CN104362589B - A kind of sectionalised protection device for high overload distribution transformer - Google Patents
A kind of sectionalised protection device for high overload distribution transformer Download PDFInfo
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- CN104362589B CN104362589B CN201410691940.XA CN201410691940A CN104362589B CN 104362589 B CN104362589 B CN 104362589B CN 201410691940 A CN201410691940 A CN 201410691940A CN 104362589 B CN104362589 B CN 104362589B
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- distribution transformer
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- high overload
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Abstract
The present invention relates to a kind of sectionalised protection device for high overload distribution transformer, the defect for not being directed to high overload distribution transformer protection device is solved compared with prior art.The present invention includes communication module（9）, alternating current sampling circuit（6）With the interfaces of RS 485（7）, described interfaces of RS 485（7）On be connected with branch outlet switch A（71）With branch outlet switch B（72）, described alternating current sampling circuit（6）, the interfaces of RS 485（7）And communication module（9）Respectively with bottom plate（5）Serial port be connected, bottom plate（5）With ARM9 core boards（4）Serial port be connected.The present invention can effectively avoid high overload distribution transformer because it is long when in higher load condition cause Distribution Transformer Burning the problem of.
Description
Technical field
It is specifically a kind of to be used for high overload distribution transformer the present invention relates to high overload distribution transformer technical field
Sectionalised protection device.
Background technology
In recent years, with the improvement of economic condition, rural electricity consumption client starts largely to add air-conditioning, electric heater, electric cooker
Deng high-power electric appliance.Rural area migrant worker is daily to stay out, and the daily load in rural area platform area is less than normal, due to outgoing during the Spring Festival
Worker largely returns to one's native place the New Year of going home, and the high-power heating system such as air-conditioning, electric heater starts to concentrate operation, causes platform area load
It is substantially increased, distribution transformer is frequently present of heavy duty, the situation of overload.For this phenomenon, power supply unit is matched somebody with somebody by high overload
Become linked network to solve, high overload distribution transformer is installed.High load capacity shape occurs when being used for a long time in high overload distribution transformer
State, ultimately results in Distribution Transformer Burning, and is not directed to the safeguard measure of high overload distribution transformer at present.How to develop
Go out a kind of protection device for high overload distribution transformer and have become the technical problem for being badly in need of solving.
The content of the invention
The invention aims to solve not being directed to lacking for high overload distribution transformer protection device in the prior art
Fall into and solved the above problems there is provided a kind of sectionalised protection device for high overload distribution transformer.
To achieve these goals, technical scheme is as follows：
A kind of sectionalised protection device for high overload distribution transformer, including bottom plate and ARM9 core boards, in addition to it is logical
Believe and be connected with branch outlet switch A and branch's outlet on module, alternating current sampling circuit and RS-485 interfaces, described RS-485 interfaces
Switch B, described alternating current sampling circuit, RS-485 interfaces and communication module be connected with the serial port of bottom plate respectively, bottom plate and
The serial port of ARM9 core boards is connected.
Described alternating current sampling circuit includes PT and CT, PT and CT is connected with integrated operational amplifier respectively, described collection
It is connected into operational amplifier by A-D converter with MCU, described MCU is connected with the serial port of bottom plate.
Also include power supply, guidance panel, network interface and UART, described power supply is connected with bottom plate, described guidance panel, net
Mouth and serial ports of the UART respectively with ARM9 core boards are connected.
Described communication module is GPRS module.
Described bottom plate uses model DM9161AE PHY chip, and described ARM9 core boards use model
AT91SAM9260 ARM926EJ-S chips.
The model LM124 of described integrated operational amplifier, described MCU model MCF52259, described mould
The model TLC3578IW of A/D converter.
Beneficial effect
A kind of sectionalised protection device for high overload distribution transformer of the present invention, compared with prior art can be effective
Avoid high overload distribution transformer because it is long when in higher load condition cause Distribution Transformer Burning the problem of.It is of the invention real-time
The load data and run time of high overload distribution transformer are monitored, exceedes the duration of setting when the transformer station high-voltage side bus time
Afterwards, sectionalised protection device increased according to transformer load state, load shedding, largely coordinate avoid high capacity change
Depressor causes to burn and because can not effectively play the effect of high capacity transformer in low-load when long in higher load condition
The problem of rate.With the characteristics of design structure is simple, powerful, cost is more cheap, beneficial to a wide range of popularization.
