CN108879936A - A kind of four power supply fast switching devices - Google Patents
A kind of four power supply fast switching devices Download PDFInfo
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- CN108879936A CN108879936A CN201710334030.XA CN201710334030A CN108879936A CN 108879936 A CN108879936 A CN 108879936A CN 201710334030 A CN201710334030 A CN 201710334030A CN 108879936 A CN108879936 A CN 108879936A
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- power supply
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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
- 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
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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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- Engineering & Computer Science (AREA)
- Power Engineering (AREA)
- Remote Monitoring And Control Of Power-Distribution Networks (AREA)
Abstract
The embodiment of the invention discloses a kind of four power supply fast switching devices.Device includes：Measure voltage & is used to detect the power circuits of two power supplys connected on the first bus, the power circuit of two power supplys connected on the second bus and the voltage on the first bus and the second bus, and/or four articles of power circuits and connection the first bus and the second bus the 5th power circuit on electric current；On-off signal output module is used to detect the on-off model of the breaker on each power circuit；The corresponding breaker open operation of trouble power is controlled, and synchronously control corresponds to the breaker closing of backup power source；Microprocessor is used to confirm the position of the power supply to break down；Divide-shut brake signal is generated according to the position of trouble power, and divide-shut brake signal is sent to On-off signal output module.The embodiment of the present invention is able to achieve power supply of the load when four-way power supply breaks down and cuts automatic switchover fastly, compared with prior art, can further improve power supply reliability.
Description
Technical field
The present embodiments relate to the fast incision technology fields of power supply, and in particular to a kind of four power supply fast switching devices.
Background technique
The large and medium-sized industrial enterprise such as petrochemical industry, metallurgy, due to external electrical network or in-line power network failure or exception,
The case where causing improper power failure, voltage fluctuation or short supply interruption (being commonly called as " shaking electricity ") is commonplace.Due to metallurgy, petrochemical industry
The particularity of enterprise's process flow, the interruption of power supply or it is abnormal often will cause equipment stop transport or idle running, process flow interrupt or
Waste product generates, and even causes the serious consequences such as scrap of production equipment sometimes.
Currently, it is primary system using two-way or multiple-way supply that industrial enterprise, which solves the main method of power supply reliability, then
It is aided with electrical secondary system using backup auto-activating device.For general industry enterprise, backup auto-activating device can satisfy requirement, and
The using effect of the enterprise that the requirements such as petrochemical industry, metallurgy are continuously powered, prepared auto restart is unsatisfactory.The reason is that these enterprises have largely
Induction-motor load, due to the presence of motor feedback voltage, from power loss to decompression and then without pressure, the process of prepared auto restart execution
Duration is up to 1-2 seconds or even longer, and by excision in batches, (drop-away time of high-voltage motor is generally motor at this time
500ms).Even the delay time important motor of longer high pressure is not removed, since bus (is generally determined without pressure without pressure
Value is the 20%-35% of voltage rating), revolving speed degradation directly affects the continuity of production process, and to product matter
Amount causes adverse effect.And restore electricity will cause biggish motor self-staring electric current at this time, punching is generated to supply network
It hits.
Therefore, many industrial enterprises have installed power supply rapid switching device (cutting fastly) at present.The basic principle cut fastly is fast
Faulty line is opened in quick-break, and according to the variation of motor bus residual voltage, mother is made to close a floodgate rapidly, and make suffered by motor and system
Impact is can be in tolerance range.Since the judgement cut fastly is to judge failure based on this transient of motor feedback voltage
And the time of reclosing is very fast, generally in tens ms to several hundred ms, will not cause the damage and production procedure of production equipment
It interrupts, being switched fast when being able to satisfy utility power grid power failure and safe power supply.
But during realizing the embodiment of the present invention, inventor is had found with the expansion of size industrial enterprises and to power supply
The raising of reliability requirement, certain newly-built large-scale industry utility power grids have used four power supply architectures, i.e., are work by four-way power supply
The power supply of industry utility power grid.Current fast switching device can not adapt to the flexible and changeable topology requirement of four power generating facilities and power grids.
