Analysis of the impact of nonlinear distortion in voltage and current curves on the errors of electric energy metering devices

2017 ◽  
Author(s):  
Gyorgy Morva ◽  
Vitalii Volokhin ◽  
Illia Diahovchenko ◽  
Zsolt Conka
Keyword(s):  
Nonlinear Distortion ◽  
Electric Energy ◽  
Energy Metering ◽  
The Impact

Study on Electric Energy Metering Program under the Impact of Distorted Waveform

2013 ◽  
Vol 732-733 ◽  
pp. 948-953
Author(s):  
Ji Lun Ba ◽  
Hai Ming Wang ◽  
Meng Yao ◽  
Xiao Lei Deng ◽  
Xiang Fang ◽  
...  
Keyword(s):  
Electric Energy ◽  
Equivalent Circuit Model ◽  
Electronic Energy ◽  
Measuring Process ◽  
Nonlinear Load ◽  
Energy Meter ◽  
Simulink Simulation ◽  
Energy Metering ◽  
The Common ◽  
The Impact

Many factors affect the precision of electric energy metering in measuring process, and distorted waveform is one of them. Based on maths principle and equivalent circuit model, the metering error related to electronic energy meter algorithm (metering principle), current transformers and voltage transformers is analyzed. Corresponding improvement metering scheme is put forward. Finally, taking the common nonlinear load-AC EFA (electric arc furnace) as an example, it is simulated in the MATLAB/Simulink simulation platform. The results validate the conclusions of the error analysis and some methods proposed to improve the rationality of actual metering operation significantly.

Research on the Impact of Power Grid Harmonic on Energy Meter and its Solution Methods

2014 ◽  
Vol 700 ◽  
pp. 88-93 ◽  
Author(s):  
Hao Chen ◽  
Zhi Kun Luo ◽  
Chao Long Ou ◽  
Fu Sheng Chen ◽  
Jie Xiang ◽  
...  
Keyword(s):  
Power Grid ◽  
Electric Energy ◽  
Nonlinear Load ◽  
Energy Meter ◽  
Linear Load ◽  
Energy Metering ◽  
Solution Methods ◽  
New Type ◽  
Measurement Principle ◽  
The Impact

This paper presents a power consumption model with harmonics existing in power system, the influence of harmonic linear load and the influence of nonlinear load energy metering is discussed, then the analysis of the impact of the harmonic of induction watt-hour meter and electronic watt-hour meter measurement features is given. In the next part, the measurement principle of harmonic watt-hour meter is introduced, and a new type of electric energy metering scheme based on harmonic watt-hour meter is given, so that the electric energy metering fairness problem caused by power grid harmonic will be solved effectively.

Research the Test Method of the Voltage Transformer Secondary Load in the Three-Phase Three-Wire Electric Energy Metering Device

2014 ◽  
Vol 687-691 ◽  
pp. 3110-3115
Author(s):  
Gu Li ◽  
Zi Ming Fu ◽  
Jie Feng Yan ◽  
Bing Wen Li ◽  
Zhi Rong Cen
Keyword(s):  
Power Supply System ◽  
Electric Energy ◽  
Test Methods ◽  
Test Method ◽  
Testing Methods ◽  
Voltage Transformer ◽  
Secondary Load ◽  
Three Phase ◽  
Energy Metering ◽  
Definition Of

This paper analyzes and studies the definition of the voltage transformer secondary load, examines the practical purposes of the measured values of the voltage transformer secondary load, and presents a variety of testing methods to analyze and compare the differences. This paper gives the test methods of the voltage transformer secondary load when the connection of the voltage transformer is the Y / Y in a three-phase three-wire power supply system, filling the blank of this type of test method in the industry. When other units within the industry carry out such work, the conclusions of this paper are available for reference, and the conclusions of this paper can be referred when drafting relevant regulations in the future.

scholarly journals Electrical Harmonic Energy Measurement Based on Wavelet Packet Decomposition and Reconstruction Algorithm

2021 ◽  
Author(s):  
Mengshuang Liu ◽  
Xudong Shi ◽  
Chen Yang
Keyword(s):  
Virtual Instrument ◽  
Reactive Power ◽  
Simulation Analysis ◽  
Wavelet Packet ◽  
Electric Energy ◽  
Reconstruction Algorithm ◽  
Energy Measurement ◽  
Fundamental Wave ◽  
Wavelet Packet Decomposition ◽  
Energy Metering

In order to study the accurate measurement of electric energy in complex industrial field, a method of harmonic electric energy measurement based on wavelet packet decomposition and reconstruction algorithm, as well as the calculation formula of harmonic power and the principle of harmonic electric energy measurement are proposed. Using db42 wavelet function to carry out harmonic energy metering simulation analysis, the results show that: The fundamental frequency of the simulation signal is 50 Hz, two-layer wavelet packet transform is adopted, the simulation input signals within 40 fundamental wave cycles are taken, and the sampling frequency fs is 800 Hz. Conclusion: The three-phase harmonic energy metering device based on virtual instrument technology has realized the measurement of each harmonic active power and reactive power, and the accuracy reaches 0.2 s.

scholarly journals The Impact Assessment of Campus Buildings Based on a Life Cycle Assessment–Life Cycle Cost Integrated Model

2019 ◽  
Vol 12 (1) ◽  
pp. 294 ◽  
Author(s):  
Zhuyuan Xue ◽  
Hongbo Liu ◽  
Qinxiao Zhang ◽  
Jingxin Wang ◽  
Jilin Fan ◽  
...  
Keyword(s):  
Life Cycle Assessment ◽  
Life Cycle ◽  
Environmental Impacts ◽  
Life Cycle Cost ◽  
Electric Energy ◽  
Integrated Model ◽  
Economic Costs ◽  
Analytic Hierarchy ◽  
The Sustainable Development ◽  
The Impact

The development of higher education has led to an increasing demand for campus buildings. To promote the sustainable development of campus buildings, this paper combines social willingness-to-pay (WTP) with the analytic hierarchy process (AHP) based on the characteristics of Chinese campus buildings to establish a life cycle assessment–life cycle cost (LCA–LCC) integrated model. Based on this model, this paper analyses the teaching building at a university in North China. The results show that the environmental impacts and economic costs are largest in the operation phase of the life cycle, mainly because of the use of electric energy. The environmental impacts and economic costs during the construction phase mainly come from the building material production process (BMPP); in this process, steel is the main source. Throughout the life cycle, abiotic depletion-fossil fuel potential (ADP fossil) and global warming potential (GWP) are the most prominent indexes. Further analysis shows that these two indexes should be the emphases of similar building assessments in the near future. Finally, this study offers suggestions for the proposed buildings and existing buildings based on the prominent problems found in the case study, with the aim to provide reference for the design, construction, and operation management of similar buildings.

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