CN108663946A - Test method and system for control protection device in multi-terminal hybrid direct-current power transmission - Google Patents
Test method and system for control protection device in multi-terminal hybrid direct-current power transmission Download PDFInfo
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- CN108663946A CN108663946A CN201710209718.5A CN201710209718A CN108663946A CN 108663946 A CN108663946 A CN 108663946A CN 201710209718 A CN201710209718 A CN 201710209718A CN 108663946 A CN108663946 A CN 108663946A
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- G—PHYSICS
- G05—CONTROLLING; REGULATING
- G05B—CONTROL OR REGULATING SYSTEMS IN GENERAL; FUNCTIONAL ELEMENTS OF SUCH SYSTEMS; MONITORING OR TESTING ARRANGEMENTS FOR SUCH SYSTEMS OR ELEMENTS
- G05B17/00—Systems involving the use of models or simulators of said systems
- G05B17/02—Systems involving the use of models or simulators of said systems electric
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
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Abstract
The embodiment of the application provides a method and a system for testing a control protection device in multi-terminal hybrid direct-current power transmission, relates to the field of direct-current power transmission, and can realize closed-loop test on a multi-terminal hybrid direct-current power transmission system. The test system includes: the system comprises an RTDS simulation workstation, at least one conventional direct current converter station, at least two flexible direct current converter stations, an IO board card, at least one conventional direct current control protection device and at least one flexible direct current control protection device in a multi-terminal hybrid direct current power transmission model integrated on an RTDS processing board card provided by the RTDS simulation workstation; each conventional direct current control protection device is interconnected with one or more conventional direct current converter stations through an IO board card and is used for interacting analog quantity and digital quantity of the conventional direct current converter stations with an RTDS simulation workstation; each flexible direct current control protection device is interconnected with one or more flexible direct current converter stations through an IO board card and used for interacting analog quantity and digital quantity of the flexible direct current converter stations with an RTDS simulation workstation.
Description
Technical field
This application involves a kind of surveys of control protective unit in direct current transportation field more particularly to multiterminal Hybrid HVDC
Method for testing and system.
Background technology
Multi-terminal direct current transmission system is by the high voltage direct current between three or three or more current conversion stations and connection current conversion station
Transmission line of electricity forms, and the receiving end of multiple and different sending ends for sending capacity outside and multiple and different consumption capacity can be flexibly matched with, help
In playing advantage of multiple receiving end power grids in terms of digestion capability, peak modulation capacity, system safety and stability, can also save valuable defeated
Electric corridor resource, reduces investment outlay.Current source converter (csc) (the English based on line commutation is all made of relative to all current conversion stations：
Line Commutate Converter, referred to as：LCC) the multiterminal customary DC transmission system of customary DC, use sending end for
LCC customary DCs are all the voltage source converter (English based on full-controlled device using receiving end：Voltage Source
Converter, referred to as：MMC) the multiterminal Hybrid HVDC system of flexible direct current, due to receiving end MMC flexible direct-current it is active
Power and reactive power can decouple, and not have multiple LCC changes of current stand controls in above-mentioned multiterminal customary DC transmission system
The problem of pattern requires height to coordinate, therefore, above-mentioned multiterminal Hybrid HVDC system are transmitted electricity compared to multiterminal customary DC
Its control of system is more flexible, stability higher.
It is domestic at present since sending end is the multiterminal Hybrid HVDC system that LCC customary DC receiving ends are MMC flexible direct-current
Outer not have engineering construction also, control ＆ protection strategy and its research influenced on system stability are also to rest on theory to grind mostly
Study carefully the stage, the simulation study tool of use is usually non real-time EM transient calculation program (English：Electro Magnetic
Transientin DC System, referred to as：) or electromechanical stability Calculation program BPA etc. EMTDC.But using EMTDC
Electromagnetic transient state procedure, although can be with accurate simulation direct current and its dynamic response characteristic of control ＆ protection strategy, due to EMTDC
Nonreal time simulation tool, cannot external control protective unit, the control of the following multiterminal mixed DC engineering can not be supported to protect
Device closed loop test；In addition for the electromechanical program such as BPA, the dynamic response characteristic of LCC and MMC direct currents can not be simulated, there are no
Method research control strategy.
Invention content
Embodiments herein provides the test method and system of control protective unit in a kind of multiterminal Hybrid HVDC,
Closed loop test can be realized to multiterminal Hybrid HVDC system.
In order to achieve the above objectives, embodiments herein adopts the following technical scheme that：
In a first aspect, a kind of test system of control protective unit in multiterminal Hybrid HVDC is provided, including：Number in real time
The multiterminal mixing integrated on the RTDS processing boards that word emulator RTDS simulation work stations, the RTDS simulation work stations provide is straight
It is stream transmission of electricity at least one of model customary DC current conversion station and at least two flexible direct current converter stations, I O board card, at least one
Customary DC control protective unit and at least one flexible direct current control protective unit；
Wherein, each customary DC control protective unit passes through I O board card and the one of the multiterminal Hybrid HVDC model
A or multiple customary DC current conversion station interconnections；Each flexible direct current control protective unit is mixed directly by I O board card with the multiterminal
One or more flexible direct current converter stations interconnection of stream transmission of electricity model；
The customary DC control protective unit, for interacting institute with the RTDS simulation work stations by the I O board card
State the analog quantity and digital quantity of customary DC current conversion station；
The flexible direct current control protective unit, for interacting institute with the RTDS simulation work stations by the I O board card
State the analog quantity and digital quantity of flexible direct current converter station.
