CN104362589A - Sectionalized protection device for high overload distribution transformer - Google Patents
Sectionalized protection device for high overload distribution transformer Download PDFInfo
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- CN104362589A CN104362589A CN201410691940.XA CN201410691940A CN104362589A CN 104362589 A CN104362589 A CN 104362589A CN 201410691940 A CN201410691940 A CN 201410691940A CN 104362589 A CN104362589 A CN 104362589A
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- distribution transformer
- protection device
- high overload
- base plate
- overload distribution
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Abstract
The invention relates to a sectionalized protection device for a high overload distribution transformer. Compared with the prior art, the defect that a protection device for the high overload distribution transformer is not available is overcome. The sectionalized protection device comprises a communication module (9), an alternating current sampling circuit (6) and an RS-485 interface (7). The RS-485 interface (7) is connected with a branch wire outlet switch A (71) and a branch wire outlet switch B (72). The alternating current sampling circuit (6), the RS-485 interface (7) and the communication module (9) are connected with serial ports of a bottom board (5) respectively, and the bottom board (5) is connected with a serial port of an ARM9 core board (4). The sectionalized protection device can effectively solve the problem that the distribution transformer is burnt down due to the fact that the high overload distribution transformer is in a high-load state for a long time.
Description
Technical field
The present invention relates to high overload distribution transformer technical field, specifically a kind of sectionalised protection device for high overload distribution transformer.
Background technology
In recent years, along with the improvement of economic condition, rural electricity consumption client starts to add the high-power electric appliances such as air-conditioning, electric heater, electric rice cooker in a large number.Rural area migrant worker is daily to stay out, the daily load in platform district, rural area is less than normal, Spring Festival is gone home because migrant worker returns to one's native place in a large number the New Year, the high-power heating system such as air-conditioning, electric heater starts to concentrate operation, causing platform district load significantly to rise, often there is the situation of heavy duty, overload in distribution transformer.For this phenomenon, power supply unit is solved by high overload distribution transforming linked network, installs high overload distribution transformer.High overload distribution transformer there will be higher load condition when Long-Time Service, finally causes Distribution Transformer Burning, and at present not for the safeguard measure of high overload distribution transformer.How to develop a kind of protective device for high overload distribution transformer and become the technical problem being badly in need of solving.
Summary of the invention
The object of the invention is, in order to the defect solved not for high overload distribution transformer protection device in prior art, to provide a kind of sectionalised protection device for high overload distribution transformer to solve the problems referred to above.
To achieve these goals, technical scheme of the present invention is as follows:
A kind of sectionalised protection device for high overload distribution transformer; comprise base plate and ARM9 core board; also comprise communication module, alternating current sampling circuit and RS-485 interface; described RS-485 interface is connected with and branches out wiretap A and branch out wiretap B; described alternating current sampling circuit, RS-485 interface are connected with the serial port of base plate respectively with communication module, and base plate is connected with the serial port of ARM9 core board.
Described alternating current sampling circuit comprises PT and CT, PT with CT is connected with integrated operational amplifier respectively, and described integrated operational amplifier is connected with MCU by A-D converter, and described MCU is connected with the serial port of base plate.
Also comprise power supply, guidance panel, network interface and UART, described power supply is connected with base plate, and described guidance panel, network interface and UART are connected with the serial port of ARM9 core board respectively.
Described communication module is GPRS module.
Described base plate adopts model to be the PHY chip of DM9161AE, and described ARM9 core board employing model is the ARM926EJ-S chip of AT91SAM9260.
The model of described integrated operational amplifier is LM124, and the model of described MCU is MCF52259, and the model of described A-D converter is TLC3578IW.
beneficial effect
A kind of sectionalised protection device for high overload distribution transformer of the present invention, compared with prior art can effectively avoid high overload distribution transformer to cause the problem of Distribution Transformer Burning because being in higher load condition time long.The load data of Real-Time Monitoring high overload distribution transformer of the present invention and running time; when after the duration that transformer exceedes setting running time; sectionalised protection device carries out increasing according to transformer load state, load shedding, coordinates to avoid high capacity transformer causes burning and can not effectively playing because being in low load the efficiency of high capacity transformer problem because being in higher load condition time long largely.Have the advantages that project organization is simple, powerful, cost is comparatively cheap, be beneficial to and promote on a large scale.
accompanying drawing explanation
Fig. 1 is circuit structure schematic diagram of the present invention;
Fig. 2 is the circuit structure schematic diagram of alternating current sampling circuit in the present invention;
Wherein, 1-guidance panel, 2-network interface, 3-UART, 4-ARM9 core board, 5-base plate, 6-alternating current sampling circuit, 7-RS-485 interface, 8-power supply, 9-communication module, 61-PT, 62-CT, 63-integrated operational amplifier, 64-A-D converter, 65-MCU, 71-branch out wiretap A, 72-and branch out wiretap B.
