Development of Electric Shock Prevention Systems for Photovoltaic Solar Systems using Electromagnetic Relay

Development of Electric Shock Prevention Systems for Photovoltaic Solar Systems using Electromagnetic Relay
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利用电磁继电器开发光伏太阳能系统防触电系统

DOI:
10.1109/pvsc43889.2021.9518727
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发表时间:
2021
期刊:
Proceedings of 2021 IEEE 48th Photovoltaic Specialists Conference (PVSC)
影响因子:
--
通讯作者:
Okamoto Masayuki
Okamoto Masayuki
中科院分区:
--
文献类型:
--
作者:
Hamada Toshiyuki;Yoneda Shinnosuke;Nakamoto Kenta;Okamoto Masayuki

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光伏系统(PVS)作为一种清洁的可回收能源而广受欢迎,因为它们通过光照射产生电力。然而,PVS 的这一优势在遇到故障时可能会导致问题。例如,安装有 PVS 的建筑物发生火灾可能会导致在现场工作的消防员触电。当散落的 PV-mdls 被移除(例如从地面)时,在风灾期间被吹走的光伏组件 (PV-mdls) 可能会造成危害,因为它们可能会对移除或清理散落的 PV-mdls 的人员造成电击。因此,在本文中,我们提出了一种可以防止PVS引起的触电的系统,可以应对火灾和风灾时的故障。所提出的系统使用电磁继电器,该继电器会导致沿 PV-mdl 串并联断开和短路。实验测试表明,该系统运行成功,并且可以将PVS电压降低到紧急情况下无触电风险的水平。
Photovoltaic systems (PVSs) have gained popularity as a clean recyclable source of energy because they generate electric power from light irradiation. However, this advantage of PVSs can lead to problems when they experience failures. For example, a fire in a building installed with PVSs can cause electric shock to firefighters working at the site. PV modules (PV-mdls) blown away during wind disasters are potentially harmful when the scattered PV-mdls are removed (e.g., from the ground), as they can cause electric shock to those who remove or clean up the scattered PV-mdls. Therefore, in this paper, we propose a system that can prevent the electric shock due to PVSs, which can cope with failures in case of fire and wind disasters. The proposed system uses an electromagnetic relay that causes a parallel disconnection and short-circuit along a PV-mdl string. The experimental tests show that the proposed system operates successfully, and the PVS voltage can be reduced to a level in which there is no risk of electric shock in case of emergencies.
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