CN103501044A - Three-phase four-wire uninterrupted power supply device with function of active filter - Google Patents
Three-phase four-wire uninterrupted power supply device with function of active filter Download PDFInfo
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- CN103501044A CN103501044A CN201310485454.8A CN201310485454A CN103501044A CN 103501044 A CN103501044 A CN 103501044A CN 201310485454 A CN201310485454 A CN 201310485454A CN 103501044 A CN103501044 A CN 103501044A
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Abstract
The invention relates to a three-phase four-wire uninterrupted power supply device with a function of an active filter, which belongs to the technical field of multifunctional uninterrupted power supply devices. The three-phase four-wire uninterrupted power supply device aims to solve the problems that a reactive component, a harmonic component and an unbalanced component which are generated by a user electric load cannot be compensated during normal power supply of a power grid and pollution to the power grid due to grid-connected current of the components cannot be eliminated by the existing device. The three-phase four-wire uninterrupted power supply device comprises the power grid, the user electric load, a storage battery, a direct current voltage stabilizing circuit, a three-phase four-wire inverter, a digital signal processing control unit, a circuit breaker, a first detector and a second detector, wherein the first detector is used for detecting the output phase current of the alternating-current side of the three-phase four-wire inverter and the input voltage and current of the user electric load, and the second detector is used for detecting the output voltage and current of the storage battery. The three-phase four-wire uninterrupted power supply device is used for three-phase four-wire uninterrupted power supply devices in computer systems, aviation management systems, satellite systems and systems for precise instruments, scientific research, hospitals, banks, insurance and the like.
Description
Technical field
The present invention relates to a kind of three-phase and four-line uninterrupted power supply(ups) that has the active filter function concurrently, belong to multi-functional uninterrupted power supply(ups) technical field.
Background technology
At present, known three-phase and four-line uninterrupted power supply(ups) is comprised of batteries, three-phase inverter, Industrial Frequency Transformer, output filter circuit, control system and corresponding protection.Along with the fast development in every profession and trade, each field has proposed more and more higher requirement to power supply quality, especially the important system that real-time is very strong, important department and important power consumption equipment need the support of uninterrupted power supply to the requirement of power supply quality, the three-phase and four-line uninterrupted power supply(ups) is widely used in the systems such as computer system, air management system, satellite system, precision instrument, scientific research, hospital, bank, insurance.The three-phase inverter of three-phase and four-line uninterrupted power supply(ups) has the function of energy transmitted in both directions, and when the power supply grid normal power supply, inverter works in the rectification charging state, the charging of accumulators group.In the situation that the power supply grid outage, the three-phase and four-line uninterrupted power supply(ups) is load supplying, and inverter works in inverter mode, and the direct current of batteries is transformed into to alternating current, and the sinusoidal ac of 50Hz is provided to power consumption equipment.
But by various machinery equipments in electric loading, come into operation in large quantities, electric energy is drawn in dissimilar user power utilization load from electrical network, and user power utilization load meeting inevitably produces idle component, harmonic component and unbalanced component.General three-phase and four-line uninterrupted power supply(ups) is when the rectification charging state, and idle component, harmonic component and the unbalanced component that can't produce the user power utilization load compensate, and can pollute public electric wire net with the grid-connected current of these components.
Summary of the invention
The present invention seeks to compensate in order to solve idle component, harmonic component and the unbalanced component that existing apparatus can not produce the user power utilization load when the electrical network normal power supply, can not eliminate the pollution problem of the grid-connected current of these components to electrical network, a kind of three-phase and four-line uninterrupted power supply(ups) that has the active filter function concurrently is provided.
