CN201286085Y - SCR self power supply gate triggering board - Google Patents
SCR self power supply gate triggering board Download PDFInfo
- Publication number
- CN201286085Y CN201286085Y CNU2008200910971U CN200820091097U CN201286085Y CN 201286085 Y CN201286085 Y CN 201286085Y CN U2008200910971 U CNU2008200910971 U CN U2008200910971U CN 200820091097 U CN200820091097 U CN 200820091097U CN 201286085 Y CN201286085 Y CN 201286085Y
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- circuit
- voltage
- trigger board
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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
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E40/00—Technologies for an efficient electrical power generation, transmission or distribution
- Y02E40/30—Reactive power compensation
Abstract
The utility model provides a SCR self-powered gate pole trigger board, which comprises a high potential energy-fetching unit, a low potential energy-fetching unit, an integrated voltage-stabilizing unit, a SCR driving unit, SCR over voltage protection units, a SCR ultra-temperature and undervoltage alarming unit. The high potential energy-fetching unit and the low potential energy-fetching unit are respectively connected with the integrated voltage-stabilizing unit, the integrated voltage-stabilizing unit is respectively connected with the SCR over voltage protection units, SCR ultra-temperature and undervoltage alarming unit, the SCR ultra-temperature and undervoltage alarming unit is respectively connected with the SCR over voltage protection units. The primary function of the utility model is characterized by receiving triggering light impulse signals, fulfilling the trigger of a gate circuit transistor of the high potential, and having the functions of SCR over voltage protection, trigger board under-voltage protection and gate circuit transistor overtemperature fault alarm loopback low order circuit.
Description
(1) technical field
The utility model belongs to electric and electronic technical field, a kind of specifically final stage circuits for triggering that are applied to series thyristor in the high-voltage power electronic installations such as alternating current-direct current transmission of electricity, static reactive, soft start.
(2) background technology
The development of power electronic technology and in application on power system, the static passive compensation device of thyristor has been pushed to the stage of reactive power compensation, and occupied the leading position of static passive compensation device gradually, so static passive compensation device (SVC) has become the static passive compensation device of special use thyristor.Static passive compensation device mainly comprises thuristor throw-in and throw-off reactor (TCR) and thyristor switchable capacitor (TSC).The brilliant pipe of pricking is a crucial element in static passive compensation device (SVC) device, and critical effect is played in operation reliably to device security.Therefore, good triggering and the effective protection measure to thyristor is very important in the power electronic equipment.
The main task of triggering system is the gate pole that the triggering control signal of electronegative potential is sent to the thyristor of high potential.Generally can adopt 3 kinds of methods; (1) electromagnetism triggering mode is about to the low level triggering signal and delivers to high-order gate circuit transistor gate after the pulse transformer isolation.This mode electromagnetic interference is serious, and it is technical very difficult to make the withstand voltage pulse transformer of several ten thousand volts.(2) direct sunshine triggering mode is about to start pulse signal and changes light pulse into, directly triggers high-order photo thyristor.Since the domestic basic amorphous products of photo thyristor, and external product costs an arm and a leg, so can't adopt this mode at present.(3) indirect light triggering mode promptly utilizes the method for optical fiber communication, and the low level start pulse signal is delivered to a high position, is coupled to gate circuit transistor gate after treatment.This mode both can overcome electromagnetic interference, can adopt triode thyristor again, reduced system cost.We adopt this mode, and wherein, high-order electronic unit circuit major function is to receive the triggering light signal, finishes the triggering of thyristor, simultaneously with operating state, fault-signal loopback low level circuit.Therefore, high-order electronic unit circuit is a critical component in triggering system, and critical effect is played in the normal operation of whole system.
(3) summary of the invention
The purpose of this utility model provides a kind of high-order electronic unit circuit SCR self-powered gate pole trigger board that adopts the coupling energy method of getting to obtain working power; major function is to receive the triggering light signal; finish the triggering of the thyristor of high potential, have the function of SCR overvoltage protection, trigger board under-voltage protection and thyristor overtemperature fault alarm loopback low level circuit.
The purpose of this utility model is achieved in that it comprises that high potential energy collecting unit, electronegative potential are got can the unit, integrated voltage regulation unit, SCR driver element, SCR Overvoltage protecting unit, SCR overtemperature and undervoltage warning unit; the high potential energy collecting unit is got and can be connected integrated voltage regulation unit respectively in the unit with electronegative potential; integrated voltage regulation unit connects SCR Overvoltage protecting unit, SCR overtemperature and undervoltage warning unit respectively, and the SCR overtemperature is connected the SCR Overvoltage protecting unit respectively with the undervoltage warning unit.
