CN103091609A - Performance detecting system and method thereof of gas insulated substation (GIS) partial discharge on-line monitoring device - Google Patents
Performance detecting system and method thereof of gas insulated substation (GIS) partial discharge on-line monitoring device Download PDFInfo
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Abstract
The invention relates to a performance detecting system and a method thereof of a gas insulated substation (GIS) partial discharge on-line monitoring device. Through a partial discharge measuring device and the GIS partial discharge on-line monitoring device connected to the exterior of a GIS or interior of the GIS of a GIS pipeline, the partial discharge measuring device and the GIS partial discharge on-line monitoring device are compared with each other to detect the performance of the GIS partial discharge on-line monitoring device. The GIS pipeline of the performance detecting system of the GIS partial discharge on-line monitoring device can carry out testing to different on-line monitoring devices, and at the same time, the pipeline with an independent structure is convenient to dismantle and can simulate different insulation defects. Meanwhile, the invention further discloses the method using the performance detecting system to detect the on-line monitoring device.
Description
Technical field
The application relates to the high voltage power transmission field, relates to especially a kind of GIS local discharge on-line monitoring device performance detecting system, and the method for utilizing this system that described on-Line Monitor Device is checked.
Background technology
SF
6Gas insulated combined electrical equipment (Gas Insulated Substation, GIS) be a kind of Novel electric appliance device that occurs the seventies in previous generation, it is combined in the electrical equipment closed group such as isolating switch, disconnector, high speed grounding switch, voltage transformer (VT), current transformer, lightning arrester, part bus, sleeve pipe and/or cable termination in the metal shell of ground connection, with SF
6Gas is as insulating medium, and the interior transmission of electricity of GIS bus, connects various electrical equipments, uses air as the method for insulation with bare conductor thereby replaced in electric substation in the past as supports insulative with the epoxy disc insulator, and its effect is equivalent to a switchyard.GIS has that spatial volume is little, floor area is few, is not affected by the external environment, the advantage such as safe and reliable to operation, has been widely used in the high pressure power transmission and transformation systems such as urban electricity supply, generating plant, large industrial enterprise, petrochemical complex, metallurgy and railway electrification.
Although use GIS, many as mentioned above advantages are arranged, also have the service work complexity simultaneously, technological requirement is meticulous, in case the shortcoming of the serious problem of the consequence that breaks down.
To State Maintenance (Condition Based Maintenance, CBM) future development, the on-line monitoring and fault diagonosing technology is the important evidence of State Maintenance to the maintenance mode of GIS.To the on-line monitoring of GIS, the monitoring shelf depreciation is effective method.Shelf depreciation is sign and the form of expression of GIS insulation degradation, is again further deteriorated reason of insulation.The partial discharge monitoring of GIS, due to the singularity of GIS structure, can be divided into the non electrical quantity on-line monitoring methods such as the electricity on-line monitoring method such as pre-buried electrode method, ultrahigh frequency detection method and mechanical vibration monitoring method in outer electrode method, ground wire Electromagnetic coupling method, insulator, gas detection method, optical detection.But the GIS local discharge on-line monitoring device of present stage, before installation, can't assess its on-the-spot antijamming capability, shelf depreciation station-keeping ability and Fault Pattern Recognition ability, Operation of Electric Systems department also can't trust the shown result of on-Line Monitor Device fully, only interruption maintenance just can be verified after GIS generation problem, this situation is unfavorable for the safe and reliable operation of electric system also being unfavorable for the realization of " repair based on condition of component ".
Therefore technical matters to be solved by this invention is:
1, how before use the GIS local discharge on-line monitoring device to be detected, and further can proofread and correct it, in order to provide complete believable on-line monitoring result to power department.
2, how to judge before use whether the GIS local discharge on-line monitoring device can satisfy the needs of real work, for example specifically, whether can resist the impact of thunder and lightning, after the little electric current of disconnector folding capacitive, can on-line monitoring system work normally.
Summary of the invention
For the above-mentioned technical matters to be solved of mentioning, the present invention builds an open GIS local discharge on-line monitoring device performance detecting system, different on-Line Monitor Device can be installed, use the surveying instrument of verification to carry out transmission of quantity value, the accuracy of the on-Line Monitor Device of using distinct methods or principle is detected.
