CN105866602A - High-voltage direct current power transformation converter valve phase change failure resistance device - Google Patents
High-voltage direct current power transformation converter valve phase change failure resistance device Download PDFInfo
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- CN105866602A CN105866602A CN201610405713.5A CN201610405713A CN105866602A CN 105866602 A CN105866602 A CN 105866602A CN 201610405713 A CN201610405713 A CN 201610405713A CN 105866602 A CN105866602 A CN 105866602A
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
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Abstract
The invention provides a high-voltage direct current power transformation converter valve phase change failure resistance device, which comprises a thyristor state monitoring unit, a transmission channel and an upper layer control unit, wherein the thyristor state monitoring unit monitors the operation parameters of a thyristor in real time, and sends the parameters to the upper layer control unit through the transmission channel; the upper layer control unit generates the phase change failure information of a single valve according to the thyristor operation parameters transmitted by the thyristor state monitoring unit of the same single valve in converter valves; a direct current control protection system executes the corresponding control logics according to the phase change failure information. Compared with the prior art, the high-voltage direct current power transformation converter valve phase change failure resistance device provided by the invention has the advantages that the phase change failure of the converter valve can be fast judged in 1.5ms; the capability of the converter valve for resisting the phase change failure is enhanced.
Description
Technical field
The present invention relates to electric and electronic technical field, be specifically related to a kind of high voltage direct current transmission converter valve commutation failure defence installation.
Background technology
In DC transmission system when inverter and inverter generation commutation failure fault, converter transformer DC magnetic bias can be caused, change
The problems such as stream overheated, the overvoltage of valve, the most insecondary commutation failure fault is also possible to cause DC transmission system locking, impact
The stability of electrical network.
The main cause of inverter and inverter generation commutation failure fault is that two converter valve of inverter or inverter are changed
Phase time, fails to fail to recover blocking ability during the converter valve of complete or anticipated shutoff closes the backward voltage had no progeny at commutation process,
If the backward voltage time that in converter valve, IGCT two ends apply is the shortest, IGCT once bears forward voltage, it is not necessary to trigger arteries and veins
Punching also can turn on again.Converter valve can bear forward voltage after the normal commutation of IGCT, still lead after IGCT commutation failure
Logical, its both end voltage is close to zero.Therefore, it can after IGCT commutation a period of time, measure the electricity at IGCT two ends continuously
Pressure, if described both end voltage is close to zero, commutation failure, if forward voltage, commutation success are born in IGCT two ends.
Summary of the invention
In order to meet the needs of prior art, the invention provides a kind of high voltage direct current transmission converter valve commutation failure defence installation.
The technical scheme is that
Described defence installation includes IGCT Condition Monitoring Unit, transmission channel and top level control unit；
Described IGCT Condition Monitoring Unit monitors the operational factor of IGCT in real time, and is sent extremely by described transmission channel
Described top level control unit；
The IGCT that described top level control unit transmits according to the IGCT Condition Monitoring Unit of single valve same in described converter valve
Operational factor generates the commutation failure information of described single valve；DC control and protection system performs corresponding according to described commutation failure information
Control logic.
The optimal technical scheme that the present invention further provides is: configure the quantity of described IGCT Condition Monitoring Unit in described single valve
At least one, it is at most the quantity of IGCT level in described single valve；Each described IGCT Condition Monitoring Unit monitors one respectively
The operational factor of IGCT in described IGCT level.
The optimal technical scheme that the present invention further provides is: the operational factor of described IGCT include the voltage of IGCT, electric current,
Voltage change ratio, current changing rate and power；Described IGCT Condition Monitoring Unit judges described single valve according to described operational factor
Middle IGCT whether normal turn-off；Whether described top level control unit judges described converter valve according to the off state of described IGCT
There is commutation failure.
The optimal technical scheme that the present invention further provides is: described IGCT Condition Monitoring Unit judges described according to described voltage
In single valve, whether normal turn-off includes IGCT:
Determine that described IGCT turns off the consequence time period by forward voltage；Obtain the terminal voltage of IGCT in the described time period: if
The value of described terminal voltage is the success of forward voltage values the most described IGCT normal turn-off, if the value of described terminal voltage is close to zero, institute
State the failure of IGCT normal turn-off.
