CN110224491A - Monitoring device, monitoring method and the monitoring system of Distributed power net automatic switch - Google Patents
Monitoring device, monitoring method and the monitoring system of Distributed power net automatic switch Download PDFInfo
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- CN110224491A CN110224491A CN201910576220.1A CN201910576220A CN110224491A CN 110224491 A CN110224491 A CN 110224491A CN 201910576220 A CN201910576220 A CN 201910576220A CN 110224491 A CN110224491 A CN 110224491A
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- 238000012806 monitoring device Methods 0.000 title claims abstract description 90
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- 238000004891 communication Methods 0.000 claims abstract description 21
- 238000009826 distribution Methods 0.000 claims abstract description 14
- 238000002955 isolation Methods 0.000 claims description 18
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- 238000009434 installation Methods 0.000 abstract description 16
- 238000012423 maintenance Methods 0.000 abstract description 15
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- 230000006870 function Effects 0.000 description 7
- 230000005611 electricity Effects 0.000 description 5
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- 238000003825 pressing Methods 0.000 description 5
- 238000004146 energy storage Methods 0.000 description 4
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Classifications
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02H—EMERGENCY PROTECTIVE CIRCUIT ARRANGEMENTS
- H02H7/00—Emergency protective circuit arrangements specially adapted for specific types of electric machines or apparatus or for sectionalised protection of cable or line systems, and effecting automatic switching in the event of an undesired change from normal working conditions
- H02H7/26—Sectionalised protection of cable or line systems, e.g. for disconnecting a section on which a short-circuit, earth fault, or arc discharge has occured
- H02H7/261—Sectionalised protection of cable or line systems, e.g. for disconnecting a section on which a short-circuit, earth fault, or arc discharge has occured involving signal transmission between at least two stations
- H02H7/262—Sectionalised protection of cable or line systems, e.g. for disconnecting a section on which a short-circuit, earth fault, or arc discharge has occured involving signal transmission between at least two stations involving transmissions of switching or blocking orders
-
- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02H—EMERGENCY PROTECTIVE CIRCUIT ARRANGEMENTS
- H02H7/00—Emergency protective circuit arrangements specially adapted for specific types of electric machines or apparatus or for sectionalised protection of cable or line systems, and effecting automatic switching in the event of an undesired change from normal working conditions
- H02H7/26—Sectionalised protection of cable or line systems, e.g. for disconnecting a section on which a short-circuit, earth fault, or arc discharge has occured
- H02H7/261—Sectionalised protection of cable or line systems, e.g. for disconnecting a section on which a short-circuit, earth fault, or arc discharge has occured involving signal transmission between at least two stations
- H02H7/263—Sectionalised protection of cable or line systems, e.g. for disconnecting a section on which a short-circuit, earth fault, or arc discharge has occured involving signal transmission between at least two stations involving transmissions of measured values
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- H02J13/0075—
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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
- Y02B90/00—Enabling technologies or technologies with a potential or indirect contribution to GHG emissions mitigation
- Y02B90/20—Smart grids as enabling technology in buildings sector
-
- 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
- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E60/00—Enabling technologies; Technologies with a potential or indirect contribution to GHG emissions mitigation
-
- 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
- Y04S10/00—Systems supporting electrical power generation, transmission or distribution
- Y04S10/20—Systems supporting electrical power generation, transmission or distribution using protection elements, arrangements or systems
-
- 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
- Y04S40/00—Systems for electrical power generation, transmission, distribution or end-user application management characterised by the use of communication or information technologies, or communication or information technology specific aspects supporting them
- Y04S40/12—Systems for electrical power generation, transmission, distribution or end-user application management characterised by the use of communication or information technologies, or communication or information technology specific aspects supporting them characterised by data transport means between the monitoring, controlling or managing units and monitored, controlled or operated electrical equipment
- Y04S40/126—Systems for electrical power generation, transmission, distribution or end-user application management characterised by the use of communication or information technologies, or communication or information technology specific aspects supporting them characterised by data transport means between the monitoring, controlling or managing units and monitored, controlled or operated electrical equipment using wireless data transmission
Abstract
The invention discloses a kind of monitoring devices of Distributed power net automatic switch, in addition to circuit parameter Acquisition Circuit, switching value input circuit, communication interface, control loop, outputting circuit for relay, the signal acquisition circuit being connect with circuit parameter Acquisition Circuit, installation's power source, and respectively with circuit parameter Acquisition Circuit, switching value input circuit, communication interface, control loop, relay output loop, outside the controller that signal acquisition circuit is connected with installation's power source, it further include power directional element and the first display device, wherein, power directional element is set between circuit parameter Acquisition Circuit and controller, the current direction information for flowing through local-monitoring device can be passed into controller, controller shows current direction in the first display device, facilitate the fault point in the positioning distributed power distribution network of operation maintenance personnel.The invention also discloses the monitoring methods and monitoring system of a kind of Distributed power net automatic switch, have above-mentioned beneficial effect.
