Device for detecting electric energy meter error under harmonic condition by adopting watt-second method, and detecting method
A technology of electric energy meters and harmonics, applied in the direction of measuring devices, measuring electric variables, instruments, etc., can solve the problems of inability to trace the source of energy values, accurate errors of standard electric energy meters, and non-traceable errors of standard electric energy meters, etc., and achieve good application and promotion prospects , The effect of high performance and price
Active Publication Date: 2010-06-30
ELECTRIC POWER RESEARCH INSTITUTE OF STATE GRID SHANDONG ELECTRIC POWER COMPANY +1
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Problems solved by technology
The premise of using this method is to ensure that the error of the standard electric energy meter is accurate under the harmonic condition, but at present, the measurement transmission work of the standard electric energy meter under the harmonic condition has not been carried out in my country, and the error of the standard electric energy meter under the harmonic condition cannot be traced.
This method has the defect of not being able to trace the energy value
Method used
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example 1
[0048] Example 1 Working Principle of Harmonic Simulation Test of Electrified Railway Traction Locomotive Passing
[0049] The fundamental voltage, current and power factor of an electrified traction locomotive passing through are shown in Table 1, and the harmonic voltage, current and phase angle are shown in Table 2. Input the data in Table 1 and Table 2 to the 6101A harmonic power source, and the harmonic power source sends the output harmonic voltage and harmonic current to the tested electric energy meter, and the electric energy pulse output by the tested electric energy meter is detected by the photoelectric sampler Then send it to the error calculator. The error calculator receives the electric energy pulses output by the photoelectric sampler and detects the N low-frequency electric energy pulses output by the standard timer at the same time. According to the formula (1) and formula (2), the computer controls the error calculator to automatically detect the error of ...
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The invention discloses a device for detecting an electric energy meter error under a harmonic condition by adopting a watt-second method, and a detecting method. The device has the advantages of simple structure, convenient use, lower cost and the like and comprises a harmonic power source, wherein a harmonic voltage and a harmonic current are sent into a detected electric energy meter through the harmonic power source, an electric energy meter pulse is sent into a photoelectric sampler through the detected electric energy meter, the photoelectric sampler is connected with an error arithmetic unit, and meanwhile, a time signal of a standard time measurer is collected through the error arithmetic unit and controlled through computer software, and the electric energy meter error can be automatically detected under the harmonic condition.
Description
technical field [0001] The invention relates to a device and a detection method for detecting errors of electric energy meters under harmonic conditions by using a watt-second method. Background technique [0002] In recent years, with the advancement of science and technology, new types of electrical equipment have been put into use, and a large number of harmonic source equipment has been connected to the power grid, which has seriously "polluted" the power grid. , System reactive power compensation and other serious interference and impact, pose a great threat to the safe operation of the power grid and the safe use of electricity by the majority of users. [0003] In order to study the influence of harmonic conditions on the error of the electric energy meter, the standard meter method is traditionally used to detect the error of the electric energy meter under the harmonic condition, that is, the electric energy containing harmonics measured by the standard electric ene...
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Inventor 王运全徐民代燕杰岳巍宋光清徐新光张红夏卓明
Owner ELECTRIC POWER RESEARCH INSTITUTE OF STATE GRID SHANDONG ELECTRIC POWER COMPANY