CN102520310A - System for positioning turn-to-turn insulation defect of dry air-core reactor - Google Patents
System for positioning turn-to-turn insulation defect of dry air-core reactor Download PDFInfo
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- CN102520310A CN102520310A CN2012100123619A CN201210012361A CN102520310A CN 102520310 A CN102520310 A CN 102520310A CN 2012100123619 A CN2012100123619 A CN 2012100123619A CN 201210012361 A CN201210012361 A CN 201210012361A CN 102520310 A CN102520310 A CN 102520310A
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Abstract
The invention discloses a system for positioning a turn-to-turn insulation defect of a dry air-core reactor. The system comprises a first voltage-regulating transformer, a protective resistor, a rectifying silicon stack, a charging capacitor, a choke inductor and a compensation capacitor which are sequentially connected in series to constitute a closed loop, wherein the protective resistor is connected with the first output end of the first voltage-regulating transformer, the compensation capacitor is connected with the second output end of the first voltage-regulating transformer, one end of a discharging sphere gap is connected between the rectifying silicon stack and the charging capacitor, the other end of the discharging sphere gap is connected with the second output end of the first voltage-regulating transformer, the compensation capacitor is connected with a second voltage-regulating transformer in parallel, an alerting-current power supply is connected with the second voltage-regulating transformer and the first voltage-regulating transformer, a first detection point connected with one end of the dry air-core reactor is arranged between the charging capacitor and the choke inductor, and a second detection point connected with the other end of the dry air-core inductor is arranged between the compensation capacitor and the first voltage-regulating transformer.
Description
Technical field
The present invention relates to a kind of positioning system, particularly relate to a kind of positioning system of dry-type air-core reactor turn-to-turn insulation defective.
Background technology
In the prior art, the ablaze accident of reactor that causes because of the turn-to-turn insulation defective can take place in the electrical network often.At present; China still is in experience accumulation to the means of dry-type air-core reactor turn-to-turn insulation defects detection and improves the stage; Because dry-type air-core reactor turn-to-turn insulation defective can't position and search, largely limit the development and progress of dry-type air-core reactor turn-to-turn insulation defect detecting technique.Simultaneously; Because the turn-to-turn insulation defective can't be located; The turn-to-turn insulation defective that causes dry-type air-core reactor all can't carry out concrete statistical study to the turn-to-turn insulation defective in the whole service process, thereby also limited reactor perfect at the improvement of structure aspects and design aspect.
Summary of the invention
Technical matters to be solved by this invention provides a kind of positioning system of dry-type air-core reactor turn-to-turn insulation defective, can accurately locate dry-type air-core reactor turn-to-turn insulation defective.
For solving the problems of the technologies described above; The invention provides a kind of positioning system of dry-type air-core reactor turn-to-turn insulation defective; Comprise first adjustable transformer, protective resistance, rectification silicon stack, charging capacitor, obstruction inductance and the building-out capacitor that are followed in series to form the closed-loop path; Said protective resistance is connected with first output terminal of said first adjustable transformer; Said building-out capacitor is connected with second output terminal of said first adjustable transformer; An end that is connected the ball discharge crack between said rectification silicon stack and the said charging capacitor; The other end in ball discharge crack is connected with second output terminal of said first adjustable transformer, said building-out capacitor parallel connection second adjustable transformer, and this second adjustable transformer is connected same AC power with said first adjustable transformer; Be provided with first check point that is connected with dry-type air-core reactor one end between said charging capacitor and the said obstruction inductance, be provided with second check point that is connected with the dry-type air-core reactor other end between said building-out capacitor and said first adjustable transformer.
