CN104065044B - Overcurrent protecting device for high-voltage tandem valve and method thereof - Google Patents
Overcurrent protecting device for high-voltage tandem valve and method thereof Download PDFInfo
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Abstract
The invention discloses an overcurrent protecting device for a high-voltage tandem valve, which comprises the components of: a valve set control unit, an overcurrent detecting unit and a flexible Rogowski coil. The overcurrent detecting unit is mounted at the side of a primary high-voltage tandem valve. The flexible Rogowski coil is mounted on the high-voltage tandem valve. The overcurrent detecting unit detects the current state of the high-voltage tandem valve, and reports an optical pulse back to the valve set control unit. The valve set control unit changes a triggered pulse according to the back-reported optical pulse, thereby switching on and off the high-voltage tandem valve. The overcurrent protecting device has advantages of: simple structure, high reliability, low cost of a protecting circuit, and easy popularization in similar application occasions. The invention further discloses an overcurrent protecting method for the high-voltage tandem valve.
Description
Technical field
The invention belongs to applied power electronics field, particularly to a kind of high-pressure series valve overcurrent protective device and method.
Background technology
Because single power electronic element is pressure limited, need to carry out power electronic element in some high pressure applications
It is used in series.Generally series valve over-current protection method has using Hall sampling high pressure valve electric current and current transformer sampling valve electricity
Stream.
Hall element needs to provide direct-current working volts, is therefore typically used in the relatively low occasion of electric pressure.In electricity
In Force system STACOM or these application scenarios of HVDC Flexible, high pressure threshold voltage is usually above 20kV, and insulation request is very
The suitability of height, therefore Hall sampling this method of high pressure valve electric current is relatively low.
Current transformer is widely used in the power system such as high voltage power transmission application scenario, becomes and realizes in high voltage power transmisson system
Measurement and the visual plant of protection, are generally divided into electromagnetic current transducer and electronic current mutual inductor.
Electromagnetic current transducer is based on electromagnetic induction principle, there is electromagnetism saturation problem.Protect to realize excessively stream simultaneously
Shield, the high pressure needing design complicated takes energy circuit, is typically designed to a line influence and takes the side that can match with laser power supply
Formula.Light energy mainly can be sent to hot side from low-pressure side by optical fiber using laser or other light source by laser power supply,
Again by electrooptical device（Light cell）Light energy is converted to electric flux, provides stable power supply defeated after DC/DC conversion
Go out.Photronic conversion efficiency is relatively low, the finite energy being provided that, detection and return component are required for choosing relatively costly
Low-power consumption components and parts.
Electronic current mutual inductor, based on new photoelectron technology and optical fiber transmission technique, is divided into passive type electronics at present
Formula current transformer and active electronic mutual inductor.Passive type electronic mutual inductor is a kind of full light formula electronic mutual inductor,
Its stability does not also solve, and technology is simultaneously immature；Active electronic mutual inductor there is also the problem of high pressure energy supply.
The high pressure valve being used in series for high pressure occasion wholly-controled device, currently without simple and reliable, lower-cost mistake
Stream guard method.
Content of the invention
The purpose of the present invention, is to provide a kind of high-pressure series valve overcurrent protective device and method, and it is simple, reliable, protects
Protection circuit low cost, and be easy to promote in similar application occasion.
In order to reach above-mentioned purpose, the solution of the present invention is：
A kind of high-pressure series valve overcurrent protective device, including valve group control unit, over-current detection unit and flexible Luo line
Circle, described over-current detection unit is installed on a high-pressure series valve side, and flexible Luo-coil is installed on high-pressure series valve, excessively stream
Detector unit detection stream crosses the current conditions of high pressure series valve, and light pulse is returned to valve group control unit；Described valve group control
Unit processed changes trigger pulse according to the light pulse of return, controls high-pressure series valve to open and turn off.
