CN107248780A - DC UPS system and its optimized calculation method based on ultracapacitor - Google Patents
DC UPS system and its optimized calculation method based on ultracapacitor Download PDFInfo
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- CN107248780A CN107248780A CN201710490994.3A CN201710490994A CN107248780A CN 107248780 A CN107248780 A CN 107248780A CN 201710490994 A CN201710490994 A CN 201710490994A CN 107248780 A CN107248780 A CN 107248780A
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- Prior art keywords
- ultracapacitor
- energy storage
- controlled switch
- controller
- way gate
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Classifications
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02J—CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
- H02J9/00—Circuit arrangements for emergency or stand-by power supply, e.g. for emergency lighting
- H02J9/04—Circuit arrangements for emergency or stand-by power supply, e.g. for emergency lighting in which the distribution system is disconnected from the normal source and connected to a standby source
- H02J9/06—Circuit arrangements for emergency or stand-by power supply, e.g. for emergency lighting in which the distribution system is disconnected from the normal source and connected to a standby source with automatic change-over, e.g. UPS systems
-
- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02J—CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
- H02J7/00—Circuit arrangements for charging or depolarising batteries or for supplying loads from batteries
- H02J7/34—Parallel operation in networks using both storage and other dc sources, e.g. providing buffering
- H02J7/345—Parallel operation in networks using both storage and other dc sources, e.g. providing buffering using capacitors as storage or buffering devices
-
- 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
- Y02B70/30—Systems integrating technologies related to power network operation and communication or information technologies for improving the carbon footprint of the management of residential or tertiary loads, i.e. smart grids as climate change mitigation technology in the buildings sector, including also the last stages of power distribution and the control, monitoring or operating management systems at local level
-
- 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
- Y04—INFORMATION OR COMMUNICATION TECHNOLOGIES HAVING AN IMPACT ON OTHER TECHNOLOGY AREAS
- Y04S—SYSTEMS INTEGRATING TECHNOLOGIES RELATED TO POWER NETWORK OPERATION, COMMUNICATION OR INFORMATION TECHNOLOGIES FOR IMPROVING THE ELECTRICAL POWER GENERATION, TRANSMISSION, DISTRIBUTION, MANAGEMENT OR USAGE, i.e. SMART GRIDS
- Y04S20/00—Management or operation of end-user stationary applications or the last stages of power distribution; Controlling, monitoring or operating thereof
- Y04S20/20—End-user application control systems
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- Engineering & Computer Science (AREA)
- Power Engineering (AREA)
- Business, Economics & Management (AREA)
- Emergency Management (AREA)
- Stand-By Power Supply Arrangements (AREA)
Abstract
The present invention relates to a kind of intelligent DC uninterruptible power system based on ultracapacitor energy storage and its optimized calculation method, it is characterised in that：Including EMI filter circuit, AC/DC rectifiers, converter, two-way gate-controlled switch, ultracapacitor SC, controller and expansible communication interface.The present invention has that storage energy is big, charging rate fast, service life cycle length, high power density, good ultralow temperature characteristics and many advantages, such as environmental protection, is more suitably applied to need instantaneously to provide powerful distribution power automation terminal.
Description
Technical field
The invention belongs to distribution power automation terminal technical field, the intelligent DC for being related to distribution power automation terminal is uninterruptedly electric
Source, especially a kind of DC UPS system and its optimized calculation method based on ultracapacitor.
Background technology
The operational reliability of power distribution automation station institute terminal, line feed terminals and distribution transformer terminals directly influences power distribution automation
The operational reliability of system.From the point of view of conventional experience, the supporting power supply of terminal is to cause on-site terminal to damage or go out extremely
The one of the main reasons of existing failure.Therefore, we must be fully understood by and pay much attention to the supporting power supply of terminal.Existing distribution
There is the problem of service life is short and difficult in maintenance in automatization terminal intelligent DC uninterrupted power source.
The content of the invention
It is an object of the invention to overcome the deficiencies of the prior art and provide a kind of based on the DC uninterrupted of ultracapacitor
Power-supply system and its optimized calculation method, can solve the problem that making for existing distribution power automation terminal intelligent DC uninterrupted power source power supply
With short life and it is difficult in maintenance the problem of.
