Intelligent and commutation type three-phase current imbalance automatic adjusting device

A three-phase current, automatic adjustment technology, applied in the direction of reducing asymmetry of multi-phase network, eliminating/reducing asymmetry of multi-phase network, etc., can solve the problem of long switching time, strong randomness of power consumption, and simultaneous rate Low-level problems, to achieve the effect of improving operational reliability, reducing the workload of operation and maintenance, and prolonging the service life
CN109347126APending Publication Date: 2019-02-15SHANDONG ELECTRICAL ENG & EQUIP GRP XINNENG TECH CO LTD
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Patent Information

Authority / Receiving Office
CN · China
Current Assignee / Owner
SHANDONG ELECTRICAL ENG & EQUIP GRP XINNENG TECH CO LTD
Publication Date
2019-02-15

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Abstract

The invention relates to an intelligent and commutation type three-phase current imbalance automatic adjusting device. The device comprises a main controller, a phase converter, a first current transformer and an anti-power-off electrical appliance element combination; the main controller is a control terminal and is electrically connected with an outgoing line side bus of a distribution transformer; and the phase converter is an execution terminal and is electrically connected with a user line and a user load of a three-phase branch through the anti-power-off electric appliance element combination. Relay current zero-crossing cutting and voltage zero-crossing input technologies are adopted, so that it is guaranteed that no arc exists at the moment of cutting and no inrush current exists at the moment of input, the service life of a relay is prolonged, and the operation reliability of the relay is improved; and a magnetic latching relay with a switching state feedback signal output endis adopted, so that the problem of interphase short circuit caused by improper execution of a switching action of the magnetic latching relay is avoided.
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Description

technical field

[0001] The invention relates to the field of three-phase current unbalance control in a distribution network, in particular to an intelligent, phase-commutating automatic adjustment device for three-phase current unbalance. Background technique

[0002] The low-voltage distribution network is an important part of the final power supply network, which directly provides electricity to various users. The low-voltage distribution network usually adopts a three-phase four-wire power supply mode, and the phenomena of single-phase power consumption and three-phase power consumption coexist. The characteristics of single-phase electricity consumption are complex, such as large gaps in user electricity habits, strong randomness in electricity consumption, low simultaneous rate of electricity consumption, and large dispersion in time and space distribution. The above characteristics of single-phase power consumption cause the unbalanced phenomenon of three-phase curre...

Claims

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