The essence of present technique scheme is to form through power-frequency voltage circuit and high-frequency impulse oscillating voltage circuit mutual superposition, can realize metallicity puncture, low-resistance puncture, high resistant are punctured three kinds of different defects character and position.Wherein, block inductance, building-out capacitor and second adjustable transformer and constitute the power-frequency voltage circuit part, first adjustable transformer, protective resistance, rectification silicon stack, ball discharge crack and charging capacitor are formed the high-frequency electrical pulses volt circuit.The function that the circuit that the present technique scheme is showed is realized is that high-frequency impulse oscillating voltage and power-frequency voltage can be superimposed upon on the dry-type air-core reactor to be measured simultaneously, and high-frequency impulse oscillating voltage and power-frequency voltage do not influence the other side's operate as normal mutually.Simultaneously, the power-frequency voltage that applies will guarantee that the voltage on the dry-type air-core reactor to be measured is rated voltage, and electric current is a rated current.Being applied to high-frequency impulse oscillating voltage frequency on the dry-type air-core reactor to be measured and being 100kHz and following, voltage magnitude then stipulates according to related request.The effect of building-out capacitor provides the test current of dry-type air-core reactor to be measured; Reduction is to the capacity requirement of experiment power supply; The capacitance of building-out capacitor is bigger, because consider the physical constraints of testing equipment, can't require can bear on the building-out capacitor too high high-frequency impulse oscillating voltage.When AC power provides the power current of dry-type air-core reactor to be measured; Self can not bear the high-frequency impulse oscillating voltage; Therefore inductance is blocked in one of design in circuit, is used to bear HF voltage, reaches the purpose of protection building-out capacitor and AC power AC.In the present technique scheme institute designed circuit, with the design of the tie point of dry-type air-core reactor to be measured also be crucial, if the choice of location of tie point is improper, can't solve this positioning system technical matters to be solved.In addition, another one key Design of the present invention is with first adjustable transformer and the shared AC power of second adjustable transformer, in order to avoid have influence on the use of other components and parts in the circuit because there is phase differential in two power supplys.The present technique scheme mainly is to have set up the circuit of power-frequency voltage and the stack of high-frequency impulse oscillating voltage, and this circuit can be realized the defect point temperature is sharply raise, and reaches the purpose of defect location then through thermal infrared imager.
Further preferred, said first adjustable transformer and said second adjustable transformer are formed by pressure regulator and HT testing transformer.
The present invention has following useful technique effect:
(1) filled up the blank that present dry-type air-core reactor turn-to-turn insulation defective can't be located, realized defective is accurately located;
(2) realized the detection effect of present dry-type air-core reactor turn-to-turn insulation defect detecting device is verified, promoted the development and progress of dry-type air-core reactor turn-to-turn insulation defect detecting device;
(3) will make defective locations added up and become possibility, and, instruct and in service the dry-type air-core reactor insulating monitoring is maked an inspection tour for the operation maintenance rules of formulating dry-type air-core reactor provide foundation;
(4), will help instructing reactor perfect at the improvement of structure aspects, design aspect, thereby further improve the operational reliability of dry-type air-core reactor, the probability that the reduction accident takes place to the statistical study of defective locations.
Description of drawings
Fig. 1 is the circuit theory diagrams of the embodiment of the invention.
Embodiment
Below in conjunction with accompanying drawing and specific embodiment the present invention is done further explain.
