考虑元件结构脆弱性与环境温度不确定性的元件热稳定限额计算方法  

Calculating method of the thermal stability control limit considering the structural vulnerability of the component and environmental temperature uncertainty

作　　者：唐陇军 杨秋霖 朱兰 姬星羽 牛培源 TANG Longjun;YANG Qiulin;ZHU Lan;JI Xingyu;NIU Peiyuan(School of Electric Power Engineering,Shanghai University of Electric Power,Shanghai 200090,China;East China Electric Power Control Center,Shanghai 200120,China)

机构地区：[1]上海电力大学电气工程学院,上海200090 [2]国网华东电力调控分中心,上海200120

出　　处：《电力系统保护与控制》2020年第15期1-9,共9页Power System Protection and Control

基　　金：国家自然科学基金青年科学基金项目资助(51807114);上海市科委项目资助(18DZ1203200);上海绿色能源并网工程技术研究中心项目资助(13DZ2251900)。

摘　　要：计及电力系统不同元件运行需要的差异,提出考虑元件结构脆弱性与环境温度不确定性的元件热稳定限额计算方法。综合转移系数复用和转移泰尔熵作为元件权重指标,建立提高脆弱性元件安全裕度的热稳定限额计算模型。并进一步考虑元件环境温度的不确定性,采用导线动态载流能力机会约束替代传统短时过载能力约束,挖掘现有设备输电潜力,降低环境温度超出规程约定值造成的风险。算例分析验证了该方法的有效性。Taking the differences in the operation needs of different components of the power system into account,a method for calculating the thermal stability control limit of components considering the structural vulnerability of the components and the uncertainty of the environmental temperature is proposed.By integrating the transfer coefficient multiplexing index and transferring the Theil entropy index as component weight indicators,a thermal stability limit calculation model that improves the safety margin of vulnerable components is established.Furthermore,the uncertainty of the component’s environmental temperature is considered by using the opportunity constraints of the dynamic current carrying capacity of the wire to replace the traditional short-term overload capacity constraints.The transmission potential of existing equipment is tapped and the risk caused by the environmental temperature exceeding the agreed value of the regulations is reduced.The analysis of a numerical example validates the effectiveness of the proposed method.

关 键 词：热稳定限额 结构脆弱性 转移系数 机会约束规划 导线动态增容 

分 类 号：TM744[电气工程—电力系统及自动化]