CN103618232A - Intelligent universal hardware platform for power transformers - Google Patents
Intelligent universal hardware platform for power transformers Download PDFInfo
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- CN103618232A CN103618232A CN201310614644.5A CN201310614644A CN103618232A CN 103618232 A CN103618232 A CN 103618232A CN 201310614644 A CN201310614644 A CN 201310614644A CN 103618232 A CN103618232 A CN 103618232A
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Abstract
The invention belongs to the field of intelligent components of power transformers, and particularly relates to an intelligent universal hardware platform for the power transformers. The intelligent universal hardware platform comprises a case, a power module, a switching value input module, a switching value output module, a direct current value acquisition module, an alternating current value acquisition module, a temperature value acquisition module, a master control module and a high-tension bushing monitoring module, wherein the power module, the switching input module, the switching output module, the direct current value acquisition module, the alternating current value acquisition module, the temperature value acquisition module, the master control module and the high-tension bushing monitoring module are arranged in the case. The intelligent universal hardware platform for the power transformers has the functions of switching value input acquisition, switching value output control, temperature data acquisition, alternating current value acquisition, direct current value acquisition, high-tension bushing condition monitoring, comprehensive analysis and diagnosis and the like, and all the modules are placed in the standard case which is 19-inch 4U high. In practical application, the number of the modules can be freely increased or decreased according to site conditions and requirements of the matched power transformers, so that space and hardware resources are fully utilized. The intelligent universal hardware platform for the power transformers is applicable to intelligentization of the power transformers at all voltage levels.
Description
Technical field
The invention belongs to power transformer intelligent assembly field, relate in particular to a kind of intelligent electric power transformer general hardware platform.
Background technology
Power transformer intelligent assembly is a kind of automatic intelligent electronic equipment set of transformer being carried out to real-time data acquisition and control, can record and store the parameter such as electric current, voltage of step down side, can also pass through communication network, with background monitoring system swap data, the all functions with data processing, state control, status monitoring, realize main website to the remote measurement of transformer, remote signalling, distant control function, realize economy, safety, the reliability service of transformer.
At present; the intelligent assembly of intelligent electric power transformer, generally has following configuration: measurement IED, cooling device are controlled IED, on load tap changer is controlled IED, merge cells, the main IED of monitoring, winding temperature monitoring IED, partial discharge monitoring IED, oil dissolved gas monitoring IED, intrusion ripple monitoring IED, bushing monitoring IED and non electrical quantity protection IED.The functions such as the monitoring of intelligent transformer assembly, measurement, control, metering and protection are all dispersed in each IED, the height of this and intelligent assembly integrated and with the integrated developing direction of body be inconsistent.In addition, each device of this mode is relatively single, isolated and disperse, and in device development process, the utilance of modules and structure is lower, increases the duplication of labour.
Summary of the invention
For above-mentioned problems of the prior art, the invention provides a kind of intelligent electric power transformer general hardware platform, its objective is provide that a kind of integrated level is high, design standard, safe and reliable intelligent electric power transformer general hardware platform.
In order to realize foregoing invention object, the present invention is achieved through the following technical solutions:
Intelligent electric power transformer general hardware platform, comprises power module, switching input module, switching value output module, DC quantity acquisition module, of ac acquisition module, Temperature Quantity acquisition module, main control module and bushing monitoring modular in cabinet and cabinet.
19 inches described of cabinet employings, the standard PC case of 4U, all modules are all connected with case back plate by connector, and can transposition.
Described switching input module comprises: microcontroller and isolating device; External switch amount is received isolating device by DC 24V power supply, after isolating device, is connected with microcontroller input.
Described switching value output module comprises: microcontroller and exit relay; Microcontroller is connected with exit relay by drive circuit, and the output of exit relay is connected with External cable.
Described DC quantity acquisition module comprises: microcontroller, AD sample circuit and operational amplification circuit; Direct current flow need pass through sampling resistor, and direct voltage amount is directly given operational amplification circuit, and operational amplification circuit connects AD sample circuit, and AD sample circuit is connected with microcontroller.
