CN208094430U - A kind of converter unit protection circuit - Google Patents
A kind of converter unit protection circuit Download PDFInfo
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- CN208094430U CN208094430U CN201820299324.3U CN201820299324U CN208094430U CN 208094430 U CN208094430 U CN 208094430U CN 201820299324 U CN201820299324 U CN 201820299324U CN 208094430 U CN208094430 U CN 208094430U
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
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- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
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Abstract
The utility model discloses a kind of converter unit protection circuit; voltage source converter in the transverter with DC Line Fault ride-through capability being composed in series with voltage-source type valve terminal for protection diode valve group or current source type valve terminal; thyristor controlled series compensation is bypassed in the transverter both ends parallel connection with DC Line Fault ride-through capability, the anode and cathode for bypassing thyristor controlled series compensation is connected with the anode and cathode of the transverter with DC Line Fault ride-through capability respectively.Above-mentioned voltage source converter protection circuit efficiently solves voltage source converter overvoltage caused by DC side and crosses flow problem, ensures voltage source converter reliability service.
Description
Technical field
The utility model belongs to flexible DC power transmission, high-voltage dc transmission electrical domain, and in particular to a kind of converter unit protection electricity
Road.
Background technology
Current source type D.C. high voltage transmission advantage based on thyristor is that transverter loss is small, when DC line fault occurs
Straight-flow system can be restarted by phase shift；The disadvantage is that inverter side transverter is operated in active inversion, passive system cannot be accessed；It is inverse
Become after disturbance occurs in side access weak AC system and is easy to happen commutation failure；Reactive power consumption is big, and voltage, current harmonic content are high,
It needs that filter offer reactive power and filtering are installed.Direct current transportation advantage based on voltage source converter is that controllability is high,
Passive system is can access, reactive power compensator is not needed；Disadvantage is that transverter switching loss is big, using the modularization of half-bridge structure
Multilevel converter cannot control fault current when DC side failure, can only be by disconnecting exchange side open circuit after failure generation
Device cuts off failure.
For DC side failure, ABB AB solves DC side failure using the breaker for increasing DC line；Siemens
Company is solved using full-bridge circuit structure；Alstom uses full-bridge circuit and bridge arm series power electronic switching device
The mode of part solves；Zhejiang University solves using in major loop series diode.Said program is sent out in DC transmission system
Raw extreme failure, as voltage source converter and transformer indirectly, AC system three-phase shortcircuit, still voltage source can be caused to change
It flows device and severe overvoltage and overcurrent occurs.In order to ensure above-mentioned transverter reliability service, proposed on this kind of architecture basics a kind of new
Protection circuit and guard method and device.
Utility model content
The purpose of this utility model is to provide a kind of converter unit protection circuit, prevent with voltage source converter appearance
Severe overvoltage or overcurrent, and controlling rectification side transverter makes DC current to zero, realizes that failure is restarted, protects voltage-source type valve group
Unit reliability service.
In order to achieve the above objectives, the technical solution adopted in the utility model is：A kind of converter unit protection circuit, for protecting
The voltage source converter in voltage-source type valve terminal is protected, using one of following three kinds of schemes：
Scheme one：Including at least a bypass thyristor controlled series compensation and a diode valve group, connection type is two pole
Pipe valve group is connected with the voltage-source type valve terminal without DC Line Fault ride-through capability, and composition has DC Line Fault ride-through capability
Transverter, bypass thyristor controlled series compensation in the transverter both ends parallel connection with DC Line Fault ride-through capability, bypass thyristor controlled series compensation
Anode be connected with the anode of the transverter, the cathode for bypassing thyristor controlled series compensation is connected with the cathode of the transverter；
Scheme two：Including at least a bypass thyristor controlled series compensation and a current source type valve terminal；Connection type is electricity
Stream source type valve terminal is connected with the voltage-source type valve terminal without DC Line Fault ride-through capability, and composition has DC Line Fault
The transverter of ride-through capability；Thyristor controlled series compensation is bypassed in the transverter both ends parallel connection with DC Line Fault ride-through capability, bypass is brilliant
The anode of brake tube valve group is connected with the anode of the transverter, bypasses the cathode of thyristor controlled series compensation and the cathode phase of the transverter
Even；
Scheme three：Including at least a bypass thyristor controlled series compensation, bypasses the anode of thyristor controlled series compensation and there is DC Line Fault
The anode of the voltage-source type valve terminal of ride-through capability is connected, and the cathode for bypassing thyristor controlled series compensation passes through energy with DC Line Fault
The cathode of the voltage-source type valve terminal of power is connected.
