摘要
气体绝缘开关设备是电力系统中的重要设备,其稳定性一直备受关注。在正常气象环境下,评估GIS隔离开关热点温度达到最大温度限值所需的载流量,可以确定设备本身的载流量裕度,为电力系统中的电力调度提供参考。本文主要以GIS(Gas Insulated Switchgear)隔离开关为研究对象,首先从GIS隔离开关模型开始通过将热量的传递类比为电路来建立对应一阶热路模型,在此基础上进一步将热路模型等效为负荷致热的一阶热路模型和环境致热的一阶热路模型,利用建立的GIS隔离开关多物理场仿真模型开展暂态场仿真,得到了负荷致热等效热路模型的阻容参数,并基于时间序列分析法与ARIMA模型建立了具有较高精度的环境致热温度预测模型。随后利用预测的环境致热温度,以105℃为最大温度限值,预测得到了GIS隔离开关的动态载流量曲线,建立了动态载流量评估方法,为GIS隔离开关动态载流量的评估提供参考。
Gas insulation switch is an important equipment in power system and its stability has always attracted much attention.Under normal meteorological conditions,evaluating the current carrying capacity required for the GIS isolation switch hotspot temperature to reach the maximum temperature limit can determine the current carrying capacity margin of the equipment itself,which can provide reference for power dispatching in power system.The GIS disconnection switch is taken as the research object in this paper.Firstly,a first-order thermal circuit model indeced is established by analogizing the heat transfer to an electric circuit.The thermal circuit model can be further equivalent to a load induce heating first-order thermal circuit model and an environmental induced heating first-order thermal circuit model.The established GIS disconnect switch multi physics field simulation model is used to carry out transient field simulation,and the resistance capacitance parameters of the load induced heating equivalent thermal circuit model are obtained.Based on time series analysis and ARIMA model,a high-precision environmental induced heating temperature prediction model is established.Subsequently,using the predicted environment induced heating temperature with a maximum temperature limit of 105℃,the dynamic current carrying capacity curve of the GIS disconnect switch is predicted,The established dynamic current carrying capacity evaluation method can provide reference for the evaluation of the dynamic current carrying capacity of GIS disconnect switch.
作者
曾嘉
李锐
ZENG Jia;LI Rui(Guangxi Power Grid Co.,Ltd.,Guangxi Nanning 530023,China;Guangxi Key Laboratory of Intelligent Control and Operation and Maintenance of Power Equipment,Electric Power Research Institute of Guangxi Power Grid Co.,Ltd.,Guangxi Nanning 530023,China;Guangxi Power Grid Equipment Monitoring and Diagnosis Technology Innovation Center,Electric Power Research Institute of Guangxi Power Grid Co.,Ltd.,Guangxi Nanning 530023,China)
出处
《广西电力》
2024年第1期1-7,共7页
Guangxi Electric Power
关键词
GIS隔离开关
热路模型
动态载流量
评估方法
GIS disconnect switch
thermal circuit model
dynamic carrying capacity
assessment methodology switch
