Error analysis of the three-phase electrical energy calculation method in the case of voltage-loss failure

• Autorzy: Cheng Han-miao , Wang Zhong-dong , Cai Qi-xin , Lu Xiao-quan , Gao Yu-xiang , Song Rui-peng , Tian Zheng-qi , Mu Xiao-xing

Identyfikatory

DOI

10.24425/mms.2019.129575

• Języki publikacji: EN

Abstrakty

EN

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.

Słowa kluczowe

EN

three-phase electrical energy meter; voltage-loss failure; voltage substitution; three-phase voltage unbalance; calculation error

• Wydawca: Komitet Metrologii i Aparatury Naukowej PAN
• Czasopismo: Metrology and Measurement Systems
• Rocznik: 2019
• Tom: Vol. 26, nr 3
• Strony: 505--516
• Opis fizyczny: Bibliogr. 23 poz., rys., tab., wykr., wzory

Twórcy

autor

Cheng Han-miao

• State Grid Jiangsu Electric Power Company Limited Research Institute, 9, Aoti, Nanjing, China
• State Grid Key Laboratory of Electrical Power Metering, 9, Aoti, Nanjing, China

autor

Wang Zhong-dong

• State Grid Jiangsu Electric Power Company Limited Research Institute, 9, Aoti, Nanjing, China
• State Grid Key Laboratory of Electrical Power Metering, 9, Aoti, Nanjing, China

autor

Cai Qi-xin

• State Grid Jiangsu Electric Power Company Limited Research Institute, 9, Aoti, Nanjing, China
• State Grid Key Laboratory of Electrical Power Metering, 9, Aoti, Nanjing, China

autor

Lu Xiao-quan

• State Grid Jiangsu Electric Power Company Limited Research Institute, 9, Aoti, Nanjing, China
• State Grid Key Laboratory of Electrical Power Metering, 9, Aoti, Nanjing, China

autor

Gao Yu-xiang

• State Grid Jiangsu Electric Power Company Limited Research Institute, 9, Aoti, Nanjing, China
• State Grid Key Laboratory of Electrical Power Metering, 9, Aoti, Nanjing, China

autor

Song Rui-peng

• State Grid Jiangsu Electric Power Company Limited Research Institute, 9, Aoti, Nanjing, China
• State Grid Key Laboratory of Electrical Power Metering, 9, Aoti, Nanjing, China

autor

Tian Zheng-qi

• State Grid Jiangsu Electric Power Company Limited Research Institute, 9, Aoti, Nanjing, China
• State Grid Key Laboratory of Electrical Power Metering, 9, Aoti, Nanjing, China

autor

Mu Xiao-xing

• State Grid Jiangsu Electric Power Company Limited Research Institute, 9, Aoti, Nanjing, China
• State Grid Key Laboratory of Electrical Power Metering, 9, Aoti, Nanjing, China

Bibliografia

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Uwagi

EN

1. This work was supported by the State Grid Corporation of China (SGCC) Technology Project (grant # 5210EF18000J & grant # 5210EF17001M). The authors also would like to thank the reviewers and editors for their generous help.

PL

2. Opracowanie rekordu w ramach umowy 509/P-DUN/2018 ze środków MNiSW przeznaczonych na działalność upowszechniającą naukę (2019).