The present invention solves its technical problem and takes following technical scheme to realize：
A kind of intelligent DC uninterruptible power system based on ultracapacitor energy storage, including EMI filter circuit, AC/DC
Rectifier, converter, two-way gate-controlled switch, ultracapacitor SC and controller；
Input single-phase exchange is exported to AC/DC rectifiers through EMI filter circuit, the output end of the AC/DC rectifiers with
Converter is connected, after converter carries out voltage stabilizing, current limliting and filtering, and stable voltage is exported to distribution power automation terminal；
The input of the controller is connected with AC/DC rectifiers, for detecting that single phase ac is after AC/DC rectifications
No dead electricity；The output end of the controller is connected with the two-way gate-controlled switch, for sending response control to two-way gate-controlled switch
Information processed；The two-way gate-controlled switch is connected with the ultracapacitor SC, and the two-way gate-controlled switch is believed according to control is received
Breath, completes conducting state conversion, realizes ultracapacitor SC charge and discharge State Transferrings；The output end of the AC/DC rectifiers is led to
Cross two-way gate-controlled switch with the ultracapacitor SC to be connected, when single phase ac is powered, ultracapacitor SC is carried out permanent
Ductility limit pressure charging；Ultracapacitor SC is connected by two-way gate-controlled switch and converter with the input of distribution power automation terminal
Connect, when single phase ac dead electricity, for being powered for distribution power automation terminal.
Moreover, the two-way gate-controlled switch and ultracapacitor SC output end are connected with the input of controller respectively
Connect, for gathering the working condition of uninterruptible power system and super capacitor SC charge and discharge state；The controller also with
Communication interface can be expanded to be connected, super capacitor SC charge and discharge state and the work feelings of DC UPS system are realized
Condition signal transporting function, realizes that dispatching terminal carries out monitoring and remote control in real time.
Moreover, the controller is also connected with expansible human-computer interaction interface, the human-computer interaction interface is usually to grasp
The touch-screen of work, the field monitoring to DC UPS, field control and warning function can be realized by visual touch-screen.
Moreover, the optimized calculation method of the minimum of the super capacitor SC is：
Step 1, the remaining energy storage ratio for calculating ultracapacitor SC, and draw remaining energy storage ratio ξ and normalized electricity
Hold voltage relationship figure；
Step 2, the remaining energy storage ratio ξ according to step 1 and normalized capacitance voltage graph of a relation, determine ultracapacitor
SC minimum.
Moreover, the remaining energy storage ratio ξ of the step 1 computational methods are：Assuming that before electric discharge, SC initial voltage is
UM, minimum effectively operating voltage is Umin, then the energy W=0.5CU stored according to electric capacity2It can obtain, what is thereby resulted in is not available
Remaining energy storage WSWith its primary power WMThe ratio between, i.e. residue energy storage ratio ξ is：
Moreover, the optimized calculation method of the capacity of the super capacitor SC is：
Assuming that in DC uninterrupted Switching Power Supply, SC needs the power provided to be P after dead electricityo, the conversion effect of converter
Rate is η, it is necessary to which the time maintained is TW, then after dead electricity, the energy that SC should be provided is：
Because the available energy of SC isAccording to the conservation of energy, W1=W2, draw
Advantages and positive effects of the present invention are：
1st, the present invention is used as the problems of intelligent DC uninterrupted power source of energy-storage travelling wave tube for super capacitor, proposes
A kind of optimization method for the intelligent DC uninterrupted power source that super capacitor energy-storage utilization rate is effectively lifted by additional converter, and
It is applied in distribution power automation terminal unit, so as to improve the stability and reliability of electrical power distribution automatization system.
2nd, the present invention reduces the operating voltage of ultracapacitor using additional converter, so as to improve ultracapacitor energy storage
Utilization rate, extension dead electricity in the case of power supply standby working time.
3rd, the present invention determines that ultracapacitor is minimum according to ultracapacitor minimum and the relation of dump energy
Effective operating voltage.
4th, the most unskilled labourer of the invention according to the desired output power of additional converter, dead electricity stand-by time and ultracapacitor
Make voltage, it is determined that capacity of super capacitor.
Brief description of the drawings
Fig. 1 is a kind of system connection figure of intelligent DC uninterrupted power source based on ultracapacitor of the present invention；
Fig. 2 is the ultracapacitor SC of the present invention remaining energy storage ratio ξ and capacitance voltage graph of a relation.