Summary of the invention
One purpose of the embodiment of the present invention is to solve the prior art not adapting to the demand of four power supply power supply power grids.
The embodiment of the present invention proposes a kind of four power supply fast switching devices, including：Measure voltage &, On-off signal
Output module and microprocessor；
The measure voltage &, for detect connected on the first bus two power supplys power circuit, second
The power circuit and the voltage on first bus and second bus of two power supplys connected on bus, and/or, four
Electric current on the power circuit and connection first bus of a power supply and the 5th power circuit of second bus；
The On-off signal output module, for by four power circuits breaker and connection first, second it is female
The on-off model of the 5th breaker is sent to microprocessor on 5th power circuit of line；It is sent according to the microprocessor
Divide-shut brake signal controls the corresponding breaker open operation of trouble power, and synchronously control corresponds to the breaker closing of backup power source；
The microprocessor, for the switch according to voltage and or current and each breaker on five power circuits
The position for the power supply that amount signal confirmation is broken down；Divide-shut brake signal is generated according to the position of trouble power, and by the division
Lock signal is sent to the On-off signal output module.
Optionally, described device further includes：Human-machine interface module；
The human-machine interface module is sent to institute for receiving the configuration information artificially inputted, and by the configuration information
State microprocessor.
Optionally, the configuration information includes：Breakdown judge mode；
Correspondingly, the microprocessor, for when current failure judgment mode is protection starting, route to be vertical if detecting
Gap then determines that power circuit breaks down from I sections or I sections of protection acts of zero sequence；
Alternatively,
When current failure judgment mode is that decompression starts, if detecting, the voltage on power circuit is less than setting voltage
Value, then determine power failure；
Alternatively,
When current failure judgment mode is to start without stream, if detecting, the voltage on power circuit is less than setting electric current
Value, then determine power failure；
Alternatively,
When current failure judgment mode is that inverse probability starts, power supply line is obtained according to the voltage and current on power circuit
The power signal on road, and judge whether power direction is directed toward power circuit and whether voltage signal is less than setting voltage value, if so,
Then determine power failure.
Optionally, the configuration information further includes：Combined floodgate mode；
Correspondingly, the microprocessor is before being sent to the On-off signal output module for divide-shut brake signal, also
For judging whether to meet the corresponding combined floodgate condition of combined floodgate mode.
When current combined floodgate mode is to be switched fast, obtained according to the voltage on first bus and second bus
Take the frequency difference and difference of first bus and second bus, and comparison know the frequency difference be less than setting frequency difference value and
When the difference is less than predetermined phase difference, determination meets combined floodgate condition；
Alternatively,
When current combined floodgate mode is remnant voltage switch, if the electricity of first bus and second bus is known in judgement
Pressure difference is less than setting pressure difference, then confirms and meet combined floodgate condition；
Alternatively,
When current combined floodgate mode is to switch the same period, according to the voltage signal of first bus and second bus
The phase angle difference of first bus and second bus is obtained, and when phase angle difference meets preset rules, confirmation, which meets, closes a floodgate
Condition.
Optionally, the configuration information further includes：The priority of each power supply operational mode；
Correspondingly, the microprocessor is when being determined with power failure, according to the excellent of each power supply moving model
First grade generates corresponding divide-shut brake information, and controls phase according to the divide-shut brake information by the On-off signal output module
Answer the opening and closing state of breaker.
Optionally, the configuration information further includes：Connect the 5th open circuit on the 5th power circuit of the first, second bus
The working condition of device；
Correspondingly, the microprocessor sends divide-shut brake to the On-off signal output module according to the configuration information
Signal controls the 5th breaker closing or separating brake by the On-off signal output module.
Optionally, the On-off signal output module is also used to when controlling the breaker open operation of trouble power, to institute
It states breaker and carries out locking processing；When the voltage for detecting four power circuits restores normal, closing for breaker is released
Lock signal.
