Multifunctional ammeter having reactive compensation and relay protection functions

A relay protection and multi-functional technology, applied in the direction of measuring electrical variables, measuring devices, instruments, etc., can solve the problems of stability, precision, sensitivity difficult to control, single function, etc., to achieve accurate measures, accurate data sources, and improve processing The effect of data speed

Inactive Publication Date: 2016-08-17
CHINA UNIV OF GEOSCIENCES (BEIJING)
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0002] The traditional electric meter is only used as an electric energy meter, and its function is relatively sin

Method used

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  • Multifunctional ammeter having reactive compensation and relay protection functions
  • Multifunctional ammeter having reactive compensation and relay protection functions
  • Multifunctional ammeter having reactive compensation and relay protection functions

Examples

Experimental program
Comparison scheme
Effect test

Embodiment Construction

[0017] Functions of the multi-function meter:

[0018] 1. The sampling unit uses temperature sensors, humidity sensors, current detectors, voltage detectors, etc. to collect data. These components are connected with the multi-function meter through RS485 cables.

[0019] 2. The analog-to-digital conversion unit converts the collected physical data, and the conversion processor adopts a DSP TMS2407 chip.

[0020] 3. The calculation and judgment unit is divided into two steps, the first step is calculation, and the second step is judgment. Use the collected data to calculate the phase sequence, frequency, power, harmonics, reactive power compensation and relay protection, and then judge whether these quantities are normal.

[0021] The basic principle of the reactive power compensation function is that when cosΦ is ahead and >0.98, and lags >0.95, within this range, the controller does not send out a control signal at this time, and the capacitor banks that have been put in wi...

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PUM

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Abstract

The invention provides a multi-functional electric meter with reactive power compensation and relay protection functions. Its functions include measuring and monitoring indoor temperature and humidity, three-phase voltage, current, phase sequence, frequency, power, harmonics, reactive power Compensation, relay protection. The main components of the multi-function electric meter are: 1. Sampling unit, 2. Analog-to-digital conversion unit, 3. Calculation and judgment unit, 4. Display unit, 5. Command execution unit, 6. Data storage unit. The sampling unit includes temperature sensors, humidity sensors, current detectors, voltage detectors, etc.; the analog-to-digital conversion unit converts the collected physical quantities into digital quantities; the calculation and judgment unit includes a calculation part and a judgment part, and these two parts are processed by two The computer calculates and judges the digital data, and this design can shorten the time from data acquisition, processing to display. The display unit is not only displayed on the LED screen of the multi-function meter, but also displayed on the main control machine of the monitoring system; the command execution unit includes automatic regulation and manual regulation.

Description

technical field [0001] The invention belongs to electric power monitoring and regulating equipment, which monitors, collects and regulates indoor temperature and humidity, three-phase voltage, current, phase sequence, frequency, power, harmonic and other data, and at the same time performs reactive power compensation, Relay protection. Background technique [0002] Traditional electric meters are only used as electric energy measuring instruments, and their functions are relatively single, and their stability, accuracy, and sensitivity are difficult to control, and they need to be calibrated regularly. In addition to the measurement function of the basic electricity consumption of the traditional meter, the multifunctional meter designed in this design also has the functions of measuring temperature, humidity, voltage, current, active power, reactive power, power factor and power grid of each phase of A, B, and C. frequency etc. Its basic functions include two-way multi-ta...

Claims

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Application Information

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IPC IPC(8): G01R22/06G01D21/02
CPCG01R22/06G01D21/02
Inventor 徐惠勇井文丽钮鑫温凯瑞董娜
Owner CHINA UNIV OF GEOSCIENCES (BEIJING)
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