CN107947340A - A kind of quick power switching system and its switching method - Google Patents
A kind of quick power switching system and its switching method Download PDFInfo
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- CN107947340A CN107947340A CN201711030092.8A CN201711030092A CN107947340A CN 107947340 A CN107947340 A CN 107947340A CN 201711030092 A CN201711030092 A CN 201711030092A CN 107947340 A CN107947340 A CN 107947340A
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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
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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
- H02J9/02—Circuit arrangements for emergency or stand-by power supply, e.g. for emergency lighting in which an auxiliary distribution system and its associated lamps are brought into service
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- 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
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- 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
Abstract
The invention discloses a kind of quick power switching system, including CPU, DSP, A/D converter, mutual inductor, optical coupling isolator, exit relay, QDJ, power supply module and human-computer interaction module；The CPU and DSP is control module, and CPU connection man-machine interface interactive modules, realize signal transmitted in both directions, DSP connects the A/D converter with optical coupling isolator and receives the digital signal of its output, the action of output control exit relay and QDJ with DSP interconnection；Its control module working method includes normal manual switch mode, judging accident pattern and improper switch mode；Switching method includes parallel connection automatic switchover, semi-automatic switching in parallel, series connection switching and switches at the same time.The present invention is advantageous in that：1. system equipment is simple and has operated；2. switching condition is careful and simple；3. fast speed heat is thrown and synchronization cap-ture technology can realize that stand-by power supply does not power off and automatically engage busbar, power supply reliability is improved.
Description
Technical field
The present invention relates to power system power supply quality management field, more particularly to a kind of quick power switching system and its
Switching method.
Background technology
At present backup auto-activating device is installed between country's transforming plant lead-in, bus connection switch.Backup auto-activating device be typically all by
The position of the switch, checkout voltage, and add suitable time-delay to realize automatically engaging for stand-by power supply, i.e. prepared auto restart electricity low equivalent to busbar
Press " cold throwing ", while backup auto-activating device is without synchronized detection function.There are problems with the application of substation for prepared auto restart：
1）The 110kV substations in power plant are accessed in part, in automatic put-in spair power source in the case of accident, due to non-synchronous
The reason for, impact of closing a floodgate is big, stand-by power supply protection act, the major accident for easily causing whole station to have a power failure；Backup auto-activating device exits
During operation, in power failure all the way, substation will have a power failure half（Split operation mode）Or whole station has a power failure（One one received shipment row of fortune
Mode）.
2）In part 35kV substations, since upper level power supply is from different 110kV, 220kV substations, 35kV substations
There are 30 ° of fixed angular differences between double-cricuit supply inlet wire, double loop cannot carry out Loop Closing Operation arranged side by side, so as to cause double-return circuit electric
One section of busbar must have a power failure during the grid switching operation of source, cumbersome.The type transformer substation spare power automatic switching device, although accident feelings can be played
Automatic closing effect under condition, but since backup auto-activating device is without phase-frequency detection, during automatic closing transformer easily by
Impact failure or insulation ag(e)ing, reduction of service life.
The content of the invention
To solve the above-mentioned problems, the present invention provides a kind of quick power switching system, with adaptive cut-in stand-by is electric
Source and incoming power and its method.
Present invention is disclosed a kind of quick power switching system, including CPU, DSP, A/D converter, mutual inductor, optocoupler every
From device, exit relay, QDJ, power supply module and human-computer interaction module；The CPU and DSP belongs to control module,
The CPU connection man-machine interfaces interactive module, communication module, printer and the functions such as recording are realized, described in the DSP connections
A/D converter and optical coupling isolator and the digital signal for receiving its output, the action of output control exit relay and QDJ；Institute
Mutual inductor output analog signal connection A/D converter is stated, realizes analog data collection function；Optical coupling isolator safety every
From DSP and outside open into；Open into including 9 road signals, input connection optical coupling isolator the outside；The power supply module is
110V/220V DC power supplies, including two pairs of alarms and locking contact, connect each module of system；The human-computer interaction module includes
LCD MODULE, keyboard, indicator light and arm processor, the keyboard connect CPU interaction data information；It is described outlet after
Electric appliance is used for carrying out quick automatic switching, connection DSP control output actions；The QDJ connection incoming powers and exit relay；
+ the E i.e. incoming power, system control it fast and safely to cut off；The printing serial ports is used for connecting printer and CPU.
