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

A detection method and relay technology, which is applied in the field of electric power maintenance, can solve the problems of low reliability, complex logic, cumbersome relay detection steps, etc., and achieve the effect of small sampling voltage error and stable potential

Active Publication Date: 2021-09-24
浙江日风电气股份有限公司
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  • 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

Method used

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  • Three-phase relay detection method, device, equipment and computer-readable storage medium
  • Three-phase relay detection method, device, equipment and computer-readable storage medium
  • Three-phase relay detection method, device, 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: Collect the second phase voltage of the inverter, the third phase voltage of the inverter, the second phase voltage of the powe...

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] The shutdown pressure collection unit is used to collect the first phase voltage of the shutdown inverter 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 inverter 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...

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Abstract

The invention discloses a three-phase relay detection method. By sending an inverter start signal; when the inverter slows down for the first preset time, a single-phase close signal is sent; the second phase voltage of the relay and the third phase voltage of the relay are respectively collected. phase voltage, the second phase voltage of the grid, and the third phase voltage of the grid; when the inverter is synchronized with the grid, send a full-phase closing signal; send the inverter wave sealing signal; collect the inverter wave sealing signal The voltages of the three phases of the inverter relative to the midpoint of the grid side and the voltages of the three phases of the grid respectively relative to the midpoint of the grid side; according to the voltages of the three phases of the inverter relative to the midpoint of the grid side The voltage and the voltages of the three phases of the power grid relative to the midpoint of the power grid determine the relay detection result. The invention simplifies the detection steps, reduces the detection cost and improves the operation safety. The present invention also provides a three-phase relay detection device, equipment and computer-readable storage medium with the above-mentioned advantages.

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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Patent Type & Authority Patents(China)
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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