Optionally, multiterminal Hybrid HVDC model integrated on the RTDS processing board includes：
Customary DC current conversion station, size step-length interface circuit under big step-length environment, the AC system under big step-length environment,
Flexible direct current converter station under small step-length environment and size step-length interface transformer；
The DC side of the customary DC current conversion station passes through the big small step with the DC side of the flexible direct current converter station
Long interface circuit connection；
The exchange side of the customary DC current conversion station is connect with the AC system under the big step-length environment；
The exchange side of the flexible direct current converter station passes through the size step-length interface transformer and the big step-length environment
Under AC system connection.
Optionally, the I O board card and the customary DC control protective unit and the flexible direct current control protective unit
Pass through cable connection；
It is connected by optical fiber between the I O board card and RTDS processing boards.
Optionally, the customary DC control protective unit includes：First current conversion station control protective unit, the first bipolar valve
Group control protective unit and the first valve arrangement；The first change of current stand control for including in the customary DC control protective unit
Protective device, the first bipolar valve group control protective unit and the first valve arrangement, the I O board card and the RTDS emulate work
Make station and is in turn connected to form closed loop；
The flexible direct current control protective unit includes：Second current conversion station control protective unit, the second bipolar valve group control
Protective device and the second valve arrangement；The second change of current stand control protection dress for including in the flexible direct current control protective unit
Set, the second bipolar valve group control protective unit and the second valve arrangement, the I O board card and the RTDS simulation work stations according to
Secondary connection forms closed loop.
Optionally, the test system further includes：MMC simulators, wherein：
The RTDS simulation work stations are connect with the MMC simulators, are protected for that will be controlled according to the flexible direct current
The bridge arm electricity for the flexible direct current converter station that the analog quantity of the flexible direct current converter station of protection unit feedback and digital gauge calculate
Flow valuve is sent to the MMC simulators；
The MMC simulators are connect with the flexible direct current control protective unit, for simulating flexible direct current converter station
MMC, and the bridge arm current value sent according to the MMC simulated and the RTDS simulation work stations calculates each MMC
The capacitance voltage of each MMC submodules is sent to the flexible direct current control protective unit by the capacitance voltage of module.
Optionally, the flexible direct current control protective unit is additionally operable to send each MMC submodules to the MMC simulators
The trigger pulse of block switch；
The MMC simulators are specifically used for：Each MMC is determined according to the trigger pulse of each MMC submodules switch
The working condition of module, and emulated according to the MMC simulated, the working condition of each MMC submodules and the RTDS
The bridge arm current value that work station is sent, calculates the capacitance voltage of each MMC submodules.
Second aspect provides a kind of test method of control protective unit in Hybrid HVDC, is applied to first aspect
The test system of offer, including：
Multiterminal in the RTDS simulation work stations that RTDS simulation work stations are fed back according to customary DC control protective unit
The analog quantity and digital quantity of customary DC current conversion station in Hybrid HVDC model survey the customary DC current conversion station
Examination, and to the analog quantity and digital quantity after the customary DC control protective unit feedback test；
In the RTDS simulation work stations that the RTDS simulation work stations are fed back according to flexible direct current control protective unit
The analog quantity and digital quantity of flexible direct current converter station in multiterminal Hybrid HVDC model, to the flexible direct current converter station into
Row test, and to the analog quantity and digital quantity after the flexible direct current control protective unit feedback test.
Optionally, the test system further includes MMC simulators, and the method further includes：
The flexible direct current converter station that the RTDS simulation work stations are fed back according to the flexible direct current control protective unit
Analog quantity and digital quantity calculate the bridge arm current value of the flexible direct current converter station, and the bridge arm current value are sent to
The MMC simulators；
The bridge arm electricity that the MMC simulators are sent according to the MMC simulated and the RTDS simulation work stations
Flow valuve calculates the capacitance voltage of each MMC submodules, and the capacitance voltage of each MMC submodules is sent to the flexible direct current
Control protective unit.
Optionally, the MMC simulators are sent described according to the MMC simulated and the RTDS simulation work stations
Bridge arm current value, the capacitance voltage for calculating each MMC submodules specifically include：
Receive the trigger pulse for each MMC submodules switch that the flexible direct current control protective unit is sent；
The working condition of each MMC submodules is determined according to the trigger pulse of each MMC submodules switch；
According to the MMC transverters simulated, the working condition of each MMC submodules and the RTDS simulation works
Stand send the bridge arm current value, calculate the capacitance voltage of each MMC submodules.
Scheme provided by the present application integrates sending end routine by being handled in the RTDS that RTDS simulation work stations provide on board
The multiterminal Hybrid HVDC model of direct current receiving end flexible direct current is established comprising RTDS simulation work stations, RTDS processing board, IO
Customary DC current conversion station and corresponding routine in the multiterminal Hybrid HVDC model integrated on board and RTDS processing boards
The customary DC closed loop test circuit that DC control protective device is formed, and, including RTDS simulation work stations, RTDS processing boards
Card, I O board card and RTDS processing board on integrate multiterminal Hybrid HVDC model in flexible direct current converter station with it is corresponding
The flexible direct current closed loop test circuit that flexible direct current control protective unit is formed, for customary DC transmission of electricity and flexible DC power transmission point
Different closed loop test circuits is not established so that multiterminal Hybrid HVDC model is not by sending end and receiving end current conversion station number
Limitation, is not also limited by the wiring construction of multiterminal element in parallel or series, for the control of following multiterminal Hybrid HVDC engineering
Protective device test processed provides reliable and effective research and test platform, simple, convenient and practical, for verifying and optimizing
The control ＆ protection strategy of engineering improves the stability and reliability of engineering operation.
