Zero-millisecond three-phase unbalanced control commutation switch and commutation timing control method thereof

A phase commutation switch and balancing technology, applied in the direction of reducing the asymmetry of the multi-phase network, eliminating/reducing the asymmetry of the multi-phase network, etc., can solve the problems of inrush current, dysfunction, flicker, etc., and solve the problem of three-phase unbalance , the effect of a reliable commutation process

Pending Publication Date: 2019-07-12
ELECTRIC POWER RESEARCH INSTITUTE, CHINA SOUTHERN POWER GRID CO LTD +1
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

Several adverse effects brought by the commutation time are electrical equipment sensitive to power supply, which will shut down, shut down, flicker, and malfunction, etc.
Seriously, it will lead to burnout of electrical appliances, and secondly, when it is re-introduced into a light-load phase, an inrush current will be generated, which will have an adverse effect on the power supply network and power supply equipment

Method used

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  • Zero-millisecond three-phase unbalanced control commutation switch and commutation timing control method thereof
  • Zero-millisecond three-phase unbalanced control commutation switch and commutation timing control method thereof
  • Zero-millisecond three-phase unbalanced control commutation switch and commutation timing control method thereof

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Embodiment Construction

[0036]In describing the present invention, it should be understood that the terms "center", "longitudinal", "transverse", "upper", "lower", "front", "rear", "left", "right", " The orientations or positional relationships indicated by "vertical", "horizontal", "top", "bottom", "inner" and "outer" are based on the orientations or positional relationships shown in the drawings, and are only for the convenience of describing the present invention and Simplified descriptions, rather than indicating or implying that the device or element referred to must have a particular orientation, be constructed and operate in a particular orientation, and thus should not be construed as limiting the invention. In addition, the terms "first", "second", etc. are used for descriptive purposes only, and should not be understood as indicating or implying relative importance or implicitly specifying the quantity of the indicated technical features. Thus, a feature defined as "first", "second", etc. m...

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Abstract

The invention discloses a zero-millisecond three-phase unbalanced control commutation switch and a commutation timing control method thereof. The switch comprises an upper circuit board, three thyristors, three magnetic holding relays and a lower circuit board. The thyristors and the magnetic holding relays are inserted into the lower circuit board through pins, the three thyristors comprise a A-phase thyristor, a B-phase thyristor and a C-phase thyristor, the three magnetic holding relays comprise an A-phase magnetic holding relay, a B-phase magnetic holding relay and a C-phase magnetic holding relay, the lower circuit board is further provided with a commutation unit circuit for commutation, and the upper circuit board is provided with a digital tube. The invention has the advantages that the load power supply is not interrupted when a load is switched from a current connection phase to a light carrier phase through the cooperation of a power electronic device and the magnetic holding relays. The three-phase unbalance problem of a power distribution network is solved, and the power consumption of a user is not adversely affected.

Description

technical field [0001] The invention relates to the field of distribution network auxiliary equipment, in particular to a zero millisecond three-phase unbalance control phase commutation switch and a phase commutation sequence control method thereof. Background technique [0002] my country's low-voltage transformers and power supply lines adopt a three-phase four-wire power supply system. Most of the power users in the low-voltage power supply area are single-phase power users. The number of single-phase users is unevenly distributed on the three phases and the power consumption is not periodic As a result, the three-phase load is unbalanced, and the instantaneous current of the three phases varies greatly. As a result, many hazards have been brought to the power supply transformer and power supply lines. For example, the unbalanced three-phase current causes the magnetic flux in the iron core of the power supply transformer to not be completely offset. Cause fire; the curr...

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 栾浩东匡晓云林伟斌
Owner ELECTRIC POWER RESEARCH INSTITUTE, CHINA SOUTHERN POWER GRID CO LTD
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