CN103792854A - Flexible direct current power transmission semi-physical simulation system based on modularization multi-level current converter - Google Patents
Flexible direct current power transmission semi-physical simulation system based on modularization multi-level current converter Download PDFInfo
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Abstract
The invention relates to the technical field of electric system flexible direct current power transmission and discloses a flexible direct current power transmission semi-physical simulation system based on a modularization multi-level current converter. Rectification station double-pole valve control, valve body model or inverting station double-pole valve control and valve body model real-time simulation are achieved through an FPGA simulation machine, a digital simulation host achieves alternating-direct current system real-time simulation in an MMC-HVDC system, an IO extending machine case is connected with an MMC-HVDC control protecting cabinet, the digital simulation host, the FPGA simulation machine and the IO extending machine case are connected through a PCIe exchanger, a double-pole MMC-HVDC system semi-physical simulation test can be completely achieved, a set of simulation testing scheme is provided for double-pole MMC-HVDC system researching and engineering testing, accordingly, complete double-pole MMC-HVDC system semi-physical simulation can be used in practical engineering tests, and testing on control protecting devices is close to practical application.
Description
Technical field
The present invention relates to Power System Flexible HVDC Transmission Technology field, particularly the flexible DC power transmission semi-matter simulating system based on modularization multi-level converter.
Background technology
Technology of HVDC based Voltage Source Converter (Modular Multilevel Converter Based High Voltage Direct Current based on modularization multi-level converter, be called for short " MMC-HVDC " or " MMC ") be voltage source converter D.C. high voltage transmission (Voltage Source Converter Based High Voltage Direct Current, be called for short " VSC-HVDC ") in the important branch in many level field, and modularization multi-level converter is a kind of brand-new transverter that is applicable to high pressure flexible direct current technology of transmission of electricity field rising recent years, the situation that original two level topologys are monopolized flexible direct current market has been broken in its appearance, increase the possibility of flexible direct current application.Each brachium pontis of modular multilevel all has the submodule of equal number and brachium pontis reactance to be in series, by controlling the input of submodule and exiting, make to export ground voltage and approach sinusoidal voltage, thereby form stable working point, simultaneously, drop into the complementation of electric capacity by same facies unit upper and lower bridge arm, form galvanic current and press, so just realized the stable operation of system.
Because HVDC (High Voltage Direct Current) transmission system number of devices is huge, system complex, control protective unit function is various, logic is complicated; if the equipment of design is directly dropped into operation, will have many unnecessary cost wastes and waste of material, layout is unreasonable; meanwhile, also likely cause safety problem.Therefore, general first by the control protective unit of semi-hardware type simulation test MMC-HVDC at present, after the control & protection strategy of control protective unit to be determined is correct, just formally drop in engineering application.
MMC-HVDC can be divided into two kinds of pseudo-bipolar MMC-HVDC and complete bipolar MMC-HVDC, and its system architecture respectively as shown in Figure 1 and Figure 2.Compared with the bipolar MMC-HVDC system of puppet, the main advantage of complete bipolar MMC-HVDC system shows:
(1) DC line dielectric level reduces greatly, depresses in same rated DC current, more much lower than the bipolar MMC-HVDC system insulation of puppet level.
(2) be easy to system built by separate periods and increase-volume enlarging, the one pole that first puts into operation puts into operation bipolar again, is conducive to bring into play early returns of investment.
(3) can be applicable to the flexible DC power transmission system of different electric pressures, different capabilities.
(4) can under the modes such as bipolar balance, bipolar imbalance, monopolar ground return, monopolar metallic return, move, the method for operation is versatile and flexible.
In view of complete bipolar MMC-HVDC has above good characteristic, the many level VSC-HVDC in existing planning adopts complete bipolar MMC-HVDC system architecture as shown in Figure 2 now.But; because the MMC-HDVC power system capacity of having moved is at present smaller; therefore; current MMC-HVDC control & protection strategy and the research of system operation characteristic; mainly, based on the bipolar MMC-HVDC system of puppet, current various MMC-HVDC semi-hardware type simulation test systems are also mainly based on the bipolar MMC-HVDC system of puppet.
In addition, RT-LAB is a kind of concurrent computational system that can realize real-time electric power system electromagnetic transient simulation, can, by its result output, connect and compose flexible hardware-in-the-loop simulation loop, for the test of various control protective units with physical device.The semi-hardware type simulation test of the bipolar MMC-HVDC system of puppet based on RT-LAB is for the test of Practical Project; And the half-practicality imitation test method of complete bipolar MMC-HVDC system based on RT-LAB so far there are no Patents or bibliographical information.Therefore, design a kind of half-practicality imitation test method of the complete bipolar MMC-HVDC system based on RT-LAB and the interface of RT-LAB and external control protective device seems particularly important.
