CN2932793Y - Superconductor quench fault current limiter fault detecting device - Google Patents
Superconductor quench fault current limiter fault detecting device Download PDFInfo
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- CN2932793Y CN2932793Y CNU2005201239213U CN200520123921U CN2932793Y CN 2932793 Y CN2932793 Y CN 2932793Y CN U2005201239213 U CNU2005201239213 U CN U2005201239213U CN 200520123921 U CN200520123921 U CN 200520123921U CN 2932793 Y CN2932793 Y CN 2932793Y
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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
- Y02E40/60—Superconducting electric elements or equipment; Power systems integrating superconducting elements or equipment
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Abstract
A fault detection device of quenching type superconducting fault current limiter, characterized in that the fault detection device comprises a rectification module, a logic circuit module, an A/D transform module and a superconducting controlling switch module. The utility model has the advantages of that: 1. the hardware device and computer software programming are integrated, the design of the hardware device is simple, and the software programming is easy to understand. 2. The di/dt fault current change rate is used to control the action of the superconducting fault current limiter, which prevents the false operation of the conventional control method. 3. The A/D transform module is matched with the logic circuit to increase the accuracy and the reliability of the operation of the superconducting fault current limiter. 4. The reliability of the control system is greatly increased using the high-speed data calculation and data processing capacity of the computer.
Description
(1) technical field:
The utility model belongs to electric power system quench type superconductivity fault current-limiting device control detection technical field, and particularly a kind of superconductive failure current limiter that integrates hardware technology and software programming triggers control device.
(2) background technology:
Along with the continuous expansion of electric power system scale, when line failure, can current-limiting apparatus move quickly and effectively becomes one of hot technology of stakeholder's concern.The trigger current of superconductive failure current limiter (Triggle Level), it is the peak value of superconductor critical current, when short-circuit impact electric current during greater than trigger current, superconductor changes normal state into limiting short-circuit current by superconducting state, make confined short-circuit impact electric current be no more than the instantaneous connecting-disconnecting function of circuit breaker, like this, can select " light-duty " circuit breaker for use.In engineering, the amplitude of trigger current should be in conjunction with the S/N critical current of superconducting coil, the instantaneous peak value of fault current and the difference of circuit breaker maximum current connecting-disconnecting function.Under the prerequisite that leaves the desire degree, determine through the principle of repetition test (trial-and-error).
But the triggering mode of superconductive failure current limiter (SFCL) causes mistake to be done if only rely on peak current easily.Because fault current can have identical peak value, different effective values.Have under the precondition of identical peak value, the effective value of unsymmetrical short-circuit electric current is less than the effective value of symmetrical short-circuit electric current.Often trigger SFCL in the engineering reality in conjunction with di/dt.Di/dt is a fault electric current rate over time, it and the acting in conjunction of current amplitude triggering mode control superconductive failure current limiter by superconducting state to the normal state transforming process.The misoperation of avoiding only triggering SFCL and causing by current amplitude.So the weak point of improving conventional art has become most important with stability and the reliability that improves the required trigger condition of fault current limiter.
(3) summary of the invention:
The purpose of this utility model is to provide a kind of quench type superconductivity fault current-limiting device failure detector, it adopts high performance signal processor and flexible control technique to obtain high-precision control effect, the stability and the reliability of quench type superconductivity fault current-limiting device have been improved greatly, and, guaranteed the stable operation of relevant power equipment, circuit from having reduced the loss that short circuit malfunction brings to the full extent.
The technical solution of the utility model: a kind of quench type superconductivity fault current-limiting device failure detector, it is characterized in that it is made of rectification module, application of logic circuit module, A/D modular converter, superconduction control switch module, the input of said rectification module is connected with external power grid by current transformer, its output connects application of logic circuit module and A/D modular converter, application of logic circuit module is connected with superconduction control switch module, the action of the output control superconductive failure current limiter of superconduction control switch module.
