A kind of electric energy performance field quantity value transmission device
A transmission device, electric energy meter technology, applied in the direction of measuring devices, measuring electrical variables, instruments, etc., can solve the problems of portable calibrator that cannot guarantee accuracy, impossible inspection, large accuracy error, etc., and achieve good application prospects, reliable High performance and high stability
Active Publication Date: 2016-08-17
STATE GRID CORP OF CHINA +2
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Problems solved by technology
Usually, the laboratory test can obtain the specified accuracy index, while the error of the accuracy of the on-site test is generally relatively large, and it may be difficult to determine under some conditions; the laboratory test will simulate various situations according to the test regulations, such as Different loads, in a short period of time, conduct a comprehensive inspection of the characteristics of the inspected instrument, and make a qualified or unqualified judgment based on this; but on-site verification, there is only one working condition, and it is impossible to conduct a comprehensive inspection
[0004] In view of the large difference between the on-site test environment and the laboratory for on-site verification, and the electric energy meter must work under the field conditions, the portable calibrator passed through the laboratory value cannot guarantee the same accuracy in the field, and the work of the electric energy meter in the field To what extent is the ability accurate? It has become an important issue that has been widely concerned.
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[0022] The present invention will be further described below in conjunction with the accompanying drawings. The following examples are only used to illustrate the technical solution of the present invention more clearly, but not to limit the protection scope of the present invention.
[0023] Such as figure 1 As shown, the electric energy meter field value transmission device of the present invention has high precision, high stability, high reliability, standardization, digitalization, high stability, and high reliability, and specifically includes a sampling circuit, a variable gain amplifier circuit, and an AD conversion circuit. , a microprocessor and an industrial computer, the sampling circuit is externally connected to the three-phase voltage and current output terminals of the on-site electric energy meter, and the output terminal of the sampling circuit is connected to the microprocessor through a variable gain amplifier circuit and an AD conversion circuit in turn, T...
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The invention discloses an on-site quantity transmission device for an electric energy meter. The on-site quantity transmission device comprises a sampling circuit, a variable gain amplification circuit, an AD conversion circuit, a microprocessor and an industrial personal computer. The sampling circuit is externally connected with the three-phase voltage and the current output end of the on-site electric energy meter, and the output end of the sampling circuit is connected with the microprocessor through the variable gain amplification circuit and the AD conversion circuit. The on-site quantity transmission device for the electric energy meter can accurately reflect the work condition of the on-site electric energy meter, and is high in accuracy, stability and reliability and good in application prospect.
Description
technical field [0001] The invention relates to an electric energy display field value transmission device, which belongs to the technical field of digital electric energy measurement. Background technique [0002] In the international recommendations and verification regulations for electric energy meters, it is stipulated that the verification of electric energy meters is carried out under laboratory conditions. , conduct item-by-item tests on the checked meter, and make a qualified or unqualified judgment based on the test results; on-site verification generally refers to carrying a standard meter to the site, inserting the standard meter into the power grid close to the checked meter, and comparing the tested meter. The electric energy reading of the inspected meter and the standard meter in the same time, so as to obtain the error of the inspected meter. [0003] Laboratory verification is usually carried out under controlled conditions including temperature, humidity,...
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IPC IPC(8): G01R35/04
Inventor 杨世海卢树峰赵双双徐敏锐陈铭明吴桥纪峰
Owner STATE GRID CORP OF CHINA