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Three-phase relay detection method, device and equipment and computer readable storage medium

A detection method and relay technology, applied in the field of equipment and computer readable storage media, three-phase relay detection method, device, can solve the problems of low reliability, complex logic, cumbersome relay detection steps, etc., and achieve stable potential and sampling The effect of small voltage error

Active Publication Date: 2021-08-13
浙江日风电气股份有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] The object of the present invention is to provide a three-phase relay detection method, device, equipment and computer-readable storage medium to solve the problems of cumbersome relay detection steps, complex logic and low reliability in the prior art

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  • Three-phase relay detection method, device and equipment and computer readable storage medium
  • Three-phase relay detection method, device and equipment and computer readable storage medium
  • Three-phase relay detection method, device and equipment and computer readable storage medium

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specific Embodiment approach

[0056] The core of the present invention is to provide a three-phase relay detection method, a schematic flow chart of a specific implementation is as follows figure 2 As shown, it is called the first specific implementation mode, including:

[0057] S101: Sending an inverter start signal.

[0058] After receiving the inverter starting signal, the corresponding inverter starts to slow down.

[0059] S102: After the inverter slows down for a first preset time, send a single-phase close signal to close the first corresponding relay.

[0060] The first preset time can be set according to the actual situation, as long as the abc three-phase voltage on the inverter side is close to the ABC three-phase of the power grid after the slow start of the first preset time .

[0061] The first phase can be any one of phase a, phase b or phase c.

[0062] S103: respectively collect the second phase voltage of the relay, the third phase voltage of the relay, the second phase voltage of t...

Embodiment approach

[0121] As a preferred implementation manner, the wave sealing module 600 includes:

[0122] The timing wave blocking unit is configured to send the inverter wave blocking signal after the first interval of sending the all-phase closing signal.

[0123] As a preferred implementation manner, the sending module 100 further includes:

[0124] a shutdown closing unit, configured to send a shutdown single-phase closing signal to close the first corresponding relay;

[0125] Shutdown pressure collection unit, used to collect the first phase voltage of the shutdown relay and the first phase voltage of the shutdown grid;

[0126] The shutdown detection unit is configured to determine the shutdown detection result of the first corresponding relay through the first phase voltage of the shutdown relay and the first phase voltage of the shutdown grid.

[0127] As a preferred embodiment, the shutdown closing unit further includes:

[0128] The independent open circuit unit is used to ind...

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Abstract

The invention discloses a three-phase relay detection method. The method comprises the following steps: sending an inverter starting signal; when the inverter slowly starts for a first preset time, sending a single-phase closing signal; respectively acquiring a relay second phase voltage, a relay third phase voltage, a power grid second phase voltage and a power grid third phase voltage; after the inverter and the power grid are synchronized, sending a full-phase closing signal; sending an inverter wave sealing signal; collecting voltages of three phases of the inverter relative to the power grid side midpoint and voltages of three phases of the power grid relative to the power grid side midpoint after the inverter is subjected to wave sealing; and determining a relay detection result according to the voltages of the three phases of the inverter relative to the power grid side midpoint and the voltages of the three phases of the power grid relative to the power grid side midpoint. According to the invention, the detection steps are simplified, the detection cost is reduced, and the operation safety is improved. The invention also provides a three-phase relay detection device and equipment with the above advantages, and a computer readable storage medium.

Description

technical field [0001] The invention relates to the field of electric power maintenance, in particular to a three-phase relay detection method, device, equipment and computer-readable storage medium. Background technique [0002] With the development of science and technology, the transmission grid for various power functions is becoming more and more complex. In order to ensure the stability of the grid power supply, it is essential to regularly check the working status of the relays in the three-phase power network. [0003] In the prior art, in order to check whether the relay is working normally, the voltage on the grid side and the voltage on the inverter side that need to be collected are the voltages of multiple points for the potential midpoint of each side. In addition, because the midpoint of the grid side The potential of the midpoint on the inverter side may not be the same as that of the inverter side, so additional calculation steps are required for correction ...

Claims

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Application Information

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IPC IPC(8): G01R31/327
CPCG01R31/327
Inventor 杨一陈建明吴龙生胡勇涛卢钢
Owner 浙江日风电气股份有限公司
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