Above-mentioned said rectification module is made up of uncontrollable rectification circuit or controlled rectification circuit, wherein uncontrollable rectification circuit is made up of diode bridge, and controlled rectification circuit is taken by the device for high-power power electronic of turn-off thyristor or insulated gate bipolar thyristor class and constituted bridge circuit.
Above-mentioned said A/D modular converter adopts chip TLV1544, and the digital quantity of its generation is handled through DSP, and the quench of superconductive failure current limiter is controlled; Its inner switching capacity successive approximation that adopts obtains the analog-to-digital conversion result, and chip has 4 tunnel analog signal input channels, is provided with by the chip internal parameter and selects different passage inputs, carries out A/D conversion output.
Above-mentioned said application of logic circuit module, superconduction control switch module adopt conventional modular circuit combination.
The said quench type superconductivity fault current-limiting device process fault detection of the utility model is: (1) current transformer is gathered the current signal amount from electrical network; (2) the current signal amount obtains a unidirectional current signal through full-wave rectification, gives analog-to-digital conversion module, current changing rate detection module, superconduction control switch module for power supply; (3) analog-to-digital conversion module converts the analog quantity that collects to digital quantity, and its output signal is by the delay circuit module, with the output of current changing rate module through or door link to each other and control the action of superconduction control switch; (4) trigger the action that logic state that logical circuit and current amplitude trigger logical circuit is determined superconductive failure current limiter, restriction short-circuit current according to current changing rate.
The analog-to-digital conversion that detects in the step (3) will realize that its software flow is as follows by software: 1. start the analog-to-digital conversion signal; 2. in the AUTO_SEQ_SR register, adorn initial value; 3. carry out analog-to-digital conversion, revolution changes once, and the value in the AUTO_SEQ_SR register just subtracts 1 automatically; 4. transformation result is saved in the relevant register; 5. judge whether conversion is finished; If finish, just EOC is interrupted in application; Otherwise just continue conversion.
Above-mentioned said computer software is formed initialization and the inner parameter setting of TLV1544 chip and the reception of transformation result that is mainly concerned with the DSP serial port, serial port be initialized as configuration to the control register of McBSPO, make DSP that control signals such as sheet choosing, clock, frame synchronizing signal can be provided for TLV1544, inside from BDXO serial transmission TLV1544 is provided with parameter simultaneously, and the data after the BDRO serial received conversion, finish once complete A/D transfer process; After system powered on, the XF pin of DSP was exported high level, was about to the CS position high level of TLV1544, and conversion chip is in unactivated state, and closes all interruptions; Behind the initialization McBSP, open and receive and external interrupt XF pin output low level, i.e. the CS position low level of TLV1544, conversion chip is started working, send conversion speed and select and the channel selecting parameter, chip begins mould/number to be changeed, and program enters wait state, EOC is uprised by low during EOC, enter the external interrupt handling procedure, receive the digital signal of conversion output, deposit corresponding data space in to treat further processing; Whole programs can be used the integrating and developing platform CodeComposer Studio of TI company, and promptly CCS adopts the C Programming with Pascal Language to finish.
In addition, control to application of logic circuit module, also can realize by software, because logical variable mainly is that step-by-step is operated, by bit variable reset or set comes the shutoff of control switch amount or open-minded, therefore can operate the position of address area in the sheet and some special function register with single-chip microcomputer; In the hardware configuration of 80C51 series monolithic, individual bit processor (boolean processor) is arranged, it has the instruction set that a cover is handled bit variable, comprises instructions such as bit variable transmission, logical operation, control computing, control program transfer; The realization of this program can realize that program is simple by assembler language, and it is little to take memory space, and the speed of service is fast.This program can be finished under KeilC51 μ vision 2 integrating and developing platforms.
