Low-voltage direct-current power supply and distribution equipment and method

A low-voltage direct current, power supply and distribution technology, which is applied in the field of low-voltage power supply and distribution system of secondary and above-load user workshops, can solve the problems of double-circuit lines/dual power supply, etc., and achieve good energy-saving effect, wide voltage application range, and reliability sex high effect

Pending Publication Date: 2020-03-24
JIANGSU DELI CHEM FIBER CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0014] Aiming at the shortcoming that AC power supply and distribution system cannot operate in parallel for a long time with double circuit lines/dual power sources, the present invention provides a low-voltage

Method used

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  • Low-voltage direct-current power supply and distribution equipment and method
  • Low-voltage direct-current power supply and distribution equipment and method
  • Low-voltage direct-current power supply and distribution equipment and method

Examples

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Embodiment Construction

[0041] The low-voltage DC power supply and distribution equipment provided by the present invention, such as figure 2 As shown in the schematic diagram, starting from the output of the three-phase low-voltage transformer, it is followed by the current sharing unit 1, the three-phase rectification unit 2, the reverse protection unit 3, the voltage / current detection unit 4, the DC filter unit 5, and the circuit distribution unit 6 , DC load unit 7, inverter unit 8, energy storage unit 9 and central data processing unit 10.

[0042]The current sharing unit 1 includes the current sharing of two power supply circuits and the current sharing between two rectifier modules connected in parallel in the same power supply circuit. The passive current sharing device selected is a current sharing transformer, which makes the two power supply circuits The current achieves current sharing.

[0043] The voltage / current detection unit 4 is figure 2 The system represented by the whole dotte...

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Abstract

The invention discloses low-voltage direct-current power supply and distribution equipment which comprises a current sharing unit, a three-phase rectification unit, a non-return protection unit, a voltage/current detection unit, a direct-current filtering unit, a loop distribution unit, a direct-current load unit, an energy storage unit and a central data processing unit which are sequentially arranged from the output end of a low-voltage transformer according to an input and output relation. The invention further discloses a low-voltage direct-current power supply and distribution method, thelow-voltage direct-current power supply and distribution equipment is adopted, double-circuit line/double-power-supply low-voltage three-phase alternating current is rectified into two paths of direct current, and the two paths of direct current are connected in parallel and directly supplied to a direct-current load. Aiming at the defect that double circuits/double power supplies of an alternating current power supply and distribution system cannot operate in parallel for a long time, the invention provides a technology of a low-voltage direct current power supply and distribution system, and the direct current double circuits/double power supplies are made to operate in parallel, so that the power supply continuity and stability of the power supply and distribution system are improved.

Description

technical field [0001] The invention is applied to a low-voltage power supply and distribution system, and in particular relates to a device and method for a low-voltage power supply and distribution system in a user workshop with secondary and above loads. Background technique [0002] At present, most users' low-voltage power supply and distribution systems are three-phase AC power supply. Users with secondary and above loads are powered by dual circuit lines / dual power sources to ensure the reliability of power supply. [0003] Due to the characteristics of alternating current, if double-circuit lines / dual power supplies are required to operate in parallel, they need to have the same cycle and phase. There is inevitably a voltage difference in the double-circuit line power supply, and there is a problem of circulating current when running in parallel. Therefore, the power supply system of dual-circuit line / dual power supply operates independently. When one circuit / power...

Claims

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Application Information

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IPC IPC(8): H02J1/10
CPCH02J1/10
Inventor 赵金广宋江颂张金龙朱聃聃宋占伟张孟
Owner JIANGSU DELI CHEM FIBER CO LTD
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