CN1523727A - AC-DC-AC power network parallel operation rotary inverter - Google Patents
AC-DC-AC power network parallel operation rotary inverter Download PDFInfo
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- CN1523727A CN1523727A CNA031339298A CN03133929A CN1523727A CN 1523727 A CN1523727 A CN 1523727A CN A031339298 A CNA031339298 A CN A031339298A CN 03133929 A CN03133929 A CN 03133929A CN 1523727 A CN1523727 A CN 1523727A
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Abstract
This invention relates to a generation system parallel to national network and providing it same frequency powers characterizing that the rotating inversion power supply is composed of a rectifier system, a central control system, a DC motor, a drive system and a three-phase AC synchronous generator, the rectify system is connected with the central control system connected with the DC connected with the generator by the drive system, the national network linked with the rectify system is connected with the central control system to be connected with output of a three phase AC synchronous generator.
Description
One, technical field: the invention belongs to power supply unit, particularly relate to a kind of electricity generation system that can be incorporated into the power networks in national grid, the electric power of same frequency can be provided for national grid.
Two, background technology
At present, domestic and international market large generating system electric power inverter is the electronic component formula mostly, transformer element formula, or electric power inverter such as frequency conversion type, and its complex structure electric elements rapid wear, a little less than the anti-surge power, on the high side.As ultra-large type (more than the MW class KW) grid-connected system, often because frequency plot difference causes heavy losses for the whole generating system.At present, also because large-scale inverter price is too high, make many regenerative resource penetrations and promotions such as wind power generation be subjected to serious obstruction.In recent years, China had set up several in succession and had incorporated the wind energy turbine set of national grid into.The wind power equipment main frame substantially all is external import.External wind power equipment mainly adopts mode such as mechanical speed change to solve electric field and synchronized operation problem.This and net mode requires steel that high load capacity is arranged, because the gear ratio of gear box can be above 50 times.If keep windmill and synchronized, then need to overcome the accident that wind speed variation and electric network fault etc. occur.Because fan blade gear box and motor cannot stand the short-circuit impact of moment, cause device damage or influence useful life, therefore, China also is being in " tackling key problem " stage aspect the Large-scale Wind Turbines manufacturing, and the wind power equipment production domesticization is zero starting still.
Three, summary of the invention: the invention provides a kind of friendship and hand over grid type rotation inverter always, its purpose is to solve electricity generation system and the national grid frequency and the Phase synchronization problem of isolated operation, and existing design complicated, power consumption is big, the technical problem of aspects such as failure rate height.
The present invention is achieved through the following technical solutions:
A kind of friendship one is handed over grid type rotation inverter always, it is characterized in that: this rotation inverter is mainly by commutation system, central control system, DC motor, drive system and three-phase synchronous AC generator are formed, commutation system is connected with central control system by lead, central control system is connected with DC motor by lead, DC motor is connected with three-phase synchronous AC generator by drive system, the national grid that is connected with commutation system is connected with central control system by lead, and the output of three-phase synchronous AC generator is connected with central control system by lead.
Between commutation system and central control system, also be provided with batteries, be connected with commutation system, central control system by lead.
Central control system mainly contains pulse width modulation apparatus, sampling apparatus, frequency and Phase Processing device and forms; Be connected with pulse width modulation apparatus by lead by commutation system, the output of pulse width modulation apparatus is connected with DC motor, and another output of pulse width modulation apparatus is connected with the Phase Processing device; The output of three-phase synchronous AC generator is connected with batteries in the central control system, and batteries is connected with the Phase Processing device; National grid is connected with sampling apparatus in the central control system, and the output of sampling apparatus is connected with the Phase Processing device; The Phase Processing device is handled the back and is connected with pulse width modulation apparatus.
Also be provided with protection system in the central control system, it mainly is made up of protective device and driving brake apparatus; The input end is connected with protective device, and the other end of protective device connects the driving brake apparatus, and the other end that drives brake apparatus is connected with DC motor.
Pulse width modulation apparatus in the central control system is connected with display; Sampling apparatus is connected with display; Sampling apparatus is connected with display.
Commutation system is connected to three-phase full wave rectifier circuit in the commutation system for the alternating voltage by generating set output, and three-phase full wave rectifier circuit connects in the voltage stabilizing ballast device again, and the voltage stabilizing ballast device is connected with switching device shifter; Be connected with the voltage stabilizing ballast device with the three-phase half wave retifier in the commutation system that national grid is connected, the voltage stabilizing ballast device is connected with switching device shifter; The output of switching device shifter is connected with batteries with central control system.
A kind of grid type rotation inverter provided by the invention has simple in structure, multiple functional, stable performance, high efficiency, lower-price characteristic.Its extensive use can improve the comprehensive result of use of generating equipment, reduces cost, and promotes home-made equipment processes such as wind-powered electricity generation.
Advantage of the present invention and effect:
1), exportable 220V and 380V standard sine wave.
