CN103532402A - Power supply power distribution system and method - Google Patents
Power supply power distribution system and method Download PDFInfo
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- CN103532402A CN103532402A CN201310426896.5A CN201310426896A CN103532402A CN 103532402 A CN103532402 A CN 103532402A CN 201310426896 A CN201310426896 A CN 201310426896A CN 103532402 A CN103532402 A CN 103532402A
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Abstract
The invention relates to the power supply field, in particular to a power supply power distribution system and method. The power supply power distribution system comprises a multi-pulse-wave rectification loop and a DC (direct current)/DC power supply installed on electric equipment, wherein the multi-pulse-wave rectification loop comprises a transformer and a full-wave rectification circuit; and the multi-pulse-wave rectification loop is connected with the DC/DC power supply via a direct-current power transmission line. According to the power supply power distribution system and method disclosed by the invention, the problems of high transmission line loss, high alternating current UPS (uninterrupted power supply) configuration cost and big system harmonic wave in the prior art can be solved.
Description
Technical field
The present invention relates to field of power supplies, particularly a kind of source power distribution system and method.
Background technology
In modern industry is produced, for large-scale production, often need identical or similar tens of, hundreds of equipment to move in same workshop, every of these equipment all need the power supply (hereinafter to be referred as power supply) of high-power heating power supply or other purposes.Power supply is exported normally direct current, certain frequency and is exchanged or frequency conversion output, because whole equipment electric power system power is large, every power supply reliability, power factor, humorous sweep efficiency has been proposed to high requirement.Guarantee equipment long time stability operation like this, and meet the requirement of national grid to harmonic wave, power factor.
In the existing industrial enterprise of China electric power system, user side all adopts standard 3 phase 380V, 50Hz Alternating Current Power Supply, and the design of all power consumption equipments, manufacture all match according to this standard.As shown in Figure 1, the monocrystalline silicon production of modern industry, conventionally in a workshop, arrange tens of, up to a hundred single crystal growing furnaces even, three-phase 35kV high-tension electricity from electrical network becomes 3 phase 380V of standard by distribution transformer step-down, connect 10～20 single crystal growing furnaces under distribution transformer, and every thermal field of single crystal furnace heating power is 80～200kW, power consumption equipment is in order to mate with controller switching equipment, and power consumption equipment all adopts 3 phase 380V configurations with distrbution network.The power supply of 3 phase 380V alternating current access power consumption equipments, power supply is for conversion into the required direct current of equipment thermal field by 3 phase 380V alternating currents, example as shown in Figure 2, the rectification circuit that the heating power supply input of single crystal growing furnace is constituted by a diode conventionally forms, three-phase 380V rectification obtains 540V left and right direct voltage by filter circuit filtering, the PWM chopper circuit forming via switch elements such as IGBT or MOSFET again, DC chopped-wave is become to 5～20kHz high frequency square wave, send into after high frequency transformer step-down the required direct current of rectifying and wave-filtering output loading.
Current source power distribution system, due to controller switching equipment and power consumption equipment employing standard A C3 Φ 380V distribution, is deposited deficiency in the following areas:
(1), need three distributing cables between controller switching equipment and power consumption equipment, in addition because distribution voltage is low, in the situation that guaranteeing through-put power, the electric current of the distributing cable of flowing through is large, and then causes distributing cable sectional area large, and loss is high, cost is high;
(2), power consumption equipment is in order to mate with controller switching equipment, the incoming end of power consumption equipment need be designed to the standard of 3 cross streams 380V, the in the situation that of the equipment of assurance uninterrupted power supply, need be simultaneously for power consumption equipment configuration exchanges UPS, but interchange UPS cost is high, poor reliability.
(3), because the power input of power consumption equipment adopts diode or thyristor rectifier capacitor filter, can produce larger harmonic wave, power consumption equipment and electrical network are produced and are polluted, adopt harmonic wave control increasing device to drop into and power loss, reduce equipment dependability.
(4), due to power consumption equipment access be three-phase alternating current, IGBT rectifier power source need configure rectification filtering circuit, by three-phase alternating current rectifying and wave-filtering, is the required direct current in power supply rear end.Due to IGBT power configuration rectification filtering circuit, make IGBT rectifier power source volume, weight larger, be not easy to install.
Summary of the invention
The object of the invention is to overcome the above-mentioned deficiency of prior art, a kind of new source power distribution system and method are provided, can overcome and in prior art, have that transmission line loss is high, configuration exchanges the problem that UPS cost is high, system harmonics is large.
For achieving the above object, the invention provides following technical scheme:
, comprising multi-pulse rectification loop and be arranged on the DC/DC power supply on power consumption equipment, described multi-pulse rectification loop comprises transformer and full-wave rectifying circuit, described multi-pulse rectification loop is connected with DC/DC power supply by DC transmission line.
