CN106786721A - A kind of HVDC transmission system - Google Patents
A kind of HVDC transmission system Download PDFInfo
- Publication number
- CN106786721A CN106786721A CN201710003933.XA CN201710003933A CN106786721A CN 106786721 A CN106786721 A CN 106786721A CN 201710003933 A CN201710003933 A CN 201710003933A CN 106786721 A CN106786721 A CN 106786721A
- Authority
- CN
- China
- Prior art keywords
- current conversion
- conversion station
- semiconductor switch
- full
- type semiconductor
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Pending
Links
Classifications
-
- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02J—CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
- H02J3/00—Circuit arrangements for ac mains or ac distribution networks
- H02J3/36—Arrangements for transfer of electric power between ac networks via a high-tension dc link
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E60/00—Enabling technologies; Technologies with a potential or indirect contribution to GHG emissions mitigation
- Y02E60/60—Arrangements for transfer of electric power between AC networks or generators via a high voltage DC link [HVCD]
Landscapes
- Engineering & Computer Science (AREA)
- Power Engineering (AREA)
- Inverter Devices (AREA)
Abstract
Patent of the present invention discloses a kind of HVDC transmission system, the HVDC transmission system is made up of multiple current conversion stations, transformer, high-voltage alternating inlet wire and high voltage dc bus, thermal power generation and the nuclear power of self-stabilization are carried out in high-voltage alternating incoming power part, part comes from understable distributed power source, the thermal power generation and nuclear power of stabilization are powered as the back-up source of distributed power source so that HVDC transmission system is more flexible, more reliable；In addition; energy storage device, by-pass switch and transverter are included in each current conversion station; energy storage device is caused in power failure; HVDC transmission line power supply realizes uninterrupted power supply, and by-pass switch isolates the transverter in the case of maintenance or failure, is easy to implement service without power-off; in addition; feature is easily damaged for semiconductor switch in transverter, converter fault is found in time using the voltage of semiconductor switch, current detection sensor is specially arranged at, be effectively protected transverter.
Description
Technical field
The present invention relates to a kind of HVDC transmission system, and in particular to a kind of HVDC comprising various power supplies
Transmission system.
Background technology
Existing HVDC transmission system, as power supply, fails to take into full account distribution generally using the thermoelectricity and nuclear power of stabilization
The possibility of formula plant-grid connection bulk power grid, however, the features such as distributed energy has energy-saving and environmental protection, it will progressively replace in the future
Thermoelectricity and nuclear power, as power system main power source, therefore, when bulk power system is designed, it is necessary to take into account as electricity
The situation in source, but, the need for bulk power grid has uniqueness to reliability service, when bulk power grid breaks down because power supply is unstable
When, huge harm will be brought in the quite big region powered to it, for this reason, it may be necessary to consider the unstable fortune of distributed power source
Capable characteristic is considered in the design of bulk power grid transmission system, by high voltage power transmisson system because the unstable of distributed power source causes
The probability for breaking down is minimized.
The content of the invention
It is an object of the invention to overcome the deficiencies in the prior art, there is provided a kind of more flexible, more reliable, more economical high pressure
DC transmission system, take full advantage of Grid covering distributed energy, meanwhile, by with other reliable source of power or energy storage
Device cooperation works, it is ensured that the reliability of power supply.
To achieve the above object, the technical scheme of present invention offer is：A kind of HVDC transmission system, high-voltage dc transmission
Electric system includes following element：High-voltage alternating inlet wire 101, current conversion station 104, transformer 102, transformer 103, current conversion station 104, change
Stream station 105, current conversion station 106, transformer 107, high-voltage alternating inlet wire 108, transformer 109, current conversion station 110, high-voltage alternating inlet wire
111st, transformer 112, transformer 113, current conversion station 114, current conversion station 115, current conversion station 116, transformer 117, high-voltage alternating inlet wire
118th, transformer 119, current conversion station 120, high voltage dc bus 121 and high voltage dc bus 122, specifically：High-voltage alternating inlet wire
101 are connected with transformer 102 and transformer 103 respectively, and transformer 102 is connected with current conversion station 104, current conversion station 104 and current conversion station
106 be connected, current conversion station 106 is connected with high voltage dc bus 121, and transformer 103 is connected with current conversion station 105, current conversion station 105 with change
Stream station 110 is connected, and high-voltage alternating inlet wire 108 is connected respectively at transformer 107 with transformer 109, transformer 107 and current conversion station
106 be connected, transformer 109 is connected with current conversion station 110, high-voltage alternating inlet wire 118 respectively with transformer 117 and the phase of transformer 119
Even, transformer 119 is connected with transverter 120, and transverter 120 is connected with transverter 115, transverter 115 and the phase of transformer 113
Even, high-voltage alternating inlet wire 111 is connected with transformer 112 and transformer 113 respectively, and transformer 112 is connected with transverter 114, changes
Stream device 114 is connected with transverter 116, and transverter 116 is connected with high voltage dc bus 122.
The power supply of high-voltage alternating inlet wire 101 and high-voltage alternating inlet wire 102 comes from thermal power plant or nuclear power plant, high-voltage alternating
Inlet wire 108 and high-voltage alternating inlet wire 118 come from distributed power source, when distributed power source powers stable, current conversion station 106, current conversion station
110th, current conversion station 116 and current conversion station 120 are put into operation, and current conversion station 104, current conversion station 105, current conversion station 114 and current conversion station 115 are exited
Operation, by distributed power source for HVDC transmission system is powered, electric energy is through in transformer 109, current conversion station 110, current conversion station 105
By-pass switch, the by-pass switch in current conversion station 104, current conversion station 106 be delivered to high voltage dc bus 121, electric energy is through transformer
119th, the by-pass switch in current conversion station 120, current conversion station 115, the by-pass switch in current conversion station 114, current conversion station 116 are delivered to high pressure
Dc bus 122.
