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Backup power supply based on unbalanced AC/DC single/two-phase fault and its application

A backup power supply, AC and DC technology, applied in emergency power supply arrangements, electrical components, circuit devices, etc., can solve the problems of sudden changes in inductive load voltage, increase the complexity of the power grid, etc., to achieve good circuit stability, improve power supply reliability, manpower The effect of low material cost

Inactive Publication Date: 2020-07-10
CHINA UNIV OF PETROLEUM (EAST CHINA)
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0007] The technical problem to be solved in this application is to increase the reliability of power supply of the power grid, mainly for the problem that the single-phase or two-phase fault of the power system may cause a sudden change in the voltage of the inductive load or increase the complexity of the power grid. Requirements for power supply reliability, while improving power supply reliability and power to meet user needs

Method used

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  • Backup power supply based on unbalanced AC/DC single/two-phase fault and its application

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Embodiment Construction

[0022] Reference will now be made in detail to the exemplary embodiments, examples of which are illustrated in the accompanying drawings. When the following description refers to the accompanying drawings, the same numerals in different drawings refer to the same or similar elements unless otherwise indicated. The implementations described in the following exemplary embodiments do not represent all implementations consistent with this application. Rather, they are merely examples of apparatuses and methods consistent with aspects of the present application as recited in the appended claims. In this embodiment, the ordinal numerals such as "first" and "second" used before the names of each device are only used to distinguish each device, and do not indicate the order or importance of each device.

[0023] The backup power supply and working principle based on unbalanced AC-DC-AC single-phase or two-phase faults in this application will be described in detail below through specif...

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Abstract

The application provides a backup power supply based on an unbalanced AC-DC-AC single / two-phase fault, and a power supply method thereof. The backup power supply comprises a main circuit breaker group(1), a current transformer group (2), a rectification input circuit breaker group (3), an inverter output circuit breaker group (4), a rectifier group (5), an inverter group (6), a relay protection device (7) and a controller (8). The backup power supply can be used to comprehensively manage and distribute the three-phase electric energy, thereby, when a single-phase or two-phase fault occurs inthe three-phase circuit, ensuring continuous charging of the load, having good circuit stability and ensuring no impulse voltage and current generated in the circuit, so as to improve the reliabilityof power supply. Moreover, the backup power supply provided by the application is low in cost, simple in installation by being installed in the original installation cabinet in the circuit, low in human and material resource cost and low in loss.

Description

technical field [0001] The application belongs to the field of power grid equipment, in particular to a backup power supply based on unbalanced AC / DC single / two-phase faults and its application. Background technique [0002] Three-phase alternating current is a combination of three symmetrical sinusoidal alternating currents with a phase difference of 120°. It is generated by three sets of symmetrical windings of a three-phase generator. Each winding and its external circuit are called a phase, respectively marked as A, B, C, their combination is called three-phase system, often in the form of three-phase three-wire system and three-phase four-wire system, that is, delta connection and star connection. [0003] The main advantage of the three-phase system is that it saves wires in power transmission; it can generate a rotating magnetic field, and it can create conditions for the development and application of asynchronous motors with simple structure and easy use. Three-pha...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H02J9/06H02H7/26
CPCY02B70/30Y04S20/20
Inventor 程雪颖申晓阳高云凡郭文捷范浩宇孟维琦李一航朱劲男丁瑜
Owner CHINA UNIV OF PETROLEUM (EAST CHINA)
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