Description
Technical field
The present invention relates to distribution network automated technical fields, more particularly to a kind of prison of Distributed power net automatic switch
Control device, monitoring method and monitoring system.
Background technique
With the raising that the continuous development and user of distribution network automated technology require power supply reliability, distribution automation
Construction and operation be particularly important, lay a good foundation for Fault Isolation and fast quick-recovery non-faulting block supply.
Feeder automation is distribution network automated important component.It realizes feeder automation, needs reasonably to match
Electric network composition has the condition of ring network power supply；The operating mechanism switched in each loop networks switch, on-load switch and street power distribution station must
There must be remote operation；Must have reliable switch operation device power supply and protection supervisory equipment in loop-network switch cabinet
(FTU), the equipment power supply of communication equipment；Has communication system that is reliable, not being affected by the external environment.In normal shape
Under state, feed line automatization system monitors the state and feeder current, voltage condition of feeder line section switch and interconnection switch in real time, real
A distant place for existing line switching or on the spot switch closing and switch opening operation.Failure logging, and automatic discrimination and isolation feedback are obtained in failure
Line fault section rapidly restores electricity to non-faulting region.Wherein fault location, isolation and automatic restore can to improve power supply
It is significant by property and the power off time for shortening non-faulting area.
Existing failure removal logic is to start logic judgment (the logic judgment time after automatic switch itself detects failure
It is recommended that 2s), if the automatic switch of faults itself and two sides has side fault-free signal, fault point side behind is then held
The operation of row failure removal.Existing Fault Isolation logic is itself fault-free of automatic Switching, and the automatic switch of two sides only has
When the faulty electric current in side, positioning failure then executes Fault Isolation operation on front side of it.
The structure of power distribution network is changed however as the access of distributed generation resource, each power supply point is mutually indepedent in system, from
Radial network is transitioned into the network that customer charge is directly connected with the dotted power supply of distribution, makes fault location and treatment process more
Add complexity.
Fig. 1 is a kind of " 2-1 " Single-ring network Connection Mode schematic diagram of Distributed power net；Fig. 2 is in the prior art point
The action schematic diagram of cloth power distribution network automatic switch.As shown in Figure 1, CB1, CB2 are by taking " 2-1 " Single-ring network Connection Mode as an example
Transformer substation side power supply, FB1 are distributed generation resource, and K1 to K8, K21 to K26 is automatic switch.As shown in Fig. 2, when failure occurs
When between K4 and K5, since K1 to K5 experiences fault current, according to the intelligent distributed logic of slow-action type, it should be moved by K5
Make excision failure, isolated fault is acted by K6, is closed a floodgate by K8 and turn power supply.But due to the presence of distributed generation resource FB1, lead to K5
Current direction between K6 is different from conventional electrical distribution flow direction off the net, cause K4 and K5 obtain mistake localization of fault or
Logical miss cannot obtain localization of fault as a result, leading to not the failure removal applied and Fault Isolation operation.And work as
After line fault tripping, operation maintenance personnel is also difficult to determine the position of fault point.
The specific location of fault point, mitigates O&M in the confirmation distributed power grid for how alloing operation maintenance personnel more convenient
The operating pressure of personnel accelerates the reparation to Distributed power net failure, is that those skilled in the art need the technology solved to ask
Topic.
Summary of the invention
The object of the present invention is to provide a kind of monitoring device of Distributed power net automatic switch, monitoring method and monitoring systems
System, the specific location for confirming fault point in distributed power grid for keeping operation maintenance personnel more convenient, mitigates operation maintenance personnel
Operating pressure, accelerate reparation to Distributed power net failure.
In order to solve the above technical problems, the present invention provides a kind of monitoring device of Distributed power net automatic switch, including
Circuit parameter Acquisition Circuit, switching value input circuit, communication interface, control loop, outputting circuit for relay are joined with the circuit
Number Acquisition Circuits connection signal acquisition circuit, installation's power source, and respectively with the circuit parameter Acquisition Circuit, the switch
Measure input circuit, the communication interface, the control loop, the relay output loop, the signal acquisition circuit and institute
State the controller of installation's power source connection, the circuit parameter that the controller is used to acquire according to the circuit parameter Acquisition Circuit with
The on-off model of the switching value input circuit input controls the control loop and the outputting circuit for relay executes guarantor
Shield movement, further includes:
First input end is with the protective current acquisition module that is connected in the circuit parameter Acquisition Circuit for acquiring
The first relay connection of quick-break electric current, the second input terminal are adopted with the zero-sequence current being connected in the circuit parameter Acquisition Circuit
The second relay connection for acquiring zero-sequence current and overload value of collection module, output end are connect with the controller
Power directional element, and the first display device is connect with the controller；
Wherein, the controller flows through the electric current of local-monitoring device according to the judgement of the output valve of the power directional element
Direction, and control first display device and show the sense of current.
