CN1599183A - Bridge superconducting current limitter control system based on DSP - Google Patents
Bridge superconducting current limitter control system based on DSP Download PDFInfo
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- CN1599183A CN1599183A CNA2004100203036A CN200410020303A CN1599183A CN 1599183 A CN1599183 A CN 1599183A CN A2004100203036 A CNA2004100203036 A CN A2004100203036A CN 200410020303 A CN200410020303 A CN 200410020303A CN 1599183 A CN1599183 A CN 1599183A
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
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Abstract
The invention relates to a control system of the bridge type superconducting current limiter bases on the DSP. It treats the circuit through the signal reshaping transformation to collect the electrical signals, send the signal to the power driving tube circuit after being treated by the central data processing circuit, then control the gate-controlled switch element circuit of the bridge type superconducting current limiter and reach the aim to controll the system. The advantages and the technological effects of the invention lie in the following aspects: adopting the DSP to form the control system, simple hardware circuit, highly precise real time control, increased stability and reliability of the system. Appling the DSP to the bridge type superconducting current limiter and carrying out the closed loop control to the electronic switch composed of the GTO and other parts can reduce the loss caused by the short circuit of the electric power.
Description
(1) technical field:
The invention belongs to electric power system bridge type superconductive flow restricter (SFCL) control technology field, is a kind of bridge type superconductive flow restricter control system based on DSP.
(2) background technology:
Bridge type superconductive flow restricter (claiming bridge circuit type superconducting fault current limiter again) adds the superconduct sensor by device for high-power power electronic such as GTO or IGBT usually and constitutes, its control circuit is many to be made up of single-chip microcomputer, and control device exists hardware circuit complexity, debug difficulties, poor anti jamming capability mostly and has shortcoming such as temperature drift.Because it is very high that high-power circuit requires trigger impulse, no matter traditional control device still on control rate all is difficult to satisfy the requirement of modern high-power circuit in control precision.And along with the fast development of power industry, the capacity of distribution system and scale increase day by day, and the requirement of control device is also improved constantly, and traditional control device has been difficult to satisfy the performance requirement of modern industry.
(3) summary of the invention:
The object of the present invention is to provide a kind of bridge type superconductive flow restricter control system based on DSP, it adopts high performance signal processor, can overcome the shortcoming of above-mentioned traditional control system preferably, is a kind of fast speed, high-precision control system.
Detailed technology scheme of the present invention: a kind of superconductive failure current limiter control system based on DSP is characterized in that it is made up of signal shaping conversion process circuit, central data treatment circuit, power drive pipe circuit and superconductive current limiter turn-off thyristor element circuit; The input of said signal shaping conversion process circuit connects external voltage instrument transformer summation current transformer, its output connects the input of central data treatment circuit, the output that comprises the central data treatment circuit of photoelectric isolating circuit connects power drive pipe circuit respectively, and the output of power drive pipe circuit connects each GTO gate pole input of superconductive current limiter turn-off thyristor element circuit.
Above-mentioned said signal shaping conversion process circuit is made up of AC sampling front-end circuit, multidiameter option switch and A/D change-over circuit; The AC sampling front-end circuit is sent into multidiameter option switch with voltage, the current signal gathered after handling, and sends into the central data treatment circuit again after the A/D change-over circuit is treated to digital signal.
Above-mentioned said AC sampling front-end circuit constitutes the input saturation protection with D11, D12, D21, D22, constitutes instrument transformer phase shift compensation and rc filter circuit with R24, R25, R26, R34, R35, R36, C11, C12, C16, C17; This circuit is enlarged into voltage, the current signal of gathering- 15V～+ voltage of 15V, after isolating, the one-level amplifier sends into multidiameter option switch; The selection of said multidiameter option switch sampling channel is controlled by the I/O mouth of DSP; Said A/D change-over circuit carries out conversion to the signal of variable connector output, obtains digital quantity signal, enters among the DSP through DSP exterior I/O mouth, with pending compensation data and further processing.
Above-mentioned said central data treatment circuit comprises dsp chip, power management module, crystal oscillating circuit, photoelectric isolating circuit and data/address bus drive circuit; The software control procedure of compiling set control executive condition, identification, the processing of dsp chip and the control command of being sent to data bus driving circuits input signal; Wherein power management module provides electric energy to supply with; Crystal oscillating circuit provides clock signal to dsp chip.