Further, the invention provides and utilize above-mentioned performance detecting system the GIS local discharge on-line monitoring device to be carried out the method for functional check, can carry out functional check and calibration to various GIS local discharge on-line monitoring device.
To this, technical scheme of the present invention is: a kind of GIS local discharge on-line monitoring device performance detecting system, and described system comprises:
250kV transformer and supporting Measurement and Control System are used for providing high-voltage power supply; And described transformer and supporting Measurement and Control System comprise the 250kV high-voltage bleeder, and the high pressure that is used for described 250kV transformer is provided carries out dividing potential drop, are convenient to measure in order to reduce to low-voltage;
The GIS pipeline, the electric pressure of described GIS pipeline is 110kV, and is single-phase, and the both sides of described GIS pipeline have sleeve pipe, in pipeline, also with disconnector, described each section of pipeline is dismountable absolute construction, local discharging level＜5pC under 87kV;
Direct current cabinet is for the control gear of the disconnector of described GIS pipe interior provides power supply;
Partial-discharge measuring device, described partial-discharge measuring device are based on pulse current method, partial-discharge measuring device calibration, be used for the ducted shelf depreciation of GIS is measured;
It is characterized in that: the utilization of described GIS pipeline is arranged on GIS inside or the outside various conventional insulation defect of GIS local discharge on-line monitoring device to simulating in the GIS pipeline, monitor, the result that result and the described partial-discharge measuring device of monitoring are measured is compared, thereby reach the purpose that detects GIS local discharge on-line monitoring device performance.
Due to the various conventional insulation defects of simulation in this GIS pipeline, so can connect different on-Line Monitor Device and test.The GIS pipeline of absolute construction not only possesses the characteristics of convenient disassembly, and is convenient to simulate various insulation defect.Like this, this performance detecting system can be simulated different insulation defects, and can different on-Line Monitor Device be detected.
In addition, the invention also discloses and a kind ofly utilize described performance detecting system the GIS local discharge on-line monitoring device to be carried out the method for functional check: comprise the steps:
A. GIS local discharge on-line monitoring device to be detected is pressed its on-the-spot mounting means, be connected with described GIS pipeline, simulate respectively the insulation defect of different mode in described pipeline, give described GIS pipeline making alive by described sleeve pipe, record the partial discharge inception voltage that described on-Line Monitor Device records, and examine it to the identification of defect mode and the station-keeping ability of defect point;
B. use the described shelf depreciation that the GIS pipeline of GIS local discharge on-line monitoring device to be checked is housed of described partial-discharge measuring device monitoring based on the pulsed discharge method, and record partial discharge inception voltage, with partial discharge inception voltage's contrast that described on-Line Monitor Device records, relatively both sensitivity.
Description of drawings
Fig. 1 is according to exemplary GIS local discharge on-line monitoring device performance detecting system figure of the present invention;
Fig. 2 is the front elevation according to a kind of exemplary GIS pipeline of the present invention;
Fig. 3 is the vertical view of GIS pipeline shown in Figure 2.
Wherein 1.250KV transformer and supporting Measurement and Control System, 2. protective resistance, 3.GIS pipeline, 4. analog insulation defect model, 5. sleeve pipe, 6. on-line monitoring interface, 7. on-Line Monitor Device, 8. external antenna sensor, 9. disconnector.
Embodiment
Below in conjunction with accompanying drawing, in the mode of embodiment, technical scheme of the present invention is described.
Embodiment 1:
Referring to accompanying drawing 1, for GIS local discharge on-line monitoring device performance detecting system of the present invention, wherein 250kV transformer and Measurement and Control System 1 thereof include the 250kV high-voltage bleeder, the high pressure that is used for described 250kV transformer is provided carries out dividing potential drop, be convenient to measure in order to reduce to low-voltage, be intended to build the high-voltage power supply environment of described performance detecting system.
