CN203166518U - High-current power supply circuit - Google Patents
High-current power supply circuit Download PDFInfo
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- CN203166518U CN203166518U CN 201320189894 CN201320189894U CN203166518U CN 203166518 U CN203166518 U CN 203166518U CN 201320189894 CN201320189894 CN 201320189894 CN 201320189894 U CN201320189894 U CN 201320189894U CN 203166518 U CN203166518 U CN 203166518U
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Abstract
The utility model discloses a high-current power supply circuit and relates to the field of circuit design. The high-current power supply circuit of the utility model comprises rectifier transformers arranged in a transformer chamber and at least one rectifier unit, wherein each rectifier unit includes a diode rectifier and a DC/DC module, the rectifier transformers are connected to a high-voltage power grid through switches, the transformers are connected with the DC/DC modules through the diode rectifiers, and the DC/DC modules are connected to a load in a production workshop. By increasing transmission voltage in the high-current power supply circuit, transmission current can be effectively reduced under the condition of same transmission power, the use of copper and aluminum in a transmission line is reduced, the section and the weight of the transmission line are reduced, cost is saved, and power loss of the transmission line is reduced.
Description
Technical field
The utility model relates to circuit design field, particularly a kind of big electric current current supply circuit.
Background technology
In industrial production, often need big electric current power supply, as industries such as electrolysis, plating, chemical industry for making chlorine and alkali, metallurgy.The power supply of these industries has power supply for direct current, the voltage low current is big, power is big, the demanding feature of power supply reliability.Because in electrolysis, the chemical process, technology requires the galvanic current source, its electric current is big (general tens kilo-amperes are to the hundreds of kilo-ampere) especially, and electrolysis tank length is longer.
Big electric current for providing production to need is built a rectifier in the outside, workshop usually at present, is used for the AC rectification of input is become controlled direct current, and the current/voltage of this rectifier output is the direct current voltage that production needs.Present big electric current current supply circuit as shown in Figure 1, in existing current supply circuit, the rectifying and pressure-regulating unit is installed in the rectifier 1, every group of rectifying and pressure-regulating unit comprises rectifier transformer T and rectification voltage regulator, the big electric current that output needs after the parallel connection of many rectifying and pressure-regulating units is sent in the load 4 of workshop 3 by remote big current delivery line 2 again.Because the big direct current characteristic that this type of load needs, in the present current supply circuit, rectification voltage regulator mainly contains following two kinds of execution modes:
One, adopt the thyristor rectifier technology: the phase shifting angle α by the control thyristor, reach the adjusting output voltage, and then the constant output electric current.In this mode, because the rectifying device output current is the non-sinusoidal shaped current that changes with phase shifting angle, increase the harmonic wave of power supply, and reduced the power factor of power supply.In order to improve power factor, reduce apparent power and harmonic wave to the influence of power grid quality, usually at rectifier transformer a plurality of pressure regulation gears are set, according to the production technology needs, regulate tap changer to select suitable voltage gear, make at output voltage one regularly the phase shifting angle minimum, to improve the power factor of power supply as far as possible, reduce harmonic wave;
Two, adopt diode to add saturable reactor current stabilization technology: when adopting diode rectification, its pressure regulation process is finished with saturable reactor by the voltage regulating transformer that has the voltage adjustment of on-load switch.Because the adjustable range of saturable reactor is little, the voltage regulating transformer that need have the voltage adjustment of on-load switch is finished grade adjusting that has of alternating voltage, regulates output voltage by saturable reactor in small range, to satisfy production technology to the requirement of size of current and stability.
But rectifier transformer all needs different gears are set in the such scheme, and rectifier transformer all needs according to the required ceiling voltage of load, and maximum current is made, rectifier transformer manufacture and design equal complexity, bulky, expensive; Need tap changer constantly to regulate the transformer gear in running, require and the pressure regulation requirement of diode rectification mode with the power factor that satisfies the thyristor current stabilization, it acts frequently, and the life-span is short, maintenance capacity is big, and complicated operation; After rectifier is concentrated rectification, direct current is transferred to load, because long transmission distance, electric current is big, the loss of transmission line copper, aluminium big and that need are arranged the big Heavy Weight in cross section; And adopt the thyristor rectifier mode, its power factor is low, produces a large amount of harmonic waves, needs the configure dedicated reactive power compensator.
