三角洲13.8 kV配电网高阻抗故障评价

Oscar Kim Junior, C. S. S. Salas, M. A. Ravaglio, L. F. Toledo
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引用次数: 0

摘要

对大多数电力公司来说,高阻抗故障的检测是一个挑战。这项工作提出了实验室和现场测试的计算机模拟结果,以验证电流和电压对高阻抗故障的检测和分类的行为。波形数据由ATP(可选瞬态程序)生成,示波器通过实验室和现场测试获得,这些测试与草地、沥青、混凝土和粘土表面上的电缆断裂有关。试验系统由一个变电站与34.5-13.8 kV电力变压器威-地-德尔塔组成。一条13.8千伏的母线和三条农村配电馈线。13.8 kV的三角母线连接到锯齿形接地电抗器。对获得的数据集进行了评估,并创建了用于检测和分类高阻抗故障的规则。剩余电流、剩余电压和比值V2/V1显示了一种特征行为,并允许创建一种高阻抗故障检测和分类方法。该方法性能可靠,真实投料机试验结果正确率高于80%。
本文章由计算机程序翻译,如有差异,请以英文原文为准。
Evaluation of High Impedance Faults in Delta 13.8 kV Distribution Network
The detection of high impedance faults is a challenge for most Power Utilities Companies. This work presents the results of computer simulations of laboratory and field tests to verify the behavior of the currents and voltages to the detection and classification of high impedance faults. Waveform's data were produced by ATP (Alternative Transient Program) and oscillographs were obtained by laboratory and field tests related to broken cable on grass, asphalt, concrete, and clay surfaces. The test system is composed of a substation with 34.5-13.8 kV power transformer Wye-grounded-Delta., a 13.8 kV bus, and three rural distribution feeders. The 13.8 kV delta bus is connected to a Zig-Zag Grounding Reactor. The dataset obtained was evaluated and rules had been created for detecting and classifying high impedance faults. The residual current, residual voltage, and ratio V2/V1 show a characteristic behavior and allow create a method for high impedance fault detection and classification. The method performance was reliable, with true results higher than 80% for real feeder tests.
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