LAI Chengzhong,ZHONG Qing,ZHAO Yuming,et al.Risk Assessment Method for Electric Shock of Electrical Equipment in Low-voltage DC Power Supply System[J].Automation of Electric Power Systems,2021,45(19):141-147.
LAI Chengzhong,ZHONG Qing,ZHAO Yuming,et al.Risk Assessment Method for Electric Shock of Electrical Equipment in Low-voltage DC Power Supply System[J].Automation of Electric Power Systems,2021,45(19):141-147. DOI: 10.7500/AEPS20210125002.
Risk Assessment Method for Electric Shock of Electrical Equipment in Low-voltage DC Power Supply System
The electric shock risk of the low-voltage direct current (LVDC) power supply system needs to be quantified by appropriate assessment methods. First
this paper analyzes the electric shock risk points of LVDC based on the combination of safety elements for electrical equipment and the characteristics of LVDC power supply systems. Then
a 5-level electric shock risk assessment model is established for electrical equipment of LVDC power supply system that integrates three elements: severity of injury
possibility of exposure to hazards and limitation of injury possibility. The assessment model maps the combination of the three input parameters into a 5-level electric shock risk assessment result. Finally
the effectiveness of the proposed method is verified by using different voltage levels of equipment in the actual system as an example.
ZENG Rong , ZHAO Yuming , ZHAO Biao , et al . A prospective look on research and application of DC power distribution technology [J]. Proceedings of the CSEE , 2018 , 38 ( 23 ): 6791 - 6801 .
YE Chang , MIAO Shihong , LI Yaowang , et al . Robust optimal scheduling for active distribution network based on improved uncertain boundary [J]. Transactions of China Electrotechnical Society , 2019 , 34 ( 19 ): 4084 - 4095 .
SUN Guoqiang , CHEN Sheng , ZHENG Yuping , et al . Available transfer capability calculation considering electricity and natural gas coupled energy system security constrains [J]. Automation of Electric Power Systems , 2015 , 39 ( 23 ): 26 - 32 .
YIN Shugang , LIU Jianming , ZHAO Xianlong , et al . A low-voltage DC power supply technology based integrated system for urban street lighting and charging piles for electric vehicles [J]. Power System Technology , 2014 , 38 ( 3 ): 571 - 575 .
LUO Zhigang , WEI Gang , YUAN Hongtao , et al . Comprehensive decision of DC distribution network planning based on interval intuitionistic fuzzy theory [J]. Transactions of China Electrotechnical Society , 2019 , 34 ( 10 ): 2011 - 2021 .
SHENG Wanxing , LI Rui , LI Yue , et al . A preliminary study on voltage level sequence and typical network architecture of direct current distribution network [J]. Proceedings of the CSEE , 2016 , 36 ( 13 ): 3391 - 3403 .
General Administration of Quality Supervision , Inspection and Quarantine of the People's Republic of China , Standardization Administration of the People's Republic of China . Effects of current on human beings and livestock: Part one general aspects GB/T 13870.1—2008 [S]. Beijing : Standards Press of China , 2009 .
General Administration of Quality Supervision , Inspection and Quarantine of the People's Republic of China , Standardization Administration of the People's Republic of China . Guidelines for safety related risk assessment and risk reduction for low voltage equipment GB/T 34924—2017 [S]. Beijing : Standards Press of China , 2017 .
DRAGIČEVIĆ T , LU X N , VASQUEZ J C , et al . DC microgrids: Part Ⅰ a review of control strategies and stabilization techniques [J]. IEEE Transactions on Power Electronics , 2016 , 31 ( 7 ): 4876 - 4891 .
DRAGIČEVIĆ T , LU X N , VASQUEZ J C , et al . DC microgrids: Part Ⅱ a review of power architectures, applications, and standardization issues [J]. IEEE Transactions on Power Electronics , 2016 , 31 ( 5 ): 3528 - 3549 .
MA Zhao , ZHAO Zhigang , SUN Yuanyuan , et al . Key technologies and development prospect of new generation low-voltage DC power supply and utilization system [J]. Automation of Electric Power Systems , 2019 , 43 ( 23 ): 12 - 22 .
WANG B , DEHGHANIAN P , WANG S Y , et al . Electrical safety considerations in large-scale electric vehicle charging stations [J]. IEEE Transactions on Industry Applications , 2019 , 55 ( 6 ): 6603 - 6612 .
NAZIR M , BURKES K , ENSLIN J H . Electrical Safety considerations of neutral blocker placements for mitigating DC [J]. IEEE Transactions on Industry Applications , 2021 , 57 ( 1 ): 1113 - 1121 .
YONG Jing , LI Lulu , WANG Xiaojing , et al . Theoretical analysis on the protection properties against electric shock of low voltage DC distribution system with different grounding types [J]. Journal of Chongqing University , 2013 , 36 ( 11 ): 21 - 26 .
LI Lulu , YONG Jing , ZENG Liqiang , et al . Researches on grounding types of low-voltage DC bipolar distribution systems [J]. Proceedings of the CSEE , 2014 , 34 ( 13 ): 2210 - 2218 .
LEE C H , MELIOPOULOS A P S . Safety assessment of AC grounding systems based on voltage-dependent body resistance [J]. IEEE Transactions on Industry Applications , 2015 , 51 ( 6 ): 5204 - 5211 .
任昭颖 . 民用建筑安全电压直流供电技术研究 [D]. 北京 : 北京交通大学 , 2020 .
REN Zhaoying . Research on the technology of DC power supply at safety voltage for civil buildings [D]. Beijing : Beijing Jiaotong University , 2020 .
International Electrotechnical Commission . IEC 60479-1 effects of current on human beings and livestock: Part 1 general aspects [S]. Geneva, Switzerland : IEC , 2005 .
ZHONG Qing , FENG Junjie , WANG Gang , et al . Analysis on high frequency resonance characteristics of distribution network with multiple voltage source converters [J]. Automation of Electric Power Systems , 2017 , 41 ( 5 ): 99 - 105 .
Ministry of Housing and Urban-Rural Development of the People's Republic of China . Code for electrical design of civil buildings JGJ 16—2008 [S]. Beijing : China Architecture & Building Press , 2008 .