CN203103953U - Three-phase independent-control voltage unbalance generator - Google Patents
Three-phase independent-control voltage unbalance generator Download PDFInfo
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- CN203103953U CN203103953U CN 201320131158 CN201320131158U CN203103953U CN 203103953 U CN203103953 U CN 203103953U CN 201320131158 CN201320131158 CN 201320131158 CN 201320131158 U CN201320131158 U CN 201320131158U CN 203103953 U CN203103953 U CN 203103953U
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E40/00—Technologies for an efficient electrical power generation, transmission or distribution
- Y02E40/50—Arrangements for eliminating or reducing asymmetry in polyphase networks
Abstract
The utility model discloses a three-phase independent-control voltage unbalance generator, which belongs to the technical field of power electronics. The voltage unbalance generator comprises a normal output circuit, an unbalance output circuit, an isolation transformer, a control circuit and an upper computer, wherein the normal output circuit is composed of a diode H bridge circuit, a power switching device and a protective circuit; the unbalance output circuit structurally comprise a diode H bridge circuit, a power switching device, a protective circuit and a voltage regulator; the control circuit collects input voltages of the voltage unbalance generator and output end voltages of the isolation transformer; human-machine exchange of data is achieved through the upper computer; and according to output voltage requirements, an instruction is sent to the control circuit from the upper computer, and the control circuit outputs trigger signals for switching on or off the power switching devices and drives the normal output circuit and the unbalance output circuit to work so as to realize real-time output of normal voltages or unbalanced voltages. The three-phase independent-control voltage unbalance generator has the beneficial effects that the system structure is optimized, and the cost is lowered; the generator has the characteristics of simple operation, safety, reliability, good real time property and the like; three-phase independent control can be effectively achieved; various unbalanced voltages and instant change of the voltages can be simulated; and the voltage unbalance generator is applicable to testing and research of frequency converters and even motors in experiments under unbalanced voltage conditions.
Description
Technical field
The utility model relates to a kind of voltage control generator, specifically is the Voltage unbalance generator that a kind of three-phase is independently controlled, and belongs to electric and electronic technical field.
Background technology
Development along with microprocessor, power electronic technology and modern control theory, vigorously advocate in country under the background of energy-saving and emission-reduction, power electronic equipment is applied in electric power system and the industrial production on a large scale, as the application of current transformer, active power filter, static passive compensation device etc.In the running of above-mentioned power electronic equipment, the actual electric network energy imbalance often has generation, at this moment, the control strategy that designs under the grid balance condition can make power electronic equipment the irregular operating situation occur, is easy to generate uncharacteristic harmonics, and three-phase current unbalance, loss increase etc., and then the power electronic equipment runnability is descended, when serious power electronic equipment is broken down, even burn out power electronic equipment etc.Therefore, need study operation conditions and the control strategy of power electronic equipment under unbalanced source voltage controlled condition usually, need a kind of Voltage unbalance generator under laboratory condition, to carry out the simulation of unbalanced power supply phenomenon.
At present, the agent structure of conventional Voltage unbalance generator is a current transformer, and the form realization with " AC-DC-AC " costs an arm and a leg, and control is complicated.Usually, when adopting two level PWM current transformers to realize that alternating voltage changes, quantity of power switches is 12, cost is higher, need simultaneously the rectification and the inversion part of current transformer are controlled respectively, control system is comparatively complicated, and any one device for power switching breaks down, directly cause the Voltage unbalance generator can't export reliable three-phase voltage, even can't export the normal voltage of no-voltage energy imbalance.