When distributed power source powers stabilization, current conversion station 106, current conversion station 110, current conversion station 116 and energy storage in current conversion station 120
Unit fling-cut switch closure charges for energy-storage units.
When distributed power source is unstable or breaks down, transverter exits fortune in the corresponding current conversion station of distributed power source
OK, energy-storage units fling-cut switch closure in current conversion station, is powered from energy-storage units to high voltage dc bus.
When the corresponding distributed power source of high-voltage alternating inlet wire 108 is unstable or breaks down, current conversion station 106 and current conversion station
Transverter is out of service in 110, and energy-storage units fling-cut switch closure, current conversion station 106 and changes in current conversion station 106 and current conversion station 110
, used as the power supply of high voltage dc bus 121, electric energy is through energy-storage units, current conversion station in current conversion station 110 for energy-storage units in stream station 110
The by-pass switch in by-pass switch, current conversion station 104 in 105, energy-storage units are delivered to high voltage dc bus in current conversion station 106
121, electric energy through the by-pass switch in transformer 119, current conversion station 120, current conversion station 115, the by-pass switch in current conversion station 114, change
Stream station 116 is delivered to high voltage dc bus 122.
When distributed power source is unstable or breaks down and electric power is not enough after energy-storage units electric discharge in current conversion station, current conversion station
104th, current conversion station 105, current conversion station 114 or in current conversion station 115 energy-storage units part put into operation or all put into operation.
When distributed power source is unstable or breaks down and energy-storage units electric power is not enough in current conversion station, high-voltage alternating inlet wire
101 or the corresponding stabilized power source of high-voltage alternating inlet wire 102 put into operation, as HVDC transmission system power supply.
When the corresponding distributed power source of high-voltage alternating inlet wire 108 is unstable or breaks down, and current conversion station 104, current conversion station
105th, when energy-storage units electric power is not enough in current conversion station 106 and current conversion station 110, current conversion station 106 and the by-pass switch of current conversion station 110 are closed
Close, energy-storage units are switched off, and transverter is out of service, and now, electric energy is through in current conversion station 105, current conversion station 104, current conversion station 106
By-pass switch, it is delivered to high voltage dc bus 121；When the corresponding distributed power source of high-voltage alternating inlet wire 118 is unstable or occurs
Failure, and current conversion station 114, current conversion station 115, current conversion station 116 and when energy-storage units electric power is not enough in current conversion station 120, current conversion station 116
With the by-pass switch of current conversion station 120 closure, energy-storage units switch off, and transverter is out of service, now, electric energy through current conversion station 115,
Current conversion station 114, the internal bypass of current conversion station 116 are switched, are delivered to high voltage dc bus 122.
When current conversion station 104, current conversion station 105, current conversion station 106, current conversion station 110, current conversion station 114, current conversion station 115, current conversion station
116 or current conversion station 120 when breaking down or overhauling, the current conversion station is out of service, its corresponding by-pass switch closure, other changes of current
Stand and put into operation as standby current conversion station.
Converter Control system includes following element in current conversion station：Full-control type semiconductor switch 301, full-control type semiconductor are opened
302, full-control type semiconductor switch 303, full-control type semiconductor switch 304, full-control type semiconductor switch 305, full-control type is closed partly to lead
Body switch 306, voltage sensor 307, voltage sensor 308, voltage sensor 309, voltage sensor 310, voltage sensor
311st, voltage sensor 312, current sensor 313, current sensor 314, current sensor 315 and semiconductor switch controller
316.Full-control type semiconductor switch 301 and full-control type semiconductor switch 302 are composed in series U phase bridge arms, full-control type semiconductor switch
303 and full-control type semiconductor switch 304 be composed in series V phase bridge arms, full-control type semiconductor switch 305 and full-control type semiconductor switch
306 are composed in series W phase bridge arms, and the collection U phase bridge arm currents of current sensor 313, current sensor 314 gathers V phase bridge arm currents,
Current sensor 315 gathers W phase currents, and the bridge arm current for collecting is input to semiconductor switch controller 316, when every phase bridge arm
Controller, when there is overcurrent, semiconductor switch controller 316 exports block signal to full-control type semiconductor switch
301st, full-control type semiconductor switch 302, full-control type semiconductor switch 303, full-control type semiconductor switch 304, full-control type semiconductor
Switch 305 and full-control type semiconductor switch 306, realization are protected to transverter, when the current unbalance factor of three-phase bridge arm surpasses
When crossing certain threshold value, output block signal to the full-control type semiconductor switch 301, full-control type of semiconductor switch controller 316 is partly led
Body switch 302, full-control type semiconductor switch 303, full-control type semiconductor switch 304, full-control type semiconductor switch 305 and full-control type
Semiconductor switch 306, when U phases bridge arm current, V phases bridge arm current and W phase bridge arm currents that current sensor is collected are not zero
When, and/or two semiconductor switch up and down of same bridge arm simultaneously turn on or simultaneously turn off, semiconductor switch controller 316 is defeated
Go out block signal to full-control type semiconductor switch 301, full-control type semiconductor switch 302, full-control type semiconductor switch 303, full control
Type semiconductor switch 304, full-control type semiconductor switch 305 and full-control type semiconductor switch 306, voltage transformer 307 are detected entirely
The terminal voltage of control type semiconductor switch 301, the terminal voltage of the detection full-control type of voltage transformer 308 semiconductor switch 302, voltage transformer
The terminal voltage of 309 detection full-control type semiconductor switch 303, the terminal voltage of the detection full-control type of voltage transformer 310 semiconductor switch 304,
The terminal voltage of the detection full-control type of voltage transformer 311 semiconductor switch 305, the detection full-control type semiconductor switch of voltage transformer 312
306 terminal voltages, the magnitude of voltage that voltage transformer will be detected is input into semiconductor switch controller 316, when full-control type semiconductor
Switch 301, full-control type semiconductor switch 302, full-control type semiconductor switch 303, full-control type semiconductor switch 304, full-control type half
When conductor switch 305 or the turn-on cycle of full-control type semiconductor switch 306 are higher or lower than T/3, semiconductor switch controller 316 is defeated
Go out block signal to full-control type semiconductor switch 301, full-control type semiconductor switch 302, full-control type semiconductor switch 303, full control
Type semiconductor switch 304, full-control type semiconductor switch 305 and full-control type semiconductor switch 306, when semiconductor switch controller
316 are detected less than upper bridge arm semiconductor switch conducts number more than 1 or during less than 1, and/or bridge arm semiconductor switch is led instantly
When logical number is more than 1 or less than 1, and/or conducting semiconductor switch number more than 2 or less than 2 when, semiconductor switch controller
316 output block signals to full-control type semiconductor switch 301, full-control type semiconductor switch 302, full-control type semiconductor switch 303,
Full-control type semiconductor switch 304, full-control type semiconductor switch 305 and full-control type semiconductor switch 306.