Summary of the invention
The object of the present invention is to provide a kind of flexible DC power transmission semi-matter simulating system based on modularization multi-level converter; make the hardware-in-the-loop simulation of complete bipolar MMC-HVDC system can be applied to Practical Project test, thereby make the test of control protective unit more approach practical application.
For solving the problems of the technologies described above, embodiments of the present invention provide a kind of flexible DC power transmission semi-matter simulating system based on modularization multi-level converter, comprise: at least one on-site programmable gate array FPGA replicating machine, Digital Simulation main frame, input and output IO extended housing and the interconnected expansion bus PCIe of peripheral hardware switch;
Described FPGA replicating machine is for realizing the real-time simulation of the bipolar valve control of converting plant and valve body model or the bipolar valve control of Inverter Station and valve body model;
Described Digital Simulation main frame is for realizing the real-time simulation of MMC-HVDC system ac and dc systems;
Described IO extended housing is used for connecting MMC-HVDC and controls protection cabinet;
Described Digital Simulation main frame, described FPGA replicating machine and described IO extended housing are interconnected by described PCIe switch.
The present invention in terms of existing technologies, realize the real-time simulation of the bipolar valve control of converting plant and valve body model or the bipolar valve control of Inverter Station and valve body model by FPGA replicating machine, Digital Simulation main frame is realized the real-time simulation of ac and dc systems in MMC-HVDC system, IO extended housing connects MMC-HVDC and controls protection cabinet, and by Digital Simulation main frame, FPGA replicating machine and IO extended housing are interconnected by PCIe switch, can completely realizes the semi-hardware type simulation test of complete bipolar MMC-HVDC system under RT-LAB, for complete bipolar MMC-HVDC systematic research and engineering test provide a set of emulation testing scheme, thereby the hardware-in-the-loop simulation that makes complete bipolar MMC-HVDC system can be applied to Practical Project test, the test of control protective unit is more approached to practical application.
In addition; described FPGA replicating machine and described MMC-HVDC control between protection cabinet and adopt two-way optic communication links to carry out information transmission; realize converting plant or Inverter Station and MMC-HVDC and control the interface signal processing between protection cabinet, can make information transmit fairly simple, quick.
In addition, described MMC-HVDC semi-matter simulating system comprises one for realizing the FPGA replicating machine of the bipolar valve control of converting plant and valve body model real-time simulation;
Described MMC-HVDC controls protection cabinet and comprises anodal MMC Rectifier control protective device and negative pole MMC Rectifier control protective device; Described IO extended housing connects described anodal MMC Rectifier control protective device and described negative pole MMC Rectifier control protective device;
Described anodal MMC Rectifier control protective device and described negative pole MMC Rectifier control protective device send to respectively described FPGA replicating machine by the reference voltage modulating wave of each brachium pontis by described two-way optic communication links respectively; Described FPGA replicating machine feeds back to respectively described anodal MMC Rectifier control protective device and described negative pole MMC Rectifier control protective device by converter valve bridge arm voltage and current information in described converting plant by described two-way optic communication links.
Such scheme, for single end testing or the debugging of Rectifier control protective device, is only tested for Rectifier control protective device, can get rid of the interference of other devices, further makes simulation result more accurate.
In addition, described MMC-HVDC semi-matter simulating system comprises one for realizing the FPGA replicating machine of the bipolar valve control of Inverter Station and valve body model real-time simulation;
Described MMC-HVDC controls protection cabinet and comprises anodal MMC Inverter control protective device and negative pole MMC Inverter control protective device; Described IO extended housing connects described anodal MMC Inverter control protective device and described negative pole MMC Inverter control protective device;
Described anodal MMC Inverter control protective device and described negative pole MMC Inverter control protective device send to respectively described FPGA replicating machine by the reference voltage modulating wave of each brachium pontis by described two-way optic communication links respectively; Described FPGA replicating machine feeds back to respectively described anodal MMC Inverter control protective device and described negative pole MMC Inverter control protective device by converter valve bridge arm voltage and current information in described Inverter Station by two-way optic communication links.
Such scheme, for single end testing or the debugging of Inverter control protective device, is only tested for Inverter control protective device, can get rid of the interference of other devices, further makes simulation result more accurate.
In addition, described MMC-HVDC semi-matter simulating system comprises one for realizing a FPGA replicating machine of the bipolar valve control of converting plant and valve body model real-time simulation and one for realizing the 2nd FPGA replicating machine of the bipolar valve control of Inverter Station and valve body model real-time simulation;
Described MMC-HVDC controls protection cabinet and comprises anodal MMC Rectifier control protective device, negative pole MMC Rectifier control protective device, anodal MMC Inverter control protective device and negative pole MMC Inverter control protective device; Described IO extended housing connects described anodal MMC Rectifier control protective device, described negative pole MMC Rectifier control protective device, described anodal MMC Inverter control protective device and described negative pole MMC Inverter control protective device;
Described anodal MMC Rectifier control protective device and described negative pole MMC Rectifier control protective device send to respectively a described FPGA replicating machine by the reference voltage modulating wave of each brachium pontis by described two-way optic communication links respectively; A described FPGA replicating machine feeds back to respectively described anodal MMC Rectifier control protective device and described negative pole MMC Rectifier control protective device by converter valve bridge arm voltage and current information in described converting plant by described two-way optic communication links;
Described anodal MMC Inverter control protective device and described negative pole MMC Inverter control protective device send to respectively described the 2nd FPGA replicating machine by the reference voltage modulating wave of each brachium pontis by described two-way optic communication links respectively; Described the 2nd FPGA replicating machine feeds back to respectively described anodal MMC Inverter control protective device and described negative pole MMC Inverter control protective device by converter valve bridge arm voltage and current information in described Inverter Station by described two-way optic communication links.