Above-mentioned high-pressure series valve includes a full-control type power electronic assembly or at least two full-control type power electronic assemblies
Series connection, when only including a full-control type power electronic assembly, its colelctor electrode as the anode of high-pressure series valve, make by emitter stage
Negative terminal for high-pressure series valve；If being in series by least two full-control type power electronic assemblies, the emitter stage of each assembly is even
The colelctor electrode of an assembly followed by, and using the colelctor electrode of first assembly as high-pressure series valve anode, by last
The emitter stage of assembly is as the negative terminal of high-pressure series valve.
Above-mentioned flexible Luo-coil is uniformly wound on the insulator of softness by thin wire and makes, and this insulator center
There is a loop line.
Above-mentioned flexible Luo-coil is fitted around on high-pressure series valve, high-pressure series valve is passed through soft by anode to negative terminal
Property Luo-coil constitute closed-loop；Described flexible Luo-coil has positive and negative two outfans, and positive output end connects over-current detection
Unit anode, negative output terminal connects over-current detection unit negative terminal.
Above-mentioned over-current detection unit includes a diode, light emitting diode, two Zener diodes, two resistance
With an audion, the anode of the second diode connects the negative terminal of the first Zener diode, and collectively as over-current detection unit
Anode；The negative terminal of described second diode connects the anode of the first light emitting diode, and the negative terminal of the first light emitting diode is even
Connect the colelctor electrode of the first audion, the base stage of described first audion connects the negative terminal of the second diode, institute via first resistor
The base stage stating the first audion also connects the emitter stage of the first audion, the emitter stage of described first audion via second resistance
Connect the negative terminal of the second Zener diode, and the negative terminal collectively as over-current detection unit；Described first and second Zener diode
Anode is connected.
Above-mentioned over-current detection unit includes a diode, light emitting diode, two Zener diodes, two resistance
With a MOSFET, the anode of the 4th diode connects the negative terminal of the 3rd Zener diode, and collectively as over-current detection unit
Anode, the negative terminal of described 4th diode connects the anode of the 3rd light emitting diode, and the negative terminal of the 3rd light emitting diode is even
Connect the drain electrode of MOSFET, the grid of described MOSFET connects the negative terminal of the 4th diode via 3rd resistor, described MOSFET's
Grid also connects the source electrode of MOSFET via the 4th resistance, and the source electrode of described MOSFET connects the negative terminal of the 4th Zener diode,
And the negative terminal collectively as over-current detection unit；The anode of third and fourth Zener diode described is connected.
Above-mentioned over-current detection unit include three resistance, an electric capacity, a light emitting diode, two Zener diodes and
One audion, one end of the 5th resistance connects electric capacity respectively as the anode of over-current detection unit, the other end of the 5th resistance
One end, the anode of the negative terminal, one end of the 6th resistance and the 5th light emitting diode of the 5th Zener diode；Described 5th voltage stabilizing
The anode of diode connects the anode of the 6th Zener diode, and the negative terminal of the 5th light emitting diode connects the current collection of the second audion
Pole, the base stage of the second audion connects the other end of the 6th resistance, and the base stage of described second audion is also via the 7th resistance even
Connect the emitter stage of the second audion；The emitter stage of described second audion, the negative terminal of the 6th Zener diode and electric capacity another
End is common to be connected, and the negative terminal as over-current detection unit.
A kind of high-pressure series valve over-current protection method, comprises the steps：
（1）Described valve group control unit receives the control pulse of higher level's control unit, is converted into the triggering of high-pressure series valve
Pulse；
（2）During the work of high-pressure series valve, over-current detection unit returns light pulse to valve group control unit；
（3）Judge whether valve group control unit can receive return light pulse, if can not receive, judge overcurrent protective device event
Barrier, if can receive, goes to step（4）；
（4）Valve group control unit judges whether valve group excessively stream according to light impulse length, in the event of excessively stream, then valve group
Control unit blocks trigger pulse immediately.
Above-mentioned steps（4）In, if light impulse length is 5～10uS, valve group control unit judges valve group excessively stream.