Implement HVDC transmission system of the invention, have the advantages that so that HVDC transmission system is more
Flexibly, it is more reliable, more economical, the distributed energy that Grid is covered is fully utilized, while can using other
Ensure that the reliability of power supply by power supply or energy storage device, the transverter in each DC line, dual-purpose two is standby, facilitates the change of current
The maintenance of device；Voltage, current protection are used to transverter in current conversion station, by gathering the current value of each bridge arm, each is partly led
Body switchs terminal voltage value, accurately and timely judges whether the semiconductor switch easily broken down in transverter breaks down, when
When detecting failure, locking at once is all switched, and the detection mode is simple, reliable and stable；Opened as bypass using combination switch
Close and fling-cut switch, improve switch high current pitch capability, while when breaking down, reduce disengagement failure electric current when
Between, indirect protection transverter is controlled using unique control system to the transverter in current conversion station, can be avoided because of line
The fluctuation of path loss consumption, causes the error of transverter VD, realizes the perseverance of inverter output voltage truly
It is fixed.
Brief description of the drawings
Fig. 1 HVDC transmission systems configuration figure.
Fig. 2 current conversion station system layouts.
Converter Control system diagram in Fig. 3 current conversion stations.
Fig. 4 current conversion stations internal bypass is switched and energy-storage units fling-cut switch structure chart.
The control system Organization Chart of transverter in Fig. 5 current conversion stations.
Specific embodiment
Fig. 1 HVDC transmission systems mainly include following element：High-voltage alternating inlet wire 101, current conversion station 104, transformer
102nd, transformer 103, current conversion station 104, current conversion station 105, current conversion station 106, transformer 107, high-voltage alternating inlet wire 108, transformer
109th, current conversion station 110, high-voltage alternating inlet wire 111, transformer 112, transformer 113, current conversion station 114, current conversion station 115, current conversion station
116th, transformer 117, high-voltage alternating inlet wire 118, transformer 119, current conversion station 120, high voltage dc bus 121 and HVDC are female
Line 122.
The power supply of high-voltage alternating inlet wire 101 and high-voltage alternating inlet wire 102 is relatively steady from thermal power plant or nuclear power plant etc.
Fixed power supply, high-voltage alternating inlet wire 108 and high-voltage alternating inlet wire 118 are understable from wind power plant or photovoltaic generation factory etc.
Distributed power source.When distributed power source powers stable, current conversion station 106, current conversion station 110, current conversion station 116 and current conversion station 120 put into
Operation, current conversion station 104, current conversion station 105, current conversion station 114 and current conversion station 115 are out of service, are HVDC by distributed power source
, used as power supply, electric energy is through by-pass switch, the current conversion station in transformer 109, current conversion station 110, current conversion station 105 for transmission system
By-pass switch, current conversion station 106 in 104 are delivered to high voltage dc bus 121, and electric energy is through transformer 119, the current conversion station 120, change of current
The stand by-pass switch in 115, the by-pass switch in current conversion station 114, current conversion station 116 is delivered to high voltage dc bus 122, current conversion station
106th, current conversion station 110, current conversion station 116 and in current conversion station 120 energy-storage units fling-cut switch closure be energy-storage units charge.Work as distribution
When formula power supply is unstable or breaks down, transverter is out of service in the corresponding current conversion station of distributed power source, energy storage in current conversion station
Unit fling-cut switch is closed, and is powered from energy-storage units to high voltage dc bus.For example：When corresponding point of high-voltage alternating inlet wire 108
When cloth power supply is unstable or breaks down, transverter is out of service in current conversion station 106 and current conversion station 110, current conversion station 106 and changes
Energy-storage units fling-cut switch closure in stream station 110, energy-storage units are used as high voltage dc bus in current conversion station 106 and current conversion station 110
121 power supplies, electric energy is through the by-pass switch in energy-storage units, current conversion station 105 in current conversion station 110, the bypass in current conversion station 104
Energy-storage units are delivered to high voltage dc bus 121 in switch, current conversion station 106, and electric energy is through transformer 119, the current conversion station 120, change of current
The stand by-pass switch in 115, the by-pass switch in current conversion station 114, current conversion station 116 is delivered to high voltage dc bus 122；Work as high pressure
When the corresponding distributed power source of alternating current inlet wire 118 is unstable or breaks down, transverter is moved back in current conversion station 116 and current conversion station 120
Go out operation, energy-storage units fling-cut switch closure, energy storage in current conversion station 116 and current conversion station 120 in current conversion station 116 and current conversion station 120
Unit is opened as the power supply of high voltage dc bus 122, electric energy through the bypass in energy-storage units, current conversion station 115 in current conversion station 120
Energy-storage units are delivered to high voltage dc bus 122 in by-pass switch, current conversion station 116 in pass, current conversion station 114, and electric energy is through transformation
The by-pass switch in by-pass switch, current conversion station 104 in device 109, current conversion station 110, current conversion station 105, current conversion station 106 convey paramount
Pressure dc bus 121.
