CN106291084B - A kind of power transformer near region short circuit monitoring method - Google Patents
A kind of power transformer near region short circuit monitoring method Download PDFInfo
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- CN106291084B CN106291084B CN201610899333.1A CN201610899333A CN106291084B CN 106291084 B CN106291084 B CN 106291084B CN 201610899333 A CN201610899333 A CN 201610899333A CN 106291084 B CN106291084 B CN 106291084B
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- 238000012544 monitoring process Methods 0.000 title claims abstract description 14
- 238000000034 method Methods 0.000 title claims abstract description 12
- 238000005070 sampling Methods 0.000 claims abstract description 17
- 238000002955 isolation Methods 0.000 claims description 11
- 230000035939 shock Effects 0.000 claims description 7
- 230000003321 amplification Effects 0.000 claims description 6
- 238000003199 nucleic acid amplification method Methods 0.000 claims description 6
- 230000001960 triggered effect Effects 0.000 claims description 6
- 230000003993 interaction Effects 0.000 claims description 4
- 230000003044 adaptive effect Effects 0.000 claims description 3
- 238000006243 chemical reaction Methods 0.000 claims description 3
- 230000032258 transport Effects 0.000 claims description 3
- 238000004891 communication Methods 0.000 abstract description 6
- 238000012423 maintenance Methods 0.000 abstract description 5
- 238000012216 screening Methods 0.000 abstract description 5
- 238000004458 analytical method Methods 0.000 abstract description 4
- 238000010586 diagram Methods 0.000 abstract description 3
- 238000012545 processing Methods 0.000 description 4
- 230000009466 transformation Effects 0.000 description 4
- 238000012806 monitoring device Methods 0.000 description 3
- 238000004804 winding Methods 0.000 description 3
- 241001269238 Data Species 0.000 description 2
- 238000001514 detection method Methods 0.000 description 2
- 238000005259 measurement Methods 0.000 description 2
- 230000001133 acceleration Effects 0.000 description 1
- 238000004587 chromatography analysis Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 230000005611 electricity Effects 0.000 description 1
- 238000005538 encapsulation Methods 0.000 description 1
- 238000005265 energy consumption Methods 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 230000006870 function Effects 0.000 description 1
- 230000003862 health status Effects 0.000 description 1
- 238000003780 insertion Methods 0.000 description 1
- 230000037431 insertion Effects 0.000 description 1
- 238000007689 inspection Methods 0.000 description 1
- 238000009413 insulation Methods 0.000 description 1
- 238000013021 overheating Methods 0.000 description 1
- 230000008569 process Effects 0.000 description 1
- 238000004080 punching Methods 0.000 description 1
- 230000004044 response Effects 0.000 description 1
- 238000004088 simulation Methods 0.000 description 1
- 230000001052 transient effect Effects 0.000 description 1
Classifications
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
- G01R19/00—Arrangements for measuring currents or voltages or for indicating presence or sign thereof
- G01R19/25—Arrangements for measuring currents or voltages or for indicating presence or sign thereof using digital measurement techniques
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
- G01R19/00—Arrangements for measuring currents or voltages or for indicating presence or sign thereof
- G01R19/22—Arrangements for measuring currents or voltages or for indicating presence or sign thereof using conversion of ac into dc
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
- G01R31/00—Arrangements for testing electric properties; Arrangements for locating electric faults; Arrangements for electrical testing characterised by what is being tested not provided for elsewhere
- G01R31/50—Testing of electric apparatus, lines, cables or components for short-circuits, continuity, leakage current or incorrect line connections
- G01R31/62—Testing of transformers
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- General Physics & Mathematics (AREA)
- Engineering & Computer Science (AREA)
- Power Engineering (AREA)
- Remote Monitoring And Control Of Power-Distribution Networks (AREA)
- Testing Of Short-Circuits, Discontinuities, Leakage, Or Incorrect Line Connections (AREA)
Abstract
The present invention relates to a kind of power transformer near region short circuit monitoring methods, the three-phase noninductive resistance concatenated on the threephase current transformer of Circuit Fault on Secondary Transformer is by the analog signal of acquisition through signal through isolated amplifier, low-pass filter, absolute value converting unit and range self-adapting unit are sent to A/D sampling unit, A/D sampling unit continuous acquisition analog signal, first processor carries out operation to the current sampling data of reading, screening obtains the current effective value of waveform and the failure instantaneous value of jump-value of current, the fault data that moment occurs for failure is cached in dual-ported memory, second processor receives the fault data of dual-ported memory and draws waveform diagram through network interface and host computer communication, second processor counts received fault data and is stored into the memory of large capacity simultaneously.The present invention is acquired Short Circuit Fault on Secondary Transformer dash current, records and analyzes, and can provide accurate foundation for transformer station high-voltage side bus status analysis and maintenance.