Present invention further teaches for busbar quick power switching method, the operating mode of the CPU and DSP control module
Including normal manual switch mode, judging accident pattern and improper switch mode；Switching mode include it is in parallel automatically switch,
The semi-automatic switching of parallel connection, series connection switch and switch at the same time；
Described in parallel the step of automatically switching is：
(1) manual starting switches,
(2) when switching condition in parallel meets, CB3 (CB1) switches are closed,
(3) when delay meet " shunt tripping delay " definite value, and confirm CB3 (CB1) switch closing success after, automatic tripping CB1
(CB3) switch；
It is described parallel connection semi-automatic switching the step of be：
（1）Manual starting switches,
（2）When switching condition in parallel meets, CB3 (CB1) switches are closed, the operation of tripping CB1 (CB3) switches is accomplished manually,
（3）If CB1 (CB3) switchs tripping not yet, device alarm and locking switching in 25s；
It is described series connection switching the step of be：
（1）Manual starting switches,
（2）Send and jump CB1 (CB3) switch command, when CB1 (CB3) switchs tripping and switching condition meets, close CB3 (CB1)
Switch,
（3）When start switch after, the frequency difference of 1 voltage of busbar and intended branch voltage less than " cutting frequency difference soon " definite value, differ and be less than
Start during " fast cut phase is poor " definite value and be switched fast,
（4）When 1 voltage of busbar is equal to " with angle of phase lead is caught " definite value, and 1 voltage of busbar and mesh with differing for intended branch voltage
When the frequency difference of mark branch voltage is less than " allowing frequency difference with catching " definite value, start angle of phase lead switching,
（5）When " with catch switch exceeding time " definite value set delay after 1 voltage of busbar between intended branch voltage differ as
Zero and the frequency difference of 1 voltage of busbar and intended branch voltage when being less than " allowing frequency difference with catching " definite value, start exceeding time switching,
（6）When 1 voltage magnitude of busbar is less than " remnant voltage switch amplitude " definite value, start remnant voltage switch, when in " long delay time "
When above-mentioned four kinds of switching conditions are unsatisfactory in the delay of definite value setting, start delayed transfer；
Described while the step of switching is：
（1）Manual starting switches,
（2）Send and jump CB1 (CB3) switch command, after definite value " while switch combined floodgate delay ", no matter CB1 (CB3) switches whether
Tripping, i.e. hair closes CB3 (CB1) switch command when switching condition meets.
For busbar quick power switching method, including normal manual switch mode, judging accident pattern and improper
Switch mode；When the operating mode is normal manual switch mode, which judges that start mode passes through device menu
Start or started by console/DCS distant places on the spot；When the operating mode is judging accident pattern, which judges
Start mode is by protecting contact to start；When the operating mode is improper switch mode, when the operating mode judges to start
Mode starts automatically comprising bus loss of pressure, circuit is started without the automatic starting of stream and switch jump；When the operating mode is normal hand
During dynamic switch mode, which can be divided into two kinds, the first switches to be in parallel, second to be switched fast, more before
Phase angle switching, exceeding time switching, remnant voltage switch and delayed transfer.The first is switched and determined the switching mode of condition as simultaneously
Connection automatically switches and semi-automatic switching in parallel, and the switching mode of second of switching determination condition switches for series connection switching and at the same time；
When the operating mode is judging accident, the switching determination condition is is switched fast, angle of phase lead switches, exceeding time switches,
Remnant voltage switch and delayed transfer, the switching mode is series connection switching and switches at the same time；When the operating mode is cut to be improper
When changing, the switching determination condition is is switched fast, angle of phase lead switches, exceeding time switches, remnant voltage switch and long delay are cut
Change；When the operating mode judges that start mode starts automatically for bus loss of pressure, the switching mode is series connection switching and cuts at the same time
Change；When the operating mode judges start mode for circuit without automatic start is flowed, which switches for series connection and cuts at the same time
Change；When the operating mode judges that start mode starts for switch jump, which switches for series connection.
It is an advantage of the invention that：The theoretical substation's power supply that is applied to of advanced " fast speed heat throwing " " synchronization cap-ture " switching is thrown
In cutting system, solving 110kV substations has under the method for operation that power plant accesses, and during incoming power line fault, causes to generate electricity
The non-synchronous problem arranged side by side of factory；When there is ± 30 ° of angular differences between solution 35kV substations power supply entering line, grid switching operation needs temporary interruption
The problem of.Innovation throws technology using fast speed heat, prevents the impact shoved to caused by generating set, capacitor group and switch；Profit
There are stream direction overcurrent lock-out techniques with power supply, prevent extension wire from throwing to fault bus, to ensureing that substation's reliable power supply has
Significance.