Description of the drawings
It, below will be in embodiment or description of the prior art in order to illustrate more clearly of the technical solution of the embodiment of the present application
Required attached drawing is briefly described, it should be apparent that, the accompanying drawings in the following description is only some realities of the application
Example is applied, it for those of ordinary skill in the art, without creative efforts, can also be according to these attached drawings
Obtain other attached drawings.
Fig. 1 is the test system of control protective unit in a kind of multiterminal Hybrid HVDC provided by the embodiments of the present application
System architecture diagram；
Fig. 2 is a kind of topological structure schematic diagram of multiterminal Hybrid HVDC model provided by the embodiments of the present application；
Fig. 3 is the knot of customary DC control protective unit and flexible direct current control protective unit provided by the embodiments of the present application
Structure schematic diagram；
Fig. 4 is the topological structure schematic diagram of the customary DC current conversion station of bipolar bivalve group provided by the embodiments of the present application；
Fig. 5 is customary DC 12 provided by the embodiments of the present application pulsation LCC transverter topological structure schematic diagrames；
Fig. 6 is the topological structure schematic diagram of the flexible direct current converter station of bipolar bivalve group provided by the embodiments of the present application；
Fig. 7 is the topological schematic diagram of flexible direct current MMC convertor units provided by the embodiments of the present application；
Fig. 8 is full-bridge topologies schematic diagram provided by the embodiments of the present application；
Fig. 9 is the test system of control protective unit in another multiterminal Hybrid HVDC provided by the embodiments of the present application
System architecture diagram；
Figure 10 is that three end Hybrid HVDC system of parallel connection type provided by the embodiments of the present application corresponding test system is
System Organization Chart；
Figure 11 is the test method of control protective unit in a kind of multiterminal Hybrid HVDC provided by the embodiments of the present application
Method flow diagram.
Specific implementation mode
Below in conjunction with the attached drawing in the embodiment of the present application, technical solutions in the embodiments of the present application carries out clear, complete
Site preparation describes, it is clear that described embodiments are only a part of embodiments of the present application, instead of all the embodiments.It is based on
Embodiment in the application, those of ordinary skill in the art are obtained every other without creative efforts
Embodiment shall fall in the protection scope of this application.
In the application, " illustrative " or " such as " etc. words for indicate make example, illustration or explanation.The application is implemented
Example in be described as " illustrative " or " such as " any embodiment or design scheme be not necessarily to be construed as than other implementations
Example or design scheme are more preferably or more advantage.Specifically, use " illustrative " or " such as " etc. words be intended to specific
Related notion is presented in mode.In the application, " (English：Of) ", " corresponding (English：Corresponding, relevant) "
" corresponding (English：Corresponding it) " can use with sometimes, it is noted that when not emphasizing its difference, institute
The meaning to be expressed is consistent.
Embodiments herein mainly for multiterminal Hybrid HVDC system come to test system provided by the present application with
And test method is illustratively illustrated.And the targeted multiterminal Hybrid HVDC system of the application is at least one send
It holds, the multi-terminal direct current transmission system of at least two receiving ends, and the sending end of the multiterminal Hybrid HVDC system uses customary DC
It transmits electricity (e.g., LCC direct current transportation), receiving end uses flexible DC power transmission (e.g., MMC direct current transportation).
The embodiment of the present application provides a kind of test system of control protective unit in multiterminal Hybrid HVDC, such as Fig. 1 institutes
Show, which includes：The RTDS that Real Time Digital Simulator RTDS simulation work stations 101, RTDS simulation work stations 101 provide
Handle at least one of the multiterminal Hybrid HVDC model customary DC current conversion station integrated on board 102 and at least two soft
Property DC converter station, I O board card 103, at least one customary DC control protective unit 104 and at least one flexible direct current control
Protective device 105 processed, wherein：
Each customary DC control protective unit 104 handles the multiterminal integrated on board 102 by I O board card 103 and RTDS
One or more of Hybrid HVDC model customary DC current conversion station interconnects；Each flexible direct current control protective unit 105
It is flexible that one or more of multiterminal Hybrid HVDC model integrated on board 102 is handled by I O board card 103 and RTDS
DC converter station interconnects.
Customary DC control protective unit 104 interacts routine for passing through I O board card 103 with RTDS simulation work stations 101
The analog quantity and digital quantity of DC converter station.
Flexible direct current control protective unit 105 interacts flexibility for passing through I O board card 103 with RTDS simulation work stations 101
The analog quantity and digital quantity of DC converter station.
Above-mentioned I O board card 103 passes through with customary DC control protective unit 104 and flexible direct current control protective unit 105
Cable connection；It is connected by optical fiber between I O board card 103 and RTDS processing boards 102.
It should be noted that the customary DC control protective unit 104 in the application can be to one or more conventional straight
Flow current conversion station carry out closed loop test, flexible direct current control protective unit 105 can to one or more flexible direct current converter stations into
Row closed loop test, does not limit here.
Optionally, since the customary DC current conversion station of sending end in existing multiterminal Hybrid HVDC system is usually big step
The flexible direct current converter station of customary DC current conversion station (e.g., LCC customary DCs current conversion station) under long environment, receiving end is small step-length ring
Flexible direct current converter station (e.g., MMC flexible direct-current current conversion station) under border, in order to solve sending end customary DC and receiving end flexible direct current
Between interconnected by remote long transmission line across step size coordinating emulation the problem of, the application passes through in existing multiterminal mixed DC
Increase size step-length interface circuit and size step-length interface transformer in transmission system, to coordinate to step-length environment.