The three-phase and four-line uninterrupted power supply(ups) that has the active filter function concurrently of the present invention, it comprises electrical network, the user power utilization load, batteries, direct current regulation circuit, three-phase four-line dc-to-ac converter, the Digital Signal Processing control unit, circuit breaker, the first detector and the second detector, the DC voltage output end of batteries is connected with the DC voltage input end of direct current regulation circuit, the DC voltage output end of direct current regulation circuit is connected with the DC voltage input end of three-phase four-line dc-to-ac converter, the three-phase voltage output of the AC of three-phase four-line dc-to-ac converter accesses electrical network by circuit breaker, the DC power supply changeover control signal output of Digital Signal Processing control unit is connected with the DC power supply changeover control signal input of direct current regulation circuit, the pwm control signal output of Digital Signal Processing control unit is connected with the pwm control signal input of three-phase four-line dc-to-ac converter, the first detector is for detection of the output current phase of three-phase four-line dc-to-ac converter AC and input voltage and the electric current of user power utilization load, the testing result signal output part of the first detector is connected with the first testing result signal input part of Digital Signal Processing control unit, the second detector is for detection of output voltage and the electric current of batteries, the testing result signal output part of the second detector is connected with the second testing result signal input part of Digital Signal Processing control unit.
Advantage of the present invention: the three-phase and four-line uninterrupted power supply(ups) that has the active filter function concurrently of the present invention is in the situation that grid cut-off, for the sinusoidal ac of 50Hz is provided by electric loading.And when the power supply grid normal power supply, this device has the active filter function concurrently in rectification charging, reactive power, harmonic component and three-phase imbalance component that compensation is introduced due to the user power utilization load, realization be connected to the grid electric current be with the voltage of electrical network with unity power factor sine wave in phase frequently, eliminated the pollution of grid-connected current to electrical network.
The accompanying drawing explanation
Fig. 1 is the structural representation that has the three-phase and four-line uninterrupted power supply(ups) of active filter function concurrently of the present invention;
Fig. 2 is the structural representation of three-phase four-line dc-to-ac converter of the present invention;
Fig. 3 is the operation principle schematic diagram of Digital Signal Processing control unit of the present invention.
Embodiment
Embodiment one: present embodiment is described below in conjunction with Fig. 1, the described three-phase and four-line uninterrupted power supply(ups) that has the active filter function concurrently of present embodiment, it comprises electrical network 101, user power utilization load 102, batteries 103, direct current regulation circuit 104, three-phase four-line dc-to-ac converter 105, Digital Signal Processing control unit 106, circuit breaker 108, the first detector 107 and the second detector 109, the DC voltage output end of batteries 103 is connected with the DC voltage input end of direct current regulation circuit 104, the DC voltage output end of direct current regulation circuit 104 is connected with the DC voltage input end of three-phase four-line dc-to-ac converter 105, the three-phase voltage output of the AC of three-phase four-line dc-to-ac converter 105 is by circuit breaker 108 access electrical networks 101, the DC power supply changeover control signal output of Digital Signal Processing control unit 106 is connected with the DC power supply changeover control signal input of direct current regulation circuit 104, the pwm control signal output of Digital Signal Processing control unit 106 is connected with the pwm control signal input of three-phase four-line dc-to-ac converter 105, the first detector 107 is for detection of the output current phase of three-phase four-line dc-to-ac converter 105 ACs and input voltage and the electric current of user power utilization load 102, the testing result signal output part of the first detector 107 is connected with the first testing result signal input part of Digital Signal Processing control unit 106, the second detector 109 is for detection of output voltage and the electric current of batteries 103, the testing result signal output part of the second detector 109 is connected with the second testing result signal input part of Digital Signal Processing control unit 106.
Embodiment two: present embodiment is described below in conjunction with Fig. 2, present embodiment is described further execution mode one, described three-phase four-line dc-to-ac converter 105 comprises DC bus capacitor 201, four bridge arm voltage source current transformers 202, drive circuit 203, LC type filtering output circuit 206, LC type filtering output circuit 206 comprises four filtering output circuit inductance 204 and four filtering output circuit electric capacity 205, four brachium pontis of four bridge arm voltage source current transformers 202 are comprised of four couples of full-control type power device IGBT, the emitter of the first full-control type power device IGBT of each brachium pontis is connected with an end of a filtering output circuit inductance 204 with the collector electrode of the second full-control type power device IGBT simultaneously, the other end of each filtering output circuit inductance 204 is connected with an end of a filtering output circuit electric capacity 205 respectively, another termination the earth of each filtering output circuit electric capacity 205, the DC voltage input end parallel connection direct lateral capacitance 201 of three-phase four-line dc-to-ac converter 105, the one end while of DC bus capacitor 201 is connected with the collector electrode of the first full-control type power device IGBT of each brachium pontis, the other end while of DC bus capacitor 201 is connected with the emitter of the second full-control type power device IGBT of each brachium pontis, the pwm control signal output of Digital Signal Processing control unit 106 is connected with the pwm control signal input of drive circuit 203, four groups of drive circuit 203 drive signal output parts to be connected with the control signal input of four brachium pontis of four bridge arm voltage source current transformers 202 respectively.