Brief description of the drawings
Fig. 1 is the schematic diagram of one quick power switching system of present example example.
Fig. 2 is one power supply rapid switching device panel layout of present example example.
Fig. 3 is one power supply rapid switching device backboard layout drawing of present example example.
Fig. 4 connects application schematic diagram for one power supply rapid switching device of present example example.
Fig. 5 is switched fast starting schematic diagram for present example example one without stream.
Fig. 6 switchs jump for present example example one and is switched fast starting schematic diagram.
Embodiment
Below in conjunction with the accompanying drawings and specific embodiment is further elaborated present disclosure, but embodiment is only this
The better embodiment of invention, therefore the equivalence changes that all features and principle according to described in present patent application scope are done,
It is included in the range of present patent application.
As shown in Figure 1, a kind of quick power switching system, include CPU, DSP, A/D converter, mutual inductor, optocoupler every
From device, exit relay, QDJ, power supply module and human-computer interaction module；The CPU, which is used for controlling whole system, to be managed,
And man-machine interface interaction is connected, communicates and realizes the functions such as recording；The DSP is used for realizing Digital Signal Processing, logic meter
Calculate and tripping exports, using optical fiber interface synchronous communication, for connecting the A/D converter and receiving the numeral letter of its output
Number；The mutual inductor is used for completing the security measurement work of electric index, realizes analog data collection function；The light-coupled isolation
Device is used for opening into and realizing security isolation to DSP transmission is exterior；Open into including 9 road signals the outside；The power supply supplies mould
Block is 110V/220V DC power supplies, including two pairs of alarms and locking contact；The human-computer interaction module includes liquid crystal display mode
Block, keyboard, indicator light and arm processor, the arm processor are used for completing the realization control of LCD MODULE, keyboard
Processing and pass through serial ports and CPU interaction data information；The exit relay is used for carrying out quick automatic switching, by DSP
Control action；The QDJ is used for safety excision incoming power and exit relay；+ the E i.e. incoming power.
Present invention further teaches for busbar quick power switching method, including normal manual switch mode, judging accident
Pattern and improper switch mode；When the operating mode is normal manual switch mode, the control model judges
Flowing mode is started or started by console/DCS distant places on the spot by device menu；When the operating mode is judging accident mould
During formula, the control model judges start mode by protecting contact to start；When the operating mode is improper switch mode
When, started automatically comprising bus loss of pressure when the operating mode judges start mode, circuit is started automatically without stream and switch jump
Start；When the operating mode is normal manual switch mode, the switching determination condition can be divided into two kinds, the first is simultaneously
Connection switching, second to be switched fast, angle of phase lead switching, exceeding time switching, remnant voltage switch and delayed transfer.First
The switching mode of kind of switching determination condition automatically switches and semi-automatic switching in parallel to be in parallel, and second switching determination condition is cut
Mode is changed as series connection switching and while is switched；When the operating mode is judging accident, the switching determination condition is quick
Switching, angle of phase lead switching, exceeding time switching, remnant voltage switch and delayed transfer, the switching mode switch for series connection
With switch at the same time；When the operating mode is improper switching, the switching determination condition is is switched fast, angle of phase lead is cut
Change, exceeding time switching, remnant voltage switch and delayed transfer；When the operating mode judge start mode for bus loss of pressure from
During dynamic starting, the switching mode is series connection switching and switches at the same time；When the operating mode judge start mode for circuit without
When flowing automatic start, the switching mode switches for series connection and switches at the same time；When the operating mode judges start mode to open
When closing jump starting, the switching mode switches for series connection.
As shown in figure 4, left figure being switched fast for block switch, i.e. two sections of busbares are supplied by each self powered supply branch respectively
Electricity, branch 1 switchs CB1, branch 2 switchs CB2 and closes, and bus connection switch CB3 divide position.When any power supply branch trouble,
PCS-9655S power supply rapid switching devices are according to fault condition, tripping CB1（Or CB2）, close bus connection switch CB3, two sections of busbares
Power by trouble-free power branch, ensure two sections of busbares not dead electricity.Also manually controllable CB1（Or CB2）With point of CB3
Close, be powered the switching of power branch.As shown in figure 4, right figure being switched fast for service entrance switch, i.e. bus connection switch CB3 begin
Position is closed eventually, switches in two-way progress between CB1 and CB2.When power branch trouble when, PCS-9655S power supply rapid switching devices
According to fault condition, tripping power supply branch switch, closes stand-by power supply branch switch, two sections of busbares are by trouble-free power branch
Power supply, ensures two sections of busbares not dead electricity.Also the division of manually controllable CB1 and CB2, is powered the switching of power branch.
