CN103036625A - Design method of detecting system for telecontrol remote terminal unit (RTU) and information channel - Google Patents
Design method of detecting system for telecontrol remote terminal unit (RTU) and information channel Download PDFInfo
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- CN103036625A CN103036625A CN2012105291485A CN201210529148A CN103036625A CN 103036625 A CN103036625 A CN 103036625A CN 2012105291485 A CN2012105291485 A CN 2012105291485A CN 201210529148 A CN201210529148 A CN 201210529148A CN 103036625 A CN103036625 A CN 103036625A
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Abstract
In a design method of a detecting system for a telecontrol remote terminal unit (RTU) and an information channel, a structure of the detecting system for the telecontrol RTU and the information channel is confirmed to be a distributed control system, each converting station is provided with a front terminal machine, one industrial control computer is used for centralized management control in an electric power dispatching center, a circuit switched data (CSD) communication mode of a global system for mobile communications (GSM) is applied, bidirectional data communication between a field main control unit and a monitoring center is achieved, and alarm information is transmitted to a mobile phone of a manager through a short message. After a central processing unit (CPU) is first initiated, information channel data of telemetering, remote signaling and carrier frequency are respectively collected, and then malfunction distinguishing is operated according to related principles, if the system is abnormal, a GSM module is started to send malfunction information to a background monitoring center. The design method of the detecting system for the telecontrol remote terminal unit (RTU) and the information channel has the advantages that the detecting system for the telecontrol RTU and the information channel is used for monitoring conditions of voltages and currents of the RTU and other devices, functions of the remote signaling and the remote control are achieved, remote operations to the RTU and other devices are available, and data used in the process of operations is stored in a data base for future reference.
Description
Technical field
The present invention relates to the control system technical field, particularly a kind of telemechanical RTU and Channel Detection design method.
Background technology
In the running of transformer station, need to carry out Real Time Monitoring by the power-management centre in a distant place.With about operational factor and state information by channel, fiber optic cables etc. are uploaded the control centre and control command are issued among the RTU of transformer station.
But in this running; often can occur making for a certain reason transformer station and power-management centre loss signal to contact; can't judge that in the power-management centre RTU of transformer station operation mistake occurs and is directed at the RTU system in case of system halt; to data can't be uploaded, still because channel-failures causes communication failure.Thereby impact for system management and safety in production even have an accident.
Summary of the invention
The objective of the invention is for monitoring substation relevant device accurately, the spy provides telemechanical RTU and Channel Detection design method.
The invention provides a kind of telemechanical RTU and Channel Detection design method, it is characterized in that: the scheme of described telemechanical RTU and Channel Detection design method is determined:
The structure of confirming RTU and channel monitoring system should be Distributed Control System, and namely a front-end processor is respectively installed by each transformer station.The power-management centre is managed control concentratedly with an industrial control computer; Have following four kinds of communication modes can supply to adopt:
[1] still utilizes the original communication channel of transformer station, the i.e. mode such as optical cable or cable;
[2] utilize telephone communication network;
[3] adopt the wireless cluster communication network;
[4] utilize GSM public's mobile radio networks;
In the above-mentioned communication mode, first kind of way can effectively judge RTU and passage generic failure, but then can't judge RTU and passage simultaneous faults or passage error rate height, but practical, cost is low and do not have maintenance cost;
The second way is a kind of available mode, but still is a kind of wired transmission means, causes telephone wire to interrupt if there is outside destroy and natural calamity, and system can't be worked.
The third, adopt the wireless cluster communication mode can overcome the shortcoming of front dual mode, but need to set up communication base station, its communication distance is subject to the restriction of transmitting power, the expense of building a station is high and relate to work such as applying for frequency, and the energy that need cost a lot of money is safeguarded communication system.
The 4th kind of communication mode is the communication mode that is based upon on GSM public's mobile radio networks basis, need not network operation, can carry out voice, data and short message etc. and communicate by letter.This communication modes has the characteristics such as cost of use is low, and communication distance is unrestricted, and communication efficiency is stable, and transfer of data is reliable.By scheme relatively, only have first kind of way and the 4th kind of communication mode are developed respectively, could be fit to the demand of different user.
