CN104914734B - A kind of mixed DC closed loop test system and implementation method - Google Patents
A kind of mixed DC closed loop test system and implementation method Download PDFInfo
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Abstract
The present invention provides a kind of mixed DC closed loop test system and implementation method, include the mixed DC real-time emulation system for establishing that receiving end is flexible direct current, by sending end be the customary DC based on thyristor half control device, receiving end is the flexible direct current based on IGBT full-controlled devices, AC system, alternating current filter, ac bus, AC circuit breaker and connects customary DC and the big step-length interface circuit of flexible direct current and small step-length interface circuit is formed；Closed loop test pilot system is formed by Real Time Digital Simulator simulation mixed DC system and MMC simulators, MMC valve control device, MMC unit controls protection device, I O board card, photoelectric conversion device, the LCC valve arrangements of customary DC, LCC unit control protection devices and mixed DC system coordination control device with analog module multilevel converter.The present invention provides effective test method for the control protection feature research of mixed DC and its closed test, simple, convenient.
Description
Technical field
Patent of the present invention is related to HVDC Transmission Technology and its closed test, and more particularly to a kind of sending end is customary DC receiving end
For the closed loop test system and its implementation of the mixed DC of flexible direct current.
Background technology
In customary DC power transmission engineering, the current widely used line commutation transverter (Line- based on thyristor
Communicated Converter, LCC), transmit electricity at a distance occasion especially suitable for large capacity high voltage, but for receiving end
There are the problem of commutation failure for weak pattern system.In recent years as the development of the new energy such as wind-power electricity generation, flexible DC transmission technology obtain
Concern and engineer application to domestic and international more and more experts and scholars.Flexible direct current uses the module based on full-controlled devices such as IGBT
Change multilevel converter (Voltage Source Converter, VSC), control is more flexible compared with customary DC, realizes work(
The four-quadrant control of rate, particularly there is no commutation problem, accesses power grid suitable for new energy and powers to passive network etc.
Occasion.
The advantage and disadvantage of comprehensive customary DC and flexible direct current, a kind of to use sending end for customary DC receiving end be flexible direct current
Mixed DC, available for customary DC is overcome, to receiving end weak pattern system, there are the problem of commutation failure.The present invention provides one kind by
Hold the implementation method of the mixed DC closed loop test system for flexible direct current, for mixed DC control protection feature research and its
Closed test provides effective test method, simple, convenient.
The content of the invention
It is an object of the invention to provide a kind of mixed DC closed loop test system of receiving end for flexible direct current and realization side
Method, protection feature research and its closed test are controlled for solving the mixed DC system that receiving end is flexible direct current, for study by
The control protection feature of the mixed DC system for flexible direct current is held to provide effective test platform and method.
The above-mentioned purpose of the present invention is realized by following technological means：
The present invention provides the mixed DC closed loop test system that a kind of receiving end is flexible direct current, and it is mixed by simulating to include foundation
Close the Real Time Digital Simulator, real-time simulation work station, the MMC emulation dresses of analog module multilevel converter of straight-flow system
Put, MMC valve control device, MMC unit controls protection device, I O board card, photoelectric conversion device, the LCC valve arrangements of customary DC, LCC
The closed loop test system that unit control protection device and mixed DC system coordination control device are formed.
