CN1605879A - Testing method for on-line monitoring internal insulation incipient fault of electric equipment - Google Patents

Testing method for on-line monitoring internal insulation incipient fault of electric equipment Download PDF

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Publication number
CN1605879A
CN1605879A CN 200310110421 CN200310110421A CN1605879A CN 1605879 A CN1605879 A CN 1605879A CN 200310110421 CN200310110421 CN 200310110421 CN 200310110421 A CN200310110421 A CN 200310110421A CN 1605879 A CN1605879 A CN 1605879A
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China
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power equipment
line monitoring
testing
signal
electrical insulation
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CN 200310110421
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Chinese (zh)
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欧阳南尼
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欧阳南尼
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Priority to CN 200310110421 priority Critical patent/CN1605879A/en
Publication of CN1605879A publication Critical patent/CN1605879A/en
Pending legal-status Critical Current

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Abstract

The invention discloses a testing method for on-line monitoring internal insulation incipient fault of electric equipment, wherein a sensing unit is employed for collecting collision high-frequency heavy current signal from power transmission bus wire and earthed sheathed tube port, the correlation between the waveform, amplitude and time of the collected shock transient signal is utilized to select the excitation signal and response signal of the power equipment transfer function and establish the internal transfer function curve of the power equipment.

Description

A kind of method of testing of on-line monitoring power equipment built-in electrical insulation hidden danger
Technical field
The present invention relates to the method for testing of a kind of on-line monitoring power equipment built-in electrical insulation hidden danger in the power transmission and transformation system, be suitable for the on-line monitoring of power equipment in the electric system 35kV-150kV transformer station (as: transformer, mutual inductor, lightning arrester, isolating switch) state maintenance.
Background technology
At present, the home and abroad to power equipment built-in electrical insulation hidden danger Study on Online Monitoring work carried out many year, people have researched and developed the online detection that the multiple technologies method is used for power equipment built-in electrical insulation hidden danger, as: temperature method, pressure application, chromatography, ultrasonic method, pulse current method, ultrahigh frequency method etc.But the method that has adopted at present all can not prevent the generation of power equipment catastrophic discontinuityfailure effectively.Therefore, people still have to take the measure of interruption maintenance in order to find the built-in electrical insulation hidden danger of power equipment in advance, thereby have seriously influenced normal electric power supply.
Power equipment in the power transmission and transformation system mainly is the transmission of finishing the electric power energy, power equipment manufacture and design finish after, its various parameter values have determined that as resistance, inductance, electric capacity both the internal delivery function of power equipment is also just determined.Power equipment is in operation, be subjected to the influence of various factors, the built-in electrical insulation performance changes, and makes its parameter value and transport function also change, therefore as long as detect the variation of power equipment internal delivery function, just can reflect the situation of power equipment built-in electrical insulation hidden danger in real time.
Summary of the invention
The purpose of this invention is to provide a kind of method of testing that adopts transfer function method to come on-line monitoring power equipment built-in electrical insulation hidden danger, be exactly in the substation operation process, take the way that do not have a power failure, power equipment built-in electrical insulation performance is carried out on-line monitoring and assessment, the slip-stick artist of power department can be according to the result of monitoring, and whether the decision power equipment interruption maintenance.
The technical solution adopted in the present invention is: a kind of method of testing of on-line monitoring power equipment built-in electrical insulation hidden danger, it is characterized in that adopting sensor from the electric power transfer bus, the port of grounding sleeve is gathered and is impacted the big current signal of high frequency, and according to the impact transient signal waveform of being gathered, amplitude, the mutual relationship of time, choose the pumping signal and the response signal of power equipment transport function, set up the internal delivery function curve of power equipment, and the changing condition of internal delivery function curve and the shock wave shape of record during according to each impact, come analysis and judgement power equipment built-in electrical insulation hidden danger situation.
Sensor of the present invention is strong magnetostriction non-crystaline amorphous metal sensor.Strong magnetostriction non-crystaline amorphous metal sensor adopts non-core-theaded type mounting means to be installed on electric power transfer bus and the grounding sleeve.The signal of its collection adopts the opto-electronic conversion mode, is transferred to computing machine at a distance by fiber optic cables.
The present invention to the signal of real-time collection, utilizes the calculating function to carry out the calculating of transfer curve automatically in transformer station does not have a power failure operational process.When if transfer curve changes, can adopt the electric capacity delivered current to show that the method for wound, neutral point current show the variation of input and output waveform when hindering method on-line analysis power equipment suffers the high frequency heavy current impact, variation characteristic according to waveform, can quantitative test power equipment built-in electrical insulation damage status, determine time and the extent and scope of the damage of power equipment built-in electrical insulation to substation operation harm, keep in repair for whether the Electrical Engineer determines transformer station to have a power failure, the reliable detection data are provided.The present invention mainly is the waveform that the power equipment built-in electrical insulation is produced the big electric current of impact high frequency of harm by on-line measurement; the effective value of amplitude and measurement power frequency load current; peak value; satisfy the function of on-line analysis power equipment built-in electrical insulation hidden danger and the function of metering power equipment load current size; and can provide real measurement data and guard signal fast for the Electrical Engineer; therefore can take precautions against the generation of power equipment catastrophic discontinuityfailure in the power transmission and transformation system effectively; for the electric power netting safe running of safeguarding in the electric system; guarantee high speed development of national economy; ensure the people's normal life order, will bring huge economic benefit and social benefit.The present invention also can be strong the power transmission and transformation system implemented of promotion power department in the process of status of electric power maintenance mechanism, it will bring huge change for the maintenance and the maintenance of power equipment.
