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Single-phase relay calibrator and test method with low cycle and low voltage load shedding protection function

A low-voltage load shedding and single-phase power generation technology, applied in the field of calibration devices, can solve the problems of low-cycle load shedding protection and low-voltage load shedding protection without calibration, and achieve the reduction of hardware volume and weight, clear design, and manual operation. The effect of entering data is simple

Active Publication Date: 2015-08-19
SHANGHAI MUNICIPAL ELECTRIC POWER CO +1
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] In order to solve the problem that the single-phase calibrator in the prior art does not have the function of calibrating low-cycle load shedding protection and low-voltage load shedding protection, the present invention provides a single-phase calibrator with low-cycle and low-voltage load shedding protection functions. The electric calibrator, by redesigning the structural scheme, can not only meet the calibration work of the relay protection device with a voltage level of 35kV and below, but also reduce the burden on the field staff to equip the calibrator. The specific scheme of the present invention is as follows :

Method used

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  • Single-phase relay calibrator and test method with low cycle and low voltage load shedding protection function
  • Single-phase relay calibrator and test method with low cycle and low voltage load shedding protection function
  • Single-phase relay calibrator and test method with low cycle and low voltage load shedding protection function

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Embodiment

[0060] Such as figure 1 As shown, a single-phase relay calibrator with low-cycle and low-voltage load shedding protection functions includes an AVR microcontroller 1 with input, output and display equipment. The AVR microcontroller is connected to the digital signal processing device DSP2 through the PC104 bus ;

[0061] The digital signal processing device DSP2 is signally connected to the DA chip 3, and cooperates to send out DA signals with variable phase, frequency, and amplitude. The DA chip is then connected to the voltage power amplifier circuit 4 and the current power amplifier circuit 5 respectively;

[0062] The voltage power amplifier circuit 4 receives the signal of the DA chip 3, amplifies the DA signal to 125V, 0.6A analog quantity, sends out and provides the sampling signal output by the power amplifier;

[0063] The current power amplifier circuit 5 receives the signal from the DA chip 3, converts and amplifies the DA signal to an analog quantity of 20A, sends it out ...

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Abstract

Provided is a single-phase relay calibrator with low-circle low-voltage lightening protection functions and test method. On the premise of meeting requirements of a power amplifier, the size and the weight of hardware are reduced, and the weight of the single-phase relay calibrator with low-circle low-voltage lightening protection functions is reduced to 16.5 kilograms (kG). The single-phase relay calibrator with low-circle low-voltage lightening protection functions and test method has the advantages of being small in size, convenient to transport, clear in process design, capable of enabling software process to be conveniently understand, simple in man-machine operation interface, simple in manually inputting data and capable of enabling field staff to simply and conveniently operate.

Description

Technical field [0001] The invention relates to a calibration device for power testing operations, in particular to a single-phase relay calibrator with low-voltage and circumferential pressure load reduction protection functions. Background technique [0002] At present, the relay protection calibrator is often used in power testing operations. Among them, the three-phase microcomputer relay protection calibrator has more functions. It is generally used for the verification of 220kV and above microcomputer type relay protection devices. In the actual application process, we found that many functions of the three-phase calibrator do not need to be used in the calibration work of the 35kV line relay protection device, and the three-phase calibrator is large and heavy, so the three-phase calibrator does not It is suitable for the verification work of the microcomputer relay protection device of 35kV and below voltage level with less labor. [0003] In summary, the current calibratio...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G01R31/327
Inventor 竺清涛戴缘生李文冯敏柏强
Owner SHANGHAI MUNICIPAL ELECTRIC POWER CO
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