When distributed power source is unstable or breaks down and electric power is not enough after energy-storage units electric discharge in current conversion station, current conversion station
104th, current conversion station 105, current conversion station 114 or in current conversion station 115 energy-storage units part put into operation or all put into operation.For example：
When the corresponding distributed power source of high-voltage alternating inlet wire 108 is unstable or breaks down, energy storage in current conversion station 106 and current conversion station 110
Unit as high voltage dc bus 121 power supply, when energy-storage units as electric power release is not enough to maintain HVDC female
During 121 voltage of line, energy-storage units put into operation in current conversion station 105, and now, electric energy is through energy-storage units, current conversion station in current conversion station 110
The by-pass switch in energy-storage units, current conversion station 104 in 105, the energy-storage units in current conversion station 106 are delivered to high voltage dc bus
121；When energy-storage units are not enough to maintain 121 voltage of high voltage dc bus as electric power discharges again, energy storage list in current conversion station 104
Unit puts into operation simultaneously, and now, electric energy is through the energy-storage units in energy-storage units, current conversion station 105 in current conversion station 110, current conversion station 104
Energy-storage units in interior energy-storage units, current conversion station 106 are delivered to high voltage dc bus 121；When the correspondence of high-voltage alternating inlet wire 118
Distributed power source it is unstable or break down, energy-storage units are used as high voltage dc bus in current conversion station 116 and current conversion station 120
122 power supply, when energy-storage units are not enough to maintain 122 voltage of high voltage dc bus with electric power release, current conversion station 115
Interior energy-storage units put into operation, and now, electric energy is through energy-storage units, the change of current in energy-storage units, current conversion station 115 in current conversion station 120
The stand by-pass switch in 114, energy-storage units in current conversion station 116 are delivered to high voltage dc bus 122；When energy-storage units are with electricity
Power release is not enough to maintain 122 voltage of high voltage dc bus again when, energy-storage units put into operation simultaneously in current conversion station 114, now,
Electric energy is through the energy-storage units in energy-storage units, current conversion station 115 in current conversion station 120, energy-storage units, the current conversion station in current conversion station 114
Energy-storage units in 116 are delivered to high voltage dc bus 122.
When distributed power source is unstable or breaks down and energy-storage units electric power is not enough in current conversion station, high-voltage alternating inlet wire
101 or the corresponding stabilized power source of high-voltage alternating inlet wire 102 put into operation, as HVDC transmission system power supply.For example：Work as height
The pressure corresponding distributed power source of alternating current inlet wire 108 is unstable or breaks down, and current conversion station 104, current conversion station 105, current conversion station 106
When not enough with energy-storage units electric power in current conversion station 110, current conversion station 106 and the by-pass switch of current conversion station 110 are closed, energy-storage units switch
Disconnect, transverter is out of service, now, electric energy is switched through current conversion station 105, current conversion station 104, the internal bypass of current conversion station 106, is delivered to
High voltage dc bus 121；When the corresponding distributed power source of high-voltage alternating inlet wire 118 is unstable or breaks down, and current conversion station
114th, current conversion station 115, current conversion station 116 and when energy-storage units electric power is not enough in current conversion station 120, by current conversion station 116 and current conversion station 120
Way switch is closed, and energy-storage units switch off, and transverter is out of service, now, electric energy through current conversion station 115, current conversion station 114, change
116 internal bypass of stream station are switched, are delivered to high voltage dc bus 122.
When current conversion station 104, current conversion station 105, current conversion station 106, current conversion station 110, current conversion station 114, current conversion station 115, current conversion station
116 or current conversion station 120 when breaking down or overhauling, the current conversion station is out of service, its corresponding by-pass switch closure, other changes of current
Stand and put into operation as standby current conversion station.For example：When current conversion station 106 breaks down or overhauls, the internal bypass of current conversion station 106 switch is closed
Close, current conversion station 104 or current conversion station 105 put into operation as standby current conversion station, now, electric energy through current conversion station 110, current conversion station 105,
The by-pass switch of current conversion station 104,106 by-pass switches are delivered to high voltage dc bus 121.
Fig. 2 current conversion stations system mainly includes following element：By-pass switch 201, impedance unit 202, energy-storage units 203, storage
Can unit fling-cut switch 204 and transverter 205.Impedance unit 202, energy-storage units 203 and energy-storage units fling-cut switch 204 are gone here and there
Joint group is into series arm, and the series arm is in parallel with by-pass switch 201 and transverter 205 respectively.
Converter Control system includes following element in Fig. 3 current conversion stations：Full-control type semiconductor switch 301, full-control type is partly led
Body switch 302, full-control type semiconductor switch 303, full-control type semiconductor switch 304, full-control type semiconductor switch 305, full-control type
Semiconductor switch 306, voltage sensor 307, voltage sensor 308, voltage sensor 309, voltage sensor 310, voltage are passed
Sensor 311, voltage sensor 312, current sensor 313, current sensor 314, current sensor 315 and semiconductor switch control
Device processed 316.Full-control type semiconductor switch 301 and full-control type semiconductor switch 302 are composed in series U phase bridge arms, full-control type semiconductor
Switch 303 and full-control type semiconductor switch 304 are composed in series V phase bridge arms, full-control type semiconductor switch 305 and full-control type semiconductor
Switch 306 is composed in series W phase bridge arms.