Such scheme is for Dual-Ended Loop Test or the debugging of converting plant and Inverter control protective device, and function and the performance that can test converting plant and Inverter control protective device, make simulation result more approach practical application.
In addition, described Digital Simulation main frame and described IO extended housing are mutual, realize ac and dc systems and MMC-HVDC in MMC-HVDC system and control the interface signal processing between protection cabinet;
Wherein, the interactive information of described Digital Simulation main frame and described IO extended housing comprises: the digital switch quantity of the analog quantity of electric current, voltage and control isolating switch, isolation switch.
In addition, described Digital Simulation main frame comprises the real-time simulation of ac and dc systems in MMC-HVDC system: the real-time simulation of the brachium pontis inductance of power supply, transformer, isolating switch, isolation switch and valve body to rectification side and inversion side.
In addition, described Digital Simulation main frame, described FPGA replicating machine and described IO extended housing are interconnected by line synchro, realize emulated data synchronisation, make the emulation of system under scale, carry out at one time, thereby make simulation result more accurate.
The mathematical model of the bipolar valve control of converting plant and MMC valve body that what in addition, described FPGA replicating machine adopted realize or the mathematical model of the bipolar valve control of Inverter Station and MMC valve body are determined according to the topological structure of described MMC.That is to say, user can determine mathematical model according to actual needs, thus make semi-matter simulating system range of application of the present invention more extensively, more flexible.
Accompanying drawing explanation
Fig. 1 is according to the bipolar MMC-HVDC system architecture of the puppet of prior art;
Fig. 2 is the complete bipolar MMC-HVDC system architecture according to prior art;
Fig. 3 is the MMC-HVDC semi-matter simulating system structural drawing according to first embodiment of the invention;
Fig. 4 is the topological structure schematic diagram of three-phase MMC;
Fig. 5 is the sub modular structure schematic diagram of MMC;
Fig. 6 is according to the synchronous wiring schematic diagram of the MMC-HVDC semi-matter simulating system of first embodiment of the invention;
Fig. 7 is the MMC-HVDC semi-matter simulating system structural drawing according to second embodiment of the invention;
Fig. 8 is according to the synchronous wiring schematic diagram of the MMC-HVDC semi-matter simulating system of second embodiment of the invention;
Fig. 9 is the MMC-HVDC semi-matter simulating system structural drawing according to four embodiment of the invention;
Figure 10 is according to the synchronous wiring schematic diagram of the MMC-HVDC semi-matter simulating system of four embodiment of the invention.
Embodiment
For making the object, technical solutions and advantages of the present invention clearer, below in conjunction with accompanying drawing, the embodiments of the present invention are explained in detail.But, persons of ordinary skill in the art may appreciate that in the each embodiment of the present invention, in order to make reader understand the application better, many ins and outs are proposed.But, even without these ins and outs and the many variations based on following embodiment and modification, also can realize the each claim of the application technical scheme required for protection.
The first embodiment of the present invention relates to a kind of MMC-HVDC semi-matter simulating system, as shown in Figure 3, this system comprises: at least one on-site programmable gate array FPGA replicating machine, Digital Simulation main frame, input and output IO extended housing and the interconnected expansion bus PCIe of peripheral hardware switch; Adopt PCIe expansion bus that Digital Simulation main frame, FPGA replicating machine and IO extended housing is interconnected by PCIe switch.
Because hardware-in-the-loop simulation (hardware-in-loop simulation) is that controller (material object) and the realistic model (being mathematical simulation) of the control object realizing on simulation computer are linked together to the technology of testing.In this test, the dynamic perfromance of controller, static characteristics and non-linear factor etc. can reflect truly, and therefore it is a kind of l-G simulation test technology of more approaching reality.This emulation technology can be used for change control device and designs (before in controller is not yet installed to real system, carry out the design performance of access control device by hardware-in-the-loop simulation, if system performance index does not meet design requirement, the parameter of capable of regulating controller, or the design of change control device), the while is also widely used in the aspects such as modification sizing, product remodeling and the factory inspection of product.The feature of hardware-in-the-loop simulation is: can only be 1. real-time simulation, the time ruler of realistic model be identical with natural time scale.2. need to solve the interface problem between controller and simulation computer.3. the experimental result of hardware-in-the-loop simulation is than the more approaching reality of mathematical simulation.