Summary of the invention
Problem at above-mentioned prior art existence, the Voltage unbalance generator that the utility model provides a kind of three-phase independently to control, the test of the unbalanced experiment of simulation imbalance of three-phase voltage phenomenon, particularly converter device, active power filter, static passive compensation device when being adapted at power electronic equipment test unbalanced experiment.The purpose of this utility model is the deficiency that overcomes existing Voltage unbalance generator, has proposed a kind of new Voltage unbalance generator.The utility model adopts three-phase independently diode H bridge circuit and device for power switching and protective circuit thereof, and simple in structure, used quantity of power switches is few, and cost significantly reduces; Control simultaneously is simple, and real-time performance is good, and can realize the independent control of three-phase voltage, can realize single-phase, the heterogeneous variation of voltage, is a kind of effective and reliable Voltage unbalance generator design.
To achieve these goals, the utility model is achieved through the following technical solutions: the Voltage unbalance generator that a kind of three-phase is independently controlled comprises normal output circuit, uneven output circuit, isolating transformer, control circuit, host computer; The three-phase alternating current input of normal output circuit is connected with three phase network, its three-phase alternating current output links to each other with the input of isolating transformer, behind isolating transformer, export line voltage, the three-phase alternating current input of uneven output circuit is connected with three phase network, and the three-phase alternating current output of uneven output circuit is connected with the input of isolating transformer; The voltage signal of control circuit sampled voltage sensor transmissions, operate the operating state of normal output circuit and uneven output circuit by host computer, control circuit output triggering signal is controlled on-state by normal output circuit and uneven output circuit, changes line voltage.
Normal output circuit comprises three-phase independently diode H bridge circuit and device for power switching and protective circuit thereof.In the single-phase topological structure of the normal output circuit of three-phase, diode H bridge circuit and device for power switching and protective circuit parallel connection thereof; Single-phase diode H bridge circuit is made up of four power diodes; two power diodes (Da1, Da2) series connection and the power diode of connecting (Da3, Da4) parallel connection; form H bridge topological structure; fast recovery diode D1 connects successively with resistance R 1 and capacitor C 1; and, form device for power switching and protective circuit thereof in device for power switching Sa1 two ends.
Uneven output circuit comprises three-phase diode H bridge circuit, device for power switching and protective circuit thereof and the voltage regulator that can independently control, the input of three-phase diode H bridge circuit is the ac input end of uneven output circuit, the output of three-phase diode H bridge circuit links to each other with the input of voltage regulator, and the output of voltage regulator is the ac output end of uneven output circuit; In the single-phase uneven output circuit, diode H bridge circuit and device for power switching and protective circuit parallel connection thereof; Single-phase diode H bridge circuit is made up of four power diodes; two power diodes (D1a, D2a) series connection and the power diode of connecting (D3a, D4a) parallel connection; form H bridge topological structure; fast recovery diode Da connects successively with resistance R a and capacitor C a; be parallel to device for power switching S1a two ends, form device for power switching and protective circuit thereof.
The control of normal output circuit of the utility model and uneven output circuit all realizes by control circuit, in control circuit, voltage sensor collection three-phase alternating current input voltage and three-phase alternating current output voltage input to FPGA/CPLD through the AD sampling A and carry out the logical process conversion, and the information data that obtains passes to dsp processor.Dsp processor is passed host computer with the informix of the on off state of three phase network voltage and power device and through RS232 or the oral instructions of USB knot, and host computer carries out parameter setting according to integrated information to dsp processor.After dsp processor receives setting data; send and open or turn-off instruction; produce the required triggering signal of device for power switching work in device for power switching and the protective circuit thereof through the FPGA/CPLD treatment conversion; triggering signal is converted to the work of light signal power controlling switching device by photoelectric switching circuit, thereby the remote live of realizing Voltage unbalance generator that three-phase independently is controlled is controlled.
The utility model can realize exporting the simulation of line voltage transient change, satisfy the real-time and the feasibility of power electronic equipment control algolithm testing research, simultaneously, select the power diode and the device for power switching of different capacity grade, can satisfy the unbalanced power supply requirement under the different capacity condition.The numerical value of voltage regulator has determined the numerical value of output voltage, and the numerical value of voltage regulator is set, and can export different voltage, has realized the wide region of simulation electrical network unbalance voltage.