Current sensor 313 gathers U phase bridge arm currents, the collection V phase bridge arm currents of current sensor 314, current sensor
315 collection W phase currents, the bridge arm current for collecting is input to semiconductor switch controller 316, when the electric current of every phase bridge arm exceedes
Threshold value, when there is overcurrent, semiconductor switch controller 316 exports block signal to full-control type semiconductor switch 301, full-control type
Semiconductor switch 302, full-control type semiconductor switch 303, full-control type semiconductor switch 304, full-control type semiconductor switch 305 and complete
Control type semiconductor switch 306, realization is protected to transverter, when the current unbalance factor of three-phase bridge arm exceedes certain threshold value
When, semiconductor switch controller 316 export block signal to full-control type semiconductor switch 301, full-control type semiconductor switch 302,
Full-control type semiconductor switch 303, full-control type semiconductor switch 304, full-control type semiconductor switch 305 and full-control type semiconductor switch
306, realization is protected to transverter.When U phases bridge arm current, V phases bridge arm current and W phase bridge arms that current sensor is collected
When electric current is not zero, now, two semiconductor switch up and down of same bridge arm are simultaneously turned on or simultaneously turned off, and transverter is normal
During work, in the absence of the state that two semiconductor switch are simultaneously turned on or turned off up and down of same bridge arm, now part half is illustrated
Conductor switch is broken down, and is protection transverter, and output block signal to the full-control type semiconductor of semiconductor switch controller 316 is opened
301, full-control type semiconductor switch 302, full-control type semiconductor switch 303, full-control type semiconductor switch 304, full-control type is closed partly to lead
Body switchs 305 and full-control type semiconductor switch 306.
The terminal voltage of the detection full-control type of voltage transformer 307 semiconductor switch 301, the detection of voltage transformer 308 full-control type half
Conductor switchs 302 terminal voltages, and the terminal voltage of the detection full-control type of voltage transformer 309 semiconductor switch 303, voltage transformer 310 is examined
The terminal voltage of full-control type semiconductor switch 304 is surveyed, the terminal voltage of the detection full-control type of voltage transformer 311 semiconductor switch 305, voltage is mutual
The terminal voltage of the detection full-control type of sensor 312 semiconductor switch 306, the magnitude of voltage that voltage transformer will be detected is input into semiconductor to be opened
Gateway controller 316.When transverter normal work, each full-control type semiconductor switch conducts angle is 120 degree, works as input AC
When the electric cycle is T, in a cycle T, each full-control type semiconductor switch conducts T/3, its pipe pressure during semiconductor switch conducts
Certain threshold value is reduced to, semiconductor switch controller 316 judges that it leads in a cycle according to each semiconductor switch terminals voltage
The logical time, when full-control type semiconductor switch 301, full-control type semiconductor switch 302, full-control type semiconductor switch 303, full-control type
Semiconductor switch 304, full-control type semiconductor switch 305 or the turn-on cycle of full-control type semiconductor switch 306 are higher or lower than T/3
When, illustrate that now part semiconductor switch breaks down, it is protection transverter, the output locking letter of semiconductor switch controller 316
Number to full-control type semiconductor switch 301, full-control type semiconductor switch 302, full-control type semiconductor switch 303, full-control type semiconductor
Switch 304, full-control type semiconductor switch 305 and full-control type semiconductor switch 306.When transverter normal work, with six
Normal operating conditions, i.e. full-control type semiconductor switch 301,304 are simultaneously turned on, and full-control type semiconductor switch 301,306 is led simultaneously
Logical, full-control type semiconductor switch 303,306 is simultaneously turned on, and full-control type semiconductor switch 303-302 is simultaneously turned on, and full-control type is partly led
Body switch 305-302 is simultaneously turned on, and full-control type semiconductor switch 305-304 is simultaneously turned on, under normal operating conditions, only one
Upper bridge arm semiconductor switch and a lower bridge arm semiconductor switch are simultaneously turned on, when semiconductor switch controller 316 is detected less
When upper bridge arm semiconductor switch conducts number is more than 1 or less than 1, declaratives semiconductor switch breaks down, instantly bridge arm
When semiconductor switch conducts number is more than 1 or less than 1, illustrate that semiconductor switch breaks down, when transverter each moment, conducting
Semiconductor switch number more than 2 or during less than 2, illustrate that semiconductor switch breaks down, be to protect transverter, semiconductor switch
Output block signal to full-control type semiconductor switch 301, full-control type semiconductor switch 302, the full-control type semiconductor of controller 316 is opened
Close 303, full-control type semiconductor switch 304, full-control type semiconductor switch 305 and full-control type semiconductor switch 306.
Fig. 4 current conversion stations internal bypass is switched and energy-storage units fling-cut switch includes following element：Auxiliary direct current cutout 401,
Quick disconnecting link 402, main dc circuit breaker 403, main dc circuit breaker 404, main dc circuit breaker 405 and main dc circuit breaker 406.
Main dc circuit breaker is formed in parallel after being connected by 4 full-control type semiconductor switch with energy dissipation device.When fling-cut switch needs to disconnect
When, auxiliary direct current cutout 401 is turned off first, and quick disconnecting link 402 is turned off afterwards, and finally main dc circuit breaker 403 ~ 406 is simultaneously
Shut-off, residual current is consumed by energy dissipation device.
Fig. 5 is the control system Organization Chart of transverter in current conversion station, and the control framework includes following element：Voltage sensor
501st, subtracter 502, voltage ratio integral controller 503, voltage magnitude limiter 504, current sensor 505, adder
506th, phased angle adjuster 507, voltage sensor 508, phased angle control circuit 509, surge gap 510.Voltage detector
501 detection transverter DC output side positive pole and cathode voltages, and the voltage signal is input into defeated to negative (-) of subtracter 502
Enter end, DC reference voltage output valve is input into just (+) input of subtracter 502, the output voltage difference signal of subtracter 502
Input to voltage ratio integral controller 503, voltage ratio integral controller 503 output signal to voltage magnitude limiter 504,
Voltage magnitude limiter 504 outputs signal to adder 506, and phased angle reference value is input into defeated to adder 506, adder 506
Go out signal to phased angle adjuster 507, current sensor 505 to export transverter direct-flow output signal to the phased angle that detects and adjust
Section device 507, the voltage sense signal of voltage sensor 508 to phased angle adjuster 507, phased angle adjuster 507 output letter
Number pulse amplifier 510 is output control signals to phased angle control circuit 509, phased angle control circuit 509, by pulsed discharge
Semiconductor switch break-make pulsewidth on the control transverter of device 510, realizes the control at converter deblocking angle.The calculation of phased angle adjuster
Method formula is,, wherein, α is the phased angle of transverter,It is phased angle reference value,For circuit is passed
Defeated impedance, i is the DC current values of transverter output,It is the voltage loss value on the DC line of transverter output.Using upper
The transverter stated in control framework exchange stream station carries out voltage control, can avoid the fluctuation because of line loss, causes transverter
The error of VD, realizes the constant of inverter output voltage truly.