System configuration and operation principle:
Utilize telecontrol channel itself to realize the following Fig. 1 of fault detection system structure:
This device is installed in the RTU end, monitors all the time the receipts passage of RTU, and when the receipts channel signal was normal, this device was in listening state, does not affect the proper communication of RTU.When receiving channel signal without carrier frequency, signal level is lower than-40DB, and this device is thrown RTU away and sent out passage, and the RTU state is utilized a dispatching terminal on the CDT stipulations.This device can gather quantity of state and 8 tunnel analog quantitys (0-30V) of 8 road RTU, and has the two-way remote control;
Utilize gsm communication to realize the fault monitoring system structure: following Fig. 2
Whole system is comprised of three parts: the front-end processor part, background monitoring centring system and the gsm wireless public communication system that namely are installed on each substation field;
Front-end processor is finished the collection to the various telemetered signals of transformer station, remote signals and CF signal.When abnormal conditions occurring, by the gsm wireless communication system, related data is uploaded to the background monitoring center, also can receives the various instruction and datas that transmitted by the Surveillance center line correlation operation of going forward side by side.
The background monitoring center receives the field data of being uploaded by front-end processor, and can realize sound and light alarm.Can transfer at any time front-end processor operating state and carrier frequency channel data, terminal sends various operational orders forward, downloads related data.
Gsm wireless mobile communication system GSM (Global Sysent Mobilecommunication) is global system for mobile communications.Be present based on comparative maturity in the mobile communication system of tdma, perfect, most widely used a kind of system is the major way of China's public mobile network at present.This system mainly provides the business such as voice, short message, data.The communication mode of based on data business and short message can be made the various detections of transmission, the data communication system of monitor data signal and control command.In fields such as military affairs, national defence, industry, location navigation, personal communications terminal etc. have been begun for remote monitoring at present.Because China set up perfect GSM public mobile network network at present, thereby use said system and just need not to set up again dedicated communications network, also do not need a large amount of system maintenance expenses.
Native system has mainly been used the CSD data communication mode of gsm system and has been realized the bidirectional data communication of on-the-spot main control unit and Surveillance center.And the breath of will reporting to the police utilizes the SIM short message way to transfer in administrative staff's mobile phone.
Owing to adopting CSD data mode and the SIM short message data communication mode of GSM, thus native system have real-time, the automatic data processing perfect in shape and function, transmission speed is fast, antijamming capability is strong, the compatible characteristics such as good.
Utilize telecontrol channel itself to realize the fault detect design principle: such as Fig. 3
The core of this device is to adopt the N80C196KB16 position single-chip microcomputer of INTEL Corp., and channel management partly utilizes the AM7910 chip to come the quality of sense channel, utilizes a relay to realize the switching of passage.Part of data acquisition is finished YC and YX data acquisition.The remote control operating part can directly act on AC and DC power supply or the reset circuit of RTU.Data-interface part can with RTU or other device interface, realize monitoring mutually.Display panel part can show the operating state, channel status, YX state of RTU etc.
Utilize gsm communication to realize fault detect front-end processor hardware and software design principle:
In order to satisfy the aforementioned techniques requirement, determine the structure of front-end processor as shown in Figure 4
Front-end processor is mainly take chip microprocessor C8051F020 as core, in the chip microprocessor peripheral expansion two radio interface, the telemetered signal interface that eight input port are 12, the remote signalling input interface of eight input ports.Two remote control switch output ports, RS-232 serial communication interface and status indicator lamp array.
Chip microprocessor C8051F020 is a fully-integrated mixed-signal system level chip, and is fully compatible with 8051 instruction set.
C8051F020 is a SOC (system on a chip) that really works alone, and C8051F020 is used for RTU and channel monitoring system, can reduce in a large number peripheral components, gives full play to the high-speed characteristics of F020, has greatly improved the integrated level of system.
