Probability of Voltage Sags Depending on the Characteristics of Medium Voltage Networks
Probability of Voltage Sags Depending on the Characteristics of Medium Voltage Networks
复制标题
电压暂降的概率取决于中压网络的特性
DOI：
10.1109/pmaps.2006.360348
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发表时间：
2006
期刊：
影响因子：
--
通讯作者：
M. Lehtonen
中科院分区：
文献类型：
--
作者：
P. Heine;M. Lehtonen
本文介绍了如何中压（MV）网络的特点影响的概率，电压骤降经历的低压客户。在中压级中发生的故障通常是电压暂降的重要来源。因此，当旨在降低凹陷概率时，本地MV网络的特性具有重要作用。本文集中讨论网络组件和连接的各种传统解决方案。自备一次Transformer和中压网络，地下电缆的馈线长度最短，是对下垂敏感的客户的上级解决方案。在架空线中压网络的情况下，电涌放电器应用于杆上配电变压器的过电压保护。令人惊讶的是，并非配电网整体发展的所有阶段都导致电压骤降的可能性较低。混合架空/地下电缆-中压网络和配电自动化的某些阶段包括需要仔细分析下垂的特征
This paper presents how the characteristics of medium voltage (MV) networks affect the probability of the voltage sags experienced by a low voltage customer. Faults occurring in the MV level are typically an important origin of voltage sags. Thus, when aiming to lower the sag probability the characteristics of the local MV network have an important role. This paper concentrates to various conventional solutions of network components and connections. An own primary transformer and an MV network with underground cables of minimum feeder lengths is a superior solution for a sag-sensitive customer. In a case of overhead line MV networks, surge arresters should be used for overvoltage protection of pole-mounted power distribution transformers. Surprisingly, not necessarily all stages of the overall development of power distribution networks result to a lower probability of voltage sags. Mixed- overhead/underground cable-MV networks and some stages of distribution automation included characteristics that need a careful sag analysis