The influence of power system dynamic regimes on high voltage distribution networks

11th International Conference on Electrical Power Quality and Utilisation Pub Date : 2011-10-01 DOI:10.1109/EPQU.2011.6128936

A. Lipsky, N. Miteva

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引用次数: 1

Abstract

This article presents an approach for estimating the permissible ratio between reactive power consumption by rapid variable loads, such as electric arc furnaces and rolling mills, and short-circuit power of power supply networks from the standpoint of errors in calculation of the voltage fluctuation values. The appearance of errors caused by electromagnetic rapid and significant changes in magnitude of reactive power consumption of the above mentioned loads and the corresponding voltage fluctuations at different points in the power system. The transients of a turbogenerator with a typical diagram of its excitation control system and various mathematical models of generators were analyzed. The limiting ratio between the standard deviations of the reactive power consumption variations by the rapid variable loads and the power network parameter was evaluated. This value corresponds to the conditions, when it is possible to neglect the appearance of the electromagnetic transients in the power supply system generators during voltage fluctuation calculations at the connection point to the power network of the aforementioned loads.

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电力系统动态状态对高压配电网的影响

本文从电压波动值计算误差的角度出发，提出了一种估算电弧炉、轧机等快速变负荷的无功功耗与供电网络短路功率允许比值的方法。电磁引起的误差的出现，使上述负荷的无功耗量发生了迅速而显著的变化，并在电力系统的不同点产生了相应的电压波动。分析了汽轮发电机的暂态，给出了汽轮发电机励磁控制系统的典型图和各种数学模型。给出了快速变负荷无功功率变化的标准差与电网参数的极限比值。此值所对应的条件是，在上述负载的电网接入点进行电压波动计算时，可以忽略供电系统发电机中电磁瞬变的出现。

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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11th International Conference on Electrical Power Quality and Utilisation

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