CN201312143Y - Measuring and control terminal of signal power supply - Google Patents
Measuring and control terminal of signal power supply Download PDFInfo
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- CN201312143Y CN201312143Y CNU2008201787917U CN200820178791U CN201312143Y CN 201312143 Y CN201312143 Y CN 201312143Y CN U2008201787917 U CNU2008201787917 U CN U2008201787917U CN 200820178791 U CN200820178791 U CN 200820178791U CN 201312143 Y CN201312143 Y CN 201312143Y
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Abstract
The utility model relates to a monitoring terminal in a power distribution system, which is a small remote terminal unit designed by adopting an embedded system based on an ARM processor and a uClinux operating system. The monitoring terminal adopts a modularized, and multi-microprocessor laminating industrial control plate structure to achieve different communication networking manner, comprises a power supply module, a main board module, a remote signaling module, a remote control module and a remote measurement module, can be applied to the railway remote-control system to achieve the control of a thorough circuit and a self-close circuit in railways, besides, the monitoring terminal can achieve the following functions: a measuring function, switch state monitoring and remote control functions, incident recording and wave recording functions, communication function and the like.
Description
Technical field
The utility model relates to a kind of monitor terminal of distribution system.
Background technology
The common method of modelled signal power supply detection and control terminal RTU is to adopt industrial control computer, expansion observing and controlling hardware interface circuit.This method has short, favorable expandability of design cycle, develops advantage easily, but the RTU cost height of design, volume is big, and power consumption is big.Adopt single-chip microcomputer or DSP design RTU such as 80C196, lay particular emphasis on the basic function that realizes remote terminal unit,, influence the performance of RTU because abilities such as the calculation process of single-chip microcomputer and hardware expanding are lower.Adopt uC/OS-II design remote terminal unit, realize the basic function of remote terminal unit, lay particular emphasis on the realization of AC sampling function, but do not have the network enabled agreement, also do not have the realization of agreement on the remote terminal unit.
And based on the RTU of arm processor design, it is low to have cost on the hardware, and volume is little, power consumptive province, advantage such as disposal ability is strong; Owing to adopt uClinux operating system, there are many outstanding application program achievements to utilize on the software.Just because of these advantages, adopt ARM and uClinux design remote terminal unit to become a focus.The uClinux open source code, has complete operation system function, less demanding to hardware resource.Use the ARM-uCinux designed system, have comprehensive advantage at aspects such as volume, cost, power consumption, functions.This technology has certain application prospect in the telemechanical field, but mainly adopts the desktop computer designed system in the past.
Summary of the invention
The purpose of this utility model is the problem at present existence, and a kind of signal power source detection and control terminal of new embedded system is provided.
At above purpose, the technology path that the utility model adopts is: comprise with lower module: power module, mainboard module, remote signal module, remote control module, telemetry module, each module are interface basis with the motherboard bus; Mainboard module comprises embedded ARM processor, FLSAH memory, internal memory, serial ports, embedded real-time operating system, motherboard bus drive circuit; Remote control and remote signal module are directly expanded by motherboard bus; Expansion CAN bus communication module is communicated by letter with telemetry module by CAN on the motherboard bus.
With arm processor and uClinux operating system serves as that a kind of little remote terminal unit of Embedded System Design is adopted on the basis, the host CPU module adopts 32 high-performance embedded arm processors, application software is based on embedded real-time multi-task operating system ucLinux, data acquisition is adopted the DSP technology with processing, many CPU division of labor are clear and definite, coordination has well guaranteed accuracy and the integrality of telecontrol system measurement, record ripple initial data; The core of signal power source detection and control terminal is a computer on the hardware, comprises processor, memory, man-machine interface etc., in order to carry out the observing and controlling function of remote terminal unit, needs a large amount of peripheral interface circuits of expansion.The observing and controlling number of objects difference of different electric substations is very big, and in order to improve the versatility of remote terminal unit, the stacked Industry Control plate structure that the utility model adopts telemetry circuit modularization, multimicroprocessor realizes different communication networking modes; Adopt totally-enclosed concealed fitting machine box structure, both artistic and practical; The design of multi-layer sheet surface mount makes that the systemic-function expansion is very convenient, and reliability and EMC design simultaneously is very comprehensive, and the every performance of the Electro Magnetic Compatibility of equipment all reaches the requirement of IEC standard code.