Therefore, can utilize the Digital Simulation main frame of Real Time Digital Simulator RT-LAB to realize the real-time simulation of ac and dc systems in MMC-HVDC system, such as Digital Simulation main frame comprises the real-time simulation of ac and dc systems in MMC-HVDC system: the real-time simulation of the brachium pontis inductance of power supply, transformer, isolating switch, isolation switch and valve body to rectification side and inversion side.Utilize the FPGA replicating machine of Real Time Digital Simulator RT-LAB to realize the real-time simulation of the bipolar valve control of converting plant and valve body model or the bipolar valve control of Inverter Station and valve body model, IO extended housing connects MMC-HVDC and controls protection cabinet.
What deserves to be explained is, the mathematical model of the bipolar valve control of converting plant and MMC valve body that what FPGA replicating machine adopted realize or the mathematical model of the bipolar valve control of Inverter Station and MMC valve body are determined according to the topological structure of MMC.That is to say, user can determine mathematical model according to actual needs, thus make semi-matter simulating system range of application of the present invention more extensively, more flexible.There are at present much achievements in research about MMC topological structure and mathematical model thereof, all in the present invention available, only need to write corresponding FPGA burning program in FPGA replicating machine according to different mathematical models, emphasis of the present invention is not MMC topological structure and mathematical model thereof, it is not expanded at this.Present embodiment describes as an example of a kind of three-phase six bridge arm topological structures example, but the invention is not restricted to this topological structure, in actual applications, can specifically select as required MMC topological structure and mathematical model thereof.
Be the topological structure schematic diagram of three-phase MMC as shown in Figure 4, a modularization multi-level converter (MMC) is composed in parallel by three facies units, and each facies unit is divided into upper and lower two brachium pontis; One side of brachium pontis is connected in ac output end, and opposite side is connected in DC output end; Each brachium pontis is in series by submodule and the brachium pontis reactance of equal number, and brachium pontis reactance can be concentrated and is connected between converter valve and ac output end, also can disperse to connect with submodule.The structure of submodule is formed by simple half-bridge structure and Capacitance parallel connection, is composed in parallel in other words by two-way electronic power switch of opening electronic power switch identical with another and the concatermer of electric capacity.All submodule cascaded structures are called valve.Specifically, Ua1, Ua2....Uan represent that a goes up n submodule of brachium pontis mutually, Ua (n+1), Ua (n+2) ... ..Ua (2n) represents that a descends n submodule of brachium pontis mutually, Ub1, Ub2....Ubn represent that b goes up n submodule of brachium pontis mutually, Ub (n+1), Ub (n+2) ... ..Ub (2n) represents that b descends n submodule of brachium pontis mutually, Uc1, Uc2....Ucn represent that c goes up n submodule of brachium pontis mutually, Uc (n+1), Uc (n+2) ... ..Uc (2n) represents that c descends n submodule of brachium pontis mutually, altogether 6 brachium pontis.The sub modular structure schematic diagram of MMC as shown in Figure 5, it is by 2 insulated gate bipolar transistors (Insulated Gate Bipolar Transistor, be called for short " IGBT ") T1, T2 and anti-paralleled diode D1, D2, and capacitor C 0 forms, by controlling the input of submodule and cutting out many level staircase waveform matching simple alternating current waveform that superposes out.
The interface problem that Real Time Digital Simulator RT-LAB and MMC-HVDC control between protection cabinet can be processed in the following manner:
FPGA replicating machine and MMC-HVDC control between protection cabinet and adopt two-way optic communication links to carry out information transmission, realize converting plant or Inverter Station and MMC-HVDC and control the interface signal processing between protection cabinet.
Specifically, the main FPGA that is used for the FPGA replicating machine of realizing the bipolar valve control of converting plant and valve body model realizes converting plant two-way optic communication links communication protocol and resolves, the information of one of them communication protocol transmission comprises that a that anodal MMC Rectifier control protective device sends goes up brachium pontis mutually, a descends brachium pontis mutually, b goes up brachium pontis mutually, b descends brachium pontis mutually, c goes up brachium pontis mutually, c descends the brachium pontis reference voltage modulating wave of totally 6 MMC brachium pontis mutually, the information of another communication protocol transmission comprises that a that negative pole MMC Rectifier control protective device sends goes up brachium pontis mutually, a descends brachium pontis mutually, b goes up brachium pontis mutually, b descends brachium pontis mutually, c goes up brachium pontis mutually, c descends the brachium pontis reference voltage modulating wave of totally 6 MMC brachium pontis mutually.
