CN106338306A - High voltage transformer online monitoring system - Google Patents

High voltage transformer online monitoring system Download PDF

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Publication number
CN106338306A
CN106338306A CN201610692027.0A CN201610692027A CN106338306A CN 106338306 A CN106338306 A CN 106338306A CN 201610692027 A CN201610692027 A CN 201610692027A CN 106338306 A CN106338306 A CN 106338306A
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CN
China
Prior art keywords
monitoring
transformer
module
unit
connects
Prior art date
Application number
CN201610692027.0A
Other languages
Chinese (zh)
Inventor
何勤刚
杨庆河
李俊芳
高越
高峰
赵鑫
刘雅男
刘振华
韩兵
李凤贤
马劲松
李保水
刘聪
王兴鹏
马先超
崔功文
王永东
李雷
李伟
弭连忠
赵文
乔世菊
张芳
Original Assignee
国网山东省电力公司章丘市供电公司
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Application filed by 国网山东省电力公司章丘市供电公司 filed Critical 国网山东省电力公司章丘市供电公司
Priority to CN201610692027.0A priority Critical patent/CN106338306A/en
Publication of CN106338306A publication Critical patent/CN106338306A/en

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    • GPHYSICS
    • G01MEASURING; TESTING
    • G01DMEASURING NOT SPECIALLY ADAPTED FOR A SPECIFIC VARIABLE; ARRANGEMENTS FOR MEASURING TWO OR MORE VARIABLES NOT COVERED IN A SINGLE OTHER SUBCLASS; TARIFF METERING APPARATUS; MEASURING OR TESTING NOT OTHERWISE PROVIDED FOR
    • G01D21/00Measuring or testing not otherwise provided for
    • G01D21/02Measuring two or more variables by means not covered by a single other subclass
    • GPHYSICS
    • G08SIGNALLING
    • G08CTRANSMISSION SYSTEMS FOR MEASURED VALUES, CONTROL OR SIMILAR SIGNALS
    • G08C17/00Arrangements for transmitting signals characterised by the use of a wireless electrical link
    • G08C17/02Arrangements for transmitting signals characterised by the use of a wireless electrical link using a radio link

Abstract

The invention discloses a high voltage transformer online monitoring system, and relates to the technical field of power distribution equipment online monitoring. The technical method of transformer overall state online monitoring is adopted so that the technical problems that the conventional monitoring method is separated in parts, high in waste of resources and complex in structure can be solved, and the technical effects of unified monitoring through a single-chip microcomputer unit, integrated resource management and conservation and simple and effective monitoring mode can be achieved; the technical method of GPRS wireless communication is adopted so that the technical problems that the conventional monitoring method is difficult in system wiring and is liable to be influenced by the environment can be solved, and the technical effects of wireless remote monitoring and low environment influence can be achieved; the technical design of multiple high-performance sensors is adopted so that the technical problems that the conventional monitoring method is inaccurate and high in error can be solved, and the technical effects of accurate monitoring of the monitoring system and low error can be achieved; and a winding deformation frequency response analysis method is adopted so that the technical effects of accurate monitoring of the winding deformation degree can be achieved.

Description

High-tension transformer on-line monitoring system
Technical field
The present invention relates to controller switching equipment on-line monitoring technique field, more particularly, to high-tension transformer on-line monitoring system.
Background technology
At present, the main service work of China's Substation Electric Equipment is still periodically to carry out preventive trial, according to its knot Fruit parameter is judging the running status of power equipment, and then determines whether power equipment can continue to run with.For a long time, China Waste substantial amounts of human and material resources and financial resources in scheduled overhaul, also create suitable loss of outage and equipment longevity simultaneously The reduction of life.With developing rapidly of current science and technology, the high capacity of power system, Towards Higher Voltage, complex structureization will It is inexorable trend, therefore the requirement to Power System Security And Reliability index is also by more and more higher.This traditional test with examine Disconnected method has not caught up with the needs of development gradually, with repair based on condition of component replace traditional periodic inspection mode be development must So trend.