The mixed DC system simulated in real-time simulator includes AC system, alternating current filter, exchange mother
Line, AC circuit breaker, customary DC unit, flexible direct current unit and big step-length interface circuit and small step-length interface circuit；
The alternating current filter is parallel to the ac bus of customary DC side, the customary DC unit and flexible direct current list
The DC side of member is interconnected by the big step-length interface circuits of 50us and the small step-length interface circuits of 2.5us respectively, and exchange side passes through exchange
Breaker is connected on the ac bus；
The customary DC include three-phase three winding converter power transformer, the 12 pulse conversion devices LCC based on thyristor with
And direct current reactor；The three-phase three winding converter power transformer is connected by AC circuit breaker with ac bus；12 pulsation
The DC side of transverter is connected by direct current reactor with big step-length interface circuit；The exchange side of 12 pulse conversion devices passes through
Two 6 pulse conversion units are connected with the Y windings and D windings of three-phase three-winding transformer secondary side respectively；6 pulse conversion
Unit is made of three thyristor groups parallel connections, and each thyristor groups are made of two thyristors connected, and two 6 pulse conversions
The tie point of circuit is parallel with grounding switch；
The flexible direct current includes modularization multi-level converter MMC, three-phase double winding tietransformer, by-pass switch
And start resistance；The primary side of the three-phase double winding tietransformer is connected to the AC circuit breaker, secondary side connection
In the startup resistance；The by-pass switch is parallel to startup resistance, and it is more that the other end for starting resistance is connected to modularization
The exchange side of level converter.The DC side of the modularization multi-level converter is connect by small step-length interface circuit with big step-length
Mouth line road interconnects.Modularization multi-level converter is made of six bridge arms of three-phase, and each bridge arm is by a bridge arm reactor and more
A submodule composition；
The submodule includes the first IGBT pipes, the 2nd IGBT pipes, manages antiparallel one or two pole with the first IGBT respectively
Pipe, the second diode antiparallel with the 2nd IGBT pipes and capacitor are formed；The collector and second of the first IGBT pipes
The emitter connection of IGBT pipes, described capacitor one end is connected with the emitter of the first IGBT pipes, the capacitor other end and
The collector connection of 2nd IGBT pipes.
The PB5 processing board cards of real-time simulation work station and Real Time Digital Simulator are connected by cable, are mixed for calculating
The electrical network of straight-flow system；The small step-lengths of 2.5us for being simulated flexible direct current respectively using the PB5 boards of Real Time Digital Simulator are imitated
Very, and the big step-lengths of the 50us of customary DC and other circuits emulate.Two pieces of PB5 boards pass through Real Time Digital Simulator
Backboard communicates, and is connected with optical fiber.
PB5 boards in the Real Time Digital Simulator are connected by optical fiber with I O board card, are used for realization analog quantity sum number
The input and output of word amount signal；PB5 boards are connected by optical fiber with modularization multi-level converter MMC simulators, for MMC
Model emulation；MMC simulators are connected by optical fiber with MMC valve control device, are used for realization the submodule switching control of MMC；MMC
Valve arrangement is connected by optical fiber and cable with MMC unit control protection devices, is used for realization the control targe of flexible direct current；MMC is mono-
Member control protection device is connected by cable with I O board card, for analog quantity and digital quantity signal interaction.
The I O board card is connected by cable with photoelectric conversion device, the electric signal that photoelectric conversion device exports I O board card
Optical signal is changed into, then is connected by the LCC valve arrangements of optical fiber and customary DC, is used for realization the triggering control of 12 pulse conversion devices
System；LCC valve arrangements are connected by optical fiber and cable with LCC unit control protection devices, are used for realization the control targe of customary DC；
LCC unit control protection devices are connected by cable with I O board card, for analog quantity and digital quantity signal interaction；
The MMC units control protection device passes through optical fiber and cable and mixed DC system coordination with LCC unit control protection devices
Control device connects, and is used for realization sending end customary DC and the mixed DC system coordination of receiving end flexible direct current controls.