The optimal technical scheme that the present invention further provides is: described IGCT Condition Monitoring Unit judges described according to described electric current
In single valve, whether normal turn-off includes IGCT:
Determine that described IGCT turns off the consequence time period by forward voltage；Obtain the main circuit current of IGCT in the described time period:
If the value of described main circuit current reaches turn on thyristors preset current value, described IGCT normal turn-off is failed, the most the normally off
It is broken into merit.
The optimal technical scheme that the present invention further provides is: described IGCT Condition Monitoring Unit is sentenced according to described voltage change ratio
In disconnected described single valve, whether normal turn-off includes IGCT:
If the both end voltage rate of change of IGCT reaches preset value, the failure of the most described IGCT normal turn-off, otherwise normal turn-off becomes
Merit.
The optimal technical scheme that the present invention further provides is: described IGCT Condition Monitoring Unit is sentenced according to described current changing rate
In disconnected described single valve, whether normal turn-off includes IGCT:
If the two ends current changing rate of IGCT reaches preset value, the failure of the most described IGCT normal turn-off, otherwise normal turn-off becomes
Merit.
The optimal technical scheme that the present invention further provides is: described IGCT Condition Monitoring Unit judges described according to described power
In single valve, whether normal turn-off includes IGCT:
If the power of IGCT reaches preset value, the failure of the most described IGCT normal turn-off, otherwise normal turn-off success.
The optimal technical scheme that the present invention further provides is: described top level control unit judges institute according to the off state of IGCT
State whether converter valve occurs commutation failure to include:
When occurring the IGCT number of stages that normal turn-off is failed to reach preset value in described single valve, the most described single valve generation commutation is lost
Losing, described top level control unit sends the commutation failure information of described single valve to described DC control and protection system.
The optimal technical scheme that the present invention further provides is: described DC control and protection system is held according to described commutation failure information
The corresponding logic that controls of row includes:
According to the Trigger Angle of commutation failure information regulation IGCT, and the converter valve that will include the Trigger Angle after this regulation triggers and believes
Number by described top level control unit send described IGCT Condition Monitoring Unit.
The optimal technical scheme that the present invention further provides is: described IGCT Condition Monitoring Unit includes taking energy/accumulator, uses
In powering to described IGCT Condition Monitoring Unit；Described energy/the accumulator that takes includes that first takes energy/energy-storage module and/or second and take
Energy/energy-storage module.
The optimal technical scheme that the present invention further provides is: described first takes energy/energy-storage module, gathers and stores in described single valve
The backward described IGCT Condition Monitoring Unit of electric energy in IGCT level loop is powered.
The optimal technical scheme that the present invention further provides is: described second takes energy/energy-storage module, receives outside Laser Power Devices output
Energy, and be converted into electric energy and power to described IGCT Condition Monitoring Unit.
The optimal technical scheme that the present invention further provides is: described defence installation includes IGBT group unit；Described IGCT
Condition Monitoring Unit and described IGBT group unit are with independent of one another；
Described IGBT group unit, receives the converter valve triggering signal that described top level control unit issues, and sends it to change
The thyristor gate polar circuit of stream valve.
The optimal technical scheme that the present invention further provides is: described IGCT Condition Monitoring Unit, is additionally operable to receive described upper strata
The converter valve that control unit issues triggers signal, and sends it to the thyristor gate polar circuit of converter valve.
Compared with immediate prior art, the invention has the beneficial effects as follows:
1, a kind of high voltage direct current transmission converter valve commutation failure defence installation that the present invention provides, sentences according to the operational factor of IGCT
Whether this IGCT disconnected there is normal turn-off failure fault, with fast monitored to IGCT, whether normal turn-off failure can occur, for
In time fault restriction develops further and provides guarantee；
2, a kind of high voltage direct current transmission converter valve commutation failure defence installation that the present invention provides, IGCT Condition Monitoring Unit 11
Including two kinds of embodiments, one is that IGCT Condition Monitoring Unit 11 is independent of one another with IGBT group unit 4, and two is IGCT
Condition Monitoring Unit 11 is provided simultaneously with status monitoring and Trigger Function, and two kinds of embodiments all go in fortune and building high pressure
The converter valve technology upgrading of DC transmission engineering；
3, a kind of high voltage direct current transmission converter valve commutation failure defence installation that the present invention provides, top level control unit 13 is according to crystalline substance
Brake tube commutation status information judges whether converter valve occurs normal turn-off failure fault, eliminates DC control and protection system 2 to crystalline substance
Brake tube condition monitoring and the process of judgement, can not trigger front it is confirmed that commutation failure situation at next single valve, and can be
Next single valve adjusts Trigger Angle before triggering in time, is conducive to avoiding the generation of continuous commutation failure and limits commutation failure further
Development；
4, a kind of high voltage direct current transmission converter valve commutation failure defence installation that the present invention provides, compared to direct current control in prior art
Protection system processed uses indirect measurement method to judge that converter valve commutation failure response time needs 20ms, and the present invention can be at 1.5ms
Inside being accurately judged to converter valve commutation failure and transmit to DC control and protection system, response speed greatly speeds up.