The function of carrier frequency channel interface is that the carrier frequency channel data are read in chip microprocessor after conversion.Adopted two FSK modem chip AM7910 to realize conversion for up-downgoing carrier frequency data.AM7910 is a FSK modem chip that is specifically designed to the low-speed serial analog channel, is characterized in supporting CCITT V.21, and V.23, Bell 103, Bell 202 stipulations, traffic rate 300-2400bit/s.Peripheral circuit is simple, utilizes outside wire jumper, just can realize multiple stipulations, multiple speed, and several working ways is selected.
Because chip microprocessor C8051F020 has dual serial communication interface UART, but one of them has distributed to the use of gsm communication module.Therefore, two passages of carrier frequency only have a serial communication interface available up and down.For satisfying the up and down conversion requirement of carrier frequency passage, adopted a slice MCS-51 series monolithic 89C2051 to design a serial/parallel data change-over circuit.So, in two carrier frequency channels, one of them adopts the direct Carrier frequency conversion data of a slice AM7910, and sends in the serial line interface of C8051F020.Another one carrier frequency channel data are sent in the serial line interface of 89C2051 single-chip microcomputer after the AM7910 conversion, then carry out preliminary treatment through 89C2051, and are converted to parallel data, and parallel carrier frequency data are sent in the parallel interface of C8051F020.The carrier frequency channel schematic diagram, as shown in Figure 5.
For the telemetered signal interface, require its input ceiling voltage to be ± 30V, and the A/D converter maximum input voltage is+3V in the sheet of C8051F020 chip microprocessor.Input voltage for+30V has adopted the electric resistance partial pressure attenuator circuit, and the input voltage of+30V is reduced to+the 3V input.And in order to measure-input voltage of 30V, having designed the employing operational amplifier carries out anti-phase amplification, and the input voltage of-30V is reduced to+the 3V input.Two kinds of circuit design are switched positive negative input with the short circuit wire jumping method on same circuit board.Utilize programmable amplifier and related software in the sheet, can realize 0-30V; 0-15V; 0-7.5V surveying work has been simplified in the automatic switchover of gear greatly, and has improved measuring accuracy.Level shifting circuit as shown in Figure 6.
In the remote signals interface, adopt photoelectrical coupler will input remote signals and native system isolation, reduced the impact of external interference for system.The remote signalling interface circuit, as shown in Figure 7.
The gsm communication module: the gsm communication module adopts the industrial communication module TC35T of Siemens Company.TC35T has voice, data, short message, four kinds of transmission meanss of FAX; Be operated in GSM-900MHz and the 1800MHz frequency band range; Working power 8-30V; Baud rate is 300bps-115kbps, is the auto-baud setting at 1200bps-115kbps; Data transmit and adopt AT Command Set; RS232 interface and the power interface of standard externally are provided.During application chip microprocessor C8051F020 is mixed standard RS232 serial port chip and directly be connected with cable with the serial port of TC35T, just can use.
The TC35T module must be carried out the initialization setting to TC35T with a computer off-line before use, and parameters is stored among the TC35T.
Because module no longer receives under data communication mode and receives other AT instruction, can only carry out transfer of data.Thereby need to use ＂ +++＂ order is carried out data pattern to the switching of command mode.
Front-end processor software main program flow process as shown in Figure 8.In flow chart, CPU is initialization at first.Gather respectively afterwards remote measurement, remote signalling, then the carrier frequency channel data carry out fault distinguishing according to correlation principle.If the discovery system occurs unusual, then start the gsm communication module fault message is sent the background monitoring center that causes.
Described telemechanical RTU and Channel Detection design method, can be simultaneously online to a kind ofly interrogating based on GSM Netcom that RTU device and channel carrier are monitored.Each substation RTU uploading data of main website centralized displaying, failure judgement can realize again the substation carried out the multi-functional supervisory control systems such as remote control, remote measurement, remote signalling.
Described telemechanical RTU and Channel Detection design method, can realize the on-line monitoring to RTU and passage, have fault judgement, warning, storage, message Presentation Function, terminal unit has remote measurement, remote signalling, remote control and channel failure arbitration functions, utilize the GSM channel to realize the on-line monitoring of RTU and channel, be used for telemechanical RTU and the passage of any type.