Embodiment:
Referring to Fig. 1, Fig. 1 is the circuit theory diagrams of the embodiment of the invention, is the power-frequency voltage circuit part in the lower dashed line frame among the figure, is high-frequency impulse oscillating voltage circuit part in the upside frame of broken lines.A kind of positioning system of dry-type air-core reactor turn-to-turn insulation defective comprises first adjustable transformer, protective resistance R, rectification silicon stack D, charging capacitor C, the obstruction inductance L that are followed in series to form the closed-loop path
1With building-out capacitor C
1, said first adjustable transformer is by the first pressure regulator T
1With the first HT testing transformer T
2Form.Said protective resistance R and the said first HT testing transformer T
2First output terminal connect said building-out capacitor C and the said first HT testing transformer T
2Second output terminal connect.An end that is connected ball discharge crack S between said rectification silicon stack D and the said charging capacitor C, the other end of ball discharge crack S and the said first HT testing transformer T
2Second output terminal connect said building-out capacitor C
1Parallel connection second adjustable transformer, said second adjustable transformer is by the second pressure regulator T
3With the second HT testing transformer T
4Form, second adjustable transformer can be said building-out capacitor C
1Power supply.Said charging capacitor C and said obstruction inductance L
1Between be provided with first check point that is connected with dry-type air-core reactor L one end, said building-out capacitor C
1With the said first HT testing transformer T
2Between be provided with second check point that is connected with the dry-type air-core reactor L other end.First adjustable transformer and second adjustable transformer are supplied power by same AC power AC, and are respectively equipped with first K switch and second switch K
1Wherein, block inductance L
1Rated voltage be not less than the rated voltage of tested dry-type air-core reactor L, and inductance value is suitable with L; Building-out capacitor C
1Value according to blocking inductance L
1Confirm with dry-type air-core reactor L, calculate according to following formula,
The capacitance of charging capacitor C is according to computes,
F≤100kH wherein.The S discharge of under given voltage, lighting a fire in ball discharge crack is for dry-type air-core reactor L to be measured provides the high-frequency impulse oscillating voltage.
The present invention has following points for attention in design: 1) block inductance L
1Select for use, the position in circuit, and block inductance L
1The obstruction inductance L is selected in the selection of inductance value for use
1Fundamental purpose be as blocking inductance, make it when not influencing original oscillation circuit, block high-frequency oscillation voltage and be applied on the power-frequency voltage circuit, make the power-frequency voltage circuit not bear high-frequency oscillation voltage, guaranteeing the operate as normal of power-frequency voltage circuit.2) building-out capacitor C
1Select for use, the position in circuit, and building-out capacitor C
1The selection of capacitance, building-out capacitor C
1One side is electric capacity by way of compensation, and is parallelly connected with the power-frequency voltage circuit on the one hand for dry-type air-core reactor L to be measured provides rated current, for high-frequency current provides passage, makes power frequency supply not bear the high-frequency impulse oscillating voltage.3) the shared AC power in the former limit of first adjustable transformer and second adjustable transformer is in order to avoid have influence on the use of other components and parts in the circuit because there is phase differential in two power supplys.In designed circuit of the present invention, when on dry-type air-core reactor, superposeing power-frequency voltage and high-frequency pulse voltage, selecting charging capacitor C is 3000pF; Current-limiting resistance R resistance is 6k Ω; The gap in adjustment ball discharge crack makes it discharge under 7kV voltage, and will be produced high-frequency impulse oscillating voltage on the examination reactor this moment, and oscillation peak voltage is 7kV; For the work frequency circuit part, block inductance L
1Select and the suitable inductance value of dry-type air-core reactor L to be measured, be 4.24mH, C
1Electric capacity by way of compensation is according to oscillation frequency, dry-type air-core reactor L to be measured with block inductance L
1Select, in this circuit, elect 1000uF as, because oscillation frequency about tens of kHz, is blocked inductance L this moment
1On will bear main high-frequency impulse oscillating voltage, through simulation calculation building-out capacitor C
1On the high-frequency pulse voltage peak value that bears 2.15V only, receive the influence of high-frequency impulse oscillating voltage hardly, thereby guaranteed that the power-frequency voltage circuit does not bear the high-frequency impulse oscillating voltage.
The present invention is through the method for power-frequency voltage and high-frequency pulse voltage stack, has the place of defective for turn-to-turn insulation, under the effect of high-frequency pulse voltage, can make turn-to-turn formation spark discharge and temporary puncture; And the power-frequency voltage of stack can make not blow-out of breakdown between adjacent turns; Both time effects can be so that turn-to-turn insulation forms continuous short-circuit condition, and under the effect of electric arc, the short dot temperature raises rapidly; Can defect point accurately be located through thermal infrared imager; Simultaneously the turn-to-turn insulation defect point can be because of high temperature cabonization, and follows smog, the signable in view of the above position of failure point of respectively sealing.