Optionally, the power directional element is specially rectification type power direction relay.
Optionally, first display device is specially touch screen.
It optionally, further include the first indicator light circuit and the second indicator light circuit being connect with the controller；
The controller is preset forward current in the electric current for flowing through monitoring device and the forward current is greater than
The indicator light controlled in first indicator light circuit when the first preset value lights；
The controller is preset reverse current in the electric current for flowing through monitoring device and the reverse current is greater than
The indicator light controlled in second indicator light circuit when the second preset value lights.
Optionally, further include automatic being opened for show by what the local-monitoring device was protected of connecting with the controller
Second display device of the status information of pass.
It optionally, further include the wireless communicator being connect with the controller.
Optionally, the wireless communicator is specifically Wi-Fi communicator.
In order to solve the above technical problems, the present invention also provides a kind of monitoring method of Distributed power net automatic switch, base
The monitoring device of the automatic switch of the Distributed power net described in above-mentioned any one, comprising:
Controller analyzes the side of the fault current of local-monitoring device when the backbone for detecting power distribution network breaks down
To, and the monitoring device of the automatic switch adjacent with two sides exchanges detection information；
When the fault current that the controller analyzes to obtain the local-monitoring device is preset forward current and described
The two sides of local-monitoring device only have there are when fault current in the automatic switch of side, and fault point is in the local
The rear side of monitoring device simultaneously controls execution failure removal operation；
When the fault current that the controller analyzes to obtain the local-monitoring device is preset reverse current and described
The two sides of local-monitoring device only have in the automatic switch of side that there are when fault current, position the fault point described
The front side of local-monitoring device simultaneously executes Fault Isolation operation.
Optionally, further includes:
The controller is by the direction of the fault current of the local-monitoring device, the detection of the adjacent automatic switch
The result of information, the positioning result of the fault point and execution protection act is sent to remote scheduling platform.
In order to solve the above technical problems, the present invention also provides a kind of monitoring system of Distributed power net automatic switch, packet
Include the monitoring device of the automatic switch of Distributed power net described in above-mentioned any one, further includes:
The remote scheduling platform being communicatively coupled with the controller of the monitoring device, for being obtained at the controller
The monitoring information of the monitoring device is simultaneously shown.
The monitoring device of Distributed power net automatic switch provided by the present invention is opened in addition to circuit parameter Acquisition Circuit
Pass amount input circuit, communication interface, control loop, outputting circuit for relay, the signal connecting with circuit parameter Acquisition Circuit are adopted
Collector, installation's power source, and respectively with circuit parameter Acquisition Circuit, switching value input circuit, communication interface, control loop,
It further include power directional element and first outside the controller that relay output loop, signal acquisition circuit and installation's power source connect
Display device, wherein the first input end of power directional element is connected to the acquisition of the protective current in circuit parameter Acquisition Circuit
The first relay connection for acquiring quick-break electric current of module, the second input terminal and is connected in circuit parameter Acquisition Circuit
The second relay connection for acquiring zero-sequence current and overload value of zero-sequence current acquisition module, output end and controller
Connection, the first display device are connect with controller, and controller flows through local monitor according to the judgement of the output valve of power directional element
The sense of current of device, and control the first display device and show sense of current.By the way that power directional element is connected and electricity
Between road parameter acquisition circuit and controller, the sense of current for flowing through local-monitoring device, controller control are provided to controller
System shows sense of current in the first display device, facilitates operation maintenance personnel according to sense of current in Distributed power net
Fault point fast and accurately positioned, therefore compared with the prior art, which can make operation maintenance personnel more square
Just the specific location for determining feeder fault point, alleviates the operating pressure of operation maintenance personnel, accelerates to the event of Distributed power net
The reparation of barrier.The present invention also provides the monitoring methods and monitoring system of a kind of Distributed power net automatic switch, have with above-mentioned
Beneficial effect, details are not described herein.
Detailed description of the invention
It, below will be to embodiment or existing for the clearer technical solution for illustrating the embodiment of the present invention or the prior art
Attached drawing needed in technical description is briefly described, it should be apparent that, the accompanying drawings in the following description is only this hair
Bright some embodiments for those of ordinary skill in the art without creative efforts, can be with root
Other attached drawings are obtained according to these attached drawings.
