CN203135418U - Digital line protection, monitoring and control apparatus - Google Patents

Digital line protection, monitoring and control apparatus Download PDF

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Publication number
CN203135418U
CN203135418U CN2012206944662U CN201220694466U CN203135418U CN 203135418 U CN203135418 U CN 203135418U CN 2012206944662 U CN2012206944662 U CN 2012206944662U CN 201220694466 U CN201220694466 U CN 201220694466U CN 203135418 U CN203135418 U CN 203135418U
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China
Prior art keywords
circuit
dsp
current
voltage
loop
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Expired - Fee Related
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CN2012206944662U
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Chinese (zh)
Inventor
刘荣堂
蔡勇
李鹏
戴礼智
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ANRI ELECTRIC Co Ltd
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ANRI ELECTRIC Co Ltd
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Priority to CN2012206944662U priority Critical patent/CN203135418U/en
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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
    • Y02B—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO BUILDINGS, e.g. HOUSING, HOUSE APPLIANCES OR RELATED END-USER APPLICATIONS
    • Y02B90/00—Enabling technologies or technologies with a potential or indirect contribution to GHG emissions mitigation
    • Y02B90/20—Smart grids as enabling technology in buildings sector
    • 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
    • Y04—INFORMATION OR COMMUNICATION TECHNOLOGIES HAVING AN IMPACT ON OTHER TECHNOLOGY AREAS
    • Y04S—SYSTEMS INTEGRATING TECHNOLOGIES RELATED TO POWER NETWORK OPERATION, COMMUNICATION OR INFORMATION TECHNOLOGIES FOR IMPROVING THE ELECTRICAL POWER GENERATION, TRANSMISSION, DISTRIBUTION, MANAGEMENT OR USAGE, i.e. SMART GRIDS
    • Y04S40/00—Systems for electrical power generation, transmission, distribution or end-user application management characterised by the use of communication or information technologies, or communication or information technology specific aspects supporting them
    • Y04S40/12—Systems for electrical power generation, transmission, distribution or end-user application management characterised by the use of communication or information technologies, or communication or information technology specific aspects supporting them characterised by data transport means between the monitoring, controlling or managing units and monitored, controlled or operated electrical equipment
    • Y04S40/124—Systems for electrical power generation, transmission, distribution or end-user application management characterised by the use of communication or information technologies, or communication or information technology specific aspects supporting them characterised by data transport means between the monitoring, controlling or managing units and monitored, controlled or operated electrical equipment using wired telecommunication networks or data transmission busses

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  • Remote Monitoring And Control Of Power-Distribution Networks (AREA)

Abstract

The utility model discloses a digital line protection, monitoring and control apparatus which comprises one set of voltage transformer sampling loop and two sets of current transformer sampling loops. The one set of voltage transformer sampling loop and two sets of current transformer sampling loops respectively access to an AD sampling circuit, and the signal output ends of the three AD sampling circuits access to DSP, which is connected with an input logic control circuit and an output logic control circuit. The signal input end of the input logic control circuit accesses to a DC input loop and an AC input loop, and the signal output end of the output logic control circuit accesses to an action outlet loop and a warning outlet loop. The DSP is connected to a single-chip microcomputer through a communication bus, and the single-chip microcomputer is connected with an ethernet processing circuit. The DSP is externally connected to an LCD liquid crystal display interface, an acoustic alarm output, a keyboard and the interface thereof. The digital line protection, monitoring and control apparatus employs a double-CPU operation mode, ensures non-interference independent logic processing, realizes TCP/UDP fast Ethernet communication, and supports AC input and DC input sampling modes simultaneously.