Claims (10)
1. a kind of HVDC transmission system, HVDC transmission system includes following element：High-voltage alternating inlet wire (101), change
Stream station (104), transformer (102), transformer (103), current conversion station (104), current conversion station (105), current conversion station (106), transformer
(107), high-voltage alternating inlet wire (108), transformer (109), current conversion station (110), high-voltage alternating inlet wire (111), transformer
(112), transformer (113), current conversion station (114), current conversion station (115), current conversion station (116), transformer (117), high-voltage alternating enter
Line (118), transformer (119), current conversion station (120), high voltage dc bus (121) and high voltage dc bus (122), its feature exist
In：High-voltage alternating inlet wire (101) is connected with transformer (102) and transformer (103) respectively, transformer (102) and current conversion station
(104) it is connected, current conversion station (104) is connected with current conversion station (106), and current conversion station (106) is connected with high voltage dc bus (121), becomes
Depressor (103) is connected with current conversion station (105), and current conversion station (105) is connected with current conversion station (110), and high-voltage alternating inlet wire (108) is respectively
It is connected with transformer (109) in transformer (107), transformer (107) is connected with current conversion station (106), transformer (109) and the change of current
Stand (110) be connected, high-voltage alternating inlet wire (118) is connected with transformer (117) and transformer (119) respectively, transformer (119) and
Transverter (120) is connected, and transverter (120) is connected with transverter (115), and transverter (115) is connected with transformer (113), high
Pressure alternating current inlet wire (111) is connected with transformer (112) and transformer (113) respectively, transformer (112) and transverter (114) phase
Even, transverter (114) is connected with transverter (116), and transverter (116) is connected with high voltage dc bus (122).
2. HVDC transmission system according to claim 1, it is characterised in that：High-voltage alternating inlet wire (101) and high pressure
The power supply of alternating current inlet wire (102) comes from thermal power plant or nuclear power plant, high-voltage alternating inlet wire (108) and high-voltage alternating inlet wire
(118) from distributed power source, when distributed power source powers stable, current conversion station (106), current conversion station (110), current conversion station (116)
Put into operation with current conversion station (120), current conversion station (104), current conversion station (105), current conversion station (114) and current conversion station (115) exit fortune
OK, by distributed power source for HVDC transmission system is powered, electric energy is through transformer (109), current conversion station (110), current conversion station
(105) by-pass switch in by-pass switch, current conversion station (104) in, current conversion station (106) are delivered to high voltage dc bus (121),
Electric energy is opened through the by-pass switch in transformer (119), current conversion station (120), current conversion station (115), the bypass in current conversion station (114)
Close, current conversion station (116) is delivered to high voltage dc bus (122).
3. HVDC transmission system according to claim 2, it is characterised in that：When distributed power source powers stabilization,
Current conversion station (106), current conversion station (110), current conversion station (116) and the interior energy-storage units fling-cut switch closure of current conversion station (120) are energy storage
Unit charges.
4. HVDC transmission system according to claim 1, it is characterised in that：When distributed power source is unstable or occurs
During failure, transverter is out of service in the corresponding current conversion station of distributed power source, energy-storage units fling-cut switch closure in current conversion station, by
Energy-storage units are powered to high voltage dc bus.
5. HVDC transmission system according to claim 4, it is characterised in that：When high-voltage alternating inlet wire (108) correspondence
Distributed power source it is unstable or when breaking down, current conversion station (106) and current conversion station (110) interior transverter are out of service, the change of current
Stand (106) and the interior energy-storage units fling-cut switch closure of current conversion station (110), current conversion station (106) and current conversion station (110) interior energy-storage units
Used as high voltage dc bus (121) power supply, electric energy is through the bypass in current conversion station (110) interior energy-storage units, current conversion station (105)
By-pass switch, current conversion station (106) interior energy-storage units in switch, current conversion station (104) are delivered to high voltage dc bus (121), electricity
Can through the by-pass switch in transformer (119), current conversion station (120), current conversion station (115), the by-pass switch in current conversion station (114),
Current conversion station (116) is delivered to high voltage dc bus (122).
6. HVDC transmission system according to claim 4, it is characterised in that：When distributed power source is unstable or occurs
When electric power is not enough after energy-storage units electric discharge in failure and current conversion station, current conversion station (104), current conversion station (105), current conversion station (114) or
Put into operation or all put into operation in the interior energy-storage units part of current conversion station (115).
7. HVDC transmission system according to claim 4, it is characterised in that：When distributed power source is unstable or occurs
When energy-storage units electric power is not enough in failure and current conversion station, high-voltage alternating inlet wire (101) or high-voltage alternating inlet wire (102) are corresponding steady
Determine power supply to put into operation, as HVDC transmission system power supply.