In an example, the parameter of 250kV transformer is: input voltage: AC:0 ~ 400V; Output voltage: 0 ~ 250kV, capacity: 250kVA; Impedance voltage:＜8%; Open circuit loss:＜5%; Voltage distortion:＜3%.
Comprise the 250kV high-voltage bleeder in 250kV transformer and supporting Measurement and Control System 1, be used for high pressure is carried out dividing potential drop, in an example, the parameter of 250kV high-voltage bleeder is: intrinsic standoff ratio is 1000:1; Measuring voltage: AC:0 ~ 250kV; Precision: 1.5 grades; Working temperature :-25 ℃ ~ 40 ℃.Protective resistance 2 prevents that for transformer provides overvoltage protection in test, emergent large electric current causes damage to transformer.
Further, in an example, described analog insulation defective can be imitated various conventional insulation defects, includes but not limited to typical electric discharge type such as burr, metal suspension thing etc.
Further, pipeline can arrange the on-line monitoring interface 6 of an opening form, and there is no SF
6Situation under open described pipeline by this interface and be convenient to put into the analog insulation defect model.
Described performance detecting system also comprises direct current cabinet, and Main Function is that the control gear for disconnector in the GIS pipeline provides power supply.
In an example, direct current cabinet comprises direct supply case, Computerized monitor system, charging module, battery etc., and manufacturer's standard is GB/T 19826-2005; Direct supply case major parameter: input voltage: alternating current 220V ± 15%; Output voltage: direct current 220V; Output current: maximum 9A; The precision of voltage regulation :≤± 0.5%; Environment for use temperature :-10 ℃--+40 ℃.Battery module major parameter: input voltage: alternating current 220V ± 15%; Output current: maximum 10A; Output voltage: direct current 220V; The precision of voltage regulation :≤± 0.5%; Environment for use temperature :-10 ℃--+40 ℃.Battery capacity: 40Ah Computerized monitor system major function: overvoltage, undervoltage alarm function, battery management function, output control etc.
For above-described embodiment, also can monitor the interior shelf depreciation of pipeline through the partial-discharge measuring device of calibration, record the shelf depreciation initial voltage, the shelf depreciation initial voltage of the different on-Line Monitor Device 7 that loads in monitoring result and described performance detecting system compares, in order to on-Line Monitor Device 7 is calibrated.
Preamble is mentioned, in another embodiment, the GIS pipeline can be with on-line monitoring interface 6, the form of this on-line monitoring interface 6 is that the form of opening is to put into sensor, described sensor is the part of on-Line Monitor Device 7, thereby is more convenient for inner at GIS or the described GIS local discharge on-line monitoring device of outside installation by described sensor.Described on-Line Monitor Device can also comprise that except having the sensor of the described GIS of putting into pipeline the external antenna sensor is to carry out the monitoring of multi-form GIS pipeline shelf depreciation.
Embodiment 2:
The present embodiment is identical with the structure of embodiment 1, and different is that the shelf depreciation device that on-Line Monitor Device 7 is calibrated can be various shelf depreciation device commonly used.Preferably, this shelf depreciation device is the partial-discharge measuring device based on pulse current method.In an example, described partial-discharge measuring device based on pulse current method is the device of can tracing to the source, and design parameter is: 2 passages, measure sensitivity: 0.1pC; Measure frequency band: 10kHz ~ 500kHz; Pulse resolving time: less than 100 μ s, gain margin-20dB ~+the 40dB fourth gear is adjustable; The calibration pulse generator: the outputting standard rising edge of a pulse is less than 60ns, and negative edge is calibrated quantity of electric charge error＜± 5% greater than 100 μ s.
Embodiment 3:
The present embodiment is identical with the structure of embodiment 1, just further defines the type of on-Line Monitor Device 7.On-Line Monitor Device 7 can be the on-Line Monitor Device of electricity on-line monitoring method and the on-Line Monitor Device of non-electricity on-line monitoring method.Wherein the electricity on-line monitoring method is pre-buried electrode method, ultrahigh frequency detection method in outer electrode method, ground wire Electromagnetic coupling method, insulator.Wherein non-electricity on-line monitoring method is the non electrical quantity on-line monitoring methods such as mechanical vibration monitoring method, gas detection method, optical detection.As mentioned before, described on-Line Monitor Device can be monitored the ducted shelf depreciation of GIS, and it has internal sensor, and it also can have external sensor, also can not possess external sensor.