Accompanying drawing explanation
Fig. 1: a kind of high voltage direct current transmission converter valve commutation failure defence installation schematic diagram in the embodiment of the present invention；
Fig. 2: a kind of high voltage direct current transmission converter valve commutation failure defence installation connection diagram in the embodiment of the present invention；
Fig. 3: another kind of high voltage direct current transmission converter valve commutation failure defence installation connection diagram in the embodiment of the present invention；
Fig. 4: commutation failure based on IGCT terminal voltage monitoring waveform diagram in the embodiment of the present invention；
Fig. 5: commutation failure based on IGCT main circuit current monitoring waveform diagram in the embodiment of the present invention；
Fig. 6: optical transmitting set schematic diagram in IGCT Condition Monitoring Unit in the embodiment of the present invention；
Fig. 7: optical receiver schematic diagram in IGCT Condition Monitoring Unit in the embodiment of the present invention；
Fig. 8: first take energy/energy-storage module operating diagram in IGCT Condition Monitoring Unit in the embodiment of the present invention；
Fig. 9: second take energy/energy-storage module operating diagram in IGCT Condition Monitoring Unit in the embodiment of the present invention；
Figure 10: embodiment of the present invention control unit structural representation at the middle and upper levels；
Wherein, 11: IGCT Condition Monitoring Unit；111: IGCT state acquisition unit；112: Logical processing unit；1131:
First takes energy/energy-storage module；Take energy/energy-storage module at 1132: the second；114: light emission subelement；12: transmission channel；13:
Top level control unit；131: optical transceiver；132: Logical processing unit；133: power module；2；DC control protection is
System；3: IGCT；4: IGBT group unit；5: Laser Power Devices；6: current conversion station power supply.
Detailed description of the invention
For making the purpose of the embodiment of the present invention, technical scheme and advantage clearer, attached below in conjunction with in the embodiment of the present invention
Figure, clearly and completely illustrates the technical scheme in the embodiment of the present invention, it is clear that described embodiment is the present invention
A part of embodiment rather than whole embodiments.Based on the embodiment in the present invention, those of ordinary skill in the art are not having
Make the every other embodiment obtained under creative work premise, broadly fall into the scope of protection of the invention.
Combine accompanying drawing separately below, a kind of high voltage direct current transmission converter valve commutation failure defence installation that the embodiment of the present invention is provided
Illustrate.
Fig. 1 is a kind of high voltage direct current transmission converter valve commutation failure defence installation schematic diagram in the embodiment of the present invention, as it can be seen,
In the present embodiment, defence installation includes IGCT Condition Monitoring Unit 11, transmission channel 12 and top level control unit 13.Wherein,
IGCT Condition Monitoring Unit 11 monitors the operational factor of IGCT in real time, and is passed through transmission channel 12 and send to institute
State top level control unit 13, according to described operational factor, IGCT Condition Monitoring Unit 11 judges that in single valve, IGCT is the most normal
Turn off.
Top level control unit 13, according to the IGCT of IGCT Condition Monitoring Unit 11 transmission of same single valve in converter valve
Operational factor generates the commutation failure information of described single valve, i.e. top level control unit 13 and judges described according to the off state of IGCT
Whether converter valve there is commutation failure.DC control and protection system performs to control logic accordingly according to commutation failure information.
Separately below IGCT Condition Monitoring Unit 11, top level control unit 13 and transmission channel 12 are specifically described.
1, IGCT Condition Monitoring Unit 11
The quantity configuring IGCT Condition Monitoring Unit 11 in the present invention in each single valve of converter valve is at least one, is at most single valve
The quantity of middle IGCT level；Each IGCT Condition Monitoring Unit 11 monitors the operation ginseng of IGCT in an IGCT level respectively
Number.IGCT level in i.e. one single valve can configure IGCT Condition Monitoring Unit 11 at part IGCT, it is also possible to all joins
Put IGCT Condition Monitoring Unit 11.