Primary cut-out is requisite equipment in power plant and electric substation's power distribution equipment, for the shape of primary cut-out State is monitored as realizing creating advantage by the transformation of scheduled overhaul to repair based on condition of component.To primary cut-out on-line monitoring With fault diagnosis, with the fast development of computer technology, signal transacting, artificial intelligence and sensing technology, have become as possibility. At present, each unit of power system is just being devoted to being changed primary cut-out to repair based on condition of component from scheduled overhaul, according to equipment Virtual condition is keeped in repair.This method can find the defect of primary cut-out in time, reduces equipment preventive trial number of times, Reduce the workload of maintenance, the incidence of accident and frequency of power cut.Which ensure that the safe and reliable operation of primary cut-out, Improve the reliability of Operation of Electric Systems.Progressively replaced with the real-time state monitoring maintenance as foundation for the on-line monitoring with preventative examination Predictive maintenance based on testing, this, no matter in theory, still all has great value in practice.Only pass through online accordingly Monitoring system, provides reliable, accurate status monitoring information, is only the solid foundation of repair based on condition of component..
Content of the invention
Present invention aims in place of the deficiencies in the prior art, providing a kind of high-tension transformer on-line monitoring system System, to solve that traditional monitoring mode part is scattered, waste of resource is many, complex structure, communication system difficult wiring, easily by environment shadow Sound, the technical problem that accurate, error is big.
For achieving the above object, the technical solution adopted in the present invention is:
A kind of high-tension transformer on-line monitoring system, including transformer, internet, monitoring unit, monitoring master station with Gprs network;Monitoring unit input side connection transformer, monitoring unit outlet side is connected with communication unit, and monitoring unit passes through logical Letter unit connects gprs network, and gprs network is interacted with internet, and internet is connected with server, monitoring Master station connects internet by server;
Monitoring unit includes mcu unit, monitoring modular and power module;Mcu unit side i/o is connected with multiple data buffer storages Device, monitoring modular passes through data buffer and mcu unit communication, and mcu unit opposite side serial ports is connected with modulation serial ports, and mcu is mono- Unit controls indicator lamp, and communication unit is connected on the serial ports of mcu unit;Power module connects the voltage input end of mcu unit;
Optimize the technical program further, described communication unit includes gprs module and antenna, and mcu unit connects gprs module Signal input part, the signal output part of gprs module is connected with antenna, and power module connects the power input of gprs module;
Optimize the technical program further, described power module includes rectification module and solar panels;Solar panels connect whole The input side of flow module, the opposite side of rectification module output end is connected with ups power supply;
Optimize the technical program further, described rectification module includes transformer t1, rectifier bridge d1,78l12 chip, lm2576 Chip and lm117 chip, power module outlet includes+12v, three electric pressures of+5v ,+3.3v, and power module is that mcu is mono- Unit and gprs module provide+5v voltage;
Optimize the technical program further, described monitoring modular includes oil dissolved gas monitoring modular, oil temperature monitoring modular, winding Deformation monitoring module and line voltage distribution/stream monitoring modular;Monitoring modular include oil dissolved gas monitoring modular, oil temperature monitoring modular, The output end of winding deformation monitoring modular and line voltage distribution/stream monitoring modular connects data latches;
Optimize the technical program further, described winding deformation monitoring modular includes swept signal generator and double-channel data Capture card, a winding of swept signal generator connection transformer, two inputs of double channel data acquisition card connect respectively Connect two windings of transformer, the output end of double channel data acquisition card connects data latches;
Further optimize the technical program, described line voltage distribution/stream monitoring modular include voltage transformer, current transformer and Amplifying circuit;Input connection transformer winding, current transformer and the voltage transformer of current transformer and voltage transformer Output end connect the input of amplifying circuit, the output end of amplifying circuit is connected with a/d converter a, and line voltage distribution/stream is monitored Module connects data latches by a/d converter a;
Optimize the technical program further, described oil temperature monitoring modular includes gas extraction and detects list with separative element, gas Unit;Oil body is contained, the oil body in transformer connects the input of gas extraction and separative element in transformer;Gas detection cell Input connect the output end of gas extraction and separative element, the output end of gas detection cell is connected with a/d converter b, Oil temperature monitoring modular connects data latches by a/d converter b;
Optimize the technical program further, described mcu unit is atmega128 single-chip microcomputer, and gprs module is em310 gsm mould Block, a/d converter a and a/d converter b are adc0809 converter, and data latches are 74ls373 module;
Optimize the technical program further, the txd pin of described gprs module connects the rxd0 pin of mcu unit, gprs mould The rxd pin of block connects the txd0 pin of mcu unit;The data output end of data latches connects the pd mouth of mcu unit, data The Enable Pin of latch connects the pa mouth of mcu unit.
