CN203632556U - High-power variable-frequency inverting power supply and power supply cabinet thereof - Google Patents
High-power variable-frequency inverting power supply and power supply cabinet thereof Download PDFInfo
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- CN203632556U CN203632556U CN201320569701.8U CN201320569701U CN203632556U CN 203632556 U CN203632556 U CN 203632556U CN 201320569701 U CN201320569701 U CN 201320569701U CN 203632556 U CN203632556 U CN 203632556U
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Abstract
A high-power variable-frequency inverting power supply is provided. A rectifying unit rectifies an inputted three-phase power supply and outputs the rectified three-phase power supply. The rectifying unit is connected with an inverting unit through a filtering unit. One input end of the inverting unit is connected with the output end of an inverting drive circuit. The high-power variable-frequency inverting power supply comprises a special capacitor, a special transformer, a direct current voltage sampling circuit, an output current sampling circuit and a power supply control core unit; one input end of the power supply control core unit is connected with the output end of the direct current voltage sampling circuit and the output end of the output current sampling circuit; the input end of the direct current voltage sampling circuit is connected with the output end of the rectifying unit; the input end of the output current sampling circuit is connected with one output end of the inverting unit; the input end of the inverting drive circuit is connected with one output end of the power supply control core unit; a display operation panel is in signal connection with the power supply control core unit; the other output end of the inverting unit is connected with one input end of the special transformer; and one output end of the inverting unit is connected with the special transformer through the special capacitor. The utility model discloses a high-power variable-frequency inverting power supply cabinet which comprises the above power supply.
Description
Technical field
The utility model relates to power supply, particularly a kind of high-power frequency conversion inverter and power cabinet thereof.
Background technology
What traditional oil field well load added thermal recovery is power frequency three phase transformation two-phase band compensation supply power modes, is mainly used in heavy crude heat extraction.This power frequency supply heating, needs three phase transformation two-phases, causes transformer input three-phase voltage seriously uneven, serious to electric network pollution.The defencive function of power frequency supply cabinet is poor, often due to the short circuit of load, open circuit and voltage unstable, cause transformer to burn, thereby make job insecurity.This power frequency supply about 0.7 left and right, has also caused certain waste to electric energy for electrically heated power factor, and the firing rate of load is also slow.
Summary of the invention
The technical problem that the utility model solves be to provide a kind of power factor high, can make that load heating is fast, a kind of high-power frequency conversion inverter of working stability.
A kind of high-power frequency conversion inverter, include rectification unit, filter unit, inversion unit, inversion drives, display operating panel, rectification unit will be exported after the three phase mains rectification of input, rectification unit is connected with inversion unit by filter unit, inversion unit one input is connected with inverse changing driving circuit output, also include extraordinary electric capacity, special transformer, direct voltage sample circuit, output current sample circuit, power supply control core unit, power supply control core unit one input and direct voltage sample circuit, output current sample circuit output connects, direct voltage sample circuit input is connected with rectification unit output, output current sample circuit input is connected with inversion unit one output, inverse changing driving circuit input is connected with power supply control core unit one output, display operating panel is connected with power supply control core cell signal, another output of inversion unit is connected with special transformer one input, inversion unit one output is also connected with special transformer through extraordinary electric capacity.
In described inverse changing driving circuit, be provided with insulated gate bipolar transistor IGBT as device for power switching.
Described power supply control core unit is digital micro-chip processor, the output of direct voltage sample circuit, output current sample circuit is connected with current regulating module, power conditioning module respectively through the AD of digital micro-chip processor modular converter, computing module, SCI communication module is connected with display operating panel signal, power given module is connected with inverse changing driving circuit input through power conditioning module, current regulating module, PWM output module, and I/O control module is connected with external connecting function module.
Described special transformer output is connected with heating load.
A kind of high-power frequency conversion inverter cabinet, comprises power cabinet, is provided with power supply described in the utility model in described power cabinet.
Through overtesting, the utility model has the following aspects advantage compared with power frequency supply.
1, power factor obviously improves.The heating of former power frequency, power factor is about 0.7 left and right, and with variable frequency power supply heating, power factor is more than 0.95 after tested.
2, reduced the pollution to electrical network.After application variable frequency power supply, power factor improves, and harmonic content obviously reduces, and has alleviated the pollution to electrical network.
3, heating effect is obvious.According to kelvin effect, after frequency improves, the energy that load obtains improves, and line loss is corresponding minimizing also, has also improved heating effect.According to test, the comparable power frequency heating of variable-frequency heating 1-2 hour reaches desired effects in advance, and temperature is also high.
4, defencive function is complete.Variable frequency power supply cabinet is owing to adopting DSP to control, and its defencive function is complete, has avoided the problem that causes due to the fault of electrical network and load, ensures the stable operation of system.
5, energy-saving effect is obvious.According to test, every intermediate frequency power cabinet economizes on electricity all in 30% left and right than corresponding industrial frequency cabinet, strong saving electric energy, improved operating efficiency, ensured the effect of heating system.
6, adaptive load wide ranges.Oil field has multiple with electrically heated load: the triumphant cable of steel, and hollow stem, oil pipes etc. are multiple, and native system can adapt to multiple load.