Illustratively, as shown in Fig. 2, the multiterminal Hybrid HVDC model integrated on RTDS processing boards includes：Big step
The flexible direct current converter station under customary DC current conversion station 201, size step-length interface circuit 202, small step-length environment under long environment
203, size step-length interface transformer 204 and the AC system 205 greatly under step-length environment；
The DC side of customary DC current conversion station 201 passes through size step-length interface with the DC side of flexible direct current converter station 203
Circuit 202 connects；
The exchange side of flexible direct current converter station 203 passes through the friendship under size step-length interface transformer 204 and big step-length environment
Streaming system 205 connects；
The exchange side of customary DC current conversion station 201 is connect with the AC system 205 under big step-length environment.
Optionally, a demand is sent at a distance in order to adapt to large capacity, the routine of sending end in multiterminal Hybrid HVDC system
Twin-stage valve block structure may be used in DC converter station and the flexible direct current converter station of receiving end.At this point, corresponding customary DC
The structure of control protective unit and the structure of flexible direct current control protective unit are referred to shown in Fig. 3.
As shown in figure 3, customary DC control protective unit 31 includes：First valve arrangement 311, the first bipolar valve group control
Protective device 312 and the first current conversion station control protective unit 313；Include in customary DC control protective unit 31 first is changed
Flow stand control protective device 313,312 and first valve arrangement 311 of the first bipolar valve group control protective unit, I O board card 32 and
RTDS simulation work stations 33 are in turn connected to form closed loop；
Flexible direct current control protective unit 32 includes：Second valve arrangement 321, the second bipolar valve group control protective unit
322 and the second current conversion station control protective unit 323；The second change of current stand control for including in flexible direct current control protective unit 32
Protective device 323,322 and second valve arrangement 321 of the second bipolar valve group control protective unit, I O board card 32 and RTDS are emulated
Work station 33 is in turn connected to form closed loop.
In a kind of concrete implementation mode, customary DC current conversion station receives the first valve arrangement by intake board
311 trigger pulse, the conducting for triggering control thyristor；First valve arrangement 311 and the first bipolar valve group control are protected
Device 312 connects；First bipolar valve group control protective unit 312 is connect with the first current conversion station control protective unit 313；First changes
Stream stand control protective device 313 is connect by I O board card 32 with RTDS simulation work stations 33, the simulation of transmission control and protection
Amount and digital quantity.
In a kind of concrete implementation mode, flexible direct current converter station receives valve arrangement 321 by intake board
Trigger pulse, for trigger control thyristor conducting；Valve arrangement 321 and bipolar valve group control protective unit 322
Connection；Bipolar valve group control protective unit 312 is connect with current conversion station control protective unit 323；Second change of current stand control is protected
Protection unit 323 is connect by I O board card 32 with RTDS simulation work stations 33, the analog quantity and digital quantity of transmission control and protection.
Fig. 4 is the topological structure schematic diagram of the customary DC current conversion station of bipolar bivalve group, with reference to Fig. 4 it is found that customary DC
The pole 1401 and pole 2402 of current conversion station are respectively connected on the same ac bus 406, and alternating current filter 407 is also connected to a
On ac bus 406；Wherein, pole 1401 is in series by high pressure valve group 4011 and low pressure valve group 4012, the direct current in pole 1401
Filter 4013 is connected in parallel between the anode of high pressure valve group 4011 and the cathode of low pressure valve group 4012；Pole 2402 is by high pressure valve group
4021 and low pressure valve group 4022 it is in series, the DC filter 4023 in pole 2402 be connected in parallel on low pressure valve group 4022 anode with
And between the cathode of high pressure valve group 4021；4012 cathode of low pressure valve group of pole 1401 and the 4022 anode series connection of low pressure valve group of pole 2
It is connected, and grounded polar curve road 405 is grounded；The anode of the high pressure valve group 4011 of pole 1401 and the high pressure valve group 4021 of pole 2402
Cathode connect respectively with reactor 403.
Illustratively, general high pressure valve group and low pressure valve group based on LCC are made of 12 pulse transverters, ginseng
According to customary DC 12 shown in fig. 5 pulsation LCC transverter topological structure schematic diagrames it is found that each 12 pulse conversion devices are by two 6
Pulse conversion unit 502 constitute, two 6 pulse conversion units 502 respectively with Y/Y three-phase two-simulation transformers 503 and Y/D tri-
The Y windings of the secondary side of phase two-winding transformer 504 are connected with D windings；6 pulse conversion units 502 are by three thyristor groups 504
Parallel connection is constituted, and each thyristor groups 504 are made of concatenated two thyristors 501.
Fig. 6 is the topological structure schematic diagram of the flexible direct current converter station of bipolar bivalve group, referring to Figure 5, flexible direct current
The pole 1601 and pole 2602 of current conversion station are connected in parallel on 603 incoming transport system of the same ac bus respectively.Wherein, pole 1601 is by height
Pressure valve group 6011 and low pressure valve group 6012 are in series；Pole 2602 is in series by high pressure valve group 6021 and low pressure valve group 6022；
6012 cathode of low pressure valve group of pole 1601 and 6022 anode of low pressure valve group of pole 2602 are connected in series, and grounded polar curve road 604
Ground connection；The anode of the high pressure valve group 6011 of pole 1601 and 6021 cathode of high pressure valve group of pole 2602 respectively by RTDS emulation at
The size step-length interface circuit 605 in multiterminal Hybrid HVDC model in reason board is connected with the DC line of big step-length,
It solves the problems, such as to overstate that step-length is connect with sending end LCC customary DCs through long transmission line.