Compared with prior art, the invention has the advantages that 1, atmega128 single-chip microcomputer is used as main control unit, It is integrated with the memory of larger capacity and abundant powerful hardware interface circuit, there is very high performance price ratio;2nd, adc0809 tool Have at a high speed, in high precision, the characteristic of Low Drift Temperature, outstanding long-term accuracy and repeatability, low-power consumption;3rd, em310 chip embeds Tcp/ip agreement;Support multi-link, ack response is provided, large capacity cache is provided;4th, power module adopts ups power supply and the sun The mode of energy plate duplicate supply, economizes on resources, and ensure that the electricity consumption reliability of system.
Brief description
Fig. 1 is information transmission process figure of the present invention;
Fig. 2 is monitoring unit structural representation;
Fig. 3 is communication module structural representation;
Fig. 4 is power module structure schematic diagram;
Fig. 5 is monitoring modular structural representation;
Fig. 6 is winding deformation monitoring modular structural representation;
Fig. 7 is line voltage distribution/stream monitoring modular structure chart;
Fig. 8 is oil dissolved gas monitoring modular structure chart;
Fig. 9 is single machine unit circuit structure diagram
Figure 10 is a/d converter circuit structure figure;
Figure 11 is amplification circuit structure figure;
Figure 12 is data latch circuit structure chart;
Figure 13 is gprs modular circuit structure chart;
Figure 14 is rectification module circuit structure diagram.
In figure, 1, transformer;2nd, monitoring unit;3rd, communication unit;4th, gprs network;5th, internet;6th, service Device;7th, monitor master station;21st, mcu unit;22nd, power module;23rd, modulate serial ports;24th, indicator lamp;25th, monitoring modular;26th, number According to latch;31st, gprs module;32nd, antenna;41st, solar panels;42nd, rectification module;43rd, ups power supply;51 oil dissolved gas prisons Survey module;52nd, oil temperature monitoring modular;53rd, winding deformation monitoring modular;54th, line voltage distribution/stream monitoring modular;61st, swept-frequency signal Generator;62nd, double channel data acquisition card;71st, a/d converter a;72nd, voltage transformer;73rd, current transformer;74th, amplify Circuit;81st, oil body;82nd, gas extraction and separative element;83rd, gas detection cell;84th, a/d converter b.
Specific embodiment
For making the object, technical solutions and advantages of the present invention of greater clarity, with reference to specific embodiment and join According to accompanying drawing, the present invention is described in more detail.It should be understood that these descriptions are simply exemplary, and it is not intended to limit this Bright scope.Additionally, in the following description, eliminate the description to known features and technology, to avoid unnecessarily obscuring this The concept of invention.
