System and method for checking error of high-voltage electric energy measurement device

Abstract

The invention discloses a system and a method for checking the error of a high-voltage electric energy measurement device. The system comprises a test power source, a standard electric energy measurement system and a comparison display, wherein the error of the high-voltage electric energy measurement device is checked in the field by using the high-voltage current of the test power source, whichis generated by using three-phase high voltage as the test voltage of the test power source to carry out the high-potential clamping process on two / three groups of test current respectively, to excite the measurement device to be checked, and comparing the response output of the measurement device to be checked with that of the standard electric energy measurement system. The measurement system comprises a voltage sensor, a current sensor and a standard electric energy meter. The method comprises the following steps: determining the error of the system in measurement accuracy by the standard electric energy measurement system; and calculating the overall error according to the limit of the error, so as to control the requirements for the lowest accuracy level. The system of the invention is capable of determining the overall measurement accuracy (0.1) of the high-voltage electric energy measurement device to be checked.

Description

technical field [0001] The invention relates to a measurement calibration technology of electric equipment, in particular to a system and method for on-site error calibration of a high-voltage electric energy measurement device. Background technique [0002] High-voltage electric energy metering device is an important electric energy metering instrument, mainly composed of voltage transformer, current transformer and low-voltage multifunctional electric energy meter. In the design and production process of the electric energy metering device, the error of the components that make up the metering device is fixed, and the accuracy of this kind of metering equipment can be regulated by using the routine method, that is, the comprehensive error method. Therefore, for the on-site calibration of the electric energy metering device The test can only use different calibration equipment to obtain the error of the voltage transformer, current transformer and electric energy meter and ...

AI Technical Summary

Problems solved by technology

[0007] In view of this, the main purpose of the present invention is to provide an error checking system and method for a high-voltage electric energy metering device, so as to solve the defects that the accuracy level of the entire system cannot be calibrated and error checking can be performed during the verification process of the current electric energy metering device; And solve the portability problem of described error checking system

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