Optionally, the human-machine interface module, is also used to receive the inquiry request artificially inputted, and by the inquiry request
It is sent to the microprocessor, data corresponding with the inquiry request are shown to the display in device by the microprocessor
On.
As shown from the above technical solution, the four power supply fast switching device of one kind that the embodiment of the present invention proposes is able to achieve load four
Power supply quick automatic switching when the power failure of road can further improve power supply reliability compared with prior art.
Detailed description of the invention
The features and advantages of the present invention will be more clearly understood by referring to the accompanying drawings, and attached drawing is schematically without that should manage
Solution is carries out any restrictions to the present invention, in the accompanying drawings：
Fig. 1 shows the structural schematic diagram of four power supply fast switching devices of one embodiment of the invention offer；
Fig. 2 shows the master control logical schematics for four power supply rapid switching devices that one embodiment of the invention provides；
Four power supply rapid switching devices that Fig. 3 shows one embodiment of the invention offer judge the control signal of power failure
Figure；
The control that Fig. 4 shows four power supply rapid switching devices the 5th breaker of combined floodgate of one embodiment of the invention offer is shown
It is intended to.
Specific embodiment
In order to make the object, technical scheme and advantages of the embodiment of the invention clearer, below in conjunction with the embodiment of the present invention
In attached drawing, technical scheme in the embodiment of the invention is clearly and completely described, it is clear that described embodiment is
A part of the embodiments of the present invention, instead of all the embodiments.Based on the embodiments of the present invention, ordinary skill people
Member's every other embodiment obtained without making creative work, shall fall within the protection scope of the present invention.
Fig. 1 shows the structural schematic diagram of four power supply fast switching devices of one embodiment of the invention offer, firstly, referring to Fig. 1
Application scenarios of the invention are illustrated：
The present invention be suitable for four power supplys power supply grid, wherein on the first bus connection there are two power supply (the first power supply and
Third power supply), there are two power supply (second source and the 4th power supplys) for connection on the second bus, and the first bus and the second bus pass through
Power circuit connection.First bus is the first load supplying, and the second bus is the second load supplying.
Wherein, there is at least one breaker on each power circuit.First breaker, to connect the first power supply and first
The breaker of bus；Second breaker, for the breaker for connecting second source and the second bus；Third breaker, for connection the
The breaker of one bus and third power supply；4th breaker, for the breaker for connecting the second bus and the 4th power supply；5th open circuit
Device, for the breaker for connecting the first bus and the second bus.
Then, the present apparatus is described in detail：
Referring to Fig. 1, which includes：Measure voltage & 110, On-off signal output module 120 and micro process
Device 130, wherein：
The measure voltage & 110, for detect connected on the first bus two power supplys power circuit,
The power circuit and the voltage on first bus and second bus of two power supplys connected on two buses, and/or,
The power circuit of four power supplys and connect electric current on the 5th power circuit of first bus and second bus；
It should be noted that referring to Fig. 1, measure voltage & 110 includes：Six road voltage analog channel (PT1-
) and five tunnel current-mode analog quantity channels (CT1-CT5) PT6；
First via voltage analog channel PT1 detects the three-phase voltage of the first power circuit；Second road voltage analog is logical
Road PT2 detects the three-phase voltage of second source route；Third road voltage analog channel PT3, the three of detection third power circuit
Phase voltage；4th road voltage analog channel PT4 detects the three-phase voltage of the 4th power circuit；5th road voltage analog is logical
Road PT5 detects the three-phase voltage of the first bus；6th road voltage analog channel PT6 detects the three-phase voltage of the second bus.
First via current-mode analog quantity channel C T1 detects the three-phase current of the first power circuit；Second tunnel current-mode analog quantity is logical
Road CT2 detects the three-phase current of second source route；Third current-mode analog quantity channel C T3 monitors the three-phase of third power circuit
Electric current；4th current-mode analog quantity channel C T4 monitors the three-phase current of the 4th power circuit；5th current-mode analog quantity channel C T5,
Monitor the three-phase current of the first bus and the second bus contact route.