In the present invention, the operational factor of IGCT can include but not limited to the voltage of IGCT, electric current, voltage change ratio, electric current
Rate of change and power, IGCT Condition Monitoring Unit 11 judges in single valve IGCT whether normal turn-off bag according to above-mentioned operational factor
Include following five kinds of embodiments:
(1) first embodiment
In the present embodiment, to judge whether this IGCT occurs according to the terminal voltage of IGCT the most the normally off for IGCT Condition Monitoring Unit 11
Unsuccessfully fault of breaking includes:
Step S11: determine that IGCT turns off the consequence time period by forward voltage；
Step S12: the terminal voltage of IGCT in the acquisition time period:
If the value of terminal voltage is forward voltage values, the success of described IGCT normal turn-off, if the value of terminal voltage is close to zero, brilliant lock
The failure of pipe normal turn-off.
Fig. 4 is that in the embodiment of the present invention, normal turn-off based on IGCT terminal voltage unsuccessfully monitors waveform diagram, as it can be seen,
During IGCT normal turn-off success, its both end voltage bears forward voltage, and during normal turn-off failure, its both end voltage is zero.This enforcement
In example, the terminal voltage according to IGCT judges whether this IGCT occurs normal turn-off failure fault, can be with fast monitored to IGCT
Whether there is normal turn-off failure, develop further for timely fault restriction and provide guarantee.
(2) second embodiments
In the present embodiment, according to the main circuit current of IGCT, IGCT Condition Monitoring Unit 11 judges whether this IGCT just occurs
Normally-off failed fault includes:
Step S21: determine that IGCT turns off the consequence time period by forward voltage；
Step S22: the main circuit current of IGCT in the acquisition time period:
If the value of main circuit current reaches turn on thyristors preset current value, the failure of IGCT normal turn-off, otherwise normal turn-off becomes
Merit.
Fig. 5 is that in the present embodiment, normal turn-off based on IGCT main circuit current unsuccessfully monitors waveform diagram, as it can be seen,
During IGCT normal turn-off success, its main circuit current only has small electric current, and this current value all pushes back close to damping circuit and direct current
The electric current sum on road；Current value when its main circuit current reaches turn on thyristors during IGCT normal turn-off failure.The present embodiment
The middle main circuit current according to IGCT judges whether this IGCT occurs normal turn-off failure fault, can be with fast monitored to brilliant lock
Whether pipe there is normal turn-off failure, develops further for timely fault restriction and provides guarantee.
(3) the 3rd embodiments
In the present embodiment, according to the voltage change ratio of IGCT, IGCT Condition Monitoring Unit 11 judges that in single valve, IGCT is the most just
Normally-off include: if the both end voltage rate of change of IGCT reaches preset value, then the failure of IGCT normal turn-off, the most the normally off
It is broken into merit.
In the present embodiment, the both end voltage rate of change according to IGCT judges whether this IGCT occurs normal turn-off failure fault, can
Whether there is normal turn-off failure with fast monitored to IGCT, develop further for timely fault restriction and provide guarantee.
(4) the 4th embodiments
In the present embodiment, according to the current changing rate of IGCT, IGCT Condition Monitoring Unit 11 judges that in single valve, IGCT is the most just
Normally-off include: if the two ends current changing rate of IGCT reaches preset value, then the failure of IGCT normal turn-off, the most the normally off
It is broken into merit.
In the present embodiment, the two ends current changing rate according to IGCT judges whether this IGCT occurs normal turn-off failure fault, can
Whether there is normal turn-off failure with fast monitored to IGCT, develop further for timely fault restriction and provide guarantee.
(5) the 5th embodiments
In the present embodiment, IGCT Condition Monitoring Unit 11 judges in single valve IGCT whether normal turn-off according to the power of IGCT
Including: if the power of IGCT reaches preset value, then IGCT normal turn-off failure, otherwise normal turn-off success.
In the present embodiment, the power according to IGCT judges whether this IGCT occurs normal turn-off failure fault, can be with fast monitored
Whether there is normal turn-off failure to IGCT, develop further for timely fault restriction and provide guarantee.