Fig. 1 is a kind of " 2-1 " Single-ring network Connection Mode schematic diagram of Distributed power net；
Fig. 2 is the action schematic diagram of Distributed power net in the prior art automatic switch；
Fig. 3 is a kind of structural representation of the monitoring device of Distributed power net automatic switch provided in an embodiment of the present invention
Figure；
Fig. 4 (a) is a kind of circuit diagram of power directional element provided in an embodiment of the present invention；
Fig. 4 (b) is the circuit diagram in the executive component circuit in power directional element shown in Fig. 4 (a)；
Fig. 4 (c) is a kind of 90 ° of mode of connection schematic diagrams of power directional element provided in an embodiment of the present invention；
Fig. 5 is a kind of panel signal of the monitoring device of Distributed power net automatic switch provided in an embodiment of the present invention
Figure；
Fig. 6 is the panel signal of the monitoring device of another Distributed power net automatic switch provided in an embodiment of the present invention
Figure；
Fig. 7 is display schematic diagram of the embodiment of the present invention to fault scenes shown in Fig. 2.
Specific embodiment
Core of the invention is to provide monitoring device, monitoring method and the monitoring system of a kind of Distributed power net automatic switch
System, the specific location for confirming fault point in distributed power grid for keeping operation maintenance personnel more convenient, mitigates operation maintenance personnel
Operating pressure, accelerate reparation to Distributed power net failure.
Following will be combined with the drawings in the embodiments of the present invention, and technical solution in the embodiment of the present invention carries out clear, complete
Site preparation description, it is clear that described embodiments are only a part of the embodiments of the present invention, instead of all the embodiments.It is based on
Embodiment in the present invention, it is obtained by those of ordinary skill in the art without making creative efforts every other
Embodiment shall fall within the protection scope of the present invention.
Fig. 3 is a kind of structural representation of the monitoring device of Distributed power net automatic switch provided in an embodiment of the present invention
Figure；Fig. 4 (a) is a kind of circuit diagram of power directional element provided in an embodiment of the present invention；Fig. 4 (b) is function shown in Fig. 4 (a)
The circuit diagram in the executive component circuit in rate directional element；Fig. 4 (c) is a kind of power directional element provided in an embodiment of the present invention
90 ° of mode of connection schematic diagrams；Fig. 5 is a kind of monitoring device of Distributed power net automatic switch provided in an embodiment of the present invention
Panel schematic diagram；Fig. 6 is the face of the monitoring device of another Distributed power net automatic switch provided in an embodiment of the present invention
Plate schematic diagram.
As shown in figure 3, the monitoring device of Distributed power net automatic switch provided in an embodiment of the present invention includes circuit ginseng
Number Acquisition Circuit, switching value input circuit, communication interface, control loop, outputting circuit for relay are acquired with the circuit parameter
The signal acquisition circuit of circuit connection, installation's power source, and respectively with circuit parameter Acquisition Circuit, switching value input circuit, logical
The controller that letter interface, control loop, relay output loop, signal acquisition circuit are connected with installation's power source, controller are used for
It is controlled back according to the on-off model control of the circuit parameter of circuit parameter Acquisition Circuit acquisition and switching value input circuit input
Road and outputting circuit for relay execute protection act, further includes:
First input end is with the protective current acquisition module that is connected in circuit parameter Acquisition Circuit for acquiring quick-break
The first relay SJ connection, the second input terminal and the zero-sequence current acquisition module being connected in circuit parameter Acquisition Circuit of electric current
For acquiring zero-sequence current and the second relay YJ connection of overload value, output end power direction connected to the controller
Element, and the first display device is connect with controller；
Wherein, controller flows through the sense of current of local-monitoring device according to the judgement of the output valve of power directional element,
And it controls the first display device and shows the sense of current.
In specific implementation, circuit parameter Acquisition Circuit includes the busbar voltage connecting with busbar voltage YMc, YMb, YMc
Acquisition module, the measurement current acquisition module being connect with triple line, protective current acquisition module, zero-sequence current acquisition module,
Middle quick-break overflow means are connect with protective current Acquisition Circuit, one end output the first relay of connection of quick-break overflow means
SJ, the second relay TJ, the second relay TJ of other end output connection are also controlled by distant jump signal.
The amount of opening the light input circuit includes distant place control signal end, spring energy-storage signal terminal, handcart activating terminal, handcart
Testing terminal, remote signalling terminal 5~12, remote signalling common end etc., and distant place control signal end, spring energy-storage signal terminal, handcart
Activating terminal, handcart testing terminal, remote signalling terminal 5~12 are connect with the anode of 24V installation's power source, remote signalling common end and 24V
The cathode of installation's power source connects.
Communication interface can use RS485 communication interface.
Control loop includes control device power supply (+, -) terminal, tripping input terminal, tripping outlet terminal, input of closing a floodgate
Terminal, anti-jump release-terminal, the outlet terminal that closes a floodgate jump position monitoring terminal, coincidence monitoring terminal, and relay output loop includes
Trip output terminal, combined floodgate output terminal and logic tripping terminal.