Above-mentioned said dsp chip comprises big capacity flash memory, a plurality of 32 bit timing devices, 2 task managers and SPI, SCI, CAN multiple interfaces; Power management module is made of dual power supply device U3 and peripheral resistance R 15, R16, C1, C2 electric capacity; Crystal oscillating circuit is made of the capacitor C 3 that clock signal is provided to dsp chip, C4 and crystal oscillator body U2.
Above-mentioned said power drive pipe circuit comprises the three-phase pulse amplifying circuit, is made of diode, resistance, triode and power tube; Power drive pipe circuit amplifies the input pulse signal through power tube, triode, offer superconductive current limiter turn-off thyristor element circuit, and superconductive current limiter is controlled; One of said three-phase pulse amplifying circuit comprises the amplifying circuit of amplification "+A1 " pulse mutually, contain diode D1, resistance, power tube U9 and triode N1, amplify the amplifying circuit of " A1 " pulse, contain diode D2, resistance, power tube U10 and triode N2, amplify the amplifying circuit of "+A2 " pulse, contain diode D3, resistance, power tube U11 and triode N3, amplify the amplifying circuit of " A2 " pulse, contain diode D4, resistance, power tube U12 and triode N4; In like manner two-phase has 12 GTO power cells in addition.
Above-mentioned said superconductive current limiter turn-off thyristor element circuit comprises: 4 GTO unit in the single phase alternating current (A.C.) loop, and three-phase amounts to 12 GTO unit; Their control impuls is from process power drive pipe circuit processing and amplifying signal later.
Operation principle of the present invention:
Its operation principle of superconductive current limiter turn-off thyristor element circuit that this case is adopted is determined by bridge circuit type superconducting flow restricter (SFCL), the main effect of superconducting coil L in bridge circuit type superconducting flow restricter (SFCL) circuit provides bias current and limiting short-circuit current, and dc bias power V provides bias current i for superconducting coil L
L, regulate its size, make i under the normal operating conditions
AL(is example mutually with A) is greater than circuit normal current i
AcPeak value; Regulate trigger angle simultaneously and make bridge circuit be similar to diode bridge, and conducting all the time.This moment, superconducting coil was in superconducting state, and impedance is very little, and whole flow restricter has on bridge circuit the little forward voltage drop, and device does not show any impedance.Under fault state, work as i
AcWhen amplitude increases to set point, at i
AcIn the positive and negative half cycle, regulate the trigger angle of relevant GTO, make superconducting coil L seal in circuit, fault current is just limited by the big inductance of superconducting coil L; Change trigger angle simultaneously and make bridge circuit work in inverter mode, will make the magnetic energy of big inductance in the superconductive current limiter feed back to electrical network, the protection relevant device.
The operation principle of the said superconductive failure current limiter control device based on DSP of this case is: signal shaping conversion process circuit is transformed to transmission line voltage transformer secondary side voltage and current sensors secondary side current than the low amplitude value alternating voltage, and becoming through multidiameter option switch and A/D converter spare that digital quantity signal is sent to DSP is in the central data treatment circuit of core.During operate as normal, the control trigger angle makes the GTO bridge circuit be similar to diode bridge work; When line failure makes electric current increase to the setting limit value; the central data treatment circuit calculates the trigger angle of flow restricter turn-off thyristor element circuit according to selected control law according to input variable; pulse is sent in time-delay; after amplifying, triggers in power drive pipe circuit relevant GTO; by the big inductance containment of superconduct sensor short circuit current; and by control trigger angle make bridge circuit be in inverter mode; satisfy the needs of relay protection of power system; relevant power equipment of protection and circuit, and help reclosing operation.
Superiority of the present invention and technique effect are: utilize the High Performance DSP digital signal processing chip to realize the control of bridge circuit formula superconductive current limiter; improve the speed and the precision of control to a great extent; the control hysteresis and the precision defective that reduce common single-chip microcomputer processing speed restriction and cause; make The whole control system have good adjusting function and reliability; strengthen the stability of electrical network; protection action in the time of can guaranteeing transmission line malfunction preferably, the probability of reduction large area blackout.Adopt the DSP forming control system, hardware circuit is simple, the output trigger impulse is safe and reliable, precision of real time control is high, stability and reliability that can bigger raising device.DSP is applied in the bridge circuit formula superconductive current limiter, the electronic switch of compositions such as GTO is carried out closed-loop control, can give full play to high-speed data computing capability and the pinpoint accuracy data-handling capacity of DSP.Add peculiar advantages such as bridge circuit formula superconductive current limiter does not have big electric current A.C.power loss, does not have core device, is suitable for automatic reclosing, the operating current value is controlled, improve the stability and the reliable type of bridge type superconductive flow restricter greatly, at utmost reduce the loss that short circuit malfunction brings, this superconductive current limiter control device has broad application prospects.