In the present invention, IGCT Condition Monitoring Unit 11 includes taking energy/accumulator, for supplying to IGCT Condition Monitoring Unit 11
Electricity.The present invention takes energy/accumulator and includes that first takes energy/energy-storage module 1131 and/or second and take energy/energy-storage module 1132,
Separately below both is taken energy/energy-storage module to illustrate.
(1) first takes energy/energy-storage module
In the present embodiment, first takes the electric energy that energy/energy-storage module 1131 gathered and stored the IGCT level loop of single valve in converter valve,
In IGCT Condition Monitoring Unit 11, modules provides electric energy.
Fig. 8 is first to take energy/energy-storage module operating diagram in IGCT Condition Monitoring Unit in the embodiment of the present invention, such as figure institute
Showing, first takes energy/energy-storage module 1131 gathers the electric energy in IGCT level loop, respectively to IGCT state acquisition subelement 111,
Logical processing unit 112 and light emission subelement 114 are powered, in the present embodiment first take energy/energy-storage module 1131 can be to crystalline substance
Brake tube Condition Monitoring Unit 11 provides uninterrupted electric energy.Wherein,
IGCT state acquisition subelement 111, for gathering the operational factor of IGCT level, and enters the operational factor collected
Row code conversion becomes the signal of telecommunication to send Logical processing unit 112 to.
Logical processing unit 112, receives the IGCT operational factor that IGCT state acquisition subelement collects, carries out logic meter
Calculate, it is judged that this IGCT whether normal turn-off, and will determine that information and close the angle of rupture and send light emission subelement 114 to.
Light emission subelement 114, turns off information by the IGCT received and closes the angle of rupture, by opto-electronic conversion, being converted into optical signal
Send top level control unit 13 to.
(2) second take energy/energy-storage module
In the present embodiment, second takes energy/energy-storage module 1132 and receives the energy of outside Laser Power Devices output, and is converted into electric energy
Power to IGCT Condition Monitoring Unit 11.
Fig. 9 is second to take energy/energy-storage module operating diagram in IGCT Condition Monitoring Unit in the embodiment of the present invention, such as figure institute
Show, in the present embodiment second take energy/energy-storage module 1132 receive Laser Power Devices 5 output energy be converted to electric energy, respectively to crystalline substance
Brake tube state acquisition subelement 111, Logical processing unit 112 and light emission subelement 114 are powered, and in the present embodiment, second takes
Energy/energy-storage module 1132 can provide uninterrupted electric energy to IGCT Condition Monitoring Unit 11.Wherein,
IGCT state acquisition subelement 111, for gathering the operational factor of IGCT level, and enters the operational factor collected
Row code conversion becomes the signal of telecommunication to send Logical processing unit 112 to.
Logical processing unit 112 receives the IGCT operational factor that IGCT state acquisition subelement collects, and carries out logical calculated,
Judge this IGCT whether normal turn-off, and will determine that information and close the angle of rupture and send light emission subelement 114 to.
The IGCT received is turned off information and closes the angle of rupture by light emission subelement 114, by opto-electronic conversion, is converted into optical signal and passes
Give top level control unit 13.
In the present invention, IGCT Condition Monitoring Unit 11 carries out status monitoring to IGCT and triggering includes two kinds of solid yardage cases, below right
Both embodiments are specifically described:
(1) first embodiment
In the present embodiment, defence installation includes IGBT group unit 4, IGBT group list 4 and IGCT Condition Monitoring Unit 11
Independently of one another.Wherein, IGBT group unit 4, receive the converter valve triggering signal that top level control unit 13 issues, and by it
Send the thyristor gate polar circuit to converter valve.
Fig. 2 is a kind of high voltage direct current transmission converter valve commutation failure defence installation connection diagram in the embodiment of the present invention, such as figure institute
Showing, defence installation includes IGBT group unit 4, and IGBT group unit 4 is independent of one another with IGCT Condition Monitoring Unit 12.
In the present embodiment, IGBT group unit 4 with IGCT Condition Monitoring Unit 12 independently of one another, goes in fortune and is building height
The converter valve technology upgrading of pressure DC transmission engineering.
(2) second embodiments
In the present embodiment, IGCT Condition Monitoring Unit 11 not only comprises above-mentioned IGCT status monitoring function, is also integrated with converter valve
The function of original IGBT group unit, i.e. in the present embodiment, IGCT Condition Monitoring Unit 11 is additionally operable to receive top level control list
The converter valve that unit 13 issues triggers signal, and sends it to the thyristor gate polar circuit of converter valve.
