A three-phase power system

A technology of three-phase power supply and power supply, which is applied in the direction of only measuring current, measuring electrical variables, measuring current/voltage, etc., can solve the problems of unbalanced three-phase load current, etc., and achieve the effect of dynamic balance adjustment and real-time monitoring

Active Publication Date: 2020-05-01
HARBIN UNIV OF SCI & TECH
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  • Abstract
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Problems solved by technology

[0004] The purpose of the present invention is to solve the problem of unbalanced three-phase load current in the existing three-phase power supply system, and propose a three-phase power supply system

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  • A three-phase power system

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Embodiment Construction

[0012] Exemplary embodiments of the present invention will now be described in detail with reference to the accompanying drawings. It should be understood that the implementations shown and described in the drawings are only exemplary, intended to explain the principle and spirit of the present invention, rather than limit the scope of the present invention.

[0013] The embodiment of the present invention provides a three-phase power supply system, such as figure 1 As shown, it includes a three-phase programmable power supply 1, a single-phase transformer 2, a current transformer 3, a current-voltage converter 4, a data acquisition card 5 and a computer 6.

[0014] The A, B, and C three-phase output terminals of the three-phase programmable power supply 1 are respectively connected to an independent single-phase transformer 2, and the secondary side of each independent single-phase transformer 2 is directly connected to a load to form a main circuit. The voltage of each phas...

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Abstract

The invention discloses a three-phase power supply system, which comprises a three-phase programmable power supply, a single-phase transformer, a current transformer, a current-voltage converter, a data acquisition card and a computer. The three-phase programmable power supply is connected with three independent single-phase transformers, and the three-phase loads are respectively connected to form the main circuit. The current transformer, current-voltage converter, data acquisition card and computer are connected in turn to form the measurement circuit. The phase-to-phase programmable power supply is connected to form a feedback circuit. The invention can realize the real-time monitoring of the three-phase load current, and can realize the dynamic balance adjustment of the three-phase load current.

Description

technical field [0001] The invention belongs to the technical field of power supply systems, and in particular relates to the design of a three-phase power supply system. Background technique [0002] Three-phase alternating current is a form of transmission of electrical energy, referred to as three-phase power. Three-phase AC power supply is a power supply composed of three AC potentials with the same frequency, equal amplitude, and 120° phase difference. There are many uses of three-phase alternating current. Most of the AC power equipment in the industry, such as motors, use three-phase alternating current, which is the often mentioned three-phase four-wire system. In daily life, single-phase power is mostly used, also known as lighting power. When lighting electricity is used for power supply, one of the three-phase electricity is used to supply power to electrical equipment, such as household appliances, and the other wire is the fourth wire among the three-phase and...

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H02J3/26G01R19/00G01R15/18
CPCG01R15/18G01R19/0092H02J3/26Y02E40/50
Inventor 梁艳萍万银龙王晨光
Owner HARBIN UNIV OF SCI & TECH
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