Present invention simultaneously provides the implementation method of the mixed DC closed loop test system, include the following steps：
Step 1, the mixed DC system that sending end is customary DC, receiving end is flexible direct current is established in real-time simulation work station
System Real-Time Model；
Step 2, the PB5 of real-time simulation work station and Real Time Digital Simulator is handled board by cable to connect, be used for
Calculate the electrical network of mixed DC system；
Step 3, the PB5 of Real Time Digital Simulator is handled board by optical fiber to be connected with MMC simulators.Real-time digital
The valve group parameters such as valve group submodule number, bridge arm reactance value, submodule capacitance are transmitted to MMC and imitated by emulator PB5 processing boards
The valve group states such as submodule operating status, bridge arm total voltage, submodule capacitor voltage are back to by true device, MMC simulators
Real Time Digital Simulator PB5 handles board；
Step 4, MMC simulators are connected by optical fiber with MMC valve control device, are used for realization the submodule switching control of MMC
System；Submodule capacitor voltage, bridge arm current are given MMC valve control by international AURORA agreements and filled by MMC simulators
Put, MMC valve control device gives submodule trigger pulse to MMC simulators by AURORA agreements；
Step 5, the PB5 processing boards card in Real Time Digital Simulator is connected by optical fiber with I O board card, is used for realization simulation
The input and output of amount and digital quantity signal；MMC valve control device is connected by optical fiber and cable with MMC unit control protection devices, is used for
Realize the control targe of flexible direct current；MMC unit control protection devices are connected by cable with I O board card, for analog quantity and digital quantity
Signal interaction；
Step 6, I O board card is connected by cable with photoelectric conversion device, the telecommunications that photoelectric conversion device exports I O board card
Optical signal number is changed into, then is connected by the LCC valve arrangements of optical fiber and customary DC, is used for realization the triggering of 12 pulse conversion devices
Control；LCC valve arrangements are connected by optical fiber and cable with LCC unit control protection devices, are used for realization the control mesh of customary DC
Mark；LCC unit control protection devices are connected by cable with I O board card, for analog quantity and digital quantity signal interaction；
Step 7, the MMC units control protection device passes through optical fiber and cable and mixed DC system with LCC unit control protection devices
Cooperative control device of uniting connects, and is used for realization the mixed DC system coordination control of sending end customary DC and receiving end flexible direct current
System.
Receiving end provided by the invention is the mixed DC closed loop test system and implementation method of flexible direct current, and that is established closes
Ring test system can be used for receiving end to control the closed loop of protection feature research and its device to survey for the mixed DC system of flexible direct current
Examination, it is easy to operate, it is convenient and practical.
Brief description of the drawings
Using attached drawing, the present invention is further illustrated.
Fig. 1 is a kind of schematic diagram of the receiving end of the present invention for the mixed DC closed loop test system of flexible direct current；
Fig. 2 is the mixed DC system construction drawing that a kind of receiving end is flexible direct current in the present invention；
Fig. 3 is the topology diagram of 12 pulse conversion devices of customary DC；
Fig. 4 is the topology diagram of flexible direct current MMC transverters；
Fig. 5 is the topology diagram of MMC transverter Neutron modules；
In Fig. 1 into Fig. 5, including：
Real Time Digital Simulator (1), real-time simulation work station (2), PB5 boards (3), MMC simulators (4), MMC valve control
Device (5), MMC unit control protection devices (6), I O board card (7), photoelectric conversion device (8), LCC valve arrangements (9), LCC unit controls
Protection device (10), mixed DC system coordination control device (11)；
AC system (12), alternating current filter (13), ac bus (14), exchange main circuit breaker (15),
Customary DC unit (16), three-phase three winding converter power transformer (161), 12 pulse conversion units (162), reactor
(163), big step-length interface circuit (17), small step-length interface circuit (18)；
Flexible direct current unit (19), modularization multi-level converter (191), by-pass switch (192), start resistance (193),
Three-phase double winding tietransformer (194)；
6 pulse conversion devices (20), thyristor (21), grounding switch (22)；
Multi-level inverter bridge arm (23), bridge arm reactor (24), submodule (25)；
IGBT pipes (26), anti-and diode (27), capacitor (28).
Embodiment
The invention will be further described with the following Examples.
