CN102157982B - Intelligent terminal for power transformer - Google Patents
Intelligent terminal for power transformer Download PDFInfo
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Abstract
The invention discloses an intelligent terminal for a power transformer, which comprises all function modules, wherein all function modules are connected with a CPU (Central Processing Unit) module through dual CAN (Controller Area Network) buses located on a bus backplane. The intelligent terminal is characterized in that a DSP (Digital Signal Processor) and a plate address dial switch are arranged on each intelligent module, and the CPU module downloads a file with module configuration information to the CPU module by arrangement of a configuration module and automatically recognizes each function module. In the invention, intelligent modules with different transmission requirements are divided into two classes and are connected with the CPU module through the dual CAN buses, high-speed real-time transmission of information is realized, and the information acquisition of the transformer body, the intelligent control of a cooling system and the control and non-electrical-quantity protection function of an on-load tapping switch are completed.
Description
Technical field
The invention belongs to electronic information technical field, patent of the present invention relates to the novel electric power intelligent transformer terminal based on GOOSE transmission technology of a kind of 110kV of being applicable to and above more precisely.
Background technology
Intelligent terminal for power transformer belongs to the important key equipment of intelligent substation link in intelligent grid construction.Primary equipment intellectuality is the outstanding feature that intelligent substation is different from traditional transformer station.The observing and controlling of traditional Function-oriented, protective device are also progressively to OO intelligent assembly future development; intelligent terminal is the process layer devices of intelligent assembly; with primary equipment contact the tightst, its developing direction be realize integrated, structure-integrated towards the function of the measurement of force device, control and protection function, gather digitlization and control networking.The in-situ digitalization collection of primary equipment requires information acquisition terminal to transfer on the spot, is arranged near the outdoor cabinet of primary equipment, converts on the spot signal to digital signal, is transferred to wall or station level equipment by fiber optic network.Control networking and be exactly the control that by network mode, control command is handed down to near control of intelligent terminal primary equipment and realizes primary equipment.Digital collection and networking control are used optical fiber communication mode to replace traditional cable control mode, have saved a large amount of cable input costs, have improved shared rate and the standardization of information simultaneously.Integrated and the structure-integrated high efficiency of transmission that is designed with the information of being beneficial to of function, reduce screen cabinet quantity, save the cost of equipment, the debugging of simplified apparatus and maintenance, reduce the floor space of transformer station, improves the intelligent degree of equipment.Intelligent terminal for power transformer is exactly the intelligent substation equipment that function is integrated, structure-integrated, gather digitlization and control networked Characteristics that has for 110kV and above design of transformer under this technical background.The development of novel electric power intelligent transformer terminal has adopted following technology:
Strictly follow IEC61850 standard: IEC61850 standard is that the communication in intelligent substation and between transformer station and scheduling has been formulated unified standard and mechanism, be the important evidence of interoperability between exchange between measurement equipment, equipment and miscellaneous equipment, its content has mainly comprised Intelligent terminal data modeling, network architecture, communication mechanism and standard etc.
The process layer GOOSE communication technology: power transformation station equipment is divided into three layers by IEC61850 standard, process layer, wall and station level, intelligent terminal belongs to process layer devices.Intelligent terminal and external information interaction are based on process layer communication network, adopt GOOSE (towards the transformer substation case of general object) communication mode, GOOSE communication mode is very high to requirement of real-time, the communication delay of IEC61850 standard regulation GOOSE signal should be less than 4ms, be mainly used in transmitting interval block signal, believe and also can be used for transmitting some remote measurements, remote signalling information by trip signal in real time.
IEC61588 to time technology: IEC61588 be the accurate clock synchronization protocol with the wonderful level of sub-micro synchronizing function that is applied to Industry Control and fields of measurement.IEC61588 to time process do not rely on GPS, be not subject to external interference, but by network communication mode, its to time process comprise two steps: (1) determines the equipment that master clock is provided in network; (2) by calculating master-salve clock side-play amount and network delay correction from equipment clock.
Document one " power transformer comprehensive intelligent assembly " (Chinese Patent Application No. 201010543538.9) has disclosed a kind of collection and analytical equipment of transformer panorama information, be referred to as the main IED of intelligent transformer assembly, be equivalent to people's brain, complete collection, analysis and the condition diagnosing function of transformer information.