The beneficial effects of the utility model are: optimized system configuration, reduced cost, control system is simple and reliable; Can realize the long-range independent control of three-phase voltage, can realize single-phase, the heterogeneous variation of voltage, possess good transient simulation ability; Adopt dsp processor and FPGA/CPLD, control circuit computational accuracy height, processing speed is fast; Introduce opto-electronic conversion, light signal triggers device for power switching, and antijamming capability is strong.The utility model can satisfy power electronic equipment demand to the Voltage unbalance generator when test unbalanced power supply condition adaptability, has vast market and application prospect.
Description of drawings
Fig. 1 is the Voltage unbalance generator schematic diagram that three-phase is independently controlled;
Fig. 2 is normal output circuit structure figure, wherein:
(a) the normal output circuit structure figure of three-phase;
(b) single-phase normal output circuit structure figure;
Fig. 3 is uneven output circuit structure figure, wherein:
(a) three-phase imbalance output circuit structure figure;
(b) single-phase uneven output circuit structure figure;
Fig. 4 is the control circuit structured flowchart;
Among the figure: 1, normal output circuit, 2, uneven output circuit, 3, isolating transformer; 4, control circuit, 5, host computer, 6, diode H bridge circuit; 7, device for power switching and protective circuit thereof, 8, voltage regulator, 9, dsp processor; 10, FPGA/CPLD, 11, the AD sampling A, 12, photoelectric switching circuit; 13, voltage sensor, D1, fast recovery diode, R1, Ra resistance; C1, Ca, electric capacity, Sa1, S1a device for power switching, Da1～Da4, D1a～D4a, power diode.
Embodiment
Below in conjunction with accompanying drawing the utility model is described further.
As shown in Figure 1, the Voltage unbalance generator schematic diagram independently controlled of a kind of three-phase.The utility model comprises normal output circuit 1, uneven output circuit 2, isolating transformer 3, control circuit 4, host computer 5.The three-phase alternating current input of normal output circuit 1 is connected with three phase network, output line voltage after its three-phase alternating current output links to each other with the input of isolating transformer 3, the three-phase alternating current input of uneven output circuit 2 is connected with three phase network, and the three-phase alternating current output of uneven output circuit 2 is connected with the input of isolating transformer 3; The voltage signal of control circuit 4 sampled voltage sensor transmissions, operating state by host computer 5 normal output circuits 1 of decision and uneven output circuit 2, control circuit 4 output triggering signals, on-state by normal output circuit 1 and uneven output circuit 2 come control circuit changes line voltage.
As shown in Figure 2, normal output circuit 1 of the present utility model comprises three-phase independently diode H bridge circuit 6 and device for power switching and protective circuit 7 thereof.In single-phase normal output circuit 1, diode H bridge circuit 6 and device for power switching and protective circuit 7 parallel connections thereof; Single-phase diode H bridge circuit 6 is by four power diode (Da1～Da4) form; two power diodes (Da1, Da2) and the power diode of connecting (Da3, Da4) parallel connection of series connection; form H bridge topological structure; fast recovery diode D1 connects successively with resistance R 1 and capacitor C 1; and, form device for power switching and protective circuit 7 thereof in device for power switching Sa1 two ends.
As shown in Figure 3; uneven output circuit 2 of the present utility model comprises three-phase independently diode H bridge circuit 6, device for power switching and protective circuit 7 thereof and voltage regulator 8; the input of three-phase diode H bridge circuit 6 is the ac input end of uneven output circuit 2; the output of three-phase diode H bridge circuit 6 links to each other with the input of voltage regulator 8, and the output of voltage regulator 8 is the ac output end of uneven output circuit 2.In single-phase uneven output circuit 2, diode H bridge circuit 6 and device for power switching and protective circuit 7 parallel connections thereof; Single-phase diode H bridge circuit 6 is by four power diode (D1a～D4a) form; two power diodes (D1a, D2a) and the power diode of connecting (D3a, D4a) parallel connection of series connection; form H bridge topological structure; fast recovery diode Da connects successively with resistance R a and capacitor C a; be parallel to device for power switching S1a two ends, form device for power switching and protective circuit 7 thereof.