After such scheme, the present invention is a kind of simple, reliable, lower-cost high-pressure series valve overcurrent protection side
Case, when high-pressure series valve occurs over current fault, quick detection can be out of order and return to valve group control unit by optical fiber,
Valve group control unit responds rapidly to return signal, and the fastest 10uS blocks trigger pulse, protects high-pressure series valve；Mistake in the present invention
Stream detector unit need not extra powering device, convenient to install and maintain；Control side and a Fiber isolation, being particularly suitable for high pressure should
With field it is easy to apply in the high pressure valve that full-control type power electronic element is constituted, method is simple and reliable, set without extra insulation
Standby, being easily integrated, applied widely.
Brief description
Fig. 1 is the structural representation of apparatus of the present invention；
Fig. 2 is the structural representation of apparatus of the present invention mesohigh series valve；
Fig. 3 is the structural representation of flexible Luo-coil in apparatus of the present invention；
Fig. 4 is the first implementing circuit figure of over-current detection unit in the present invention；
Fig. 5 is over-current detection unit second implementing circuit figure in the present invention；
Fig. 6 is the third implementing circuit figure of over-current detection unit in the present invention；
Fig. 7 is key signal oscillogram during normal work in the present invention；
Fig. 8 is using key signal oscillogram after over-current protection method during valve short circuit in the present invention；
Fig. 9 is using key signal oscillogram after over-current protection method during the short circuit of circuit valve shown in Fig. 6.
Specific embodiment
Below with reference to accompanying drawing, technical scheme is described in detail.
As shown in figure 1, the present invention provides a kind of high-pressure series valve overcurrent protective device, including valve group control unit 2, excessively stream
Detector unit 5 and flexible Luo-coil 6, described over-current detection unit 5 is installed on a high-pressure series valve side, flexible Luo-coil
6 are installed on high-pressure series valve, and over-current detection unit 5 detection stream crosses the current conditions of high pressure series valve, and IP light pulse is led to
Cross optical fiber 4 to return to valve group control unit 2；By controlling, pulse CP passes through optical fiber to higher level's control unit or electric pathway 1 is sent to valve
Group control unit 2, produces trigger pulse FP after valve group control unit 2 receives this pulse and according to the light pulse of return, FP leads to
Cross optical fiber or electric pathway 3 controls high-pressure series valve to open and turn off, thus protecting high-pressure series valve.
As shown in Fig. 2 being the structural representation of mesohigh series valve of the present invention, described high-pressure series valve is by full-control type electric power
Electronic building brick is composed in series, and merely illustrates the structure of four IGBT assembly high-pressure series valves in series, certain basis in Fig. 2
Running voltage needs to have the IGBT assembly of greater number to connect, and specific connected mode is：The current collection of the first IGBT assembly
Pole is as the anode of high-pressure series valve, and the emitter stage of an IGBT assembly is connected with the colelctor electrode of the 2nd IGBT assembly, the
The emitter stage of two IGBT assemblies is connected with the colelctor electrode of the 3rd IGBT assembly, the emitter stage of the 3rd IGBT assembly and the 4th IGBT group
The colelctor electrode of part connects, and the emitter stage of the 4th IGBT assembly is as the negative terminal of high-pressure series valve, if there are greater number
IGBT assembly is connected, and is also the colelctor electrode that the emitter stage of previous IGBT assembly connects a rear IGBT assembly, and the two of head and the tail
Individual IGBT assembly is respectively as the anode of high-pressure series valve and negative terminal.
It is the structural representation of flexible Luo-coil in the present invention shown in Fig. 3, it is uniformly wound on softness by thin wire
On insulator, there is a loop line at insulator center；One section of described flexible Luo-coil can be separated, thus conveniently in high-pressure series
Install on valve and keep in repair；Described flexible Luo-coil is fitted around on high-pressure series valve, by high-pressure series valve by anode to negative
The closed-loop that end is constituted through flexible Luo-coil；Described flexible Luo-coil has positive and negative two outfans, and positive output end connects
Over-current detection unit anode, negative output terminal connects over-current detection unit negative terminal, flows through high pressure by the change reflection of both end voltage
The curent change of series valve.