Embodiment three: present embodiment is described below in conjunction with Fig. 2, present embodiment is described further execution mode two, four groups of described drive circuit 203 drive in signal, every group drives signal to have two to drive signal, is connected with the base stage of two full-control type power device IGBT that form a brachium pontis respectively.
Embodiment four: below in conjunction with Fig. 1, present embodiment is described, present embodiment is described further execution mode one, and described Digital Signal Processing control unit 106 adopts 2812 type digital signal processors of TI company to realize.
Embodiment five: present embodiment is described below in conjunction with Fig. 3, present embodiment is described further execution mode one, described Digital Signal Processing control unit 106 comprises batteries monitoring diagnostic module 301, have the grid-connected control module 302 of active filter function concurrently, grid-connected current is followed the tracks of control module 303 and protection control module 304, the voltage and current of batteries 103 outputs that batteries monitoring diagnostic module 301 reception the second detectors 109 detect, the instantaneous output output of the batteries 103 of batteries monitoring diagnostic module 301 is connected with the instantaneous output input of the batteries 103 of the grid-connected control module 302 that has the active filter function concurrently, the grid-connected control module 302 that has the active filter function concurrently receives 4 road voltage and currents of user power utilization load 102 outputs that the first detectors 107 detect, the grid-connected current that has the grid-connected control module 302 of active filter function concurrently is connected with reference to the output current input with the grid-connected current of grid-connected current tracking control module 303 with reference to the output current output, the electric current of three-phase four-line dc-to-ac converter 105 outputs that grid-connected current tracking control module 303 reception the first detectors 107 detect, the first receiving terminal of protection control module 304 receives the voltage and current of batteries 103 outputs that the second detector 109 detects, the second receiving terminal of protection control module 304 receives 4 road voltage and currents of user power utilization load 102 outputs that the first detector 107 detects, the 3rd receiving terminal of protection control module 304 receives the electric current of three-phase four-line dc-to-ac converter 105 outputs that the first detector 107 detects, the protection stopping signal input that the protection stopping signal output of protection control module 304 is followed the tracks of control module 303 with grid-connected current is connected, the DC power supply changeover control signal output of batteries monitoring diagnostic module 301 is connected with the DC power supply changeover control signal input of direct current regulation circuit 104, the pwm control signal output that grid-connected current is followed the tracks of control module 303 is connected with the pwm control signal input of three-phase four-line dc-to-ac converter 105.
Claims (5)
1. have the three-phase and four-line uninterrupted power supply(ups) of active filter function concurrently, it is characterized in that: it comprises electrical network (101), user power utilization load (102), batteries (103), direct current regulation circuit (104), three-phase four-line dc-to-ac converter (105), Digital Signal Processing control unit (106), circuit breaker (108), the first detector (107) and the second detector (109), the DC voltage output end of batteries (103) is connected with the DC voltage input end of direct current regulation circuit (104), the DC voltage output end of direct current regulation circuit (104) is connected with the DC voltage input end of three-phase four-line dc-to-ac converter (105), the three-phase voltage output of the AC of three-phase four-line dc-to-ac converter (105) is by circuit breaker (108) access electrical network (101), the DC power supply changeover control signal output of Digital Signal Processing control unit (106) is connected with the DC power supply changeover control signal input of direct current regulation circuit (104), the pwm control signal output of Digital Signal Processing control unit (106) is connected with the pwm control signal input of three-phase four-line dc-to-ac converter (105), the first detector (107) is for detection of the output current phase of three-phase four-line dc-to-ac converter (105) AC and input voltage and the electric current of user power utilization load (102), the testing result signal output part of the first detector (107) is connected with the first testing result signal input part of Digital Signal Processing control unit (106), the second detector (109) is for detection of output voltage and the electric current of batteries (103), the testing result signal output part of the second detector (109) is connected with the second testing result signal input part of Digital Signal Processing control unit (106).