In above-mentioned source power distribution system, described multi-pulse rectification loop is 24 pulse wave rectifier loops, comprises two 12 pulse wave axial direction double bundle formula rectifier transformers and four groups of full-wave rectification bridges.
In above-mentioned source power distribution system, described DC/DC power supply comprises filter circuit, IGBT inverter circuit, reduction voltage circuit and current rectifying and wave filtering circuit.
In above-mentioned source power distribution system, described filter circuit is LC filter circuit.
In above-mentioned source power distribution system, described current rectifying and wave filtering circuit is diode rectification filter circuit or thyristor rectifier filter circuit.
A distribution method, by the three-phase high-voltage access multi-pulse rectification loop from electrical network, in multi-pulse rectification loop, complete step-down and rectification after direct output of DC current electricity supply and use equipment use.
In above-mentioned power supply distribution method, described multi-pulse rectification loop is 24 pulse wave rectifier loops, comprise two 12 pulse wave axial direction double bundle formula rectifier transformers and four groups of full-wave rectification bridges, two groups of windings of every rectifier transformer valve side are connected into respectively d connection and y connection, make differing of 30 ° of the natural formation of its line voltage, the net side of two rectifier transformers all adopts extend-triangle connection, difference phase shift ± 7.5 °, just formed the phase place of 15 ° of line voltage phasor mutual deviations of four groups of valve side windings of two rectifier transformers, each winding is respectively after full-wave rectification, at DC side parallel, move.
compared with prior art, beneficial effect of the present invention:multi-pulse rectification of the present invention loop will divide the source power distribution system and the rectifier power source that are arranged to combine in the past, by behind the three-phase high-voltage access multi-pulse rectification loop from electrical network, complete step-down and rectification in multi-pulse rectification loop after, direct output of DC current electricity supply and use equipment is used, and the beneficial effect bringing is thus:
(1), the distributing cable radical between controller switching equipment and power consumption equipment is reduced, transformer output voltage in improving multi-pulse rectification loop, can obtain higher VD, in the situation that through-put power is certain, higher direct voltage can reduce the size of electric current on cable greatly, and then reduce the sectional area of direct current transportation cable, the direct benefit of bringing to enterprise is thus to have reduced the metal material such as copper, aluminium consumption on transmission line, there is not AC inductance loss in direct current transportation in addition, can reduce the electric energy loss on transmission line.
(2), controller switching equipment and power consumption equipment adopt direct current route, the backup battery of corresponding power consumption equipment also can be configured to direct current UPS, direct current UPS is simple in structure, take up an area less, cost is low, stability is high.
(3), because the current on line side percent harmonic distortion in multi-pulse rectification loop is extremely low, therefore without the power input at power consumption equipment, harmonic decrease devices is installed, reduce thus this equipment component cost and dropped into, and owing to not having harmonic decrease devices to produce power loss, improved system effectiveness; Minimum by the resulting galvanic ripple in multi-pulse rectification loop in addition, can greatly reduce the capacitance in LC filter circuit in DC/DC power supply, and then can reduce costs, improve reliability.
(4), rear direct current output is directly processed the three-phase high-voltage step-down rectifier from electrical network in multi-pulse rectification loop, the rectifier power source of supporting power consumption equipment self can adopt DC/DC power supply with it, DC/DC power supply is little with respect to AC/DC power volume in the past, lightweight, convenient installation placed, and saves space.
Accompanying drawing explanation
Fig. 1 is modern enterprise equipment current supply circuit schematic diagram.
Fig. 2 is the major loop schematic diagram of IGBT rectifier power source.
Fig. 3 is the circuit catenation principle figure of power supply distribution method in the present invention.
Fig. 4 is 24 pulse wave rectifier circuit theory figure in the present invention.
Fig. 5 is DC/DC power supply major loop schematic diagram in the present invention.
Mark in figure: 1-24 pulse wave rectifier loop, 2-DC/DC power supply, 3-12 pulse wave axial direction double bundle formula rectifier transformer, 4-full-wave rectification bridge.
Embodiment
Below in conjunction with the drawings and specific embodiments, invention is further described.
In order to make object of the present invention, technical scheme and advantage clearer, below in conjunction with drawings and Examples, the present invention is further elaborated.Should be appreciated that specific embodiment described herein, only in order to explain the present invention, is not intended to limit the present invention.
As shown in accompanying drawing 3, accompanying drawing 4, accompanying drawing 5, the present embodiment source power distribution system, comprise 24 pulse wave rectifier loops 1 and be arranged on the DC/DC power supply 2 on power consumption equipment, described 24 pulse wave rectifier loops 1 comprise two 12 pulse wave axial direction double bundle formula rectifier transformers 3 and four groups of full-wave rectification bridges 4, described 24 pulse wave rectifier 1 loops are connected with DC/DC power supply 2 by DC transmission line, and described DC/DC power supply 2 comprises LC filter circuit, IGBT inverter circuit, reduction voltage circuit and diode rectification filter circuit.