Normal manual switching refers to the power supply switching carried out under normal circumstances.Pass through device screen menu or console switch
Or ECS/DCS systems manual starting switching, complete the two-way switching between switch CB1 and CB3.Normal manual switching can be remote
Fang Qidong switchings can also start switching on the spot.
When " throwing remote control " is opened into exiting, manual switching control authority is " controlling on the spot ", can only pass through device screen menu
Switching is started, operating process refers to " manual switching " part of 6.2.5 sections " local command ".Switching mode is by " switching side on the spot
Formula " definite value determines；
When " throw remote control " is opened into input, manual switching control authority is " distant place control ", by console switch, on-screen button or
ECS/DCS system access " 1 manual switching of branch " is opened into manual starting switching.Switching mode is divided into two groups：" manual switching
Mode selects " when opening into input, switching mode is series connection switching or switches at the same time, is determined by " distant place go here and there same switching mode " definite value
It is fixed；When " manual switching mode selects " is opened into exiting, switching mode is automatic switchover in parallel or semi-automatic switching in parallel, by " remote
Fang Binglian switching modes " definite value determines.
Handoff procedure is summarized as follows：
1）Parallel connection is automatically switched
Manual starting switches, and when switching condition in parallel meets, closes CB3 (CB1) switches, delay meets that " shunt tripping delay " is fixed
Value, and after confirming CB3 (CB1) switch closing success, automatic tripping CB1 (CB3) switch.
2）Semi-automatic switching in parallel
Manual starting switches, and when switching condition in parallel meets, closes CB3 (CB1) switches, the operator of tripping CB1 (CB3) switches
Work is completed.If CB1 (CB3) switchs tripping not yet, device alarm and locking switching in 25s；
No matter which kind of above-mentioned mode, switching condition in parallel refers both to：
(1) busbar 1 and pressure difference between intended branch≤" switching pressure difference in parallel " definite value；
(2) busbar 1 and frequency difference between intended branch≤" switching frequency difference in parallel " definite value；
(3) busbar 1 is with differing≤" parallel connection switching differs " definite value between intended branch；
(4) device is non-latching.
If switching condition in parallel is unsatisfactory for after starting, device switches locking, waits involution.
3）Series connection switching
Manual starting switches, and sends and jumps CB1 (CB3) switch command, when CB1 (CB3) switchs tripping and switching condition meets, closes
Upper CB3 (CB1) switch.Switching condition includes：Be switched fast, angle of phase lead switching, exceeding time switching, remnant voltage switch, length prolong
When switch.Automatically angle of phase lead switching, exceeding time switching, remnant voltage switch, delayed transfer are transferred to when being switched fast unsuccessful.
The condition of being switched fast is：After starting switching, 1 voltage of busbar and the frequency difference of intended branch voltage are less than " cutting frequency difference soon "
Definite value, difference are switched fast condition satisfaction when being less than " fast cut phase is poor " definite value.
Angle of phase lead switching condition is：1 voltage of busbar and differing for intended branch voltage are fixed equal to " with angle of phase lead is caught "
Value, and angle of phase lead switching condition is expired when the frequency difference of 1 voltage of busbar and intended branch voltage is less than " with permission frequency difference is caught " definite value
Foot.
Exceeding time switching condition is：According to the frequency difference and phase angle difference of current 1 voltage of busbar and intended branch voltage, in real time
Calculate " switch exceeding time " definite value setting delay after 1 voltage of busbar and differing between intended branch voltage, difference be zero and
Exceeding time switching condition meets when the frequency difference of 1 voltage of busbar and intended branch voltage is less than " allowing frequency difference with catching " definite value.
Remnant voltage switch condition is：When 1 voltage magnitude of busbar is less than " remnant voltage switch amplitude " definite value, remnant voltage switch condition expires
Foot.
Delayed transfer condition is：In the delay of " long delay time " definite value setting, if above-mentioned four kinds of switching conditions
It is unsatisfactory for, then delayed transfer condition meets after being delayed.
Hereinafter " be switched fast, angle of phase lead switching, exceeding time switching, remnant voltage switch, delayed transfer " switching
Condition is consistent with foregoing description.