Specific embodiment one:
In conjunction with shown in Fig. 1-14, a kind of high-tension transformer on-line monitoring system, including transformer 1, internet 5, monitoring Unit 2, monitoring master station 7 and gprs network 4;Connection transformer 1 is surveyed in monitoring unit 2 input, and monitoring unit 2 outlet side is connected with logical Letter unit 3, monitoring unit 2 connects gpr4s network 4 by communication unit 3, and gprs network is interacted with internet 5, Server 6 is connected with internet 5, monitoring master station 7 connects internet 5 by server 6;Monitoring unit 2 Including mcu unit 21, monitoring modular 25 and power module 22;Mcu unit 21 side i/o is connected with multiple data buffers 26, Monitoring modular 25 is communicated with mcu unit 21 by data buffer 26, and mcu unit 21 opposite side serial ports is connected with modulation serial ports Unit 23, mcu 21 controls indicator lamp 24, and communication unit 3 is connected on the serial ports of mcu unit 21;Power module 22 connects mcu The voltage input end of unit 21;
Described communication unit 3 includes gprs module 31 and antenna 32, and mcu unit 21 connects the signal input of gprs module 31 End, the signal output part of gprs module 31 is connected with antenna 32, and power module 22 connects the power input of gprs module 31;Institute The power module 22 stated includes rectification module 42 and solar panels 41;Solar panels 41 connect the input one of rectification module 42 Side, the opposite side of rectification module 42 output end is connected with ups power supply 43;
Described rectification module 42 includes transformer t1, rectifier bridge d1,78l12 chip, lm2576 chip and lm117 chip, electricity Source module 22 output end includes+12v, three electric pressures of+5v ,+3.3v, and power module 22 is mcu unit 21 and gprs module 31 offer+5v voltages;Described monitoring modular 25 includes oil dissolved gas monitoring modular 51, oil temperature monitoring modular 52, winding deformation Monitoring modular 53 and line voltage distribution/stream monitoring modular 54;Oil dissolved gas monitoring modular 51, oil temperature monitoring modular 52, winding deformation The output end of monitoring modular 53 and line voltage distribution/stream monitoring modular 54 connects data latches 26;
Described winding deformation is monitored 53 modules and is included swept signal generator 61 and double channel data acquisition card 62, swept-frequency signal One winding of generator 61 connection transformer 1, two inputs difference connection transformers 1 of double channel data acquisition card 62 Two windings, the output end of double channel data acquisition card 62 connects data latches 26;Described line voltage distribution/stream monitoring modular 54 include voltage transformer 72, current transformer 73 and amplifying circuit 74;Current transformer 73 and the input of voltage transformer 72 End connection transformer 1 winding, the output end of current transformer 73 and voltage transformer 72 connects the input of amplifying circuit 74, puts The output end of big circuit 74 is connected with a/d converter a71, and line voltage distribution/stream monitoring modular 54 passes through a/d converter a71 and connects Data latches 26;
Described oil temperature monitoring modular 52 includes gas extraction and separative element 82, gas detection cell 83;Contain in transformer 1 Oil body 81, the oil body 81 in transformer 1 connects the input of gas extraction and separative element 82;The input of gas detection cell 83 End connects the output end of gas extraction and separative element 82, and the output end of gas detection cell 83 is connected with a/d converter b84, Oil temperature monitoring modular 52 connects data latches 26 by a/d converter b84;Described mcu unit 21 is atmega128 monolithic Machine, gprs module 31 is em310 gsm module, and a/d converter a71 and a/d converter b84 is adc00809 converter, data Latch 26 is 74ls373 module;
The txd pin of described gprs module 31 connects the rxd0 pin of mcu unit 21, and the rxd pin of gprs module 31 connects The txd0 pin of mcu unit 21;The data output end of data latches 26 connects the pd mouth of mcu unit 21, data latches 26 Enable Pin connect mcu unit 21 pa mouth;
Fig. 1 be the system information transfer figure, wherein, monitoring unit 2 monitor transformer 1 various states, including winding deformation, The air content of oil, oil temperature, transformer 1 voltage, current value etc. in transformer 1, and transmitted to gprs network 4 by communication unit 3 In, realize being wirelessly transferred;Gprs network 4 is interacted with internet 5, makes monitoring master station 7 receive monitoring letter by server Number and make control judge.
Fig. 2 is the schematic diagram of monitoring unit 2, and the core cell of monitoring unit 2 is mcu unit 21, plays signal Analysis, monitoring Signal simultaneously sends the effect of control signal, and monitoring modular 23 monitors transformer, and data is temporarily stored in data latches 26 In, it is later sent to mcu unit 21, mcu unit 21 opposite side passes through indicator lamp 24 display working condition, and has modulation serial ports 23, make device have modulation capability, power module 22 provides electric energy for it.