The On-off signal output module 120, breaker on power circuit and connection for detecting four power supplys
The on-off model of 5th breaker of the first bus and the second bus, and the data that will test are sent to microprocessor 130；
The corresponding breaker open operation of divide-shut brake signal control trouble power sent according to the microprocessor, and synchronously control correspond to it is standby
With the breaker closing of power supply；
The microprocessor 130, for according on five power circuits voltage and or current and each breaker open
The position for the power supply that pass amount signal confirmation is broken down；Divide-shut brake signal is generated according to the position of trouble power, and will be described point
Switching signal is sent to the On-off signal output module.
As it can be seen that the present embodiment is supervised by the working condition to power supply grid median generatrix and power supply line and breaker
It surveys, after the power supply for determining to break down, disconnects trouble unit, and according to the breaker of pre-set priority control corresponding power
It closes a floodgate.
In the present embodiment, described device further includes：Human-machine interface module；
The human-machine interface module is sent to institute for receiving the configuration information artificially inputted, and by the configuration information
State microprocessor 130.It is specific as follows：
Configuration information includes breakdown judge mode, combined floodgate mode, the priority of each power supply operational mode and the 5th power supply
The working condition etc. of the 5th breaker on route；Each power supply operational mode, i.e. the first breaker to the 5th breaker
Divide-shut brake operating status, including dual power supply paired running mode, dual power supply fanout operation mode, single supply paired running mode.
Correspondingly, the content that the microprocessor 130 is used to be configured according to configuration information executes corresponding actions.
Such as：Corresponding divide-shut brake information is generated according to the priority of each power supply moving model, and is opened by described
Measure the opening and closing state that input/output module controls respective circuit breakers according to the divide-shut brake information in pass.Wherein, each power supply operation
The priority of mode can concrete example be：The first breaker of the first power supply is in "on" position, third power supply under normal condition
Third breaker be in gate-dividing state.When the first power failure, firstly, the first breaker open operation of control, then, base
In priority priority acccess control third breaker closing.
The human-machine interface module is also used to receive the inquiry request artificially inputted, and the inquiry request is sent to
The microprocessor is shown data corresponding with the inquiry request on the device's monitor by the microprocessor.Example
Such as：The inquiry of historical data
In order to further improve the stability of power supply, in the present embodiment, On-off signal output module 120 is also used
In when controlling the breaker open operation of trouble power, locking processing is carried out to the breaker.When detecting four power supplys
When the voltage of route restores normal, the block signal of breaker is released.
In the present embodiment, the present apparatus further includes：Communication module 140 and voltage module 150, wherein：
Communication system 140, carry out device between or the communication between device and host computer.Communication system is received from other
The transmission signal of device or main website, passes it to microprocessor system.Communication system sends the transmission signal of microprocessor
To other devices or main website.
Concrete example is：Microprocessor 130 and measure voltage & 110, microprocessor 130 and On-off signal are defeated
Module 120 out, between the interaction or microprocessor 130 and exterior terminal between microprocessor 130 and human-machine interface module
Interaction.
Power module 150, for providing working power for device.
In addition, it is necessary to explanation, power module 150 and four power supply power supply power grids are preferably mutually indepedent, to avoid working as
When breaking down in four power supply power supply power grids, influences the power supply of the present apparatus and cut function fastly.
Fig. 2 shows one embodiment of the invention provide four power supply rapid switching devices master control logical schematic, under
Face is referring to fig. 2 illustrated the control process of the present apparatus：
The first step determines the method for operation and switching side according to five way switch amount input signals and selection closing switch signal
Formula.
Second step, according to six road voltages, five tunnel current-mode analog quantity signals and circuit breaker position, protection act switching value
Signal judges to run whether power supply breaks down.The one or more of judgment mode can be selected according to human-machine interface module, this
Several selections include：Protection starting, decompression start, and no stream starts and inverse probability starts.