In said program：Diode valve group is connected company with the voltage-source type valve terminal without DC Line Fault ride-through capability
Topological structure there are two types of connecing：
(1) cathode of diode valve group is connected with the anode of voltage-source type valve terminal；Or
(2) anode of diode valve group is connected with the cathode of voltage-source type valve terminal；
Structure planted for (1), the just extremely diode valve group of the transverter with DC Line Fault ride-through capability
Anode, the cathode of the transverter with DC Line Fault ride-through capability are the cathode of voltage-source type valve terminal；For (2)
Kind of structure, the just extremely anode of voltage-source type valve terminal of the transverter with DC Line Fault ride-through capability, the tool
It is the cathode of diode valve group to have the cathode of the transverter of DC Line Fault ride-through capability.
The above-mentioned voltage-source type valve terminal without DC Line Fault ride-through capability is that itself can not achieve DC power transmission system
The DC side fault traversing of system, it is described itself do not have DC Line Fault ride-through capability voltage source converter be it is following any or
It is a variety of：The modular multilevel that two level converters, diode-clamped multilevel converter, half-bridge structure submodule form changes
Flow device MMC, two level converter CTL of two level cascade current converter CSL or stack；The diode valve group is by multiple two poles
Pipe is composed in series.
The above-mentioned voltage-source type valve terminal with DC Line Fault ride-through capability, which is itself, can realize DC transmission system
DC side fault traversing is the increase auxiliary power electronics on the basis of voltage source converter without DC Line Fault ride-through capability
Device inhibit reverse current realize, it is described itself have DC Line Fault ride-through capability voltage source converter be it is following any or
It is a variety of：Modularization multi-level converter MMC, two level cascade current converter CSL, the stack two of full bridge structure submodule composition
Level converter CTL, the mixing module multilevel converter HMC or diode clamp of half-bridge and full bridge structure submodule composition
Bit-type modularization multi-level converter.
In said program：Current source type valve terminal and the voltage-source type valve terminal for not having DC Line Fault ride-through capability
Topological structure there are two types of being connected in series with：
(1) cathode of current source type valve terminal is connected with the anode of voltage-source type valve terminal；Or
(2) anode of current source type valve terminal is connected with the cathode of voltage-source type valve terminal；
Structure, the just extremely current source type valve group of the transverter with DC Line Fault ride-through capability are planted for (1)
The anode of unit；The cathode of the transverter with DC Line Fault ride-through capability is the cathode of voltage-source type valve terminal；It is right
Structure, the just extremely anode of voltage-source type valve terminal of the transverter with DC Line Fault ride-through capability are planted in (2)；
The cathode of the transverter with DC Line Fault ride-through capability is the cathode of current source type valve terminal.
Above-mentioned current source type valve terminal includes line commutation transverter；Or it is opened with bypass including line commutation transverter
It closes, the two is connected in parallel；Or including line commutation transverter and bypass cock and disconnecting link component, line commutation transverter with it is other
It opens up pass to be connected in parallel, the unit both ends after parallel connection are connected with one end of connection disconnecting link respectively, and the other end for connecting disconnecting link is in parallel
Bypass disconnecting link.
Above-mentioned line commutation transverter is six pulsation bridge circuits or 12 pulsation bridge circuits, by can not turn off half
Control type power semiconductor forms.
Above-mentioned voltage-source type valve terminal includes voltage source converter；Or voltage source converter and its bypass resistance；Or
Person includes voltage source converter and its bypass resistance and disconnecting link component, and voltage source converter and its bypass resistance both ends are distinguished
It is connected with one end of connection disconnecting link, connects the other end parallel connection bypass disconnecting link of disconnecting link.
Above-mentioned voltage source converter and its bypass resistance are voltage source converter and bypass cock parallel circuit；Or bypass
Switch with inductance connection after again with voltage source converter parallel circuit；Or after voltage source converter and inductance connection again with bypass
Switch in parallel circuit.Above-mentioned bypass cock is following any one or more：Mechanical switch, electronic power switch or disconnecting link.