Brief description of the drawings
Fig. 1 is circuit structure schematic diagram of the invention；
Fig. 2 is the circuit structure schematic diagram of alternating current sampling circuit in the present invention；
Wherein, 1- guidance panels, 2- network interfaces, 3-UART, 4-ARM9 core board, 5- bottom plates, 6- alternating current sampling circuits, 7-
RS-485 interfaces, 8- power supplys, 9- communication modules, 61-PT, 62-CT, 63- integrated operational amplifier, 64- A-D converters, 65-
Outlet switch A, 72- branches of MCU, 71- branch outlet switch B.
Embodiment
To make to have a better understanding and awareness to architectural feature of the invention and the effect reached, to preferably
Embodiment and accompanying drawing coordinate detailed description, are described as follows：
As shown in figure 1, a kind of sectionalised protection device for high overload distribution transformer of the present invention, including bottom plate
5 and ARM9 core boards 4, bottom plate 5 is connected with the serial port of ARM9 core boards 4, and bottom plate 5 is responsible for data transfer and control.ARM9 cores
Core 4 is responsible for mathematical logic judgement, and ARM9 core boards 4 are responsible for making comparisons and sentencing with logic with the electric current set, electric current, load definite value
It is disconnected, after protection device Real-time Monitoring Data, which exceedes, sets definite value and delay time, from ARM9 core boards 4 to RS-485 interfaces
7 assign Load adjustment instruction, while generating event of failure record, the logic that RS-485 interfaces 7 are sent according to ARM9 core boards 4 refers to
Make the excision operation that executable portion is loaded.RS-485 interfaces 7 are connected with the serial port of bottom plate 5, and RS-485 interfaces 7 play control branch
Branch outlet switch A71 and branch outlet switch B72 are connected with the effect on road, RS-485 interfaces 7.Branch outlet switch A71 and
Branch outlet switch B72 is the outlet switch of branch path, then has a plurality of branch road during practical application, is controlled by RS-485 interfaces 7
The closed and disconnected of a plurality of branch road.Communication module 9 is connected with the serial port of bottom plate 5, and communication module 9 is used for into row data communication,
It can select GPRS or 3G module.If GPRS module, then SIM900S modules can be selected, can be with by SIM900S modules
GPRS signals are converted into UART signal and pass to bottom plate 5, so as to reach ARM9 core boards 4.
Alternating current sampling circuit 6 is responsible for voltage, electric current, the power factor data of collection high overload distribution transformer in real time, hands over
Stream sample circuit 6 is connected with the serial port of bottom plate 5, in actual applications, and alternating current sampling circuit 6 is arranged on end of incoming cables in JP cabinets,
The three-phase voltage and three-phase current of end of incoming cables are gathered, then the data collected are reached into ARM9 core boards 4 by bottom plate 5 and enters line number
Value judges.It is used to gather three-phase voltage as shown in Fig. 2 alternating current sampling circuit 6 includes PT61 and CT62, PT61, CT62 is used to adopt
Collect three-phase current.PT61 and CT62 are connected with integrated operational amplifier 63 respectively, the model of integrated operational amplifier 63
LM124, the electric current collected, voltage data is carried out the amplification of analog quantity.Integrated operational amplifier 63 passes through A-D converter
64 are connected with MCU65, and A-D converter 64 is using the TLC3578IW of TI companies, and MCU65 is from model MCF52259.MCU65
It is connected with the serial port of bottom plate 5, the voltage that is collected by PT61 and CT62, current data, by integrated operational amplifier 63
Meet at A-D converter 64 after amplification to be simulated to the conversion of numeral, the data signal after conversion passes to bottom by MCU65 again
Plate 5, bottom plate 5 gives ARM9 core boards 4 and carries out voting logic judgement.
