Device and method for zero-crossing split-phase switching control after first cycle wave of double power supply voltage difference

A voltage difference, dual power supply technology, applied in the direction of circuit devices, emergency power supply arrangements, electrical components, etc., can solve the problems of low electrical life, mechanical life, limited use range, arcing contacts, etc., to achieve long service life and reduce production Cost, effect of suppressing circulation

Pending Publication Date: 2015-12-30
STATE GRID CORP OF CHINA +2
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  • Abstract
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  • Application Information

AI Technical Summary

Problems solved by technology

When the traditional mechanical switch is turned on or off, contact vibration and arcing will occur, resulting in contact corrosion, electromagne

Method used

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  • Device and method for zero-crossing split-phase switching control after first cycle wave of double power supply voltage difference
  • Device and method for zero-crossing split-phase switching control after first cycle wave of double power supply voltage difference
  • Device and method for zero-crossing split-phase switching control after first cycle wave of double power supply voltage difference

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[0034] The technical solutions of the present invention will be further described in detail below through the accompanying drawings and embodiments.

[0035] Such as figure 1 As shown, the main structure of the dual power supply rapid switching control device of the present invention includes a controller and a permanent magnet switch. The controller is used to control the permanent magnet switch CB when one bus bar loses power. 33 Connect the first bus bar and the second bus bar so that the other bus bar supplies power to the load carried by the power-loss bus bar. The permanent magnet switch is connected to the controller, which is used to realize the rapid switching of the zero-phase division after the first cycle of the voltage difference according to the instructions of the controller. . Specifically, the first bus bar B1 connected to the first load M1 and the second bus bar B2 connected to the second load M2 are connected by the permanent magnet switch CB 33 Connection, whi...

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Abstract

The invention relates to a device and a method for zero-crossing split-phase switching control after a first cycle wave of double power supply voltage difference. The device for zero-crossing split-phase switching after the first cycle wave of the double power supply voltage difference comprises a controller and a permanent magnet switch, wherein the controller controls a bus-tie circuit breaker to be connected to a first bus and a second bus, one end of the permanent magnet switch is connected with the first bus, the other end of the permanent magnet switch is connected with the second bus, and a control end of the permanent magnet switch is connected with the controller. When a working power supply is powered off because of a fault, the permanent magnet switch is adopted to control emission of a closing instruction at first zero crossing of double bus split-phase voltage difference, and a standby power supply is inputted just at a zero-crossing moment after the first cycle wave of the voltage difference. The device and the method provided by the invention not only previous complicated calculation for a quick switching criterion and a first synchronization criterion, but also enable whether an action criterion condition is satisfied or not to be not influenced by load characteristics, thereby absolutely ensuring zero-crossing phase-split quick switching after the first cycle wave of the voltage difference, and improving the switching speed of a double power supply system. In addition, an arcing phenomenon brought about in on-off of a traditional mechanical switch does not occur, generation of loop current is suppressed, and the service life of the switch is prolonged.

Description

technical field [0001] The invention relates to a power supply switching device and method, in particular to a zero-crossing phase-separation switching control device and method after the first cycle of the voltage difference between dual power supplies. Background technique [0002] Continuous and reliable power supply is the basic condition for the safe operation of electrical equipment. Therefore, occasions that require high power supply reliability are generally equipped with two power supplies, and the successful and fast switching between the two power supplies is the key to continuous and uninterrupted power supply. Due to external or internal reasons such as lightning strikes, short circuits, low-frequency oscillations, and load circuit failures, large and medium-sized industrial enterprises such as petrochemical, metallurgical, and power plants often experience abnormal power outages, large voltage fluctuations, or short-term power outages (commonly known as "shock p...

Claims

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Application Information

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IPC IPC(8): H02J9/04
Inventor 张喜林梁志珊夏鹏程邵壮张帆
Owner STATE GRID CORP OF CHINA
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