Above-mentioned voltage source converter is made of the full-control type power semiconductor that can be turned off；The full-control type power turned off
Semiconductor is following any one or more：Insulated gate bipolar transistor IGBT, can turn off integrated gate commutated thyristor IGCT
Thyristor GTO, Power MOSFET Power MOSFET, electron injection enhancement grid crystal IEGT, door pole stream-exchanging thyristor GCT or
SiC reinforcement type junction field effect transistor SiC-JFET.
Above-mentioned bypass thyristor controlled series compensation only includes a bridge arm, is made of multiple Thyristors in series, and include corresponding control
System protection circuit；Or the bypass thyristor controlled series compensation is the bypass pair of line commutation transverter in parallel or by the parallel connection
The quick phase shift of line commutation transverter realize.
In order to ensure thyristor reliable turn-off, the beginning or end series direct current conversion after above-mentioned multiple Thyristors in series
Switch or isolation switch.
The characteristics of the utility model：It is proposed a kind of converter unit protection circuit, bypassing thyristor by input discharges direct current energy
Amount prevents that there is the voltage source converter in the transverter of DC Line Fault ride-through capability overvoltage or overcurrent occur, and controls rectification
Side electric current realizes that failure is restarted to zero.
Description of the drawings
Fig. 1 is a kind of converter unit protection circuit structure of the utility model；
Wherein, (a) is diode valve group cathode and does not have the voltage-source type valve terminal of DC Line Fault ride-through capability just
Pole connects, and is (b) that diode valve group anode is connect with the voltage-source type valve terminal cathode without DC Line Fault ride-through capability,
(c) it is connected with the anode of voltage-source type valve terminal for the cathode of current source type valve terminal, is (d) current source type valve terminal
Anode be connected with the cathode of voltage-source type valve terminal；
Fig. 2 is two kinds of sub-modular structures being typically used in modularization multi-level converter；
Wherein, (a) is half-bridge structure submodule, is (b) full bridge structure submodule；
Fig. 3 is the structure chart of current source type valve terminal；
Fig. 4 is the structure chart of voltage-source type valve terminal；
Fig. 5 is voltage source converter and its bypass resistance；
Fig. 6 be sending end be based on line commutation transverter, receiving end be based on voltage source converter Hybrid HVDC electricity
Line structure；
It is based on line commutation transverter cascaded structure, receiving end is based on line commutation transverter and to be based on that Fig. 7, which is sending end,
The concatenated Hybrid HVDC circuit structure of voltage source converter.
Specific implementation mode
The embodiments of the present invention are described by the following drawings, wherein identical component uses identical attached
Icon is remembered.Fig. 1 be the utility model proposes a kind of converter unit protection circuit, there is DC Line Fault ride-through capability for protect
Transverter, includes at least a bypass thyristor controlled series compensation 1, and connection type is in the transverter two with DC Line Fault ride-through capability
End bypass thyristor controlled series compensation 1 in parallel, the anode of bypass thyristor controlled series compensation 1 and the transverter with DC Line Fault ride-through capability are just
Extremely it is connected, the cathode for bypassing thyristor controlled series compensation 1 is connected with the cathode of the transverter with DC Line Fault ride-through capability.
Fig. 1 (a) and Fig. 1 (b) is diode valve group 2 and the voltage-source type valve terminal without DC Line Fault ride-through capability
It is connected in series with topological structure：Fig. 1 (a) is diode valve group cathode and the voltage-source type valve group without DC Line Fault ride-through capability
The cathode of the X1 connections of unit anode, the just extremely anode of diode valve group 2 of transverter, transverter is voltage-source type valve terminal
Cathode X2, the parallel connection of transverter both ends bypass thyristor controlled series compensation 1；Fig. 1 (b) is diode valve group anode and does not have DC Line Fault
The voltage-source type valve terminal cathode X2 connections of ride-through capability, the just extremely positive X1 of voltage-source type valve terminal of transverter,
The cathode of transverter is the cathode of diode valve group 2, and the parallel connection of transverter both ends bypasses thyristor controlled series compensation 1；Fig. 1 (c) is that have directly
The voltage-source type valve terminal both ends parallel connection for flowing fault ride-through capacity bypasses thyristor controlled series compensation 1；Fig. 1 (d) and Fig. 1 (e) is by electricity
Two kinds of mixed DC transverter topological structures that stream source type valve terminal and voltage-source type valve terminal are composed in series：Fig. 1 (d) is
The cathode X3 of current source type valve terminal is connected with the positive X1 of voltage-source type valve terminal, with DC Line Fault ride-through capability
The cathode of the just extremely anode X4 of current source type valve terminal of transverter, the transverter with DC Line Fault ride-through capability are electricity
The cathode X2 of potential source type valve terminal；Fig. 1 (e) is the anode X4 of current source type valve terminal and bearing for voltage-source type valve terminal
Pole X2 is connected, the just extremely positive X1 of voltage-source type valve terminal of the transverter with DC Line Fault ride-through capability, has straight
The cathode for flowing the transverter of fault ride-through capacity is the cathode X3 of current source type valve terminal.