4）Switch at the same time
Manual starting switches, and sends and jumps CB1 (CB3) switch command, after definite value " while switch combined floodgate delay ", no matter CB1
(CB3) switch whether tripping, when switching condition meets i.e. hair conjunction CB3 (CB1) switch command.Switching condition includes：Be switched fast,
Angle of phase lead switching, exceeding time switching, remnant voltage switch, delayed transfer.Automatically more preceding phase is transferred to when being switched fast unsuccessful
Angle switching, exceeding time switching, remnant voltage switch, delayed transfer.
Handoff procedure is as follows in detail：
（1）=ON, " manual switching mode selects "=ON " are thrown and far controlled " in opening." the total input of switching "=input, " normal in definite value
Switching "=input, " the same switching mode of distant place string "=series connection." 1 manual switching of branch " is opened closes short pulse into input.Then a distant place is gone here and there
Same switching mode, normal manual switching and series connection switching mode.
（2）=ON, " manual switching mode selects "=ON " are thrown and far controlled " in opening." the total input of switching "=input in definite value,
" normal switching "=input, " the same switching mode of distant place string "=at the same time." 1 manual switching of branch " is opened closes short pulse into input.Then
The same switching mode of distant place string, at the same time normal manual switching and switching mode.
（3）=ON, " manual switching mode selects "=OFF " are thrown and far controlled " in opening." the total input of switching "=input in definite value,
" normal switching "=input, " distant place parallel connection switching mode "=automatic." 1 manual switching of branch " is opened closes short pulse into input.Then
The same switching mode of distant place string, normal manual switching and switching mode in parallel.
（4）=ON, " manual switching mode selects "=OFF " are thrown and far controlled " in opening." the total input of switching "=input in definite value,
" normal switching "=input, " distant place parallel connection switching mode "=semi-automatic." 1 manual switching of branch " is opened closes short pulse into input.
The then same switching mode of distant place string, normal manual switching and semi-automatic switching mode in parallel.
（5）=OFF " is thrown and far controlled " in opening." the total input of switching "=input in definite value, " normal switching "=input, " cuts on the spot
Change mode "=series connection." 1 manual switching of branch " menu is operated by prompting.Then switching mode, normal manual switch and connect on the spot
Switching mode.
（6）=OFF " is thrown and far controlled " in opening." the total input of switching "=input in definite value, " normal switching "=input, " cuts on the spot
Change mode "=at the same time." 1 manual switching of branch " menu is operated by prompting.Then switching mode on the spot, normal manual switching and at the same time
Switching mode.
（7）=OFF " is thrown and far controlled " in opening." the total input of switching "=input in definite value, " normal switching "=input, " cuts on the spot
Change mode "=automatic." 1 manual switching of branch " menu is operated by prompting.Then switching mode on the spot, normal manual switching and in parallel
Automatic switching mode.
（8）=OFF " is thrown and far controlled " in opening." the total input of switching "=input in definite value, " normal switching "=input, " cuts on the spot
Change mode "=semi-automatic." 1 manual switching of branch " menu is operated by prompting.Then switching mode on the spot, normal manual switching and simultaneously
Join semi-automatic switching mode.
Judging accident refers to switch caused by branch's failure.Protective device outlet junctions in branch 1 are accessed
" branch 1 protection start " of the present apparatus is opened into being started and switched by protection exit, can only switch to CB3 by CB1.
Judging accident be divided into series connection switching and while switch two ways, determined by " judging accident mode " definite value.
Handoff procedure is summarized as follows：
1）Series connection switching
Protection exit by reflecting 1 failure of branch starts, and sends and jumps CB1 switch commands, treats CB1 switch trippings and switching bar
When part meets, CB3 switches are closed.Switching condition includes：It is switched fast, angle of phase lead switches, exceeding time switches, residual voltage is cut
Change, delayed transfer.Be transferred to automatically when being switched fast unsuccessful angle of phase lead switching, exceeding time switching, remnant voltage switch, length prolong
When switch.I.e. when " the total input of switching "=input, " judging accident "=input, " judging accident mode "=series connection in definite value." branch 1
Protection starts " open into input closure short pulse.
2）Switch at the same time
Protection exit by reflecting branch 1 failure starts, and sends and jumps CB1 switch commands, " while switches combined floodgate through definite value and prolongs
When " after, no matter CB1 switch whether tripping, when switching condition meets i.e. hair conjunction CB3 switch commands.Switching condition includes：Quickly
Switching, angle of phase lead switching, exceeding time switching, remnant voltage switch, delayed transfer.It is transferred to automatically more when being switched fast unsuccessful
Preceding phase angle switching, exceeding time switching, remnant voltage switch, delayed transfer.I.e. when " the total input of switching "=input, " accident in definite value
Switching "=input, " judging accident mode "=at the same time." protection of branch 1 starts " opens closes short pulse into input.