2. the three-phase and four-line uninterrupted power supply(ups) that has the active filter function concurrently according to claim 1, it is characterized in that: described three-phase four-line dc-to-ac converter (105) comprises DC bus capacitor (201), four bridge arm voltage source current transformers (202), drive circuit (203), LC type filtering output circuit (206), LC type filtering output circuit (206) comprises four filtering output circuit inductance (204) and four filtering output circuit electric capacity (205), four brachium pontis of four bridge arm voltage source current transformers (202) are comprised of four couples of full-control type power device IGBT, the emitter of the first full-control type power device IGBT of each brachium pontis is connected with an end of a filtering output circuit inductance (204) with the collector electrode of the second full-control type power device IGBT simultaneously, the other end of each filtering output circuit inductance (204) is connected with an end of a filtering output circuit electric capacity (205) respectively, another termination the earth of each filtering output circuit electric capacity (205), the DC voltage input end parallel connection direct lateral capacitance (201) of three-phase four-line dc-to-ac converter (105), the one end while of DC bus capacitor (201) is connected with the collector electrode of the first full-control type power device IGBT of each brachium pontis, the other end while of DC bus capacitor (201) is connected with the emitter of the second full-control type power device IGBT of each brachium pontis, the pwm control signal output of Digital Signal Processing control unit (106) is connected with the pwm control signal input of drive circuit (203), four groups of drive circuit (203) drive signal output parts to be connected with the control signal input of four brachium pontis of four bridge arm voltage source current transformers (202) respectively.
3. the three-phase and four-line uninterrupted power supply(ups) that has the active filter function concurrently according to claim 2, it is characterized in that: four groups of described drive circuit (203) drive in signal, every group drives signal to have two to drive signal, is connected with the base stage of two full-control type power device IGBT that form a brachium pontis respectively.
4. the three-phase and four-line uninterrupted power supply(ups) that has the active filter function concurrently according to claim 1, is characterized in that: 2812 type digital signal processors realizations of described Digital Signal Processing control unit (106) employing TI company.
5. the three-phase and four-line uninterrupted power supply(ups) that has the active filter function concurrently according to claim 1, it is characterized in that: described Digital Signal Processing control unit (106) comprises batteries monitoring diagnostic module (301), have the grid-connected control module (302) of active filter function concurrently, grid-connected current is followed the tracks of control module (303) and protection control module (304), batteries monitoring diagnostic module (301) receives the voltage and current of batteries (103) output that the second detector (109) detects, the instantaneous output output of the batteries (103) of batteries monitoring diagnostic module (301) is connected with the instantaneous output input of the batteries (103) of the grid-connected control module (302) that has the active filter function concurrently, the grid-connected control module (302) that has the active filter function concurrently receives 4 road voltage and currents of user power utilization load (102) output that the first detector (107) detects, the grid-connected current that has the grid-connected control module (302) of active filter function concurrently is connected with reference to the output current input with the grid-connected current of grid-connected current tracking control module (303) with reference to the output current output, grid-connected current is followed the tracks of the electric current that control module (303) receives three-phase four-line dc-to-ac converter (105) output that the first detector (107) detects, the first receiving terminal of protection control module (304) receives the voltage and current of batteries (103) output that the second detector (109) detects, the second receiving terminal of protection control module (304) receives 4 road voltage and currents of user power utilization load (102) output that the first detector (107) detects, the 3rd receiving terminal of protection control module (304) receives the electric current of three-phase four-line dc-to-ac converter (105) output that the first detector (107) detects, the protection stopping signal output of protection control module (304) is connected with the protection stopping signal input that grid-connected current is followed the tracks of control module (303), the DC power supply changeover control signal output of batteries monitoring diagnostic module (301) is connected with the DC power supply changeover control signal input of direct current regulation circuit (104), the pwm control signal output that grid-connected current is followed the tracks of control module (303) is connected with the pwm control signal input of three-phase four-line dc-to-ac converter (105).