Whole device is powered by power supply 8, and power supply 8 is connected with bottom plate 5.Power supply 8 uses three-phase four-wire system AC power
（UA、UB、UC、UN）Power input is provided, three-way direct current power supply is output as：Main power source 12V, respectively carrier wave are logical with 12V and 485
Believe 12V.Operation and later maintenance, can also include guidance panel 1, network interface 2 and UART3 for convenience.Guidance panel 1, network interface 2
Serial port with UART3 respectively with ARM9 core boards 4 is connected, and guidance panel 1 is man machine operation interface, can directly be operated
Safeguard.Network interface 2 and UART3 are remote maintenance platform, can more convenient upkeep operation.Bottom plate 5 can use model
DM9161AE PHY chip.ARM9 core boards 4 can use model AT91SAM9260 ARM926EJ-S chips, and it is supported
Six road serial ports, can increase the road serial ports of Kuo Zhi 10 by ST16C55X family chips, and the SDRAM with 64MB, maximum supports 1GB
NandFlash。
In actual use, alternating current sampling circuit 6 is arranged in intelligent JP cabinets, and height is obtained by alternating current sampling circuit 6
Overload the service data of distribution transformer, and record and statistical analysis in real time.If ARM9 core boards 4 judge alternating current sampling circuit
6 data collected exceed threshold value, i.e. peak load operation exceeds schedule time, then bottom plate 5 passes through the control point of RS-485 interfaces 7
Branch outlet switch A71 or branch outlet switch B72（2 tunnels or 3 tunnels）Branch's outlet switch separating brake, breaking part load.Handing over
When flowing the detection of sample circuit 6 less than threshold value, i.e., load is stabilized to range of operation again, then is branched out by the control section of bottom plate 5
Wiretap, which closes a floodgate, recovers the operation of load.To avoid cut-out is larger from going out specific electric load, the sectionalised protection of high overload distribution transformer
Device can also be analyzed every outlet load condition all the way before load is disconnected, so as to judge which road outlet cut off
Load is the loss reduction to load, so as to both ensure that the safe operation of transformer, also ensure that the continuity of load operation.
General principle, principal character and the advantages of the present invention of the present invention has been shown and described above.The technology of the industry
Personnel are it should be appreciated that the present invention is not limited to the above embodiments, and that described in above-described embodiment and specification is the present invention
Principle, various changes and modifications of the present invention are possible without departing from the spirit and scope of the present invention, these change and
Improvement is both fallen within the range of claimed invention.The protection domain of application claims by appended claims and its
Equivalent is defined.
Claims (4)
1. a kind of sectionalised protection device for high overload distribution transformer, including bottom plate (5) and ARM9 core boards (4), it is special
Levy and be：Also include on communication module (9), alternating current sampling circuit (6) and RS-485 interfaces (7), described RS-485 interfaces (7)
It is connected with branch outlet switch A (71) and branch outlet switch B (72), described alternating current sampling circuit (6), RS-485 interfaces (7)
Serial port with communication module (9) respectively with bottom plate (5) is connected, and bottom plate (5) is connected with the serial port of ARM9 core boards (4)；
Described alternating current sampling circuit (6) includes PT (61) and CT (62), PT (61) and CT (62) and amplified respectively with integrated computation
Device (63) is connected, and described integrated operational amplifier (63) is connected by A-D converter (64) with MCU (65), described MCU
(65) serial port with bottom plate (5) is connected；
Also include power supply (8), guidance panel (1), network interface (2) and UART (3), described power supply (8) is connected with bottom plate (5), institute
Serial port of the guidance panel (1), network interface (2) and UART (3) stated respectively with ARM9 core boards (4) is connected.
2. a kind of sectionalised protection device for high overload distribution transformer according to claim 1, it is characterised in that：Institute
The communication module (9) stated is GPRS module.
3. a kind of sectionalised protection device for high overload distribution transformer according to claim 1, it is characterised in that：Institute
The bottom plate (5) stated uses model DM9161AE PHY chip, and described ARM9 core boards (4) use model
AT91SAM9260 ARM926EJ-S chips.
4. a kind of sectionalised protection device for high overload distribution transformer according to claim 1, it is characterised in that：Institute
The model LM124 for the integrated operational amplifier (63) stated, described MCU (65) model MCF52259, described modulus
The model TLC3578IW of converter (64).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410691940.XA CN104362589B (en) | 2014-11-27 | 2014-11-27 | A kind of sectionalised protection device for high overload distribution transformer |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| 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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| Publication Number | Publication Date |
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| CN104362589A CN104362589A (en) | 2015-02-18 |
| CN104362589B true CN104362589B (en) | 2017-08-25 |
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| CN201410691940.XA Active CN104362589B (en) | 2014-11-27 | 2014-11-27 | A kind of sectionalised protection device for high overload distribution transformer |
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Families Citing this family (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105529686B (en) * | 2016-01-19 | 2018-01-05 | 国家电网公司 | A kind of method and device for overload protection of the distribution transformer of low-voltage distributing line |
| CN110336247B (en) * | 2019-08-14 | 2022-01-28 | 张晓菊 | Method for protecting transformer, capacity controller 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 |
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