Calibration apparatus for gate energy meter of digitized transforming plant

Abstract

The invention relates to a verifying unit of a digital substation pass electric energy meter. The primary side of a standard voltage transformator and the primary side of a high-voltage standard current transformator are respectively connected with the secondary side of a high-voltage testing transformer and a high-voltage booster, and the secondary sides of the standard voltage transformator and the high-voltage standard current transformator are connected with a single-phase standard electric energy meter; the secondary sides of the high-voltage booster and the high-voltage testing transformer are connected with a current sensor and a voltage sensor of an electronic transformator; the electronic transformator also comprises a primary converter unit and a merging unit; the current sensor and the voltage sensor are connected in parallel and connected to the primary converter unit; the primary converter unit is connected with the merging unit; the outlet of the merging unit is connected with a network electric energy meter; and the network electric energy meter and the single-phase standard electric energy meter are together connected to an electric energy error calculator. Due to the adoption of the invention, the error of the digital substation pass electric energy meter can be obtained without paying attention to the error of the merging unit of the electronic transformator and the error of the network electric energy meter; in addition, the magnitude of error of the digital substation pass electric energy meter can reach the nation standard.

Description

technical field [0001] The invention relates to a high-voltage electric energy metering device, in particular to a digital substation gateway electric energy meter calibration device, which belongs to the technical field of high-voltage electric energy metering. Background technique [0002] Power companies usually set up energy metering gateways in 110kV and above substations. The energy metering gateway of the traditional substation is to send the six-channel signals of the secondary side of three voltage transformers and three current transformers at an interval of the transmission line to a three-phase four-wire electric energy meter for measurement, and obtain it by the method of instantaneous power integration The energy value of the gate. The inspection method of this high-voltage electric energy metering device is to measure the errors of three voltage transformers and three current transformers according to the national metrology verification regulations JJG 1021-2...

AI Technical Summary

Problems solved by technology

Although the error of the merging unit of the electronic transformer can be verified, the error of the network electric energy meter belongs to software technology and cannot be used as a measuring instrument for verification

Images