摘要
随着电能需求日渐增长,通过动态增容技术评估架空线路潜在输电能力成为迫切需求。传统动态增容模型由于风速测量精度及设备安装维护等问题难以推广实施。基于非接触式等效测量原理,提出一种架空线路动态增容等效散热暂态测量模型,该模型既可快速准确评估导线载流量,测量设备又独立于导线便于安装维护。在模型建立过程,分别提出数值差商求导法和解析求导法2种数据处理方法对模型微分方程进行求解。基于铝球的有限元仿真,分析不同数据处理方法对等效测量模型计算结果的影响。最后通过搭建微风风洞实验平台模拟铝球装置的运行,利用实验数据对模型进行求解,确定模型计算所需的暂态数据量,并将模型计算结果与IEEE Std 738^(TM)-2012标准结果对比,以验证模型的准确性。研究表明,采用解析求导法,在保证实时性前提下,模型误差≤6%,满足工程应用要求,所提出的等效散热暂态测量模型可实时动态准确地评估架空导线载流量。
With the increasing demand for electric energy,it has become an urgent problem to evaluate the potential transmission capacity of overhead conductors by dynamic thermal rating technology.The traditional dynamic thermal rating model is difficult to promote and implement due to difficulties in the accuracy of wind speed measurement and equipment installation and maintenance.Therefore,based on the principle of non-contact equivalent measurement,an equivalent hear transfer transient measurement model for dynamic thermal rating of overhead conductors is proposed,which can both fastly and accurately calculate the ampacity of overhead conductors and is easy to install and maintain for equipment,because it is independent of the conductor.Two data processing methods,numerical difference quotient derivation method and analytical derivation method,are proposed to solve the differential equations in the process of model establishment.Based on the finite element simulation of aluminum ball,the influences of different data processing methods on the calculation results of the equivalent heat transfer transient measurement model are analyzed.Finally,a breeze wind tunnel experiment platform is built to simulate the operation of the aluminum ball device,the experimental data are used to solve the model to determine the amount of transient data needed for model calculation,and the model calculation results are compared with IEEE Std 738^(TM)-2012 standard results to verify the accuracy of the model.The results show that when the equivalent heat dissipation transient measurement model is calculated by the analytical derivation method,the error of the model is less than 6%under the premise of ensuring the real-time performance,which meets the requirements of engineering applications,therefore,the transient measurement model of equivalent heat dissipation proposed in this paper can dynamically and accurately evaluate the current carrying capacity of overhead conductors in real time.
作者
彭向阳
彭瑞东
王锐
郭德明
范亚洲
刘刚
PENG Xiangyang;PENG Ruidong;WANG Rui;GUO Deming;FAN Yazhou;LIU Gang(Guangdong Key Laboratory of Electric Power Equipment Reliability,Electric Power Research Institute of Guangdong Power Grid Co.,Ltd.,Guangzhou 510080,China;School of Electric Power Engineering,South China University of Technology,Guangzhou 510640,China;Guangdong Power Grid Co.,Ltd.,Guangzhou 510060,China)
出处
《高电压技术》
EI
CAS
CSCD
北大核心
2022年第10期3975-3986,共12页
High Voltage Engineering
基金
中国南方电网科技项目(GDKJXM20185588)。
关键词
架空导线
动态增容
等效散热暂态测量模型
载流量计算
暂态热特性
解析求导法
overhead conductor
dynamic capacity increase
equivalent heat transfer transient measurement model
ampacity calculation
transient thermal characteristics
analytical derivation method