Described of ac acquisition module comprises: microcontroller, AD sample circuit, operational amplification circuit and small current, voltage transformer; Small-sized instrument transformer gathers alternating voltage, electric current, and is transformed into small-signal through operational amplification circuit, sends into the microcontroller being connected after AD sample circuit.
Described Temperature Quantity acquisition module comprises: microcontroller, AD sample circuit, operational amplification circuit and constant-current source circuit; Front end PT100 thermal resistance adopts three-wire system connection to be connected to terminal, then by constant-current source circuit excitation, produces voltage signal, through operational amplification circuit, sends into AD sample circuit the microcontroller being connected.
Described main control module comprises: the microprocessor of ARM kernel, NAND Flash memory, DDR2 SDRAM, fiber optical transceiver; The microprocessor of ARM kernel connects NAND Flash memory, DDR2 SDRAM and fiber optical transceiver by Peripheral Interface, and fiber optical transceiver is connected with electrical secondary system in transformer station.
Described bushing monitoring modular comprises: DSP digital signal processor, synchronous AD sample circuit, operational amplification circuit and sampling resistor; End shield of high-voltage bushing current signal is through sampling resistor, and secondary system voltage signal is directly sent into operational amplification circuit, after synchronous AD sample circuit, gives the DSP being connected digital signal processor.
In described switching input module, switching value output module, DC quantity acquisition module, of ac acquisition module, Temperature Quantity acquisition module, main control module and bushing monitoring modular, all contain microcontroller, by serial communication mode, information is focused in the microprocessor being connected with main control module.
Advantage of the present invention and the beneficial effect producing are:
The invention provides a kind of intelligent electric power transformer general hardware platform, to possess the functions such as switching value input gathers, switching value output control, temperature acquisition, of ac collection, DC quantity collection, bushing status monitoring, comprehensive analyzing and diagnosing, and all modules are placed on to 19 inches, in the high standard PC case of 4U.In actual applications, can increase arbitrarily and delete according to field condition and supporting power transformer demand and the quantity of module make full use of space and hardware resource.The present invention is applicable to the power transformer intellectuality of each electric pressure.
Accompanying drawing explanation
Below in conjunction with accompanying drawing and instantiation, the present invention is described in further details.
Fig. 1 is external structure schematic diagram of the present invention;
Fig. 2 is internal structure schematic diagram of the present invention.
Embodiment
The present invention is a kind of intelligent electric power transformer general hardware platform, as shown in Figure 1, it comprises power module, switching input module, switching value output module, DC quantity acquisition module, of ac acquisition module, Temperature Quantity acquisition module, main control module and the bushing monitoring modular in cabinet and cabinet.19 inches described of cabinet employings, the standard PC case of 4U, all modules are all connected with case back plate by connector, and can transposition.In switching input module of the present invention, switching value output module, DC quantity acquisition module, of ac acquisition module, Temperature Quantity acquisition module, main control module and bushing monitoring modular, all contain microcontroller, by serial communication mode, information is focused in the microprocessor being connected with main control module.
Switching input module of the present invention comprises: microcontroller and isolating device.External switch amount is received isolating device by DC 24V power supply, after isolating device, is connected with microcontroller input.
Described switching value output module comprises: microcontroller and exit relay.Microcontroller is connected with exit relay by drive circuit, and the output of exit relay is connected with External cable.
Described DC quantity acquisition module comprises: microcontroller, AD sample circuit and operational amplification circuit.Direct current flow need pass through sampling resistor, and direct voltage amount is directly given operational amplification circuit, and operational amplification circuit connects AD sample circuit, and AD sample circuit is connected with microcontroller.
Described of ac acquisition module comprises: microcontroller, AD sample circuit, operational amplification circuit and small current, voltage transformer.Small-sized instrument transformer gathers alternating voltage, electric current, and is transformed into small-signal through operational amplification circuit, sends into the microcontroller being connected after AD sample circuit.