Embodiment 4:
The present embodiment is identical with the structure of embodiment 1, just further defines the analog insulation defect model.The analog insulation defect model comprises free metal particle defects physical model, metallic pollution defective physical model, void defects physical model and metal protrusion defective physical model between insulator and inner wire, this is only one group of concrete model, have the model of these general types in prior art, these models itself are not that the present invention innovates the place yet.In reality test, selected analog insulation defect model comprises one or more in the defects model.
Should be understood that between embodiment 1-4 and can mutually combine.
Embodiment 5:
In the present embodiment, disclose the GIS local discharge on-line monitoring device performance detecting system that utilizes embodiment 1-4 to build, various on-Line Monitor Device have been carried out functional inspection method.At first GIS local discharge on-line monitoring device to be checked 7 is pressed its on-the-spot mounting means, be installed on GIS pipeline 3, as mentioned before, can be in the inner or outside installation of GIS.Simulate respectively the typical insulation defect model 4 of different mode in described GIS pipeline, give pipeline 3 making alives by sleeve pipe 5, record the partial discharge inception voltage that on-Line Monitor Device 7 records, whether check on-Line Monitor Device 7 can the defect recognition pattern, further, if on-Line Monitor Device has positioning function, examine it whether can position defect point, record the position that actual defects point position and on-Line Monitor Device self poisoning function are located.For example monitor the shelf depreciation of GIS pipeline 3 based on the partial-discharge measuring device of pulsed discharge method, and record partial discharge inception voltage, with partial discharge inception voltage's contrast that on-Line Monitor Device 7 records, relatively both sensitivity, and can be for the calibration to on-Line Monitor Device 7.
Embodiment 6:
The present embodiment is basic identical with embodiment 5, and different is that it is further tested the performance of on-Line Monitor Device 7 under extreme condition of work.This extreme condition of work is Lightening impulse test.The step of this test is:
GIS local discharge on-line monitoring device 7 to be checked is installed on GIS pipeline 3 by the on-the-spot method of operation, pipeline is applied standard lightning impulse, voltage 550kV, positive-negative polarity each 3 times judges whether the rear on-Line Monitor Device 7 of this experiment can work.
Embodiment 7:
The present embodiment is basic identical with embodiment 5, and different is that it has further monitored GIS pipeline isolation switching characteristic, and judgement is in the little electric current experiment of disconnector folding capacitive, and whether on-Line Monitor Device 7 can work.The steps include: GIS local discharge on-line monitoring device 7 to be checked by the on-the-spot method of operation, be connected with GIS pipeline 3, it is the capacitor of 5000pF that GIS pipeline 3 one end sleeve pipes 5 connect electric capacity, the other end 5 applies voltage 63.5kV, disconnecting switch operation folding simultaneously, folding 3 times judges in this experiment and whether the rear on-Line Monitor Device 7 of experiment can work.
Should be understood that between embodiment 5-7 and can mutually combine.For embodiment 6,7, itself and embodiment 5 in conjunction with the time, the order of embodiment 6,7 execution is not done special requirement, as long as can carry out after installing GIS local discharge on-line monitoring device to be checked.
This shows, the present invention has set up a kind of GIS local discharge on-line monitoring device performance detecting system.Particularly by setting up described GIS pipeline, come the insulation fault pattern of the conventional feature of Simulated GlS inside, and the Simulated GlS various over-voltage condition that may run in service.Due to various on-Line Monitor Device can be installed on the GIS pipeline, so the present invention can detect the performance that is arranged on the local discharge on-line monitoring device on GIS, for example detect the accuracy of the identification of its shelf depreciation location, discharge defect pattern, and detect its antijamming capability, certainly, also can check load onto after on-Line Monitor Device whether influential to the insulating property of GIS.By the complete detection to GIS local discharge on-line monitoring device performance, the present invention has improved quality and the confidence level of the on-Line Monitor Device that networks, and department provides reliable on-Line Monitor Device for operation power.This is conducive to the later stage and improves the credible wilfulness of the data that the GIS local discharge on-line monitoring device is monitored, and also is conducive to the insulation status of GIS is assessed accurately, thereby is conducive to fix a breakdown timely and accurately, ensures the safe and reliable operation of electric system.