As shown in Figure 4, the structured flowchart of control circuit 4.Control circuit 4 of the present utility model is by dsp processor 9, and FPGA/CPLD 10, AD sampling A 11, and photoelectric switching circuit 12, voltage sensor 13 are formed; Voltage sensor 13 collection three-phase alternating current input voltages and three-phase alternating current output voltage input to FPGA/CPLD 10 through AD sampling A 11 and carry out the logical process conversion, and the information data that obtains passes to dsp processor 9; Dsp processor 9 sends opens or turn-offs instruction, produce the required triggering signal of device for power switching work in device for power switching and the protective circuit 7 thereof through FPGA/CPLD 10 treatment conversion, triggering signal is converted to the work of light signal power controlling switching device by photoelectric switching circuit 12; Dsp processor 9 is passed host computer 5 with the informix of the on off state of three phase network voltage and power device through RS232 or the oral instructions of USB knot, host computer 5 carries out parameter setting according to integrated information to dsp processor 9, and realization is controlled the remote live of the Voltage unbalance generator that three-phase is independently controlled.
Concrete implementing procedure of the present utility model is as follows: at first operating personnel regulate voltage regulator 8 in the uneven output circuit 2 according to the required voltage unbalance information, afterwards by the normal output voltage control command of host computer 5 inputs, after dsp processor 9 in the control circuit 4 receives control command, produce control signal, FPGA/CPLD 10 handles control signal and produces the drive signal that drives device for power switching in the normal output circuit 1, drive signal is converted to light signal through photoelectric switching circuit 12 and triggers the device for power switching conducting, exports normal three-phase alternating voltage; Produce unbalance voltage constantly at needs, operating personnel are by the relevant control command of host computer input, after dsp processor 9 receives control command in the control circuit 4, produce control signal, FPGA/CPLD 10 handle to produce drives control signal the drive signal of related power switching device conducting in the shutoff of device for power switching in the normal output circuit 1 and the uneven output circuit 2, drive signal is converted to light signal through photoelectric switching circuit 12 and triggers device for power switching shutoff and conducting, exports unbalanced three-phase alternating voltage; In above process, voltage sensor 13 is gathered the three-phase alternating voltage information of input and output in real time, is transferred to host computer 5 after control circuit 4 is handled, and is convenient to operating personnel and observes judgement.
Claims (5)
1. the Voltage unbalance generator that three-phase is independently controlled is characterized in that comprising normal output circuit (1), uneven output circuit (2), isolating transformer (3), control circuit (4), host computer (5); Normal output circuit (1) is by three-phase diode H bridge circuit (6) and device for power switching and protective circuit (7) formation thereof, uneven output circuit (2) comprises three-phase diode H bridge circuit (6), device for power switching and protective circuit thereof (7) and voltage regulator (8) constitute, the three-phase alternating current input of normal output circuit (1) is connected with three phase network, output line voltage after its three-phase alternating current output links to each other with the input of isolating transformer (3), the three-phase alternating current input of uneven output circuit (2) is connected with three phase network, and the three-phase alternating current output of uneven output circuit (2) is connected with the input of isolating transformer (3); The voltage signal of control circuit (4) sampled voltage sensor transmissions, determine the operating state of normal output circuit (1) and uneven output circuit (2) by host computer (5), control circuit (4) output triggering signal, control the on-state of voltage regulator by normal output circuit (1) and uneven output circuit (2), change line voltage.