Fig. 2 is two kinds of sub-modular structures being typically used in modularization multi-level converter, and Fig. 2 (a) is half-bridge structure
Submodule, be made of two IGBT switching devices and a capacitor, port A is its anode, and port B is its negative terminal, half-bridge
The submodule series connection of structure may make up the voltage source converter without DC Line Fault ride-through capability；Fig. 2 (b) is full bridge structure
Submodule is made of four IGBT switching devices and a capacitor, and port A is its anode, and port B is its negative terminal, full-bridge knot
The submodule series connection of structure may make up the voltage source converter with DC Line Fault ride-through capability；The submodule of Fig. 2 (a) and Fig. 2 (b)
Mixing series connection may make up the voltage source converter with DC Line Fault ride-through capability.
Fig. 3 is the structure chart of current source type valve terminal, and there are three types of structure types：Including line commutation transverter 3, such as scheme
Shown in 3 (a)；It is connected in parallel including line commutation transverter 3 and bypass cock 4, as shown in Fig. 3 (b)；Including the line commutation change of current
Device 3 is connected in parallel with bypass mechanical switch 4, and the unit both ends after parallel connection are connected with one end of connection disconnecting link 5 respectively, connect knife
The other end parallel connection of lock 5 bypasses disconnecting link 6, as shown in Fig. 3 (c).
Fig. 4 is the structure chart of voltage-source type valve terminal, and there are two types of structure types：Including voltage source converter, such as Fig. 4
(a) shown in；Including voltage source converter and its bypass resistance, as shown in Fig. 4 (b)；Including voltage source converter and its bypass electricity
Road, and both ends X5, X6 are connected with one end of connection disconnecting link 5 respectively, and the other end parallel connection of connection disconnecting link 5 bypasses disconnecting link 6, such as schemes
Shown in 4 (c).Wherein, there are three types of structure types for voltage source converter and its bypass resistance：Bypass mechanical switch or power electronics
Switch 8 and 7 parallel circuit of voltage source converter, as shown in Fig. 5 (a)；Bypass mechanical switch or electronic power switch 8 and inductance
9 connection after again with 7 parallel circuit of voltage source converter, as shown in Fig. 5 (b)；Voltage source converter 7 connect with inductance 9 after again with
Mechanical switch or 8 parallel circuit of electronic power switch are bypassed, as shown in Fig. 5 (c).
Line commutation transverter 3 is six pulsation or 12 pulsation three-phase bridge circuits, 12 pulsation three-phase bridge circuit packets
Include two six pulsation three-phase bridge circuits being connected in series with each other.Voltage source converter 7 is following any one or more：Two level
Transverter, diode-clamped multilevel converter, modularization multi-level converter MMC, mixed multi-level transverter HMC, two
Two level converter CTL of level cascade current converter CSL or stack.
Fig. 6 shows the transverter and inverter side that high-voltage dc transmission electric installation rectification side is made of current source type valve terminal
The transverter one formed is connected in series with by diode valve group 2 and the voltage-source type valve terminal without DC Line Fault ride-through capability
A embodiment.High-voltage dc transmission electric installation converting plant 24 is made of current source type valve terminal 23, and Inverter Station 25 is straight by not having
The voltage-source type valve terminal 21 and 22 of stream fault ride-through capacity separately constitutes its positive transverter and cathode transverter.Valve group 3
For line commutation transverter, it is connected with 16 secondary windings of high-voltage dc transmission piezoelectric transformer based on line commutation, valve group 7 is electricity
Source Con-verters are connected with 17 secondary windings of high-voltage dc transmission piezoelectric transformer based on voltage source converter.Converting plant 24 matches
Alternating current filter 20 is set, is connect with AC network 10 by alternating-current switch 19, harmonic wave is filtered out and reactive power is provided, passes through friendship
Flow switch 11 and 10 division of AC network.The surge current under bridge arm circulation and failure in order to inhibit voltage-source type valve group, if
Set bridge arm reactor 12；For the DC voltage and inhibition direct fault current of smooth direct current circuit, smoothing reactor 13 is set.