Wherein, control device power positive cathode is separately connected installation's power source end+KM and-KM, and tripping input terminal trips out
It is connect with switch TQ between mouth terminal and between the tripping output terminal both ends of relay output loop, while defeated tripping
Entering on the circuit of terminal further includes hand BRKR Breaker, to control trip operation；Combined floodgate input terminal, close a floodgate outlet terminal between with
And it is connect with switch HQ between the combined floodgate terminal both ends of relay output loop, while on the circuit of combined floodgate input terminal also
Including hand combination switch, to control feed motion.
Signal acquisition circuit includes trouble-signal (SJ) Acquisition Circuit, anticipating signal (YJ) Acquisition Circuit, plant failure
(GZJ) Acquisition Circuit, involution input (+, -) circuit etc., in trouble-signal (SJ) Acquisition Circuit, anticipating signal (YJ) acquisition electricity
It is also connected at road, plant failure (GZJ) Acquisition Circuit including signal power source, single-phase electric energy meter (DD), high-voltage circuitbreaker (DL)
Circuit, specifically as shown in Figure 1.
The connection of installation's power source is as shown in Figure 3.
In addition to said elements, the monitoring device of Distributed power net automatic switch provided in an embodiment of the present invention further includes function
Rate directional element and the first display device, controller flow through the event of local-monitoring device by the output judgement of power directional element
Hinder sense of current, the foundation as fault point.In embodiments of the present invention, with reference to Distributed power net shown in FIG. 1
Feeder line structure, using the electric current flowed out from power supply CB1 as forward current, to flow to the electric current of power supply CB1 as reverse current.
Power directional element is also referred to as power direction relay, is broadly divided into amplitude com parison class and phase bit comparison class two by principle
Kind.Wherein, phase bit comparison class judges that electric current is that positive foundation is bus → route including current direction and voltage is bus
It is on the contrary then indicate that electric current is reversed higher than two kinds of the earth.
Power directional element can use rectification type power direction relay, and structure such as Fig. 4 (a) and Fig. 4 (b) are shown,
Including voltage forming circuit, comparison loop and executive component, using shown in the 90 ° of mode of connection such as Fig. 4 (c), i.e., three-phase symmetrical and
Power factorIn the case where,In advanceThe mode of connection, parameter is as shown in the table:
1 power directional element parameter list of table
Wherein, voltage forming circuit is made of DKB, YB, and resistance R1 and R2 are for eliminating shunt running, adjustment balance, capacitor C1
For forming resonance with the excitation reactance of YB, make advanced 90 °, memory effect is used for deadband eliminating, and memory time is tens millis
Second.Comparison loop is made of semiconductor rectifier bridge.Executive component is polar relay KP, referring to label " * ", when electric current is from the end *
When inflow, polar relay KPMovement, it is on the contrary then motionless.
Phase voltageAnd phase currentIt is converted to by converterWork electricity is obtained using series connection
PressureBrake voltageEnter circulation than width circuit, by polarizing through over commutation
Relay KPIt executes.Polar relay KPOperation equation are as follows:
Using this kind of power directional element, directionality current protection (the predominantly positive direction three-phase of the phase fault of execution
Symmetrical short-circuit protection) when, if withOn the basis of, withFor, the section of phase fault protection is [- 90 ° of-α ,+90 ° of-α],
In, α is the angle of voltage leading current, generally takes 45 °.ThenWithAngle be [- 135 °, 45 °].Zero-sequence voltage injection
Middle principle is similar with phase current direction protection,For residual voltage U0,For zero-sequence current I0, in general small current neutral grounding
90 ° of the advanced residual voltage of zero-sequence current when system is normal, when failure 90 ° of residual voltage after zero-sequence current, so its active region
Between generally [180 °, 360 °].110 ° of the advanced residual voltage of zero-sequence current when heavy current grounding system failure acts section one
As be [15 °, 195 °] Zuo You.
Then for the embodiment of the present invention, power direction section (the zero-sequence current I of zero-sequence current0With residual voltage U0's
Angle) are as follows: [0 °, 180 °] dir=1, [180 °, 360 °] dir=2；Three-phase current takes 45 ° of fineness angle, power direction section (
WithWithWith) are as follows: [45 °, 225 °] dir=1, [225 °, 45 °] dir=2.Wherein, dir=1,2
Indicate direction of tide, it is related with the installation direction of current transformer, general mounting means be using ring network cabinet bus bar side as polar end,
The other side is non-polar end.
Optionally, the first display device can use touch screen.
As shown in figure 5, the panel effect of the monitoring device of Distributed power net automatic switch provided in an embodiment of the present invention
Signal is as shown in figure 5, in addition to nameplate, for showing the display window of A phase current, B phase current, C phase current, the selection of voltage and current type
Knob, condensation controller, luminous lamp switch, energy storage indicator light, quartile indicator light, coincidence indicator light, signal source select knob
(OK), divide-shut brake selection knob (1SA), trip protection output clamping (LP1) are protected combined floodgate output clamping (LP2), and separating brake is remotely controlled
Output clamping (LP3) is remotely controlled combined floodgate output clamping (LP4), and reclosing function puts into pressing plate (LP5), and synchronization function puts into pressing plate
It (LP6) outside, further include the first display device, wherein can show such as " positive fault current I >=828A " or " reverse fault electric current
I >=828A " printed words.