Description
The application be application No. is: 201210068241.0, invention and created name be " short-circuit current of near zone of transformer is real-time
Monitoring method ", the applying date are as follows: the divisional application of the application for a patent for invention on March 15th, 2012.
Technical field
The present invention relates to a kind of real-time monitoring method for short-circuit current of near zone of transformer, belong to short-circuit current of near zone of transformer prison
Survey technology field.
Background technique
Core equipment of the power transformer as power grid, it is most important to the safe and reliable operation of power grid.Only to transformation
The failure of device is accurately analyzed and is judged, timely and effective treatment measures can be just taken, it is ensured that the normal operation of power grid and
To the normal power supply of user.After low-pressure side is by terminal short-circuit, near region short circuit, transformer winding can be born 110kV transformer
Sizable electric current influences its health status；Each short circuit current all can form build-up effect to transformer winding, be formed latent
Volt property corrupted, therefore the short circuit of transformer near region is a necessary detection project.And at present for the inspection of transformer near region short circuit
Survey is to use measuring transformer insulation resistance, while comprehensive Chromatographic Analysis of Transformer oil is to judge internal overheating fault and electric discharge
Property failure, and determine failure severity and general position, it is possible to find transformer near region short circuit after fault severity level,
To propose corresponding anti-accident measures.But above-mentioned detection of complex, since Short Circuit Fault on Secondary Transformer surge can not be provided
The size and number of shocks of amount, therefore cannot foundation accurately be provided for transformer station high-voltage side bus status analysis and maintenance.
Summary of the invention
Short Circuit Fault on Secondary Transformer dash current can be acquired, recorded and be divided the object of the present invention is to provide a kind of
Analysis can provide the power transformer near region short circuit monitoring method of accurate foundation for transformer station high-voltage side bus status analysis and maintenance.
The technical solution of the present invention in order to achieve the above objectives is: a kind of power transformer near region short circuit monitoring method, special
Sign is: being serially connected with three-phase noninductive resistance on the threephase current transformer of Circuit Fault on Secondary Transformer respectively, three-phase noninductive resistance will be adopted
The analog signal of collection carries out isolation amplification through signal isolation amplifier, and the high frequency division in analog signal is filtered out by low-pass filter
Amount and the conversion of absolute value converting unit, by the range self-adapting unit that is controlled by first processor according to input analog signal
Wave-shape amplitude carry out automatic range switching, will acquisition analog signal amplify after send to A/D sampling unit, A/D sampling is single
Member is converted into continuous acquisition analog signal to transport to first processor after digital signal, and first processor adopts the electric current of reading
Sample data carry out operation, screen and obtain the current effective value of waveform and the failure instantaneous value of jump-value of current, and electric current is effective
The characteristic quantity that the failure instantaneous value of value and jump-value of current is triggered as data record, when meeting any of the above characteristic quantities
At the time of generation for failure, the fault data that the moment occurs for failure is cached in dual-ported memory, second processor receives double
The fault data of port store is simultaneously communicated by network interface and host computer, and host computer receives fault data and draws waveform pair
Short-circuit current of near zone of transformer carries out real-time monitoring, while second processor is counted and is stored into received fault data
The memory of large capacity.