Description

Digital route protection measure and control device
Technical field:
The utility model relates to the microcomputer protecting device field, particularly a kind of digital microcomputer protecting controller for defeated feeder line, bus protection.
Background technology:
Power plant's major part is in the power resource location in the electric power system, as hydraulic power plant at the hydropower resources point, namely concentrate on the big place of the river basin height of water, the thermal power plant mostly concentrates on the place of production of coal, oil and other energy, big power load center then focuses mostly in industrial area and big city, thereby power plant and load center wide apart often, just the problem of power delivery appears, need carry out the conveying of electric energy with transmission line.Transmission line is in running, comparatively common faults has broken string, fall bar, insulation breakdown, flashover, foreign matter takes that to drop on lead first-class, in case short trouble appears in transmission line, the impedance of circuit was much smaller when the impedance ratio of circuit normally moved, so the short-circuit current ratio normal current is generally wanted big tens times even hundred times, voltage meeting rapid drawdown during short circuit, have a strong impact on the normal operation of electric equipment, serious line short can influence the stability of power system operation, the generating set of paired running is lost synchronously, cause system break-down, cause regionality to have a power failure on a large scale, electric power system is produced harm greatly.
The utility model content:
The short trouble that may occur at transmission line, and the ruuning situation of monitoring circuit in real time, the utility model provides a kind of digital route protection measure and control device.
The technical solution adopted in the utility model is:
A kind of digital route protection measure and control device, it is characterized in that: include one group of voltage transformer sampling circuit, two groups of current transformer sampling circuits, one group of voltage transformer sampling circuit and two groups of current transformer sampling circuits insert an AD sample circuit respectively, the signal output part of three AD sample circuits inserts DSP, DSP is connected with the input logic control circuit, the output logic control circuit, the signal input part of input logic control circuit is connected to direct current and opens entry loop, entry loop is opened in interchange, the signal output part of output logic control circuit is connected to the action outlet loop, the alarm outlet loop, DSP is connected with single-chip microcomputer by communication bus, single-chip microcomputer is connected with the Ethernet treatment circuit, and DSP also is circumscribed with LCD liquid crystal display interface, audible alarm output, keyboard and interface thereof; The secondary voltage of one group of PT is linked into described voltage transformer sampling circuit, one group of protection CT and one group of secondary current of measuring CT are linked into described current transformer sampling circuit, voltage transformer sampling circuit, current transformer sampling circuit convert the voltage and current signal to small-signal current respectively, be adjusted into digital signal through the AD sample circuit and be linked into DSP, DSP carries out the quick computing of FFT, the effective value of real-time calculating voltage, protective current and measurement electric current, and in 1/4 cycle, calculate jump-value of current; Circuit breaker position, handcart work test position, ground connection cutter position etc. are opened and are linked into into signal that direct current is opened entry loop or entry loop is opened in interchange, and after the input logic control circuit carries out step-down, removal of ac, change stable direct current 5V voltage small-signal into, be linked into DSP, DSP detects in real time and opens into sampled value; DSP protects logic to judge by calculating the electric current, the magnitude of voltage that obtain, realize defencive functions such as the alternate overcurrent of syllogic, the acceleration of alternate combined floodgate, alternate charging, overvoltage, low-voltage, reclosing, and by the open tripping operation outlet of action outlet loop, show fault message and electric current, voltage measuring value simultaneously at LCD liquid crystal display interface, and by alarm outlet loop driving buzzer, send alarm sound; DSP utilizes the communicating interrupt service routine, detects the communication data transmitting-receiving, and to carry out real time data mutual with single-chip microcomputer, and single-chip microcomputer is realized reception and the transmission of TCP/UDP message by the Ethernet treatment circuit.