Embodiment
The embodiment of the present invention is described in further detail below in conjunction with accompanying drawing：
A kind of intelligent DC uninterruptible power system based on ultracapacitor energy storage, as shown in figure 1, including EMI filtering
Circuit, AC/DC rectifiers, converter, two-way gate-controlled switch, ultracapacitor (SC), controller, expansible human-computer interaction interface
With expansible communication interface；
Input single-phase exchange is exported to AC/DC rectifiers through EMI filter circuit, the output end of the AC/DC rectifiers with
Converter is connected, after converter carries out voltage stabilizing, current limliting and filtering, and stable voltage is exported to distribution power automation terminal；
The input of the controller is connected with AC/DC rectifiers, for detecting that single phase ac is after AC/DC rectifications
No dead electricity；The output end of the controller is connected with the two-way gate-controlled switch, for sending response control to two-way gate-controlled switch
Information (PWM) processed；The two-way gate-controlled switch is connected with the ultracapacitor (SC), and the two-way gate-controlled switch is according to reception
Control information (PWM), completes conducting state conversion, realizes SC charge and discharge State Transferrings；The output end of the AC/DC rectifiers
It is connected by two-way gate-controlled switch with the ultracapacitor (SC), when single phase ac is powered, to ultracapacitor (SC)
Carry out onstant current voltage limiting to charge；The ultracapacitor (SC) is defeated by two-way gate-controlled switch and converter and distribution power automation terminal
Enter end to be connected, when single phase ac dead electricity, for powering for distribution power automation terminal.
The part of direct current pressure of the AC/DC rectifiers output provides stable by converter for distribution power automation terminal
Output voltage；When controller detection single phase ac is powered, i.e., controller detects the charged signal of AC/DC rectifiers output
Afterwards, two-way gate-controlled switch forward conduction, another part DC voltage of AC/DC rectifiers output is through two-way gate-controlled switch
Ultracapacitor (SC) carries out onstant current voltage limiting to charge, and when being charged to setting voltage, SC is in floating charge state.
When controller detects one-way communication dead electricity, i.e., controller is detected after the dead electricity signal of AC/DC rectifiers output,
Two-way gate-controlled switch reverse-conducting is controlled, SC is discharged by two-way gate-controlled switch, then by converter to distribution power automation terminal
Stable output voltage is provided, to realize the uninterrupted power supply to distribution power automation terminal.
The output end of the two-way gate-controlled switch and ultracapacitor (SC) is connected with the input of controller respectively, uses
In the working condition (being divided into normal, dead electricity, under-voltage three kinds of working conditions) and super capacitor of collection uninterruptible power system
(SC) charge and discharge state；The controller is also connected with that can expand communication interface, realizes SC charge and discharge state and straight
The working condition signal transporting function of uninterruptible power system is flowed, realizes that dispatching terminal carries out monitoring and remote control in real time, manipulation
It is convenient.
The controller is also connected with expansible human-computer interaction interface, and the human-computer interaction interface is usually exercisable touches
Screen is touched, the field monitoring to DC UPS, field control and warning function can be realized by visual touch-screen.
When inputting one-way communication dead electricity, controller can also be sent to dispatching terminal by expansible communication interface and input list
To exchange dead electricity alarm signal, and power failure state is shown by human-computer interaction interface；When SC is discharged to undervoltage alarm point, control
Device sends undervoltage alarm signal by expansible communication interface to outside, and sends undervoltage warning letter by human-computer interaction interface
Number；When SC is discharged to the minimum of setting, DC UPS system stops powering for distribution power automation terminal.
During normal operation, the full control switch of converter is off state, the output of AC/DC rectifiers directly to
Distribution power automation terminal provides required VD, can reduce switching loss, improve efficiency.
Wherein, SC operating voltage range, to improve energy storage utilization rate, can introduce converter lifting from 0 to rated voltage
Output voltage values, but with the reduction of rated voltage, its storage energy is decreased obviously, and also bring tired to the design of converter
It is difficult.Accordingly, it would be desirable to consider each side factor, optimal SC minimum value is determined.
