CN201805271U - UPS (uninterruptible power supply) device - Google Patents
UPS (uninterruptible power supply) device Download PDFInfo
- Publication number
- CN201805271U CN201805271U CN2010201767380U CN201020176738U CN201805271U CN 201805271 U CN201805271 U CN 201805271U CN 2010201767380 U CN2010201767380 U CN 2010201767380U CN 201020176738 U CN201020176738 U CN 201020176738U CN 201805271 U CN201805271 U CN 201805271U
- Authority
- CN
- China
- Prior art keywords
- rectifier
- charger
- current
- signal
- current signal
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired - Fee Related
Links
Images
Classifications
-
- 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
- Y02B—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO BUILDINGS, e.g. HOUSING, HOUSE APPLIANCES OR RELATED END-USER APPLICATIONS
- Y02B70/00—Technologies for an efficient end-user side electric power management and consumption
- Y02B70/10—Technologies improving the efficiency by using switched-mode power supplies [SMPS], i.e. efficient power electronics conversion e.g. power factor correction or reduction of losses in power supplies or efficient standby modes
Abstract
An UPS device at least includes a rectifier, a charger, a first current sensor, a second current sensor, an adder link, and a rectifier controller. The charger and the rectifier are connected in parallel; the first current sensor detects the current signal input by the rectifier, and the second current sensor detects the current signal input by the charger; the adder link adds the current signal input by the rectifier and the current signal input by the charger; and the rectifier adopts a double-ring structure, which includes an outer voltage ring and an inner current ring, wherein the feedback signal of the inner current ring is the sum of the current signal input by the rectifier and the current signal input by the charger.
Description
Technical field
The utility model relates to a kind of uninterrupted power supply(ups) (Uninterruptable Power Supply), the uninterrupted power supply of the harmonic current that the rectifier circuit Active Compensation charger (Charger) of especially a kind of employing band capability correction (Power Factor Correction) function is produced.
Background technology
Uninterrupted power supply(ups) (Uninterruptible Power Supply, UPS) be a kind of power-supply device, this power-supply device is from power storage elements such as charged pools, at electric main just often, provide the energy by electric main, electric main is carried out filtering, rectification, actions such as conversion, for power consumption equipment provides clean power supply supply, in case outage appears in civil power, voltage is on the low side, during power supply quality problem such as the higher or frequency fluctuation of voltage, uninterrupted power supply(ups) can detect the generation of mains supply quality problem fast, and switch to powered battery, with energy process conversion stored in the battery, for power consumption equipment provides reliable and stable power supply supply, having solved the civil power that will face when power consumption equipment is directly received the mains-supplied circuit interrupts, have and disturb or unstable institute causes the power consumption equipment can't operate as normal, even problem such as damage.The modern life is based upon on the electrified basis, and the reliability of power supply is just particularly important, so UPS is widely used.
Typical case's uninterrupted power supply(ups), be connected on exchange input comprise rectifier and charger, the line construction of rectifier and charger and working method have determined the input power and the Harmonics of Input distortion performance of uninterrupted power supply(ups).In recent years, more and more pay attention to the power pollution problem in the world, various international organizations all propose corresponding laws and regulations requirement to the power factor (PF) and the input current distortion of equipment, in the uninterrupted power supply industry, as IEC61000-3-2, standards such as IEC61000-3-4 are proposing requirement for restriction to the UPS device aspect power factor and the Harmonics of Input.Typical charger construction front end is not for controlling rectified half-waves or full-wave rectifier, cause the Harmonics of Input distortion bigger, at the bottom of the input power factor, can't satisfy the requirement of power supply quality rules, in order to satisfy the rules demand, have the UPS manufacturer often to adopt the main power circuit in band power factor school and the charger of band power factor, but the subject matter that this method exists is to be with the charger cost of Active PFC function higher.