Or, the main FPGA that is used for the FPGA replicating machine of realizing the bipolar valve control of Inverter Station and valve body model realizes the communication protocol parsing of Inverter Station two-way optic communication links, the information of one of them communication protocol transmission comprises that a that anodal MMC Inverter control protective device sends goes up brachium pontis mutually, a descends brachium pontis mutually, b goes up brachium pontis mutually, b descends brachium pontis mutually, c goes up brachium pontis mutually, c descends the brachium pontis reference voltage modulating wave of totally 6 MMC brachium pontis mutually, the information of another communication protocol transmission comprises that a that negative pole MMC Inverter control protective device sends goes up brachium pontis mutually, a descends brachium pontis mutually, b goes up brachium pontis mutually, b descends brachium pontis mutually, c goes up brachium pontis mutually, c descends the brachium pontis reference voltage modulating wave of totally 6 MMC brachium pontis mutually.In actual use, can on FPGA replicating machine, configure optical fiber interface plate, for realizing the conversion of photosignal, receive reference voltage modulating wave information by this optical fiber interface plate.
In addition, Digital Simulation main frame and IO extended housing are mutual, realize ac and dc systems and MMC-HVDC in MMC-HVDC system and control the interface signal processing between protection cabinet; Wherein, the interactive information of Digital Simulation main frame and IO extended housing comprises: the digital switch quantity of the analog quantity of electric current, voltage and control isolating switch, isolation switch.
In addition, it should be noted that, in the present embodiment, between FPGA replicating machine and IO extended housing, adopt two-way optic communication links to carry out information transmission, realize converting plant or Inverter Station and MMC-HVDC and control the interface signal processing between protection cabinet; Can make information transmit fairly simple, quick.In actual applications, the communication protocol of employing comprises HDLC(high-level data link control procedure), gigabit Ethernet, Aurora etc., be all the more common communication protocol in the communications field, this is no longer going to repeat them.
In order to realize emulated data synchronisation, each Digital Simulation main frame, FPGA replicating machine and IO extended housing is interconnected by line synchro, make the emulation of system under scale, carry out at one time, thereby make simulation result more accurate.Specifically, as shown in Figure 6, the transmitting terminal (TX) of Digital Simulation main frame connects the receiving end (RX) of IO extended housing, the transmitting terminal (TX) of IO extended housing connects the receiving end (RX) of FPGA replicating machine 1, the transmitting terminal (TX) of a FPGA replicating machine is connected with the receiving end (RX) of next FPGA replicating machine, until all FPGA replicating machines are all connected.
Compared with prior art, present embodiment realizes the real-time simulation of the bipolar valve control of converting plant and valve body model or the bipolar valve control of Inverter Station and valve body model by FPGA replicating machine, Digital Simulation main frame is realized the real-time simulation of ac and dc systems in MMC-HVDC system, IO extended housing connects MMC-HVDC and controls protection cabinet, and by Digital Simulation main frame, FPGA replicating machine and IO extended housing are interconnected by PCIe switch, can completely realizes the semi-hardware type simulation test of complete bipolar MMC-HVDC system under RT-LAB, for complete bipolar MMC-HVDC systematic research and engineering test provide a set of emulation testing scheme, thereby the hardware-in-the-loop simulation that makes complete bipolar MMC-HVDC system can be applied to Practical Project experiment, the test of control protective unit is more approached to practical application.
The second embodiment of the present invention relates to a kind of MMC-HVDC semi-matter simulating system.The second embodiment and the first embodiment are roughly the same; key distinction part is: in the first embodiment; comprise multiple FPGA replicating machines and realize the real-time simulation of the bipolar valve control of multiterminal MMC-HVDC current conversion station and valve body model, or each current conversion station control protective unit test in multiterminal MMC-HVDC current conversion station.And in second embodiment of the invention; only comprise one for realizing the FPGA replicating machine of the bipolar valve control of converting plant and valve body model real-time simulation; for single end testing or the debugging of Rectifier control protective device; only test for Rectifier control protective device; can get rid of the interference of other devices, further make simulation result more accurate.
Shown in Fig. 7, be the semi-matter simulating system structural drawing of the MMC-HVDC of present embodiment, Fig. 8 is the synchronous wiring schematic diagram of the semi-matter simulating system of the MMC-HVDC of present embodiment.In the present embodiment, utilize the Digital Simulation main frame of Real Time Digital Simulator RT-LAB to realize the real-time simulation of ac and dc systems in MMC-HVDC system, utilize the FPGA replicating machine of Real Time Digital Simulator RT-LAB to realize the real-time simulation of the bipolar valve control of converting plant and valve body model, MMC-HVDC controls protection cabinet and comprises anodal MMC Rectifier control protective device and negative pole MMC Rectifier control protective device; IO extended housing connects anodal MMC Rectifier control protective device and negative pole MMC Rectifier control protective device.Anodal MMC Rectifier control protective device and negative pole MMC Rectifier control protective device send to respectively FPGA replicating machine by the reference voltage modulating wave of each brachium pontis by two-way optic communication links respectively; FPGA replicating machine is crossed two-way optic communication links by information exchanges such as converter valve bridge arm voltage and electric currents in converting plant and is fed back to respectively anodal MMC Rectifier control protective device and negative pole MMC Rectifier control protective device.