(4) description of drawings:
Accompanying drawing 1 is the unit circuit overall structure schematic diagram among the present invention's related " based on bridge type superconductive flow restricter control system of DSP ".
Accompanying drawing 2 is the signal shaping conversion process electrical block diagram among the present invention's related " based on bridge type superconductive flow restricter control system of DSP ".
Accompanying drawing 3 is the structural representation of the central data treatment circuit among the present invention's related " based on bridge type superconductive flow restricter control system of DSP ".
Accompanying drawing 4 is the structural representation of the power drive pipe circuit among the present invention's related " based on bridge type superconductive flow restricter control system of DSP ".
(wherein Fig. 5-a is a single-phase bridge superconductive current limiter schematic diagram for the single phase circuit of superconductive current limiter turn-off thyristor element circuit among the present invention's related " based on bridge type superconductive flow restricter control system of DSP " and circuit system structural representation for accompanying drawing 5; Fig. 5-b is the three-phase system schematic diagram).
(5) embodiment:
Embodiment: a kind of bridge type superconductive failure current limiter control system (see figure 1) based on DSP, it is characterized in that it is a central processing unit with the high performance DSP TMS320F2812 that Texas Instruments releases, whole device is made up of signal shaping conversion process circuit, central data treatment circuit, power drive pipe circuit and superconductive current limiter turn-off thyristor element circuit; The input of said signal shaping conversion process circuit connects external voltage instrument transformer summation current transformer, its output connects the input of central data treatment circuit, the output that comprises the central data treatment circuit of photoelectric isolating circuit connects power drive pipe circuit respectively, and the output of power drive pipe circuit connects each GTO gate pole input of superconductive current limiter turn-off thyristor element circuit.
Above-mentioned said signal shaping conversion process circuit (see figure 2) is made up of AC sampling front-end circuit, multidiameter option switch and A/D change-over circuit; The AC sampling front-end circuit is sent into multidiameter option switch with voltage, the current signal gathered after handling, and sends into the central data treatment circuit again after the A/D change-over circuit is treated to digital signal.
Above-mentioned said AC sampling front-end circuit (see figure 2) constitutes the input saturation protection with D11, D12, D21, D22, constitutes instrument transformer phase shift compensation and rc filter circuit with R24, R25, R26, R34, R35, R36, C11, C12, C16, C17; This circuit is enlarged into voltage, the current signal of gathering-15V～+ voltage of 15V, after isolating, the one-level amplifier sends into multidiameter option switch; The selection of said multidiameter option switch sampling channel is controlled by the I/O mouth of DSP; Said A/D change-over circuit carries out conversion to the signal of variable connector output, obtains digital quantity signal, enters among the DSP through DSP exterior I/O mouth, with pending compensation data and further processing; This circuit working process is: external voltage, current signal are converted to voltage signal through instrument transformer, enter multichannel selector switch AD7506 through amplitude limit, phase shift compensation, capacitance-resistance filter, amplifier buffer circuit, control selected passage by DSP, selected channel signal obtains high-precision digital signal through 16 high-speed a/d converters, enter the DSP kernel by the I/O mouth again, carry out further calculation process.
Above-mentioned said central data treatment circuit (see figure 3) comprises dsp chip, power management module, crystal oscillating circuit, photoelectric isolating circuit and data/address bus drive circuit; The software control procedure of compiling set control executive condition, identification, the processing of dsp chip and the control command of being sent to data bus driving circuits input signal; Wherein power management module provides electric energy to supply with; Crystal oscillating circuit provides clock signal to dsp chip.
