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A Study on the Comprehensive Error of Electric Energy Metering Systems and Its Application

Author: LiShouMin
Tutor: LiuHuaiDong；ZhangAiMin
School: Tianjin University
Course: Electrical Engineering
Keywords: Energy Measurement Comprehensive error Transformer PT secondary voltage drop Secondary load
CLC: TM933.4
Type: Master's thesis
Year: 2009
Downloads: 69
Quote: 0
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Abstract


Advantage of its broad power to become the national economy and people's lives the most important energy sources. Electric energy metering energy management is an important task in the fair , accurate and reliable is directly related to power generation, electricity supply and the economic interests of constituents . In a market economy conditions, reducing energy measurement system integrated error , it is particularly important to improve its accuracy . Papers on electric energy metering system components and their requirements are discussed, Daqing Oilfield introduced some domestic power grids and energy metering the status quo, the current electricity power system caused by inaccurate measurement of the main factors in depth analysis . Meanwhile, the Daqing Oilfield grid 110kV, 35kV, 6kV three different voltage levels and other energy metering system for a transformer angle worse than poor test voltage transformer secondary voltage drop test meter error test , the transformer secondary actual load testing, field testing , and field testing conditions and test methods for a more detailed description . Finally, through the establishment of integrated energy metering system error analysis data model , on-site test data is analyzed and calculated to obtain a composite error transformers and metering systems integration error data . The results show that excessive voltage transformer secondary voltage drop ( voltage transformer isolation switch auxiliary contacts circuit voltage drop caused by the drop accounted for 30% to 80% ) , excessive current transformer secondary load is affecting the current field grid power measurement system accuracy two most important factor. Papers presented for the problems identified ways to improve energy metering accuracy and specific measures .

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CLC: > Industrial Technology > Electrotechnical > Electrical measurement techniques and instruments > Power the number of measurements and instrumentation > Power measurement,power meter
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