Fig. 3 is another kind of high voltage direct current transmission converter valve commutation failure defence installation connection diagram in the embodiment of the present invention, such as figure
Shown in, IGCT Condition Monitoring Unit 11 by integrated to IGCT status monitoring and Trigger Function, go for fortune and
Build the converter valve technology upgrading of high voltage direct current transmission project.
2, top level control unit 13
According to the off state of IGCT, the present embodiment control unit 13 at the middle and upper levels judges whether converter valve occurs commutation failure to include:
When single valve occurring the failed IGCT number of stages of normal turn-off reach preset value, then single valve generation commutation failure, described on
Layer control unit sends the commutation failure information of described single valve to DC control and protection system.Such as:
Step S31: the generation normal turn-off failure that when setting corresponding single valve generation commutation failure fault in converter valve, it comprises
Quantity N of IGCT；
Step S32: foundation IGCT off state signal determines quantity M of the IGCT that converter valve generation normal turn-off is failed；
If quantity M of IGCT >=N, then corresponding single valve generation commutation failure fault in converter valve；If quantity M of IGCT < N,
Then corresponding single valve commutation success in converter valve.
Further, if direct-current transmission converter valve is 12 pulse conversion valves in the present embodiment, each of which single valve comprises P IGCT,
Then 12 pulse conversion valves have P*12 IGCT.Set in 12 pulse conversion valves N number of IGCT in P IGCT of single valve
It is commutation failure that normal turn-off failure then this 12 pulse conversion valve occurs.Now, if top level control unit 13 detects 12 pulsation
M IGCT generation normal turn-off failure in P IGCT of single valve in converter valve, if M >=N, then 12 pulse conversion valves are sent out
Raw commutation failure fault；If M < N, then 12 pulse conversion valve commutation success.
According to IGCT off state, the present embodiment control unit 13 at the middle and upper levels judges whether converter valve occurs commutation failure fault, save
Gone DC control and protection system 2 to IGCT condition monitoring and the process of judgement, can be before next single valve trigger
It is confirmed that commutation failure situation, and Trigger Angle can be adjusted in time before next single valve triggers, be conducive to avoiding continuous commutation failure
Generation and limit commutation failure develop further.
Below in conjunction with the accompanying drawings present invention control unit 13 structure at the middle and upper levels is specifically described:
Figure 10 is the structural representation of embodiment of the present invention control unit 13 at the middle and upper levels, as it can be seen, the present embodiment is controlled at the middle and upper levels
Unit processed includes optical transceiver 131, Logical processing unit 132 and power module 133.Wherein,
Optical transceiver 131 includes light-receiving subelement and light emission subelement: light-receiving subelement, reception sends the optical signal of coming
And it is decoded conversion, it is converted into the signal of telecommunication and sends Logical processing unit 132 to.Optical Transmit Unit, receives from logical process
The signal of telecommunication of unit 132 is also converted into optical signal, is sent to DC control and protection system 2 or IGCT Condition Monitoring Unit 12.
Logical processing unit 132, receives the IGCT off state signal that IGCT Condition Monitoring Unit 11 sends, and judges to change
Whether stream valve single valve there is commutation failure, the trigger message that DC control and protection system 2 sends is converted into Trigger Angle simultaneously and issues
To thyristor gate polar circuit, IGBT group is controlled.
Power module 133, introduces current conversion station power supply, powers for optical transceiver 131 and Logical processing unit 132.
In the present invention, DC control and protection system 2 includes according to the corresponding logic that controls of described commutation failure information execution:
According to the Trigger Angle of commutation failure information regulation IGCT, and the converter valve that will include the Trigger Angle after this regulation triggers and believes
Number send IGCT Condition Monitoring Unit 11, the described converter valve of IGCT Condition Monitoring Unit the last 11 by top level control unit 13
Trigger signal and send the thyristor gate polar circuit to converter valve, trigger corresponding IGCT.
3, transmission channel 12
In the present invention, transmission channel 12 can transmit the inside and outside optical signal of defence installation, the signal of telecommunication or electromagnetic wave signal
Deng.Fig. 6 and Fig. 7 respectively illustrates IGCT Condition Monitoring Unit 11 and uses the schematic diagram of optical signal transmission, as it can be seen, CP
Signal is the signal of telecommunication comprising IGCT off state signal, and CP ' signal is the optical signal comprising IGCT off state signal,
TP signal is the signal of telecommunication comprising IGBT group signal, and TP ' signal is the optical signal comprising IGBT group signal.
