TY - GEN
T1 - Simulation of Residual Current in Low Voltage DC Systems
AU - Wang, Jing
AU - Xie, Zhimin
AU - Chen, Silei
AU - Li, Xingwen
N1 - Publisher Copyright:
© 2021 IEEE.
PY - 2021
Y1 - 2021
N2 - With the development of new energy industry, low voltage DC system (LVDC) has been developed rapidly in the municipal and residential field. DC residual current has become a key problem threatening the safe and stable operation of low voltage DC system. In the DC system, the voltage fluctuation generated by the rectifier and the system circulating net currents generated by the line with different positive and negative parameters would interfere with the detection of residual current operated protective devices (RCD). In this paper, the effects of current on human beings was analyzed firstly. Then the impedance model of human body was built for different electric shock conditions. Meanwhile, the representative electric shock simulation models of TN, TT and IT systems were established. And the characteristics of residual current caused by direct and indirect electric shock in different grounding modes were researched. Next, the influence of system factors on circulating net currents and the detection of residual current was analyzed. On this basis, the configurations of RCD in DC system were proposed finally, protecting human body from electric shock and preventing electric fire accident threats.
AB - With the development of new energy industry, low voltage DC system (LVDC) has been developed rapidly in the municipal and residential field. DC residual current has become a key problem threatening the safe and stable operation of low voltage DC system. In the DC system, the voltage fluctuation generated by the rectifier and the system circulating net currents generated by the line with different positive and negative parameters would interfere with the detection of residual current operated protective devices (RCD). In this paper, the effects of current on human beings was analyzed firstly. Then the impedance model of human body was built for different electric shock conditions. Meanwhile, the representative electric shock simulation models of TN, TT and IT systems were established. And the characteristics of residual current caused by direct and indirect electric shock in different grounding modes were researched. Next, the influence of system factors on circulating net currents and the detection of residual current was analyzed. On this basis, the configurations of RCD in DC system were proposed finally, protecting human body from electric shock and preventing electric fire accident threats.
KW - LVDC
KW - circulating net currents
KW - dc residual current
KW - simulation
UR - https://www.scopus.com/pages/publications/85124803150
U2 - 10.1109/HLM51431.2021.9671160
DO - 10.1109/HLM51431.2021.9671160
M3 - 会议稿件
AN - SCOPUS:85124803150
T3 - Electrical Contacts, Proceedings of the Annual Holm Conference on Electrical Contacts
SP - 81
EP - 88
BT - Proceedings of the 66th IEEE Holm Conference on Electrical Contacts, HLM 2021
PB - Institute of Electrical and Electronics Engineers Inc.
T2 - 66th IEEE Holm Conference on Electrical Contacts, HLM 2021
Y2 - 24 October 2021 through 27 October 2021
ER -