Signal power source detection and control terminal FTU has following characteristics:
(1) adopt modularized design, the quantity of each functional unit can be according to field condition, expansion easily.
(2) primary processor adopts 32-bit microprocessor, and processing speed is fast.Adopt embedded OS, stable performance, powerful, network function is abundant.
(3) the AC sampling unit adopts advanced DSP technology, 14 high-performance AD converter.Gather in real time and analysis electrical network waveform, record trouble Wave data.
(4) communication part is fit to the multiple network form, as Ethernet, special railway line etc., and the optional optical fiber of while medium of communication, coaxial cable, Shielded Twisted Pair.
(5) adopt European standard PC case, convenient for installation and maintenance, Electro Magnetic Compatibility is good.
(6) field bus technique of employing standard can be expanded field bus device as required.
(7) system has adopted Anti-interference Design, and WATCH DOG realizes crashing from reset function, the system reliability height.
(8) has the function that powerful locality monitors remote signalling, remote measurement, logout, communication message, fault waveform record.Local by network interface or serial ports, the various data files in the deriving means easily.
(9) communication protocol of employing standard: IEC870-5-101 and IEC870-5-104 agreement.
Signal power source detection and control terminal FTU has following function:
(1) measurement function
Basic configuration: 8 road input voltages, 8 road input currents.The A/D conversion accuracy is not less than 0.1%, and has taked certain anti-interference and quarantine measures at defeated people's interface.The electric weight that can measure comprises all three-phase AC electric quantities of perforation, self-closing two circuits, i.e. three-phase line voltage, phase voltage, electric current, active power, reactive power, power factor, frequency etc.
(2) on off state monitors
Remote signalling: basic configuration 15 tunnel inputs.Can be configured to 30 road or 45 tunnel inputs easily.No source contact mode is adopted in the remote signalling input, and the remote signalling power supply is DC48V (can carry out conversion according to on-site actual situations).Taked the photoelectricity quarantine measures and prevented the means that the monitored object contact bounce disturbs at input interface.The resolution of SOE is 5ms (millisecond), can carry out accident analysis, emergency review accurately to the switch journal.
(3) distant control function
Basic configuration is No. 10 relays control outputs (DO), realizes telemechanical control.Can be configured to 20 the tunnel easily.The contact output capacity is 250VAC 5A, and the output contact closing time is that 100ms～20s is adjustable continuously, and takes the photoelectricity quarantine measures at output interface.Output contact can independently use, also can form to close/separating brake is to using.Adopt remote signal output safeguard measure, guarantee that control output is reliably errorless.
(4) logout and record ripple
Can be with switch motion, the out-of-limit trigger condition that is set at of parameter, trigger condition is set up, and will carry out logout or waveform recording.
The moment that logout will trigger, event type, relevant parameter, state write down storage in the lump.
The waveform recording meeting will trigger the waveform of each passage in 5 cycles behind the moment, preceding 5 cycles of trigger point, the trigger point and note truly.
Automatically behind the record data, can realize uploading automatically data or manually call together and get.
(5) communication function
The RS232 interface that 2 standards are arranged in the basic configuration, a communication port that is used to safeguard, a network communication interface.
Three serial ports are all supported the communication speed of 19.2Kbps, and the RS232 mouth of two standards can carry out the communication transmission of both direction simultaneously.The communication baud rate of each serial ports, software setting as required, baud rate reaches as high as 115.2Kbps.
Support IEC870-5-101 and IEC870-5-104 communication protocol.
Network interface is also supported the ftp file transmission.
Description of drawings
Fig. 1 signal power source detection and control terminal general structure block diagram
Fig. 2 motherboard circuit composition frame chart
Fig. 3 CAN bus module circuit theory diagrams
Fig. 4 remote signalling input schematic diagram
Fig. 5 remote control circuit schematic diagram
Fig. 6 telemetry module circuit block diagram
Fig. 7 remote measurement electric current, voltage measurement input circuit
Each integrated circuit board erection sequence figure of Fig. 8
Embodiment
In the accompanying drawing 1, various circuit are designed to corresponding module by function, are interface basis with the motherboard bus.