The intelligent transformer scheme proposing in document two " high-tension apparatus intellectualized technology guide rule " by the measurement function of transformer body, cooling system control function, on load tap changer control function and non electrical quantity defencive function respectively by four independently device realize.
Summary of the invention
Technical problem to be solved by this invention is to provide the type Intelligent terminal for power transformer of a kind of 110kV of being applicable to and above, information gathering site, control networking, the function that can realize transformer equipment are integrated, cost-saving, the resource-sharing and the standardization that improve information simultaneously.
For solving the problems of the technologies described above, the present invention takes following technical scheme to realize:
A kind of Intelligent terminal for power transformer, comprise each function module, each function module is connected with CPU module by the two CAN network bus that are positioned in bus backplane, it is characterized in that: on each intelligent modular unit, be provided with dsp processor and plate address toggle switch, CPU module configures configuration module by device and will under the file with module configuration information, install to CPU module, CPU module is the each function module of identification automatically, and the quantity of each module can be according to on-the-spot increase in demand or minimizing.
Aforesaid Intelligent terminal for power transformer, is characterized in that: described each function module comprises that power supply module, man-machine interface module, intelligent small-signal DC quantity collection module, intelligent AC amount collection module, intelligent switch quantity collection module, intelligence are outputed module, intelligence is opened into module, non electrical quantity defencive function module and operation circuit module.
Aforesaid Intelligent terminal for power transformer; it is characterized in that: the intelligence that requirement of real-time is higher outputs module and non electrical quantity defencive function module carries out information interaction by CANB separately, intelligence is opened into module, intelligent AC amount collection module, intelligent small-signal DC quantity and is gathered module and carry out information interaction by CANA and CPU module.
Aforesaid Intelligent terminal for power transformer; it is characterized in that: described power supply module is outputed module with man-machine interface module, CPU module, intelligent small-signal DC quantity collection module, intelligent AC amount collection module, intelligent switch quantity collection module, intelligence respectively, non electrical quantity defencive function module is connected with operation circuit module; support the input of 88VDC～264VDC wide region; output 5V and 24V DC power supply, generator alarm simultaneously and the empty output signal node of device locking.
Aforesaid Intelligent terminal for power transformer, is characterized in that: described man-machine interface module adopts PIC processor, by carrying out information interaction between serial communication mode and CPU module, realizes LED and liquid crystal display, the functions such as keyboard operation.
Aforesaid Intelligent terminal for power transformer, it is characterized in that: described CPU module adopts the high-performance POWERPC processor while supporting 1588 pairs, possess 10 100M fiber optic Ethernet interfaces for implementation procedure layer GOOSE communication and 1588 network time adjustment functions, and target transformer body information, according to IEC61850 standard unified Modeling, is passed to bay device and is completed cooling system intelligent control function with GOOSE message mode will be with time.
Aforesaid Intelligent terminal for power transformer, it is characterized in that: described intelligent small-signal DC quantity gathers module and is connected with temperature of oil in transformer, oil level, ambient temperature, humidity sensor, gather 0-5V or 4-20mA DC quantity signal, realize the collection of temperature of oil in transformer, oil level, ambient temperature, humidity, and signal is passed to CPU module by internal bus.
Aforesaid Intelligent terminal for power transformer, it is characterized in that: described intelligent AC amount gathers module and can be used for the operating voltage of cooling system fan and oil pump and the collection of current signal, realize its Stateful Inspection, and signal is passed to CPU module by internal bus.
Aforesaid Intelligent terminal for power transformer, it is characterized in that: described intelligent switch quantity gathers module through light-coupled isolation, gather DC110V or DC220V DC quantity switching signal, realize the signals collecting such as fan opening, gear, oil flow relay state, and signal is passed to CPU module by internal bus.
Aforesaid Intelligent terminal for power transformer, it is characterized in that: described intelligence is outputed module and adopted hermetically sealed entrance relay, realize cooling system control and gear and regulate the relay output function of controlling, can accept the control command that CPU module sends by internal bus.
Aforesaid Intelligent terminal for power transformer, is characterized in that: described non electrical quantity defencive function module is used for collection and the tripping operation output function of Buchholz relay signal, pressure release signal, overtemperature signal, and sends trip signal to CPU module.