Advantage of the present invention:
Telemechanical RTU of the present invention and Channel Detection design method are used for monitoring RTU or miscellaneous equipment electric current and voltage situation.Have remote signaling function, be used for the correlation behavior of monitoring substation relevant device operate condition or RTU.Have distant control function, can carry out straighforward operation for RTU or miscellaneous equipment.The supervisory channel state comprises supervisory channel level channel data correctness, and can read at any time channel data when needed and study and judge.When the distant brownout of remote measurement or remote signalling displacement and channel data mistake occurring, should in time report monitoring center and alarm, the data-storing in all mentioned operations process in database with usefulness for future reference.
Description of drawings
The present invention is further detailed explanation below in conjunction with drawings and the embodiments:
Fig. 1 is for utilizing telecontrol channel itself to realize the fault detection system structure chart;
Fig. 2 is based on gsm wireless public communication system structure chart;
Fig. 3 is for utilizing telecontrol channel itself to realize fault detect design principle figure;
Fig. 4 is the front-end processor system block diagram;
Fig. 5 is the carrier frequency channel schematic diagram;
Fig. 6 is the telemetry interface circuit diagram;
Fig. 7 is remote signalling interface circuit schematic diagram;
Fig. 8 is front-end processor software main program flow chart.
Embodiment
Embodiment 1
The present embodiment provides a kind of telemechanical RTU and Channel Detection design method, it is characterized in that: the scheme of described telemechanical RTU and Channel Detection design method is determined:
The structure of confirming RTU and channel monitoring system should be Distributed Control System, and namely a front-end processor is respectively installed by each transformer station.The power-management centre is managed control concentratedly with an industrial control computer; Have following four kinds of communication modes can supply to adopt:
[1] still utilizes the original communication channel of transformer station, the i.e. mode such as optical cable or cable;
[2] utilize telephone communication network;
[3] adopt the wireless cluster communication network;
[4] utilize GSM public's mobile radio networks;
In the above-mentioned communication mode, first kind of way can effectively judge RTU and passage generic failure, but then can't judge RTU and passage simultaneous faults or passage error rate height, but practical, cost is low and do not have maintenance cost;
The second way is a kind of available mode, but still is a kind of wired transmission means, causes telephone wire to interrupt if there is outside destroy and natural calamity, and system can't be worked.
The third, adopt the wireless cluster communication mode can overcome the shortcoming of front dual mode, but need to set up communication base station, its communication distance is subject to the restriction of transmitting power, the expense of building a station is high and relate to work such as applying for frequency, and the energy that need cost a lot of money is safeguarded communication system.
The 4th kind of communication mode is the communication mode that is based upon on GSM public's mobile radio networks basis, need not network operation, can carry out voice, data and short message etc. and communicate by letter.This communication modes has the characteristics such as cost of use is low, and communication distance is unrestricted, and communication efficiency is stable, and transfer of data is reliable.By scheme relatively, only have first kind of way and the 4th kind of communication mode are developed respectively, could be fit to the demand of different user.
System configuration and operation principle:
Utilize telecontrol channel itself to realize the following Fig. 1 of fault detection system structure:
This device is installed in the RTU end, monitors all the time the receipts passage of RTU, and when the receipts channel signal was normal, this device was in listening state, does not affect the proper communication of RTU.When receiving channel signal without carrier frequency, signal level is lower than-40DB, and this device is thrown RTU away and sent out passage, and the RTU state is utilized a dispatching terminal on the CDT stipulations.This device can gather quantity of state and 8 tunnel analog quantitys (0-30V) of 8 road RTU, and has the two-way remote control;
Utilize gsm communication to realize the fault monitoring system structure: following Fig. 2
Whole system is comprised of three parts: the front-end processor part, background monitoring centring system and the gsm wireless public communication system that namely are installed on each substation field;
Front-end processor is finished the collection to the various telemetered signals of transformer station, remote signals and CF signal.When abnormal conditions occurring, by the gsm wireless communication system, related data is uploaded to the background monitoring center, also can receives the various instruction and datas that transmitted by the Surveillance center line correlation operation of going forward side by side.
The background monitoring center receives the field data of being uploaded by front-end processor, and can realize sound and light alarm.Can transfer at any time front-end processor operating state and carrier frequency channel data, terminal sends various operational orders forward, downloads related data.
