在存在谐波的情况下计算线路和中性导体的电容和尺寸

Proceedings of 1995 Industrial and Commercial Power Systems Conference Pub Date : 1995-05-07 DOI:10.1109/ICPS.1995.526989

A. Hiranandani

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引用次数: 6

摘要

目前，非线性负荷在工业和商业电力系统中所占的比重越来越大。非线性负载在线路电流中产生谐波，导致额外的导体加热。这种加热导致电缆的较高温升，如果电缆的尺寸不能承载谐波电流，则可能超过电缆的额定温度。NEC或ieee现有的容量表是基于正弦电流产生的热量。电缆中存在非正弦谐波电流需要对电缆进行降额处理。本文提出了一个计算有谐波存在的线导体和中性导体的电流的公式

本文章由计算机程序翻译，如有差异，请以英文原文为准。

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Calculation of ampacities and sizing of line and neutral conductors in the presence of harmonics

Today nonlinear loads are becoming a bigger part of the electrical load in industrial and commercial power systems. Nonlinear loads generate harmonics in line currents resulting in additional conductor heating. This heating results in a higher temperature rise of the cable which can exceed the rated temperature of the cable if it is not sized to carry harmonic currents. Existing ampacity tables by the NEC or IEEE are based on heating generated by sinusoidal currents. The presence of nonsinusoidal harmonic currents in the cable requires derating of the cable. This paper has developed an equation for calculating the ampacity for line and neutral conductors in the presence of harmonics

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Proceedings of 1995 Industrial and Commercial Power Systems Conference

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