Fig. 3 is communication unit 3, and wherein gprs module 31 achieves radio communication, such as Figure 13, and the present invention selects em310 Gsm chip is connected with gprs network 5, and is connected with mcu unit 21 by serial mode, realize monitoring system of the present invention realize with Gprs network 4, connection server 6 then, report the function of monitoring situation at any time.
In Fig. 4, power module 22, by the way of ups power supply 43 and solar panels 41 duplicate supply, economizes on resources, and ensures The electricity consumption reliability of system.Fig. 5 is each monitoring modular it is achieved that the containing of oil in winding deformation in transformer 1, transformer 1 The monitoring of the monitoring variables such as tolerance, oil temperature, transformer 1 voltage, current value.
In Fig. 6, with swept signal generator 61, a stable sinusoidal scanning signal is applied to tested Transformer Winding One end, is recorded voltage magnitude and the phase angle of this end and the winding other end simultaneously, is gathered using double channel data acquisition card 62 tested End and the data of responder, are sent to mcu unit 21, obtain one group of frequency response curve, and then are examined according to frequency response method (fra) The situation quality of disconnected transformer 1 winding deformation.
Fig. 7 passes through to monitor electric current, the magnitude of voltage of transformer 1 winding, amplifies signal by amplifying circuit 74 and complies with list The input standard of piece machine, is converted into data signal finally by a/d converter 71 and is gathered by data latches 26.In Fig. 8, oil immersion TRANSFORMER INSULATING MATERIAL is mainly insulating oil and oil-paper, and the shortage of heat that transformer 1 produces in normal work is to destroy change The intramolecular chemical bonding structure of depressor petroleum hydrocarbon, but when there is the faults such as hot-spot or high arc temperature inside transformer 1, Trouble point will discharge heat, and these energy are mostly used in the cracking of insulating oil and solid insulating material, make hydrocarbon The bond fission of thing and produce ch4,c2h6,c2h4And c2h2Deng low molecular hydrocarbon, and co, co2And h2Deng gas, by extraction, divide Body, detection method monitor various gas contents, and send data to data latches 26.
Fig. 9 is mcu unit 21 circuit structure diagram;Muc unit 21 is atmage128 single-chip microcomputer, including the minimum system of single-chip microcomputer System, in figure power ground has concealed, and other is serial ports wiring and i/o wiring, and atmage128 single-chip microcomputer is integrated with larger capacity Memory and abundant powerful hardware interface circuit, there is very high performance price ratio, make the present invention have higher practicality Can with stablize feasibility.Figure 10 is the schematic diagram of a/d converter, using adc0809 module, its have at a high speed, in high precision, low temperature The characteristic of drift, outstanding long-term accuracy and repeatability, low-power consumption.
Figure 14 provides the physical circuit figure of power module 22, such as schemes, and power module 22 passes through solar panels 41 voltage or ups Produce+12v ,+5v ,+3.3 three kinds of electric pressures after power supply 43 rectifier transformer, be that mcu unit 21 grade chip provides stable electricity Pressure.
It should be appreciated that the above-mentioned specific embodiment of the present invention is used only for exemplary illustration or explains the present invention's Principle, and be not construed as limiting the invention.Therefore, that is done in the case of without departing from the spirit and scope of the present invention is any Modification, equivalent, improvement etc., should be included within the scope of the present invention.Additionally, claims purport of the present invention Covering the whole changes falling in scope and border or the equivalents on this scope and border and repair Change example.

Claims (10)

1. a kind of high-tension transformer on-line monitoring system it is characterised in that: include transformer (1), internet (5), prison Survey unit (2), monitoring master station (7) and gprs network (4);Monitoring unit (2) input side connection transformer (1), monitoring unit (2) Outlet side is connected with communication unit (3), and monitoring unit (2) connects gprs network (4), gprs network (4) by communication unit (3) Interact with internet (5), internet (5) is connected with server (6), server is passed through in monitoring master station (7) (6) connect internet (5);
Monitoring unit (2) includes mcu unit (21), monitoring modular (25) and power module (22);Mcu unit (21) side i/o It is connected with multiple data buffers (26), monitoring modular (25) is communicated with mcu unit (21) by data buffer (26), mcu Unit (21) opposite side serial ports is connected with modulation serial ports (23), and mcu unit (21) controls indicator lamp (24), communication unit (3) It is connected on the serial ports of mcu unit (21);Power module (22) connects the voltage input end of mcu unit (21).