Mainboard module is core with S3C4510B.Main configuration is: 16M byte dynamic random access memory SDRAM (two HY57V651620B), the FLASH of 2M byte (a slice AM29LV160DB); Two asynchronous serial communication interfaces that processor is inner integrated, serial ports 0 and serial ports 1; A 10M Ethernet interface; House dog and reset circuit (MAX706); RTU motherboard bus drive circuit.
Serial ports 0 is used for debugging as control desk; Serial ports 1 connects LCD display and touch-screen, realizes the man-machine interface of local monitoring.
The observing and controlling interface circuit mainly contains remote control module, remote signal module (switch acquisition) and telemetry module (analog acquisition).Remote control and shake the letter module and directly expand by motherboard bus.Telemetry module adopts fieldbus (CAN) communication interface.Expansion CAN bus communication module on the RTU motherboard bus for this reason realizes and the communicating by letter of telemetry module.
Serial port module (chip PC16C550) is expanded from motherboard bus.Connect modulator-demodulator (Modem) with this module, realize the RTU telecommunication.
The RTU motherboard bus is the basis of observing and controlling hardware module expansion, is again a Peripheral Interface on the processor bus.
For ease of the expansion of module, the RTU motherboard bus is defined as follows:
Data/address bus H-D0～H-D7; Address bus H-A0～H-A7; Address chip selection signal H-S0～H-S6; Read-write control signal H-WR and H-RD; Address latch control signal H-ALE; Breakout service request control signal H-INT0～H-INT3; Reset signal H-RESET.
Use the following bus signals of processor to drive the RTU motherboard bus: address bus A0-A11, data/address bus D0-D7.Read to enable control signal nOE, write and enable control signal nWBE0, peripheral hardware (I/O) address chip selection signal nECS0.And 4 interruption controls holding wire nINREQ0～nINREQ3.
Be compatible observing and controlling interface circuit device commonly used, motherboard bus is according to the Transistor-Transistor Logic level design of 5V.The 4510B bus is the CMOS level of 3.3V.There are the difference on speed and the level in processor bus and RTU motherboard bus, can not directly link to each other, between need a bus driving circuits.Bus driving circuits is the part of mainboard module.It realizes expansion, level conversion and the driving of processor bus to the RTU motherboard bus.Present technique adopts the bidirectional bus buffer 74LVX4245 of dual power supply, realizes level conversion and driving between processor data bus and the RTU data/address bus.
The chip that some are commonly used, as CAN bus control unit SJA1000, clock chip DS12887 etc., an address latch is with in inside, needs address latch signal ALE, could realize interface.S3C4510B does not have ale signal, so motherboard bus is expanded ale signal, could realize the interface of this class device.An address chip selection signal S7 negate with U1 writes data to the S7 address, can simulate the ALE control signal, and realizes the function of ALE.
In the accompanying drawing 2, mainboard is to be core with the arm processor, has disposed corresponding peripheral components.Arm processor is that the circuit structure of core is through the method for the mature and reliable of checking, on this basis, has expanded the motherboard bus drive circuit by internal bus, has expanded watchdog circuit and other auxiliary circuit in addition.
In the accompanying drawing 3, the CAN bus module is core with SJA1000, and communication data is isolated through high-speed photoelectric coupler G1, G2, and 82C250 drives, and is connected to outside CAN bus from binding post J2.P1 is the DC/DC power module that the 5V of 1W changes 5V.The CAN module has used H-S0 as chip selection signal, and its base address is 0x3600000.SJA1000 bus compatible Transistor-Transistor Logic level, data/address bus and interrupt signal line have driving force, can be directly and the motherboard bus interface, simple and convenient from RTU motherboard bus expansion telemetry circuit.
In the accompanying drawing 4, remote signal module is realized the hardware circuit that various switching value inputs are gathered.Its major function is the input electrical isolation and the signal level conversion of switching signal, and input signal is carried out suitable filtering, reduces signal jitter.The assignment scope 40V ~ 220V of input signal, the size of concrete threshold value according to on-the-spot remote signalling magnitude of voltage by hardware setting.Isolating device adopts photoelectrical coupler TLP521-4, and isolation voltage can reach 2500VRMS.The input remote signalling quantity 15 tunnel of individual module.No. 15 photoelectrical couplers adopt the common cathode connection.The inverse parallel of photoelectrical coupler input the protection diode.