Described a kind of digital route protection measure and control device is characterized in that: adopt inserter structure, by liquid crystal panel, host CPU/bus control board, current-voltage sampling plate, input and output control board, ethernet communication plate totally 5 circuit boards constitute; Liquid crystal panel comprises LCD liquid crystal display interface, keyboard and interface thereof and audible alarm output; Host CPU/bus control board comprises dsp chip, AD sample circuit, input and output logic control circuit and bottom layer driving circuit; The current-voltage sampling plate comprises 1 group of voltage transformer sampling circuit and 2 groups of current transformer sampling circuits and 1 device power module; The input and output control board comprises action outlet loop, alarm outlet loop, exchanges to open into circuit, direct current and open into circuit and relay operation loop; The ethernet communication plate mainly comprises singlechip chip and Ethernet treatment circuit.
Described a kind of digital route protection measure and control device; it is characterized in that: the two CPU operational modes of sampling; host CPU adopts 32 bit DSP chips; sub-CPU adopts 16 single-chip microcomputers, and sub-CPU is connected by the CAN bus with host CPU, the ethernet communication of implement device; support the TCP/UDP network schemer; support the serial port protocol message to be carried on the TCP/UDP transport layer, carry out the Ethernet telecommunication with the power communication monitoring unit, upload the protection action, report to the police, information such as unusual and current-voltage measurement value.
The beneficial effects of the utility model are:
1, apparatus structure is simple, and the integrated level height is gathered current and voltage data by external 12 AD chips, the sampling precision height, and the range of linearity is wide, and response speed is fast, and adaptive capacity to environment is strong and cost performance is high.
2, adopt two CPU operational modes, each takes charge of its duty, guarantees independently to carry out logical process, does not disturb mutually, and is simple efficient, and realizes the communication of TCP/UDP 100 m ethernet.
3, support interchange to open into opening into two kinds of sample modes with direct current simultaneously, support two kinds of operation circuits of AC and DC, use more extensive.
Description of drawings:
Fig. 1 is schematic block circuit diagram of the present utility model.
Fig. 2 is general structure schematic diagram of the present utility model.
The drawing reference numeral explanation:
310-host CPU/bus control board; 311-liquid crystal panel; 312-current-voltage sampling plate; 313-input and output control board; 314-ethernet communication plate;
610-dsp chip; 611-keyboard and interface thereof; The output of 612-audible alarm; 613-output logic control circuit; 614-warning outlet loop; 615-action outlet loop; 616-direct current is opened entry loop; 617-exchange and open entry loop; 618-voltage transformer circuit; 619-current transformer loop; 620-singlechip chip; 621-AD sample circuit; 622-multiple power source module; 623-LCD liquid crystal display interface; 624-Ethernet control circuit; 625-input logic control circuit.
Embodiment:
Consult shown in Figure 1, a kind of digital route protection measure and control device, include one group of voltage transformer sampling circuit 618, two groups of current transformer sampling circuits 619, one group of voltage transformer sampling circuit 618 and two groups of current transformer sampling circuits 619 insert an AD sample circuit respectively, the signal output part of three AD sample circuits 621 inserts DSP 610, DSP 610 is connected with input logic control circuit 625, output logic control circuit 613, the signal input part of input logic control circuit 625 is connected to direct current and opens entry loop 616, entry loop 617 is opened in interchange, the signal output part of output logic control circuit 613 is connected to action outlet loop 615, alarm outlet loop 614, DSP 610 is connected with single-chip microcomputer 620 by communication bus, single-chip microcomputer 620 is connected with Ethernet treatment circuit 624, and DSP 610 also is circumscribed with LCD liquid crystal display interface 623, audible alarm output 612, keyboard and interface 611 thereof; The secondary voltage of one group of PT is linked into voltage transformer sampling circuit 618, the secondary current of two groups of CT is linked into the sampling circuit 619 of current transformer, 618 and 619 sampling circuits convert voltage signal to small-signal current, be adjusted into digital signal and be linked into DSP 610 through AD sample circuit 621, DSP 610 gathers 32 data points in a cycle, carry out the FFT computing, utilize the all-wave fourier algorithm, the elimination high order harmonic component, extract fundametal compoment, calculate current/voltage effective value and jump-value of current in real time.Circuit breaker position, handcart work test position, ground connection cutter position etc. are opened and are linked into direct current