Aforesaid Intelligent terminal for power transformer; it is characterized in that: described operation circuit module has a tripping operation input contact and 12 tripping operation output contacts; protect the tripping operation output contact of module to access this module input contact non electrical quantity, can realize the synchronous trip avoidance function to multiple objects.
The present invention concentrates design by all measurements relevant to transformer body, cooling system and on load tap changer Based Intelligent Control and non electrical quantity defencive function first; save equipment cost and screen cabinet installing space; simplify network configuration, embodied very high integrated level and advance.Carry out information interaction according to IEC61850 standard and bay device; support IEC61588 time adjustment function; its measurement, control and non electrical quantity defencive function and module quantity can need flexible configuration according to scene; meet the intelligentized demand of transformer equipment in intelligent substation construction; internal communication adopts dual CAN bus mode simultaneously, has guaranteed the real-time of network tripping operation.
Accompanying drawing explanation
Fig. 1 is the overall structure figure of Intelligent terminal for power transformer of the present invention;
Fig. 2 is that Intelligent terminal for power transformer of the present invention is combined with the main IED of intelligent transformer assembly and is realized the schematic diagram of cooling system intelligent control function;
Fig. 3 is that Intelligent terminal for power transformer of the present invention coordinates with the main IED of intelligent transformer assembly the schematic diagram of realizing on load tap changer intelligent control function;
Fig. 4 is Intelligent terminal for power transformer non electrical quantity defencive function schematic diagram of the present invention;
Fig. 5 is that Intelligent terminal for power transformer measurement function of the present invention is realized schematic diagram;
Embodiment
Below embodiment, be a preferred embodiment of the present invention, comprised the method that adopts intelligent transformer terminal of the present invention, realizes intelligent transformer in conjunction with miscellaneous equipment and system.Other features, objects and advantages of the present invention also can be found out from the explanation of embodiment and accompanying drawing.
The overall structure of paper Intelligent terminal for power transformer of the present invention; from accompanying drawing 1, can see that Intelligent terminal for power transformer of the present invention adopts modular construction, comprise that power supply module, man-machine interface module, intelligent small-signal DC quantity collection module, intelligent AC amount collection module, intelligent switch quantity collection module, intelligence are outputed module, intelligence is opened into module, non electrical quantity defencive function module, operation circuit module, CPU module.CPU module carries out information interaction by dual CAN bus and other intelligent modular unit; output with non electrical quantity defencive function module and carry out information interaction by CANB separately for the higher intelligence of requirement of real-time, intelligence is opened into module, intelligent AC amount module, intelligent DC amount collection module and is carried out information interaction by CANA and CPU module.On each intelligent modular unit, be designed with address toggle switch, realize the automatic identification of intelligent modular unit by dial-up address and device configuration configuration instrument mode, therefore the quantity of each function module can flexible configuration, on-the-spot application is very flexible, safeguards also very convenient.
CPU module support IRIG-B code to time and two kinds of IEC61588 to time signal input, by two kinds to time information arbitrate and resolve to message add pulse per second (PPS) (1PPS) or point pulse (1PPM) mode to each intelligent modular unit to time, as shown in Figure 1.Each intelligent modular unit can be stamped markers by the information of collection or action situation the very first time, is convenient to follow-up analysis and application.In Fig. 1: POW-power supply module, AIM-intelligence small-signal DC quantity gathers module, and BIM-intelligent switch quantity gathers module, and DLM-intelligent AC amount gathers module, and BOT-intelligence is outputed module, FDL-non electrical quantity defencive function module, CDM-operation circuit module.
CPU module is designed with 10 100M fiber optic network interfaces, and all accessible process layer GOOSE network, also can realize point-to-point communication with protection, measurement and control unit.
Power supply module provides work and signal power source to other module except operation circuit and man-machine interface module by bus backplane mode.
Between man-machine interface module and CPU module, adopt serial communication mode, the LED that has realized the signal such as non-electric charge quantity signalling alarm or non-electric charge quantity signalling action shows, and whole the ordering of demonstration, control and definite value of remote measurement, remote signalling, remote information.