Please refer to Fig. 1, Fig. 1 has disclosed a kind of functional block diagram of existing typical uninterrupted power supply (ups) Unity, comprising rectifier (AC/DC) 101, charger (Charger) 102, storage battery (Battery) 103, DC booster (DC/DC) 104, dc bus (BUS) 107, dc-link capacitance (BUS CAP) 105, inverter (DC/AC) 106, AC input terminal 109, ac output end 110, bypass (Bypass) 108, master controller (Controller) 100.Wherein AC input terminal 109 connects the electric main input, rectifier 101 and charger 102 also are connected in ac input end 109, charger 102 outputs connect battery, battery 103 connects the charger 102 outer DC booster 104 that are connected to simultaneously, the output of rectifier 101 and DC booster 104 connects dc bus 107, also and be connected to dc-link capacitance 105, inverter 106 is received on the dc bus 107 on the dc bus 107.The input of bypass 108 connects ac input end 109, its output is connected with the output-parallel of inverter 106, and be connected to ac output end 110, each the functional block work of master controller 100 control entire machine, be that controller is from each functional block monitoring running status, and, the monitoring program of central processing unit (CPU) operation whole system is arranged on the controller to each functional block output control command signal.Current sensor 111 detects the rectifier input current signal, and feeds back to master controller 100.Wherein work as the mains input voltage, frequency, parameters such as waveform are in normal condition, rectifier 101 is accepted AC energy from AC input terminal 109, and be converted to direct current energy and deliver to dc bus 107, bus capacitor 105 on the dc bus 107 plays stored energy, suppress the effect of ripple, inverter 106 is accepted direct current energy from dc bus 107 and is converted to interchange output supply load (other power consumption equipments), because being galvanic currents, the input of inverter 106 presses, and its working method, state is subjected to master controller 100 controls fully, so no matter the quality of input civil power how, parameters such as the waveform of its inverter 106 outputs and frequency all can be controlled relatively goodly; When electric main interrupts, master controller 100 can detect the civil power interrupt event in a short period of time, close rectifier, and start DC booster 104 and convert energy stored in the storage battery 103 to more high-tension direct voltage and deliver to dc bus 107, continuation is transformed into by inverter 106 and exchanges the use of output supply load, from civil power interrupt detecting interrupt starting DC booster 106 during this period of time in, because dc-link capacitance 105 has been saved certain quantity of energy, can guarantee that in a period of time DC bus-bar voltage maintains in the scope of permission, so there is not the external energy output inverter can obtain energy during this period of time by dc-link capacitance 105 yet, guarantee output, realize that thus outside civil power interrupts, and export unbroken basic function.And as at electric main by supply, but on its electric main interference is arranged, or problem such as mains waveform distortion, after rectifier 101 is transformed into direct current, inversion output is no longer included influence, the former load that is connected on the lead-out terminal 110 also can not be imported the influence of interference, has promptly realized improving the effect of power supply quality.The effect of bypass 108 then is at rectifier 101 or inverter 106, or stepup transformer 104 homenergic converters provide the path that the civil power supply load is directly arranged when chance failure occurring, improves the reliability of whole system as far as possible.
Wherein rectifier 101 is connected on the AC network, in order to reduce input current harmonics, reduces the interference to power supply.Be usually designed to and have power factor correction (Power Factor Correction) function, specific implementation please refer to Fig. 1 and Fig. 2, Fig. 2 is the controller architecture figure of rectifier 101 parts among the uninterrupted power supply(ups) UPS shown in Figure 1, this structure is outer voltage and current inner loop twin nuclei, among Fig. 2, signal V_Bus_Ref is the DC bus-bar voltage desired value, V_Bus is dc bus 107 virtual voltage values of feedback, Vac is the ac commercial power voltage signal, Is is a rectifier input current feedback signal, in this control system wherein Vac electric main signal square obtain mains waveform signal V_ws divided by the effective value Vrms of this electric main, DC bus-bar voltage desired value and dc bus virtual voltage are relatively, its difference is proofreaied and correct through Voltage loop controller link 202, Voltage loop controller link 202 can be a proportional integral type adjuster, and mains waveform signal V_ws and 202 outputs of Voltage loop controller link are got along by product link 203 and taken advantage of the given signal Imo that obtains electric current loop.The given signal Imo of electric current compares with rectifier input current feedback signal Is, and difference is proofreaied and correct through current loop controller 204, and current loop control link 204 can be a proportional integral type adjuster.The output of current loop controller 204 enters a pulse-width modulation (PWM Pulse Width Modulation) modulation link, Vs compares with carrier signal, obtain a series of fixed-frequency by the effective or low effective logic of height, the PWM_Signal signal of change in duty cycle, the PWM_Signal signal is delivered to rectifier drive circuit, through isolating, amplify and just can drive in the rectifier switching tube and open and turn-off, realize stable DC busbar voltage of rectifier 101 outputs, and make the rectifier input current waveform identical with the line voltage shape, promptly realize the purpose that input power factor is proofreaied and correct.Wherein, in the controller of rectifier 101, extract the place of mains waveform V_ws, also can change sinusoidal signal of artificial directly structure into, as shown in Figure 3.Each several part is corresponding among other parts of Fig. 3 and Fig. 2, and its operating state is just no longer repeated here.The controller of rectifier can be to be realized by hardware circuit, also can be realized by the processor on the master controller 100 (CPU) working procedure.