into signal and open entry loop 616 or exchange and open entry loop 617, and through input logic control circuit 625, after carrying out step-down, removal of ac, change stable direct current 5V voltage small-signal into, be linked into DSP 610, DSP 610 utilizes the 1ms timer to interrupt, and detects in real time and opens into sampled value.DSP610 protects logic to judge by calculating the electric current, the magnitude of voltage that obtain; realize defencive functions such as the alternate overcurrent of syllogic, the acceleration of alternate combined floodgate, alternate charging, overvoltage, low-voltage, reclosing; and by the 615 open tripping operation outlets of action outlet loop; simultaneously 623 show fault messages and electric current, voltage measuring value at LCD liquid crystal display interface; and by warning outlet loop 614 driving buzzers, send alarm sound.DSP 610 utilizes the communicating interrupt service routine, detects the communication data transmitting-receiving, and to carry out real time data mutual with single-chip microcomputer 620, and single-chip microcomputer 620 is realized reception and the transmission of TCP/UDP message by Ethernet treatment circuit 624.
Core DSP 610 of the present utility model is 32 process chip, has abundant IO resource, have 5 timers and interrupt, 3 communicating interrupt have powerful logical process ability, fast operation, low in energy consumption, driven by 5V voltage, possess the dog of opening the door processing logic, can in time when fault, reset the safeguards system security of operation certainly.Peripheral AD sample circuit adopts 12 modulus conversion chip, and ripple 32 points of sampling guarantee that sampled data has very high precision weekly.Keyboard and interface circuit 611 thereof are used for human-machine operation, and totally 8 buttons have good operability, and DSP610 receives and presses key input signal, operations such as execution parameter setting, fixed value adjusting, report inquiry, accident inquiry, sampling inquiry; LCD liquid crystal display interface 623 sampling 12864 dot matrix screen, full Chinese shows, driving voltage 3.3V is low in energy consumption, but visual display unit parameter information, current/voltage instantaneous value, warning information, action message, operating state etc. are visual and understandable.DC/AC 220V power module 622 can be directly changed into the power-frequency voltage of 85-265V the DC power supply of isolation, for whole system provides working power.Directly (friendship) stream is opened into control circuit 622 and is not only supported direct current to insert sampling, also supports to exchange and inserts sampling, makes that the range of application of this device is more wide.
Consult shown in Figure 2ly, the utility model is inserter structure, by liquid crystal panel 311, host CPU/bus control board 310, current-voltage sampling plate 312, input and output control board 313, ethernet communication plate 314 totally 5 circuit boards constitute.Liquid crystal panel 311 comprises LCD liquid crystal display interface 623, and keyboard and interface 611 thereof and audible alarm output 612 are mainly used in man-machine interaction, and simple, intuitive is understandable to be its principal character; Host CPU/bus control board 310 comprises dsp chip 610, AD sample circuit 621, input and output logic control circuit 625 and 613 and the bottom layer driving circuit, circuit board adopts 4 layers of design, anti-interference strong, be the key process unit of whole device, be responsible for the processing of various logic criterion; Current-voltage sampling plate 312 comprises 1 group of voltage transformer circuit 618,2 groups of current transformer loops 619 and installs power module 622, is responsible for 1 group of PT voltage and 2 groups of CT current samples accesses, and the working power of generator; Input and output control board 313 comprises alarm outlet loop 614, action outlet loop 615, alternating current-direct current are opened into control circuit 616 and 617, and in conjunction with input and output logic control circuit 613 and 625, the sampling of being responsible for position signalling inserts and the switch control of action outlet; Ethernet communication plate 314 comprises singlechip chip 620 and Ethernet treatment circuit 624, realizes Ethernet TCP/UDP network communication function.
The utility model is simple in structure; the integrated level height; the sampling precision height; the range of linearity is wide, response speed is fast, and adaptive capacity to environment is strong, low in energy consumption, simple to operate, supports simultaneously to exchange and opens into opening into two kinds of sample modes with direct current; union kinds of protect function is in one; the electrical power trans mission/distribution system that can be widely used in 35KV and following voltage has remarkable economic efficiency and social benefit, has been successfully applied in a plurality of projects at present.