Fig. 2 is intelligent terminal cooling system intelligent control function implementation schematic diagram, intelligent DC amount Collection module (AIM) gathers oil temperature and the ambient temperature signal of 4-20mA, and give CPU module by CANA bus by metrical information, intelligent AC amount gathers module (DLM) and gathers the operating state of cooling fan and oil pump and give CPU module by CANA, the each side information on load of main transformer that CPU module obtains by the main IED of GOOSE mode receiving transformer intelligent assembly, the above-mentioned information that comprehensive AIM and DLM gather forms the control strategy of transformer cooling system, send control command and realize the automatic switching function of cooling fan by CANB bus.
Fig. 3 is intelligent terminal on load tap changer intelligent control function implementation schematic diagram, the control of considering on load tap changer need to coordinate with capacitor switching, need carry out information interaction with the VQC system on backstage therefore there is the Intelligent Control Strategy of carrying sectional switch, gather three side voltages simultaneously, in the main IED of intelligent transformer assembly, form, the order of transferring the files sends to intelligent terminal in GOOSE mode, intelligent terminal receives to be issued intelligence by CANB bus after order and outputs module (BOT), realizes the adjusting of gear.
Fig. 4 is intelligent terminal non electrical quantity defencive function implementation schematic diagram, and intelligent non electrical quantity function module is designed with the input of 3 groups of non-electric charge quantity signallings and trip signal output interface, when non electrical quantity number is during more than 3, and configurable polylith non electrical quantity function module.Non electrical quantity function module can coordinate with operation circuit module, by the heavily moving input signal of tripping operation output signal access operation loop module, can realize the synchronous trip avoidance function of multiple objects.Intelligent non electrical quantity function module is given CPU module by actuating signal by inner CANB bus simultaneously, and CPU module is given other equipment by GOOSE mode by information according to IEC61850 standard.
Fig. 5 is the schematic diagram that intelligent terminal is realized measurement function, AIM module is realized the measurement of DC quantity small-signal, as oil temperature, winding temperature, ambient temperature etc., BIN module is realized the measurement of switching value signal, as gear, the heavy gas of pressure regulation, pressure regulation earth pressure release, cooler full cut-off, pressure regulation oil temperature are abnormal etc., and DLM module is realized the collection of of ac signal, as voltage, the electric current etc. of cooling fan work.Each module quantity that gathers can increase or reduce according to on-the-spot needs.Each module is given CPU module by CANA bus by information by measuring-signal, and CPU module is given miscellaneous equipment by information according to IEC61850 standard.
Intelligent terminal of the present invention possesses following characteristics:
1, transformer non-electricity defencive function, body measurement function, cooling system Based Intelligent Control, on-load voltage regulation control function are merged to design, functional integration is high, has 10 road Guang Kou, meets the access of multiple objects, adopt the whole crate plug-in unit fabricated structure of 4U, compact conformation;
2, based on GOOSE Real-time Communication Technology, to carry out data modeling and communicate by letter according to IEC61850 standard, standardization level is high, and interoperability and interchangeability are good;
3, support simultaneously IEC61588 network to time and IRIG-B function, to time mode flexible, to time precision high;
4, hardware and software all adopts modular design method, and function and capacity configuration are flexible, is easy to expansion and safeguards, intercommunication adopts two CAN network bus, meets tripping operation and waits at a high speed transmission demand in real time;
5, device antijamming capability is strong, can be arranged near the outdoor cabinet of transformer.
The present invention is illustrated according to the preferred embodiment, should be appreciated that but above-described embodiment does not limit the present invention in any form, and all employings are equal to replaces or technical scheme that the form of equivalent transformation obtains, within all dropping on protection scope of the present invention.