Illustratively, general high pressure valve group and low pressure valve group based on MMC are by a MMC convertor unit structure
At, with reference to flexible direct current MMC convertor units shown in Fig. 7 topological schematic diagram it is found that each MMC convertor units include and big step
Long AC system connected size step-length interface tietransformer 705, starting-up later time 704 and MMC transverters 708.Wherein,
MMC transverters 708 are that three-phase bridge arm 707 is constituted, and per being mutually divided into as upper bridge arm 701 and lower bridge arm 704, on three-phase, bridge arm 701 is simultaneously
The common node of connection is direct-flow positive pole, and the common node in parallel of three-phase lower bridge arm 704 is direct current cathode.Upper bridge arm 701 per phase
And lower bridge arm 704 is in series by a submodules 702 up to a hundred cascade and bridge arm reactor 703 respectively.
In a kind of example, in order to adapt to long distance powedr transmission requirement, MMC transverters above may be used with direct current
The submodule of the full-bridge topologies of line fault Scavenging activity.With reference to full-bridge submodule topology schematic diagram shown in Fig. 8 it is found that
The switch submodule of the MMC submodules of MMC transverters respectively include the first IGBT pipes 801 and its antiparallel diode 8011,
2nd IGBT pipes 802 and its antiparallel diode 8021, the 3rd IGBT pipes 803 and its antiparallel diode the 8031, the 4th
IGBT pipes 804 and its antiparallel diode 8041 and capacitor 605 are constituted；The collector and second of first IGBT pipes 801
The emitter of IGBT pipes 802 connects；The collector of 3rd IGBT pipes 803 is connect with the emitter of the 4th IGBT pipes 804；First
The emitter of IGBT pipes 801 is in parallel with the emitter of the 3rd IGBT pipes 803, and accesses one end of capacitor 805；2nd IGBT is managed
802 emitter is in parallel with the collector of the 4th IGBT pipes 804, and accesses the other end of capacitor 805.
Optionally, as shown in figure 9, on the basis of test system shown in Fig. 1, which further includes：MMC is emulated
Device 106, wherein：
RTDS simulation work stations 101 are connect with MMC simulators 106, and being used for will be according to flexible direct current control protective unit
The bridge arm current value for the flexible direct current converter station that the analog quantity of the flexible direct current converter station of 104 feedbacks and digital gauge calculate is sent
To MMC simulators.
MMC simulators 106 are connect with flexible direct current control protective unit 105, for simulating flexible direct current converter station
MMC, and the bridge arm current value sent according to MMC the and RTDS simulation work stations 101 simulated, calculate each MMC submodules
The capacitance voltage of each MMC submodules is sent to flexible direct current control protective unit 105 by capacitance voltage.
Further alternative, above-mentioned flexible direct current control protective unit 105 is additionally operable to send to MMC simulators 106
The trigger pulse of each MMC submodules switch.
MMC simulators 106 are specifically used for：The trigger pulse switched according to each MMC submodules determines each MMC submodules
Working condition, and the bridge arm sent according to the working condition of the MMC, each MMC submodules simulated and RTDS simulation work stations 101
Current value calculates the capacitance voltage of each MMC submodules.
For the apllied implementation method of apparent simple declaration, below with one LCC customary DC current conversion station of sending end, by
Illustrate the test system of the application for the three end Hybrid HVDC system of parallel connection type of the two MMC flexible direct-current current conversion stations in end
The connection relation of function and component.
Figure 10 is the system architecture diagram of the above-mentioned corresponding test system of three end Hybrid HVDC system of parallel connection type.Specifically
, referring to Fig.1 shown in 0, the test system include RTDS simulation work stations 901, RTDS simulation work stations 901 provide RTDS at
Manage board 902, I O board card 903, customary DC control protective unit 904, flexible direct current control protective unit 905, MCC emulation dresses
Set 906 and multiterminal cooperative control device 907, wherein above-mentioned customary DC control protective unit 904 is filled including the first valve control
Set 9041,9042 and first current conversion station control protective unit 9043 of the first bipolar valve group control protective unit；Flexible direct current control
Protective device 905 processed includes：Second valve arrangement 9051,9052 and second current conversion station of the second bipolar valve group control protective unit
Control protective unit 9053.
Referring to Fig.1 shown in 0, integrated three end of parallel connection type on the RTDS processing boards 902 that RTDS simulation work stations 901 provide
Hybrid HVDC system Real-Time Model includes：Sending end AC system a1, customary DC current conversion station a2, receiving end exchange system
Unite a3, flexible direct current converter station a4, size step-length interface circuit a5, DC line a6 and size step-length interface transformer a7,
Wherein, size step-length interface circuit a5 is by the direct current of the DC side of two flexible direct current converter station a4 and customary DC current conversion station a2
Circuit a6 interconnection, and by size step-length interface transformer a7 by two flexible direct current converter station a4 exchange side respectively with one by
Hold AC system a3 interconnections.Sending end AC system a1 is connected with customary DC current conversion station a2.
Customary DC current conversion station a2 receives the trigger pulse of the first valve arrangement 9041 by I O board card 903, for triggering
The conducting of thyristor is controlled, the first valve arrangement 9041 is connect with the first bipolar valve group control protective unit 9042；First is bipolar
Valve group control protective unit 9042 is connect with the first current conversion station control protective unit 9043；First current conversion station control protective unit
9043 are connect by I O board card 903 with the processor board 902 of RTDS, the analog quantity and digital quantity of transmission control and protection.