7, output voltage, current continuity is adjustable, can make heating system in optimum Working, energy utilization rate is high, has permanent output voltage/permanent output power selection function.
Therefore say, variable-frequency heating is the revolution of heavy crude heat extraction, and the viscous crude resource of China is quite abundant, promotes this technology, is the effective way that oil recovery industry energy-saving reduces discharging and raises the efficiency.
Brief description of the drawings
Fig. 1 is control principle drawing of the present utility model.
Embodiment
By reference to the accompanying drawings the utility model is described in further detail, as shown in the figure, major loop schematic diagram in the left dotted line frame of accompanying drawing, the direct voltage of exporting behind three phase mains input rectifying unit is given inversion unit in unit after filtering, filter unit provides stable voltage and energy for inversion unit, the voltage and current that the controlled output of inversion unit is given, inversion unit one output is defeated by special transformer after extraordinary electric capacity shaping, another output of inversion unit is directly exported to special transformer, then exports to heating load after being isolated by special transformer.
In right dotted line frame in accompanying drawing, it is power supply control core unit, the digital micro-chip processors such as the DSPMC56F8013 that Freescale company of the employing U.S. produces are power supply control core, SPWM control technology, control system performance strengthens, circuit reduction, workload-adaptability is strong, realizes the total digitalization of power supply control, intellectuality.Power supply control core unit is connected with display operating panel signal, by display operating panel to power supply control core unit input control signal.
Interactive display operating panel, can show operating frequency and electric current by the selection of keyboard, curent change etc., and can show malfunction and reason, and make demonstration more directly perceived, be easier to operation.When work, power supply control core unit is controlled inversion unit by inverse changing driving circuit according to set point, input voltage, output current, output voltage is monitored and computing simultaneously; Adjusting in real time output makes output adapt to load and realizes the protection to major loop.
In inverse changing driving circuit, adopt advanced high-power isolated gate bipolar transistor IGBT as device for power switching, reverse frequency is adjustable.The good switch of more traditional silicon controlled crystal brake pipe is disconnected and switching frequency is high, and volume is little, and electric current is large.
For ease of installing, transport, using, power supply of the present utility model is located in power cabinet.
In the region distributing in several heavy oil wells such as Nanyang Oil Field, Dagang Oilfield, Shengli Oil Field, carry out the heat run of this power supply.Adjust by scene, in conjunction with heating cable and power, generally frequency is adjusted to 500Hz-800Hz left and right, has improved 10 times than power frequency, adjust electric current according to power, the electric power outputting current of general 75kW is in 80A left and right, the power supply of 93kW is in 100A left and right, by intermediate frequency transformer, about output voltage 800V, series connection output voltage is 500V, 600V, 700V, 800V, and the heating of this power supply and the effect such as energy-conservation are fairly obvious.
Claims (4)
1. a high-power frequency conversion inverter, include rectification unit, filter unit, inversion unit, inversion drives, display operating panel, rectification unit will be exported after the three phase mains rectification of input, rectification unit is connected with inversion unit by filter unit, inversion unit one input is connected with inverse changing driving circuit output, it is characterized in that: also include extraordinary electric capacity, special transformer, direct voltage sample circuit, output current sample circuit, power supply control core unit, power supply control core unit one input and direct voltage sample circuit, output current sample circuit output connects, direct voltage sample circuit input is connected with rectification unit output, output current sample circuit input is connected with inversion unit one output, inverse changing driving circuit input is connected with power supply control core unit one output, display operating panel is connected with power supply control core cell signal, another output of inversion unit is connected with special transformer one input, inversion unit one output is also connected with special transformer through extraordinary electric capacity.
2. a kind of high-power frequency conversion inverter according to claim 1, is characterized in that: in described inverse changing driving circuit, be provided with insulated gate bipolar transistor IGBT as device for power switching.
3. according to claim 1 or 2 one kind of high-power frequency conversion inverter, it is characterized in that: described special transformer output is connected with heating load.
4. a high-power frequency conversion inverter cabinet, comprises power cabinet, it is characterized in that: in described power cabinet, be provided with the power supply described in claim 1 or 2.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201320569701.8U CN203632556U (en) | 2013-09-15 | 2013-09-15 | High-power variable-frequency inverting power supply and power supply cabinet thereof |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201320569701.8U CN203632556U (en) | 2013-09-15 | 2013-09-15 | High-power variable-frequency inverting power supply and power supply cabinet thereof |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN203632556U true CN203632556U (en) | 2014-06-04 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201320569701.8U Expired - Lifetime CN203632556U (en) | 2013-09-15 | 2013-09-15 | High-power variable-frequency inverting power supply and power supply cabinet thereof |
Country Status (1)
| Country | Link |
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| CN (1) | CN203632556U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104578891A (en) * | 2014-11-27 | 2015-04-29 | 南通三信塑胶装备科技股份有限公司 | Plasma processing machine for textile fabric printing |
-
2013
- 2013-09-15 CN CN201320569701.8U patent/CN203632556U/en not_active Expired - Lifetime
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104578891A (en) * | 2014-11-27 | 2015-04-29 | 南通三信塑胶装备科技股份有限公司 | Plasma processing machine for textile fabric printing |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CX01 | Expiry of patent term |
Granted publication date: 20140604 |
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| CX01 | Expiry of patent term |