a power island

A technology of power supply side and power controller, which is applied in the direction of electrical components, circuit devices, emergency power supply arrangements, etc., can solve the problems of circulating current and long switching time, and achieve the effect of effective control, eliminating circulating current and realizing seamless switching

Active Publication Date: 2017-10-13
HUAZHONG UNIV OF SCI & TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0010] In view of the above defects or improvement needs of the prior art, the present invention provides a power supply island, which solves the technical problems of circulating current and long switching time in the parallel power supply or switching process of the multi-power supply system in the prior art

Method used

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Effect test

Embodiment 1

[0078] The structure of embodiment 1 is as Figure 5 As shown; two external power supplies S1 and S2 provide power supply island 1 pair of double loads LD1 and LD2 through Embodiment 1, and adopt a three-phase four-wire connection mode; including a group of three-phase four-wire busbars 14, composed of two sets of three SPC 2 composed of single-phase converter system 7, LPC 3 composed of 2 sets of three-phase single-phase converter system 7, 1 set of 3-phase 4-wire DCS 13, 1 set of emergency power supply system 5;

[0079] Among them, the AC input terminal of the SPC is used as a port for connecting the three-phase ABC of the external power supply, and the AC output terminal is connected to the ABC three-phase of the AC bus; 2 external three-phase power supplies S 1 , S 2 The ABC three-phase of the AC bus is connected to the ABC three-phase of the AC bus through the SPC;

[0080] The AC output port of the LPC is used as the port connecting the external load ABC three-phase; 2 ...

Embodiment 2

[0097] The structure of embodiment 2 is as Figure 6 As shown, two external power supplies S1 and S2 provide power supply island 1 pair of double loads LD1 and LD2 through Embodiment 2, and adopt a three-phase three-wire connection mode; including one set of three-phase three-wire busbars 14, composed of two sets of three single-phase SPC 2 composed of converter system 7, LPC 3 composed of 2 sets of three-phase fast electronic switches 15, 1 set of three-phase three-wire DCS 4, and 1 set of emergency power supply system 5;

[0098] Among them, the AC input terminal of the SPC is used as a port to connect to an external power supply, and the AC output terminal is connected to the AC busbar; 2 external three-phase power supplies S 1 , S 2 Connected to the AC bus through SPC;

[0099] The AC port of the LPC is used as the port to connect the external load; 2-way load LD 1 、LD 2 Connect to the AC bus through the AC side of the LPC;

[0100] The emergency power system is conne...

Embodiment 3

[0107] The structure of the power supply island provided by Embodiment 3 is as follows Figure 7 As shown; two external power supplies S1 and S2 provide power supply island 1 to double load LD1 and LD2 through embodiment 3, and adopt a three-phase three-wire wiring mode; embodiment 3 provides power supply island 1 including a set of three-phase three-wire busbars 14 , SPC 2 composed of two sets of three-phase single-phase converter systems 7, LPC 3 composed of two sets of three-phase single-phase converter systems 7, one set of three-phase three-wire DCS 4, and one set of emergency power supply system 5;

[0108] Among them, the AC input terminal of the SPC is used as a port to connect to an external power supply, and the AC output terminal is connected to the AC busbar; 2 external three-phase power supplies S 1 , S 2 Connected to the AC bus through SPC;

[0109] The AC output port of the LPC is used as the port to connect the external load; 2 loads LD 1 、LD 2 Connect to t...

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Abstract

The invention discloses a power island, comprising an SPC (Source Power Conditioner), an LPC (Load Power Conditioner), a DCS (DC Converter System), an emergency power supply system and an AC bus, wherein the SPC is formed by m sets of three single-phase conversion systems composed of 3m series transformers and 3m single-phase convertors; the LPC is formed by n sets of three single-phase conversion systems composed of 3n series transformers and 3n single-phase convertors; the DCS is formed by two sets of three-phase three-wire convertors spare for each other and a DC bus. According to the invention, m paths of power supply provide power for n paths of important loads through the power island; the power island can realize the seamless switching among a plurality of paths of power supply, rapid voltage support, seamless grid connection of an emergency power supply system, and maintenance of load normal work, and meanwhile realize voltage harmonic wave, current harmonic wave, and reactive power compensation; in addition, the power island can restrain impact load active fluctuation, realize peak load shifting, and eliminate the circulation caused by direct parallel connection of a plurality of paths of power supply or active loads; besides, the power island can isolate the fault current generated in case of load faults, and meet the requirements of high reliability and high quality for electric energy by important loads.

Description

technical field [0001] The invention belongs to the technical field of electrical engineering, and more specifically relates to a power supply island. Background technique [0002] In the production and life of modern society, such as electric arc furnaces and rolling mills of iron and steel enterprises, instruments and control equipment of petrochemical enterprises, electrolytic cells of aluminum electrolysis enterprises, underground ventilation systems of coal mines, railway dispatching command systems, power grid dispatching automation master stations, industrial Ethernet For important loads such as switches, large information center computer rooms, radio and television network company computer rooms, medical and surgical equipment, national government agencies, political conference centers, emergency command centers, important event venues, and important experimental equipment, once the power supply is interrupted, it will cause major damage. Political impact, economic l...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H02J3/00H02J9/08H02J3/28H02J3/01H02J3/26H02J3/18
CPCY02E40/30Y02E40/40Y02E40/50
Inventor 毛承雄王丹王元超黄佩梁宇萧珺张高言陆继明
Owner HUAZHONG UNIV OF SCI & TECH
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