Improving the Accuracy of Impedance Calculation for Distribution Power System

被引：18

作者：

Keshtkar, Hessam ^{[1
]}

Solanki, Sarika Khushalani ^{[1
]}

Solanki, Jignesh M. ^{[1
]}

机构：

[1] W Virginia Univ, Morgantown, WV 26505 USA

来源：

IEEE TRANSACTIONS ON POWER DELIVERY | 2014年 / 29卷 / 02期

基金：

美国国家科学基金会;

关键词：

Carson equation; distribution system modeling and analysis; impedance calculation; numerical integration method; power distribution lines; GROUND-RETURN IMPEDANCE; CLOSED-FORM APPROXIMATION; WAVE-PROPAGATION; LINES; MODEL;

D O I：

10.1109/TPWRD.2013.2276061

中图分类号：

TM [电工技术]; TN [电子技术、通信技术];

学科分类号：

0808 ; 0809 ;

摘要：

This paper compares different approximation methods and develops a new method for simplification of Carson's equations to model distribution lines for unbalanced power flow and short-circuit analysis. The comparisons are made for real and imaginary parts of self and mutual impedances. The impedances obtained by application of different approximation methods are utilized for lines and cables of a long feeder with a load and the IEEE 123-node system. The effect of varying ground resistivity and frequency on impedances is observed. The unbalanced power-flow results of both systems are compared for voltage, current, active, and reactive power flow. It is observed that different approximation methods for impedance calculation have considerable effects on the results of power flow, especially on node voltages which are critical for power quality and steady-state analysis of distribution systems.

引用

页码：570 / 579

页数：10

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