Above-described system realized the Active PFC of rectifier, yet charger also will realize identical Active PFC function, and visible system is a more complicated, therefore raises the cost of charger.
In view of this, it is low to be necessary to provide a kind of better scheme to solve above-mentioned existing apparatus input power factor, current distortion degree height, or expensive problem.
The utility model content
Technical problem to be solved in the utility model provides a kind of improved uninterrupted power supply(ups).
The utility model is that the technical scheme that technical solution adopts is: a kind of uninterrupted power supply(ups) is provided, and it comprises:
Rectifier;
Charger, this charger and this rectifier are connected in parallel;
First current sensor is used to detect this rectifier input current signal;
Second current sensor is used to detect this charger input current signal;
The adder link is used to add and this rectifier input current signal and this charger input current signal; And
Rectifier controller, this rectifier are twin nuclei, and comprising the Voltage loop and the internal current ring of outside, wherein: the current inner loop feedback signal adds the charger input current signal for this rectifier input current signal.
The utility model is that the technical scheme that technical solution adopts is: a kind of uninterrupted power supply(ups) is provided, and it comprises:
Rectifier;
Charger, this charger and this rectifier are connected in parallel;
Current sensor is used to detect this rectifier summation input current signal in parallel with this charger; And
Rectifier controller, this rectifier are twin nuclei, and comprising the Voltage loop and the internal current ring of outside, wherein: the current inner loop feedback signal is this rectifier and the input current signal of this charger summation in parallel.
The utility model is that the technical scheme that technical solution adopts is: a kind of uninterrupted power supply(ups) is provided, and it comprises:
Rectifier;
Charger, this charger and this rectifier are connected in parallel;
Current sensor is used to detect this rectifier summation input current signal in parallel with this charger;
Rectifier controller, rectifier adopts twin nuclei, comprises outside Voltage loop and internal current ring;
A structure current signal, this structure current signal shape is identical or approaching with this charger input current signal shape;
Wherein, the Voltage loop output signal cuts the given signal of this structure current signal as current inner loop.
The beneficial effects of the utility model are, charger does not need to have the active power factor correction function, can guarantee that also complete machine has input power factor characteristic preferably, the lower Harmonics of Input distortion factor, thereby charger can adopt better simply line construction, therefore realizes the cost of charger and complete machine and the optimization of performance.
Description of drawings
Below in conjunction with drawings and Examples the utility model is further specified, in the accompanying drawing:
Fig. 1 prior art typical case UPS structured flowchart
A kind of rectifier controller structure chart of Fig. 2
The another kind of rectifier controller structure chart of Fig. 3
Fig. 4 a kind of UPS structured flowchart of the present utility model
Fig. 5 rectifier controller control structure of the present utility model figure
A kind of specific implementation of adder link 413 among Fig. 6 Fig. 4
Fig. 7 the utility model the 2nd embodiment, no PFC charger are connected on rectifier input current transducer back
Fig. 8 a kind of UPS structure chart of realizing complete machine input power factor calibration function of the present utility model
Fig. 9 the utility model the 3rd embodiment adds the rectifier controller structure chart that the manual construction charging is flowed
Embodiment
Please refer to Fig. 4, Fig. 4 has disclosed a kind of specific embodiment of the utility model, comprising rectifier (AC/DC) 401, charger (Charger) 402, storage battery (Battery) 403, DC booster (DC/DC) 404, dc bus (BUS) 407, dc-link capacitance (BUS CAP) 405, inverter (DC/AC) 406, AC input terminal 409, ac output end 410, bypass (Bypass) 408, master controller (Controller) 400.Wherein AC input terminal 409 connects the electric main input, rectifier 401 and charger 402 also are connected in ac input end 409, charger 402 outputs connect battery, battery 403 connects the charger 402 outer DC booster 404 that are connected to simultaneously, the output of rectifier 401 and DC booster 404 connects dc bus 407, also and be connected to dc-link capacitance 405, inverter 106 is received on the dc bus 107 on the dc bus 407.The input of bypass 408 connects ac input end 409, its output is connected with the output-parallel of inverter 406, and be connected to ac output end 410, each the functional block work of master controller 400 control entire machine, be that controller is from each functional block monitoring running status, and, the monitoring program of central processing unit (CPU) operation whole system is arranged on the controller to each functional block output control command signal.Current sensor 411 detects the rectifier