The current effective value is the current value of 1ms-20ms time interval and load current in 0.1A~5A.
The failure instantaneous value of the jump-value of current is greater than 50A in 100ms to the load current between 1s for the duration
Current value.
Second processor is to generation event current maxima, the size of rush of current amount and number of shocks and punching during operation
It hits time failure data to be counted, data interaction is carried out by the memory and Managing system of above position machine of large capacity, by transformation
The maximum value of device secondary circuit short-circuit dash current, the size of rush of current amount and number of shocks are supplied to running state of transformer and comment
Estimate use.
The present invention is measurement member by the three-phase noninductive resistance being connected on each phase current mutual inductor of Circuit Fault on Secondary Transformer
Part, therefore can be to the electric current real-time monitoring for flowing through transformer winding, and noninductive resistance does not have shadow to secondary loop of mutual inductor
It rings, isolation amplification is carried out to the analog signal on noninductive resistance by isolated amplifier, filters out signal using low-pass filter
In high fdrequency component, exchange is converted to by direct current by absolute value converting unit, can be according to input by range adaptive unit
Acquisition signal amplify and is sent to A/D sampling unit and sample by the amplitude automatic switching range of signal, and first processor is to calmly
When the data that obtain carry out the screening of operation, obtain the virtual value and failure instantaneous value of waveform, and by current effective value and electric current
Two characteristic quantities that the failure instantaneous value of Sudden Changing Rate is triggered as data record, when any one characteristic quantity can determine failure
At the time of, the fault data that the moment occurs for failure is cached in dual-ported memory, it can be to the current break logout of generation
The fault datas such as waveform, virtual value and time of origin screen and record useful current data, can reach response rapidly,
And the short circuit current after becoming steady can be captured, there is preferable stable state and transient performance, the present invention is in acquisition transformer two
The real time data of current waveform, is cached in dual-ported memory, second processing for fault data under secondary side is normal and fault condition
The fault data that device receives dual-ported memory connects host computer through network interface, receives fault data by host computer and draws wave
Shape carries out real-time monitoring to short-circuit current of near zone of transformer, so that passing through simultaneously to the monitoring more intuitive and convenient of short circuit current
Second processor counts fault data, and to occurring during operation, event current maxima, the size of rush of current amount and impact are secondary
The fault datas such as several and attack time are counted, for Condition Maintenance Method of Transformer decision system provide strong data foundation with
It supports.The present invention carries out operation and screening to sampled data by first processor, by second processor to fault data into
Row statistics and communication, monitor system run all right, and functional reliability is good, and integrated level is high, are able to satisfy live use demand.
Detailed description of the invention
Fig. 1 is that short-circuit current of near zone of transformer real-time monitoring device of the present invention connects structural block diagram on the transformer.
Fig. 2 is the structural block diagram of short-circuit current of near zone of transformer real-time monitoring device of the present invention.
Specific embodiment
As shown in FIGS. 1 and 2 short circuit monitoring method in power transformer near region of the invention, the three-phase current of Circuit Fault on Secondary Transformer
Be serially connected with three-phase noninductive resistance on mutual inductor respectively, three-phase noninductive resistance by the analog signal of acquisition through signal isolation amplifier into
Row isolation amplification filters out high fdrequency component and the conversion of absolute value converting unit in analog signal by low-pass filter, will exchange
Electricity is converted to direct current, by the range self-adapting unit that is controlled by first processor according to the wave-shape amplitude of input analog signal
Carry out automatic range switching, analog signal is amplified in a suitable range, will acquisition analog signal amplify after send to
In A/D sampling unit, A/D sampling unit transports to first processor after the analog signal of continuous acquisition is converted into digital signal,
First processor carries out operation to the current sampling data of reading, and most common work when being analyzed signal and being handled can be used
Tool one of fast Fourier transformation operation, screen and obtain waveform current effective value and jump-value of current failure it is instantaneous
Value, the characteristic quantity that the failure instantaneous value of current effective value and jump-value of current is triggered as data record meet any one
At the time of characteristic quantity determines that failure occurs, the fault data that the moment occurs for failure is cached in dual-ported memory, electric current is effective
Value is the current value of 1ms-20ms time interval and load current in 0.1A~5A, and the failure instantaneous value of jump-value of current is
Duration is greater than the current value of 5A~50A in 100ms to the load current between 1s, to the current break logout of generation
Waveform, virtual value and time of origin fault data, second processor receive the fault data of dual-ported memory and pass through net
Network interface and host computer communicate, and host computer receives fault data and draws waveform and supervised in real time to short-circuit current of near zone of transformer
It surveys, while second processor counts received fault data and is stored into the memory of large capacity, second processor pair
Event current maxima, the size of rush of current amount and number of shocks occurs during operation and attack time fault data is united
Meter carries out data interaction by the memory and Managing system of above position machine of large capacity, by Short Circuit Fault on Secondary Transformer dash current
Maximum value, the size of rush of current amount and number of shocks be supplied to running state of transformer assessment use, be transformer state
Maintenance decision system provides strong data foundation and support.