Gsm wireless mobile communication system GSM (Global Sysent Mobilecommunication) is global system for mobile communications.Be present based on comparative maturity in the mobile communication system of tdma, perfect, most widely used a kind of system is the major way of China's public mobile network at present.This system mainly provides the business such as voice, short message, data.The communication mode of based on data business and short message can be made the various detections of transmission, the data communication system of monitor data signal and control command.In fields such as military affairs, national defence, industry, location navigation, personal communications terminal etc. have been begun for remote monitoring at present.Because China set up perfect GSM public mobile network network at present, thereby use said system and just need not to set up again dedicated communications network, also do not need a large amount of system maintenance expenses.
Native system has mainly been used the CSD data communication mode of gsm system and has been realized the bidirectional data communication of on-the-spot main control unit and Surveillance center.And the breath of will reporting to the police utilizes the SIM short message way to transfer in administrative staff's mobile phone.
Owing to adopting CSD data mode and the SIM short message data communication mode of GSM, thus native system have real-time, the automatic data processing perfect in shape and function, transmission speed is fast, antijamming capability is strong, the compatible characteristics such as good.
Utilize telecontrol channel itself to realize the fault detect design principle: such as Fig. 3
The core of this device is to adopt the N80C196KB16 position single-chip microcomputer of INTEL Corp., and channel management partly utilizes the AM7910 chip to come the quality of sense channel, utilizes a relay to realize the switching of passage.Part of data acquisition is finished YC and YX data acquisition.The remote control operating part can directly act on AC and DC power supply or the reset circuit of RTU.Data-interface part can with RTU or other device interface, realize monitoring mutually.Display panel part can show the operating state, channel status, YX state of RTU etc.
Utilize gsm communication to realize fault detect front-end processor hardware and software design principle:
In order to satisfy the aforementioned techniques requirement, determine the structure of front-end processor as shown in Figure 4
Front-end processor is mainly take chip microprocessor C8051F020 as core, in the chip microprocessor peripheral expansion two radio interface, the telemetered signal interface that eight input port are 12, the remote signalling input interface of eight input ports.Two remote control switch output ports, RS-232 serial communication interface and status indicator lamp array.
Chip microprocessor C8051F020 is a fully-integrated mixed-signal system level chip, and is fully compatible with 8051 instruction set.
C8051F020 is a SOC (system on a chip) that really works alone, and C8051F020 is used for RTU and channel monitoring system, can reduce in a large number peripheral components, gives full play to the high-speed characteristics of F020, has greatly improved the integrated level of system.
The function of carrier frequency channel interface is that the carrier frequency channel data are read in chip microprocessor after conversion.Adopted two FSK modem chip AM7910 to realize conversion for up-downgoing carrier frequency data.AM7910 is a FSK modem chip that is specifically designed to the low-speed serial analog channel, is characterized in supporting CCITT V.21, and V.23, Bell 103, Bell 202 stipulations, traffic rate 300-2400bit/s.Peripheral circuit is simple, utilizes outside wire jumper, just can realize multiple stipulations, multiple speed, and several working ways is selected.
Because chip microprocessor C8051F020 has dual serial communication interface UART, but one of them has distributed to the use of gsm communication module.Therefore, two passages of carrier frequency only have a serial communication interface available up and down.For satisfying the up and down conversion requirement of carrier frequency passage, adopted a slice MCS-51 series monolithic 89C2051 to design a serial/parallel data change-over circuit.So, in two carrier frequency channels, one of them adopts the direct Carrier frequency conversion data of a slice AM7910, and sends in the serial line interface of C8051F020.Another one carrier frequency channel data are sent in the serial line interface of 89C2051 single-chip microcomputer after the AM7910 conversion, then carry out preliminary treatment through 89C2051, and are converted to parallel data, and parallel carrier frequency data are sent in the parallel interface of C8051F020.The carrier frequency channel schematic diagram, as shown in Figure 5.