input current signal, and feeds back to master controller 400.Wherein work as the mains input voltage, frequency, parameters such as waveform are in normal condition, rectifier 401 is accepted AC energy from AC input terminal 409, and be converted to direct current energy and deliver to dc bus 407, bus capacitor 405 on the dc bus 407 plays stored energy, suppress the effect of ripple, inverter 406 is accepted direct current energy from dc bus 407 and is converted to interchange output supply load (other power consumption equipments), because being galvanic currents, the input of inverter 406 presses, and its working method, state is subjected to master controller 400 controls fully, so no matter the quality of input civil power how, parameters such as the waveform of its inverter 406 outputs and frequency all can be controlled relatively goodly; When electric main interrupts, master controller 400 can detect the civil power interrupt event in a short period of time, close rectifier, and start DC booster 404 and convert energy stored in the storage battery 403 to more high-tension direct voltage and deliver to dc bus 407, continuation is transformed into by inverter 406 and exchanges the use of output supply load, from civil power interrupt detecting interrupt starting DC booster 406 during this period of time in, because dc-link capacitance 405 has been saved certain quantity of energy, can guarantee that in a period of time DC bus-bar voltage maintains in the scope of permission, so there is not the external energy output inverter can obtain energy during this period of time by dc-link capacitance 405 yet, guarantee output, realize that thus outside civil power interrupts, and export unbroken basic function.And as at electric main by supply, but on its electric main interference is arranged, or problem such as mains waveform distortion, after rectifier 401 is transformed into direct current, inversion output is no longer included influence, the former load that is connected on the lead-out terminal 410 also can not be imported the influence of interference, has promptly realized improving the effect of power supply quality.The effect of bypass 408 then is at rectifier 401 or inverter 406, or stepup transformer 404 homenergic converters provide the path that the civil power supply load is directly arranged when chance failure occurring, improves the reliability of whole system as far as possible.
Wherein rectifier 401 is connected on the AC network, in order to reduce input current harmonics, reduces the interference to power supply.Be usually designed to and have power factor correction (Power Factor Correction) function, specific implementation please refer to Fig. 5, Fig. 5 is the controller architecture figure of rectifier 401 parts among the uninterrupted power supply(ups) UPS shown in Figure 4, this structure is outer voltage and current inner loop twin nuclei, among Fig. 5, signal V_Bus_Ref is the DC bus-bar voltage desired value, V_Bus is dc bus 507 virtual voltage values of feedback, Vac is the ac commercial power voltage signal, Is is a rectifier input current feedback signal, in this control system wherein Vac electric main signal square obtain mains waveform signal V_ws divided by the effective value Vrms of this electric main, DC bus-bar voltage desired value and dc bus virtual voltage are relatively, its difference is proofreaied and correct through Voltage loop controller link 502, wherein Voltage loop controller link 502 can be a proportional integral type adjuster, mains waveform signal V_ws and 502 outputs of Voltage loop controller link are got along by product link 503 and are taken advantage of the given signal Iac that obtains electric current loop, the given signal Iac of electric current compares with current feedback signal, difference is proofreaied and correct through current loop controller 504, and current loop control link 504 can be a proportional integral type adjuster.The output of current loop controller 504 enters a pulse-width modulation (PWM Pulse Width Modulation) modulation link, Vs compares with carrier signal, obtain a series of fixed-frequency by the effective or low effective logic determines of height, the PWM_Signal signal of change in duty cycle, the PWM_Signal signal is delivered to rectifier drive circuit, through isolating, amplify and just can drive in the rectifier switching tube and open and turn-off, realize stable DC busbar voltage of rectifier 401 outputs, and make the rectifier input current waveform identical with the line voltage shape, promptly realize the purpose that input power factor is proofreaied and correct.Wherein, in the controller of rectifier 401, extract the place of mains waveform V_ws, also can change sinusoidal signal of artificial directly structure into.The controller of rectifier can be to be realized by hardware circuit, also can be realized by the processor on the master controller 400 (CPU) working procedure.
Difference from prior art is: in the utility model, charger 402 itself does not need to possess power factor emendation function, so its input current I_chg, by charger line architecture and output voltage, operational mode determines that independently be not subjected to the influence of rectifier 401, waveform is the non-sine shape.