Abnormal switching includes three kinds of modes, and bus loss of pressure switching, start switching and switch jump switching without stream.
Busbar voltage is consistently less than " decompression starting amplitude " definite value and time of the inlet wire without stream (6%In) exceedes " decompression
Dynamic delay " definite value, device start switching automatically.
Bus loss of pressure switching is divided into series connection and at the same time two ways, is determined by " decompression switching mode " definite value, handoff procedure
It is identical with judging accident, CB3 can only be switched to by CB1.
Its starting conditions is as follows：
When " the total input of switching "=input, " decompression switching "=input, " decompression switching mode "=series connection in definite value.1 three-phase electricity of busbar
Pressure is consistently less than " decompression starting amplitude " definite value, and branch 1 without stream, then abnormal switching-bus loss of pressure switching mode is series connection
Switching mode.
When " switching total input "=input in definite value, " decompression switching "=put into, " decompression switching mode "=at the same time.Busbar 1 three
Phase voltage is consistently less than " decompression starting amplitude " definite value, and branch 1 without stream, then abnormal switching-bus loss of pressure switching mode is
Switching mode at the same time
As shown in figure 5, starting switching starting logic chart without stream for circuit 1, follow-up jump, closing operation are square using series connection or at the same time
Formula determines that handoff procedure is identical with judging accident by [no stream switching mode] definite value, can only switch to CB3 by CB1.2 nothing of circuit
Stream starts switching and logic class of the circuit 1 without stream starting switching is same.
As shown in fig. 6, when CB1 switch mis-jumpings are opened caused by maloperation, switching mechanism failure and other reasons, device starts automatically
Switching, when switching condition meets, closes CB3 switches.CB3 can only be switched to by CB1.Switching condition includes：Be switched fast, more before
Phase angle switching, exceeding time switching, remnant voltage switch, delayed transfer.Automatically angle of phase lead is transferred to when being switched fast unsuccessful to cut
Change, exceeding time switching, remnant voltage switch, delayed transfer.
The present invention includes low-voltage load sheding and controls, and the control sets two sections of low-voltage load shedings to export altogether, " off-load I " and " off-load
II ", two sections of outlet action process are identical, by taking one section of low-voltage load sheding as an example：In handoff procedure, when busbar voltage is consistently less than
" one section of amplitude of low-voltage load sheding " definite value, after meeting the setting delay of definite value " low-voltage load sheding one section delay ", for the benefit of Important Auxiliary equipment
Self-starting, low-voltage load sheding one section outlet, cuts off secondary subsidiary engine.Outlet junctions are the make pulse signal of 1s.
Two sections of delay definite values and voltage magnitude can be set respectively, be closed with intended branch switch for the time delay initialization time.This
Function is when the present apparatus switches over and intended branch is switched after closing and automatically engaged, and is automatically exited from after putting into 1s.
The present invention includes after accelerated protection and controls, and in switching to prevent miscarrying fault bus, it is secondary that the present apparatus will export two
Pulse signal contact, with branch's after accelerated protection cooperation, quickly cuts off failure.The contact is the make pulse signal of 1s.
The occasion protected for no branch, the system provide after accelerated protection function.After intended branch switch closes, rear
Accelerate in effective time（It is fixed open for 6S after combined floodgate）Monitor intended branch electric current, such as any phase current exceedes " rear to accelerate electricity
Flow amplitude " definite value, jump intended branch switch after meeting " rear to accelerate delay " definite value.
The present invention includes overcurrent lock-in control, and failure is bypassed the immediate leadership under trip condition, if lacking corresponding hardwire block signal,
Fast switching device will switch by mistake, and stand-by power supply is miscarried fault bus, causes fault coverage to expand.To prevent the situation from sending out
Raw, the present apparatus provides overcurrent locking handoff functionality, when failure bypasses the immediate leadership tripping can automatic blocking switching, according to being after trouble shooting
System operating status device automatically terminates locking switching, puts into operation again.
When 1 electric current of circuit persistently exceedes " branch's 1 overcurrent locking delay " more than the time of " 1 overcurrent locking amplitude of branch "
During definite value, locking switching.Overcurrent blocking function can be selected by " overcurrent locking is through direction " definite value whether through direction.Directional element
Fineness angle be 225 degree, using 90 degree of modes of connection.Directional element and current element are connected into by phase Starting mode.Directional element
With memory function, the dead band of directional element when can eliminate nearby three-phase shortcircuit.