The output voltage of flexible Luo-coil with flow through the current related of high-pressure series valve, if flexible Luo-coil is mutual
Feel for M, then flexible Luo-coil output voltage and the electric current flowing through high-pressure series valve have following relation：
Wherein, VdExport induced voltage, i for flexible Luo-coilceFor flowing through the electric current of high-pressure series valve, t is the time.According to
Determine the change flowing through high-pressure series valve according to the value that this equation can export induced voltage by measuring flexible Luo-coil
Rate.
It is the first implementing circuit figure of over-current detection unit in the present invention shown in Fig. 4, described over-current detection unit just has
Negative two ends, the anode of described diode D2 connects the negative terminal of Zener diode Z1, and the anode collectively as over-current detection unit,
The anode of the negative terminal connecting luminous diode D1 of described D2, and the colelctor electrode of the negative terminal connecting triode T1 of D1, described audion
The base stage of T1 connects the negative terminal of D2 via resistance R1, and the base stage of described T1 also connects the emitter stage of T1, described T1 via resistance R2
Emitter stage connect the negative terminal of Zener diode Z2, and the negative terminal collectively as over-current detection unit；The anode of described Z2 and Z1
Anode be connected.Described Zener diode Z1 and Z2 protects the components and parts in over-current detection unit to be unlikely to high crushing jointly
Bad, and resistance R1 and R2 connects and opens threshold for set audion T1.
When light emitting diode D1 lights, signal is returned to valve group control unit by optical fiber, Zener diode Z1 and Z2 connects
It is connected in parallel on the outfan of flexible Luo-coil, namely the input of over-current detection unit afterwards, be responsible for protection and limit flexible Luo line
Circle output voltage is unlikely to too high；Diode D2 is responsible for the output voltage rectification of flexible Luo-coil, and flexible Luo-coil is defeated
When going out voltage for bearing, over-current detection unit does not return light pulse；Resistance R1 and R2 series connection, the points of common connection of the two and audion
The base stage of T1 is connected, and when the base voltage of T1 reaches 0.7V, T1 is open-minded, and D1 starts to light, and valve group control unit receives return
Light pulse, by this convolution（1）The current-rising-rate threshold flowing through high-pressure series valve can be set：
For example, it is desired to high-pressure series valve electric current rising threshold is arranged on 100A/ μ S, M is 0.1 μ H, and R2 is 7k Ω, permissible
Show that R1 is 93k Ω.
The technical staff with circuit base is not difficult to find out, the audion in circuit shown in Fig. 4 can use MOSFET（Gold
Belong to oxide layer field-effect transistor）Substitute, then can obtain the over-current detection unit second implementing circuit figure described in Fig. 5,
The anode of described diode D4 connects the negative terminal of Zener diode Z3, and the anode collectively as over-current detection unit, described D4
Negative terminal connecting luminous diode D3 anode, and the negative terminal of D3 connect MOSFET M1 drain electrode, the grid of described M1 is via electricity
Resistance R3 connects the negative terminal of D4, and the grid of described M1 also connects the source electrode of M1 via resistance R4, and the source electrode of described M1 connects voltage stabilizing two
The negative terminal of pole pipe Z4, and the negative terminal collectively as over-current detection unit；The anode of described Z4 is connected with the anode of Z3.
It is the third implementing circuit figure of over-current detection unit in the present invention, wherein, one end conduct of resistance R5 shown in Fig. 6
The anode of over-current detection unit, is connected with the outfan of flexible Luo-coil, the other end of R5 connect respectively one end of electric capacity C2,
The anode of the negative terminal of Zener diode Z5, one end of resistance R6 and light emitting diode D5；The anode of described Zener diode Z5 is even
Connect the anode of Zener diode Z6, the colelctor electrode of the negative terminal connecting triode T2 of D5, the base stage of T2 connects the other end of R6, described
The base stage of T2 also connects the emitter stage of T2 via resistance R7；The other end of the emitter stage of described T2, the negative terminal of Z6 and C2 connects jointly
Connect, and the negative terminal as over-current detection unit.Described resistance R5 and electric capacity C2 constitutes integrating circuit, C2 both end voltage variation tendency
Consistent with the curent change trend flowing through high-pressure series valve；Resistance R6, R7 configured in series electric capacity C2 both end voltage reaches an electricity
During pressure definite value, audion T2 is open-minded.