Ground connection polar conductor 18 is shown in Fig. 6, is used for the connection of transverter and earthing pole.Converting plant DC line 15 and ground connection polar conductor
Configuring direct current filter 14 between 18.The anode of Inverter Station voltage-source type valve terminal 21 is connect with the cathode of diode valve group 2,
Its both ends parallel connection bypasses thyristor controlled series compensation 1, and the cathode of Inverter Station voltage-source type valve terminal 22 connects with the anode of diode valve group 2
It connects, both ends parallel connection bypasses thyristor controlled series compensation 1.
Fig. 7 shows the transverter that high-voltage dc transmission electric installation rectification side is composed in series by current source type valve terminal and inverse
Become side and is connected in series with one implementation of mixed DC transverter formed by current source type valve terminal and voltage-source type valve terminal
Example.High-voltage dc transmission electric installation converting plant 24 is made of the concatenated topological structure of current source type valve terminal 28, Inverter Station 25 by
Mixed DC transverter 26 and 27 separately constitutes its positive transverter and cathode transverter.Valve group 3 is line commutation transverter,
Be connected with 16 secondary windings of high-voltage dc transmission piezoelectric transformer based on line commutation, valve group 7 be voltage source converter, with based on
17 secondary windings of high-voltage dc transmission piezoelectric transformer of voltage source converter is connected.Converting plant 24 configures alternating current filter 20, passes through
Alternating-current switch 19 is connect with AC network 10, is filtered out harmonic wave and is provided reactive power, passes through alternating-current switch 11 and AC network
10 divisions.The surge current under bridge arm circulation and failure in order to inhibit voltage-source type valve group, setting bridge arm reactor 12；In order to
The DC voltage and inhibition direct fault current of smooth direct current circuit, are arranged smoothing reactor 13.Ground connection polar conductor is shown in Fig. 7
18, it is used for the connection of transverter and earthing pole.Configuring direct current filters between converting plant DC line 15 and ground connection polar conductor 18
Device 14.The both ends of Inverter Station mixed DC transverter 26 and 27 are in parallel respectively to bypass thyristor controlled series compensation 1.
Voltage-source type valve terminal 21 or 22 in Fig. 6 detects failure, input bypass thyristor controlled series compensation 1, and by failure
Information is transmitted to converting plant 24, for instantaneously can self- recoverage or the failure that can be isolated, such as the instantaneous singlephase earth fault of AC system,
The current source type valve terminal 23 of converting plant 24 reduces DC voltage, reduces DC current, control bypass 1 electric current of thyristor controlled series compensation
It is turned off to zero, after failure vanishes, restarts DC transmission system；For the failure that is instantaneously unable to self- recoverage or cannot be isolated, such as electricity
Source Con-verters faults itself is latched DC transmission system.Voltage-source type valve terminal in Fig. 7 detects that failure, input are other
Logical thyristor controlled series compensation 1, and fault message is transmitted to converting plant 24, for instantaneously energy self- recoverage or the failure that can be isolated, such as hand over
The current source type valve terminal 23 of the instantaneous singlephase earth fault of streaming system, converting plant 24 reduces DC voltage, reduces DC current,
Control bypass 1 electric current of thyristor controlled series compensation is turned off to zero, after failure vanishes, restarts DC transmission system；For instantaneously cannot be from extensive
Multiple failure, such as voltage source converter faults itself, blocking voltage source transverter and isolated fault；For the event that cannot be isolated
Barrier is latched DC transmission system such as valve group connecting line earth fault.
Above example is only to illustrate the technological thought of the utility model, and the protection model of the utility model cannot be limited with this
Enclose, it is every according to the utility model proposes technological thought, any change done on the basis of technical solution each falls within this reality
Within the scope of novel protected.
