Distribution transformer terminal power consumption measuring circuit and distribution transformer terminal

A distribution transformer terminal and measurement circuit technology, which is applied in the measurement of electrical variables, electrical power, apparent power, etc., can solve the problems of poor accuracy, low efficiency, power consumption of the distribution transformer terminal and the need for repeated wiring, etc., to reduce the number of wiring , The effect of reducing power consumption measurement error

Pending Publication Date: 2020-09-11
STATE GRID CORP OF CHINA +2
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] The purpose of the present invention is to provide a distribution transformer terminal power consumption measurement circuit and a distribution transformer terminal to solve the problems of repeated wiring, poor precision and low efficiency in the power consumption detection process of the distribution transformer terminal

Method used

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  • Distribution transformer terminal power consumption measuring circuit and distribution transformer terminal
  • Distribution transformer terminal power consumption measuring circuit and distribution transformer terminal
  • Distribution transformer terminal power consumption measuring circuit and distribution transformer terminal

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Experimental program
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Effect test

Embodiment 1

[0048] This embodiment provides a distribution transformer terminal power consumption measurement circuit, including a voltage power consumption measurement circuit. The voltage power consumption in this embodiment is the active power of the three phases of the distribution transformer terminal. The voltage and power consumption measurement circuit mainly includes a first metering chip, a current transformer for measuring the current of each phase, and a voltage transformer for measuring the voltage of each phase. Specifically, such as figure 1 As shown, it includes a first metering chip 1U3, and current transformers CT-A, CT-B, and CT-C respectively connected to corresponding phase lines of A, B, and C phases.

[0049] Taking the voltage and current detection of the phase line of the voltage A phase, and the calculation of the voltage power consumption as an example, the primary side of the current transformer CT-A samples the A phase connected to the three-phase voltage of t...

Embodiment 2

[0055] In this embodiment, a power consumption measurement circuit for measuring the current power consumption of the distribution transformer terminal, that is, the apparent power, is given, such as Figure 4 As shown, in this embodiment, the current power consumption measurement circuit includes a second voltage divider circuit and a second metering chip 2U3, the second voltage divider circuit samples the corresponding phase line connected to the three-phase current of the distribution transformer terminal, and the second The voltage divider circuit is also connected to the second metering chip 2U3; the second metering core calculates the current power consumption of each phase according to the collected voltage of each phase of the three-phase current of the distribution transformer terminal combined with the applied current; the second voltage divider circuit is connected to the second metering IAP pin, IAN pin, or IBP pin, IBN pin, or ICP pin, ICN pin of the chip. Figure...

Embodiment 3

[0061] The above-mentioned embodiment 1 of the power consumption measurement circuit of the distribution transformer terminal measures the active power of each phase of the distribution transformer terminal, while the embodiment 2 of the power consumption measurement circuit of the distribution transformer terminal measures the apparent power of each phase.

[0062] The difference between this embodiment and the above-mentioned embodiment 1 of the distribution transformer terminal power consumption measurement circuit and the embodiment 2 of the distribution transformer terminal power consumption measurement circuit is that in this embodiment, both the distribution transformer terminal power consumption measurement circuit embodiment 1 and the distribution transformer terminal power consumption measurement circuit are used. The circuit in Embodiment 2 of the terminal power consumption measurement circuit detects active power and apparent power.

[0063] Therefore, this embodime...

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Abstract

The invention relates to a distribution transformer terminal power consumption measuring circuit and a distribution transformer terminal, and belongs to the technical field of distribution transformerterminal intellectualization. The circuit comprises a voltage power consumption measuring circuit and/or a current power consumption measuring circuit. The voltage power consumption measuring circuitcomprises a first metering chip, a current transformer used for measuring each phase of current, and a voltage transformer used for measuring each phase of voltage. The first metering chip is used for calculating the voltage power consumption of each phase according to the acquired voltage and current of each phase of the three-phase voltage of the distribution transformer terminal. The current power consumption measuring circuit comprises a second voltage division circuit and a second metering chip, and the second metering chip is used for calculating the current power consumption of each phase according to the acquired voltage of each phase of the three-phase current of the distribution transformer terminal in combination with the applied current, so that the problems of repeated wiring, poor precision and low efficiency in the power consumption detection process of the distribution transformer terminal are solved.

Description

technical field [0001] The invention relates to a distribution transformer terminal power consumption measurement circuit and a distribution transformer terminal, and belongs to the technical field of intelligent distribution transformer terminals. Background technique [0002] The intelligent distribution transformer terminal (TTU) is mainly used in the intelligent low-voltage distribution box of the rural network. The terminal adopts the GPRS / CDMA data communication method, uses the public GSM mobile communication network as the carrier, and assists with on-site RS485 bus, infrared and other communication methods. The main control and management objects are the circuit breaker in the distribution box of the rural power grid, the residual current leakage action circuit breaker, the switching state of reactive power compensation, the working condition of the distribution transformer, and the metering electric energy meter, and monitor the relevant power consumption informatio...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01R22/10G01R22/06G01R21/133G01R21/00
CPCG01R21/002G01R21/005G01R21/1331G01R22/063G01R22/10
Inventor 胡龙源陈延辉张军民胡可王涛王静丽景伟张森林马清凤严鸿鹏马晨晨
Owner STATE GRID CORP OF CHINA
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