Protection starting, i.e. monitoring and protecting action state parameter, route indulges poor, I section of distance or I section of zero sequence when running if normal
Protection act then confirms that power circuit breaks down.Decompression starts, i.e., whether detectable voltage signals are less than setting voltage value, if
It is then to confirm power failure.It is started without stream, i.e., whether sensed current signal is less than setting voltage value, if so, confirmation electricity
It breaks down in source.Inverse probability starts, and obtains power signal according to the electric current of detection, voltage signal, and whether judges power direction
It is directed toward route and whether voltage signal is less than setting voltage value, if so, confirmation power failure.
Third step, the reception received according to the power failure of the judgement, five way switch amount input signals, communication system
Signal carries out logic judgment, and according to the priority of default power supply operational mode, device controls the division of the first to the 5th breaker
Lock state.
When detecting a certain power failure and certain two power supply simultaneously or sequentially failure when, it is immediately that trouble power is corresponding
Breaker open operation carries out locking processing to the breaker when controlling the breaker open operation of trouble power.According to default power supply
The priority of operational mode, device controls the opening and closing state of each breaker, while device carries out the detection of failure immediately and breaks
The control of road device.
4th step, it is no-delay to close a floodgate when device, which issues, closes a floodgate order.Device needs the combined floodgate side according to pre-configuration
Formula is closed a floodgate when detecting voltage, current signal meeting combined floodgate condition.Being pre-configured combined floodgate mode can be according to human-machine interface mouth mold
Block selection is one or more of, and these types selection includes：It is switched fast, same period switching, remnant voltage switch.
It is switched fast, the frequency difference of the first bus and the second bus is obtained according to the voltage signal of the first bus and the second bus
And difference, and when comparison knows that the frequency difference is less than setting frequency difference value and the difference is less than setting phase difference, confirmation meets
Combined floodgate condition.Remnant voltage switch, judges whether the voltage signal of the first bus is less than setting voltage value, closes if so, confirmation meets
Lock condition.Same period switching, the phase angle of the first bus and the second bus is obtained according to the voltage signal of the first bus and the second bus
Difference, and when the phase angle difference meets preset rules, confirmation meets combined floodgate condition.
5th step releases the block signal of breaker when the voltage for detecting four power circuits restores normal.
As it can be seen that the voltage, current signal and killer switch amount of four electric power incoming lines of the present embodiment real-time monitoring and bus
Signal controls breaker in four power supplys normal operation, a certain power failure and when certain two power supply simultaneously or sequentially failure
Automatically it cut-offs, changes grid operation mode, load is made to work the operating status spare in dual power supply.The embodiment of the present invention is four
Power generating facilities and power grids provide quick, reliable, the flexible switching method of one kind and equipment, realize load in four power supply single supply failures
Power supply quick automatic switching with when dual power supply failure, ensure that the power supply reliability under accident condition.
Four power supply rapid switching devices that Fig. 3 shows one embodiment of the invention offer judge the control signal of power failure
Figure, is described in detail judgement power fail condition of the invention referring to Fig. 3：
First power supply, second source, third power supply, the 4th power supply are likely to be failure side power supply, need to disconnect failure
The breaker of side power supply is illustrated for the first breaker of disconnection using the first power supply as failure side power supply, is in other power supplys
Failure side power supply when needing to disconnect other breakers, please refers to the explanation that the first power supply is failure side power supply；
CT in Fig. 3 is current transformer, and PT is voltage transformer, is understood for convenience, actual value and setting value are made by d
For distinguish, such as：Actual value is I, and corresponding setting value is Id；
Human-machine interface module selection judges that the start mode of failure can be protection starting, false tripping starting, decompression starting, nothing
One or more of stream starts and inverse probability starts.When selection judges the start mode of failure using certain, corresponding control
Logic switch S1, S2, S3, S4 closure processed；
Protection starting or false tripping starting, i.e. monitoring switch state parameter, the breaker being closed when running if normal are jumped
Lock then confirms power failure.Decompression starts, i.e., whether detectable voltage signals are less than setting voltage value, if so, confirmation electricity
It breaks down in source.It is started without stream, i.e., whether sensed current signal is less than setting voltage value, if so, confirmation power failure.