The defence installation that the present invention provides goes for the current conversion station of different capabilities and structure, if converter valve is 12 pulse conversions
Valve, then the defence installation configuration mode of current conversion stations based on 12 pulse conversion valves may include that
1, comprise two 12 pulse conversion valves ± 500kV or ± 600kV current conversion station, configuration two set defence installations.
2, comprise two 12 pulse conversion valves ± 800kV or ± 1100kV current conversion station, configuration four set defence installations.
3, comprise the back-to-back converter substation of two 12 pulse conversion valves, be respectively configured two set defence in the both sides of back-to-back converter substation
Device.
A kind of high voltage direct current transmission converter valve commutation failure defence installation that the present invention provides, it is possible to be accurately judged in 1.5ms
Converter valve commutation failure is also transmitted to DC control and protection system, and response speed greatly speeds up, and can not trigger at next single valve
Before it is confirmed that commutation failure situation, and Trigger Angle can be adjusted in time before next single valve triggers, be conducive to avoiding continuous commutation to lose
The generation and the restriction commutation failure that lose develop further.And DC control and protection system uses indirect measurement method to sentence in prior art
Disconnected converter valve commutation failure response time needs 20ms, and after causing converter valve generation commutation failure, failure condition at least to maintain one
Just can be found after individual cycle of operation, it is impossible to avoid commutation failure spreading between single valve.
One of ordinary skill in the art will appreciate that all or part of flow process realizing in above-described embodiment method, can be by meter
Calculation machine program instructs relevant hardware and completes, and described program can be stored in a computer read/write memory medium, this journey
Sequence is upon execution, it may include such as the flow process of the embodiment of above-mentioned each method.Wherein, described storage medium can be magnetic disc, CD,
Read-only store-memory body (Read-Only, ROM) or random store-memory body (Random Access Memory, RAM) etc..
Obviously, those skilled in the art can carry out various change and modification without deviating from the spirit of the present invention and model to the present invention
Enclose.So, if these amendments of the present invention and modification belong within the scope of the claims in the present invention and equivalent technologies thereof, then
The present invention is also intended to comprise these and changes and modification.
Claims (15)
1. a high voltage direct current transmission converter valve commutation failure defence installation, it is characterised in that described defence installation includes IGCT
Condition Monitoring Unit, transmission channel and top level control unit；
Described IGCT Condition Monitoring Unit monitors the operational factor of IGCT in real time, and is sent extremely by described transmission channel
Described top level control unit；
The IGCT that described top level control unit transmits according to the IGCT Condition Monitoring Unit of single valve same in described converter valve
Operational factor generates the commutation failure information of described single valve；DC control and protection system performs corresponding according to described commutation failure information
Control logic.
2. a kind of high voltage direct current transmission converter valve commutation failure defence installation as claimed in claim 1, it is characterised in that described
The quantity configuring described IGCT Condition Monitoring Unit in single valve is at least one, is at most the quantity of IGCT level in described single valve；
Each described IGCT Condition Monitoring Unit monitors the operational factor of IGCT in a described IGCT level respectively.
3. a kind of high voltage direct current transmission converter valve commutation failure defence installation as claimed in claim 1, it is characterised in that described
The operational factor of IGCT includes the voltage of IGCT, electric current, voltage change ratio, current changing rate and power；Described IGCT
Condition Monitoring Unit judges in described single valve IGCT whether normal turn-off according to described operational factor；Described top level control unit depends on
Judge whether described converter valve occurs commutation failure according to the off state of described IGCT.
4. a kind of high voltage direct current transmission converter valve commutation failure defence installation as claimed in claim 3, it is characterised in that described
According to described voltage, IGCT Condition Monitoring Unit judges in described single valve whether normal turn-off includes IGCT:
Determine that described IGCT turns off the consequence time period by forward voltage；Obtain the terminal voltage of IGCT in the described time period: if
The value of described terminal voltage is the success of forward voltage values the most described IGCT normal turn-off, if the value of described terminal voltage is close to zero, institute
State the failure of IGCT normal turn-off.