The utility model also has some technical characterictics like this:
1, described high potential energy collecting unit is made up of diode, voltage-stabiliser tube, transistor, Transient Suppression Diode and heavy-duty diode, connects with the transient state equalizer circuit and obtains direct voltage, connects integrated voltage regulation unit 2 behind the accumulation of energy electrochemical capacitor.
2, described electronegative potential is got and can the unit be isolated current transformer, rectifier bridge and amplitude limiter circuit by high pressure and forms, and high pressure isolation current transformer is got and can be supplied with integrated voltage regulation unit and SCR driver element through rectifier bridge by low-voltage, high-current.
3, described integrated voltage regulation unit from the high potential energy collecting unit or electronegative potential get and can the unit obtain direct voltage, by filter capacitor, the constant voltage of integrated regulator output.
4, described SCR driver element is made up of the optical fiber connector, high-speed power chip for driving, diode, MOSFET and resistance capacitance, optical fiber connector receiving optical signals is transformed into the signal of telecommunication and gives the high-speed power chip for driving, MOSFET is open-minded for the control of high-speed power chip for driving, has reached the purpose of control thyristor conducting.
5, described SCR Overvoltage protecting unit is made up of grading resistor, divider resistance, comparator, diode and the triode of thyristor; circuit is simple, cost is low, reaction speed is fast, can connect, disconnect, lose the overvoltage that pulse causes to AC power and play effective protection.
6, described SCR overtemperature and undervoltage warning unit are made up of overtemperature alarm circuit and undervoltage warning circuit, the overtemperature alarm circuit is made of external PTC thermistor, resistance, comparator, triode and the optical fiber connector, sends alarm signal when the thyristor temperature surpasses set point; Undervoltage warning circuit is made of voltage stabilizing didoe, resistance, triode, the optical fiber connector, sends alarm signal when operating voltage is lower than set point.
The utility model receives the gate pole triggering signal that light pulse signal is converted to thyristor, triggers thyristor; And sending working state signal to the low level circuit, the light signal of being convenient to the high-order electronic unit that optical receiving circuit will receive changes that the signal of telecommunication is given microsystem so that judge system mode into, sends failure alarm signal, notice.
Exclusive advantage of the present utility model has:
1. utilize the method for optical fiber communication, the low level start pulse signal is delivered to a high position, be coupled to gate circuit transistor gate after treatment.This mode both can overcome electromagnetic interference, can adopt triode thyristor again, reduced system cost.
2. adopt the high potential coupling to get energy method, avoided the fault that the valve that causes because of outer power supply source job insecurity, unexpected power down etc. can't operate as normal as working power.Also reduced cost than the work scheme of power supply of the isolating transformer that adopts high voltage withstand class.
3. electronegative potential is got and can be got energy duplicate supply application scheme with a high position, selects power source design according to real work and debugging applying flexible.
4. the utility model design has increased overvoltage protection, overtemperature prote function under the situation of finishing the most basic triggering task.Can say so, SCR self-powered gate pole trigger board is the triggering and protection collection multi-functional trigger board all over the body of thyristor.
(4) description of drawings
Fig. 1 gets the energy schematic diagram for coupling;
Fig. 2 gets the energy schematic diagram for low level;
Fig. 3 is integrated voltage regulation unit schematic diagram;
Fig. 4 is a SCR driver element theory diagram;
Fig. 5 is a SCR Overvoltage protecting unit schematic diagram;
Fig. 6 is SCR overtemperature and undervoltage warning unit schematic diagram;
Fig. 7 is a structure principle chart of the present utility model.
(5) embodiment
Below in conjunction with the drawings and specific embodiments the utility model is further described:
In conjunction with Fig. 1, present embodiment comprises that high potential energy collecting unit 1, electronegative potential are got can unit 2, integrated voltage regulation unit 3, SCR driver element 4, SCR Overvoltage protecting unit 5, SCR overtemperature and undervoltage warning unit 6.
The realization principle of present embodiment formant is as follows:
1. the high potential energy collecting unit 1
High-order thyristor needs working power when triggering, and adopts the isolating transformer of high voltage withstand class, not only makes difficulty and cost height.The way that we have adopted coupling to get energy.Circuit theory as shown in Figure 1, V1 is a main thyristor among the figure, R
g, C
gBe main circuit dynamic voltage balancing resistance, electric capacity, XF is an amplitude limiter circuit.When thyristor V1 is in forward blocking, electric current I
gBe forward, to capacitor C
g, C
SCharging.Work as capacitor C
STerminal voltage when surpassing amplitude limit value, the amplitude limiter circuit action, the V3 diode ends, and stops to C
SCharging.Capacitor C
STerminal voltage remain amplitude limit value, capacitor C
SEnergy storage as high-order electronic unit working power; When triggering thyristor V1, capacitor C
SGate pole discharge by V1; When thyristor V1 is in reverse blocking, I
gBe negative sense, V2 constitutes bypass branch road, capacitor C
gBe reversed charging; When thyristor V1 is in forward blocking once more, capacitor C
gHad and just gone up negative electric charge down, helped capacitor C
SCharged quickly.So move in circles.Because getting the equiva lent impedance of energy circuit is capacitive, and much smaller than the equalizer circuit impedance Z
g(R
g+ jX
g), so neither influence is all pressed, and can be coupled again and get energy.