Third embodiment of the invention relates to a kind of MMC-HVDC semi-matter simulating system; the 3rd embodiment and the first embodiment are roughly the same; key distinction part is: in the first embodiment; comprise multiple FPGA replicating machines and realize the real-time simulation of the bipolar valve control of multiterminal MMC-HVDC current conversion station and valve body model, for the each current conversion station control protective unit test of multiterminal MMC-HVDC current conversion station.And in third embodiment of the invention; only comprise one for realizing the FPGA replicating machine of the bipolar valve control of Inverter Station and valve body model real-time simulation; for single end testing or the debugging of Inverter control protective device; only test for Inverter control protective device; can get rid of the interference of other devices, further make simulation result more accurate.
Its system construction drawing and synchronous wiring diagram are similar with Fig. 7 and Fig. 8 respectively, utilize the Digital Simulation main frame of Real Time Digital Simulator RT-LAB to realize the real-time simulation of ac and dc systems in MMC-HVDC system, utilize the FPGA replicating machine of Real Time Digital Simulator RT-LAB to realize the real-time simulation of the bipolar valve control of Inverter Station and valve body model, MMC-HVDC controls protection cabinet and comprises anodal MMC Inverter control protective device and negative pole MMC Inverter control protective device; IO extended housing connects anodal MMC Inverter control protective device and negative pole MMC Inverter control protective device.Anodal MMC Inverter control protective device and negative pole MMC Inverter control protective device send to respectively FPGA replicating machine by the reference voltage modulating wave of each brachium pontis by two-way optic communication links respectively; FPGA replicating machine is crossed two-way optic communication links by information exchanges such as converter valve bridge arm voltage and electric currents in Inverter Station and is fed back to respectively anodal MMC Inverter control protective device and negative pole MMC Inverter control protective device.
Four embodiment of the invention relates to a kind of MMC-HVDC semi-matter simulating system.The 4th embodiment and the first embodiment are roughly the same; key distinction part is: in the first embodiment; comprise multiple FPGA replicating machines and realize the real-time simulation of the bipolar valve control of multiterminal MMC-HVDC current conversion station and valve body model, test for multiterminal MMC-HVDC current conversion station control protective unit.And in four embodiment of the invention; comprise one for realizing a FPGA replicating machine of the bipolar valve control of converting plant and valve body model real-time simulation and one for realizing the 2nd FPGA replicating machine of the bipolar valve control of Inverter Station and valve body model real-time simulation; for Dual-Ended Loop Test or the debugging of Rectifier control protective device and Inverter control protective device; can test function and the performance of converting plant and Inverter control protective device, make simulation result more approach practical application.
Shown in Fig. 9, being the semi-matter simulating system structural drawing of the MMC-HVDC of present embodiment, is the synchronous wiring schematic diagram of the semi-matter simulating system of the MMC-HVDC of present embodiment shown in Figure 10.In the present embodiment, utilize the Digital Simulation main frame of Real Time Digital Simulator RT-LAB to realize the real-time simulation of ac and dc systems in MMC-HVDC system, utilize a FPGA replicating machine of Real Time Digital Simulator RT-LAB to realize the real-time simulation of the bipolar valve control of converting plant and valve body model, utilize another FPGA replicating machine of Real Time Digital Simulator RT-LAB to realize the real-time simulation of the bipolar valve control of Inverter Station and valve body model, MMC-HVDC controls protection cabinet and comprises anodal MMC Rectifier control protective device, negative pole MMC Rectifier control protective device, anodal MMC Inverter control protective device and negative pole MMC Inverter control protective device, IO extended housing connects anodal MMC Rectifier control protective device, negative pole MMC Rectifier control protective device, anodal MMC Inverter control protective device and negative pole MMC Inverter control protective device.
Anodal MMC Rectifier control protective device and negative pole MMC Rectifier control protective device send to respectively a FPGA replicating machine by the reference voltage modulating wave of each brachium pontis by two-way optic communication links respectively; The one FPGA replicating machine is crossed two-way optic communication links by information exchanges such as converter valve bridge arm voltage and electric currents in converting plant and is fed back to respectively anodal MMC Rectifier control protective device and negative pole MMC Rectifier control protective device.
Anodal MMC Inverter control protective device and negative pole MMC Inverter control protective device send to respectively the 2nd FPGA replicating machine by the reference voltage modulating wave of each brachium pontis by two-way optic communication links respectively; The 2nd FPGA replicating machine is crossed two-way optic communication links by information exchanges such as converter valve bridge arm voltage and electric currents in Inverter Station and is fed back to anodal MMC Inverter control protective device and negative pole MMC Inverter control protective device.