Claims (3)

1. digital route protection measure and control device, it is characterized in that: include one group of voltage transformer sampling circuit, two groups of current transformer sampling circuits, one group of voltage transformer sampling circuit and two groups of current transformer sampling circuits insert an AD sample circuit respectively, the signal output part of three AD sample circuits inserts DSP, DSP is connected with the input logic control circuit, the output logic control circuit, the signal input part of input logic control circuit is connected to direct current and opens entry loop, entry loop is opened in interchange, the signal output part of output logic control circuit is connected to the action outlet loop, the alarm outlet loop, DSP is connected with single-chip microcomputer by communication bus, single-chip microcomputer is connected with the Ethernet treatment circuit, and DSP also is circumscribed with LCD liquid crystal display interface, audible alarm output, keyboard and interface thereof; The secondary voltage of one group of PT is linked into described voltage transformer sampling circuit, one group of protection CT and one group of secondary current of measuring CT are linked into described current transformer sampling circuit, voltage transformer sampling circuit, current transformer sampling circuit convert the voltage and current signal to small-signal current respectively, be adjusted into digital signal through the AD sample circuit and be linked into DSP, DSP carries out the quick computing of FFT, the effective value of real-time calculating voltage, protective current and measurement electric current, and in 1/4 cycle, calculate jump-value of current; Circuit breaker position, handcart work test position, ground connection cutter position are opened and are linked into into signal that direct current is opened entry loop or entry loop is opened in interchange, and after the input logic control circuit carries out step-down, removal of ac, change stable direct current 5V voltage small-signal into, be linked into DSP, DSP detects in real time and opens into sampled value; DSP protects logic to judge by calculating the electric current, the magnitude of voltage that obtain, realize the alternate overcurrent of syllogic, the acceleration of alternate combined floodgate, alternate charging, overvoltage, low-voltage, reclosing defencive function, and by the open tripping operation outlet of action outlet loop, show fault message and electric current, voltage measuring value simultaneously at LCD liquid crystal display interface, and by alarm outlet loop driving buzzer, send alarm sound; DSP utilizes the communicating interrupt service routine, detects the communication data transmitting-receiving, and to carry out real time data mutual with single-chip microcomputer, and single-chip microcomputer is realized reception and the transmission of TCP/UDP message by the Ethernet treatment circuit.
2. a kind of digital route protection measure and control device according to claim 1, it is characterized in that: adopt inserter structure, by liquid crystal panel, host CPU/bus control board, current-voltage sampling plate, input and output control board, ethernet communication plate totally 5 circuit boards constitute; Liquid crystal panel comprises LCD liquid crystal display interface, keyboard and interface thereof and audible alarm output; Host CPU/bus control board comprises dsp chip, AD sample circuit, input and output logic control circuit and bottom layer driving circuit; The current-voltage sampling plate comprises 1 group of voltage transformer sampling circuit and 2 groups of current transformer sampling circuits and 1 device power module; The input and output control board comprises action outlet loop, alarm outlet loop, exchanges to open into circuit, direct current and open into circuit and relay operation loop; The ethernet communication plate mainly comprises singlechip chip and Ethernet treatment circuit.
3. a kind of digital route protection measure and control device according to claim 1; it is characterized in that: the two CPU operational modes of sampling; host CPU adopts 32 bit DSP chips; sub-CPU adopts 16 single-chip microcomputers; sub-CPU is connected by the CAN bus with host CPU; the ethernet communication of implement device; support the TCP/UDP network schemer; support the serial port protocol message to be carried on the TCP/UDP transport layer; carry out the Ethernet telecommunication with the power communication monitoring unit, upload protection action, warning, unusual and current-voltage measurement value information.
CN2012206944662U 2012-12-14 2012-12-14 Digital line protection, monitoring and control apparatus Expired - Fee Related CN203135418U (en)

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Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN103022986A (en) * 2012-12-14 2013-04-03 滁州安瑞电力自动化有限公司 Digital line protection measuring and control device
CN107121619A (en) * 2017-04-27 2017-09-01 国网浙江省电力公司丽水供电公司 A kind of electric substation's route protection service without power-off device and repair method
CN107171305A (en) * 2017-07-01 2017-09-15 合肥东玖电气有限公司 A kind of overvoltage inhibiting apparatus

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN103022986A (en) * 2012-12-14 2013-04-03 滁州安瑞电力自动化有限公司 Digital line protection measuring and control device
CN103022986B (en) * 2012-12-14 2015-07-22 滁州安瑞电力自动化有限公司 Digital line protection measuring and control device
CN107121619A (en) * 2017-04-27 2017-09-01 国网浙江省电力公司丽水供电公司 A kind of electric substation's route protection service without power-off device and repair method
CN107121619B (en) * 2017-04-27 2019-07-19 国网浙江省电力公司丽水供电公司 A kind of electric substation's route protection service without power-off device and repair method
CN107171305A (en) * 2017-07-01 2017-09-15 合肥东玖电气有限公司 A kind of overvoltage inhibiting apparatus

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CF01 Termination of patent right due to non-payment of annual fee

Granted publication date: 20130814

Termination date: 20151214

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