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Method and system for switching backup power supply

A backup power supply and switching system technology, applied in the field of electric power, can solve the problem that the backup power supply cannot be switched in time, and achieve the effect of quickly putting in the backup power supply, accurately switching and putting it into use

Active Publication Date: 2010-12-15
深圳市国立智能电力科技有限公司
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

When the bus is powered off, the self-contained generator has an independent excitation circuit and power system, which have a strong supporting effect on the power and voltage consumption in the load area, so that the existing backup power cannot be switched in time. put into production

Method used

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  • Method and system for switching backup power supply
  • Method and system for switching backup power supply
  • Method and system for switching backup power supply

Examples

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Embodiment Construction

[0041] In order to solve the problem that the standby power supply cannot be switched in time, a fast switching method of the standby power supply is provided in accordance with the input conditions of the standby power supply and the quick start of the standby power supply.

[0042] For electric loads, the standby power supply should be put into operation before the speed and bus voltage drop sharply, that is, when the amplitude and frequency of the power-off bus residual voltage (the feedback voltage synthesized by many motors, commonly known as the residual voltage) are still high, by seeking When to put in the backup power supply, put in the backup power supply. Since the motor speed and output torque of the electric load are still relatively high, the impact of the backup power supply at the moment of input is not large, and the electromechanical transition time after the input is short (hundreds of milliseconds), so that all or most of the electric load can be operated wi...

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Abstract

The invention relates to a method and a system for switching a backup power supply. The method comprises the following steps of: starting switching and tripping off a working power switch; acquiring the operation condition of the backup power supply; and if a condition is accordant with the tripping off criterion of the working power switch and the operation condition of the backup power supply, performing a power supply switching action and putting the backup power supply into operation, wherein the execution of the starting switching and the stripping off of the working power switch comprises one or more of the following criteria: frequency voltage quality starting, frequency difference starting, frequency difference non-current starting, reverse power starting and frequency difference reverse power starting. At least one of five criteria is adopted, so that the power supply can be switched rapidly and correctly. Moreover, a multi-judgment backup power supply operation condition is adopted, so that the backup power supply can be put into operation correctly and the backup power supply is switched rapidly and correctly and put into operation.

Description

【Technical field】 [0001] The invention relates to the field of electric power, in particular to a backup power switching method and system. 【Background technique】 [0002] In petrochemical, metallurgical and other continuous production enterprises, the production technology and process put forward high requirements on the reliability and continuity of power supply. The interruption of power supply and large fluctuations in voltage will bring huge losses to the enterprise. [0003] Such as figure 1 , according to the n-1 criterion of the traditional power system, in order to improve the reliability of power supply, the power supply system of the above-mentioned factories and mines adopts no less than two power supply designs. The double incoming lines supply power to the busbar at the same time, the bus tie switch ML is disconnected, and the I busbar and II busbar are mutually backup power supplies. The two incoming lines come from different substations of the same power gr...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H02J9/06H02J13/00
CPCY04S20/248Y02B90/222Y02B70/3291Y04S20/12Y02B70/30Y02B90/20
Inventor 梁俊滔陈曙玲
Owner 深圳市国立智能电力科技有限公司
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