For example: 1, set up a cover standard square wave standard source, this device can be examined the tested device key property under laboratory environment.2, under laboratory environment, to the experiment of comparing of tested device and laboratory standard source.Control experiment carries out (described defective can be defective mentioned above, but is not limited to this) on the sample with artificial manufacturing defect.Under this laboratory environment condition, tested device partial discharge quantity, waveform and defect recognition function are examined; 3, at the scene under interference environment, to the experiment of comparing of tested device and standard source.Control experiment herein still carries out on the sample with artificial manufacturing defect, but at the scene under interference environment, tested device partial discharge quantity, waveform and defect recognition function is examined.
Given this, the present invention discloses in another embodiment and has a kind ofly utilized previously described performance detecting system the GIS local discharge on-line monitoring device to be carried out the method for functional check, comprises the steps:
A. GIS local discharge on-line monitoring device to be detected is pressed its on-the-spot mounting means, be connected with described GIS pipeline, simulate respectively the insulation defect of different mode in described pipeline, give described GIS pipeline making alive by described sleeve pipe, record the partial discharge inception voltage that described on-Line Monitor Device records, and examine it to the identification of defect mode and the station-keeping ability of defect point;
B. use the described shelf depreciation that the GIS pipeline of GIS local discharge on-line monitoring device to be checked is housed of described partial-discharge measuring device monitoring based on the pulsed discharge method, and record partial discharge inception voltage, with partial discharge inception voltage's contrast that described on-Line Monitor Device records, relatively both sensitivity.
Compare with the embodiment of preamble correlated performance detection system, the present embodiment lays particular emphasis on and utilizes accordingly previously described performance detecting system the GIS local discharge on-line monitoring device to be carried out the method for functional check.
Preferably, in another embodiment, described method also comprises the steps:
C. the described GIS pipeline that GIS local discharge on-line monitoring device to be checked is housed is applied standard lightning impulse, voltage 550kV, then positive-negative polarity each 3 times judges whether described GIS local discharge on-line monitoring device can work.
Preferably, in another embodiment, described method also comprises the steps:
D. connecting electric capacity at the described sleeve pipe of an end of the described GIS pipeline that GIS local discharge on-line monitoring device to be checked is housed is the capacitor of 5000pF, apply voltage 63.5kV on the described sleeve pipe of the other end, operate simultaneously described disconnector folding, folding 3 times, judgement in this step and/or after step described GIS local discharge on-line monitoring device whether can work.
For above-mentioned c, d related embodiment, above-mentioned steps c and d can be respectively be placed on the line monitoring device to GIS office and carry out Lightening impulse test and the little electric current experiment of disconnector folding capacitive, and can the judgement on-Line Monitor Device be used under various conditions normally.The step c of experiment and the order of d are not done concrete requirement, as long as can carry out after to be checked GIS office is placed on the line monitoring device installing.
Above content is in conjunction with concrete preferred implementation further description made for the present invention, can not assert that the specific embodiment of the present invention only limits to this, can mutually combine between above-described embodiment.For the general technical staff of the technical field of the invention, without departing from the inventive concept of the premise, can also make some simple deduction or replace, all should be considered as belonging to the present invention and determine protection domain by claims of submitting to.