For the telemetered signal interface, require its input ceiling voltage to be ± 30V, and the A/D converter maximum input voltage is+3V in the sheet of C8051F020 chip microprocessor.Input voltage for+30V has adopted the electric resistance partial pressure attenuator circuit, and the input voltage of+30V is reduced to+the 3V input.And in order to measure-input voltage of 30V, having designed the employing operational amplifier carries out anti-phase amplification, and the input voltage of-30V is reduced to+the 3V input.Two kinds of circuit design are switched positive negative input with the short circuit wire jumping method on same circuit board.Utilize programmable amplifier and related software in the sheet, can realize 0-30V; 0-15V; 0-7.5V surveying work has been simplified in the automatic switchover of gear greatly, and has improved measuring accuracy.Level shifting circuit as shown in Figure 6.
In the remote signals interface, adopt photoelectrical coupler will input remote signals and native system isolation, reduced the impact of external interference for system.The remote signalling interface circuit, as shown in Figure 7.
The gsm communication module: the gsm communication module adopts the industrial communication module TC35T of Siemens Company.TC35T has voice, data, short message, four kinds of transmission meanss of FAX; Be operated in GSM-900MHz and the 1800MHz frequency band range; Working power 8-30V; Baud rate is 300bps-115kbps, is the auto-baud setting at 1200bps-115kbps; Data transmit and adopt AT Command Set; RS232 interface and the power interface of standard externally are provided.During application chip microprocessor C8051F020 is mixed standard RS232 serial port chip and directly be connected with cable with the serial port of TC35T, just can use.
The TC35T module must be carried out the initialization setting to TC35T with a computer off-line before use, and parameters is stored among the TC35T.
Because module no longer receives under data communication mode and receives other AT instruction, can only carry out transfer of data.Thereby need to use ＂ +++＂ order is carried out data pattern to the switching of command mode.
Front-end processor software main program flow process as shown in Figure 8.In flow chart, CPU is initialization at first.Gather respectively afterwards remote measurement, remote signalling, then the carrier frequency channel data carry out fault distinguishing according to correlation principle.If the discovery system occurs unusual, then start the gsm communication module fault message is sent the background monitoring center that causes.
Described telemechanical RTU and Channel Detection design method, can be simultaneously online to a kind ofly interrogating based on GSM Netcom that RTU device and channel carrier are monitored.Each substation RTU uploading data of main website centralized displaying, failure judgement can realize again the substation carried out the multi-functional supervisory control systems such as remote control, remote measurement, remote signalling.
Described telemechanical RTU and Channel Detection design method, can realize the on-line monitoring to RTU and passage, have fault judgement, warning, storage, message Presentation Function, terminal unit has remote measurement, remote signalling, remote control and channel failure arbitration functions, utilize the GSM channel to realize the on-line monitoring of RTU and channel, be used for telemechanical RTU and the passage of any type.
Claims (3)
1. a telemechanical RTU and Channel Detection design method, it is characterized in that: the scheme of described telemechanical RTU and Channel Detection design method is determined:
The structure of confirming RTU and channel monitoring system should be Distributed Control System, and namely a front-end processor is respectively installed by each transformer station; The power-management centre is managed control concentratedly with an industrial control computer; Have following four kinds of communication modes can supply to adopt:
[1] still utilizes the original communication channel of transformer station, the i.e. mode such as optical cable or cable;
[2] utilize telephone communication network;
[3] adopt the wireless cluster communication network;
[4] utilize GSM public's mobile radio networks;
In the above-mentioned communication mode, first kind of way can effectively judge RTU and passage generic failure, but then can't judge RTU and passage simultaneous faults or passage error rate height, but practical, cost is low and do not have maintenance cost;
The second way is a kind of available mode, but still is a kind of wired transmission means, causes telephone wire to interrupt if there is outside destroy and natural calamity, and system can't be worked;
The third, adopt the wireless cluster communication mode can overcome the shortcoming of front dual mode, but need to set up communication base station, its communication distance is subject to the restriction of transmitting power, the expense of building a station is high and relate to work such as applying for frequency, and the energy that need cost a lot of money is safeguarded communication system;