The present invention also provides a kind of high-pressure series valve over-current protection method, comprises the steps：
（1）Described valve group control unit receives the control pulse of higher level's control unit, is converted into the triggering of high-pressure series valve
Pulse；
（2）During the work of high-pressure series valve, over-current detection unit returns light pulse to valve group control unit；
（3）Judge whether valve group control unit can receive return light pulse, if can not receive, judge overcurrent protective device event
Barrier, if can receive, goes to step（4）；
（4）Valve group control unit according to light impulse length judge whether occur valve group excessively stream, if light impulse length be 5～
During 10uS, judge excessively stream, then valve group control unit blocks trigger pulse immediately.
As shown in fig. 7, being key signal waveform during normal work, CP is that higher level's control unit sends to valve group control unit
Control pulse, FP controls the triggering light of IGBT Component driver unit in Fig. 2 for valve group control unit.Ice is to flow through height
The electric current of pressure series valve, the electric pulse that Vge sends to IGBT assembly for driver element.Vd is flexible Luo-coil output voltage,
The light pulse that IP returns to valve group control unit for over-current detection unit.From key signal, the t0 moment controls FP to uprise,
Vge is also now -10V, and t1 moment Vge begins to ramp up, and t2 moment Ice begins to ramp up, and IGBT series valve is open-minded, t3 moment valve group
Electric current rises to peak I ce1, and t4 moment Reverse recovery terminates, and valve group electric current drops to Ice2, and t5 moment CP is changed into low, higher level
Control unit turns off high-pressure series valve, and t6 moment valve group electric current rises to peak Ice3, and Vge voltage begins to decline, the t7 moment
Valve group electric current is down to zero.It is not difficult to draw：
High-power IGBT assembly open more slow, but service time be less than 5uS, therefore t3-t2=Δt1Less than 5uS, high
The current-rising-rate change that pressure series valve flows through when normally opening is as follows：T2 to t3 rises comparatively fast, and t4 to the t6 stage rises relatively slowly,
Therefore V1 magnitude of voltage is higher, and V2 voltage is relatively low.When being short-circuited, flow through high-pressure series valve electric current rapid increase, then set door
Sill voltage V2<Vd<V1, when return optical pulse time is judged as high-pressure series valve short trouble more than setting value Δ td, sets Δ
td>5uS.
As shown in figure 8, being key signal waveform when being short-circuited, t8 moment FP uprises, and higher level's control unit sends out
Port valve group pulse, t9 moment Vge voltage begins to ramp up, and t10 moment Ice begins to ramp up, and be short-circuited fault, Ice rapid increase,
Therefore V4 voltage exceedes valve group short-circuit protection threshold voltage setting value Vd, and t11 moment valve group control unit receives return light pulse
Time is more than setting value Δ td, is therefore judged as valve group short trouble, valve group control unit locking triggering light, Vge
Voltage begins to decline.T12 moment Ice rises to maximum Ice4, and t13 moment Ice drops to zero, and high-pressure series valve reliably closes
Disconnected.