Described Temperature Quantity acquisition module comprises: microcontroller, AD sample circuit, operational amplification circuit and constant-current source circuit.Front end PT100 thermal resistance adopts three-wire system connection to be connected to terminal, then by constant-current source circuit excitation, produces voltage signal, through operational amplification circuit, sends into AD sample circuit the microcontroller being connected.
Described main control module comprises: the microprocessor of ARM kernel, NAND Flash memory, DDR2 SDRAM, fiber optical transceiver.The microprocessor of ARM kernel connects NAND Flash memory, DDR2 SDRAM and fiber optical transceiver by Peripheral Interface, and fiber optical transceiver is connected with electrical secondary system in transformer station.
Described bushing monitoring modular comprises: DSP digital signal processor, synchronous AD sample circuit, operational amplification circuit and sampling resistor.End shield of high-voltage bushing current signal is through sampling resistor, and secondary system voltage signal is directly sent into operational amplification circuit, after synchronous AD sample circuit, gives the DSP being connected digital signal processor.
During concrete enforcement, cabinet adopts all aluminium alloy, electromagnetic shielding framework, 19 inches, the installation of 4U high standard rack, rear plug-in module load mode.Functional unit in intelligent electric power transformer general hardware platform in module and the connected mode of modules are as shown in Figure 2.
Power module is by nearby introducing DC 110V or DC 220V power supply, and internal conversion becomes 5V to provide power supply to other modules.
Switching input module connects outputting alarm or the tripping operation contact of Buchholz relay, isallobaric device two sub-assemblies of pressure relief valve on power transformer, and is connected in series outside 24V power supply, in module, after isolating device, is delivering in microcontroller.
Switching value output module connects the coil of outside auxiliary relay, indirectly controls the contactor of cooler or on load tap changer motor drive mechanism, and cooler or on load tap changer are played to the effect of controlling and regulating.In module, the I/O mouth of microcontroller, by magnetic coupling chip, is connected to Darlington diode and drives miniature relay, and return to the output state of miniature relay, guarantees stable output, reliable.
DC quantity acquisition module connects signal transmitting device and transducer, can receive the direct current signal of 4-20mA and 0-5V, such as, fuel level sensor itself can be exported the position that 4-20mA current signal reflects transformer oil in current oil tank of transformer.At the inside modules magnitude of current, by precision resistance, change into voltage signal, and voltage signal directly connects isolation amplifier circuit and AD sample circuit, then deliver to and in microcontroller, carry out data processing.
Of ac acquisition module connects little electric current, the voltage signal of outside instrument transformer output, and inside after the signal conversion of small-sized instrument transformer and operational amplifier, is delivered in microcontroller again.In practical application, be mainly electric current and the magnitude of voltage of electric power loop in monitoring cooler and on load tap changer.
Temperature Quantity acquisition module is the acquisition mode of thermal resistance PT100 mainly for outside, adopts three-wire system connection.PT100, by the excitation of constant-current source circuit in module, produces voltage signal and gives operational amplification circuit and AD employing circuit, is linked in microcontroller.
In above-described module, microcontroller all adopts LPC1768.
Main control module is the maincenter of whole hardware platform, adopts ARM Cortex A8 kernel high-performance technical grade microprocessor chip, and the information of all measurements, monitoring, control, metering and protection all gathers to here, and assess, diagnostic analysis.Fiber port can receive and send MMS, GOOSE and be connected with process layer, wall and station level in SV message signals ，Yu transformer station, and possesses IRIG-B code time adjustment function.
Bushing monitoring modular, from bottom shielding of bushing, introduce leakage current, while connecting system voltage transformer secondary voltage, carry out algorithm process delivering to high performance DSP in module after AD chip synchronized sampling, obtain dielectric dissipation factor, capacitance and leakage current, state to sleeve pipe is assessed, and result is passed to main control module.