Operation principle of the present utility model: current transformer (CT) is from electrical network power taking stream semaphore, by one of full-wave rectification (Full-WaveRecifier) output and the directly proportional unidirectional current signal of power network current numerical value, supply with logical circuit power, the superconduction control switch for control SFCL action provides power supply simultaneously.The current signal of current transformer output, simultaneously as di/dt transducer and two logical blocks of current amplitude sampling-maintenance, wherein the collection of current amplitude sample-hold circuit is analog quantity, be converted into digital signal by the A/D conversion, and by microsecond delay circuit and di/dt signal by or link to each other, control the action of SFCL.Di/dt triggers logical circuit and current amplitude triggering logical circuit has four kinds of logic states, is in normal operating conditions if the di/dt of electric current and amplitude logical value are respectively (1,1) expression electrical network, and SFCL is in superconducting state; Other three kind [(0,1), (1,0), (0, when 0)] representing that respectively electrical network is short-circuited fault, the fault current amplitude is out-of-limit, fault current rate of change di/dt is out-of-limit or fault current amplitude and all out-of-limit situation of fault current rate of change di/dt, and under above-mentioned three kinds of situations, logic control circuit just has the input signal of " 0 " conduct or door, then the output action signal is " 0 ", makes the SFCL correct operation.
Superiority of the present utility model and technique effect are: 1. hardware unit combines with computer software programming, the hardware unit simplicity of design, and software programming is easy-to-understand; 2. adopt di/dt fault current rate of change to control the action of superconductive failure current limiter, avoided its misoperation under traditional control method; 3. cooperate with logical circuit by the A/D analog-to-digital conversion module, make the action of superconductive failure current limiter more accurately reliable; 4. utilize computer data computation and data-handling capacity at a high speed, improved the reliability of this control system greatly.
(4) description of drawings:
Accompanying drawing 1 is the general structure schematic diagram in the utility model related " quench type superconductivity fault current-limiting device failure detector ".
Accompanying drawing 2 is the part-structure schematic diagram in the utility model related " rectification module ".
Accompanying drawing 3 is the part-structure schematic diagram in the utility model related " A/D analog-to-digital conversion ".
Accompanying drawing 4 is the software realization flow figure in the utility model related " quench type superconductivity fault current-limiting device failure detector ".
(5) embodiment:
Embodiment: a kind of quench type superconductivity fault current-limiting device failure detector (see figure 1) is characterized in that it is made up of hardware device and computer software.Wherein hardware device is made of rectification module, application of logic circuit module, A/D modular converter, superconduction control switch module, the input of said rectification module is connected with external power grid by current transformer, its output connects application of logic circuit module and A/D modular converter, application of logic circuit module is connected with superconduction control switch module, the action of the output control superconductive failure current limiter of superconduction control switch module.
Above-mentioned said rectification module (see figure 2) is made up of uncontrollable rectification circuit or controlled rectification circuit, wherein uncontrollable rectification circuit is made up of diode bridge, and controlled rectification circuit is taken by the device for high-power power electronic of turn-off thyristor or insulated gate bipolar thyristor class and constituted bridge circuit.
A/D (mould/number) the conversion chip TLV1544 that above-mentioned said A/D modular converter (see figure 3) intends adopting TI company handles the digital quantity of its generation through DSP, to reach the accurate and reliable quench control of superconductive failure current limiter.This chip is the CMOS type 10b modulus conversion chip that TI company produces, and its inner switching capacity successive approximation that adopts obtains the analog-to-digital conversion result.Chip has 4 tunnel analog signal input channels, is provided with by the chip internal parameter and selects different passage inputs, carries out A/D conversion output.
Above-mentioned said application of logic circuit module, superconduction control switch module adopt conventional modular circuit combination.