2. high-tension transformer on-line monitoring system according to claim 1 it is characterised in that: communication unit (3) include Gprs module (31) and antenna (32), mcu unit (21) connects the signal input part of gprs module (31), gprs module (31) Signal output part is connected with antenna (32), and power module (22) connects the power input of gprs module (31).
3. high-tension transformer on-line monitoring system according to claim 1 it is characterised in that: power module (22) include whole Flow module (42) and solar panels (41);Solar panels (41) connect the input side of rectification module (42), rectification module (42) opposite side of output end is connected with ups power supply (43).
4. high-tension transformer on-line monitoring system according to claim 3 it is characterised in that: rectification module (42) include become Depressor t1, rectifier bridge d1,78l12 chip, lm2576 chip and lm117 chip, power module (22) output end include+12v ,+ Three electric pressures of 5v ,+3.3v, power module (22) is mcu unit (21) and gprs module (31) provides+5v voltage.
5. high-tension transformer on-line monitoring system according to claim 1 it is characterised in that: monitoring modular (25) include oil Middle gas-monitoring module (51), oil temperature monitoring modular (52), winding deformation monitoring modular (53) and line voltage distribution/stream monitoring modular (54);Oil dissolved gas monitoring modular (51), oil temperature monitoring modular (52), winding deformation monitoring modular (53) and line voltage distribution/stream The output end of monitoring modular (54) connects data latches (26).
6. high-tension transformer on-line monitoring system according to claim 5 it is characterised in that: winding deformation monitoring (53) mould Block includes swept signal generator (61) and double channel data acquisition card (62), swept signal generator (61) connection transformer (1) a winding, two windings of two inputs difference connection transformer (1) of double channel data acquisition card (62), double The output end of channel data capture card (62) connects data latches (26).
7. high-tension transformer on-line monitoring system according to claim 5 it is characterised in that: line voltage distribution/stream monitoring mould Block (54) includes voltage transformer (72), current transformer (73) and amplifying circuit (74);Current transformer (73) and voltage are mutual Input connection transformer (1) winding of sensor (72), the output end of current transformer (73) and voltage transformer (72) connects The input of amplifying circuit (74), the output end of amplifying circuit (74) is connected with a/d converter a (71), line voltage distribution/stream monitoring Module (54) connects data latches (26) by a/d converter a (71).
8. high-tension transformer on-line monitoring system according to claim 5 it is characterised in that: oil temperature monitoring modular (52) bag Include gas extraction and separative element (82), gas detection cell (83);Oil body (81) is contained, in transformer (1) in transformer (1) Oil body (81) connect the input of gas extraction and separative element (82);The input of gas detection cell (83) connects gas Extraction and the output end of separative element (82), the output end of gas detection cell (83) is connected with a/d converter b (84), oil temperature Monitoring modular (52) connects data latches (26) by a/d converter b (84).
9. high-tension transformer on-line monitoring system according to claim 1 and 2 it is characterised in that: mcu unit (21) is Atmega128 single-chip microcomputer, gprs module (3) is em310 gsm module, and a/d converter a (71) and a/d converter b (84) is Adc0809 converter, data latches (26) are 74ls373 module.
10. high-tension transformer on-line monitoring system according to claim 9 it is characterised in that: the txd of gprs module (31) Pin connects the rxd0 pin of mcu unit (21), and the rxd pin of gprs module (31) connects the txd0 pin of mcu unit (21); The data output end of data latches (26) connects the pd mouth of mcu unit (21), and the Enable Pin of data latches (26) connects mcu The pa mouth of unit (21).
CN201610692027.0A 2016-08-22 2016-08-22 High voltage transformer online monitoring system CN106338306A (en)

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