As shown in figure 9, being the key signal waveform of high-pressure series valve the third implementing circuit of over-current protection method, during t16
Open high-pressure series valve pulse quarter, CP and FP uprises, t17 moment Vge voltage begins to ramp up, and the t18 moment flows through high-pressure series valve
Electric current Ice begins to ramp up, and due to the fault that is short-circuited, Ice climbing is very fast, and the voltage Vc on electric capacity C2 in such as Fig. 6 also begins to
Rise, the continuation with Ice rises, t19 moment Vc voltage reaches setting threshold value V8, over-current detection unit passes through optical fiber to valve
Group control unit return light pulse, when pulse width reaches setting value Δ t3, and Δ t3 is set to minimum value, 500nS～2uS
Between, valve group control unit locking trigger pulse, turn off high-pressure series valve.Then t20 moment FP signal step-down, Vge voltage is opened
Begin to decline, flow through high-pressure series valve electric current Ice and also begin to decline, t21 moment Ice drops to zero, and on electric capacity, voltage Vc also declines
To zero.
Above example technological thought only to illustrate the invention is it is impossible to limit protection scope of the present invention with this, every
According to technological thought proposed by the present invention, any change done on the basis of technical scheme, each fall within the scope of the present invention
Within.
Claims (6)
1. a kind of high-pressure series valve overcurrent protective device it is characterised in that：Including valve group control unit, over-current detection unit and soft
Property Luo-coil, described over-current detection unit is installed on a high-pressure series valve side, and flexible Luo-coil is installed on high-pressure series
On valve, over-current detection unit detection stream crosses the current conditions of high pressure series valve, and light pulse is returned to valve group control unit；Institute
State valve group control unit and trigger pulse is changed according to the light pulse of return, control high-pressure series valve to open and turn off；
Described over-current detection unit adopts any one in following three kinds of structures：
The first：Described over-current detection unit include a diode, light emitting diode, two Zener diodes, two
Resistance and an audion, the anode of the second diode connects the negative terminal of the first Zener diode, and collectively as over-current detection
The anode of unit；The negative terminal of described second diode connects the anode of the first light emitting diode, and the first light emitting diode is negative
End connects the colelctor electrode of the first audion, and the base stage of described first audion connects the negative of the second diode via first resistor
End, the base stage of described first audion also connects the emitter stage of the first audion via second resistance, described first audion
Emitter stage connects the negative terminal of the second Zener diode, and the negative terminal collectively as over-current detection unit；Described first and second voltage stabilizing two
The anode of pole pipe is connected；
Second：Described over-current detection unit include a diode, light emitting diode, two Zener diodes, two
Resistance and a MOSFET, the anode of the 4th diode connects the negative terminal of the 3rd Zener diode, and collectively as over-current detection
The anode of unit, the negative terminal of described 4th diode connects the anode of the 3rd light emitting diode, and the 3rd light emitting diode is negative
End connects the drain electrode of MOSFET, and the grid of described MOSFET connects the negative terminal of the 4th diode via 3rd resistor, described
The grid of MOSFET also connects the source electrode of MOSFET via the 4th resistance, and the source electrode of described MOSFET connects the 4th Zener diode
Negative terminal, and the negative terminal collectively as over-current detection unit；The anode of third and fourth Zener diode described is connected；
The third：Described over-current detection unit includes three resistance, electric capacity, light emitting diode, two voltage stabilizing two poles
Pipe and an audion, one end of the 5th resistance connects respectively as the anode of over-current detection unit, the other end of the 5th resistance
One end of electric capacity, the anode of the negative terminal, one end of the 6th resistance and the 5th light emitting diode of the 5th Zener diode；Described 5th
The anode of Zener diode connects the anode of the 6th Zener diode, and the negative terminal of the 5th light emitting diode connects the second audion
Colelctor electrode, the base stage of the second audion connects the other end of the 6th resistance, and the base stage of described second audion is also via the 7th electricity
Resistance connects the emitter stage of the second audion；The emitter stage of described second audion, the negative terminal of the 6th Zener diode and electric capacity
The other end connects jointly, and the negative terminal as over-current detection unit.
2. as claimed in claim 1 a kind of high-pressure series valve overcurrent protective device it is characterised in that：Described high-pressure series valve bag
Include a full-control type power electronic assembly or the series connection of at least two full-control type power electronic assemblies, when only including a full-control type
During power electronics assembly, as the anode of high-pressure series valve, emitter stage is as the negative terminal of high-pressure series valve for its colelctor electrode；If by extremely
Few two full-control type power electronic assemblies are in series, then the emitter stage of each assembly connects the colelctor electrode of an assembly thereafter, and
Using the colelctor electrode of first assembly as high-pressure series valve anode, using the emitter stage of last assembly as high-pressure series valve
Negative terminal.
