CN107834693A - A kind of Power transfer system based on seamless switch - Google Patents
A kind of Power transfer system based on seamless switch Download PDFInfo
- Publication number
- CN107834693A CN107834693A CN201711064568.XA CN201711064568A CN107834693A CN 107834693 A CN107834693 A CN 107834693A CN 201711064568 A CN201711064568 A CN 201711064568A CN 107834693 A CN107834693 A CN 107834693A
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- CN
- China
- Prior art keywords
- batteries
- switch
- battery
- spaced apart
- system based
- 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.)
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Classifications
-
- 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
- H02J7/0047—Circuit arrangements for charging or depolarising batteries or for supplying loads from batteries with monitoring or indicating devices or circuits
-
- 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
- H02J7/02—Circuit arrangements for charging or depolarising batteries or for supplying loads from batteries for charging batteries from ac mains by converters
- H02J7/04—Regulation of charging current or voltage
- H02J7/06—Regulation of charging current or voltage using discharge tubes or semiconductor devices
-
- 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
- H02J9/061—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 for DC powered loads
Abstract
The invention discloses a kind of Power transfer system based on seamless switch, this equipment carries out emergency service in substation fault, including being provided with batteries below charging device, the charging device front end face is provided with supervising device, supervising device side is provided with high-frequency rectification switch, exchange input is provided with below the supervising device it is spaced apart and is spaced apart with direct current, battery module and control module are provided with the batteries, control direct current is installed in the control module to be spaced apart, during normal condition, charging device is to battery charging, after system breaks down, batteries are powered.Charging device selects high-frequency rectification type rectifier switch, and charge maintenance is carried out for battery.Three-phase alternating-current supply carries out switching by air switch K1, and air switch K1 is not only controlling electric device, while still protects electrical equipment; when emergency system breaks down; K1 selects different separating brake actuation times according to the size of fault current, cuts off AC power, avoids internal system fault progression.
Description
Technical field
The present invention relates to a kind of emergency power system, and in particular to a kind of Power transfer system based on seamless switch.
Background technology
The DC power system of transformer station, direct current and emergency power supply are provided for substation equipment.In power system 110kV and
The substantially single group battery of following transformer station's configuration, when battery group capacity decline, Individual cells internal fault and need
When carrying out core appearance test, such as without temporary accumulator cell group support straight-flow system, once exchanging interruption whole station direct current can be caused female
The serious consequence of line dead electricity.
There are two kinds of direct current emergency power systems the country at present.One kind is to answer urgent telegram as direct current using traditional lead acid batteries
Source system, the problems such as volume is big, equipment is heavy, short life, charging interval are long, and transport is inconvenient, delay emergency repair time be present；
Another is the emergency power supply of transforming plant system of Proton Exchange Membrane Fuel Cells, but the technology maturation based on fuel cell,
The factors such as operation maintenance, carry out application in power system and difficulty be present.In addition to above two system, other essentially UPS, EPS
Power supply and illumination emergency power supply, still cannot function as the dc source emergency system of power system transformer substation.
To sum up, live a kind of power supply switching system based on seamless switch there is an urgent need to a set of convenience in transport, beneficial to transition
System, emergent as transforming plant DC power supply are used..
The content of the invention
The technical problems to be solved by the invention are that power system 110kV and following transformer station are well matched according to design specification one
A group storage battery is put, when uniquely this group storage battery group failure or the regular full capacity electric discharge core of progress hold test, once appearance
AC interruptions, rectifier charging device failure, straight-flow system such as is supported without extra temporary accumulator cell group, will cause to become
Power station whole station DC supply interruption, out of service using devices such as the protection of dc source, controls are stopped, transformer,
The primary equipments such as breaker lose protection, control function, in case of electric network fault or accident will cause power network can not restore electricity, very
To the serious consequence for causing power grid accident to expand, present invention aims at provide a kind of power supply based on seamless switch to switch system
System, according to site safety and real work, there is an urgent need to we have carried out a kind of based on lithium battery based on seamless switch
The subject study and application of Power transfer system, a set of convenience in transport, the Portable DC mains beneficial to transition are researched and developed
System, emergent as transforming plant DC power supply are used.