Embodiment；
The present invention carries the mixed DC closed loop test system that a kind of receiving end is flexible direct current as shown in Figure 1, including in real time
Digital simulator (1), real-time simulation work station (2), PB5 boards (3), MMC simulators (4), MMC valve control device (5), MMC
Unit control protection device (6), I O board card (7), photoelectric conversion device (8), LCC valve arrangements (9), LCC unit control protection devices (10),
Mixed DC system coordination control device (11).
A kind of sending end is that the implementation method for the mixed DC closed loop test system that customary DC receiving end is flexible direct current includes
Following steps：
1) established in real-time simulation work station sending end as shown in Figure 2 be customary DC, receiving end be the mixed of flexible direct current
Close straight-flow system Real-Time Model；
2) real-time simulation work station (2) is handled board (3) with the PB5 of Real Time Digital Simulator (1) by cable to be connected,
For calculating the electrical network of mixed DC system；
3) PB5 of Real Time Digital Simulator is handled by board (3) by optical fiber and (4) is connected with MMC simulators.Number in real time
The valve group parameters such as valve group submodule number, bridge arm reactance value, submodule capacitance are transmitted to by word emulator PB5 processing boards (3)
MMC simulators (4), MMC simulators (4) are by valve groups such as submodule operating status, bridge arm total voltage, submodule capacitor voltages
State is back to Real Time Digital Simulator PB5 processing boards (3)；
4) MMC simulators (4) are connected by optical fiber with MMC valve control device (5), are used for realization the submodule switching of MMC
Control；MMC simulators (4) give submodule capacitor voltage, bridge arm current to MMC valve by international AURORA agreements
Device (5) is controlled, MMC valve control device (5) gives submodule trigger pulse to MMC simulators (4) by AURORA agreements；
5) the PB5 processing boards (3) in Real Time Digital Simulator are connected by optical fiber with I O board card (7), are used for realization mould
The input and output of analog quantity and digital quantity signal；MMC valve control device (5) is connected by optical fiber and cable with MMC unit control protection devices (6)
Connect, be used for realization the control targe of flexible direct current；MMC unit control protection devices (6) are connected by cable with I O board card (7), are used for
Analog quantity and digital quantity signal interaction；
6) I O board card (7) is connected by cable with photoelectric conversion device (8), and photoelectric conversion device (8) is defeated by I O board card (7)
The electric signal gone out changes into optical signal, then is connected by the LCC valve arrangements (9) of optical fiber and customary DC, is used for realization 12 pulsation
The triggering control of transverter；LCC valve arrangements (9) are connected by optical fiber and cable with LCC unit control protection devices (10), for reality
The control targe of existing customary DC；LCC unit control protection devices (10) are connected by cable with I O board card (7), for analog quantity and
Digital quantity signal interacts；
7) the MMC units control protection device (6) passes through optical fiber and cable and mixed DC with LCC unit control protection devices (10)
System coordination control device (11) connects, and is used for realization sending end customary DC and the association of the mixed DC system of receiving end flexible direct current
Regulation and control system.
Present invention offer is a kind of to be used for the closed test system that sending end is the mixed DC that customary DC receiving end is flexible direct current
System, it is easy to operate, it is convenient and practical.To study the control protection feature for the mixed DC system that receiving end is flexible direct current, there is provided
Effective closed loop test platform.
Finally it should be noted that the above embodiments are merely illustrative of the technical solutions of the present invention rather than the present invention is protected
The limitation of scope, although being explained in detail with reference to preferred embodiment to the present invention, those of ordinary skill in the art should manage
Solution, can to technical scheme technical scheme is modified or replaced equivalently, without departing from technical solution of the present invention essence and
Scope.