2. electronegative potential is got the energy unit
A high position is got can have requirement to the disconnected operating voltages of thyristor two, can not satisfy power demands under the certain voltage situation and is unfavorable for the low pressure debugging being lower than.Therefore, designed low level and got the energy circuit, as Fig. 2, CT1 is that high pressure is isolated current transformer among the figure, and primary side is that low-voltage, high-current passes through mutual inductor.Secondary side induction milliampere level exchanges the rectifier bridge output direct current that constitutes through D3, D6, D10, D15, supplies with the CS energy storage capacitor through VS.The CS both end voltage is controlled by the XF amplitude limiter circuit.The design's electronegative potential is got to get be able to power simultaneously with a high position and is not disturbed mutually, and realization duplicate supply application scheme is convenient to use and debugging.
3. integrated voltage regulation unit 3
Integrated voltage regulation unit 3 from a high position get can unit 1 or low level get and can obtain 12V-20V voltages in unit 2, supply with the monoblock plank through U1 output 5V voltage and use.C13, C15 are energy storage capacitors, and C1, C2, C3, C14 are filter capacitors, and D1 is a fly-wheel diode, and U1 is integrated three disconnected pressurizers.
3.SCR driver element 4
SCR driver element 4 is that the most basic circuit of SCR self-powered gate pole trigger board also is a most important parts.As shown in Figure 4; RX1 is the optical fiber connector among the figure, accepts start pulse signal that electronegative potential sends here and changes the signal of telecommunication into and give U3, and U3 is the fast power chip for driving of Q3; Q3 is a high-power MOSFET; C1, C15 are filter capacitors, and D9 and D13 form clamped circuit protection Q3, and R25 and R24 constitute bleeder circuit; C8 and R11, R16 form the absorption circuit; the overvoltage that occurs when absorbing the Q3 switch, C12 is a shunt capacitance, light-emitting diode D2 and current-limiting resistance R15 are used to refer to operating state., optical fiber connector receiving optical signals is transformed into the signal of telecommunication and gives high-speed power chip for driving U3, and MOSFET is open-minded in high-speed power chip for driving U3 control, has reached the purpose of control thyristor conducting.
4.SCR Overvoltage protecting unit 5
SCR Overvoltage protecting unit 5 mainly is in order to prevent that the SCR applied voltage from surpassing the maximum rating that device allowed, and damages device.As shown in Figure 4, terminal J6 is connected the sampling end of SCR grading resistor, when the SCR both end voltage surpasses the maximum rating that is allowed, the voltage that resistance R 29 is assigned to is higher than comparator U2A_2 terminal voltage value makes U2A_1 output high level, the driver element start pulse signal is issued in the Q4 conducting, the damage that makes the SCR conducting avoid overvoltage to cause.Diode D7, voltage stabilizing didoe D14 restriction overvoltage damages U2A.This protective circuit is simple, cost is low, reaction speed is fast, can connect, disconnect, lose the overvoltage that pulse causes to AC power and play effective protection.
5.SCR overtemperature and undervoltage warning unit 6
This unit comprises an overtemperature alarm circuit and working power undervoltage warning circuit.As Fig. 5 institute, resistance R7 composition bleeder circuit on external PTC thermistor of J2 and the plate in the overtemperature prote square frame.Magnitude of voltage that PTC thermistor branch obtains and R4 and R10 set point relatively are output as height less than set point for normal working temperature U5B_7, the alert signal of not transmitting messages; It is low to be greater than set point that overtemperature irregular working temperature U5B_7 is output as, and Q1 is operated in cut-off region optical fiber connector TX1 and sends alarm signal.Be the under-voltage protecting circuit schematic diagram in the under-voltage protection square frame, voltage stabilizing didoe D12, Q5, Q2 form switching circuit.When the trigger board operating voltage is higher than voltage stabilizing didoe D12 voltage limiting value, the base stage input high level of Q5, the base stage input low level of Q2 is equivalent to the work that switch disconnects does not influence triode Q1 and optical fiber connector TX1; When the trigger board operating voltage is lower than voltage stabilizing didoe D12 voltage limiting value, the base stage input low level of Q5, the base stage input high level of Q2 is equivalent to switch and closes the base stage that drags down Q1, and Q1 is operated in cut-off region optical fiber connector TX1 and sends alarm signal.