2), simple in structure, multiple functional, stable performance, high efficiency.Can guarantee long-term failure-free operation.
3), cheap.The price that is equivalent to conventional inverter 1/10th.Be used for large-scale lower with ultra-large type electricity generation system cost.
4), the present invention uses in super-huge (more than the MW class KW) grid-connected system, when electricity generation system generating frequency plot is asynchronous with the mains frequency phase place of being incorporated into, after inversion of the present invention, with the mains frequency Phase synchronization, thereby avoid electricity generation system to break down, can avoid causing heavy economic losses on the one hand.Can improve the large-scale wind powered generation syst overall efficiency on the one hand.
The scope of application: the present invention can be widely used in wind generator system, solar power system, and little hydroelectric system, thermal power generation system etc., the present invention is particularly suitable for wind generator system.
Four, description of drawings:
Accompanying drawing 1 is primary structure schematic diagram of the present invention;
Accompanying drawing 3 is the annexation schematic diagram of commutation system of the present invention;
Accompanying drawing 4 is the annexation schematic diagram of central control system of the present invention.
Five, execution mode:
Described grid type rotation inverter operation principle: shown in accompanying drawing 1,2, hand over always and one hand over rotation inverter (grid type), central control system 4, batteries 8 mainly by commutation system 3, DC motor 5, three-phase synchronous AC generator 6 grades are partly formed.Its main feature is to control DC motor 5 by central control system 4, and drives the Generation Control structure of three-phase synchronous AC generator 6 rotations.Central control system 4 is mainly finished the PwM pulse-width modulation, form controlled direct voltage drive DC motor rotation, and the voltage that generator 6 is sent and the voltage of national grid 1 carry out the adjustment of frequency and phase place, so that send the standard three-phase alternating voltage with the national grid synchronised, be incorporated into the power networks with national grid or directly traction load.Promptly by the alternating voltage 2 of wind turbine generator other generating equipments that work alone such as (or) solar battery group output, insert commutation system 3 and carry out three phase full wave rectification, direct voltage after the rectification enters central control system 4, after the PWM pulse-width modulation, form controlled direct voltage and insert DC motor 5, make its rotation and drive three-phase synchronous AC generator 6 rotations, send three-phase alternating voltage.The voltage of voltage that generator 6 sends and national grid 1 all inserts central control system 4, carry out the adjustment of frequency and phase place, control the rotation parameter of DC motor 5, make three-phase synchronous AC generator 6 send standard three-phase alternating voltage with national grid 1 synchronised.
As shown in Figure 3: the connected mode of commutation system 3 and operation principle: by the alternating voltage of wind turbine generator 1 other generating equipments that work alone such as (or) solar battery group output, insert three-phase full wave rectifier circuit 22, become direct current after the rectification, insert voltage stabilizing ballast device 23 again, obtain more stably that direct voltage enters switching device shifter 24, be sent to central control system 4 and batteries 8 by output 26.Display 25 shows voltage, the current value of output, input.
Net electric alternating voltage by the state that national grid 1 is sent here, insert three-phase half wave retifier 29, become direct current after the rectification, insert voltage stabilizing ballast device 28 again, obtaining more stably, direct voltage enters switching device shifter 24.The effect of switching device shifter 24 is, works as service equipment, or during handling failure, back-up sources such as incision national grid and batteries provide when safeguarding and use; It carries out floating charge by 30 pairs of batteries of output 8 at ordinary times, cooling fan 27 these system's large power semiconductor devices of cooling.
As shown in Figure 4: the connected mode of central control system 4 and operation principle:
The direct voltage of sending here by commutation system 3, be sent to PwM pulse width modulation apparatus 10 through input 31 and carry out automatic pulse-width modulation, export controlled direct voltage and go to drive DC motor 5 runnings through output 20 outputs, DC motor 5 drives three-phase synchronous AC generator 6 rotations again, send three-phase alternating voltage and national grid and be incorporated into the power networks or directly drive loaded work piece, instrument 21 shows the operating voltage and the operating current of DC motor 5.The alternating voltage 19 that three-phase synchronous AC generator 6 sends enters sampling apparatus 12, detects frequency and phase signal one route instrument 13 shows, and one the tunnel is sent to frequency and Phase Processing device 11; Standard frequency and the phase signal sent here by national grid 1 enter sampling apparatus 15, one route instrument 18 shows, one the tunnel also is sent to frequency and Phase Processing device 11, this two paths of signals is sent to pulse width modulation apparatus 10 again after frequency and 11 processing of Phase Processing device, go to adjust pulse duration, make three-phase synchronous AC generator 6 send standard three-phase voltage with national grid 1 synchronised.Protective device 17 detects and removes to drive brake apparatus I4 behind the fault-signal and make equipment downtime, and mark 16 is the input end.