The present embodiment also provides a kind of new power supply distribution method on the basis of above-mentioned source power distribution system, as shown in Figure 3, three-phase 35kV high-tension electricity from electrical network is accessed to 24 pulse wave rectifier loops 1, and after 1 li, 24 pulse wave rectifier loop completes step-down rectifier, direct output of DC current electricity supply and use equipment is used.As shown in Figure 4, 24 pulse wave rectifier loops 1 comprise two 12 pulse wave axial direction double bundle formula rectifier transformers 3 and four groups of full-wave rectification bridges 4, two groups of windings of every 12 pulse wave axial direction double bundle formula rectifier transformer 3 valve sides are connected into respectively d connection and y connection, make differing of 30 ° of the natural formation of its line voltage, the net side of two 12 pulse wave axial direction double bundle formula rectifier transformers 3 all adopts extend-triangle connection, difference phase shift ± 7.5 °, just formed the phase place of 15 ° of line voltage phasor mutual deviations of four groups of valve side windings of two rectifier transformers, each winding is respectively after full-wave rectification, at DC side parallel, move.
The 24 pulse wave rectifier loops 1 of the present embodiment will divide the distribution transformer and the rectification circuit that are arranged to combine in the past, 35kV high pressure from electrical network is accessed behind 24 pulse wave rectifier loops 1, through two 12 pulse wave axial direction double bundle formula rectifier transformer 3 step-downs, after four groups of full-wave rectification bridge 4 rectifications, exporting direct current electricity supply and use equipment uses again, direct current transportation has reduced the radical of transmission cable between controller switching equipment and power consumption equipment, only needs two power cables; In addition by improving the output voltage in 24 pulse wave rectifier loops 1, in the situation that through-put power is certain, higher VD can reduce the size of electric current on transmission cable greatly, and then can reduce the sectional area of transmission cable, the direct benefit of bringing to enterprise is thus to have reduced the metal material such as copper, aluminium consumption on transmission line, there is not AC inductance loss in direct current transportation in addition, can reduce the electric energy loss on transmission line.Because controller switching equipment and power consumption equipment adopt direct current route, the backup battery of corresponding power consumption equipment also can be configured to direct current UPS, and direct current UPS is simple in structure, take up an area less, cost is low, stability is high.
24 pulse wave rectifier loops 1 comprise two 12 pulse wave axial direction double bundle formula rectifier transformers 3 and four groups of full-wave rectification bridges 4, two groups of windings of every 12 pulse wave axial direction double bundle formula rectifier transformer 3 valve sides are connected into respectively d connection and y connection, and the net side of two 12 pulse wave axial direction double bundle formula rectifier transformers 3 all adopts extend-triangle connection.Special connection due to rectifier transformer valve side and net side, the current on line side percent harmonic distortion in 24 pulse wave rectifier loops 1 is only 6.3%, therefore without the power input at power consumption equipment, harmonic decrease devices is installed, having reduced thus this equipment component cost drops into, and the efficiency losses producing without harmonic decrease devices, has improved system effectiveness.Minimum by the 24 resulting galvanic ripples in pulse wave rectifier loop 1, can greatly reduce the capacitance in the interior LC filter circuit of DC/DC power supply 2, and then can reduce costs, improve reliability.
The foregoing is only preferred embodiment of the present invention, not in order to limit the present invention, all any modifications of doing within the spirit and principles in the present invention, be equal to and replace and improvement etc., within all should being included in protection scope of the present invention.
Claims (7)
1. a source power distribution system, it is characterized in that: comprise multi-pulse rectification loop and be arranged on the DC/DC power supply on power consumption equipment, described multi-pulse rectification loop comprises transformer and full-wave rectifying circuit, and described multi-pulse rectification loop is connected with DC/DC power supply by DC transmission line.
2. source power distribution system according to claim 1, is characterized in that: described multi-pulse rectification loop is 24 pulse wave rectifier loops, comprises two 12 pulse wave axial direction double bundle formula rectifier transformers and four groups of full-wave rectification bridges.
3. source power distribution system according to claim 1, is characterized in that: described DC/DC power supply comprises filter circuit, IGBT inverter circuit, reduction voltage circuit and current rectifying and wave filtering circuit.
4. source power distribution system according to claim 3, is characterized in that: described filter circuit is LC filter circuit.
5. source power distribution system according to claim 3, is characterized in that: described current rectifying and wave filtering circuit is diode rectification filter circuit or thyristor rectifier filter circuit.