Summary of the invention
The purpose of this utility model is to overcome existing above-mentioned deficiency in the prior art, and a kind of big electric current current supply circuit of simplifying rectifier transformer production, reducing the transformer production cost is provided.
In order to realize the foregoing invention purpose, the utility model provides following technical scheme:
A kind of big electric current current supply circuit, comprise the rectifier transformer at least one Rectification Power Factor and the transformer room, described Rectification Power Factor comprises diode rectifier and DC/DC module, described rectifier transformer is connected in high-voltage fence by switch, described transformer is connected in the DC/DC module by diode rectifier, described DC/DC module is connected in the load of workshop, the alternating current that is provided by high-voltage suppling power is after the transformer step-down, be delivered to the diode rectifier that is connected in transformer, described diode rectifier becomes direct current with AC rectification, and being delivered to described DC/DC module, described DC/DC module is carried out this direct current pressure regulation and is flowed to load.
Preferably, in the above-mentioned big electric current current supply circuit, a diode rectifier is parallel with one or more DC/DC modules.Direct voltage after the diode rectifier rectification is N times that load needs voltage.
Preferably, in the above-mentioned big electric current current supply circuit, described diode rectifier and described DC/DC module are arranged at the load periphery in the workshop.Form between from the transformer room to the workshop and exchange transmission.
Preferably, in the above-mentioned big electric current current supply circuit, described diode rectifier is arranged in the transformer room, and described DC/DC module is arranged at the load periphery in the workshop.Form direct current transmission between from the transformer room to the workshop, the staff can judge selection according to field conditions.
Compared with prior art, the beneficial effects of the utility model:
1, because a kind of big electric current current supply circuit of the utility model passes through to improve the transmission voltage in the big electric current current supply circuit, when the transmission equal-wattage, can effectively reduce transmission current, thereby reached the use amount that reduces copper in the transmission line, aluminium, reduce cross section and the weight of transmission line, save cost, and reduced the transmission line energy loss.
2, because a kind of big electric current current supply circuit of the utility model carries out pressure regulation by the DC/DC module, make transformer not need to arrange the pressure regulation gear, also no longer need to arrange tap changer, simplified design and the manufacturing of transformer, saved the cost of Rectification Power Factor.
3, by Rectification Power Factor in a kind of big electric current current supply circuit of the utility model, can improve the power factor (PF) of big electric current large power supply, the user no longer needs to use special reactive power compensation unit, reduces electric network pollution.
Description of drawings:
Fig. 1 is big electric current current supply circuit principle schematic in the prior art.
Fig. 2 is big electric current current supply circuit principle schematic in the utility model.
Fig. 3 is the principle schematic of embodiment 2 in the utility model.
Mark among the figure: 1-rectifier, 2-rectification voltage regulator, the big current delivery line of 3-, 4-workshop, 5-load, 6-DC/DC module, 7-diode rectifier, 8-transformer room.
Embodiment
Below in conjunction with test example and embodiment the utility model is described in further detail.But this should be interpreted as that the scope of the above-mentioned theme of the utility model only limits to following embodiment, all technology that realizes based on the utility model content all belong to scope of the present utility model.
A kind of big electric current current supply circuit, comprise the rectifier transformer at least one Rectification Power Factor and the transformer room 8, described Rectification Power Factor comprises diode rectifier 7 and DC/DC module 6, described rectifier transformer is connected in high-voltage fence by switch, described transformer is connected in DC/DC module 6 by diode rectifier 7, described DC/DC module 6 is connected in the load 5 of workshop 4, the alternating current that is provided by high-voltage suppling power is after the transformer step-down, be delivered to the diode rectifier 7 that is connected in rectifier transformer, described diode rectifier 7 becomes direct current with AC rectification, and being delivered to described DC/DC module 6, described DC/DC module 6 is carried out this direct current pressure regulation and is flowed to load 5.