The utility model embodiment comprises current sensor 411 and current sensor 411, wherein current sensor 411 detects rectifier input current signal I_rec, current sensor 412 detects charger input current I_chg, current sensor 411, current sensor 412 detects the result in 413 additions of adder link, and adder link 413 output current signals feed back to master controller 400.Adder link 413 can be realized that Fig. 6 provides a kind of operational amplifier realization add circuit that has by adder operation circuit or program.The control structure of the power factor correction rectification of rectifier controller of the present utility model and aforementioned typical is constant, as Fig. 5, because the current signal of charger is added, the given signal of electric current that is equivalent to rectifier has reduced by a big or small composition as the charger input current of shape, because the rectifier controller current loop controller makes the rectifier input current have the function of following the trail of the given signal Imo of electric current, therefore, the given signal Iac of sine-shaped electric current that is obtained by the output of Voltage loop controller 502 and mains waveform V_ws product cuts charger input current I_chg and forms the given signal Imo of final rectifier input current, make and just occur a just in time anti-phase waveform on the rectifier input current waveform with the charger input current, because total input current of whole uninterrupted power supply UPS equals rectifier input current and the addition of charger input current, so the complete machine input current then forms sinusoidal shape, reach the purpose of overall power factor correcting.
Another embodiment as schematically shown in Figure 7, self is not connected on rectifier input current transducer 711 back with the charger 702 of Active PFC function, and transducer 711 detects the electric current that feeds back to controller 700 and equals the rectifier input current and add the charger input current like this.It is equivalent feeding back to master controller 400 with transducer 412 outputs by 413 additions of add operation link with transducer 411 output among Fig. 4 again.So under principle of uniformity, the complete machine input current also can realize following the trail of input voltage, reaches the function of complete machine power factor.
Another specific embodiment structure of the utility model, as Fig. 8, shown in Figure 9, compared to Figure 1, charger 802 itself does not possess the Active PFC function equally.Sensing station does not need change yet, only need be in the rectifier controller of Digital Realization shown in Figure 9 a charger input current waveform of manual construction I_chg_con, from extracting the identical given signal Imo of electric current with mains waveform of link product gained, Voltage loop controller and mains waveform reduce, wherein this manual construction charger input current waveform signal I_chg_con can be according to machine actual waveform of testing under typical work condition, establishment waveform form, during operation according to reading waveform signal time phase.Also can adopt approximately linear formula analog waveform, the mode of employing formula operation in service is constructed the charger waveform.
Above with reference to description of drawings various preferred embodiments of the present utility model; but only otherwise deviate from essence of the present utility model and scope; those skilled in the art can carry out modifications and changes on the various forms to it, all belongs to protection range of the present utility model.
Claims (3)
1. uninterrupted power supply(ups) comprises:
Rectifier;
Charger, this charger and this rectifier are connected in parallel;
First current sensor is used to detect this rectifier input current signal;
Second current sensor is used to detect this charger input current signal;
The adder link is used to add and this rectifier input current signal and this charger input current signal; And
Rectifier controller, this rectifier are twin nuclei, and comprising the Voltage loop and the internal current ring of outside, it is characterized in that: the current inner loop feedback signal adds the charger input current signal for this rectifier input current signal.
2. uninterrupted power supply(ups) comprises:
Rectifier;
Charger, this charger and this rectifier are connected in parallel;
Current sensor is used to detect this rectifier summation input current signal in parallel with this charger; And
Rectifier controller, this rectifier are twin nuclei, and Voltage loop and internal current ring comprising the outside is characterized in that: the current inner loop feedback signal is the input current signal of this rectifier with this charger summation in parallel.