In the accompanying drawing 5, the execution unit of remote control is a relay, and the contact of relay is an important parameter of remote control performance.Remote control output contact capacity requirement: 0.5A/240Vac, 1A/110Vdc.Each module remote control output way: 10 tunnel.Model: G2R-1A-E-TU-5.It is little that the relay of this model has a volume, the advantage that contact capacity is big.Electrical interface partly adopts CPLD (EMP7128SLL84) to realize.
Carrying out control circuit is the relay S1 ~ S4 contact of 4 polyphones.Have only when 1010 logics are satisfied in the output of S1 ~ S4, node b could obtain the 12V out-put supply.Under the attonity situation, the b point voltage always equals 0.K1, K2 are output relays, the folding condition of control external switch, and during attonity, they are in normally open.Node FD1, FD2 state are tested signal as the anti-censorship of node Nx1, Nx2.This mode makes remote control process be divided into two steps: select and execution.Execution relay S (S1 ~ S4), selective relay K (K1 ~ K10).Initial condition, S=0101, T2 at all events is worth, because the K1 coil does not have power supply, output contact is failure to actuate.Program is given a state of a control signal of T2 T2C by the latch of bus interface logic circuit, the level of T2 Control Node Nx1, and Rx1 is a pull-up resistor.The state of T2 is equivalent to the level of Nx.The Nx1 level signal through R3, R4 level translation, obtains FD1, is input to bus interface circuit, and program reads this feedback signal level.
In the accompanying drawing 6, telemetry module is realized the AC sampling of three-phase AC electric quantity.Telemetry module is core with DSP, expands 14 modulus AD conversion chip MAX125CCAX, CAN bus driver chip, and other peripheral components.DSP adopts timer interrupt program operation MAX125 to gather the electrical network Wave data.Through calculating the electrical network electric weight, when the difference of twice measured value in front and back greater than certain setting threshold, then generate data, the band markers stores in the sequence of events recording array.Mainboard and remote measurement plate by the CAN bus to the time.Adopt this method, reduce the data conveying capacity, reduce the requirement of CAN bus data transmision peak bandwidth, help reducing the difficulty of programming.
Accompanying drawing 7, R19 is converted to voltage with the output current of current transformer in remote measurement electric current, the voltage measurement input circuit, and D5, D6 are the 5V voltage stabilizing utmost point pipes of oppositely contacting, and output voltage is once being surveyed under the surge current, can not surpass 5.7V.Voltage measurement is to adopt the current transformer mode, and R14 is a divider resistance, and in the real work, R14 bears the main voltage on road, can ignore the pressure drop of instrument transformer PT1, so the electric current linearity of R14 is proportional to the transmission of electricity pressure.Is voltage by R20 with current conversion, and output voltage promptly has good ratio with tested voltage.
Use for convenience, each module is made corresponding integrated circuit board, be installed in the machine cage of one 8 groove, be called the FTU measurement and control unit.According to Fig. 8, various integrated circuit board erection sequences are followed successively by hollow plate, power panel, mainboard, remote signalling YX plate, remote control YK plate, hollow plate, remote measurement YC1 and YC2 plate.
Claims (8)
1, signal power source detection and control terminal is characterized by: comprise with lower module: power module, mainboard module, remote signal module, remote control module, telemetry module, each module are interface basis with the motherboard bus; Mainboard module comprises embedded ARM processor, FLSAH memory, internal memory, serial ports, embedded real-time operating system, motherboard bus drive circuit; Remote control and remote signal module are directly expanded by motherboard bus; Expansion CAN bus communication module is communicated by letter with telemetry module by CAN on the motherboard bus.
2, signal power source detection and control terminal according to claim 1 is characterized by: described motherboard bus expansion has serial port module, is connected with modulator-demodulator on this serial port module.
3, signal power source detection and control terminal according to claim 1 and 2, it is characterized by: described motherboard bus is defined as follows: data/address bus H-D0～H-D7; Address bus H-A0～H-A7; Address chip selection signal H-S0～H-S6; Read-write control signal H-WR and H-RD; Address latch control signal H-ALE; Breakout service request control signal H-INT0～H-INT3; Reset signal H-RESET.