Be described as follows:
1. utilize a namely FPGA replicating machine of a FPGA replicating machine A(of Real Time Digital Simulator RT-LAB) in main FPGA realize converting plant two-way optic communication links communication protocol resolve.The information of one of them communication protocol transmission comprises that a that anodal MMC current conversion station control protective unit sends goes up mutually brachium pontis, a and descends mutually brachium pontis, b to go up mutually brachium pontis, b to descend mutually brachium pontis, c to go up mutually brachium pontis, c to descend mutually the brachium pontis reference voltage modulating wave of totally 6 MMC brachium pontis, and the information of another communication protocol transmission comprises that a that negative pole MMC current conversion station control protective unit sends goes up mutually brachium pontis, a and descends mutually brachium pontis, b to go up mutually brachium pontis, b to descend mutually brachium pontis, c to go up mutually brachium pontis, c to descend mutually the brachium pontis reference voltage modulating wave of totally 6 MMC brachium pontis.
2. utilize namely the 2nd FPGA replicating machine of FPGA replicating machine B() in main FPGA realize Inverter Station two-way optic communication links communication protocol resolve.The information of one of them communication protocol transmission comprises that a that the anodal control protective unit of MMC Inverter Station sends goes up mutually brachium pontis, a and descends mutually brachium pontis, b to go up mutually brachium pontis, b to descend mutually brachium pontis, c to go up mutually brachium pontis, c to descend mutually the brachium pontis reference voltage modulating wave of totally 6 MMC brachium pontis, and the information of another communication protocol transmission comprises that a that MMC Inverter Station negative pole control protective unit sends goes up mutually brachium pontis, a and descends mutually brachium pontis, b to go up mutually brachium pontis, b to descend mutually brachium pontis, c to go up mutually brachium pontis, c to descend mutually the brachium pontis reference voltage modulating wave of totally 6 MMC brachium pontis.
3. utilize spread F PGA in FPGA replicating machine A to realize the mathematical model of the bipolar valve control of converting plant and MMC valve body in both-end MMC-HVDC.Utilize spread F PGA in FPGA replicating machine B to realize the mathematical model of the bipolar valve control of Inverter Station and MMC valve body in both-end MMC-HVDC.Because the clock frequency of FPGA computing is very high, can realize the mathematical model of high-precision valve control and MMC valve body.
4. utilize a real-timedigital simulation host C to realize the real-time simulation of ac and dc systems in MMC-HVDC system; Wherein, comprise the brachium pontis inductance of rectification side power supply, transformer, isolating switch, isolation switch and valve body, and the electrical equipment such as the brachium pontis inductance of inversion side power supply, transformer, isolating switch, isolation switch and valve body.
5. utilizing real-timedigital simulation host C and 1 IO(Input/Output, signal input output interface) extended housing is realized and MMC-HVDC controls the interaction process of protecting cabinet IO signal; Wherein, mainly comprise the analog quantity of various electric currents, voltage and control the digital switch quantity of isolating switch, isolation switch.
6. utilize the optical fiber interface plate of FPGA replicating machine A realize with both-end MMC-HVDC in the signaling interface processing of Rectifier control protection cabinet, utilize the optical fiber interface plate of FPGA replicating machine B realize with both-end MMC-HVDC in the signaling interface processing of Inverter control protection cabinet.
7. adopt PCIe expansion bus that each Digital Simulation main frame, FPGA replicating machine and IO extended housing is interconnected by PCIe switch.
By each Digital Simulation main frame, FPGA replicating machine and IO extended housing by the interconnected emulated data synchronisation that realizes of line synchro.
Can completely of the present invention realizes the semi-hardware type simulation test of complete bipolar MMC-HVDC system under RT-LAB, for complete bipolar MMC-HVDC systematic research and engineering test provide a set of emulation testing scheme.
Persons of ordinary skill in the art may appreciate that the respective embodiments described above are to realize specific embodiments of the invention, and in actual applications, can do various changes to it in the form and details, and without departing from the spirit and scope of the present invention.
Claims (10)
1. the flexible DC power transmission MMC-HVDC semi-matter simulating system based on modularization multi-level converter, it is characterized in that, comprise: at least one on-site programmable gate array FPGA replicating machine, Digital Simulation main frame, input and output IO extended housing and the interconnected expansion bus PCIe of peripheral hardware switch;
Described FPGA replicating machine is for realizing the real-time simulation of the bipolar valve control of converting plant and valve body model or the bipolar valve control of Inverter Station and valve body model;
Described Digital Simulation main frame is for realizing the real-time simulation of MMC-HVDC system ac and dc systems;
Described IO extended housing is used for connecting MMC-HVDC and controls protection cabinet;
Described Digital Simulation main frame, described FPGA replicating machine and described IO extended housing are interconnected by described PCIe switch.
2. MMC-HVDC semi-matter simulating system according to claim 1, is characterized in that, described FPGA replicating machine and described MMC-HVDC control between protection cabinet and adopt two-way optic communication links to carry out information transmission.
