LUO SHANSHAN, DU XIAOTONG, ZHANG JUN, et al. Study on Propagation Law of Voltage Sags Through Multiple Grade Transformers. [J]. Power capacitor & reactive power compensation, 2019, 40(5): 170-175.
LUO SHANSHAN, DU XIAOTONG, ZHANG JUN, et al. Study on Propagation Law of Voltage Sags Through Multiple Grade Transformers. [J]. Power capacitor & reactive power compensation, 2019, 40(5): 170-175. DOI: 10.14044/j.1674-1757.pcrpc.2019.05.029.
电压暂降通过多级变压器的传播规律研究
摘要
本文根据电压暂降通过单个变压器的传播特性
推演得出了不同电压暂降类型在电网中经过多级任意类变压器的传播规律
并根据电压暂降经过不同变压器后的类型变化
推导得出了电压暂降在变压器两侧幅值简洁的变化关系。文章通过仿真对上述规律和关系进行了验证
所得结论将在判断电压暂降严重性、对负荷侧的影响、以及故障源追溯定位中发挥重要作用。
Abstract
In this paper
the propagation law through multiple grade transformers in the power grid is obtained by the deduction in accordance with the voltage sag propagation through single transformer.The simple variation relations of voltage sag of amplitude on both sides of transformer is deducted in accordance with type variation of voltage sag passing through different transformers.The above rule and relation are verified by the simulation in this paper and the conclusion plays an important role in judging the severity of voltage sags and locating the fault sources.