Wherein, different colors is arranged in the indicator light of different function, as energy storage indicator light is set as yellow, quartile indicator light
It is set as green, coincidence indicator light is set as red；Different colors is arranged in the pressing plate of different function, if output clamping is using red
Color, function pressing plate use yellow；Connection sheet screw tightening formula pressing plate, open end should be mounted in top.
Further, each switch, knob should configure plastic lid with false-touch prevention.
Optionally, the monitoring device of Distributed power net automatic switch can also include the first instruction connected to the controller
Circuit for lamp and the second indicator light circuit；
Controller is when the electric current for flowing through monitoring device is preset forward current and forward current is greater than the first preset value
The indicator light L1 controlled in the first indicator light circuit is lighted；
Controller is when the electric current for flowing through monitoring device is preset reverse current and reverse current is greater than the second preset value
The indicator light L2 controlled in the second indicator light circuit is lighted.
The panel effect of the monitoring device of the first indicator light circuit and the second indicator light circuit is increased as shown in fig. 6, can
Positive fault current indicator light and reverse fault alternator indicator is arranged side by side with other indicator lights.
Optionally, the monitoring device of Distributed power net automatic switch can also include connected to the controller for showing
Second display device of the status information of the automatic switch of monitored unit protection.Wherein, the status information of automatic switch includes
" failure removal success/failure ", " Fault Isolation success/failure ", " communication abnormality ", " tripping " etc..
In order to which more significantly prompt operation maintenance personnel, the monitoring device of Distributed power net automatic switch can also include and control
The buzzer circuit of device connection processed；
The buzzer that controller is controlled when flowing through fault current in local protective device in buzzer circuit is alarmed.
Protection measure and control unit provided in an embodiment of the present invention is fixed in secondary small chamber cabinet door using installation by adhering mode,
Connect by Ethernet or RS485 bus with comprehensive control communication unit, correspondence should comprehensive control communication unit it is reserved 2 and
The above RJ45 network interface.
Protection supervisory equipment message provided in an embodiment of the present invention requires to include:
Sequence of events recording should classify, and be divided into equipment fault journal and automation equipment failure journal；
The intelligent distributed signal that protection supervisory equipment receives should be used as SOE record and save, as adjacent switch detects
Fault Isolation signal, the adjacent switch that failure removal signal, the adjacent switch that signal, the adjacent switch of fault current are sent are sent
Tripping signal, this Switch Communication fault-signal for sending etc.；
Dither signal should filter in sequence of events recording.
The monitoring device of Distributed power net automatic switch provided by the present invention is opened in addition to circuit parameter Acquisition Circuit
Pass amount input circuit, communication interface, control loop, outputting circuit for relay, the signal connecting with circuit parameter Acquisition Circuit are adopted
Collector, installation's power source, and respectively with circuit parameter Acquisition Circuit, switching value input circuit, communication interface, control loop,
It further include power directional element and first outside the controller that relay output loop, signal acquisition circuit and installation's power source connect
Display device, wherein the first input end of power directional element is connected to the acquisition of the protective current in circuit parameter Acquisition Circuit
The first relay connection for acquiring quick-break electric current of module, the second input terminal and is connected in circuit parameter Acquisition Circuit
The second relay connection for acquiring zero-sequence current and overload value of zero-sequence current acquisition module, output end and controller
Connection, the first display device are connect with controller, and controller flows through local monitor according to the judgement of the output valve of power directional element
The sense of current of device, and control the first display device and show sense of current.By the way that power directional element is connected and electricity
Between road parameter acquisition circuit and controller, the sense of current for flowing through local-monitoring device, controller control are provided to controller
System shows sense of current in the first display device, facilitates operation maintenance personnel according to sense of current in Distributed power net
Fault point fast and accurately positioned, therefore compared with the prior art, which can make operation maintenance personnel more square
Just the specific location for determining feeder fault point, alleviates the operating pressure of operation maintenance personnel, accelerates to the event of Distributed power net
The reparation of barrier.
On the basis of the above embodiments, in another embodiment, the monitoring device that Distributed power net is automatically switched is also
It may include wireless communicator connected to the controller.
In specific implementation, wireless communicator can specifically use Wi-Fi communicator or GPRS communicator.
In addition, the monitoring device of Distributed power net automatic switch can also include third indicator light connected to the controller
Circuit, the 4th indicator light circuit and the 5th indicator light circuit；
Indicator light of the controller when corresponding automatic switch breaks down excision failure in control third indicator light circuit
It lights, the indicator light when automatic switch breaks down isolation failure in the 4th indicator light circuit of control lights, and is being automatically switched
Indicator light when there is communication abnormality in the 4th indicator light circuit of control lights.