The present invention include bus-tie circuit breaker shunt tripping control, when remnant voltage switch, delayed transfer due to pressure difference it is larger to capacitor
Or small power supply sets busbar shunt tripping function there are during greater impact, control word [shunt tripping busbar 1 switchs] and [shunt tripping mother can be passed through
Line 2 switchs] whether shunt tripping respective bus bars switch for setting.When meeting remnant voltage switch or delayed transfer, device shunt tripping phase first
After answering bus-tie circuit breaker and judging respective switch bus-tie circuit breaker tripping, follow-up handover operation is just carried out.In definite value, [divide-shut brake pulse is most
Big time broadening] in the time, if response shunt tripping switchs non-tripping, handoff failure, terminates handoff procedure.
The foregoing is merely presently preferred embodiments of the present invention, the equivalent change that all claims under this invention are done is with repairing
Decorations, should all belong to the covering scope of the present invention.
Claims (8)
- A kind of 1. quick power switching system, it is characterised in that including：CPU, DSP, A/D converter, mutual inductor, light-coupled isolation Device, exit relay, QDJ, power supply module and human-computer interaction module；The CPU and DSP belongs to control module, the CPU connection man-machine interfaces interactive module, communication module, printer And realize the functions such as recording, the DSP connections A/D converter and optical coupling isolator and the numeral letter for receiving its output Number, the action of output control exit relay and QDJ；The mutual inductor output analog signal connection A/D converter, realizes simulation Measure data acquisition function；The optical coupling isolator security isolation DSP and outside open into；The outside is opened into including 9 road signals, defeated Enter to connect optical coupling isolator；The power supply module is 110V/220V DC power supplies, including two pairs of alarms and locking contact, Each module of connection system；The human-computer interaction module includes LCD MODULE, keyboard, indicator light and arm processor, described Keyboard connects CPU interaction data information；The exit relay is used for carrying out quick automatic switching, and connection DSP control outputs are dynamic Make；The QDJ connection incoming powers and exit relay；+ the E i.e. incoming power, system control it fast and safely to cut off； The printing serial ports is used for connecting printer and CPU.
- A kind of 2. quick power switching method, it is characterised in that the CPU and the operating mode of DSP control module are included normally Manual switching pattern, judging accident pattern and improper switch mode；Switching mode include it is in parallel automatically switch, in parallel half from Dynamic switching, series connection switch and switch at the same time；Described in parallel the step of automatically switching is：(1) manual starting switches,(2) when switching condition in parallel meets, CB3 (CB1) switches are closed,(3) when delay meet " shunt tripping delay " definite value, and confirm CB3 (CB1) switch closing success after, automatic tripping CB1 (CB3) switch；It is described parallel connection semi-automatic switching the step of be：（1）Manual starting switches,（2）When switching condition in parallel meets, CB3 (CB1) switches are closed, the operation of tripping CB1 (CB3) switches is accomplished manually,（3）If CB1 (CB3) switchs tripping not yet, device alarm and locking switching in 25s；It is described series connection switching the step of be：（1）Manual starting switches,（2）Send and jump CB1 (CB3) switch command, when CB1 (CB3) switchs tripping and switching condition meets, close CB3 (CB1) Switch,（3）When start switch after, the frequency difference of 1 voltage of busbar and intended branch voltage less than " cutting frequency difference soon " definite value, differ and be less than Start during " fast cut phase is poor " definite value and be switched fast,（4）When 1 voltage of busbar is equal to " with angle of phase lead is caught " definite value, and 1 voltage of busbar and mesh with differing for intended branch voltage When the frequency difference of mark branch voltage is less than " allowing frequency difference with catching " definite value, start angle of phase lead switching,（5）When " with catch switch exceeding time " definite value set delay after 1 voltage of busbar between intended branch voltage differ as Zero and the frequency difference of 1 voltage of busbar and intended branch voltage when being less than " allowing frequency difference with catching " definite value, start exceeding time switching,（6）When 1 voltage magnitude of busbar is less than " remnant voltage switch amplitude " definite value, start remnant voltage switch, when in " long delay time " When above-mentioned four kinds of switching conditions are unsatisfactory in the delay of definite value setting, start delayed transfer；Described while the step of switching is：（1）Manual starting switches,（2）Send and jump CB1 (CB3) switch command, after definite value " while switch combined floodgate delay ", no matter CB1 (CB3) switches whether Tripping, i.e. hair closes CB3 (CB1) switch command when switching condition meets.