Above-mentioned said computer software is formed initialization and the inner parameter setting of TLV1544 chip and the reception of transformation result that is mainly concerned with the DSP serial port, serial port be initialized as configuration to the control register of McBSPO, make DSP that control signals such as sheet choosing, clock, frame synchronizing signal can be provided for TLV1544, inside from BDXO serial transmission TLV1544 is provided with parameter simultaneously, and the data after the BDRO serial received conversion, finish once complete A/D transfer process (see figure 4); After system powered on, the XF pin of DSP was exported high level, was about to the CS position high level of TLV1544, and conversion chip is in unactivated state, and closes all interruptions.Behind the initialization McBSP, open and receive and external interrupt, XF pin output low level, i.e. the CS position low level of TLV1544, conversion chip is started working; Send conversion speed and select and the channel selecting parameter, chip begins mould/number to be changeed; Program enters wait state, and EOC is uprised by low during EOC, enters the external interrupt handling procedure, receives the digital signal of conversion output, deposits corresponding data space in to treat further processing; Whole programs can be used the integrating and developing platform CodeComposer Studio of TI company, and promptly CCS adopts the C Programming with Pascal Language to finish.
In addition, to the control of application of logic circuit module, also can realize by software.Because logical variable mainly is that step-by-step is operated, by bit variable reset or set comes the shutoff of control switch amount or open-minded, therefore can operate the position of address area in the sheet and some special function register with single-chip microcomputer.In the hardware configuration of 80C51 series monolithic, individual bit processor (boolean processor) is arranged, it has the instruction set that a cover is handled bit variable, comprises instructions such as bit variable transmission, logical operation, control computing, control program transfer.The realization of this program can realize that program is simple by assembler language, and it is little to take memory space, and the speed of service is fast.This program can be finished under KeilC51 μ vision 2 integrating and developing platforms.
Claims (4)
1, a kind of quench type superconductivity fault current-limiting device failure detector, it is characterized in that it is made of rectification module, application of logic circuit module, A/D modular converter, superconduction control switch module, the input of said rectification module is connected with external power grid by current transformer, its output connects application of logic circuit module and A/D modular converter, application of logic circuit module is connected with superconduction control switch module, the action of the output control superconductive failure current limiter of superconduction control switch module.
2,, it is characterized in that this system hardware equipment relates generally to rectification module, application of logic circuit module, A/D modular converter, superconduction control switch module four parts according to the said a kind of quench type superconductivity fault current-limiting device failure detector of claim 1.
3, according to the said a kind of quench type superconductivity fault current-limiting device failure detector of claim 2, it is characterized in that rectification module is made up of uncontrollable rectification circuit or controlled rectification circuit, wherein uncontrollable rectification circuit is made up of diode bridge, and controlled rectification circuit is taken by the device for high-power power electronic of turn-off thyristor or insulated gate bipolar thyristor class and constituted bridge circuit.
4, according to the said a kind of quench type superconductivity fault current-limiting device failure detector of claim 2, it is characterized in that the A/D modular converter adopts chip TLV1544, the digital quantity of its generation is handled through DSP, and the quench of superconductive failure current limiter is controlled; Its inner switching capacity successive approximation that adopts obtains the analog-to-digital conversion result, and chip has 4 tunnel analog signal input channels, is provided with by the chip internal parameter and selects different passage inputs, carries out A/D conversion output.
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| Application Number | Priority Date | Filing Date | Title |
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| CNU2005201239213U CN2932793Y (en) | 2005-12-12 | 2005-12-12 | Superconductor quench fault current limiter fault detecting device |
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| CNU2005201239213U CN2932793Y (en) | 2005-12-12 | 2005-12-12 | Superconductor quench fault current limiter fault detecting device |
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| CN2932793Y true CN2932793Y (en) | 2007-08-08 |
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| CNU2005201239213U Expired - Fee Related CN2932793Y (en) | 2005-12-12 | 2005-12-12 | Superconductor quench fault current limiter fault detecting device |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN116774103A (en) * | 2023-08-24 | 2023-09-19 | 国网信息通信产业集团有限公司 | Direct current power grid fault detection method and detection terminal |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN116774103A (en) * | 2023-08-24 | 2023-09-19 | 国网信息通信产业集团有限公司 | Direct current power grid fault detection method and detection terminal |
| CN116774103B (en) * | 2023-08-24 | 2024-01-09 | 国网信息通信产业集团有限公司 | Direct current power grid fault detection method and detection terminal |
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| CF01 | Termination of patent right due to non-payment of annual fee |