Claims (6)
1. a friendship one is handed over grid type rotation inverter always, it is characterized in that: this rotation inverter is mainly by commutation system (3), central control system (4), DC motor (5), drive system (7) and three-phase synchronous AC generator (6) are formed, commutation system (3) is connected with central control system (4) by lead, central control system (4) is connected with DC motor (5) by lead, DC motor (5) is connected with three-phase synchronous AC generator (6) by drive system (7), the national grid (1) that is connected with commutation system (3) is connected with central control system (4) by lead, and the output (19) of three-phase synchronous AC generator (6) is connected with central control system (4) by lead.
2. a kind of friendship according to claim 1 one is handed over grid type rotation inverter always, it is characterized in that: between commutation system (3) and central control system (4), also be provided with batteries (8), be connected with commutation system (3), central control system (4) by lead.
3. a kind of friendship according to claim 1 one is handed over grid type rotation inverter always, and it is characterized in that: central control system (4) mainly contains pulse width modulation apparatus (10), sampling apparatus (12), (15), and frequency and Phase Processing device (11) are formed; Be connected with pulse width modulation apparatus (10) by lead by commutation system (3), the output (20) of pulse width modulation apparatus (10) is connected with DC motor (5), and another output of pulse width modulation apparatus is connected with Phase Processing device (11); The output of three-phase synchronous AC generator (6) is connected with sampling apparatus (12) in the central control system (4), and sampling apparatus (12) is connected with Phase Processing device (11); National grid (1) is connected with sampling apparatus (15) in the central control system (4), and the output of sampling apparatus (15) is connected with Phase Processing device (11); Phase Processing device (11) is handled the back and is connected with pulse width modulation apparatus (10).
4. a kind of friendship according to claim 1 one is handed over grid type rotation inverter always, and it is characterized in that: central control system also is provided with protection system in (4), and it mainly is made up of protective device (17) and driving brake apparatus (14); Input end (16) is connected with protective device (17), and the other end of protective device (17) connects driving brake apparatus (14), and the other end that drives brake apparatus (17) is connected with DC motor (5).
5. a kind of friendship according to claim 1 one is handed over grid type rotation inverter always, and it is characterized in that: the pulse width modulation apparatus (10) in the central control system (4) is connected with display (21); Sampling apparatus (12) is connected with display (13); Sampling apparatus (15) is connected with display (18).
6. a kind of friendship according to claim 1 one is handed over grid type rotation inverter always, it is characterized in that: commutation system (3) is connected to three-phase full wave rectifier circuit (22) in the commutation system (3) for the alternating voltage (2) by generating set output, three-phase full wave rectifier circuit (22) is connected with voltage stabilizing ballast device (23) again, and voltage stabilizing ballast device (23) is connected with switching device shifter (24); Be connected with voltage stabilizing ballast device (28) with the three-phase half wave retifier (29) in the commutation system (3) that national grid (1) is connected, voltage stabilizing ballast device (28) is connected with switching device shifter (24); The output (26) of switching device shifter (24) is connected with batteries (8) with central control system (4).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNA031339298A CN1523727A (en) | 2003-09-09 | 2003-09-09 | AC-DC-AC power network parallel operation rotary inverter |
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| Application Number | Priority Date | Filing Date | Title |
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| CNA031339298A CN1523727A (en) | 2003-09-09 | 2003-09-09 | AC-DC-AC power network parallel operation rotary inverter |
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| CN1523727A true CN1523727A (en) | 2004-08-25 |
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| CNA031339298A Pending CN1523727A (en) | 2003-09-09 | 2003-09-09 | AC-DC-AC power network parallel operation rotary inverter |
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN100440719C (en) * | 2005-07-27 | 2008-12-03 | 株式会社日立制作所 | Power generation apparatus using AC energization synchronous generator and method of controlling the same |
| CN100553100C (en) * | 2006-12-11 | 2009-10-21 | 富士电机系统株式会社 | Convertor device |
| CN102386634A (en) * | 2011-11-28 | 2012-03-21 | 余建岳 | Harmonic-interference-free re-generation grid-connection device driven by low-voltage DC |
| CN103687787A (en) * | 2011-07-18 | 2014-03-26 | Abb股份有限公司 | A power system for a vessel |
-
2003
- 2003-09-09 CN CNA031339298A patent/CN1523727A/en active Pending
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN100440719C (en) * | 2005-07-27 | 2008-12-03 | 株式会社日立制作所 | Power generation apparatus using AC energization synchronous generator and method of controlling the same |
| CN100553100C (en) * | 2006-12-11 | 2009-10-21 | 富士电机系统株式会社 | Convertor device |
| CN103687787A (en) * | 2011-07-18 | 2014-03-26 | Abb股份有限公司 | A power system for a vessel |
| CN102386634A (en) * | 2011-11-28 | 2012-03-21 | 余建岳 | Harmonic-interference-free re-generation grid-connection device driven by low-voltage DC |
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