Claims (10)
1. intelligent electric power transformer general hardware platform, is characterized in that: comprise power module, switching input module, switching value output module, DC quantity acquisition module, of ac acquisition module, Temperature Quantity acquisition module, main control module and bushing monitoring modular in cabinet and cabinet; Above-mentioned all modules are all connected with case back plate by connector, and can transposition; In described switching input module, switching value output module, DC quantity acquisition module, of ac acquisition module, Temperature Quantity acquisition module, main control module and bushing monitoring modular, all contain microcontroller, by serial communication mode, information is focused in the microprocessor being connected with main control module.
2. intelligent electric power transformer general hardware platform according to claim 1, is characterized in that: 19 inches described of cabinet employings, the standard PC case of 4U.
3. intelligent electric power transformer general hardware platform according to claim 1, is characterized in that: described switching input module comprises: microcontroller and isolating device; External switch amount is received isolating device by DC 24V power supply, after isolating device, is connected with microcontroller input.
4. intelligent electric power transformer general hardware platform according to claim 1, is characterized in that: described switching value output module comprises: microcontroller and exit relay; Microcontroller is connected with exit relay by drive circuit, and the output of exit relay is connected with External cable.
5. intelligent electric power transformer general hardware platform according to claim 1, is characterized in that: described DC quantity acquisition module comprises: microcontroller, AD sample circuit and operational amplification circuit; Direct current flow need pass through sampling resistor, and direct voltage amount is directly given operational amplification circuit, and operational amplification circuit connects AD sample circuit, and AD sample circuit is connected with microcontroller.
6. intelligent electric power transformer general hardware platform according to claim 1, is characterized in that: described of ac acquisition module comprises: microcontroller, AD sample circuit, operational amplification circuit and small current, voltage transformer; Small-sized instrument transformer gathers alternating voltage, electric current, and is transformed into small-signal through operational amplification circuit, sends into the microcontroller being connected after AD sample circuit.
7. intelligent electric power transformer general hardware platform according to claim 1, is characterized in that: described Temperature Quantity acquisition module comprises: microcontroller, AD sample circuit, operational amplification circuit and constant-current source circuit; Front end PT100 thermal resistance adopts three-wire system connection to be connected to terminal, then by constant-current source circuit excitation, produces voltage signal, through operational amplification circuit, sends into AD sample circuit the microcontroller being connected.
8. intelligent electric power transformer general hardware platform according to claim 1, is characterized in that: described main control module comprises: the microprocessor of ARM kernel, NAND Flash memory, DDR2 SDRAM, fiber optical transceiver; The microprocessor of ARM kernel connects NAND Flash memory, DDR2 SDRAM and fiber optical transceiver by Peripheral Interface, and fiber optical transceiver is connected with electrical secondary system in transformer station.
9. intelligent electric power transformer general hardware platform according to claim 1, is characterized in that: described bushing monitoring modular comprises: DSP digital signal processor, synchronous AD sample circuit, operational amplification circuit and sampling resistor; End shield of high-voltage bushing current signal is through sampling resistor, and secondary system voltage signal is directly sent into operational amplification circuit, after synchronous AD sample circuit, gives the DSP being connected digital signal processor.