6. a power supply distribution method, is characterized in that: by the three-phase high-voltage access multi-pulse rectification loop from electrical network, in multi-pulse rectification loop, complete step-down and rectification after direct output of DC current electricity supply and use equipment use.
7. power supply distribution method according to claim 6, it is characterized in that: described multi-pulse rectification loop is 24 pulse wave rectifier loops, comprise two 12 pulse wave axial direction double bundle formula rectifier transformers and four groups of full-wave rectification bridges, two groups of windings of every rectifier transformer valve side are connected into respectively d connection and y connection, make differing of 30 ° of the natural formation of its line voltage, the net side of two rectifier transformers all adopts extend-triangle connection, difference phase shift ± 7.5 °, just formed the phase place of 15 ° of line voltage phasor mutual deviations of four groups of valve side windings of two rectifier transformers, each winding is respectively after full-wave rectification, at DC side parallel, move.
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| CN105574291A (en) * | 2016-01-20 | 2016-05-11 | 江苏科能电力工程咨询有限公司 | Automatic power supply loop configuration method and system |
| CN106373059A (en) * | 2016-11-30 | 2017-02-01 | 桂林市逸仙中学 | Campus student account system based on fingerprint identification |
| CN106384445A (en) * | 2016-11-25 | 2017-02-08 | 钦州市高新技术产业服务中心 | Shopping mall object storage cabinet control system with fingerprint identification function |
| CN106408779A (en) * | 2016-11-25 | 2017-02-15 | 钦州市高新技术产业服务中心 | Mall article storage cabinet control system with iris recognition |
| CN106408778A (en) * | 2016-11-25 | 2017-02-15 | 钦州市高新技术产业服务中心 | Face-identification control system of emporium object storing cabinet |
| CN106408305A (en) * | 2016-11-30 | 2017-02-15 | 桂林市逸仙中学 | School student account system based on face identification |
| CN106447334A (en) * | 2016-11-30 | 2017-02-22 | 桂林市逸仙中学 | School student one card through control consumption monitor system |
| CN106447340A (en) * | 2016-11-30 | 2017-02-22 | 桂林市逸仙中学 | School students account system based on iris technology |
| CN106447922A (en) * | 2016-11-30 | 2017-02-22 | 桂林市逸仙中学 | Student one-card-through consumption management system |
| CN106564397A (en) * | 2016-11-07 | 2017-04-19 | 上海泓语电气技术有限公司 | Direct-current charging type charging station system |
| CN106712272A (en) * | 2015-11-18 | 2017-05-24 | 中国移动通信集团设计院有限公司 | Uninterrupted power source system |
| CN115912586A (en) * | 2023-03-14 | 2023-04-04 | 广东天枢新能源科技有限公司 | Direct-current bus type liquid-cooled ultra-fast charging method and system |
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Cited By (13)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN106712272A (en) * | 2015-11-18 | 2017-05-24 | 中国移动通信集团设计院有限公司 | Uninterrupted power source system |
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| CN105574291A (en) * | 2016-01-20 | 2016-05-11 | 江苏科能电力工程咨询有限公司 | Automatic power supply loop configuration method and system |
| CN106564397A (en) * | 2016-11-07 | 2017-04-19 | 上海泓语电气技术有限公司 | Direct-current charging type charging station system |
| CN106408779A (en) * | 2016-11-25 | 2017-02-15 | 钦州市高新技术产业服务中心 | Mall article storage cabinet control system with iris recognition |
| CN106408778A (en) * | 2016-11-25 | 2017-02-15 | 钦州市高新技术产业服务中心 | Face-identification control system of emporium object storing cabinet |
| CN106384445A (en) * | 2016-11-25 | 2017-02-08 | 钦州市高新技术产业服务中心 | Shopping mall object storage cabinet control system with fingerprint identification function |
| CN106408305A (en) * | 2016-11-30 | 2017-02-15 | 桂林市逸仙中学 | School student account system based on face identification |
| CN106447334A (en) * | 2016-11-30 | 2017-02-22 | 桂林市逸仙中学 | School student one card through control consumption monitor system |
| CN106447340A (en) * | 2016-11-30 | 2017-02-22 | 桂林市逸仙中学 | School students account system based on iris technology |
| CN106447922A (en) * | 2016-11-30 | 2017-02-22 | 桂林市逸仙中学 | Student one-card-through consumption management system |
| CN106373059A (en) * | 2016-11-30 | 2017-02-01 | 桂林市逸仙中学 | Campus student account system based on fingerprint identification |
| CN115912586A (en) * | 2023-03-14 | 2023-04-04 | 广东天枢新能源科技有限公司 | Direct-current bus type liquid-cooled ultra-fast charging method and system |
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Application publication date: 20140122 |