失压情况下三相电能计算方法的误差分析

IF 1 4区 工程技术 Q4 INSTRUMENTS & INSTRUMENTATION Metrology and Measurement Systems Pub Date : 2023-07-20 DOI:10.24425/mms.2019.129575
Han-miao Cheng, Zhongqiu Wang, Qinqin Cai, XiaoPeng Lu, Yunbo Gao, Ruihua Song, Zhengqi Tian, Xiao-xing Mu
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引用次数: 0

摘要

单相电压损失是一种常见的故障。一旦发生失压故障,将不测量电能的多少,但要计算电能的多少,以保护供电方的利益。介绍了电力代换法和电压代换法两种自动计算方法。针对电压代换法计算误差缺乏定量分析的问题,采用网格遍历法和MATLAB工具进行求解。理论分析表明,计算误差与电压不平衡因素和功率因素密切相关,在电力系统正常运行时,最大计算误差约为6%。为了验证理论分析,研制了两种三相电能计量装置,并在实验室和现场条件下进行了验证试验。室内试验结果与理论结果一致,现场试验结果表明,计算误差一般在0.2%以下,大多数情况下是正确的。
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Error analysis of the three-phase electrical energy calculation method in the case of voltage-loss failure
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.
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来源期刊
Metrology and Measurement Systems
Metrology and Measurement Systems INSTRUMENTS & INSTRUMENTATION-
CiteScore
2.00
自引率
10.00%
发文量
0
审稿时长
6 months
期刊介绍: Contributions are invited on all aspects of the research, development and applications of the measurement science and technology. The list of topics covered includes: theory and general principles of measurement; measurement of physical, chemical and biological quantities; medical measurements; sensors and transducers; measurement data acquisition; measurement signal transmission; processing and data analysis; measurement systems and embedded systems; design, manufacture and evaluation of instruments. The average publication cycle is 6 months.
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