Above-mentioned said dsp chip (see figure 3) comprises big capacity flash memory, a plurality of 32 bit timing devices, 2 task managers and SPI, SCI, CAN multiple interfaces; Power management module is made of dual power supply device TPS73HD301 and peripheral resistance R 15, R16, C1, C2 electric capacity; Crystal oscillating circuit is made of the capacitor C 3 that clock signal is provided to dsp chip, C4 and crystal oscillator body U2; The data/address bus drive circuit is made of two bidirectional data buffer device 74LS245; This circuit working process is: after the digital quantity that A/D is transformed gained receives DSP, to data compensate, behind the digital filtering, corresponding corresponding standard value is converted into per unit value, computing draws pilot angle, and the conversion count value, produce 4 (three-phase amount to 12) different control impuls (+A1 ,-A1 ,+A2 ,-A2).
Above-mentioned said power drive pipe circuit (see figure 4) comprises the three-phase pulse amplifying circuit, is made of diode, resistance, triode and power tube; Power drive pipe circuit amplifies the input pulse signal through power tube, triode, offer superconductive current limiter turn-off thyristor element circuit, and superconductive current limiter is controlled; One of said three-phase pulse amplifying circuit comprises the amplifying circuit of amplification "+A1 " pulse mutually, contain diode D1, resistance, power tube U9 and triode N1, amplify the amplifying circuit of " A1 " pulse, contain diode D2, resistance, power tube U10 and triode N2, amplify the amplifying circuit of "+A2 " pulse, contain diode D3, resistance, power tube U11 and triode N3, amplify the amplifying circuit of " A2 " pulse, contain diode D4, resistance, power tube U12 and triode N4; In like manner two-phase has 12 GTO power cells in addition; This circuit working process is: 4 (three-phase amounts to 12) control impuls that this power drive pipe circuit is exported DSP (+A1 ,-A1 ,+A2 ,-A2) amplify, so that trigger the GTO unit of back reliably.The effect of diode D1, D2, D3 and D4 is to prevent the pulse reverse input, avoids interference the operate as normal of dsp chip.
(see Fig. 5-a, Fig. 5-b) comprising: (see 4 GTO unit among Fig. 5-a), three-phase amounts to 12 GTO unit and (sees Fig. 5-b) above-mentioned said superconductive current limiter turn-off thyristor element circuit in the single phase alternating current (A.C.) loop; Their control impuls is from process power drive pipe circuit processing and amplifying signal later; This circuit working process is: 4 GTO unit G1, G2, G3 and G4 in the superconductive current limiter turn-off thyristor element circuit, the signal that receives from power drive pipe circuit according to certain time sequence is triggered, during operate as normal, the similar diode bridge of bridge circuit conducting; After the fault that is short-circuited, regulate the trigger angle of relevant GTO, make superconducting coil L seal in circuit, fault current is just limited by the big inductance of superconducting coil L; Change trigger angle simultaneously and make bridge circuit work in inverter mode, will make the magnetic energy of big inductance in the superconductive current limiter feed back to electrical network, the protection relevant device.
Claims (7)
1, a kind of bridge type superconductive flow restricter control system based on DSP is characterized in that it is made up of signal shaping conversion process circuit, central data treatment circuit, power drive pipe circuit and superconductive current limiter turn-off thyristor element circuit; The input of said signal shaping conversion process circuit connects external voltage instrument transformer summation current transformer, its output connects the input of central data treatment circuit, the output that comprises the central data treatment circuit of photoelectric isolating circuit connects power drive pipe circuit respectively, and the output of power drive pipe circuit connects each GTO gate pole input of superconductive current limiter turn-off thyristor element circuit.
2,, it is characterized in that said signal shaping conversion process circuit is made up of AC sampling front-end circuit, multidiameter option switch and A/D change-over circuit according to the said a kind of bridge type superconductive flow restricter control system of claim 1 based on DSP; The AC sampling front-end circuit is sent into multidiameter option switch with voltage, the current signal gathered after handling, and sends into the central data treatment circuit again after the A/D change-over circuit is treated to digital signal.
3, according to the said a kind of bridge type superconductive flow restricter control system of claim 2 based on DSP, it is characterized in that said AC sampling front-end circuit constitutes the input saturation protection with D11, D12, D21, D22, constitutes instrument transformer phase shift compensation and rc filter circuit with R24, R25, R26, R34, R35, R36, C11, C12, C16, C17; This circuit is enlarged into voltage, the current signal of gathering-15V～+ voltage of 15V, after isolating, the one-level amplifier sends into multidiameter option switch; The selection of said multidiameter option switch sampling channel is controlled by the I/O mouth of DSP; Said A/D change-over circuit carries out conversion to the signal of variable connector output, obtains digital quantity signal, enters among the DSP through DSP exterior I/O mouth, with pending compensation data and further processing.