The corresponding each embodiment of monitoring device of Distributed power net automatic switch as detailed above, on this basis,
The invention also discloses the monitoring systems being automatically switched with the Distributed power net for including above-mentioned apparatus.
Other than the monitoring device of Distributed power net provided by the above embodiment automatic switch, the embodiment of the present invention is provided
Distributed power net automatic switch monitoring system further include:
The remote scheduling platform being communicatively coupled with the controller of monitoring device, for obtaining monitoring device at controller
Monitoring information and carry out display
The corresponding each embodiment of monitoring device of Distributed power net automatic switch as detailed above, on this basis,
The invention also discloses the monitoring methods of Distributed power net corresponding with above-mentioned apparatus automatic switch.
The monitoring device of the Distributed power net automatic switch provided based on the above embodiment, Distributed power net are opened automatically
The monitoring method of pass includes:
Controller analyzes the side of the fault current of local-monitoring device when the backbone for detecting power distribution network breaks down
To, and the monitoring device of the automatic switch adjacent with two sides exchanges detection information；
When the fault current that controller is analyzed to obtain local-monitoring device is preset forward current and local-monitoring device
Two sides only have in the automatic switch of side there are when fault current, rear side and control of the fault point in local-monitoring device
Execute failure removal operation；
When the fault current that controller is analyzed to obtain local-monitoring device is preset reverse current and local-monitoring device
Two sides only have in the automatic switch of side there are when fault current, front side and execution of the fault point in local-monitoring device
Fault Isolation operation.
Further, the monitoring method of Distributed power net automatic switch can also include
Controller is by the direction of the fault current of local-monitoring device, the detection information of adjacent automatic switch, fault point
Positioning result and execute protection act result be sent to remote scheduling platform.
In specific implementation, it is obtained in the corresponding automatic switch of local-monitoring device when controller by analyzing circuit parameter
When flowing through fault current, start logic judgment, if faults itself electric current is forward direction, and two sides have side to be automatically switched the event flowed through
When to hinder electric current be reversed, if fault current is reversed switch side behind, fault point side behind, if sentencing in logic
Meet " switch is in coincidence " and the exit conditions such as " decompression " in the disconnected time, then capable of emitting trip signal；Wait the Tdz4 time
(100ms is the switch motion time), if without tripping set failure removal mark.
Alternatively, itself detecting fault initiating logic judgment, if faults itself electric current is forward direction, and two sides only have side certainly
It is dynamic when switching faulty electric current, then fault point side behind, if meet within the logic judgment time " switch is in coincidence " and
Exit conditions such as " decompressions ", then capable of emitting trip signal；Tdz4 time (100ms is the switch motion time) is waited, if without tripping
Set failure removal mark.
It is reversely (power distribution network of distribution-free formula power switch to be adapted to if positive), and two sides only have if faults itself electric current
When there is a faulty electric current in side, positioning failure is on front side of it and starts logic judgment；When within the logic judgment time itself
From no pressure is pressed onto, coincidence is switched, then capable of emitting trip signal；Tdz4 time (100ms is the switch motion time) is waited, if nothing
" Fault Isolation success " flag bit is set in tripping.
After failure removal or Fault Isolation success, monitoring device send " failure removal " or " Fault Isolation success " signal to
Main website；After Fault Isolation success, monitoring device should also issue " Fault Isolation success " signal to interconnection switch.
Fig. 7 is display schematic diagram of the embodiment of the present invention to fault scenes shown in Fig. 2.
As shown in fig. 7, using the monitoring device and monitoring method of Distributed power net of embodiment of the present invention automatic switch, K4
Itself detect fault initiating logic judgment, faults itself electric current is forward direction, and two sides only have the side K5 fault current be it is reversed,
And fault current is reversed switch side behind, then fault point side behind, therefore trip, if without tripping, set " failure
Cut off successfully " mark.
K5 faults itself electric current is reversed, and two sides only have the faulty electric current in the side K4, and positioning failure is jumped on front side of it
Lock, if without tripping, set " Fault Isolation success " mark.
Meanwhile in dispatching desk looped network figure or the monitoring interface of line chart, increase show positive fault-current signal mark and
It shows reverse fault current signal mark, allows the flow direction of the clear fault current of dispatcher；Increase " failure removal success ", " failure
It is isolated successfully " automation signal alarm window, keep fault point very clear.Failure for dispatcher and live operation maintenance personnel is fast
Speed positioning provides a kind of technical support, carries out the analysis of automation equipment action situation after occurring convenient for failure.