Embodiment
For making to have a better understanding and awareness architectural feature of the present invention and effect of reaching, coordinating detailed description in order to preferred embodiment and accompanying drawing, being described as follows:
As shown in Figure 1, a kind of sectionalised protection device for high overload distribution transformer of the present invention, comprise base plate 5 and ARM9 core board 4, base plate 5 is connected with the serial port of ARM9 core board 4, and base plate 5 is responsible for transfer of data and control.ARM9 core board 4 is responsible for mathematical logic and is judged; ARM9 core board 4 is responsible for making comparisons and Logic judgment with the electric current arranged, electric current, load definite value; after protective device Real-time Monitoring Data exceedes and arranges definite value and delay time; Load adjustment instruction is assigned to RS-485 interface 7 by ARM9 core board 4; generate event of failure record, RS-485 interface 7 performs the excision operation of fractional load according to the logical order that ARM9 core board 4 sends simultaneously.RS-485 interface 7 is connected with the serial port of base plate 5, and RS-485 interface 7 plays the effect of controlling brancher, RS-485 interface 7 is connected with and branches out wiretap A71 and branch out wiretap B72.Branch out wiretap A71 and branch out the outlet switch that wiretap B72 is branch path, then having many branch roads during practical application, controlled the closed and disconnected of many branch roads by RS-485 interface 7.Communication module 9 is connected with the serial port of base plate 5, and communication module 9 is for carrying out data communication, and it can select GPRS or 3G module.If GPRS module, then can select SIM900S module, GPRS signal can be converted to UART signal transmission to base plate 5 by SIM900S module, thus reach ARM9 core board 4.
Alternating current sampling circuit 6 is responsible for voltage, electric current, the power factor data of Real-time Collection high overload distribution transformer, alternating current sampling circuit 6 is connected with the serial port of base plate 5, in actual applications, alternating current sampling circuit 6 is arranged on end of incoming cables in JP cabinet, gather the three-phase voltage of end of incoming cables and three-phase current, then the data collected are reached ARM9 core board 4 by base plate 5 carry out numerical value judgement.As shown in Figure 2, alternating current sampling circuit 6 comprises PT61 and CT62, and PT61 is for gathering three-phase voltage, and CT62 is for gathering three-phase current.PT61 with CT62 is connected with integrated operational amplifier 63 respectively, and the model of integrated operational amplifier 63 is LM124, the electric current collected, voltage data is carried out the amplification of analog quantity.Integrated operational amplifier 63 is connected with MCU65 by A-D converter 64, and A-D converter 64 adopts the TLC3578IW of TI company, and MCU65 selects model to be MCF52259.MCU65 is connected with the serial port of base plate 5, the voltage collected by PT61 and CT62, current data, after integrated operational amplifier 63 amplifies, meet at A-D converter 64 carry out simulating the conversion to numeral, digital signal after conversion passes to base plate 5 by MCU65 again, and base plate 5 is given ARM9 core board 4 and carried out voting logic judgement.
Whole device is powered by power supply 8, and power supply 8 is connected with base plate 5.Power supply 8 adopts three-phase four-wire system AC power (UA, UB, UC, UN) to provide power supply to input, and exports as three-way direct current power supply: main power source 12V, is respectively carrier wave 12V and communicates with 485 12V.Conveniently operation and later maintenance, can also comprise guidance panel 1, network interface 2 and UART3.Guidance panel 1, network interface 2 are connected with the serial port of ARM9 core board 4 respectively with UART3, and guidance panel 1 is man machine operation interface, directly can carry out Operation and Maintenance.Network interface 2 and UART3 are remote maintenance platform, upkeep operation that can be convenient.Base plate 5 can adopt model to be the PHY chip of DM9161AE.ARM9 core board 4 can adopt model to be the ARM926EJ-S chip of AT91SAM9260, and it supports six road serial ports, increases Kuo Zhi 10 road serial ports, have the SDRAM of 64MB, maximum support 1GB NandFlash by ST16C55X family chip.
When reality uses, alternating current sampling circuit 6 is arranged in intelligent JP cabinet, is obtained the service data of high overload distribution transformer by alternating current sampling circuit 6, and real time record and statistical analysis.If ARM9 core board 4 judges that the data that alternating current sampling circuit 6 collects exceed threshold value, namely peak load operation exceeds schedule time, then base plate 5 by RS-485 interface 7 control branch out wiretap A71 or branch out wiretap B72(2 road or 3 tunnels) branch out wiretap separating brake, breaking part load.When alternating current sampling circuit 6 detects lower than threshold value, namely load is stabilized to range of operation again, then branches out by base plate 5 control section the operation that wiretap combined floodgate recovers load.Larger specific electric load is gone out for avoiding cutting off; the sectionalised protection device of high overload distribution transformer can also be analyzed each road outlet load condition before disconnection load; thus judging to excise which road, to go out specific electric load be loss reduction to load; thus both ensure that the safe operation of transformer, also ensure that the continuity of load operation.