4, signal power source detection and control terminal according to claim 1 and 2 is characterized by: the isolating device of described remote signal module adopts photoelectrical coupler, and each photoelectrical coupler adopts common cathode connection, the inverse parallel of photoelectrical coupler input the protection diode.
5, signal power source detection and control terminal according to claim 1 and 2, it is characterized by: the execution unit of remote control module is a relay, electrical interface partly adopts CPLD to realize.
6, signal power source detection and control terminal according to claim 1 and 2 is characterized by: described telemetry module adopts the DSP technology, comprises A/D converter.
7, signal power source detection and control terminal according to claim 1 and 2, it is characterized by: described power module, mainboard module, remote signal module, remote control module, remote signal module are made up of the integrated circuit board of correspondence, i.e. power card, mainboard card, remote signalling card, remote card, remote measurement card.
8, signal power source detection and control terminal according to claim 7 is characterized by: described each integrated circuit board is installed in the machine cage.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNU2008201787917U CN201312143Y (en) | 2008-11-14 | 2008-11-14 | Measuring and control terminal of signal power supply |
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| CNU2008201787917U CN201312143Y (en) | 2008-11-14 | 2008-11-14 | Measuring and control terminal of signal power supply |
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Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102346465A (en) * | 2011-06-16 | 2012-02-08 | 刘志和 | Energy-saving energy online monitoring system |
| CN102447304A (en) * | 2010-09-30 | 2012-05-09 | 上海华建电力设备股份有限公司 | Modular electric power measurement and control device |
| CN102522827A (en) * | 2011-12-31 | 2012-06-27 | 国网信息通信有限公司 | Intelligent integrated electricity-distributing method and device as well as intelligent integrated electricity-distributing terminal |
| CN102736542A (en) * | 2012-06-28 | 2012-10-17 | 北京鼎汉技术股份有限公司 | Touch control based signal power source monitoring device |
| CN104155947A (en) * | 2014-07-30 | 2014-11-19 | 北京太格时代自动化系统设备有限公司 | Monitoring system used for illumination of electromechanical device or tunnel |
| CN110989461A (en) * | 2019-12-24 | 2020-04-10 | 科大智能电气技术有限公司 | Distribution automation terminal and alternating current sampling extensible method thereof |
| US11644974B2 (en) * | 2018-11-01 | 2023-05-09 | Delta Electronics (Shanghai) Co., Ltd. | Time-sharing wave recording method |
-
2008
- 2008-11-14 CN CNU2008201787917U patent/CN201312143Y/en not_active Expired - Fee Related
Cited By (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102447304A (en) * | 2010-09-30 | 2012-05-09 | 上海华建电力设备股份有限公司 | Modular electric power measurement and control device |
| CN102346465A (en) * | 2011-06-16 | 2012-02-08 | 刘志和 | Energy-saving energy online monitoring system |
| CN102522827A (en) * | 2011-12-31 | 2012-06-27 | 国网信息通信有限公司 | Intelligent integrated electricity-distributing method and device as well as intelligent integrated electricity-distributing terminal |
| CN102522827B (en) * | 2011-12-31 | 2014-06-18 | 国家电网公司 | Intelligent integrated electricity-distributing method and device as well as intelligent integrated electricity-distributing terminal |
| CN102736542A (en) * | 2012-06-28 | 2012-10-17 | 北京鼎汉技术股份有限公司 | Touch control based signal power source monitoring device |
| CN102736542B (en) * | 2012-06-28 | 2015-05-20 | 北京鼎汉技术股份有限公司 | Touch control based signal power source monitoring device |
| CN104155947A (en) * | 2014-07-30 | 2014-11-19 | 北京太格时代自动化系统设备有限公司 | Monitoring system used for illumination of electromechanical device or tunnel |
| CN104155947B (en) * | 2014-07-30 | 2017-02-08 | 北京太格时代自动化系统设备有限公司 | Monitoring system used for illumination of electromechanical device or tunnel |
| US11644974B2 (en) * | 2018-11-01 | 2023-05-09 | Delta Electronics (Shanghai) Co., Ltd. | Time-sharing wave recording method |
| CN110989461A (en) * | 2019-12-24 | 2020-04-10 | 科大智能电气技术有限公司 | Distribution automation terminal and alternating current sampling extensible method thereof |
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| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C17 | Cessation of patent right | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20090916 Termination date: 20101114 |