8. HVDC transmission system according to claim 7, it is characterised in that：When high-voltage alternating inlet wire (108) correspondence
Distributed power source it is unstable or break down, and current conversion station (104), current conversion station (105), current conversion station (106) and current conversion station
(110) when interior energy-storage units electric power is not enough, current conversion station (106) and current conversion station (110) by-pass switch are closed, and energy-storage units switch is disconnected
Open, transverter is out of service, now, electric energy through current conversion station (105), current conversion station (104), current conversion station (106) internal bypass switch, it is defeated
Deliver to high voltage dc bus (121)；When the corresponding distributed power source of high-voltage alternating inlet wire (118) is unstable or breaks down, and
When current conversion station (114), current conversion station (115), current conversion station (116) and the not enough interior energy-storage units electric power of current conversion station (120), current conversion station
(116) closed with current conversion station (120) by-pass switch, energy-storage units are switched off, and transverter is out of service, and now, electric energy is through changing
Stream station (115), current conversion station (114), current conversion station (116) internal bypass are switched, are delivered to high voltage dc bus (122).
9. HVDC transmission system according to claim 1, it is characterised in that：When current conversion station (104), current conversion station
(105), current conversion station (106), current conversion station (110), current conversion station (114), current conversion station (115), current conversion station (116) or current conversion station
(120) when breaking down or overhaul, the current conversion station is out of service, its corresponding by-pass switch closure, and other current conversion stations are used as rear
Standby current conversion station puts into operation.
10. HVDC transmission system according to claim 1, it is characterised in that：Converter Control system in current conversion station
Including following element：Full-control type semiconductor switch (301), full-control type semiconductor switch (302), full-control type semiconductor switch
(303), full-control type semiconductor switch (304), full-control type semiconductor switch (305), full-control type semiconductor switch (306), voltage
Sensor (307), voltage sensor (308), voltage sensor (309), voltage sensor (310), voltage sensor (311),
Voltage sensor (312), current sensor (313), current sensor (314), current sensor (315) and semiconductor switch control
Device (316) processed, full-control type semiconductor switch (301) and full-control type semiconductor switch (302) are composed in series U phase bridge arms, full-control type
Semiconductor switch (303) and full-control type semiconductor switch (304) are composed in series V phase bridge arms, full-control type semiconductor switch (305) and
Full-control type semiconductor switch (306) is composed in series W phase bridge arms, current sensor (313) collection U phase bridge arm currents, current sense
Device (314) gathers V phase bridge arm currents, and current sensor (315) gathers W phase currents, and the bridge arm current for collecting is input to partly to be led
Body switch controller (316), when the controller of every phase bridge arm, when there is overcurrent, semiconductor switch controller (316)
Export block signal to full-control type semiconductor switch (301), full-control type semiconductor switch (302), full-control type semiconductor switch
(303), full-control type semiconductor switch (304), full-control type semiconductor switch (305) and full-control type semiconductor switch (306), realize
Transverter is protected, when the current unbalance factor of three-phase bridge arm exceedes certain threshold value, semiconductor switch controller (316)
Export block signal to full-control type semiconductor switch (301), full-control type semiconductor switch (302), full-control type semiconductor switch
(303), full-control type semiconductor switch (304), full-control type semiconductor switch (305) and full-control type semiconductor switch (306), work as electricity
When U phases bridge arm current, V phases bridge arm current and the W phase bridge arm currents that flow sensor is collected are not zero, and/or same bridge arm
Upper and lower two semiconductor switch are simultaneously turned on or simultaneously turned off, and semiconductor switch controller (316) exports block signal to full control
Type semiconductor switch (301), full-control type semiconductor switch (302), full-control type semiconductor switch (303), full-control type semiconductor are opened
Close (304), full-control type semiconductor switch (305) and full-control type semiconductor switch (306), the full control of voltage transformer (307) detection
Type semiconductor switch (301) terminal voltage, voltage transformer (308) detection full-control type semiconductor switch (302) terminal voltage, voltage is mutual
Sensor (309) detects full-control type semiconductor switch (303) terminal voltage, voltage transformer (310) detection full-control type semiconductor switch
(304) terminal voltage, voltage transformer (311) detection full-control type semiconductor switch (305) terminal voltage, voltage transformer (312) inspection
Full-control type semiconductor switch (306) terminal voltage is surveyed, the magnitude of voltage that voltage transformer will be detected is input into semiconductor switch control
Device (316), when full-control type semiconductor switch (301), full-control type semiconductor switch (302), full-control type semiconductor switch (303),
Full-control type semiconductor switch (304), full-control type semiconductor switch (305) or full-control type semiconductor switch (306) turn-on cycle are high
When T/3, T is the cycle of alternating current input power supplying, and semiconductor switch controller (316) exports block signal to full-control type
Semiconductor switch (301), full-control type semiconductor switch (302), full-control type semiconductor switch (303), full-control type semiconductor switch
(304), full-control type semiconductor switch (305) and full-control type semiconductor switch (306), when semiconductor switch controller (316) inspection
Measure less than upper bridge arm semiconductor switch conducts number more than 1 or during less than 1, and/or bridge arm semiconductor switch conducts instantly
Number more than 1 or during less than 1, and/or conducting semiconductor switch number more than 2 or less than 2 when, semiconductor switch controller
(316) output block signal to full-control type semiconductor switch (301), full-control type semiconductor switch (302), full-control type semiconductor is opened