3. as claimed in claim 2 a kind of high-pressure series valve overcurrent protective device it is characterised in that：Described flexible Luo-coil
Uniformly it is wound on the insulator of softness by thin wire and makes, and there is a loop line at this insulator center.
4. as claimed in claim 2 or claim 3 a kind of high-pressure series valve overcurrent protective device it is characterised in that：Described flexible Luo
Coil encircling is arranged on high-pressure series valve, the closing that high-pressure series valve is made up of through flexible Luo-coil anode to negative terminal
Ring；Described flexible Luo-coil has positive and negative two outfans, and positive output end connects over-current detection unit anode, and negative output terminal connects
Over-current detection unit negative terminal.
5. a kind of high-pressure series valve over-current protection method it is characterised in that：Using valve group control unit, over-current detection unit and soft
Property Luo-coil, described over-current detection unit is installed on a high-pressure series valve side, and flexible Luo-coil is installed on high-pressure series
On valve, over-current detection unit detection stream crosses the current conditions of high pressure series valve, and light pulse is returned to valve group control unit；Institute
State valve group control unit and trigger pulse is changed according to the light pulse of return, control high-pressure series valve to open and turn off；Methods described
Comprise the steps：
(1) described valve group control unit receives the control pulse of higher level's control unit, is converted into the trigger pulse of high-pressure series valve；
(2), during the work of high-pressure series valve, over-current detection unit returns light pulse to valve group control unit；
(3) judge whether valve group control unit can receive return light pulse, if can not receive, judge overcurrent protective device fault,
If can receive, go to step (4)；
(4) valve group control unit judges whether valve group excessively stream according to light impulse length, in the event of excessively stream, then valve group control
Unit blocks trigger pulse immediately.
6. as claimed in claim 5 a kind of high-pressure series valve over-current protection method it is characterised in that：In described step (4), such as
Fruit light impulse length is 5～10uS, then valve group control unit judges valve group excessively stream.
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| CN201310093968.9A CN104065044B (en) | 2013-03-22 | 2013-03-22 | Overcurrent protecting device for high-voltage tandem valve and method thereof |
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| CN104065044B true CN104065044B (en) | 2017-02-08 |
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Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH07143734A (en) * | 1993-11-17 | 1995-06-02 | Toyo Electric Mfg Co Ltd | Driver circuit for voltage driving type element |
| CN1193842A (en) * | 1997-03-19 | 1998-09-23 | 国际整流器有限公司 | Current sensing circuit for pulse width modulated motor drive |
| CN202094613U (en) * | 2011-06-02 | 2011-12-28 | 深圳市汇川技术股份有限公司 | IGBT current foldback circuit |
| CN202550515U (en) * | 2012-04-01 | 2012-11-21 | 上海市电力公司 | High-power IGBT (insulated gate bipolar transistor) comprehensive overcurrent protection circuit |
-
2013
- 2013-03-22 CN CN201310093968.9A patent/CN104065044B/en active Active
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH07143734A (en) * | 1993-11-17 | 1995-06-02 | Toyo Electric Mfg Co Ltd | Driver circuit for voltage driving type element |
| CN1193842A (en) * | 1997-03-19 | 1998-09-23 | 国际整流器有限公司 | Current sensing circuit for pulse width modulated motor drive |
| CN202094613U (en) * | 2011-06-02 | 2011-12-28 | 深圳市汇川技术股份有限公司 | IGBT current foldback circuit |
| CN202550515U (en) * | 2012-04-01 | 2012-11-21 | 上海市电力公司 | High-power IGBT (insulated gate bipolar transistor) comprehensive overcurrent protection circuit |
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| CN104065044A (en) | 2014-09-24 |
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