of large capacity generator units become the key factors of influencing the grid frequency characteristics. According to the working principle of the primary frequency, this paper establishes the mathematical model of the primary frequency for generators when interconnected to the power grid, theoretically researches the relation between the setting of the adjustable deviation coefficient and the dead zone of large capacity generator units and the frequency stability and ability of the primary frequency of power grid. Based on the simulation analysis of Gansu power grid, this paper proves that the setting of the adjustable deviation coefficient and dead zone is important for the power system frequency stability. The optimum FM parameters when the large capacity units of Gansu power grid participates in the primary frequency modulation are given, which provides the reference basis for setting the rational modulation parameters of primary frequency of large capacity generator units.

关 键 词：大容量机组 一次调频 死区 调差系数 频率特性 

分 类 号：TM711[电气工程—电力系统及自动化]