2. the Voltage unbalance generator that a kind of three-phase according to claim 1 is independently controlled, it is characterized in that, described normal output circuit (1) comprises three-phase diode H bridge circuit (6) and device for power switching and the protective circuit (7) thereof that can independently control, in the single-phase normal output circuit (1), diode H bridge circuit (6) and device for power switching and protective circuit (7) parallel connection thereof; Single-phase diode H bridge circuit (6) is made up of four power diodes; two power diodes (Da1, Da2) series connection back and the power diode of connecting (Da3, Da4) parallel connection; form H bridge topological structure; fast recovery diode D1 connects successively with resistance R 1 and capacitor C 1; and, form device for power switching and protective circuit (7) thereof in device for power switching Sa1 two ends.
3. the Voltage unbalance generator that a kind of three-phase according to claim 2 is independently controlled, it is characterized in that, the input of three-phase diode H bridge circuit (6) is the ac input end of normal output circuit (1) in the described normal output circuit (1), and three-phase diode H bridge circuit (6) output is the ac output end of normal output circuit (1).
4. the Voltage unbalance generator that a kind of three-phase according to claim 1 is independently controlled, it is characterized in that, described uneven output circuit (2) comprises the three-phase diode H bridge circuit (6) that can independently control, device for power switching and protective circuit thereof (7) and voltage regulator (8), the input of three-phase diode H bridge circuit (6) is the ac input end of uneven output circuit (2), the output of three-phase diode H bridge circuit (6) links to each other with the input of voltage regulator (8), and the output of voltage regulator (8) is the ac output end of uneven output circuit (2); In the single-phase uneven output circuit (2), diode H bridge circuit (6) and device for power switching and protective circuit (7) parallel connection thereof; Single-phase diode H bridge circuit (6) is made up of four power diodes; two power diodes (D1a, D2a) series connection back and the power diode of connecting (D3a, D4a) parallel connection; form H bridge topological structure; fast recovery diode Da connects successively with resistance R a and capacitor C a; and, form device for power switching and protective circuit (7) thereof in device for power switching S1a two ends.
5. the Voltage unbalance generator that a kind of three-phase according to claim 1 is independently controlled, it is characterized in that described control circuit (4) is by dsp processor (9), FPGA/CPLD (10), AD sampling A (11), photoelectric switching circuit (12), voltage sensor (13) are formed; Voltage sensor (13) collection three-phase alternating current input voltage and three-phase alternating current output voltage input to FPGA/CPLD (10) through AD sampling A (11) and carry out the logical process conversion, and the information data that obtains passes to dsp processor (9); Dsp processor (9) sends opens or turn-offs instruction, produce the required triggering signal of device for power switching work in device for power switching and the protective circuit (7) thereof through FPGA/CPLD (10) treatment conversion, triggering signal is converted to the work of light signal power controlling switching device by photoelectric switching circuit (12); Dsp processor (9) is passed host computer (5) with the informix of the on off state of three phase network voltage and power device through RS232 or the oral instructions of USB knot, host computer (5) carries out parameter setting according to integrated information to dsp processor (9), and realization is controlled the remote live of the Voltage unbalance generator that three-phase is independently controlled.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201320131158 CN203103953U (en) | 2013-03-21 | 2013-03-21 | Three-phase independent-control voltage unbalance generator |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201320131158 CN203103953U (en) | 2013-03-21 | 2013-03-21 | Three-phase independent-control voltage unbalance generator |
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| CN203103953U true CN203103953U (en) | 2013-07-31 |
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| CN 201320131158 Expired - Fee Related CN203103953U (en) | 2013-03-21 | 2013-03-21 | Three-phase independent-control voltage unbalance generator |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106451467A (en) * | 2016-10-25 | 2017-02-22 | 三尔梯(泉州)电气制造有限公司 | Three-phase full-automatic voltage-stabilizing electric energy restorer and restoration method |
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2013
- 2013-03-21 CN CN 201320131158 patent/CN203103953U/en not_active Expired - Fee Related
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106451467A (en) * | 2016-10-25 | 2017-02-22 | 三尔梯(泉州)电气制造有限公司 | Three-phase full-automatic voltage-stabilizing electric energy restorer and restoration method |
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| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C17 | Cessation of patent right | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20130731 Termination date: 20140321 |