The optimization method of the minimum of the super capacitor SC is：
Step 1, the remaining energy storage ratio for calculating ultracapacitor SC, and draw ultracapacitor SC's as shown in Figure 2
Remaining energy storage ratio ξ and capacitance voltage graph of a relation；
The remaining energy storage ratio ξ of the step 1 computational methods are：Assuming that before electric discharge, SC initial voltage is UM, it is minimum
Effective operating voltage is Umin, then the energy W=0.5CU stored according to electric capacity2It can obtain, the not available residue thereby resulted in
Energy storage WS(being referred to as " residual energy ") and its primary power WMThe ratio between, i.e. the remaining energy storage ratio ξ of ultracapacitor SC is：
Ultracapacitor SC remaining energy storage ratio ξ and capacitance voltage relation is as shown in Figure 2.
Step 2, remaining energy storage ratio ξ and capacitance voltage graph of a relation according to step 1, determine ultracapacitor SC minimum
Operating voltage.
From Figure 2 it can be seen that WSNot with UminReduction and linearly reduce.Work as UminAfter declining to a certain extent, WSReduction
Become very gentle, therefore be not necessarily to UminIt is designed to too low.Umin>0.5UMWhen SC outputs can meet power reguirements, therefore take
Umin=0.5UM, now, correspondence capacity usage ratio is up to 75% (residue storage energy ratio only 25%).
The optimization method of the capacity of the super capacitor SC is：
Assuming that in DC uninterrupted Switching Power Supply, SC needs the power provided to be P after dead electricityo(output voltage UoAnd electric current
IoProduct), the conversion efficiency of converter is η, it is necessary to which the time maintained is TW, then after dead electricity, the energy that SC should be provided is：
Due to being limited by remaining energy storage ratio, SC discharges available energy should be by initial voltage UMWith effective minimum
Operating voltage UminDetermine, i.e. the available energy of SC isAccording to the conservation of energy, W1=W2, obtain
Go out
The converter of the present invention can be converter purchased in market.
The present invention is relative to traditional intelligence DC UPS, with electric capacity utilization rate is high, circuit element simplifies, power supply
Reliability height, service life cycle length, power density height, the low plurality of advantages of manufacturing cost, are more suitably applied to need instantaneously
Powerful distribution power automation terminal is provided.The intelligent DC developed using optimization method proposed by the invention is uninterruptedly electric
Source, can meet the property indices requirement of distribution power automation terminal power supply.In addition, the present invention can connect with expansible communication
Mouth connection, realizes SC charge and discharge state and the working condition signal transporting function of DC UPS system, realizes scheduling
End carries out monitoring and remote control in real time, and manipulation is convenient.
It is emphasized that embodiment of the present invention is illustrative, rather than it is limited, therefore present invention bag
Include and be not limited to embodiment described in embodiment, it is every by those skilled in the art's technique according to the invention scheme
The other embodiment drawn, also belongs to the scope of protection of the invention.
Claims (6)
1. a kind of intelligent DC uninterruptible power system based on ultracapacitor energy storage, it is characterised in that：Including EMI filtered electricals
Road, AC/DC rectifiers, converter, two-way gate-controlled switch, ultracapacitor SC and controller；
Input single-phase exchange is exported to AC/DC rectifiers, the output end of the AC/DC rectifiers and conversion through EMI filter circuit
Device is connected, after converter carries out voltage stabilizing, current limliting and filtering, and stable voltage is exported to distribution power automation terminal；
The input of the controller is connected with AC/DC rectifiers, for detecting whether single phase ac is lost after AC/DC rectifications
Electricity；The output end of the controller is connected with the two-way gate-controlled switch, for sending response control letter to two-way gate-controlled switch
Breath；The two-way gate-controlled switch is connected with the ultracapacitor SC, and the two-way gate-controlled switch is complete according to control information is received
Into conducting state conversion, ultracapacitor SC charge and discharge State Transferrings are realized；The output end of the AC/DC rectifiers passes through double
It is connected to gate-controlled switch with the ultracapacitor SC, when single phase ac is powered, constant current limit is carried out to ultracapacitor SC
Pressure charging；Ultracapacitor SC is connected by two-way gate-controlled switch and converter with the input of distribution power automation terminal,
When single phase ac dead electricity, for being powered for distribution power automation terminal.