As shown in FIGS. 1 and 2 short-circuit current of near zone of transformer real-time monitoring device of the present invention, including three-phase noninductive resistance, letter
Number acquisition unit, central processing unit and communication unit and host computer, the noninductive resistance is using four pin configurations without electrification
Resistance, not only small in size, resistance value is optional, and signal processing circuit is simple, and measurement accuracy is high, does not have shadow to secondary loop of mutual inductor
It rings, is suitable for secondary circuit transformation feature.Signal acquisition unit of the invention includes sequentially connected signal isolation amplifier, low
Bandpass filter, absolute value converting unit and range self-adapting unit and A/D acquisition unit, are serially connected in Circuit Fault on Secondary Transformer respectively
Threephase current transformer on three-phase noninductive resistance connect the input terminal of signal isolation amplifier, will be taken by three-phase noninductive resistance
The electric current of sample current transformer loop, ISO series isolated amplifier can be used in isolated amplifier of the invention, on noninductive resistance
Analog signal carry out isolation amplification, low-pass filter of the invention can be used RC low-pass filter, filter by low-pass filter
Except the high fdrequency component in signal, absolute value converting unit can be used absolute value converter and exchange be converted to direct current, and pass through the
Adaptive range switching is carried out under the control of complex programmable logic device (CPLD) in one processor, and signal is amplified to one
It is sent in suitable range to A/D sampling unit and is sampled, there are the optional DTE3216 collection plate of A/D sampling unit 16 100KHz to adopt
The A/D converter of sample rate samples normal duty current waveform and fault current waveform high-speed.
As shown in FIGS. 1 and 2 central processing unit of the invention includes at first to signal acquisition operation and screening
It manages device, dual-ported memory and for the second processor to data statistics and communication, dual-ported memory passes through data/address bus
It is connect respectively with first processor and second processor, IDT70V9289 can be used in dual-ported memory, and first processor uses
TMS320F2812 can be selected in dsp processor, dsp processor, and TMS320F2812 is the C2000 platform that TI company, the U.S. releases
On 32 bit DSP chip of fixed point, operation clock may be up to 150MHz, process performance is up to 150MIPS, for 128: 32
The fft algorithm (Q30) of position real number, execution time only need 6763 instruction cycles, arithmetic speed superior performance, and second processor is adopted
With arm processor, the LPC2220 microprocessor of Phillips is can be used in arm processor, and LPC2220 microcontroller is a branch
Hold 32/16 ARM7TDMI-S CPU of real-time simulation and insertion tracking, the encapsulation of 144 feet, extremely low power consumption, multiple 32 bit timings
Device, 8 tunnel 10 ADC, PWM output and up to 9 external interrupt pins have small-sized, quick, low energy consumption, in integrated form RISC
The features such as core.The input terminal of the output termination first processor of A/D acquisition unit of the present invention, electric current of the first processor to reading
Sampled data carry out Fast Fourier Transform (FFT), that is, FFT operation, the characteristic quantity triggered using jump-value of current as data record and with
The characteristic quantity that current effective value is triggered as data record is determined by two characteristic quantities and carries out short circuit at the time of failure occurs
Differentiate, screening obtains the current effective value of waveform and the failure instantaneous value of jump-value of current, and the fault data filtered out is cached
Second processor is then sent through to dual-ported memory.Communication unit of the invention includes network interface and PORT COM, at second
Reason device is connect with network interface and PORT COM, and network interface and host computer connecting communication, final waveform are passed by network interface