5. a kind of high voltage direct current transmission converter valve commutation failure defence installation as claimed in claim 3, it is characterised in that described
According to described electric current, IGCT Condition Monitoring Unit judges in described single valve whether normal turn-off includes IGCT:
Determine that described IGCT turns off the consequence time period by forward voltage；Obtain the main circuit current of IGCT in the described time period:
If the value of described main circuit current reaches turn on thyristors preset current value, described IGCT normal turn-off is failed, the most the normally off
It is broken into merit.
6. a kind of high voltage direct current transmission converter valve commutation failure defence installation as claimed in claim 3, it is characterised in that described
According to described voltage change ratio, IGCT Condition Monitoring Unit judges in described single valve whether normal turn-off includes IGCT:
If the both end voltage rate of change of IGCT reaches preset value, the failure of the most described IGCT normal turn-off, otherwise normal turn-off becomes
Merit.
7. a kind of high voltage direct current transmission converter valve commutation failure defence installation as claimed in claim 3, it is characterised in that described
According to described current changing rate, IGCT Condition Monitoring Unit judges in described single valve whether normal turn-off includes IGCT:
If the two ends current changing rate of IGCT reaches preset value, the failure of the most described IGCT normal turn-off, otherwise normal turn-off becomes
Merit.
8. a kind of high voltage direct current transmission converter valve commutation failure defence installation as claimed in claim 3, it is characterised in that described
According to described power, IGCT Condition Monitoring Unit judges in described single valve whether normal turn-off includes IGCT:
If the power of IGCT reaches preset value, the failure of the most described IGCT normal turn-off, otherwise normal turn-off success.
9. a kind of high voltage direct current transmission converter valve commutation failure defence installation as claimed in claim 3, it is characterised in that described
According to the off state of IGCT, top level control unit judges whether described converter valve occurs commutation failure to include:
When occurring the IGCT number of stages that normal turn-off is failed to reach preset value in described single valve, the most described single valve generation commutation is lost
Losing, described top level control unit sends the commutation failure information of described single valve to described DC control and protection system.
10. a kind of high voltage direct current transmission converter valve commutation failure defence installation as claimed in claim 1, it is characterised in that institute
State DC control and protection system to include according to the corresponding logic that controls of described commutation failure information execution:
According to the Trigger Angle of commutation failure information regulation IGCT, and the converter valve that will include the Trigger Angle after this regulation triggers and believes
Number by described top level control unit send described IGCT Condition Monitoring Unit.
11. a kind of high voltage direct current transmission converter valve commutation failure defence installations as claimed in claim 1, it is characterised in that institute
State IGCT Condition Monitoring Unit to include taking energy/accumulator, for powering to described IGCT Condition Monitoring Unit；Described take energy
/ accumulator includes that first takes energy/energy-storage module and/or second and take energy/energy-storage module.
12. a kind of high voltage direct current transmission converter valve commutation failure defence installations as claimed in claim 11, it is characterised in that institute
State first and take energy/energy-storage module, gather and store the backward described IGCT status monitoring of the electric energy in IGCT level loop in described single valve
Unit is powered.
13. a kind of high voltage direct current transmission converter valve commutation failure defence installations as claimed in claim 11, it is characterised in that institute
State second and take energy/energy-storage module, receive the energy of outside Laser Power Devices output, and be converted into electric energy to described IGCT state
Monitoring means is powered.
14. a kind of high voltage direct current transmission converter valve commutation failure defence installations as claimed in claim 1, it is characterised in that institute
State defence installation and include IGBT group unit；Described IGCT Condition Monitoring Unit and described IGBT group unit are with the most only
Vertical；
Described IGBT group unit, receives the converter valve triggering signal that described top level control unit issues, and sends it to change
The thyristor gate polar circuit of stream valve.
15. a kind of high voltage direct current transmission converter valve commutation failure defence installations as claimed in claim 1, it is characterised in that institute
State IGCT Condition Monitoring Unit, be additionally operable to receive the converter valve triggering signal that described top level control unit issues, and be sent to
Thyristor gate polar circuit to converter valve.
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| CN201610405713.5A CN105866602A (en) | 2016-06-08 | 2016-06-08 | High-voltage direct current power transformation converter valve phase change failure resistance device |
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| CN201610405713.5A CN105866602A (en) | 2016-06-08 | 2016-06-08 | High-voltage direct current power transformation converter valve phase change failure resistance device |
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