Claims (2)
- A kind of 1. mixed DC closed loop test system, it is characterised in that：Foundation is imitated by the real-time digital of simulation mixed DC system True device, real-time simulation work station, the MMC simulators of analog module multilevel converter, MMC valve control device, MMC unit controls Protection device, I O board card, photoelectric conversion device, the LCC valve arrangements of customary DC, LCC unit control protection devices and mixed DC The closed loop test system that system coordination control device is formed；The mixed DC system simulated in real-time simulator includes AC system, alternating current filter, ac bus, friendship Flow breaker, customary DC unit, flexible direct current unit and big step-length interface circuit and small step-length interface circuit；The alternating current filter is parallel to the ac bus of customary DC side, the customary DC unit and flexible direct current unit DC side is interconnected by the big step-length interface circuits of 50us and the small step-length interface circuits of 2.5us respectively, and exchange side passes through alternating current interruption Device is connected on the ac bus；The customary DC includes three-phase three winding converter power transformer, 12 pulse conversion devices LCC based on thyristor and straight Flow reactor；The three-phase three winding converter power transformer is connected by AC circuit breaker with ac bus；12 pulse conversion The DC side of device is connected by direct current reactor with big step-length interface circuit；The exchange side of 12 pulse conversion devices passes through two 6 pulse conversion units are connected with the Y windings and D windings of three-phase three-winding transformer secondary side respectively；6 pulse conversion unit It is made of three thyristor groups parallel connections, each thyristor groups are made of two thyristors connected, and two 6 pulse conversion circuits Tie point be parallel with grounding switch；The flexible direct current include modularization multi-level converter MMC, three-phase double winding tietransformer, by-pass switch and Start resistance；The primary side of the three-phase double winding tietransformer is connected to the AC circuit breaker, and secondary side is connected to institute State startup resistance；The by-pass switch is parallel to startup resistance, and the other end for starting resistance is connected to modular multilevel The exchange side of transverter, the DC side of the modularization multi-level converter pass through small step-length interface circuit and big step-length interface line Road interconnects, and modularization multi-level converter is made of six bridge arms of three-phase, and each bridge arm is by a bridge arm reactor and more height Module forms；The submodule includes the first IGBT pipes, the 2nd IGBT pipes, antiparallel first diode managed with the first IGBT respectively, with 2nd IGBT manages antiparallel second diode and capacitor and forms；The collector of the first IGBT pipes and the 2nd IGBT are managed Emitter connection, described capacitor one end is connected with the emitter of the first IGBT pipes, the capacitor other end and second The collector connection of IGBT pipes；The PB5 processing board cards of the real-time simulation work station and Real Time Digital Simulator are connected by cable, are mixed for calculating The electrical network of straight-flow system；The small step-lengths of 2.5us for being simulated flexible direct current respectively using the PB5 boards of Real Time Digital Simulator are imitated Very, and the big step-length emulation of the 50us of customary DC and other circuits, two pieces of PB5 boards pass through Real Time Digital Simulator Backboard communicates, and is connected with optical fiber；PB5 boards in the Real Time Digital Simulator are connected by optical fiber with I O board card, are used for realization analog quantity and digital quantity The input and output of signal；PB5 boards are connected by optical fiber with modularization multi-level converter MMC simulators, for MMC models Emulation；MMC simulators are connected by optical fiber with MMC valve control device, are used for realization the submodule switching control of MMC；MMC valve control Device is connected by optical fiber and cable with MMC unit control protection devices, is used for realization the control targe of flexible direct current；MMC unit controls Protection device is connected by cable with I O board card, for analog quantity and digital quantity signal interaction；The I O board card is connected by cable with photoelectric conversion device, and photoelectric conversion device changes into the electric signal that I O board card exports Optical signal, then connected by the LCC valve arrangements of optical fiber and customary DC, it is used for realization the triggering control of 12 pulse conversion devices； LCC valve arrangements are connected by optical fiber and cable with LCC unit control protection devices, are used for realization the control targe of customary DC；LCC Unit control protection device is connected by cable with I O board card, for analog quantity and digital quantity signal interaction；The MMC units control protection device is controlled with LCC unit control protection devices by optical fiber and cable with mixed DC system coordination Device connects, and is used for realization sending end customary DC and the mixed DC system coordination of receiving end flexible direct current controls.