4, according to the said a kind of bridge type superconductive flow restricter control system of claim 1, it is characterized in that said central data treatment circuit comprises dsp chip, power management module, crystal oscillating circuit, photoelectric isolating circuit and data/address bus drive circuit based on DSP; The software control procedure of compiling set control executive condition, identification, the processing of dsp chip and the control command of being sent to data bus driving circuits input signal; Wherein power management module provides electric energy to supply with; Crystal oscillating circuit provides clock signal to dsp chip.
5,, it is characterized in that said dsp chip comprises big capacity flash memory, a plurality of 32 bit timing devices, 2 task managers and SPI, SCI, CAN multiple interfaces according to the said a kind of bridge type superconductive flow restricter control system of claim 4 based on DSP; Power management module is made of dual power supply device U3 and peripheral resistance R 15, R16, C1, C2 electric capacity; Crystal oscillating circuit is made of the capacitor C 3 that clock signal is provided to dsp chip, C4 and crystal oscillator body U2.
6, according to the said a kind of bridge type superconductive flow restricter control system of claim 1, it is characterized in that said power drive pipe circuit comprises the three-phase pulse amplifying circuit, is made of diode, resistance, triode and power tube based on DSP; Power drive pipe circuit amplifies the input pulse signal through power tube, triode, offer superconductive current limiter turn-off thyristor element circuit, and superconductive current limiter is controlled; One of said three-phase pulse amplifying circuit comprises the amplifying circuit of amplification "+A1 " pulse mutually, contain diode D1, resistance, power tube U9 and triode N1, amplify the amplifying circuit of " A1 " pulse, contain diode D2, resistance, power tube U10 and triode N2, amplify the amplifying circuit of "+A2 " pulse, contain diode D3, resistance, power tube U11 and triode N3, amplify the amplifying circuit of " A2 " pulse, contain diode D4, resistance, power tube U12 and triode N4; In like manner two-phase has 12 GTO power cells in addition.
7, according to the said a kind of bridge type superconductive flow restricter control system of claim 1, it is characterized in that said superconductive current limiter turn-off thyristor element circuit comprises based on DSP: 4 GTO unit in the single phase alternating current (A.C.) loop, three-phase amounts to 12 GTO unit; Their control impuls is from process power drive pipe circuit processing and amplifying signal later.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
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| CNA2004100203036A CN1599183A (en) | 2004-08-11 | 2004-08-11 | Bridge superconducting current limitter control system based on DSP |
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| CNA2004100203036A CN1599183A (en) | 2004-08-11 | 2004-08-11 | Bridge superconducting current limitter control system based on DSP |
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| CNA2004100203036A Pending CN1599183A (en) | 2004-08-11 | 2004-08-11 | Bridge superconducting current limitter control system based on DSP |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN100427962C (en) * | 2005-12-12 | 2008-10-22 | 天津理工大学 | System for detecting fault of currect limiter with non-conduction type superconduction fault and detecting method thereof |
| CN102354963A (en) * | 2011-08-30 | 2012-02-15 | 上海电力学院 | Fast triggering system of resonant current limiter thyristor valve and working method of fast triggering system |
| CN105024368A (en) * | 2014-04-24 | 2015-11-04 | 国家电网公司 | 110kV voltage class short-circuit current-limiting device detonation device and system |
-
2004
- 2004-08-11 CN CNA2004100203036A patent/CN1599183A/en active Pending
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN100427962C (en) * | 2005-12-12 | 2008-10-22 | 天津理工大学 | System for detecting fault of currect limiter with non-conduction type superconduction fault and detecting method thereof |
| CN102354963A (en) * | 2011-08-30 | 2012-02-15 | 上海电力学院 | Fast triggering system of resonant current limiter thyristor valve and working method of fast triggering system |
| CN102354963B (en) * | 2011-08-30 | 2014-09-17 | 上海电力学院 | Fast triggering system of resonant current limiter thyristor valve and working method of fast triggering system |
| CN105024368A (en) * | 2014-04-24 | 2015-11-04 | 国家电网公司 | 110kV voltage class short-circuit current-limiting device detonation device and system |
| CN105024368B (en) * | 2014-04-24 | 2018-11-20 | 国家电网公司 | A kind of priming device and system of the fault current limiter of 110 kilovoltage grade |
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