To host computer and waveform is drawn, directly short circuit current is monitored, which can be used Ethernet interface, second processor
It being connect by PORT COM with mass storage, Ethernet interface of the invention uses DM9000AE chip, and the chip volume is small,
With AUTO-Midx (supporting direct interconnection automatic turning) TCP/IP acceleration function, access time 20nsl/o can mitigate
The burden of second processor effectively improves the efficiency of whole device.PORT COM of the present invention is connect with mass storage, and second
Processor counts received fault data and is stored into the memory of large capacity, and second processor occurs to during operation
Event current maxima, number fault data are counted, by the exchange of the memory realization local data of large capacity, or with
Managing system of above position machine carries out data interaction.
Claims (1)
1. a kind of power transformer near region short circuit monitoring method, it is characterised in that:
It is serially connected with three-phase noninductive resistance on the threephase current transformer of Circuit Fault on Secondary Transformer respectively, three-phase noninductive resistance is by acquisition
Analog signal carries out isolation amplification through signal isolation amplifier, by low-pass filter filter out high fdrequency component in analog signal and
The conversion of absolute value converting unit, by the range self-adapting unit that is controlled by first processor according to the wave of input analog signal
Shape amplitude carries out automatic range switching, send after the analog signal of acquisition is amplified to A/D sampling unit, and A/D sampling unit will
The analog signal of continuous acquisition transports to first processor, current sample number of the first processor to reading after being converted into digital signal
According to operation is carried out, screen and obtain the current effective value of waveform and the failure instantaneous value of jump-value of current, by current effective value and
The characteristic quantity that the failure instantaneous value of jump-value of current is triggered as data record determines what failure occurred by two characteristic quantities
Moment carries out short circuit discrimination, the fault data that the moment occurs for failure is cached in dual-ported memory, second processor receives double
The fault data of port store is simultaneously communicated by network interface and host computer, and host computer receives fault data and draws waveform pair
Short-circuit current of near zone of transformer carries out real-time monitoring, while second processor is counted and is stored into received fault data
The memory of large capacity；
Wherein, isolated amplifier uses ISO series isolated amplifier, carries out isolation amplification to the analog signal on noninductive resistance,
Low-pass filter uses RC low-pass filter, filters out the high fdrequency component in signal, absolute value converting unit by low-pass filter
Absolute value converter can be used, exchange is converted into direct current, and passes through the complex programmable logic device (CPLD) in first processor
Control under carry out adaptive range switching, signal is amplified in a suitable range send to A/D sampling unit sample, A/
D sampling unit selects DTE3216 collection plate, the A/D converter with 16 100KHz sample rates, to normal duty current waveform and
The sampling of fault current waveform high-speed；
First processor carries out Fast Fourier Transform (FFT), that is, FFT operation to the current sampling data of reading；
Second processor is to occurring event current maxima, the size of rush of current amount and number of shocks and impact during operation when
Between fault data counted, data interaction is carried out by the memory of large capacity and Managing system of above position machine, by transformer two
The maximum value of secondary side short-circuit impact electric current, the size of rush of current amount and number of shocks, which are supplied to running state of transformer assessment, to be made
