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Identification and judgment method, automatic switching method and automatic switching device for power supply attributes of power supply line

A technology for automatic switching of power supply lines and backup power supplies, which is applied in circuit installations, power supply testing, emergency power supply arrangements, etc., which can solve the problems of increased labor costs, high probability of errors, and misoperation of backup automatic switching devices to ensure safety and stability. Reliable operation, reducing human factors for errors, and improving the reliability of power supply

Active Publication Date: 2022-05-13
QUJING POWER SUPPLY BUREAU YUNNAN POWER GRID CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0010] (4) When a line is filled with "0", the line does not work
[0012] (6) This table is not applicable to the self-switching mode of the bus-tie standby, which does not need to be adjusted, and is determined by the device itself
Therefore, no matter how many incoming lines there are, the combination methods will increase in series. There are many combination methods, and the corresponding logic is also very complicated. The workload of setting calculation, installation and commissioning, operation and maintenance, and labor costs increase several times; It is necessary to arrange at least two operating staff to go to the site to arrange the operation of pressing plate throwing and withdrawing according to the method. Due to human operation and human participation during the pressing plate throwing and withdrawing operation, the probability of error is high, which will cause missetting, misoperation, missed inspection, Misdetection and other problems lead to misoperation or refusal of the standby automatic switching device, resulting in immeasurable losses and huge safety risks

Method used

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  • Identification and judgment method, automatic switching method and automatic switching device for power supply attributes of power supply line
  • Identification and judgment method, automatic switching method and automatic switching device for power supply attributes of power supply line
  • Identification and judgment method, automatic switching method and automatic switching device for power supply attributes of power supply line

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Experimental program
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Effect test

Embodiment 1

[0062] This embodiment provides a method for identifying and judging the power supply attribute of a power supply line. The method realizes the power supply attribute of the power supply line by detecting the pressure cut voltage and the line voltage on the power supply line, and cooperating with the circuit breaker on the power supply line. Direct judgment, thus realizing the simplification of the control logic and calculation amount of the standby automatic switching device, which can clear and simplify the control logic of the standby automatic switching device, reduce the calculation amount, and automatically judge and perform logical actions by itself, with a high degree of autonomy and intelligent.

[0063] Such as figure 2 As shown, the identification and judgment method of the power supply attribute of the power supply line includes: (1) collecting the voltage of the power supply line; (2) collecting the line voltage of the power supply line; (4) Judge the power supp...

Embodiment 2

[0068] On the basis of the method provided in Embodiment 1, this embodiment provides a method for automatic switching on of a backup power supply, which includes a charging method, a discharging method and an action process of the standby automatic switching device, as follows:

[0069] (1) The charging method of the self-injection device: check whether the pressure and cut voltage of the power supply line is uniform in three phases; check whether the line voltage of the power supply line is under pressure; According to the operation mode of the system, if the above corresponding charging conditions are met, the charging will be completed after the charging time of the equipment and self-injection. Wherein, the system operation mode refers to the operation mode of the main and standby power supply lines of the system.

[0070] (2) The discharge method of the self-switching device: detect whether the line voltage of the power supply line is under pressure; detect whether the vo...

Embodiment 3

[0100] Such as Figure 8 As shown, the present embodiment provides a self-transfer device that implements the method for judging the power supply attribute of the power supply line provided in Embodiment 1 and 2 and the self-transfer method of the backup power supply. The power supply line cuts voltage and line voltage, and converts them into electrical quantity status signals; the switch quantity acquisition module is used for the signal acquisition of circuit breakers and bus tie switches on the power supply line; the output quantity output module is used for Responsible for receiving the electrical control commands sent by the logic board module, complete the electrical control of the circuit breaker on the power supply line and the circuit breaker on the busbar, and realize power supply switching; the logic board module is responsible for receiving the electrical quantity status transformed by the voltage quantity acquisition module The signal and switch value acquisition ...

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Abstract

The invention belongs to the technical field of power grid equipment and control of the power grid equipment, and provides an identification and judgment method for power supply attributes of a power supply line, an automatic switching method and an automatic switching device. And the control logic and the operand of the spare power automatic switching device are simplified in cooperation with on-off position detection of a circuit breaker on a power supply line. Through the identification and judgment method for the power supply attributes of the power supply line, the control logic of spare power automatic switching can be clear and simplified, the operand is reduced, automatic judgment and automatic logic action are performed according to the actual operation condition, high autonomy and intelligence are achieved, self-adaption is truly achieved, manual intervention is greatly reduced, and the working efficiency is improved. Human factors of errors are reduced, the reliability of power supply is greatly improved, and safe, stable and reliable operation of a power grid is ensured.

Description

technical field [0001] The invention belongs to the technical field of power grid equipment and its control, and in particular relates to a method for identifying and judging the attributes of a power supply line, an automatic switching method and an automatic switching device. Background technique [0002] The stable and reliable operation of the power grid is closely related to the local economic and social development. If the substation fails, the power supply of industrial and mining enterprises will be interrupted, and the direct economic loss will be in the billions of yuan; the suspension of high-speed railways and trains will cause adverse social impacts; Seriously affect the order of life and so on. [0003] When the 500kV power supply ring network and the 220kV power supply ring network form an electromagnetic ring network, the risk of safe and stable operation of the power grid is extremely high. In order to suppress the short-circuit current, an open-loop operati...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H02J9/06G01R31/40
CPCH02J9/06H02J9/068G01R31/40Y04S20/20Y02B70/30
Inventor 朱晓红李建斌常永要单源蔡澔伦杨伟荣周永其赵明辉曾俊涛邵代峰庄明万
Owner QUJING POWER SUPPLY BUREAU YUNNAN POWER GRID CO LTD