Inverse probability start, according to the electric current of detection, voltage signal obtain power signal, and judge power whether be less than setting performance number and
Whether voltage signal is less than setting voltage value, if so, confirmation power failure.
It is described it is preselected judge failure mode for protection start or false tripping start when, according to the switch state parameter
Judge whether the first electric power incoming line breaker tripping situation occurs, if so, confirmation first power failure；
It is described it is preselected judge failure mode for decompression starting when, judge whether the voltage signal of first bus small
In setting voltage value, if so, confirmation first power failure；
It should be noted that the voltage on the first bus is three-phase voltage, it should judge whether three-phase voltage is respectively less than herein
Set voltage value, that is, Ua<Ud and Ub<Ud and Uc<Ud, Ua, Ub, Uc are three-phase voltage, and Ud is setting voltage value；
It is described it is preselected judge failure mode for without stream start when, judge whether the current signal of first inlet wire small
In setting electric current value, if so, confirmation first power failure；
It should be noted that the electric current on the first inlet wire is three-phase current, it should judge whether three-phase current is respectively less than herein
Setting electric current value, that is, Ia<Id and Ib<Id and Ic<Id, Ia, Ib, Ic are three-phase current, and Id is setting electric current value；
It is described it is preselected judge failure mode for inverse probability starting when, according to the current signal of first inlet wire or institute
The voltage signal for stating the first bus obtains power signal, and judges whether the power signal is less than setting performance number and described the
Whether the voltage signal of one bus is less than setting voltage value, if so, confirmation first power failure.
It should be noted that it is three-phase electricity that general enterprises power grid, which uses, therefore power signal should be the power of three-phase,
That is A phase inverse probability, B phase inverse probability, C phase inverse probability, when three is respectively less than and sets performance number, and three-phase voltage Ua, Ub, Uc are
When three-phase voltage is respectively less than setting voltage value Ud, first power failure is confirmed.
It should be noted that model may be configured as in a system there are when a variety of Judging fault modes：Any one
Or the condition of several start modes judges failure when being satisfied.
The control that Fig. 4 shows four power supply rapid switching devices the 5th breaker of combined floodgate of one embodiment of the invention offer is shown
It is intended to, is described in detail referring to control logic of the Fig. 4 to the 5th breaker of combined floodgate of the invention：
As shown in Figure 4, the combined floodgate mode that human-machine interface module selection is pre-configured is including being switched fast, the same period switches, residual voltage
One or more of switching.When selection is using certain combined floodgate mode, corresponding control logic switch S5, S6, S7 closure；
When being pre-configured combined floodgate mode is to be switched fast, first is obtained according to the voltage signal of the first bus and the second bus
The frequency difference and difference of bus and the second bus, and comparison know the frequency difference be less than setting frequency difference value and it is described difference be less than set
When determining phase difference, confirmation meets combined floodgate condition；
When being pre-configured combined floodgate mode is to switch the same period, first is obtained according to the voltage signal of the first bus and the second bus
The phase angle difference of bus and the second bus, and when the phase angle difference meets preset rules, confirmation meets combined floodgate condition；
When being pre-configured combined floodgate mode is remnant voltage switch, the voltage signal U of the first bus is judgedfWhether setting voltage is less than
Value UD3, if so, confirmation meets combined floodgate condition.