3. MMC-HVDC semi-matter simulating system according to claim 2, is characterized in that, described MMC-HVDC semi-matter simulating system comprises one for realizing the FPGA replicating machine of the bipolar valve control of converting plant and valve body model real-time simulation;
Described MMC-HVDC controls protection cabinet and comprises anodal MMC Rectifier control protective device and negative pole MMC Rectifier control protective device; Described IO extended housing connects described anodal MMC Rectifier control protective device and described negative pole MMC Rectifier control protective device;
Described anodal MMC Rectifier control protective device and described negative pole MMC Rectifier control protective device send to respectively described FPGA replicating machine by the reference voltage modulating wave of each brachium pontis by described two-way optic communication links respectively; Described FPGA replicating machine feeds back to respectively described anodal MMC Rectifier control protective device and described negative pole MMC Rectifier control protective device by converter valve bridge arm voltage and current information in described converting plant by described two-way optic communication links.
4. MMC-HVDC semi-matter simulating system according to claim 2, is characterized in that, described MMC-HVDC semi-matter simulating system comprises one for realizing the FPGA replicating machine of the bipolar valve control of Inverter Station and valve body model real-time simulation;
Described MMC-HVDC controls protection cabinet and comprises anodal MMC Inverter control protective device and negative pole MMC Inverter control protective device; Described IO extended housing connects described anodal MMC Inverter control protective device and described negative pole MMC Inverter control protective device;
Described anodal MMC Inverter control protective device and described negative pole MMC Inverter control protective device send to respectively described FPGA replicating machine by the reference voltage modulating wave of each brachium pontis by described two-way optic communication links respectively; Described FPGA replicating machine feeds back to respectively described anodal MMC Inverter control protective device and described negative pole MMC Inverter control protective device by converter valve bridge arm voltage and current information in described Inverter Station by described two-way optic communication links.
5. MMC-HVDC semi-matter simulating system according to claim 2, it is characterized in that, described MMC-HVDC semi-matter simulating system comprises one for realizing a FPGA replicating machine of the bipolar valve control of converting plant and valve body model real-time simulation and one for realizing the 2nd FPGA replicating machine of the bipolar valve control of Inverter Station and valve body model real-time simulation;
Described MMC-HVDC controls protection cabinet and comprises anodal MMC Rectifier control protective device, negative pole MMC Rectifier control protective device, anodal MMC Inverter control protective device and negative pole MMC Inverter control protective device; Described IO extended housing connects described anodal MMC Rectifier control protective device, described negative pole MMC Rectifier control protective device, described anodal MMC Inverter control protective device and described negative pole MMC Inverter control protective device;
Described anodal MMC Rectifier control protective device and described negative pole MMC Rectifier control protective device send to respectively a described FPGA replicating machine by the reference voltage modulating wave of each brachium pontis by described two-way optic communication links respectively; A described FPGA replicating machine feeds back to respectively described anodal MMC Rectifier control protective device and described negative pole MMC Rectifier control protective device by converter valve bridge arm voltage and current information in described converting plant by described two-way optic communication links;
Described anodal MMC Inverter control protective device and described negative pole MMC Inverter control protective device send to respectively described the 2nd FPGA replicating machine by the reference voltage modulating wave of each brachium pontis by described two-way optic communication links respectively; Described the 2nd FPGA replicating machine feeds back to respectively described anodal MMC Inverter control protective device and described negative pole MMC Inverter control protective device by converter valve bridge arm voltage and current information in described Inverter Station by described two-way optic communication links.
6. MMC-HVDC semi-matter simulating system according to claim 2, is characterized in that, on described FPGA replicating machine, configures optical fiber interface plate, for realizing the conversion of photosignal.
7. MMC-HVDC semi-matter simulating system according to claim 1, it is characterized in that, described Digital Simulation main frame and described IO extended housing are mutual, realize ac and dc systems and MMC-HVDC in MMC-HVDC system and control the interface signal processing between protection cabinet;
Wherein, the interactive information of described Digital Simulation main frame and described IO extended housing comprises: the digital switch quantity of the analog quantity of electric current, voltage and control isolating switch, isolation switch.
8. according to MMC-HVDC semi-matter simulating system claimed in claim 1, it is characterized in that, described Digital Simulation main frame comprises the real-time simulation of ac and dc systems in MMC-HVDC system: the real-time simulation of the brachium pontis inductance of power supply, transformer, isolating switch, isolation switch and valve body to rectification side and inversion side.
9. MMC-HVDC semi-matter simulating system according to claim 1, is characterized in that, described Digital Simulation main frame, described FPGA replicating machine and described IO extended housing are by the interconnected emulated data synchronisation that realizes of line synchro.
10. MMC-HVDC semi-matter simulating system according to claim 1, it is characterized in that, the mathematical model of the bipolar valve control of converting plant and MMC valve body that what described FPGA replicating machine adopted realize or the mathematical model of the bipolar valve control of Inverter Station and MMC valve body are determined according to the topological structure of described MMC.
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