Description of drawings
Fig. 1 is the embodiment of the invention 1 a described transformer online monitoring wiring diagram;
Fig. 2 is the embodiment of the invention 2 described mutual inductor on-line monitoring wiring diagrams;
Fig. 3 is the embodiment of the invention 3 described lightning arrester on-line monitoring wiring diagrams;
Fig. 4 is the embodiment of the invention 4 described isolating switch on-line monitoring wiring diagrams.
Embodiment
Embodiment 1: the method for testing of on-line monitoring transformer built-in electrical insulation hidden danger.
As shown in Figure 1:
1, from adopting non-core-theaded type mounting means to be installed in strong magnetostriction non-crystaline amorphous metal sensor K1 on the transformer high-voltage sleeve pipe, K2, strong magnetostriction non-crystaline amorphous metal sensor K3 on the neutral bushing, K4, strong magnetostriction non-crystaline amorphous metal sensor K5 on the low-tension bushing, K6, strong magnetostriction non-crystaline amorphous metal sensor K7 on the iron core grounding sleeve pipe, K8 gathers and impacts pumping signal and the response signal of the big current signal of high frequency as the transformer transport function, the transfer curve of wave process when calculating high frequency heavy current impact transformer each time, variation according to transfer curve, the big current waveform data of the impact high frequency of anacom data-base recording, and the conventionally test that cooperates other carries out real-time assessment and insulation hidden danger fault diagnosis to transformer insulated performance.
2, from adopting non-core-theaded type mounting means to be installed in strong magnetostriction non-crystaline amorphous metal sensor K1, K2 on the transformer high-voltage sleeve pipe, strong magnetostriction non-crystaline amorphous metal sensor K3, K4 on the neutral bushing obtain signal, the switching time of on-line monitoring on-load tap-changer of transformer and arcing waveform, variation according to switching time and waveform, the time of anacom data-base recording and Wave data carry out real-time assessment and fault diagnosis to the mechanical property and the electric property of on-load tap-changer of transformer.
3, from adopting non-core-theaded type mounting means to be installed in the strong magnetostriction non-crystaline amorphous metal sensor K9 that shield at transformer condenser-type terminal ground connection end, K10, K11, K12 gathers and impacts pumping signal and the response signal of the big current signal of high frequency as the condenser-type terminal transport function, the transfer curve of wave process when calculating high frequency heavy current impact sleeve pipe each time, variation according to transfer curve, the big current waveform of gathering of high frequency is researched and analysed, and the conventionally test that cooperates other carries out real-time assessment and fault diagnosis to transformer condenser-type terminal insulating property.
The signal that above-mentioned strong magnetostriction non-crystaline amorphous metal sensor K1, K2, K3, K4, K5, K6, K7, K8, K9, K10, K11, K12 gather adopts the opto-electronic conversion mode, is transferred to computing machine at a distance by fiber optic cables.
Embodiment 2: the method for testing of on-line monitoring mutual inductor built-in electrical insulation hidden danger.
As shown in Figure 2:
From adopting non-core-theaded type mounting means to be installed in strong magnetostriction non-crystaline amorphous metal sensor K1 on the mutual inductor bushing, K2, strong magnetostriction non-crystaline amorphous metal sensor K3 on the grounding sleeve, K4 gathers and impacts pumping signal and the response signal of the big current signal of high frequency as mutual inductor equipment transport function, the transfer curve of wave process when calculating high frequency heavy current impact mutual inductor each time, variation according to transfer curve, the big current waveform of gathering of high frequency is researched and analysed, and the conventionally test that cooperates other carries out real-time assessment and fault diagnosis to the mutual inductor insulating property.
The signal that above-mentioned strong magnetostriction non-crystaline amorphous metal sensor K1, K2, K3, K4 gather adopts the opto-electronic conversion mode, is transferred to computing machine at a distance by fiber optic cables.
Embodiment 3: the method for testing of on-line monitoring lightning arrester built-in electrical insulation hidden danger.
As shown in Figure 3:
From adopting non-core-theaded type mounting means to be installed in strong magnetostriction non-crystaline amorphous metal sensor K1 on the lightning arrester bushing, K2, strong magnetostriction non-crystaline amorphous metal sensor K3 on the grounding sleeve, K4 gathers pumping signal and the response signal of the big current signal of high frequency as lightning arrester equipment transport function, the transfer curve of wave process when calculating high frequency heavy current impact lightning arrester each time, variation according to transfer curve, the big current waveform of gathering of high frequency is researched and analysed, and the conventionally test that cooperates other carries out real-time assessment and fault diagnosis to the lightning arrester insulation performance.
The signal that above-mentioned strong magnetostriction non-crystaline amorphous metal sensor K1, K2, K3, K4 gather adopts the opto-electronic conversion mode, is transferred to computing machine at a distance by fiber optic cables.
Embodiment 4: the method for testing of on-line monitoring isolating switch built-in electrical insulation hidden danger.
As shown in Figure 4:
Obtain signal from the strong magnetostriction non-crystaline amorphous metal sensor K1, K2, K3, K4, K5, the K6 that adopt non-core-theaded type mounting means to be installed on the isolating switch bushing, each arc time and waveform when gathering the isolating switch action, variation according to arc time and waveform, the big current waveform of the high frequency of anacom data-base recording, and the conventionally test that cooperates other carries out real-time assessment and fault diagnosis to breaker mechanical performance and electric property.
The signal that above-mentioned strong magnetostriction non-crystaline amorphous metal sensor K1, K2, K3, K4, K5, K6 gather adopts the opto-electronic conversion mode, is transferred to computing machine at a distance by fiber optic cables.
In the foregoing description, sensor adopts strong magnetostriction non-crystaline amorphous metal sensor, and under the effect of the big electric current alternating magnetic field of high frequency, the magnetic field intensity H that it can directly measure the electric power transfer bus effectively carries out the conversion of electromagnetic energy.
In the foregoing description, sensor is installed and is adopted non-core-theaded type field engineering, and sensor only just can obtain the big current temporary state signal of high frequency of lightning surge, switching impulse ripple, short-circuit impact ripple and the metering signal of power frequency load current near the electric power transfer bus.
In the foregoing description, photoelectric conversion technique is adopted in the sensor signal transmission, gives computing machine by the fiber optic cables remote transmission signal, can effectively solve the high-voltage insulation technique difficult problem of power equipment in the electrical network.