3. uninterrupted power supply(ups) comprises:
Rectifier;
Charger, this charger and this rectifier are connected in parallel;
Current sensor is used to detect this rectifier summation input current signal in parallel with this charger;
Rectifier controller, rectifier adopts twin nuclei, comprises outside Voltage loop and internal current ring;
A structure current signal, this structure current signal shape is identical or approaching with this charger input current signal shape;
It is characterized in that: the Voltage loop output signal cuts the given signal of this structure current signal as current inner loop.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2010201767380U CN201805271U (en) | 2010-04-03 | 2010-04-03 | UPS (uninterruptible power supply) device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2010201767380U CN201805271U (en) | 2010-04-03 | 2010-04-03 | UPS (uninterruptible power supply) device |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN201805271U true CN201805271U (en) | 2011-04-20 |
Family
ID=43874772
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2010201767380U Expired - Fee Related CN201805271U (en) | 2010-04-03 | 2010-04-03 | UPS (uninterruptible power supply) device |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN201805271U (en) |
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102290850A (en) * | 2011-08-31 | 2011-12-21 | 昆明理工大学 | Solar energy and wind energy complementary emergency power-supply system for fishing boat |
| CN102412732A (en) * | 2010-04-03 | 2012-04-11 | 联正电子(深圳)有限公司 | Uninterrupted power supply device and control method thereof |
| CN102447403A (en) * | 2011-11-09 | 2012-05-09 | 北京工业大学 | Three-phase rectifier circuit with low harmonic wave continuous input current |
| CN106169804A (en) * | 2015-05-18 | 2016-11-30 | Abb 技术有限公司 | There is the uninterruptible power system of fault clearance ability |
| CN109412255A (en) * | 2018-10-22 | 2019-03-01 | 宁波三星智能电气有限公司 | A kind of double loop power supply switching circuit of low-loss high reliability |
-
2010
- 2010-04-03 CN CN2010201767380U patent/CN201805271U/en not_active Expired - Fee Related
Cited By (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102412732A (en) * | 2010-04-03 | 2012-04-11 | 联正电子(深圳)有限公司 | Uninterrupted power supply device and control method thereof |
| CN102290850A (en) * | 2011-08-31 | 2011-12-21 | 昆明理工大学 | Solar energy and wind energy complementary emergency power-supply system for fishing boat |
| CN102447403A (en) * | 2011-11-09 | 2012-05-09 | 北京工业大学 | Three-phase rectifier circuit with low harmonic wave continuous input current |
| CN102447403B (en) * | 2011-11-09 | 2014-02-26 | 北京工业大学 | Three-phase rectifier circuit with low harmonic wave continuous input current |
| CN106169804A (en) * | 2015-05-18 | 2016-11-30 | Abb 技术有限公司 | There is the uninterruptible power system of fault clearance ability |
| CN106169804B (en) * | 2015-05-18 | 2021-01-12 | Abb瑞士股份有限公司 | Uninterruptible power supply system with fault clearing capability |
| CN109412255A (en) * | 2018-10-22 | 2019-03-01 | 宁波三星智能电气有限公司 | A kind of double loop power supply switching circuit of low-loss high reliability |
| CN109412255B (en) * | 2018-10-22 | 2021-11-19 | 宁波三星智能电气有限公司 | Low-loss high-reliability double-circuit power supply switching circuit |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN102412732A (en) | Uninterrupted power supply device and control method thereof | |
| CN103427430B (en) | A kind of energy management method of mixed energy storage system in microgrid | |
| CN102005817B (en) | Uninterruptible power supply device based on microgrid and dispatching control method thereof | |
| CN205248805U (en) | Novel DVR voltage compensation device | |
| CN102468682A (en) | High voltage direct current power supply system for both alternating current purpose and direct current purpose | |
| CN107579591B (en) | Backup power system powered by alternating current power supply | |
| CN201805271U (en) | UPS (uninterruptible power supply) device | |
| CN102082495A (en) | Power supply unit provided with ac/dc input voltage detection and power supply system incorporating same | |
| CN103023344A (en) | Universal smart grid power electronic device | |
| CN217739415U (en) | Storage-feed type battery charge-discharge test system based on Internet of things | |
| CN104600775A (en) | Storage battery activation grid-connected discharging device | |
| CN110970928A (en) | Energy storage off-grid inverter with photovoltaic and commercial power simultaneously complementarily powered and control method | |
| CN105449830A (en) | DC600V train power supply system | |
| CN101521393A (en) | On-line uninterrupted power supply device | |
| KR101267803B1 (en) | Commercial grade system interconnected pcs for interface between two grids | |
| CN204167914U (en) | A kind of energy back feed device and marine generator stress test system | |
| CN103036437B (en) | Distribution network terminal power supply device | |
| CN102255356B (en) | Efficient uninterruptible power supply | |
| CN203243277U (en) | Three-phase 220V alternating current motor drive device using 110V alternating current | |
| CN201839195U (en) | AC-DC dual-purpose high-voltage DC power supply system | |
| CN112421659A (en) | Energy storage dilatation power | |
| CN205583829U (en) | On line type UPS system based on DSP | |
| CN102223136A (en) | Non-energy-storing motor-driven system for complementary power supply of wind power generation and electrical network | |
| CN101572413B (en) | Low-voltage line voltage compensating device and compensating method thereof | |
| CN201975789U (en) | Harmonic current canceling module and module group |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| 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: 20110420 Termination date: 20120403 |