With.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610899333.1A CN106291084B (en) | 2012-03-15 | 2012-03-15 | A kind of power transformer near region short circuit monitoring method |
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610899333.1A CN106291084B (en) | 2012-03-15 | 2012-03-15 | A kind of power transformer near region short circuit monitoring method |
| CN201210068241.0A CN102565524B (en) | 2012-03-15 | Real-time monitoring method for short-circuit current of near zone of transformer |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201210068241.0A Division CN102565524B (en) | 2012-03-15 | 2012-03-15 | Real-time monitoring method for short-circuit current of near zone of transformer |
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| CN106291084A CN106291084A (en) | 2017-01-04 |
| CN106291084B true CN106291084B (en) | 2019-03-15 |
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| CN201610900109.XA Active CN106526300B (en) | 2012-03-15 | 2012-03-15 | Short-circuit current of near zone of transformer real-time monitoring device |
| CN201610900110.2A Active CN106291085B (en) | 2012-03-15 | 2012-03-15 | Short-circuit current of near zone of transformer monitoring method |
| CN201610900108.5A Active CN106501588B (en) | 2012-03-15 | 2012-03-15 | A kind of short-circuit current of near zone of transformer monitoring method |
| CN201610899333.1A Active CN106291084B (en) | 2012-03-15 | 2012-03-15 | A kind of power transformer near region short circuit monitoring method |
| CN201610899965.8A Active CN106443155B (en) | 2012-03-15 | 2012-03-15 | Power transformer near region short circuit monitoring method |
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| CN201610900109.XA Active CN106526300B (en) | 2012-03-15 | 2012-03-15 | Short-circuit current of near zone of transformer real-time monitoring device |
| CN201610900110.2A Active CN106291085B (en) | 2012-03-15 | 2012-03-15 | Short-circuit current of near zone of transformer monitoring method |
| CN201610900108.5A Active CN106501588B (en) | 2012-03-15 | 2012-03-15 | A kind of short-circuit current of near zone of transformer monitoring method |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN106597181B (en) * | 2017-02-13 | 2023-06-02 | 云南电网有限责任公司电力科学研究院 | Operation monitoring system and method for high-voltage power transformer |
| CN107102195B (en) * | 2017-04-26 | 2020-03-20 | 顺特电气设备有限公司 | Electric quantity processing and network transmission method of intelligent transformer terminal |
| CN110794331B (en) * | 2019-11-12 | 2021-05-04 | 西南交通大学 | Track traffic traction transformer turn-to-turn short circuit detection and protection device |
| CN111489099B (en) * | 2020-04-23 | 2022-10-11 | 国网江西省电力有限公司电力科学研究院 | On-site operation risk assessment method for short-circuit resistance of transformer |
| CN111880020A (en) * | 2020-04-27 | 2020-11-03 | 深圳华工能源技术有限公司 | Fault recording data generation method and device for power distribution and utilization system of power consumer |
| CN111983350B (en) * | 2020-08-11 | 2022-09-02 | 云南电网有限责任公司电力科学研究院 | Method for analyzing current impact on power transformer |
| CN112816917B (en) * | 2021-04-16 | 2021-07-13 | 成都工百利自动化设备有限公司 | Transformer impact monitoring device |
| CN113985135A (en) * | 2021-11-01 | 2022-01-28 | 成都府河电力自动化成套设备有限责任公司 | Transformer short circuit impact on-line monitoring device and monitoring method |
| CN116522739B (en) * | 2023-06-29 | 2023-09-26 | 南昌科晨电力试验研究有限公司 | Transformer short-circuit impact control method and system based on data analysis |
| CN116665425B (en) * | 2023-08-02 | 2023-10-10 | 山西阳风新能售电有限公司 | Monitoring and early warning method and system for power supply |
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2012
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Also Published As
| Publication number | Publication date |
|---|---|
| CN106526300A (en) | 2017-03-22 |
| CN106291085A (en) | 2017-01-04 |
| CN102565524A (en) | 2012-07-11 |
| CN106291084A (en) | 2017-01-04 |
| CN106291085B (en) | 2019-04-02 |
| CN106443155A (en) | 2017-02-22 |
| CN106526300B (en) | 2019-07-09 |
| CN106501588B (en) | 2019-06-11 |
| CN106501588A (en) | 2017-03-15 |
| CN106443155B (en) | 2019-04-02 |
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