10. intelligent electric power transformer general hardware platform according to claim 1, is characterized in that: described cabinet adopts all aluminium alloy, electromagnetic shielding framework, 19 inches, the installation of 4U high standard rack, rear plug-in module load mode; Power module is by nearby introducing DC 110V or DC 220V power supply, and internal conversion becomes 5V to provide power supply to other modules;
Switching input module connects outputting alarm or the tripping operation contact of Buchholz relay, isallobaric device two sub-assemblies of pressure relief valve on power transformer, and is connected in series outside 24V power supply, in module, is delivering in microcontroller after isolating device;
Switching value output module connects the coil of outside auxiliary relay, indirectly controls the contactor of cooler or on load tap changer motor drive mechanism, and cooler or on load tap changer are played to the effect of controlling and regulating; In module, the I/O mouth of microcontroller, by magnetic coupling chip, is connected to Darlington diode and drives miniature relay, and returns to the output state of miniature relay;
DC quantity acquisition module connects signal transmitting device and transducer, can receive the direct current signal of 4-20mA and 0-5V; At the inside modules magnitude of current, by precision resistance, change into voltage signal, and voltage signal directly connects isolation amplifier circuit and AD sample circuit, then deliver to and in microcontroller, carry out data processing;
Of ac acquisition module connects little electric current, the voltage signal of outside instrument transformer output, and inside after the signal conversion of small-sized instrument transformer and operational amplifier, is delivered in microcontroller again;
Temperature Quantity acquisition module is the acquisition mode of thermal resistance PT100 mainly for outside, adopts three-wire system connection; PT100, by the excitation of constant-current source circuit in module, produces voltage signal and gives operational amplification circuit and AD employing circuit, is linked in microcontroller;
In above-described module, microcontroller all adopts LPC1768;
Main control module is the maincenter of whole hardware platform, adopts ARM Cortex A8 kernel high-performance technical grade microprocessor chip, and the information of all measurements, monitoring, control, metering and protection all gathers to here, and assess, diagnostic analysis; Fiber port can receive and send MMS, GOOSE and be connected with process layer, wall and station level in SV message signals ，Yu transformer station, and possesses IRIG-B code time adjustment function;
Bushing monitoring modular, from bottom shielding of bushing, introduce leakage current, while connecting system voltage transformer secondary voltage, carry out algorithm process delivering to high performance DSP in module after AD chip synchronized sampling, obtain dielectric dissipation factor, capacitance and leakage current, state to sleeve pipe is assessed, and result is passed to main control module.
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104267293A (en) * | 2014-10-17 | 2015-01-07 | 国家电网公司 | High-voltage testing device and method |
| CN104283316A (en) * | 2014-10-20 | 2015-01-14 | 国家电网公司 | Method for improving environment adaptive capacity of intelligent assembly |
| CN105655975A (en) * | 2016-02-22 | 2016-06-08 | 国家电网公司 | Protective device applied to rural distribution network distribution transformer |
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| JP2001103667A (en) * | 1999-09-30 | 2001-04-13 | Toshiba Corp | Monitoring-controlling device |
| CN202068239U (en) * | 2011-06-07 | 2011-12-07 | 上海思源弘瑞自动化有限公司 | Intelligent component of transformer body |
| CN102957208A (en) * | 2012-09-19 | 2013-03-06 | 北开电气集团有限公司 | Intelligent monitoring device of power distribution transformer and control method thereof |
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2013
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Patent Citations (4)
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| JPH11164430A (en) * | 1997-11-28 | 1999-06-18 | Toshiba Corp | Transformating equipment monitor and control panel |
| JP2001103667A (en) * | 1999-09-30 | 2001-04-13 | Toshiba Corp | Monitoring-controlling device |
| CN202068239U (en) * | 2011-06-07 | 2011-12-07 | 上海思源弘瑞自动化有限公司 | Intelligent component of transformer body |
| CN102957208A (en) * | 2012-09-19 | 2013-03-06 | 北开电气集团有限公司 | Intelligent monitoring device of power distribution transformer and control method thereof |
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104267293A (en) * | 2014-10-17 | 2015-01-07 | 国家电网公司 | High-voltage testing device and method |
| CN104267293B (en) * | 2014-10-17 | 2017-06-16 | 国家电网公司 | High-voltage testing equipment and method |
| CN104283316A (en) * | 2014-10-20 | 2015-01-14 | 国家电网公司 | Method for improving environment adaptive capacity of intelligent assembly |
| CN104283316B (en) * | 2014-10-20 | 2016-09-21 | 国家电网公司 | A kind of method improving intelligent assembly adaptive capacity to environment |
| CN105655975A (en) * | 2016-02-22 | 2016-06-08 | 国家电网公司 | Protective device applied to rural distribution network distribution transformer |
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