The present invention is achieved through the following technical solutions：
A kind of Power transfer system based on seamless switch, this equipment carry out emergency service in substation fault, including
Batteries are provided with below charging device, the charging device front end face is provided with supervising device, and supervising device side is set
There is a high-frequency rectification switch, exchange input is provided with below the supervising device is spaced apart and be spaced apart with direct current, set in the batteries
Battery module and control module are equipped with, control direct current is installed in the control module and is spaced apart, during normal condition, charging device
To battery charging, after system breaks down, batteries are powered.Charging device is opened from high-frequency rectification type rectification
Close, charge maintenance is carried out for battery.Three-phase alternating-current supply carries out switching by air switch K1, and air switch K1 is not only to grasp
Make electrical equipment, while still protect electrical equipment, when emergency system breaks down, K1 selects different separating brakes according to the size of fault current
Actuation time, AC power is cut off, avoids internal system fault progression.High frequency rectifying device is by multiple high frequency switch power moulds
Block forms, and high-frequency switching power supply module is by the alternating current of power frequency through common full-bridge rectifier filter or passive PFC or active PFC rectifications
Filtering is changed into direct current, then is by DC inversion through the high-frequency converter by the use of IGBT or MOSFET as high frequency switching device
More than 20kHz high-frequency alternating current, output end load feedback signal is effectively adjusted by automatic pulse modulation technique, so
Isolate by high frequency transformer, then the high-quality direct current of smooth satisfaction load needs is filtered into through rectifier filter circuit.
Because working frequency is high, switching tube small power consumption, power factor correction circuit so that high frequency switching rectifier module has volume
Small, in light weight, the advantages that noise is low, efficiency and power factor are high, electric parameter is good, easy to maintenance.
Further, the charging device is switched from high-frequency rectification, and charge maintenance, HF switch are carried out for batteries
The alternating current of power frequency is changed into direct current by power switch through common full-bridge rectifier filter or passive PFC or active PFC rectifying and wave-filterings.
Alternating current is changed into by direct current by rectifier switch, allows output to be direct current, is easy to the system with transformer station to be overlapped.
Further, batteries select lithium iron phosphate storage battery, in transformer station after former dc source is out of service, give
DC load is powered.Lithium iron phosphate storage battery can store more energy, energy ratio is big, have extended cycle life, self-discharge rate is small,
Memory-less effect and non-environmental-pollution.For lithium iron phosphate storage battery in charging, the lithium ion Li+ in positive pole passes through membrane for polymer
Migrated to negative pole；In discharge process, the lithium ion Li+ in negative pole is migrated by barrier film to positive pole, in whole charge and discharge process
In do not produce new material.
Further, the supervising device is gathered in real time to batteries information, and given threshold, works as gathered data
During more than threshold value, pass through supervising device early warning.The supervising device is monitored by battery management system to lithium battery group, and
Real time data acquisition, processing, display are carried out by CAN communication.Pass through different capabilities lithium battery flash-over characteristic, service life cycle
Analyzed, the different threshold parameter of every kind of lithium battery can be obtained, by the parameter setting in monitoring unit, pass through the prison
The lithium iron battery group information of control unit collection has charging, electric discharge, electric current, voltage, short circuit, reverse charge and temperature information, contrasts
The threshold value being arranged in monitoring unit, if exceeding threshold information, warned by display, can so realize real-time prison
Control, allows staff to judge whether the system breaks down from the display situation of display.
The present invention compared with prior art, has the following advantages and advantages：
1st, a kind of Power transfer system based on seamless switch of the present invention, will when transformer station direct current system breaks down
The system is integrally placed in by transforming plant DC power-supply device, incoming transport power supply, starts emergency system operation, for Substation Station
With DC load, it is ensured that direct current supply is safe and reliable in standing；
2nd, a kind of Power transfer system based on seamless switch of the present invention, as configuration single group battery transformer station electric discharge core
Hold.In the transformer station of configuration single group battery former batteries can be made safely to depart from bus, carry out the full capacity of 10 hours systems
Verification property discharge test, even if power grid accident causes AC interruptions during test, also can guarantee that the guarantor using dc source
The device normal works such as shield, control, complete the processing to power grid accident and fast recovery of power supply.