Two flexible direct current converter station a4 are the simulation MMC transverters in MMC simulators 906, pass through optical fiber and RTDS
Handle the optical fiber port connection of board 902；Second valve arrangement 9051 is by optical fiber and MMC emulation screen connections, for realizing MMC's
Submodule switching controls；MMC simulators 906 assist submodule capacitor voltage, bridge arm current by international AURORA
View gives the second valve arrangement 9051, and the second valve arrangement 9051 gives submodule trigger pulse to MMC by AURORA agreements
Simulator 906；Second valve arrangement 9051 is connect with the second bipolar valve group control protective unit 9052；Second bipolar valve group control
Protective device 9052 processed is connect with the second change of current stand control protection 9053；Second change of current stand control protection 9053 passes through I O board card
903 connect with the processing board 902 of RTDS, the analog quantity and digital quantity of transmission control and protection.
Customary DC control protective unit 904 and flexible direct current control protective unit 905 by cable and optical fiber etc. with
Multiterminal cooperative control device 907 connects, start and stop and power transmission for being uniformly coordinated multiterminal mixed DC system etc..
Test system provided by the present application integrates sending end by being handled in the RTDS that RTDS simulation work stations provide on board
The multiterminal Hybrid HVDC model of customary DC receiving end flexible direct current is established comprising RTDS simulation work stations, RTDS processing boards
Customary DC current conversion station in the multiterminal Hybrid HVDC model integrated on card, I O board card and RTDS processing boards, and it is corresponding
Customary DC control protective unit formed customary DC closed loop test circuit, and, including at RTDS simulation work stations, RTDS
Flexible direct current converter station in the multiterminal Hybrid HVDC model integrated on board, I O board card and RTDS processing boards is managed, with
The flexible direct current closed loop test circuit that corresponding flexible direct current control protective unit is formed, for customary DC transmission of electricity and flexible direct current
Different closed loop test circuits is established in transmission of electricity respectively so that multiterminal Hybrid HVDC model is not by sending end and receiving end current conversion station
The limitation of number is not also limited by the wiring construction of multiterminal element in parallel or series, for following multiterminal Hybrid HVDC work
The control protective unit test of journey provides reliable and effective research and test platform, simple, convenient and practical, for verifying
With the control ＆ protection strategy of optimization engineering, the stability and reliability of engineering operation are improved.
Illustrate embodiment of the method corresponding with system embodiment presented above provided by the embodiments of the present application below.
It should be noted that in following methods embodiment related content explanation, can refer to above system embodiment.
The application provides a kind of test method of control protective unit in multiterminal Hybrid HVDC, is applied to illustrated above
Test system, as shown in figure 11, this method comprises the following steps：
Multiterminal in the RTDS simulation work stations that S101, RTDS simulation work station are fed back according to customary DC control protective unit
The analog quantity and digital quantity of customary DC current conversion station in Hybrid HVDC model, test customary DC current conversion station,
And to the analog quantity and digital quantity after customary DC control protective unit feedback test.
Multiterminal in the RTDS simulation work stations that S102, RTDS simulation work station are fed back according to flexible direct current control protective unit
The analog quantity and digital quantity of flexible direct current converter station in Hybrid HVDC model, test flexible direct current converter station,
And to the analog quantity and digital quantity after flexible direct current control protective unit feedback test.
It should be noted that above-mentioned step S101 is the testing process of customary DC transmission of electricity, step S102 is flexible straight
The testing process of stream, two steps have no point of priority.
Optionally, when the test system further includes MMC simulators, this method further includes following steps：
The flexible direct current converter station that S201, RTDS simulation work station are fed back according to the flexible direct current control protective unit
Analog quantity and digital quantity calculate the bridge arm current value of flexible direct current converter station, and bridge arm current value are sent to the MMC and is imitated
True device.
The bridge arm current that S202, MMC simulator are sent according to the MMC transverters and RTDS simulation work stations simulated
Value, calculates the capacitance voltage of each MMC submodules, and the capacitance voltage of each MMC submodules is sent to flexible direct current control protection dress
It sets.
Further alternative, above-mentioned steps S202 specifically comprises the following steps：
S2021, the trigger pulse for receiving each MMC submodules switch that flexible direct current control protective unit is sent.
S2022, the trigger pulse switched according to each MMC submodules determine the working condition of each MMC submodules.
S2023, it is sent according to the working condition and RTDS simulation work stations of the MMC transverters, each MMC submodules that simulate
Bridge arm current value, calculate the capacitance voltage of each MMC submodules.
Detection method provided by the present application, not sending end and receiving end current conversion station number in by multiterminal Hybrid HVDC system
Limitation, also do not limited by the wiring construction of multiterminal element in parallel or series, can be to being given in multiterminal Hybrid HVDC system
The customary DC transmission of electricity at end and the flexible DC power transmission of receiving end are tested respectively, easy to operate simple.
Finally it should be noted that：Above example is only to illustrate the technical solution of the application, rather than its limitations；Although
The application is described in detail with reference to the foregoing embodiments, it will be understood by those of ordinary skill in the art that：It still may be used
With technical scheme described in the above embodiments is modified or equivalent replacement of some of the technical features；
And these modifications or replacements, each embodiment technical solution of the application that it does not separate the essence of the corresponding technical solution spirit and
Range.
Claims (9)
1. the test system of control protective unit in a kind of multiterminal Hybrid HVDC, which is characterized in that including：Real-time digital is imitative
The multiterminal mixed DC integrated on the RTDS processing boards that true device RTDS simulation work stations, the RTDS simulation work stations provide is defeated
At least one of electric model customary DC current conversion station and at least two flexible direct current converter stations, I O board card, at least one routine
DC control protective device and at least one flexible direct current control protective unit；
Wherein, each customary DC control protective unit by one of I O board card and the multiterminal Hybrid HVDC model or
Multiple customary DC current conversion station interconnections；Each flexible direct current control protective unit is defeated by I O board card and the multiterminal mixed DC
One or more flexible direct current converter stations of electric model interconnect；
The customary DC control protective unit, it is described normal for being interacted with the RTDS simulation work stations by the I O board card
Advise the analog quantity and digital quantity of DC converter station；
The flexible direct current control protective unit, it is described soft for being interacted with the RTDS simulation work stations by the I O board card
The analog quantity and digital quantity of property DC converter station.
