Study on residual current protection in low-voltage network with distributed generators

Li, BoTong; Jia, JianFei; Chen, Xiaolong; Xue, Shimin

doi:10.1109/appeec.2016.7779543

Cited by 4 publications

(1 citation statement)

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“…An extremely important and difficult issue in the context of the use of protections is the selection of appropriate residual current devices (RCDs), which is carried out to protect against electric shock, as well as against fire. The selection of RCDs is difficult due to the use of many power sources in the network [122], and mainly due to the possibility of the appearance of a DC component [123] and higher harmonics [124,125] in the earth fault current. This applies in particular to PV installations [126,127] and electric vehicle charging installations [128,129].…”

Section: Challenges In the Field Of Electrical Protections In Network...mentioning

confidence: 99%

Trends in Locally Balanced Energy Systems without the Use of Fossil Fuels: A Review

2023

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In recent years, the idea of the operation of energy systems (power systems, heating systems) has changed significantly. This paper is an overview of locally balanced energy systems without the use of fossil fuels. The paper justifies the concept of local energy balancing in a new energy system that does not use fossil fuels (coal, natural gas, and crude oil), based on European Union guidelines and formal documents as well as the literature on the subject. In this context, the issue of local energy self-sufficiency, utilizing renewable energy sources, as well as the concept of local smart grids based on innovative market mechanisms are raised. Attention is also paid to technical issues with regard to locally balanced energy systems, in particular photovoltaic sources and energy storage. Challenges related to the use of electrical protection in networks with many sources of energy are described. In such networks, the power flow is not in one direction only. Moreover, the selection of protections is problematic due to the distribution of short-circuit currents. Additionally, earth fault currents in such networks may be distorted, and this negatively affects the operation of residual current devices. The basic nomenclature describing locally balanced systems has been sorted out as well. Finally, possible future research paths in the field of creating locally balanced systems without the use of fossil fuels are presented.

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