多路供电系统高压输电线下工频电场的广义数学模型  

Generalized mathematical model of power frequency electric field under high voltage transmission lines of multiple-way feed system

作　　者：宗伟[1] 孙才华[1] 隋吉生[2] 谢瑞宽[2] 

机构地区：[1]华北电力大学电气工程学院,北京102206 [2]吉林供电公司通讯调度所,吉林132001

出　　处：《中国电力》2005年第10期52-55,共4页Electric Power

摘　　要：在电磁环境保护和ADSS光缆悬挂设计时,都需要计算出空间任意点的最大场强值。由于输电线的交流电压随时间而变化,所以空间点的场强也随时间而变化,但在各线布局和电压等级一定的情况下,各点的最大场强值是固定的。为了准确计算多路供电系统高压输电线下空间点的最大场强值,采用等效电荷法,分别基于频域和时域建立了其广义数学模型,并推导出了最大场强计算公式。通过比较发现时域方法占用内存较少且延拓性较强,建议采用时域方法。通过编程对一条同杆塔双回输电线路进行了计算,其结果和理论分析结果一致。The maximal electric field of each point should be calculated in electromagnetic environment protection and setting ADSS. The electric field around the transmission lines is time varying because of the voltage＇s variety, but the maximal electric field of each point is a fixed value when the transmission lines configuration and the voltage grade are ascertained. In order to calculate the maximal electric field under high voltage transmission lines of multiple-way feed system, the generalized mathematical models were established based on frequency-domain and time-domain with charge equivalent method, and the formulas of the maximal electric field were deduced. Time-domain method was suggested because of which less computer memory used and biggish expansibility. Finally, a double-circuit transmission lines on the same tower is calculated with own procedures, which results are accordant with theory analyses.

关 键 词：等效电荷法 多路供电系统 数学模型 ADSS光缆 

分 类 号：TM743[电气工程—电力系统及自动化]