Claims (12)
1. a kind of converter unit protection circuit, for protecting the voltage source converter in voltage-source type valve terminal, which is characterized in that
Using one of following three kinds of schemes：
Scheme one：Including at least a bypass thyristor controlled series compensation and a diode valve group, connection type is the diode valve
Group is connected with the voltage-source type valve terminal without DC Line Fault ride-through capability, forms changing with DC Line Fault ride-through capability
Device is flowed, thyristor controlled series compensation is bypassed in the transverter both ends parallel connection with DC Line Fault ride-through capability, bypasses the sun of thyristor controlled series compensation
Pole is connected with the anode of the transverter, and the cathode for bypassing thyristor controlled series compensation is connected with the cathode of the transverter；
Scheme two：Including at least a bypass thyristor controlled series compensation and a current source type valve terminal；Connection type is current source
Type valve terminal is connected with the voltage-source type valve terminal without DC Line Fault ride-through capability, and composition is passed through with DC Line Fault
The transverter of ability；Thyristor controlled series compensation is bypassed in the transverter both ends parallel connection with DC Line Fault ride-through capability, bypasses thyristor
The anode of valve group is connected with the anode of the transverter, and the cathode for bypassing thyristor controlled series compensation is connected with the cathode of the transverter；
Scheme three：Including at least a bypass thyristor controlled series compensation, the anode for bypassing thyristor controlled series compensation is passed through with DC Line Fault
The anode of the voltage-source type valve terminal of ability is connected, and bypasses the cathode of thyristor controlled series compensation and has DC Line Fault ride-through capability
The cathode of voltage-source type valve terminal is connected.
2. a kind of converter unit protection circuit as described in claim 1, it is characterised in that：The diode valve group with without straight
The voltage-source type valve terminal of stream fault ride-through capacity is connected in series with there are two types of topological structure：
(1) cathode of diode valve group is connected with the anode of voltage-source type valve terminal；Or
(2) anode of diode valve group is connected with the cathode of voltage-source type valve terminal；
Structure planted for (1), the just extremely anode of diode valve group of the transverter with DC Line Fault ride-through capability,
The cathode of the transverter with DC Line Fault ride-through capability is the cathode of voltage-source type valve terminal；(2) are planted and are tied
Structure, the just extremely anode of voltage-source type valve terminal of the transverter with DC Line Fault ride-through capability, it is described have it is straight
The cathode for flowing the transverter of fault ride-through capacity is the cathode of diode valve group.
3. a kind of converter unit protection circuit as described in claim 1, it is characterised in that：It is described to pass through energy without DC Line Fault
The voltage-source type valve terminal of power is the DC side fault traversing that itself can not achieve DC transmission system, described not have direct current
The voltage-source type valve terminal of fault ride-through capacity is following any one or more：Two level converters, diode-clamped are more
Level converter, half-bridge structure submodule composition modularization multi-level converter MMC, two level cascade current converter CSL or
Two level converter CTL of stack；The diode valve group is made of multiple Diode series.
4. a kind of converter unit protection circuit as described in claim 1, it is characterised in that：It is described that there is DC Line Fault ride-through capability
Voltage-source type valve terminal be the DC side fault traversing that itself can realize DC transmission system, be without DC Line Fault
Increasing auxiliary power electronic device on the basis of the voltage source converter of ride-through capability inhibits reverse current to realize, described to have direct current
The voltage-source type valve terminal of fault ride-through capacity is following any one or more：The modularization of full bridge structure submodule composition is more
Level converter MMC, two level cascade current converter CSL, two level converter CTL of stack, half-bridge and full bridge structure submodule
The mixing module multilevel converter HMC or diode-clamped modularization multi-level converter of block composition.
5. a kind of converter unit protection circuit as described in claim 1, it is characterised in that：The current source type valve terminal with not
Voltage-source type valve terminal with DC Line Fault ride-through capability is connected in series with there are two types of topological structure：
(1) cathode of current source type valve terminal is connected with the anode of voltage-source type valve terminal；Or
(2) anode of current source type valve terminal is connected with the cathode of voltage-source type valve terminal；
Structure, the just extremely current source type valve terminal of the transverter with DC Line Fault ride-through capability are planted for (1)
Anode；The cathode of the transverter with DC Line Fault ride-through capability is the cathode of voltage-source type valve terminal；For
(2) structure, the just extremely anode of voltage-source type valve terminal of the transverter with DC Line Fault ride-through capability are planted；It is described
The cathode of transverter with DC Line Fault ride-through capability is the cathode of current source type valve terminal.