Referring to Fig. 4 to when being pre-configured combined floodgate mode is to switch the same period, judge whether the step of meeting combined floodgate condition
It is described in detail：
The phase angle difference of the first bus and the second bus is obtained according to the voltage signal of the first bus and the second bus；
According to formula one, the lead angle θ to close a floodgate is obtained in conjunction with the voltage signal of the first bus；
θ=v*T+c*a*T2Formula one
Wherein, v is the pace of change of sampling instant voltage phase angle, and a is the acceleration of sampling instant voltage phase angle, and T is pre-
The closing time of the busbar breaker of configuration, c are constant；
According to formula two, judge whether phase angle difference meets preset rules in conjunction with the lead angle θ；
Wherein, b is the closing phase angle nargin being pre-configured,For the phase angle difference.
As it can be seen that the voltage, current signal and killer switch amount of four electric power incoming lines of the present embodiment real-time monitoring and bus
Signal controls breaker in four power supplys normal operation, a certain power failure and when certain two power supply simultaneously or sequentially failure
Automatically it cut-offs, changes grid operation mode, load is made to work the operating status spare in dual power supply.The embodiment of the present invention is four
Power generating facilities and power grids provide quick, reliable, the flexible switching method of one kind and equipment, realize load in four power supply single supply failures
Power supply quick automatic switching with when dual power supply failure, ensure that the power supply reliability under accident condition.
It should be noted that in all parts of the device of the invention, according to the function that it to be realized to therein
Component has carried out logical partitioning, and still, the present invention is not only restricted to this, can according to need all parts are repartitioned or
Person's combination.
All parts embodiment of the invention can be implemented in hardware, or to transport on one or more processors
Capable software module is realized, or is implemented in a combination thereof.In the present apparatus, PC is by realizing internet to equipment or device
Long-range control, the step of accurately controlling equipment or device each operation.The present invention is also implemented as executing here
Some or all device or device programs of described method are (for example, computer program and computer program produce
Product).Program of the invention, which is achieved, can store on a computer-readable medium, and the file or document tool that program generates
There is statistics available property, generate data report and cpk report etc., batch testing can be carried out to power amplifier and counts.On it should be noted that
Stating embodiment, illustrate the present invention rather than limit it, and those skilled in the art are not departing from
It can be designed replacement embodiment in the case where attached the scope of the claims.It in the claims, should not will be between bracket
Any reference symbol be configured to limitations on claims.Word "comprising" does not exclude the presence of member not listed in the claims
Part or step.Word "a" or "an" located in front of the element does not exclude the presence of multiple such elements.The present invention can borrow
Help include the hardware of several different elements and be realized by means of properly programmed computer.If listing equipment for drying
Unit claim in, several in these devices, which can be, to be embodied by the same item of hardware.Word first,
Second and the use of third etc. do not indicate any sequence.These words can be construed to title.
Finally it should be noted that：The above embodiments are merely illustrative of the technical solutions of the present invention, rather than its limitations；Although
Present invention has been described in detail with reference to the aforementioned embodiments, those skilled in the art should understand that：It still may be used
To modify the technical solutions described in the foregoing embodiments or equivalent replacement of some of the technical features；
And these are modified or replaceed, technical solution of various embodiments of the present invention that it does not separate the essence of the corresponding technical solution spirit and
Range.
Claims (8)
1. a kind of four power supply fast switching devices, which is characterized in that including：Measure voltage &, On-off signal output module
And microprocessor；
The measure voltage &, for detecting power circuit, the second bus of connect on the first bus two power supplys
The power circuit and the voltage on first bus and second bus of two power supplys of upper connection, and/or, four electricity
Electric current on the power circuit and connection first bus in source and the 5th power circuit of second bus；
The On-off signal output module, for by the first, second bus of breaker and connection on four power circuits
The on-off model of the 5th breaker is sent to microprocessor on 5th power circuit；The division sent according to the microprocessor
Lock signal controls the corresponding breaker open operation of trouble power, and synchronously control corresponds to the breaker closing of backup power source；
The microprocessor, for being believed according to the switching value of voltage and or current and each breaker on five power circuits
The position of power supply that number confirmation is broken down；Divide-shut brake signal is generated according to the position of trouble power, and the divide-shut brake is believed
Number it is sent to the On-off signal output module.