Claims (7)
1, a kind of SCR self-powered gate pole trigger board; it is characterized in that it comprises that high potential energy collecting unit, electronegative potential are got can the unit, integrated voltage regulation unit, SCR driver element, SCR Overvoltage protecting unit, SCR overtemperature and undervoltage warning unit; the high potential energy collecting unit is got and can be connected integrated voltage regulation unit respectively in the unit with electronegative potential; integrated voltage regulation unit connects SCR Overvoltage protecting unit, SCR overtemperature and undervoltage warning unit respectively, and the SCR overtemperature is connected the SCR Overvoltage protecting unit respectively with the undervoltage warning unit.
2, SCR self-powered gate pole trigger board according to claim 1, it is characterized in that described high potential energy collecting unit is made up of diode, voltage-stabiliser tube, transistor, Transient Suppression Diode and heavy-duty diode, connect with the transient state equalizer circuit and to obtain direct voltage, behind the accumulation of energy electrochemical capacitor, connect integrated voltage regulation unit.
3, SCR self-powered gate pole trigger board according to claim 1, it is characterized in that described electronegative potential is got can the unit isolate current transformer, rectifier bridge and amplitude limiter circuit by high pressure and forms, and high pressure isolation current transformer is got and can be supplied with integrated voltage regulation unit and SCR driver element through rectifier bridge by low-voltage, high-current.
4, SCR self-powered gate pole trigger board according to claim 1, it is characterized in that described integrated voltage regulation unit from the high potential energy collecting unit or electronegative potential get and can the unit obtain direct voltage, by filter capacitor, the constant voltage of integrated regulator output.
5, SCR self-powered gate pole trigger board according to claim 1, it is characterized in that described SCR driver element is made up of the optical fiber connector, high-speed power chip for driving, diode, MOSFET and resistance capacitance, optical fiber connector receiving optical signals is transformed into the signal of telecommunication and gives the high-speed power chip for driving, MOSFET is open-minded for the control of high-speed power chip for driving, has reached the purpose of control thyristor conducting.
6, SCR self-powered gate pole trigger board according to claim 1; it is characterized in that described SCR Overvoltage protecting unit is made up of grading resistor, divider resistance, comparator, diode and the triode of thyristor; circuit is simple, cost is low, reaction speed is fast, can connect, disconnect, lose the overvoltage that pulse causes to AC power and play effective protection.
7, SCR self-powered gate pole trigger board according to claim 1, it is characterized in that described SCR overtemperature and undervoltage warning unit be made up of overtemperature alarm circuit and undervoltage warning circuit, the overtemperature alarm circuit is made of external PTC thermistor, resistance, comparator, triode and the optical fiber connector, sends alarm signal when the thyristor temperature surpasses set point; Undervoltage warning circuit is made of voltage stabilizing didoe, resistance, triode, the optical fiber connector, sends alarm signal when operating voltage is lower than set point.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNU2008200910971U CN201286085Y (en) | 2008-10-14 | 2008-10-14 | SCR self power supply gate triggering board |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNU2008200910971U CN201286085Y (en) | 2008-10-14 | 2008-10-14 | SCR self power supply gate triggering board |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN201286085Y true CN201286085Y (en) | 2009-08-05 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CNU2008200910971U Expired - Fee Related CN201286085Y (en) | 2008-10-14 | 2008-10-14 | SCR self power supply gate triggering board |
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|---|---|
| CN (1) | CN201286085Y (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102780204A (en) * | 2011-05-10 | 2012-11-14 | 海洋王照明科技股份有限公司 | Under-voltage protection circuit and lamp |
| CN103675439A (en) * | 2012-08-31 | 2014-03-26 | 西门子公司 | Drive device and drive method used for silicon controlled rectifier |
| CN108767815A (en) * | 2018-07-17 | 2018-11-06 | 云南电网有限责任公司红河供电局 | Electromagnetic potential transformer auto by pass harmonic elimination apparatus |
-
2008
- 2008-10-14 CN CNU2008200910971U patent/CN201286085Y/en not_active Expired - Fee Related
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102780204A (en) * | 2011-05-10 | 2012-11-14 | 海洋王照明科技股份有限公司 | Under-voltage protection circuit and lamp |
| CN103675439A (en) * | 2012-08-31 | 2014-03-26 | 西门子公司 | Drive device and drive method used for silicon controlled rectifier |
| CN103675439B (en) * | 2012-08-31 | 2017-08-04 | 西门子公司 | A kind of Drive And Its Driving Method for silicon controlled rectifier (SCR) |
| CN108767815A (en) * | 2018-07-17 | 2018-11-06 | 云南电网有限责任公司红河供电局 | Electromagnetic potential transformer auto by pass harmonic elimination apparatus |
| CN108767815B (en) * | 2018-07-17 | 2024-02-02 | 云南电网有限责任公司红河供电局 | Automatic bypass resonance elimination device of electromagnetic voltage transformer |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20090805 Termination date: 20171014 |