Brief description of the drawings
Accompanying drawing described herein is used for providing further understanding the embodiment of the present invention, forms one of the application
Point, do not form the restriction to the embodiment of the present invention.In the accompanying drawings：
Fig. 1 is schematic structural view of the invention.
Fig. 2 is circuit interconnect pattern of the present invention.
Mark and corresponding parts title in accompanying drawing：
1- charging devices, 11- supervising devices, 12- high-frequency rectifications switch, 13- exchange inputs are spaced apart, and 14- direct currents are spaced apart, 2-
Batteries, 21- battery modules, 22- control modules, 23- control dc switch.
Embodiment
For the object, technical solutions and advantages of the present invention are more clearly understood, with reference to embodiment and accompanying drawing, to this
Invention is described in further detail, and exemplary embodiment of the invention and its explanation are only used for explaining the present invention, do not make
For limitation of the invention.
Embodiment
As shown in Fig. 1~2, a kind of Power transfer system based on seamless switch of the present invention, this equipment is in substation fault
Shi Jinhang emergency services, including the lower section of charging device 1 are provided with batteries 2, and the front end face of charging device 1 is provided with monitoring
Device 11, the side of supervising device 11 are provided with high-frequency rectification switch 12, and it is empty that the lower section of supervising device 11 is provided with exchange input
Open 13 and direct current be spaced apart 14, battery module 21 and control module 22 are provided with the batteries 2, in the control module
Control direct current is installed and is spaced apart 23, during normal condition, charging device 1 charges to batteries 2, after system breaks down, storage
Battery pack 2 is powered.Three-phase alternating-current supply carries out switching by air switch K1, and air switch K1 is not only controlling electric device,
Simultaneously or electrical equipment is protected, when emergency system breaks down, when K1 selects different separating brakes actions according to the size of fault current
Between, AC power is cut off, avoids internal system fault progression.High frequency rectifying device is by multiple high-frequency switching power supply module groups
Into high-frequency switching power supply module is by the alternating current of power frequency through common full-bridge rectifier filter or passive PFC or active PFC rectifying and wave-filterings
Be changed into direct current, then through the high-frequency converter by the use of IGBT or MOSFET as high frequency switching device by DC inversion be 20kHz with
On high-frequency alternating current, output end load feedback signal is effectively adjusted by automatic pulse modulation technique, then through height
Frequency power transformer is isolated, then the high-quality direct current of smooth satisfaction load needs is filtered into through rectifier filter circuit.Due to work
Working frequency is high, switching tube small power consumption, power factor correction circuit so that high frequency switching rectifier module has small volume, weight
Gently, the advantages that noise is low, efficiency and power factor are high, electric parameter is good, easy to maintenance.In fig. 2, the electricity of the system is given
Road figure is that K1 is the main contacts that exchange input is spaced apart, and after conductance for alternating current passes to the main contacts K1 that exchange input is spaced apart, exchange is defeated
Entering the main contacts K1 shut-offs being spaced apart, current lead-through measurement apparatus, measurement apparatus detects current and voltage signals, and by current lead-through extremely
Direct current is spaced apart on 14 main contacts K2, and guides circuit to be shunted, and measurement apparatus detects the electricity for flowing into batteries (2) simultaneously
Stream, voltage data, and send to supervising device and battery management system, the main contacts K3 of control dc switch 23 and be arranged on input
In circuit before transformer station, it is spaced apart 23 by the control direct current of outside and is turned off.By electric current in measurement apparatus in the present apparatus
Transformer forms.
The charging device 1 carries out charge maintenance, high frequency switch power from high-frequency rectification switch 12 for batteries 2
The alternating current of power frequency is changed into direct current by switch 12 through common full-bridge rectifier filter or passive PFC or active PFC rectifying and wave-filterings.