- 3. quick power switching method as claimed in claim 2, it is characterised in that the CPU and the work of DSP control models Pattern is normal manual switch mode, which judges that start mode starts or pass through control on the spot by device menu Platform/DCS distant places start；When the CPU and the operating mode of DSP control models are judging accident pattern, which judges Start mode is by protecting contact to start；When the CPU and the operating mode of DSP control models are improper switch mode, when The operating mode judges that start mode starts automatically comprising bus loss of pressure, circuit is started without the automatic starting of stream and switch jump.
- 4. quick power switching method as claimed in claim 2, it is characterised in that the CPU and the work of DSP control models Pattern is normal manual switch mode, which can be divided into two kinds, the first switches to be in parallel, and second is quick Switching, angle of phase lead switching, exceeding time switching, remnant voltage switch and delayed transfer.The first is switched and determined cutting for condition Mode is changed to be in parallel to automatically switch and semi-automatic switching in parallel, the switching mode of second of switching determination condition for series connection switching and Switch at the same time.
- 5. quick power switching method as claimed in claim 2, it is characterised in that the CPU and the work of DSP control models Pattern is judging accident, the switching determination condition for be switched fast, angle of phase lead switching, exceeding time switching, remnant voltage switch with And delayed transfer, the switching mode is series connection switching and switches at the same time.
- 6. quick power switching method as claimed in claim 2, it is characterised in that the CPU and the work of DSP control models Pattern is improper switching, and the switching determination condition is is switched fast, angle of phase lead switches, exceeding time switches, remnant voltage switch And delayed transfer；When the operating mode judges that start mode starts automatically for bus loss of pressure, which is series connection Switch and switch at the same time；When the operating mode judges that start mode starts automatically for circuit without stream, which is series connection Switch and switch at the same time；When the operating mode judges that start mode starts for switch jump, which switches for series connection.
- 7. quick power switching method as claimed in claim 2, it is characterised in that the CPU and DSP control models further include Low-voltage load sheding control, after accelerated protection control, overcurrent lock-in control and the control of bus-tie circuit breaker shunt tripping.
- 8. quick power switching system as claimed in claim 1, it is characterised in that further include communication module, the communication mould Block is RS485 serial communications, and communication interface supports IEC60870-5-103 and Modbus communications protocol.
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| CN201711030092.8A CN107947340B (en) | 2017-10-30 | 2017-10-30 | Power supply fast switching system and switching method thereof |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN110034604A (en) * | 2019-04-18 | 2019-07-19 | 徐州矿达机电科技有限公司 | A kind of dual power supply fast switching system |
| CN110504683A (en) * | 2019-08-20 | 2019-11-26 | 国家能源集团宁夏煤业有限责任公司 | The control method and control system of grid switching operation |
| CN111711261A (en) * | 2020-07-02 | 2020-09-25 | 陕西榆林能源集团横山煤电有限公司 | Method for manually switching factory power supply to different network power supply and automatically judging |
| CN112039205A (en) * | 2020-08-28 | 2020-12-04 | 国网河南省电力公司技能培训中心 | Remote local switch with remote authorization control function and mode control method |
| CN113872315A (en) * | 2021-09-28 | 2021-12-31 | 北京正大蛋业有限公司 | Chicken coop fan power supply standby system raises in cages |
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Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110034604A (en) * | 2019-04-18 | 2019-07-19 | 徐州矿达机电科技有限公司 | A kind of dual power supply fast switching system |
| CN110504683A (en) * | 2019-08-20 | 2019-11-26 | 国家能源集团宁夏煤业有限责任公司 | The control method and control system of grid switching operation |
| CN111711261A (en) * | 2020-07-02 | 2020-09-25 | 陕西榆林能源集团横山煤电有限公司 | Method for manually switching factory power supply to different network power supply and automatically judging |
| CN112039205A (en) * | 2020-08-28 | 2020-12-04 | 国网河南省电力公司技能培训中心 | Remote local switch with remote authorization control function and mode control method |
| CN112039205B (en) * | 2020-08-28 | 2024-02-27 | 国网河南省电力公司技能培训中心 | Remote on-site switch with remote authorization control function and mode control method |
| CN113872315A (en) * | 2021-09-28 | 2021-12-31 | 北京正大蛋业有限公司 | Chicken coop fan power supply standby system raises in cages |
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| Publication number | Publication date |
|---|---|
| CN107947340B (en) | 2022-05-10 |
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