利用远程THD测量定位馈线级谐波的起源

K. McBee, Marcelo Simoes
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引用次数: 4

摘要

为了提高电力输送效率,许多公用事业公司安装了电压和VAr优化应用程序,这些应用程序依赖于安装在馈线上的电容器组来调节电压和变电站VAr。由于加热效应,用户注入的谐波电流会抑制此类应用的运行效率。本文描述了一种识别馈线级谐波起源位置的方法,该方法使用从电容器组远程检索的THD测量和单谐波频谱分析。作者利用一个简化的配电系统模型来执行电流注入计算,以匹配从远程监测中识别的馈线电平畸变。频谱分析测量用于确定THD测量的单个谐波,并开发谐波源并联阻抗。该工艺应用于现有的Volt/VAr应用程序,该应用程序经常遇到9%的电压THD。
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Locating the origin of feeder level harmonics utilizing remote THD measurements
The drive for power delivery efficiency has led to many utility companies installing Voltage and VAr Optimization applications, which rely upon capacitor banks installed throughout a feeder to regulate voltage and substation VArs. Due to heating effects, harmonic currents that are injected by customers can inhibit the operational effectiveness of such applications. This paper describes a method for indentifying the originating locations of feeder level harmonics with the use of THD measurements retrieved remotely from capacitor banks and a single harmonic spectrum analysis. The authors utilize a simplified distribution system model to perform current injection calculations to match the measured feeder level distortion that is identified from remote monitoring. The spectrum analysis measurement is utilized to determine the individual harmonics of the THD measurements and to develop harmonic source parallel impedances. The process was applied to an existing Volt/VAr application that was frequently experiencing 9% voltage THD.
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