Close (303), full-control type semiconductor switch (304), full-control type semiconductor switch (305) and full-control type semiconductor switch (306).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710003933.XA CN106786721A (en) | 2017-01-04 | 2017-01-04 | A kind of HVDC transmission system |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710003933.XA CN106786721A (en) | 2017-01-04 | 2017-01-04 | A kind of HVDC transmission system |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN106786721A true CN106786721A (en) | 2017-05-31 |
Family
ID=58949935
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201710003933.XA Pending CN106786721A (en) | 2017-01-04 | 2017-01-04 | A kind of HVDC transmission system |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN106786721A (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110492451A (en) * | 2019-09-09 | 2019-11-22 | 山东泰开高压开关有限公司 | A kind of multiport DC line intersection's fault processing system and method |
| CN110912112A (en) * | 2019-12-24 | 2020-03-24 | 珠海格力电器股份有限公司 | Common bus circuit and fault detection method thereof |
| CN112285500A (en) * | 2020-10-20 | 2021-01-29 | 深圳英飞源技术有限公司 | Insulation detection circuit and control method thereof |
Citations (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101752873A (en) * | 2010-01-25 | 2010-06-23 | 株洲变流技术国家工程研究中心有限公司 | Protection method of DC electricity transmission high-voltage convertor station |
| CN102412590A (en) * | 2011-11-23 | 2012-04-11 | 华中科技大学 | Modular direct-current grid connection topology comprising energy storing device for wind power station group |
| CN103701145A (en) * | 2014-01-02 | 2014-04-02 | 浙江大学 | Mixed MMC-based mixed direct current power transmission system |
| CN104022577A (en) * | 2014-06-21 | 2014-09-03 | 中国能源建设集团广东省电力设计研究院 | Flexible DC transmission system converter station control protection method and structure |
| CN104659807A (en) * | 2014-11-21 | 2015-05-27 | 清华大学 | Method for on-line seamless grid connection of MMC type flexible direct current converter |
| CN105226628A (en) * | 2015-09-23 | 2016-01-06 | 国网浙江省电力公司电力科学研究院 | A kind of direct-flow distribution system |
| CN105406501A (en) * | 2015-12-21 | 2016-03-16 | Abb技术有限公司 | Rectifier station, high-voltage direct-current power transmission system and fault eliminating method |
| CN105990828A (en) * | 2015-02-05 | 2016-10-05 | 国家电网公司 | Direct-current power grid test model used for new energy grid connection |
-
2017
- 2017-01-04 CN CN201710003933.XA patent/CN106786721A/en active Pending
Patent Citations (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101752873A (en) * | 2010-01-25 | 2010-06-23 | 株洲变流技术国家工程研究中心有限公司 | Protection method of DC electricity transmission high-voltage convertor station |
| CN102412590A (en) * | 2011-11-23 | 2012-04-11 | 华中科技大学 | Modular direct-current grid connection topology comprising energy storing device for wind power station group |
| CN103701145A (en) * | 2014-01-02 | 2014-04-02 | 浙江大学 | Mixed MMC-based mixed direct current power transmission system |
| CN104022577A (en) * | 2014-06-21 | 2014-09-03 | 中国能源建设集团广东省电力设计研究院 | Flexible DC transmission system converter station control protection method and structure |
| CN104659807A (en) * | 2014-11-21 | 2015-05-27 | 清华大学 | Method for on-line seamless grid connection of MMC type flexible direct current converter |
| CN105990828A (en) * | 2015-02-05 | 2016-10-05 | 国家电网公司 | Direct-current power grid test model used for new energy grid connection |
| CN105226628A (en) * | 2015-09-23 | 2016-01-06 | 国网浙江省电力公司电力科学研究院 | A kind of direct-flow distribution system |
| CN105406501A (en) * | 2015-12-21 | 2016-03-16 | Abb技术有限公司 | Rectifier station, high-voltage direct-current power transmission system and fault eliminating method |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110492451A (en) * | 2019-09-09 | 2019-11-22 | 山东泰开高压开关有限公司 | A kind of multiport DC line intersection's fault processing system and method |
| CN110912112A (en) * | 2019-12-24 | 2020-03-24 | 珠海格力电器股份有限公司 | Common bus circuit and fault detection method thereof |
| CN112285500A (en) * | 2020-10-20 | 2021-01-29 | 深圳英飞源技术有限公司 | Insulation detection circuit and control method thereof |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| AU2008200885B2 (en) | Backup power system | |
| CN103081268B (en) | Earthing device | |
| WO2022121431A1 (en) | Medium-voltage photovoltaic grid-connected inverter system and photovoltaic power generation system | |
| CN206164112U (en) | A attenuating device is inductiond to anti current potential for photovoltaic power generation system | |
| US9419428B2 (en) | Protection device for DC collection systems | |
| CN203504285U (en) | UPS integrated power supply | |
| CN106026137B (en) | A kind of alternating current circuit fault traversing control method of THE UPFC | |
| CN109361213B (en) | Withdrawal device and method for series converter of hybrid direct-current power transmission system | |
| CN106786721A (en) | A kind of HVDC transmission system | |
| CN203660548U (en) | Transformer substation direct-current power supply system provided with emergency stand-by power supply | |
| CN109888805A (en) | Protection system and method temporarily drops in frequency converter voltage | |
| CN109119975A (en) | A kind of failure protection method of the breaker of direct current system and its start-up course | |
| CN106602689B (en) | System for preventing direct-current power supply bus from losing voltage and operation method thereof | |
| CN110649565B (en) | Protection method of regenerative braking energy feedback system of high-speed rail | |
| CN104052112A (en) | Battery pack monitoring method and system | |
| CN116581720A (en) | Thyristor type direct current breaker and control method thereof | |
| KR20130083292A (en) | Overvoltage protection system of hvdc system connected to ac network | |
| CN103545787A (en) | Protecting system of unified power quality controller and protection control method of protecting system | |
| CN203674688U (en) | Unified electric energy quality controller protection system | |
| CN203933147U (en) | A kind of box-type substation that switches main power supply | |
| CN207677627U (en) | A kind of low-voltage ride-through power source for frequency converter control system | |
| CN204290471U (en) | Batteries off-line electric discharge free of discontinuities switching device shifter | |
| CN203674728U (en) | AC-DC hybrid micro-grid fault ride-through control device | |
| CN201846251U (en) | Solar power generation device | |
| Zhu et al. | Research and Implementation of Control Strategies for Multiple Transmission Modes in Yongren-Funing HVDC |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| WD01 | Invention patent application deemed withdrawn after publication |
Application publication date: 20170531 |
|
| WD01 | Invention patent application deemed withdrawn after publication |