2. a kind of intelligent DC uninterruptible power system based on ultracapacitor energy storage according to claim 1, it is special
Levy and be：The output end of the two-way gate-controlled switch and ultracapacitor SC is connected with the input of controller respectively, is used for
Gather the working condition of uninterruptible power system and super capacitor SC charge and discharge state；The controller is also with that can expand
Communication interface is connected, and realizes super capacitor SC charge and discharge state and the working condition signal of DC UPS system
Transporting function, realizes that dispatching terminal carries out monitoring and remote control in real time.
3. a kind of intelligent DC uninterruptible power system based on ultracapacitor energy storage according to claim 1 or 2, its
It is characterised by：The controller is also connected with expansible human-computer interaction interface, and the human-computer interaction interface is usually exercisable
Touch-screen, the field monitoring to DC UPS, field control and warning function can be realized by visual touch-screen.
4. a kind of intelligent DC uninterruptible power system based on ultracapacitor energy storage as described in claim 1-3 is any
Optimized calculation method, it is characterised in that：The optimized calculation method of the minimum of the super capacitor SC is：
Step 1, the remaining energy storage ratio for calculating ultracapacitor SC, and draw remaining energy storage ratio ξ and normalized electric capacity electricity
Press graph of a relation；
Step 2, the remaining energy storage ratio ξ according to step 1 and normalized capacitance voltage graph of a relation, determine ultracapacitor SC's
Minimum.
5. a kind of optimization of intelligent DC uninterruptible power system based on ultracapacitor energy storage according to claim 4
Computational methods, it is characterised in that：The remaining energy storage ratio ξ of the step 1 computational methods are：Assuming that before electric discharge, SC's is initial
Voltage is UM, minimum effectively operating voltage is Umin, then the energy W=0.5CU stored according to electric capacity2It can obtain, thereby result in not
Available remaining energy storage WSWith its primary power WMThe ratio between, i.e. residue energy storage ratio ξ is：。
6. a kind of optimization of intelligent DC uninterruptible power system based on ultracapacitor energy storage according to claim 4
Computational methods, it is characterised in that：The optimized calculation method of the capacity of the super capacitor SC is：
Assuming that in DC uninterrupted Switching Power Supply, SC needs the power provided to be P after dead electricityo, the conversion efficiency of converter is η,
It is T to need the time maintainedW, then after dead electricity, the energy that SC should be provided is：
Because the available energy of SC isAccording to the conservation of energy, W1=W2, draw
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| CN201710490994.3A CN107248780A (en) | 2017-06-23 | 2017-06-23 | DC UPS system and its optimized calculation method based on ultracapacitor |
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| Application Number | Priority Date | Filing Date | Title |
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| CN201710490994.3A CN107248780A (en) | 2017-06-23 | 2017-06-23 | DC UPS system and its optimized calculation method based on ultracapacitor |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108226747A (en) * | 2017-11-30 | 2018-06-29 | 北京康拓科技有限公司 | A kind of dynamic circuit failure on-line detecting method |
| CN116316765A (en) * | 2023-04-12 | 2023-06-23 | 南通国轩新能源科技有限公司 | Super-capacitor-based energy storage system power-off delay protection method |
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| WO2016080599A1 (en) * | 2014-11-18 | 2016-05-26 | (주)인텍에프에이 | Power quality compensation device using super capacitor, and operating method therefor |
| CN205622303U (en) * | 2016-05-18 | 2016-10-05 | 西安科技大学 | Utilize super capacitor to realize that current transformer of uninterrupted power supply gets electric power supply circuit |
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2017
- 2017-06-23 CN CN201710490994.3A patent/CN107248780A/en active Pending
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| Publication number | Priority date | Publication date | Assignee | Title |
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| WO2016080599A1 (en) * | 2014-11-18 | 2016-05-26 | (주)인텍에프에이 | Power quality compensation device using super capacitor, and operating method therefor |
| CN205622303U (en) * | 2016-05-18 | 2016-10-05 | 西安科技大学 | Utilize super capacitor to realize that current transformer of uninterrupted power supply gets electric power supply circuit |
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| CN108226747A (en) * | 2017-11-30 | 2018-06-29 | 北京康拓科技有限公司 | A kind of dynamic circuit failure on-line detecting method |
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