2. the apparatus according to claim 1, which is characterized in that described device further includes：Human-machine interface module；
The human-machine interface module for receiving the configuration information artificially inputted, and the configuration information is sent to described micro-
Processor.
3. the apparatus of claim 2, which is characterized in that the configuration information includes：Breakdown judge mode；
Correspondingly, the microprocessor, for when current failure judgment mode is protection starting, route to indulge gap if detecting
From I sections or I sections of protection acts of zero sequence, then determine that power circuit breaks down；
Alternatively,
When current failure judgment mode is that decompression starts, if detecting, the voltage on power circuit is less than setting voltage value,
Determine power failure；
Alternatively,
When current failure judgment mode is to start without stream, if detecting, the voltage on power circuit is less than setting electric current value,
Determine power failure；
Alternatively,
When current failure judgment mode is that inverse probability starts, power circuit is obtained according to the voltage and current on power circuit
Power signal, and judge whether power direction is directed toward power circuit and whether voltage signal is less than setting voltage value, if so, sentencing
Determine power failure.
4. the apparatus of claim 2, which is characterized in that the configuration information further includes：Combined floodgate mode；
Correspondingly, the microprocessor is also used to before divide-shut brake signal is sent to the On-off signal output module
Judge whether to meet the corresponding combined floodgate condition of combined floodgate mode.
When current combined floodgate mode is to be switched fast, institute is obtained according to the voltage on first bus and second bus
It states the frequency difference and difference of the first bus and second bus, and knows that the frequency difference is less than setting frequency difference value and described in comparison
When difference is less than predetermined phase difference, determination meets combined floodgate condition；
Alternatively,
When current combined floodgate mode is remnant voltage switch, if the voltage difference of first bus and second bus is known in judgement
Less than setting pressure difference, then confirms and meet combined floodgate condition；
Alternatively,
When current combined floodgate mode is to switch the same period, obtained according to the voltage signal of first bus and second bus
The phase angle difference of first bus and second bus, and when phase angle difference meets preset rules, confirmation meets combined floodgate condition.
5. the apparatus of claim 2, which is characterized in that the configuration information further includes：Each power supply operational mode
Priority；
Correspondingly, the microprocessor is when being determined with power failure, according to the priority of each power supply moving model
Corresponding divide-shut brake information is generated, and corresponding disconnected according to divide-shut brake information control by the On-off signal output module
The opening and closing state of road device.
6. the apparatus of claim 2, which is characterized in that the configuration information further includes：Connect the first, second bus
The 5th power circuit on the 5th breaker working condition；
Correspondingly, the microprocessor sends divide-shut brake letter to the On-off signal output module according to the configuration information
Number, the 5th breaker closing or separating brake are controlled by the On-off signal output module.
7. device according to claim 1-6, which is characterized in that the On-off signal output module is also used
In when controlling the breaker open operation of trouble power, locking processing is carried out to the breaker；When detecting four power supplys
When the voltage of route restores normal, the block signal of breaker is released.
8. the apparatus of claim 2, which is characterized in that the human-machine interface module is also used to receive artificial input
Inquiry request, and the inquiry request is sent to the microprocessor, will be with the inquiry request by the microprocessor
Corresponding data are shown on the device's monitor.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
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| CN201710334030.XA CN108879936A (en) | 2017-05-12 | 2017-05-12 | A kind of four power supply fast switching devices |
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| Application Number | Priority Date | Filing Date | Title |
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| CN201710334030.XA CN108879936A (en) | 2017-05-12 | 2017-05-12 | A kind of four power supply fast switching devices |
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| CN108879936A true CN108879936A (en) | 2018-11-23 |
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| CN201710334030.XA Pending CN108879936A (en) | 2017-05-12 | 2017-05-12 | A kind of four power supply fast switching devices |
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Application publication date: 20181123 |