2. test system according to claim 1, which is characterized in that the multiterminal mixing integrated on the RTDS processing board
Direct current transportation model includes：
Customary DC current conversion station, size step-length interface circuit under big step-length environment, the AC system under big step-length environment, small step
Flexible direct current converter station under long environment and size step-length interface transformer；
The DC side of the customary DC current conversion station is connect with the DC side of the flexible direct current converter station by the size step-length
Mouth connection；
The exchange side of the customary DC current conversion station is connect with the AC system under the big step-length environment；
The exchange side of the flexible direct current converter station passes through under the size step-length interface transformer and the big step-length environment
AC system connects.
3. test system according to claim 1, which is characterized in that
The I O board card is connected with the customary DC control protective unit and the flexible direct current control protective unit by cable
It connects；
It is connected by optical fiber between the I O board card and RTDS processing boards.
4. testing system according to claim 1-3 any one of them, it is characterised in that：
The customary DC control protective unit includes：First current conversion station control protective unit, the first bipolar valve group control protection
Device and the first valve arrangement；The first current conversion station control protective unit for including in the customary DC control protective unit,
First bipolar valve group control protective unit and the first valve arrangement, the I O board card and RTDS simulation work stations connect successively
It connects to form closed loop；
The flexible direct current control protective unit includes：Second current conversion station control protective unit, the second bipolar valve group control protection
Device and the second valve arrangement；The second current conversion station control protective unit for including in the flexible direct current control protective unit,
Second bipolar valve group control protective unit and the second valve arrangement, the I O board card connect successively with the RTDS simulation work stations
It connects to form closed loop.
5. test system according to claim 4, which is characterized in that the test system further includes：Based on full-controlled device
Voltage source converter MMC simulators, wherein：
The RTDS simulation work stations are connect with the MMC simulators, for that will control protection dress according to the flexible direct current
Set the bridge arm current value of the analog quantity of the flexible direct current converter station of feedback and the flexible direct current converter station of digital gauge calculating
It is sent to the MMC simulators；
The MMC simulators are connect with the flexible direct current control protective unit, for simulating flexible direct current converter station
MMC, and the bridge arm current value sent according to the MMC simulated and the RTDS simulation work stations, calculate each MMC submodules
The capacitance voltage of each MMC submodules is sent to the flexible direct current control protective unit by the capacitance voltage of block.
6. test system according to claim 5, it is characterised in that：
The flexible direct current control protective unit is additionally operable to send the triggering that each MMC submodules switch to the MMC simulators
Pulse；
The MMC simulators are specifically used for：Each MMC submodules are determined according to the trigger pulse of each MMC submodules switch
Working condition, and according to the MMC simulated, the working condition of each MMC submodules and the RTDS simulation works
Stand send the bridge arm current value, calculate the capacitance voltage of each MMC submodules.
7. the test method of control protective unit in a kind of Hybrid HVDC is applied to claim 1-6 any one of them
Test system, which is characterized in that including：
Multiterminal mix in the RTDS simulation work stations that RTDS simulation work stations are fed back according to customary DC control protective unit
The analog quantity and digital quantity of customary DC current conversion station in direct current transportation model test the customary DC current conversion station,
And to the analog quantity and digital quantity after the customary DC control protective unit feedback test；
Multiterminal in the RTDS simulation work stations that the RTDS simulation work stations are fed back according to flexible direct current control protective unit
The analog quantity and digital quantity of flexible direct current converter station in Hybrid HVDC model, survey the flexible direct current converter station
Examination, and to the analog quantity and digital quantity after the flexible direct current control protective unit feedback test.
8. the method according to the description of claim 7 is characterized in that the test system further includes the voltage based on full-controlled device
Source transverter MMC simulators, the method further include：
The simulation for the flexible direct current converter station that the RTDS simulation work stations are fed back according to the flexible direct current control protective unit
Amount and digital quantity, calculate the bridge arm current value of the flexible direct current converter station, and the bridge arm current value are sent to described
MMC simulators；
The bridge arm current value that the MMC simulators are sent according to the MMC simulated and the RTDS simulation work stations,
The capacitance voltage of each MMC submodules is sent to the flexible direct current control and protected by the capacitance voltage for calculating each MMC submodules
Protection unit.
9. according to the method described in claim 8, it is characterized in that, the MMC simulators are according to the MMC and institute simulated
The bridge arm current value of RTDS simulation work stations transmission is stated, the capacitance voltage for calculating each MMC submodules specifically includes：
Receive the trigger pulse for each MMC submodules switch that the flexible direct current control protective unit is sent；
The working condition of each MMC submodules is determined according to the trigger pulse of each MMC submodules switch；
It is sent out according to the MMC transverters simulated, the working condition of each MMC submodules and the RTDS simulation work stations
The bridge arm current value sent, calculates the capacitance voltage of each MMC submodules.
