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Method and device for controlling switching to standby transformer

A backup transformer and backup voltage technology, applied in AC network circuits, electrical components, circuit devices, etc., can solve problems such as energy waste, power consumption, no-load loss, etc.

Inactive Publication Date: 2017-01-04
CHINA SHENHUA ENERGY CO LTD +2
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] However, the problem with the existing technology is that the standby transformer is in the no-load operation state for a long time, and there is no-load loss, which will consume a certain amount of electric energy, resulting in energy waste

Method used

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  • Method and device for controlling switching to standby transformer
  • Method and device for controlling switching to standby transformer
  • Method and device for controlling switching to standby transformer

Examples

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Embodiment Construction

[0026] Specific embodiments of the present invention will be described in detail below in conjunction with the accompanying drawings. It should be understood that the specific embodiments described here are only used to illustrate and explain the present invention, and are not intended to limit the present invention.

[0027] figure 1 is a flowchart of a method for controlling standby transformer switching according to an embodiment of the present invention. Method among the present invention can be used for the control device of factory power supply, as figure 1 As shown, the present invention may include the following steps.

[0028] In step S110, it is judged whether to start switching to the backup transformer according to the relevant parameters of the bus voltage and the backup voltage.

[0029] In an embodiment, the judging whether to switch to the backup transformer according to the relevant parameters of the bus voltage and the backup voltage may include: judging w...

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Abstract

The invention relates to the field of electric power supply and discloses a method and device for controlling switching to a standby transformer. The method comprises the following steps: according to correlation parameters of bus voltages and standby voltages, determining whether to start switching to the standby transformer; when it is determined that the switching to the standby transformer is started, transmitting a closing instruction to a surge suppressor and a circuit breaker; after the closing instruction is received through the surge suppressor, monitoring the bus voltages so as to output closing signals to the circuit breaker at the transmission moment when surges during closing are enabled to be smallest; and receiving the closing instruction and the closing signals through the circuit breaker, and according to the closing instruction and the closing signals, performing closing so as to realize the switching to the standby transformer. According to the invention, loss caused by no load of the standby transformer can be avoided, and energy can be saved; and impact on the standby transformer due to simultaneous superposition of transformer excitation surges and motor self-startup load currents can be reduced.

Description

technical field [0001] The present invention relates to the field of electric power supply, in particular to a method and equipment for controlling switching of standby transformers. Background technique [0002] When supplying power to a factory, it is required to ensure a stable power supply, and it is necessary to provide a technology that can switch to a backup power supply when the power supply of the factory fails. In the prior art, a hot standby mode is adopted to realize switching. When the power supply unit fails, switch the used power supply to the backup transformer for power supply. In the hot standby mode, the high-voltage switch of the standby transformer is in the closed state, the switches on the low-voltage side are opened for standby, and the standby transformer is normally running without load. This mode of operation can more reliably and quickly switch the plant power to the backup power supply in the event of an accident. Because the switching time is ...

Claims

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Application Information

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IPC IPC(8): H02J3/00
CPCH02J3/0073
Inventor 张典雄卓钢刘世雄
Owner CHINA SHENHUA ENERGY CO LTD
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