The 4th kind of communication mode is the communication mode that is based upon on GSM public's mobile radio networks basis, need not network operation, can carry out voice, data and short message etc. and communicate by letter; This communication modes has the characteristics such as cost of use is low, and communication distance is unrestricted, and communication efficiency is stable, and transfer of data is reliable; By scheme relatively, only have first kind of way and the 4th kind of communication mode are developed respectively, could be fit to the demand of different user;
System configuration and operation principle:
Utilize telecontrol channel itself to realize the fault detection system structure, be installed in the RTU end, monitor all the time the receipts passage of RTU, when the receipts channel signal was normal, this device was in listening state, does not affect the proper communication of RTU; When receiving channel signal without carrier frequency, signal level is lower than-40DB, and this device is thrown RTU away and sent out passage, and the RTU state is utilized a dispatching terminal on the CDT stipulations; This device can gather quantity of state and 8 tunnel analog quantitys (0-30V) of 8 road RTU, and has the two-way remote control;
Utilize gsm communication to realize the fault monitoring system structure: whole system is comprised of three parts: the front-end processor part, background monitoring centring system and the gsm wireless public communication system that namely are installed on each substation field;
Front-end processor is finished the collection to the various telemetered signals of transformer station, remote signals and CF signal; When abnormal conditions occurring, by the gsm wireless communication system, related data is uploaded to the background monitoring center, also can receives the various instruction and datas that transmitted by the Surveillance center line correlation operation of going forward side by side;
The background monitoring center receives the field data of being uploaded by front-end processor, and can realize sound and light alarm; Can transfer at any time front-end processor operating state and carrier frequency channel data, terminal sends various operational orders forward, downloads related data;
Native system has mainly been used the CSD data communication mode of gsm system and has been realized the bidirectional data communication of on-the-spot main control unit and Surveillance center; And the breath of will reporting to the police utilizes the SIM short message way to transfer in administrative staff's mobile phone;
Owing to adopting CSD data mode and the SIM short message data communication mode of GSM, thus native system have real-time, the automatic data processing perfect in shape and function, transmission speed is fast, antijamming capability is strong, the compatible characteristics such as good;
Utilize telecontrol channel itself to realize the fault detect design principle: adopt the N80C196KB16 position single-chip microcomputer of INTEL Corp., channel management partly utilizes the AM7910 chip to come the quality of sense channel, utilizes a relay to realize the switching of passage; Part of data acquisition is finished YC and YX data acquisition; The remote control operating part can directly act on AC and DC power supply or the reset circuit of RTU; Data-interface part can with RTU or other device interface, realize monitoring mutually; Display panel part can show the operating state, channel status, YX state of RTU etc.;
Utilize gsm communication to realize fault detect front-end processor hardware and software design principle: in order to satisfy the aforementioned techniques requirement, determine the structure of front-end processor: front-end processor is mainly take chip microprocessor C8051F020 as core, in the chip microprocessor peripheral expansion two radio interface, the telemetered signal interface that eight input port are 12, the remote signalling input interface of eight input ports; Two remote control switch output ports, RS-232 serial communication interface and status indicator lamp array;
Chip microprocessor C8051F020 is a fully-integrated mixed-signal system level chip, and is fully compatible with 8051 instruction set; C8051F020 is a SOC (system on a chip) that really works alone, and C8051F020 is used for RTU and channel monitoring system, can reduce in a large number peripheral components, gives full play to the high-speed characteristics of F020, has greatly improved the integrated level of system;
The function of carrier frequency channel interface is that the carrier frequency channel data are read in chip microprocessor after conversion; Adopted two FSK modem chip AM7910 to realize conversion for up-downgoing carrier frequency data; AM7910 is a FSK modem chip that is specifically designed to the low-speed serial analog channel, is characterized in supporting CCITT V.21, V.23, and Bell103, Bell202 stipulations, traffic rate 300-2400bit/s;
