TY - JOUR
N2 - The single-phase voltage loss is a common fault. Once the voltage-loss failure occurs, the amount of electrical energy will not be measured, but it is to be calculated so as to protect the interest of the power supplier. Two automatic calculation methods, the power substitution and the voltage substitution, are introduced in this paper. Considering the lack of quantitative analysis of the calculation error of the voltage substitution method, the grid traversal method and MATLAB tool are applied to solve the problem. The theoretical analysis indicates that the calculation error is closely related to the voltage unbalance factor and the power factor, and the maximum calculation error is about 6% when the power system operates normally. To verify the theoretical analysis, two three-phase electrical energy metering devices have been developed, and verification tests have been carried out in both the lab and field conditions. The lab testing results are consistent with the theoretical ones, and the field testing results show that the calculation errors are generally below 0.2%, that is correct in most cases.
L1 - http://journals.pan.pl/Content/113094/PDF/05_MMS_3_INTERNET.pdf
L2 - http://journals.pan.pl/Content/113094
PY - 2019
IS - No 3
EP - 516
DO - 10.24425/mms.2019.129575
KW - three-phase electrical energy meter
KW - voltage-loss failure
KW - voltage substitution
KW - three-phase voltage unbalance
KW - calculation error
A1 - Cheng, Han-miao
A1 - Wang, Zhong-dong
A1 - Cai, Qi-xin
A1 - Lu, Xiao-quan
A1 - Gao, Yu-xiang
A1 - Song, Rui-peng
A1 - Tian, Zheng-qi
A1 - Mu, Xiao-xing
PB - Polish Academy of Sciences Committee on Metrology and Scientific Instrumentation
VL - vol. 26
T1 - Error analysis of the three-phase electrical energy calculation method in the case of voltage-loss failure
DA - 2019.09.23
SP - 505
UR - http://journals.pan.pl/dlibra/publication/edition/113094
T2 - Metrology and Measurement Systems
ER -