Multifunctional integrated high-pressure metering device

Abstract

A multifunctional integrated high-pressure metering device is used for improving metering precision, and the volume and cost of the device are reduced. The technical scheme is that the multifunctional integrated high-pressure metering device comprises a three-phase voltage mutual inductor, a three-phase current mutual inductor, a metering control circuit and a high-voltage switch controlled by anelectric operation mechanism; the three-phase voltage mutual inductor and the three-phase current mutual inductor respectively collect the voltage and current signals of a high-voltage power supply circuit; the metering signals outputted by the three-phase voltage mutual inductor and the three-phase current mutual inductor are connected to the signal input end of the metering control circuit; thehigh-voltage switch is serially connected in the high-voltage power supply circuit; the control end of the electric operation mechanism is connected to the control signal output end of the metering control circuit. The device of the invention is integrally designed; while the metering precision is improved, the repeated setting of functional elements is avoided, so that the volume of the meteringdevice is decreased, and the manufacture cost is reduced.

Description

technical field [0001] The invention relates to an electric energy metering device suitable for a 10kV high-voltage power supply line, which belongs to the field of metering technology. Background technique [0002] At present, the 10kV line metering device generally consists of 2 (or 3) 10kV electromagnetic voltage transformers, 2 (or 3) 10kV electromagnetic current transformers, an electronic three-phase watt-hour meter, "fee control" device, It is composed of 10kV switch and its electric operating mechanism, and all parts are installed separately and loosely combined. The 10kV electromagnetic voltage transformer converts the 10kV high voltage into a 100V low voltage output, and the 10kV electromagnetic current transformer converts the large current of the 10kV voltage level into a low voltage 5A current output. After the 100V voltage output by the voltage transformer is connected to the three-phase electric energy meter, one path is sent to the electric energy metering u...

AI Technical Summary

Problems solved by technology

Since the existing high-voltage metering equipment uses the same channel to measure the fundamental wave and harmonics, and the harmonic components are much smaller than the fundamental wave, the signal-to-noise ratio of the harmonic signals is very low, and it is impossible to treat them differently to achieve high-precision measurement

[0005] Electromagnetic current transformers use iron core materials. When the measured current contains a DC component, the secondary output is easily saturated, and the residual magnetism introduced by the DC component will cause measurement errors.

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