Claims (10)
1. GIS local discharge on-line monitoring device performance detecting system, described system comprises:
250kV transformer and supporting Measurement and Control System are used for providing high-voltage power supply; And described transformer and supporting Measurement and Control System comprise the 250kV high-voltage bleeder, and the high pressure that is used for described 250kV transformer is provided carries out dividing potential drop, are convenient to measure in order to reduce to low-voltage;
The GIS pipeline, the electric pressure of described GIS pipeline is 110kV, and is single-phase, and the both sides of described GIS pipeline have sleeve pipe, in pipeline, also with disconnector, described each section of pipeline is dismountable absolute construction, local discharging level＜5pC under 87kV;
Direct current cabinet is for the control gear of the disconnector of described GIS pipe interior provides power supply;
Partial-discharge measuring device, described partial-discharge measuring device are based on pulse current method, partial-discharge measuring device calibration, be used for the ducted shelf depreciation of GIS is measured;
It is characterized in that: the utilization of described GIS pipeline is arranged on GIS inside or the outside various conventional insulation defect of GIS local discharge on-line monitoring device to simulating in the GIS pipeline, monitor, the result that result and the described partial-discharge measuring device of monitoring are measured is compared, thereby reach the purpose that detects GIS local discharge on-line monitoring device performance.
2. performance detecting system according to claim 1 is characterized in that:
Described partial-discharge measuring device is for tracing to the source measuring apparatus, and its parameter is: 2 passages, measure sensitivity: 0.1pC; Measure frequency band: 10kHz ~ 500kHz; Pulse resolving time: less than 100 μ s, gain margin-20dB ~+the 40dB fourth gear is adjustable; The calibration pulse generator: the outputting standard rising edge of a pulse is less than 60ns, and negative edge is calibrated quantity of electric charge error＜± 5% greater than 100 μ s.
3. performance detecting system according to claim 1 is characterized in that:
Described on-Line Monitor Device is the on-Line Monitor Device of electricity on-line monitoring method or non-electricity on-line monitoring method.
4. performance detecting system according to claim 3 is characterized in that:
Described electricity on-line monitoring method is pre-buried electrode method or ultrahigh frequency detection method in outer electrode method, ground wire Electromagnetic coupling method, insulator.
5. performance detecting system according to claim 3 is characterized in that:
Described non-electricity on-line monitoring method is mechanical vibration monitoring method, gas detection method or optical detection etc.
6. the described performance detecting system of any one according to claim 1-5 is characterized in that:
Put into the analog insulation defect model at described GIS pipeline, to simulate the shelf depreciation situation under this defect model.
7. performance detecting system according to claim 6 is characterized in that:
The described analog insulation defect model of putting into comprises the one or more of the group that is comprised of void defects model between free metal particle defects model, metallic pollution defect model, insulator and inner wire and metal protrusion defect model, putting into different models is in order to simulate different shelf depreciation situations, with recognition function and the positioning function of examination on-Line Monitor Device to different defect modes, described recognition function refers to the recognition capability to above-mentioned model, and described positioning function refers to the station-keeping ability to defect point.
8. one kind is utilized that in claim 1-7, the described performance detecting system of any one carries out the method for functional check to the GIS local discharge on-line monitoring device: comprise the steps:
A. GIS local discharge on-line monitoring device to be detected is pressed its on-the-spot mounting means, be connected with described GIS pipeline, simulate respectively the insulation defect of different mode in described pipeline, give described GIS pipeline making alive by described sleeve pipe, record the partial discharge inception voltage that described on-Line Monitor Device records, and examine it to the identification of defect mode and the station-keeping ability of defect point;
B. use the described shelf depreciation that the GIS pipeline of GIS local discharge on-line monitoring device to be checked is housed of described partial-discharge measuring device monitoring based on the pulsed discharge method, and record partial discharge inception voltage, with partial discharge inception voltage's contrast that described on-Line Monitor Device records, relatively both sensitivity.
9. method according to claim 8 is characterized in that:
Also comprise the steps:
C. the described GIS pipeline that GIS local discharge on-line monitoring device to be checked is housed is applied standard lightning impulse, voltage 550kV, then positive-negative polarity each 3 times judges whether described GIS local discharge on-line monitoring device can work.
10. method according to claim 8 is characterized in that:
Also comprise the steps:
D. connecting electric capacity at the described sleeve pipe of an end of the described GIS pipeline that GIS local discharge on-line monitoring device to be checked is housed is the capacitor of 5000pF, apply voltage 63.5kV on the described sleeve pipe of the other end, operate simultaneously described disconnector folding, folding 3 times, judgement in this step and/or after step described GIS local discharge on-line monitoring device whether can work.
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