6. a kind of converter unit protection circuit as claimed in claim 5, it is characterised in that：The current source type valve terminal includes
Line commutation transverter；Or including line commutation transverter and bypass cock, the two is connected in parallel；Or including line commutation
Transverter and bypass cock and disconnecting link component, line commutation transverter are connected in parallel with bypass cock, the unit both ends after parallel connection
It is connected respectively with one end of connection disconnecting link, connects the other end parallel connection bypass disconnecting link of disconnecting link.
7. a kind of converter unit protection circuit as claimed in claim 6, it is characterised in that：The line commutation transverter is six arteries and veins
Dynamic bridge circuit or 12 pulsation bridge circuits, are made of the half control type power semiconductor that can not be turned off.
8. a kind of converter unit protection circuit as described in claim 1, it is characterised in that：The voltage-source type valve terminal includes
Voltage source converter；Or voltage source converter and its bypass resistance；Or including voltage source converter and its bypass resistance and
Disconnecting link component, and voltage source converter and its bypass resistance both ends are connected with one end of connection disconnecting link respectively, connect disconnecting link
Other end parallel connection bypasses disconnecting link.
9. a kind of converter unit protection circuit as claimed in claim 8, it is characterised in that：The voltage source converter and its bypass
Circuit is voltage source converter and bypass cock parallel circuit；Or after bypass cock and inductance connection again with voltage source converter
Parallel circuit；Or after voltage source converter and inductance connection again with bypass cock parallel circuit.
10. a kind of converter unit protection circuit as described in claim 1, it is characterised in that：The voltage source converter is by that can close
Disconnected full-control type power semiconductor composition；The full-control type power semiconductor turned off is following any one or more：Insulation
Grid bipolar transistor IGBT, integrated gate commutated thyristor IGCT, turn-off thyristor GTO, Power MOSFET Power
MOSFET, electron injection enhancement grid crystal IEGT, door pole stream-exchanging thyristor GCT or SiC reinforcement type junction field effect transistor
SiC-JFET。
11. a kind of converter unit protection circuit as described in claim 1, it is characterised in that：The bypass thyristor controlled series compensation only wraps
It containing a bridge arm, is made of multiple Thyristors in series, and includes corresponding control protection electric circuit；Or the bypass thyristor valve
Group is the bypass pair of line commutation transverter in parallel or is realized by the quick phase shift of line commutation transverter of the parallel connection.
12. a kind of converter unit protection circuit as claimed in claim 11, it is characterised in that：After the multiple Thyristors in series
Beginning or end series direct current change-over switch or isolation switch.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201820299324.3U CN208094430U (en) | 2018-03-05 | 2018-03-05 | A kind of converter unit protection circuit |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201820299324.3U CN208094430U (en) | 2018-03-05 | 2018-03-05 | A kind of converter unit protection circuit |
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| CN208094430U true CN208094430U (en) | 2018-11-13 |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108199571A (en) * | 2018-03-05 | 2018-06-22 | 南京南瑞继保电气有限公司 | A kind of converter unit protection circuit and guard method and device |
| CN109347136A (en) * | 2018-11-23 | 2019-02-15 | 南京南瑞继保电气有限公司 | A kind of online extractor of Hybrid HVDC system inverter and method |
-
2018
- 2018-03-05 CN CN201820299324.3U patent/CN208094430U/en active Active
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108199571A (en) * | 2018-03-05 | 2018-06-22 | 南京南瑞继保电气有限公司 | A kind of converter unit protection circuit and guard method and device |
| WO2019170042A1 (en) * | 2018-03-05 | 2019-09-12 | 南京南瑞继保电气有限公司 | Protection circuit of converter, and protection method and device |
| CN109347136A (en) * | 2018-11-23 | 2019-02-15 | 南京南瑞继保电气有限公司 | A kind of online extractor of Hybrid HVDC system inverter and method |
| CN109347136B (en) * | 2018-11-23 | 2022-01-14 | 南京南瑞继保电气有限公司 | Online withdrawing device and method for current converter of hybrid direct-current power transmission system |
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