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Phase change switch-type three-phase imbalance management device

A commutation switch, three-phase technology, applied in the direction of reducing the asymmetry of the polyphase network, eliminating/reducing the asymmetry of the polyphase network, etc., which can solve the problems such as the inability to guarantee the smooth transition of the voltage and the voltage shock.

Inactive Publication Date: 2018-10-23
南京拓纳电气有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Due to the angle difference between phases, the voltage amplitudes of the current phase and the backup phase are different when the current is zero-crossing and commutating, resulting in a voltage impact on the load after commutation, and a smooth transition of the voltage cannot be guaranteed.

Method used

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  • Phase change switch-type three-phase imbalance management device
  • Phase change switch-type three-phase imbalance management device

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Experimental program
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Embodiment 2

[0019] Embodiment 2: On the basis of Embodiment 1, the models of thyristor SCR3 and thyristor SCR4 of the present application are both BCA60-1600, which have low cost, stable performance, long service life and superior high-voltage resistance.

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PUM

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Abstract

The invention discloses a phase change switch-type three-phase imbalance management device, which comprises a control system, an A phase power supply line, a B phase power supply line and a C phase power supply line, wherein the control system is connected with the A phase power supply line, the B phase power supply line and the C phase power supply line. The phase change switch-type three-phase imbalance management device adopts equal amplitude phase change to realize a phase change function. When the amplitude of the current phase voltage and the amplitude of standby phase voltage are the same, a phase change process is started, and after load voltage is larger than a phase voltage threshold value, quick switching to the standby phase is carried out. After the equal amplitude phase change technology is adopted, the voltage amplitude before phase change and the voltage amplitude after phase change are equal, and smooth transition of the load voltage is ensured. The safety of a load electric appliance is ensured and the load electric appliance is ensured not to be damaged.

Description

technical field [0001] The invention relates to the technical field of distribution network automation, in particular to a phase-commutation switch type three-phase unbalance control device. Background technique [0002] The traditional three-phase unbalance control device of commutation switch uses zero-crossing current commutation when using thyristor commutation. When the current phase current is overcurrent and the load voltage is greater than the commutation threshold, it quickly switches to the standby phase. Due to the angle difference between phases, the voltage amplitudes of the current phase and the standby phase are different when the current is zero-crossing and commutating, resulting in voltage shocks on the load after commutation, and the smooth transition of the voltage cannot be guaranteed. Contents of the invention [0003] The purpose of the present invention is to provide a commutation switch type three-phase unbalance control device to solve the problem...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H02J3/26
CPCH02J3/26Y02E40/50
Inventor 郑有余张志勇
Owner 南京拓纳电气有限公司