- 2. a kind of implementation method of mixed DC closed loop test system, it is characterised in that include the following steps：1) the mixed DC system that sending end is customary DC, receiving end is flexible direct current is established in real-time simulation work station to imitate in real time True mode；2) PB5 of real-time simulation work station and Real Time Digital Simulator is handled board by cable to connect, is mixed for calculating The electrical network of straight-flow system；3) PB5 of Real Time Digital Simulator is handled board by optical fiber to be connected with MMC simulators；Real Time Digital Simulator The valve group parameters such as valve group submodule number, bridge arm reactance value, submodule capacitance are transmitted to MMC simulators by PB5 processing boards, The valve group states such as submodule operating status, bridge arm total voltage, submodule capacitor voltage are back to real-time digital by MMC simulators Emulator PB5 handles board；4) MMC simulators are connected by optical fiber with MMC valve control device, are used for realization the submodule switching control of MMC；MMC is imitated True device gives submodule capacitor voltage, bridge arm current to MMC valve control device, MMC valve by international AURORA agreements Control device gives submodule trigger pulse to MMC simulators by AURORA agreements；5) the PB5 processing boards card in Real Time Digital Simulator is connected by optical fiber with I O board card, is used for realization analog quantity and numeral Measure the input and output of signal；MMC valve control device is connected by optical fiber and cable with MMC unit control protection devices, is used for realization flexibility The control targe of direct current；MMC unit control protection devices are connected by cable with I O board card, are handed over for analog quantity and digital quantity signal Mutually；6) I O board card is connected by cable with photoelectric conversion device, and the electric signal that I O board card exports is changed into light by photoelectric conversion device Signal, then connected by the LCC valve arrangements of optical fiber and customary DC, it is used for realization the triggering control of 12 pulse conversion devices；LCC Valve arrangement is connected by optical fiber and cable with LCC unit control protection devices, is used for realization the control targe of customary DC；LCC is mono- Member control protection device is connected by cable with I O board card, for analog quantity and digital quantity signal interaction；7) the MMC units control protection device passes through optical fiber and cable and mixed DC system coordination control with LCC unit control protection devices Device connection processed, is used for realization sending end customary DC and the mixed DC system coordination of receiving end flexible direct current controls.
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN105527545A (en) * | 2016-02-18 | 2016-04-27 | 云南电网有限责任公司电力科学研究院 | DC power distribution network dynamic simulation experimental device and method |
| CN107306029B (en) * | 2016-04-19 | 2024-01-16 | 南方电网科学研究院有限责任公司 | Analog quantity transmission system and method for hybrid power transmission control protection device |
| CN107884696A (en) * | 2016-09-30 | 2018-04-06 | 全球能源互联网研究院 | A kind of automatic testing equipment and its method of testing of MMC dynamic simulation tests board |
| CN106707796B (en) * | 2017-02-28 | 2023-09-29 | 北京西威清拓变流技术有限公司 | Hybrid simulation physical simulation device for flexible direct current converter |
| CN108663946A (en) * | 2017-03-31 | 2018-10-16 | 南方电网科学研究院有限责任公司 | The test method and system of control protective unit in a kind of multiterminal Hybrid HVDC |
| CN112187396B (en) * | 2019-07-05 | 2022-10-25 | 许继集团有限公司 | Communication system and method suitable for flexible direct current converter valve |
| CN111859700B (en) * | 2020-07-29 | 2024-04-16 | 南方电网科学研究院有限责任公司 | Closed loop simulation system for direct current transmission engineering light measurement |
| CN112311217A (en) * | 2020-09-10 | 2021-02-02 | 中国南方电网有限责任公司超高压输电公司广州局 | Hybrid MMC controlled charging control method with buffer circuit |
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