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| CN201310485454.8A CN103501044A (en) | 2013-10-16 | 2013-10-16 | Three-phase four-wire uninterrupted power supply device with function of active filter |
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| CN201310485454.8A CN103501044A (en) | 2013-10-16 | 2013-10-16 | Three-phase four-wire uninterrupted power supply device with function of active filter |
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Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN104578162A (en) * | 2015-01-22 | 2015-04-29 | 东南大学 | Three-phase four-bridge-arm active power filter gird-connected interface and parameter design method |
| CN106159951A (en) * | 2016-07-28 | 2016-11-23 | 青岛创统科技发展有限公司 | A kind of composite power source with emergency power supply and active power filtering function |
| RU2624921C1 (en) * | 2016-07-12 | 2017-07-11 | федеральное государственное казенное военное образовательное учреждение высшего образования "Военная академия связи имени Маршала Советского Союза С.М. Буденного" Министерства обороны Российской Федерации | Automatic reserve switching device |
| CN109193711A (en) * | 2018-11-01 | 2019-01-11 | 山东鲁能智能技术有限公司 | A kind of imbalance compensation system and method for resisting voltage distortion |
| RU2692085C1 (en) * | 2018-05-08 | 2019-06-21 | Федеральное государственное казенное военное образовательное учреждение высшего образования "Военная академия Ракетных войск стратегического назначения имени Петра Великого" МО РФ | Device for automatic switching of backup |
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| US20050253564A1 (en) * | 2002-07-19 | 2005-11-17 | Se-Wan Choi | Active power filter apparatus with reduced va rating for neutral current suppression |
| CN102412609A (en) * | 2011-11-30 | 2012-04-11 | 徐州中矿大传动与自动化有限公司 | Power inverter with functions of UPS (uninterrupted power supply) and active power filter |
| CN102593868A (en) * | 2012-02-29 | 2012-07-18 | 黑龙江省电力科学研究院 | Distributed three-phase four-wire photovoltaic grid-connected device with electric energy adjusting function |
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| US20050253564A1 (en) * | 2002-07-19 | 2005-11-17 | Se-Wan Choi | Active power filter apparatus with reduced va rating for neutral current suppression |
| CN102412609A (en) * | 2011-11-30 | 2012-04-11 | 徐州中矿大传动与自动化有限公司 | Power inverter with functions of UPS (uninterrupted power supply) and active power filter |
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Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104578162A (en) * | 2015-01-22 | 2015-04-29 | 东南大学 | Three-phase four-bridge-arm active power filter gird-connected interface and parameter design method |
| CN104578162B (en) * | 2015-01-22 | 2016-08-17 | 东南大学 | A kind of three-phase four-arm Active Power Filter-APF network interface and Parameters design |
| RU2624921C1 (en) * | 2016-07-12 | 2017-07-11 | федеральное государственное казенное военное образовательное учреждение высшего образования "Военная академия связи имени Маршала Советского Союза С.М. Буденного" Министерства обороны Российской Федерации | Automatic reserve switching device |
| CN106159951A (en) * | 2016-07-28 | 2016-11-23 | 青岛创统科技发展有限公司 | A kind of composite power source with emergency power supply and active power filtering function |
| RU2692085C1 (en) * | 2018-05-08 | 2019-06-21 | Федеральное государственное казенное военное образовательное учреждение высшего образования "Военная академия Ракетных войск стратегического назначения имени Петра Великого" МО РФ | Device for automatic switching of backup |
| CN109193711A (en) * | 2018-11-01 | 2019-01-11 | 山东鲁能智能技术有限公司 | A kind of imbalance compensation system and method for resisting voltage distortion |
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Application publication date: 20140108 |