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Cited By (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109683583A (en) * | 2018-11-23 | 2019-04-26 | 国网安徽省电力有限公司电力科学研究院 | The test macro of converter valve protective device based on control protection decoupling |
| CN110470947A (en) * | 2019-08-15 | 2019-11-19 | 天津大学 | A kind of ground electrode circuit fault distance-finding method suitable for MMC direct current system |
| CN110783902A (en) * | 2019-10-22 | 2020-02-11 | 南方电网科学研究院有限责任公司 | Line fault detection method, device and medium for multi-terminal direct current transmission system |
| CN110851998A (en) * | 2019-12-06 | 2020-02-28 | 华北电力科学研究院有限责任公司 | Layered simulation test system for converter station |
| CN110994661A (en) * | 2019-11-12 | 2020-04-10 | 许继电气股份有限公司 | Offshore wind power flexible direct current converter station compact control protection configuration method and system |
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Citations (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN203276020U (en) * | 2013-04-25 | 2013-11-06 | 中国南方电网有限责任公司电网技术研究中心 | MMC flexible direct-current control device test system based on RTDS (real time digital simulator) |
| US20140129195A1 (en) * | 2011-06-24 | 2014-05-08 | State Grid Corporation Of China | Real time dynamic physics simulation device of flexible dc transmission system |
| CN104199311A (en) * | 2014-09-04 | 2014-12-10 | 南京南瑞继保电气有限公司 | Simulation test system of multi-terminal flexible direct current transmission control protection system |
| CN104714132A (en) * | 2015-03-17 | 2015-06-17 | 上海交通大学 | Flexible direct current power transmission converter performance testing platform and control method thereof |
| CN204424920U (en) * | 2015-04-11 | 2015-06-24 | 中国南方电网有限责任公司电网技术研究中心 | Hybrid direct current system topological structure based on LCC and MMC parallel connection and real-time simulation equipment thereof |
| CN104914734A (en) * | 2015-04-21 | 2015-09-16 | 中国南方电网有限责任公司电网技术研究中心 | Hybrid direct current closed loop test system and implementation method |
| CN105785976A (en) * | 2016-04-28 | 2016-07-20 | 中国南方电网有限责任公司电网技术研究中心 | Test method and system for control protection device in flexible direct current transmission |
| CN206920842U (en) * | 2017-03-31 | 2018-01-23 | 南方电网科学研究院有限责任公司 | Test system for controlling protection device in multi-terminal hybrid direct-current power transmission |
-
2017
- 2017-03-31 CN CN201710209718.5A patent/CN108663946A/en active Pending
Patent Citations (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20140129195A1 (en) * | 2011-06-24 | 2014-05-08 | State Grid Corporation Of China | Real time dynamic physics simulation device of flexible dc transmission system |
| CN203276020U (en) * | 2013-04-25 | 2013-11-06 | 中国南方电网有限责任公司电网技术研究中心 | MMC flexible direct-current control device test system based on RTDS (real time digital simulator) |
| CN104199311A (en) * | 2014-09-04 | 2014-12-10 | 南京南瑞继保电气有限公司 | Simulation test system of multi-terminal flexible direct current transmission control protection system |
| CN104714132A (en) * | 2015-03-17 | 2015-06-17 | 上海交通大学 | Flexible direct current power transmission converter performance testing platform and control method thereof |
| CN204424920U (en) * | 2015-04-11 | 2015-06-24 | 中国南方电网有限责任公司电网技术研究中心 | Hybrid direct current system topological structure based on LCC and MMC parallel connection and real-time simulation equipment thereof |
| CN104914734A (en) * | 2015-04-21 | 2015-09-16 | 中国南方电网有限责任公司电网技术研究中心 | Hybrid direct current closed loop test system and implementation method |
| CN105785976A (en) * | 2016-04-28 | 2016-07-20 | 中国南方电网有限责任公司电网技术研究中心 | Test method and system for control protection device in flexible direct current transmission |
| CN206920842U (en) * | 2017-03-31 | 2018-01-23 | 南方电网科学研究院有限责任公司 | Test system for controlling protection device in multi-terminal hybrid direct-current power transmission |
Cited By (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109683583A (en) * | 2018-11-23 | 2019-04-26 | 国网安徽省电力有限公司电力科学研究院 | The test macro of converter valve protective device based on control protection decoupling |
| WO2020181651A1 (en) * | 2019-03-12 | 2020-09-17 | 南方电网科学研究院有限责任公司 | Compact real-time simulation system for direct current control and protection |
| CN110470947A (en) * | 2019-08-15 | 2019-11-19 | 天津大学 | A kind of ground electrode circuit fault distance-finding method suitable for MMC direct current system |
| CN110470947B (en) * | 2019-08-15 | 2021-08-31 | 天津大学 | Grounding electrode line fault distance measurement method suitable for MMC direct current system |
| CN110783902A (en) * | 2019-10-22 | 2020-02-11 | 南方电网科学研究院有限责任公司 | Line fault detection method, device and medium for multi-terminal direct current transmission system |
| CN110783902B (en) * | 2019-10-22 | 2021-07-30 | 南方电网科学研究院有限责任公司 | Line fault detection method, device and medium for multi-terminal direct current transmission system |
| CN110994661A (en) * | 2019-11-12 | 2020-04-10 | 许继电气股份有限公司 | Offshore wind power flexible direct current converter station compact control protection configuration method and system |
| CN110851998A (en) * | 2019-12-06 | 2020-02-28 | 华北电力科学研究院有限责任公司 | Layered simulation test system for converter station |
| CN114035035A (en) * | 2021-11-11 | 2022-02-11 | 广东电网有限责任公司广州供电局 | Flexible direct current conversion protection link test system |
| CN114583740A (en) * | 2022-03-08 | 2022-06-03 | 昆明理工大学 | Multi-end hybrid direct-current power supply electrical topology of deep well non-coal mine electrified railway |
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