Claims (4)

1, a kind of method of testing of on-line monitoring power equipment built-in electrical insulation hidden danger, it is characterized in that adopting sensor to gather and impact the big current signal of high frequency from the port of electric power transfer bus, grounding sleeve, and according to impact transient signal waveform, amplitude, the mutual relationship of time of being gathered, choose the pumping signal and the response signal of power equipment transport function, set up the internal delivery function curve of power equipment, and the changing condition of internal delivery function curve and the shock wave shape of record during according to each impact, analysis and judgement power equipment built-in electrical insulation hidden danger situation.
2, the method for testing of a kind of on-line monitoring power equipment built-in electrical insulation hidden danger according to claim 1 is characterized in that described sensor is strong magnetostriction non-crystaline amorphous metal sensor.
3, the method for testing of a kind of on-line monitoring power equipment built-in electrical insulation hidden danger according to claim 2 is characterized in that strong magnetostriction non-crystaline amorphous metal sensor adopts non-core-theaded type mounting means to be installed on electric power transfer bus and the grounding sleeve.
4,, it is characterized in that the signal of gathering adopts the opto-electronic conversion mode, is transferred to computing machine at a distance by fiber optic cables according to the method for testing of claim 1 or 2 or 3 described a kind of on-line monitoring power equipment built-in electrical insulation hidden danger.
CN 200310110421 2003-10-11 2003-10-11 Testing method for on-line monitoring internal insulation incipient fault of electric equipment Pending CN1605879A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CN 200310110421 CN1605879A (en) 2003-10-11 2003-10-11 Testing method for on-line monitoring internal insulation incipient fault of electric equipment

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CN 200310110421 CN1605879A (en) 2003-10-11 2003-10-11 Testing method for on-line monitoring internal insulation incipient fault of electric equipment

Publications (1)

Publication Number Publication Date
CN1605879A true CN1605879A (en) 2005-04-13

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Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN100401080C (en) * 2006-02-20 2008-07-09 武汉华电国电高压科技发展有限公司 On-line monitoring method and system for converting station high voltage electrical apparatus
CN102621458A (en) * 2012-03-20 2012-08-01 上海市电力公司 Cable partial discharge detecting system
CN102650654A (en) * 2012-05-14 2012-08-29 云南电力试验研究院(集团)有限公司电力研究院 Operation performance on-line assessment method for power transformer iron core and clamping piece grounding current monitoring device

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN100401080C (en) * 2006-02-20 2008-07-09 武汉华电国电高压科技发展有限公司 On-line monitoring method and system for converting station high voltage electrical apparatus
CN102621458A (en) * 2012-03-20 2012-08-01 上海市电力公司 Cable partial discharge detecting system
CN102650654A (en) * 2012-05-14 2012-08-29 云南电力试验研究院(集团)有限公司电力研究院 Operation performance on-line assessment method for power transformer iron core and clamping piece grounding current monitoring device

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