The electric pressure of the fixing output of transformer through calculating, make voltage behind the diode rectification be load need voltage N doubly, the electric current of then importing DC/DC module 6 is the 1/N of load current.Because the electric current before the input DC/DC module 6 reduces, and makes transformer be reduced to below the original 1/N to the sectional area of the current delivery line of DC/DC module 6; When needing to transmit same big power, can effectively reduce transmission current, reach the use amount that reduces copper in the transmission line, aluminium, reduce the purpose of transmission line energy loss.
And transformer does not need to arrange the pressure regulation gear, does not need to design tap changer yet, has simplified design and the manufacturing of transformer, provides cost savings.
A diode rectifier 7 is parallel with a plurality of DC/DC modules 6.Separate unit DC/DC module 6 output currents are limited in one's ability, use 6 outputs in parallel of many DC/DC modules can satisfy the power of load request, and no longer need special reactive power compensation unit is set, and when having simplified circuit design, reduced the components and parts cost.
Described diode rectifier 7 and described DC/DC module 6 are arranged at load 5 peripheries in the workshop 4.8 to workshop 4 formation interchange transmission from the transformer room.
The utility model is not only applicable to the electrolysis direct current electric power system, is applicable to that other are as needing in the system of high power DC electricity in electrochemistry such as chemical industry for making chlorine and alkali, electrolysis for production copper, plating and the metallurgical industry yet.
Embodiment 2
Identical with embodiment 1, be preferably, described diode rectifier is arranged in the transformer room, and described DC/DC module 6 is arranged at load 5 peripheries in the workshop 4, as shown in Figure 3.8 to workshop 4 formation direct current transmission from the transformer room.
Claims (4)
1. one kind big electric current current supply circuit, comprise the rectifier transformer at least one Rectification Power Factor and the transformer room, it is characterized in that, described Rectification Power Factor comprises diode rectifier and DC/DC module, described rectifier transformer is connected in high-voltage fence by switch, described transformer is connected in the DC/DC module by diode rectifier, described DC/DC module is connected in the load of workshop, the alternating current that is provided by high-voltage suppling power is after the transformer step-down, be delivered to the diode rectifier that is connected in transformer, described diode rectifier becomes direct current with AC rectification, and being delivered to described DC/DC module, described DC/DC module is carried out this direct current pressure regulation and is flowed to load.
2. in the big electric current current supply circuit according to claim 1, it is characterized in that a diode rectifier is parallel with one or more DC/DC modules.
3. in the big electric current current supply circuit according to claim 2, it is characterized in that described diode rectifier and described DC/DC module are arranged at the load periphery in the workshop.
4. in the big electric current current supply circuit according to claim 2, it is characterized in that described diode rectifier is arranged in the transformer room, described DC/DC module is arranged at the load periphery in the workshop.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201320189894 CN203166518U (en) | 2013-04-16 | 2013-04-16 | High-current power supply circuit |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201320189894 CN203166518U (en) | 2013-04-16 | 2013-04-16 | High-current power supply circuit |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN203166518U true CN203166518U (en) | 2013-08-28 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 201320189894 Expired - Fee Related CN203166518U (en) | 2013-04-16 | 2013-04-16 | High-current power supply circuit |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN203166518U (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103178523A (en) * | 2013-04-16 | 2013-06-26 | 四川英杰电气股份有限公司 | Large-current power supply loop |
| WO2024188651A1 (en) * | 2023-03-15 | 2024-09-19 | Siemens Energy Global GmbH & Co. KG | Circuit arrangement, method for operating a circuit arrangement and electrolysis system |
-
2013
- 2013-04-16 CN CN 201320189894 patent/CN203166518U/en not_active Expired - Fee Related
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103178523A (en) * | 2013-04-16 | 2013-06-26 | 四川英杰电气股份有限公司 | Large-current power supply loop |
| WO2024188651A1 (en) * | 2023-03-15 | 2024-09-19 | Siemens Energy Global GmbH & Co. KG | Circuit arrangement, method for operating a circuit arrangement and electrolysis system |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20130828 Termination date: 20200416 |