TY - JOUR
T1 - Novel differential protection based on the ratio of model error indices in time-domain for transmission cable system
AU - Ma, Kaiqi
AU - Liu, Zhou
AU - Bak, Claus Leth
AU - Chen, Zhe
PY - 2020/3
Y1 - 2020/3
N2 - The significant shunt parameters of underground cable (UC) systems, as well as the frequently-used shunt reactor, draw many attentions in the implementation of the differential relay. In this paper, a novel ratio of model error indices (RMEIs) based differential protection (RMEIDP) scheme is proposed. The internal/external faults lead to different fault component networks, from which the proposed RMEIDP distinguishes the fault states by identifying the corresponding fault component models. The RMEIDP scheme, incorporating both the external fault differential model and the internal one, is theoretically unaffected by the cable charging current and weakens the impacts of shunt reactor. What’s more, the proposed RMEIDP scheme is adaptive for not only the fault steady state but also the fault transient state, since the time-domain fault information is directly used in the model error index (MEI) computation. DIgSILENT-based EMT simulation results of the UC transmission system prove the effectiveness and merits of the new differential relay scheme.
AB - The significant shunt parameters of underground cable (UC) systems, as well as the frequently-used shunt reactor, draw many attentions in the implementation of the differential relay. In this paper, a novel ratio of model error indices (RMEIs) based differential protection (RMEIDP) scheme is proposed. The internal/external faults lead to different fault component networks, from which the proposed RMEIDP distinguishes the fault states by identifying the corresponding fault component models. The RMEIDP scheme, incorporating both the external fault differential model and the internal one, is theoretically unaffected by the cable charging current and weakens the impacts of shunt reactor. What’s more, the proposed RMEIDP scheme is adaptive for not only the fault steady state but also the fault transient state, since the time-domain fault information is directly used in the model error index (MEI) computation. DIgSILENT-based EMT simulation results of the UC transmission system prove the effectiveness and merits of the new differential relay scheme.
KW - Underground cable
KW - Differential protection
KW - Fault transient
KW - Ratio of model error indices
KW - Shunt reactor
KW - Time-domain
UR - http://www.scopus.com/inward/record.url?scp=85075457665&partnerID=8YFLogxK
U2 - 10.1016/j.epsr.2019.106077
DO - 10.1016/j.epsr.2019.106077
M3 - Journal article
SN - 0378-7796
VL - 180
JO - Electric Power Systems Research
JF - Electric Power Systems Research
M1 - 106077
ER -