Because chip microprocessor C8051F020 has dual serial communication interface UART, but one of them has distributed to the use of gsm communication module; Therefore, two passages of carrier frequency only have a serial communication interface available up and down; For satisfying the up and down conversion requirement of carrier frequency passage, adopted a slice MCS-51 series monolithic 89C2051 to design a serial/parallel data change-over circuit; So, in two carrier frequency channels, one of them adopts the direct Carrier frequency conversion data of a slice AM7910, and sends in the serial line interface of C8051F020; Another one carrier frequency channel data are sent in the serial line interface of 89C2051 single-chip microcomputer after the AM7910 conversion, then carry out preliminary treatment through 89C2051, and are converted to parallel data, and parallel carrier frequency data are sent in the parallel interface of C8051F020;
For the telemetered signal interface, require its input ceiling voltage to be ± 30V, and the A/D converter maximum input voltage is+3V in the sheet of C8051F020 chip microprocessor; Input voltage for+30V has adopted the electric resistance partial pressure attenuator circuit, and the input voltage of+30V is reduced to+the 3V input; And in order to measure-input voltage of 30V, having designed the employing operational amplifier carries out anti-phase amplification, and the input voltage of-30V is reduced to+the 3V input; Two kinds of circuit design are switched positive negative input with the short circuit wire jumping method on same circuit board; Utilize programmable amplifier and related software in the sheet, can realize 0-30V; 0-15V; 0-7.5V surveying work has been simplified in the automatic switchover of gear greatly, and has improved measuring accuracy;
In the remote signals interface, adopt photoelectrical coupler will input remote signals and native system isolation, reduced the impact of external interference for system;
The gsm communication module: the gsm communication module adopts the industrial communication module TC35T of Siemens Company; TC35T has voice, data, short message, four kinds of transmission meanss of FAX; Be operated in GSM-900MHz and the 1800MHz frequency band range; Working power 8-30V; Baud rate is 300bps-115kbps, is the auto-baud setting at 1200bps-115kbps; Data transmit and adopt AT Command Set; RS232 interface and the power interface of standard externally are provided; During application chip microprocessor C8051F020 is mixed standard RS232 serial port chip and directly be connected with cable with the serial port of TC35T, just can use;
The TC35T module must be carried out the initialization setting to TC35T with a computer off-line before use, and parameters is stored among the TC35T;
Because module no longer receives under data communication mode and receives other AT instruction, can only carry out transfer of data; Thereby need to use ＂ +++＂ order is carried out data pattern to the switching of command mode;
In flow chart, CPU is initialization at first; Gather respectively afterwards remote measurement, remote signalling, then the carrier frequency channel data carry out fault distinguishing according to correlation principle; If the discovery system occurs unusual, then start the gsm communication module fault message is sent the background monitoring center that causes.
2. according to telemechanical RTU claimed in claim 1 and Channel Detection design method, it is characterized in that: described telemechanical RTU and Channel Detection design method, can be simultaneously online to a kind ofly interrogating based on GSM Netcom that RTU device and channel carrier are monitored; Each substation RTU uploading data of main website centralized displaying, failure judgement can realize again the substation carried out the multi-functional supervisory control systems such as remote control, remote measurement, remote signalling.
3. according to telemechanical RTU claimed in claim 1 and Channel Detection design method, it is characterized in that: described telemechanical RTU and Channel Detection design method, can realize the on-line monitoring to RTU and passage, have fault judgement, warning, storage, message Presentation Function, terminal unit has remote measurement, remote signalling, remote control and channel failure arbitration functions, utilize the GSM channel to realize the on-line monitoring of RTU and channel, be used for telemechanical RTU and the passage of any type.
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| CN103595492A (en) * | 2013-10-09 | 2014-02-19 | 国家电网公司 | CDT channel fault alarm system |
| CN103595492B (en) * | 2013-10-09 | 2015-11-18 | 国家电网公司 | CDT channel fault alarm system |
| CN103676935A (en) * | 2013-12-09 | 2014-03-26 | 北京航星机器制造有限公司 | Control system and method for monitoring automatic operation of electric control box detecting platform |
| WO2015109736A1 (en) * | 2014-01-21 | 2015-07-30 | 国家电网公司 | Method for intelligently comparing information about primary and standby channels of electric power scheduling automation system |
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| CN111512350A (en) * | 2017-12-22 | 2020-08-07 | 德国电信股份有限公司 | Automated control system for controlling safety functions of remote machines |
| CN112346376A (en) * | 2020-10-09 | 2021-02-09 | 深圳供电局有限公司 | Remote communication entry self-detection system, control method, control device, and storage medium |
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