Above-listed detailed description is to the specifying of one of the present invention possible embodiments, and this embodiment is not in order to limiting claim of the present invention, and the equivalence that all the present invention of disengaging do is implemented or change, all should be contained in the claim of this case.
Claims (2)
1. the positioning system of a dry-type air-core reactor turn-to-turn insulation defective; It is characterized in that: comprise first adjustable transformer, protective resistance, rectification silicon stack, charging capacitor, obstruction inductance and the building-out capacitor that are followed in series to form the closed-loop path; Said protective resistance is connected with first output terminal of said first adjustable transformer; Said building-out capacitor is connected with second output terminal of said first adjustable transformer; An end that is connected the ball discharge crack between said rectification silicon stack and the said charging capacitor; The other end in ball discharge crack is connected with second output terminal of said first adjustable transformer, said building-out capacitor parallel connection second adjustable transformer, and this second adjustable transformer is connected same AC power with said first adjustable transformer; Be provided with first check point that is connected with dry-type air-core reactor one end between said charging capacitor and the said obstruction inductance, be provided with second check point that is connected with the dry-type air-core reactor other end between said building-out capacitor and said first adjustable transformer.
2. the positioning system of a kind of dry-type air-core reactor turn-to-turn insulation defective according to claim 1 is characterized in that: said first adjustable transformer and said second adjustable transformer are formed by pressure regulator and HT testing transformer.
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| CN201210012361.9A CN102520310B (en) | 2012-01-10 | 2012-01-10 | System for positioning turn-to-turn insulation defect of dry air-core reactor |
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| CN201210012361.9A CN102520310B (en) | 2012-01-10 | 2012-01-10 | System for positioning turn-to-turn insulation defect of dry air-core reactor |
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| CN102520310A true CN102520310A (en) | 2012-06-27 |
| CN102520310B CN102520310B (en) | 2015-03-18 |
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102981111A (en) * | 2012-12-24 | 2013-03-20 | 宁波电业局 | Interturn insulation detector for dry air reactor |
| CN103605015A (en) * | 2013-10-24 | 2014-02-26 | 西安欣东源电气有限公司 | Device and method for high-precision electric parameter measurement dry-type reactor online monitoring |
| CN104698353A (en) * | 2015-03-11 | 2015-06-10 | 广西电网有限责任公司电力科学研究院 | Temperature monitoring based insulating defect detection system of dry type electric reactor |
| CN113759293A (en) * | 2021-09-01 | 2021-12-07 | 咸亨国际（杭州）电气制造有限公司 | Simulated power transformer for training and modeling method thereof |
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| CN103605015A (en) * | 2013-10-24 | 2014-02-26 | 西安欣东源电气有限公司 | Device and method for high-precision electric parameter measurement dry-type reactor online monitoring |
| CN104698353A (en) * | 2015-03-11 | 2015-06-10 | 广西电网有限责任公司电力科学研究院 | Temperature monitoring based insulating defect detection system of dry type electric reactor |
| CN113759293A (en) * | 2021-09-01 | 2021-12-07 | 咸亨国际（杭州）电气制造有限公司 | Simulated power transformer for training and modeling method thereof |
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| CN102520310B (en) | 2015-03-18 |
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Address after: 510080 Dongfeng East Road, Dongfeng, Guangdong, Guangzhou, Zhejiang Province, No. 8 Patentee after: ELECTRIC POWER RESEARCH INSTITUTE, GUANGDONG POWER GRID CO., LTD. Address before: 510080 Dongfeng East Road, Dongfeng, Guangdong, Guangzhou, Zhejiang Province, No. 8 Patentee before: Electrical Power Research Institute of Guangdong Power Grid Corporation |