Claims (1)
1. an Intelligent terminal for power transformer, comprise each function module, each function module is connected with CPU module by the two CAN network bus that are positioned in bus backplane, it is characterized in that: on each function module, be provided with dsp processor and plate address toggle switch, CPU module configures configuration module by device and will download and be installed to CPU module with the file of module configuration information, CPU module is the each function module of identification automatically, described each function module comprises power supply module, man-machine interface module, intelligence small-signal DC quantity gathers module, intelligent AC amount gathers module, intelligent switch quantity gathers module, intelligence is outputed module, intelligence is opened into module, non electrical quantity defencive function module and operation circuit module, the intelligence that requirement of real-time is higher outputs module and non electrical quantity defencive function module carries out information interaction by the CANB bus in two CAN network bus separately, intelligence is opened into module, intelligent AC amount gathers module, intelligence small-signal DC quantity gathers module and carries out information interaction by the CANA bus in two CAN network bus and CPU module,
Described power supply module is outputed module with man-machine interface module, CPU module, intelligent small-signal DC quantity collection module, intelligent AC amount collection module, intelligent switch quantity collection module, intelligence respectively, non electrical quantity defencive function module is connected with operation circuit module, support the input of 88VDC～264VDC wide region, output 5V and 24V DC power supply, generator alarm simultaneously and the empty output signal node of device locking;
Described man-machine interface module adopts PIC processor, by carrying out information interaction between serial communication mode and CPU module, realizes LED and liquid crystal display, keyboard operation function;
Described CPU module adopts the high-performance POWERPC processor while supporting 1588 pairs, possess 10 100M fiber optic Ethernet interfaces for implementation procedure layer GOOSE communication and 1588 network time adjustment functions, and target transformer body information, according to IEC61850 standard unified Modeling, is passed to bay device and is completed cooling system intelligent control function with GOOSE message mode will be with time;
Described intelligent small-signal DC quantity gathers module and is connected with temperature of oil in transformer, oil level, ambient temperature, humidity sensor, gather 0-5V or 4-20mA DC quantity signal, realize the collection of temperature of oil in transformer, oil level, ambient temperature, humidity, and signal is passed to CPU module by two CAN network bus;
Described intelligent AC amount gathers module for cooling system fan and the operating voltage of oil pump and the collection of current signal, realizes its Stateful Inspection, and signal is passed to CPU module by two CAN network bus;
Described intelligent switch quantity gathers module through light-coupled isolation, gathers DC110V or DC220V DC quantity switching signal, realizes fan opening, gear, oil flow relay state signal collecting, and signal is passed to CPU module by two CAN network bus;
Described intelligence is outputed module and is adopted hermetically sealed entrance relay, realizes cooling system control and gear and regulates the relay output function of controlling, and can accept the control command that CPU module sends by two CAN network bus;
Described non electrical quantity defencive function module is used for collection and the tripping operation output function of Buchholz relay signal, pressure release signal, overtemperature signal, and sends trip signal to CPU module;
Described operation circuit module has a tripping operation input contact and 12 tripping operation output contacts, by the tripping operation output contact access operation loop module input contact of non electrical quantity defencive function module, realizes the synchronous trip avoidance function to multiple objects.
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Families Citing this family (11)
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| CN102412567B (en) * | 2011-10-17 | 2014-04-09 | 费江海 | Synthetical protector for controller area network (CAN) power system and using method thereof |
| CN102769337B (en) * | 2012-07-09 | 2015-12-02 | 中国电力科学研究院 | A kind of protection measurement and control integration device |
| CN102957209A (en) * | 2012-11-06 | 2013-03-06 | 浙江省电力公司 | Integrated measurement and control device of intelligent transformer substation |
| CN103206984A (en) * | 2013-03-26 | 2013-07-17 | 国家电网公司 | Intelligent component for oil-immersed transformer |
| CN103513569A (en) * | 2013-09-17 | 2014-01-15 | 国家电网公司 | Method for synchronizing redundant time of intelligent substation |
| CN103543353B (en) * | 2013-09-24 | 2016-04-13 | 许继集团有限公司 | Direct current acquisition method under a kind of wide temperature environment |
| CN103647262A (en) * | 2013-10-25 | 2014-03-19 | 北京四方继保自动化股份有限公司 | In-situ placement type miniature intelligent relay protection device |
| CN103592540A (en) * | 2013-11-12 | 2014-02-19 | 国家电网公司 | High-accuracy direct current collecting method under wide-temperature environment |
| CN104953710A (en) * | 2015-06-16 | 2015-09-30 | 深圳供电局有限公司 | Intelligent integrated sampling device, intelligent distribution network terminal and distribution network |
| CN106646080A (en) * | 2016-12-09 | 2017-05-10 | 广东佛电电器有限公司 | Intelligent monitoring terminal for low-voltage power grid |
| CN107069956A (en) * | 2017-03-14 | 2017-08-18 | 江苏骏龙光电科技股份有限公司 | A kind of cabinet type comprehensive power transformer intelligent assembly |
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