Batteries 2 select lithium iron phosphate storage battery, in transformer station after former dc source is out of service, to DC load
Power supply.Lithium iron phosphate storage battery can store more energy, and energy ratio is big, have extended cycle life, self-discharge rate is small, memoryless effect
Should and non-environmental-pollution.In charging, the lithium ion Li+ in positive pole is moved lithium iron phosphate storage battery by membrane for polymer to negative pole
Move；In discharge process, the lithium ion Li+ in negative pole is migrated by barrier film to positive pole, is not produced in whole charge and discharge process
New material.
The supervising device 11 is gathered in real time to the information of batteries 2, and given threshold, when gathered data exceedes threshold
During value, pass through the early warning of supervising device 11.The supervising device 11 is monitored by battery management system to lithium battery group 2, and
Real time data acquisition, processing, display are carried out by CAN communication.The supervising device is by battery management system to lithium battery group
It is monitored, and real time data acquisition, processing, display is carried out by CAN communication.By different capabilities lithium battery flash-over characteristic,
Service life cycle is analyzed, and the different threshold parameter of every kind of lithium battery can be obtained, by the parameter setting in monitoring unit
It is interior, the lithium iron battery group information gathered by the monitoring unit have charging, electric discharge, electric current, voltage, short circuit, reverse charge and
Temperature information, contrast are arranged on the threshold value in monitoring unit, if exceeding threshold information, warned by display, so
Real-time monitoring can be realized, allows staff to judge whether the system breaks down from the display situation of display.
Above-described embodiment, the purpose of the present invention, technical scheme and beneficial effect are carried out further
Describe in detail, should be understood that the embodiment that the foregoing is only the present invention, be not intended to limit the present invention
Protection domain, within the spirit and principles of the invention, any modification, equivalent substitution and improvements done etc., all should include
Within protection scope of the present invention.
Claims (5)
1. a kind of Power transfer system based on seamless switch, it is characterised in that including being provided with electric power storage below charging device (1)
Pond group (2), charging device (1) front end face are provided with supervising device (11), and it is whole that supervising device (11) side is provided with high frequency
Stream switch (12), is provided with that exchange input is spaced apart (13) and direct current is spaced apart (14), the electric power storage below the supervising device (11)
Battery module (21) and control module (22) are provided with pond group (2), control direct current is installed in the control module and is spaced apart
(23), during normal condition, charging device (1) is charged to batteries (2), and after system breaks down, batteries (2) are carried out
Power supply.
A kind of 2. Power transfer system based on seamless switch according to claim 1, it is characterised in that the charging dress
(1) is put from high-frequency rectification switch (12), carries out charge maintenance for batteries (2), high frequency switch power switchs (12) by work
The alternating current of frequency is changed into direct current through common full-bridge rectifier filter or passive PFC or active PFC rectifying and wave-filterings.
A kind of 3. Power transfer system based on seamless switch according to claim 1, it is characterised in that batteries
(2) lithium iron phosphate storage battery is selected, in transformer station after former dc source is out of service, is powered to DC load.
A kind of 4. Power transfer system based on seamless switch according to claim 1, it is characterised in that the monitoring dress
(11) are put to gather batteries (2) information in real time, and given threshold, when gathered data exceedes threshold value, pass through monitoring
Device (11) early warning.
A kind of 5. Power transfer system based on seamless switch according to claim 1, it is characterised in that the monitoring dress
Put (11) to be monitored lithium battery group (2) by battery management system, and real time data acquisition, place are carried out by CAN communication
Reason, display.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201711064568.XA CN107834693A (en) | 2017-11-02 | 2017-11-02 | A kind of Power transfer system based on seamless switch |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201711064568.XA CN107834693A (en) | 2017-11-02 | 2017-11-02 | A kind of Power transfer system based on seamless switch |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN107834693A true CN107834693A (en) | 2018-03-23 |
Family
ID=61650440
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201711064568.XA Withdrawn CN107834693A (en) | 2017-11-02 | 2017-11-02 | A kind of Power transfer system based on seamless switch |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN107834693A (en) |
-
2017
- 2017-11-02 CN CN201711064568.XA patent/CN107834693A/en not_active Withdrawn
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| WW01 | Invention patent application withdrawn after publication |
Application publication date: 20180323 |
|
| WW01 | Invention patent application withdrawn after publication |