More than show and describe general principle of the present invention, principal character and advantage of the present invention.The technical staff of the industry should understand; the present invention is not restricted to the described embodiments; the just principle of the present invention described in above-described embodiment and specification; the present invention also has various changes and modifications without departing from the spirit and scope of the present invention, and these changes and improvements all fall in claimed scope of the present invention.The protection range of application claims is defined by appending claims and equivalent thereof.
Claims (6)
1. the sectionalised protection device for high overload distribution transformer; comprise base plate (5) and ARM9 core board (4); it is characterized in that: also comprise communication module (9), alternating current sampling circuit (6) and RS-485 interface (7); described RS-485 interface (7) is connected with and branches out wiretap A(71) and branch out wiretap B(72); described alternating current sampling circuit (6), RS-485 interface (7) are connected with the serial port of base plate (5) respectively with communication module (9), and base plate (5) is connected with the serial port of ARM9 core board (4).
2. a kind of sectionalised protection device for high overload distribution transformer according to claim 1; it is characterized in that: described alternating current sampling circuit (6) comprises PT(61) and CT(62); PT(61) with CT(62) be connected with integrated operational amplifier (63) respectively; described integrated operational amplifier (63) is by A-D converter (64) and MCU(65) be connected, described MCU(65) be connected with the serial port of base plate (5).
3. a kind of sectionalised protection device for high overload distribution transformer according to claim 1; it is characterized in that: also comprise power supply (8), guidance panel (1), network interface (2) and UART(3); described power supply (8) is connected with base plate (5), described guidance panel (1), network interface (2) and UART(3) be connected with the serial port of ARM9 core board (4) respectively.
4. a kind of sectionalised protection device for high overload distribution transformer according to claim 1, is characterized in that: described communication module (9) is GPRS module.
5. a kind of sectionalised protection device for high overload distribution transformer according to claim 1; it is characterized in that: described base plate (5) adopts model to be the PHY chip of DM9161AE, described ARM9 core board (4) employing model is the ARM926EJ-S chip of AT91SAM9260.
6. a kind of sectionalised protection device for high overload distribution transformer according to claim 2; it is characterized in that: the model of described integrated operational amplifier (63) is LM124; described MCU(65) model be MCF52259, the model of described A-D converter (64) is TLC3578IW.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
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| CN201410691940.XA CN104362589B (en) | 2014-11-27 | 2014-11-27 | A kind of sectionalised protection device for high overload distribution transformer |
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| Application Number | Priority Date | Filing Date | Title |
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| CN201410691940.XA CN104362589B (en) | 2014-11-27 | 2014-11-27 | A kind of sectionalised protection device for high overload distribution transformer |
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| CN104362589A true CN104362589A (en) | 2015-02-18 |
| CN104362589B CN104362589B (en) | 2017-08-25 |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105529686A (en) * | 2016-01-19 | 2016-04-27 | 国家电网公司 | Overload protection method and apparatus for distribution transformer of low voltage distribution line |
| CN110336247A (en) * | 2019-08-14 | 2019-10-15 | 张增禄 | A kind of method for protecting transformer holds control device and protection system |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2008117306A2 (en) * | 2007-03-23 | 2008-10-02 | Icsa India Limited | Distribution transformer monitoring system |
| CN202084918U (en) * | 2011-06-15 | 2011-12-21 | 蒋正坤 | Electric equipment monitoring system |
| CN103166180A (en) * | 2013-03-25 | 2013-06-19 | 广东电网公司东莞供电局 | Method and device for judging overload shedding for power system transformer |
| CN204290273U (en) * | 2014-11-27 | 2015-04-22 | 国家电网公司 | A kind of sectionalised protection device for high overload distribution transformer |
-
2014
- 2014-11-27 CN CN201410691940.XA patent/CN104362589B/en active Active
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2008117306A2 (en) * | 2007-03-23 | 2008-10-02 | Icsa India Limited | Distribution transformer monitoring system |
| CN202084918U (en) * | 2011-06-15 | 2011-12-21 | 蒋正坤 | Electric equipment monitoring system |
| CN103166180A (en) * | 2013-03-25 | 2013-06-19 | 广东电网公司东莞供电局 | Method and device for judging overload shedding for power system transformer |
| CN204290273U (en) * | 2014-11-27 | 2015-04-22 | 国家电网公司 | A kind of sectionalised protection device for high overload distribution transformer |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105529686A (en) * | 2016-01-19 | 2016-04-27 | 国家电网公司 | Overload protection method and apparatus for distribution transformer of low voltage distribution line |
| CN110336247A (en) * | 2019-08-14 | 2019-10-15 | 张增禄 | A kind of method for protecting transformer holds control device and protection system |
| CN110336247B (en) * | 2019-08-14 | 2022-01-28 | 张晓菊 | Method for protecting transformer, capacity controller and protection system |
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| Publication number | Publication date |
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| CN104362589B (en) | 2017-08-25 |
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