Above to a kind of monitoring device, monitoring method and the monitoring of Distributed power net automatic switch provided by the present invention
System is described in detail.Each embodiment is described in a progressive manner in specification, what each embodiment stressed
It is the difference from other embodiments, the same or similar parts in each embodiment may refer to each other.For embodiment
For disclosed device, since it is corresponded to the methods disclosed in the examples, so be described relatively simple, related place referring to
Method part illustration.It should be pointed out that for those skilled in the art, not departing from the principle of the invention
Under the premise of, it can be with several improvements and modifications are made to the present invention, these improvement and modification also fall into the claims in the present invention
Protection scope in.
It should also be noted that, in the present specification, relational terms such as first and second and the like be used merely to by
One entity or operation are distinguished with another entity or operation, without necessarily requiring or implying these entities or operation
Between there are any actual relationship or orders.Moreover, the terms "include", "comprise" or its any other variant meaning
Covering non-exclusive inclusion, so that the process, method, article or equipment for including a series of elements not only includes that
A little elements, but also including other elements that are not explicitly listed, or further include for this process, method, article or
The intrinsic element of equipment.In the absence of more restrictions, the element limited by sentence "including a ...", is not arranged
Except there is also other identical elements in the process, method, article or apparatus that includes the element.
Claims (10)
1. a kind of monitoring device of Distributed power net automatic switch, including circuit parameter Acquisition Circuit, switching value input circuit,
Communication interface, control loop, outputting circuit for relay, the signal acquisition circuit being connect with the circuit parameter Acquisition Circuit, dress
Set power supply, and respectively with the circuit parameter Acquisition Circuit, the switching value input circuit, the communication interface, the control
The controller that circuit processed, the relay output loop, the signal acquisition circuit are connected with described device power supply, the control
The switching value of circuit parameter and switching value input circuit input that device is used to be acquired according to the circuit parameter Acquisition Circuit
Signal controls the control loop and the outputting circuit for relay executes protection act, which is characterized in that further include:
First input end is with the protective current acquisition module that is connected in the circuit parameter Acquisition Circuit for acquiring quick-break
The connection of the first relay, the second input terminal and the zero-sequence current acquisition mould being connected in the circuit parameter Acquisition Circuit of electric current
The power that the second relay connection for acquiring zero-sequence current and overload value of block, output end are connect with the controller
Directional element, and the first display device is connect with the controller；
Wherein, the controller flows through the side of the electric current of local-monitoring device according to the judgement of the output valve of the power directional element
To, and control first display device and show the sense of current.
2. monitoring device according to claim 1, which is characterized in that the power directional element is specially rectification type power
Directional relay.
3. monitoring device according to claim 1, which is characterized in that first display device is specially touch screen.
4. monitoring device according to claim 1, which is characterized in that further include the first instruction being connect with the controller
Circuit for lamp and the second indicator light circuit；
The controller is preset forward current in the electric current for flowing through monitoring device and the forward current is greater than first
The indicator light controlled in first indicator light circuit when preset value lights；
The controller is preset reverse current in the electric current for flowing through monitoring device and the reverse current is greater than second
The indicator light controlled in second indicator light circuit when preset value lights.
5. monitoring device according to claim 1, which is characterized in that further include being connect with the controller for showing
By the second display device of the status information of the automatic switch of local-monitoring device protection.
6. monitoring device according to claim 1, which is characterized in that further include the wireless communication being connect with the controller
Device.
7. monitoring device according to claim 6, which is characterized in that the wireless communicator is specifically Wi-Fi communicator.
8. a kind of monitoring method of Distributed power net automatic switch, which is characterized in that be based on claim 1 to 7 any one
The monitoring device of the Distributed power net automatic switch, comprising:
Controller analyzes the direction of the fault current of local-monitoring device when the backbone for detecting power distribution network breaks down,
And the monitoring device of the automatic switch adjacent with two sides exchanges detection information；
When the fault current that the controller is analyzed to obtain the local-monitoring device is preset forward current and the local
The two sides of monitoring device only have there are when fault current in the automatic switch of side, and fault point is in the local monitor
The rear side of device simultaneously controls execution failure removal operation；
When the fault current that the controller is analyzed to obtain the local-monitoring device is preset reverse current and the local
The two sides of monitoring device only have in the automatic switch of side that there are when fault current, position the fault point in the local
The front side of monitoring device simultaneously executes Fault Isolation operation.
9. monitoring method according to claim 8, which is characterized in that further include:
The controller believes the detection of the direction of the fault current of the local-monitoring device, the adjacent automatic switch
The result of breath, the positioning result of the fault point and execution protection act is sent to remote scheduling platform.
10. a kind of monitoring system of Distributed power net automatic switch, which is characterized in that including claim 1 to 7 any one
The monitoring device of the Distributed power net automatic switch, further includes:
The remote scheduling platform being communicatively coupled with the controller of the monitoring device, described in being obtained at the controller
The monitoring information of monitoring device is simultaneously shown.
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