CN111474452A - Interturn overvoltage detection device for dry-type iron core reactor - Google Patents
Interturn overvoltage detection device for dry-type iron core reactor Download PDFInfo
- Publication number
- CN111474452A CN111474452A CN202010382512.4A CN202010382512A CN111474452A CN 111474452 A CN111474452 A CN 111474452A CN 202010382512 A CN202010382512 A CN 202010382512A CN 111474452 A CN111474452 A CN 111474452A
- Authority
- CN
- China
- Prior art keywords
- voltage
- dry
- iron core
- core reactor
- capacitor
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Pending
Links
Images
Classifications
-
- 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
- G01R31/12—Testing dielectric strength or breakdown voltage ; Testing or monitoring effectiveness or level of insulation, e.g. of a cable or of an apparatus, for example using partial discharge measurements; Electrostatic testing
- G01R31/1227—Testing dielectric strength or breakdown voltage ; Testing or monitoring effectiveness or level of insulation, e.g. of a cable or of an apparatus, for example using partial discharge measurements; Electrostatic testing of components, parts or materials
- G01R31/1263—Testing dielectric strength or breakdown voltage ; Testing or monitoring effectiveness or level of insulation, e.g. of a cable or of an apparatus, for example using partial discharge measurements; Electrostatic testing of components, parts or materials of solid or fluid materials, e.g. insulation films, bulk material; of semiconductors or LV electronic components or parts; of cable, line or wire insulation
Landscapes
- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- Testing Relating To Insulation (AREA)
Abstract
The invention relates to a turn-to-turn overvoltage detection device for a dry-type iron core reactor, which comprises a booster circuit, a direct current charging circuit, an oscillation discharging circuit and a circuit to be tested. Compared with the common lightning impulse test detection equipment, the invention is easier to detect the turn-to-turn fault under the condition of overvoltage of the dry iron core reactor, is more suitable for detecting the condition that the dry iron core reactor has more turns and the electrical parameter variation caused by the turn-to-turn fault is small, and has wide application prospect.
Description
Technical Field
The invention relates to a reactor turn-to-turn fault detection device, in particular to a dry type iron core reactor turn-to-turn overvoltage detection device based on a pulse oscillation method.
Background
The reactor is an important component of a power system, is frequently used for limiting short-circuit current, absorbing reactive power of a line and preventing overvoltage from damaging a power grid. The dry-type reactor is divided into a dry-type air-core reactor and a dry-type iron-core reactor, and compared with the dry-type air-core reactor, the dry-type iron-core reactor has the advantages of electric energy saving, applicable linearity, no electromagnetic pollution, long service life and the like. In use, the dry iron core reactor needs to be switched frequently, and during the switching process, high-frequency and high-amplitude exponentially damped oscillation overvoltage is generated on the reactor, and the voltage amplitude of the oscillation overvoltage exceeds a rated voltage by a plurality of times. Insulation faults caused by turn-to-turn overvoltage are the most common fault mode of the reactor, turn-to-turn insulation failure can cause short circuit loops and induction current with high amplitude, local high temperature of a reactor winding is caused to be burnt, and large-area power failure accidents are caused in serious cases. In the face of such a complicated use environment, the factory inspection of withstand voltage of the dry iron core electric reactor is far from enough, because the turn-to-turn insulation defect of some new dry iron core electric reactors is not obvious, but develops gradually after being continuously acted by various factors in the operation process. Therefore, the detection of turn-to-turn insulation defects of the dry-type iron core electric reactor needs to be perfected, and the turn-to-turn insulation defects are reduced, so that the method has important significance for reducing the faults of the reactor and improving the operation reliability of a power system.
With the increase of the operation age, inter-turn overvoltage faults of the dry iron core reactor in the power system tend to increase due to frequent switching, material defects, local overheating, local electric arcs and the like. The test items of the dry-type reactor in the existing preventive test regulations are mainly impedance measurement and infrared temperature measurement, and no inter-turn overvoltage test item is specified. Until now, researchers have little research on the insulation test technology between turns of the dry-type iron core reactor, test equipment is expensive, and the research content is limited.
The turn-to-turn insulation fault of the reactor is detected by performing a turn-to-turn overvoltage test on the dry iron core reactor. Compared with the general method for detecting the longitudinal insulation of the transformer and the reactor by adopting a lightning impulse test, the overvoltage test is easier to distinguish turn-to-turn insulation faults, and is more suitable for the dry iron core reactor with more turns and small electrical parameter variation caused by turn-to-turn short circuit.
Disclosure of Invention
The invention provides a pulse oscillation test device for testing turn-to-turn overvoltage of a dry iron core reactor, which is based on the condition that the turn-to-turn insulation of the reactor is allowed to be tested by using a high-frequency pulse oscillation voltage test in the standard GB1094.6-2011 and is used for solving the problem of poor stability of a test voltage value of a pulse oscillation test circuit in the traditional standard.
Reactance for dry iron coreThe inter-turn overvoltage detection device is characterized in that: it comprises a voltage regulator T1High voltage transformer T2Trigger transformer T3Rectifier silicon stack D and protective resistor R1High-voltage arm resistor R of resistor dividerHLow voltage arm resistor RLControllable discharging spherical gap S, charging capacitor Cc and high-voltage arm capacitor C of capacitive voltage dividerHLow voltage arm capacitor CLAnd an oscilloscope Z.
The voltage regulator T1The input end of the voltage regulator T is connected with a power grid1Output terminal of and high voltage transformer T2One end of the primary winding is connected, and the high-voltage transformer T2One end of the secondary winding is connected with the cathode of a rectifier silicon stack D, and the anode of the rectifier silicon stack D is connected with a protective resistor R1Is connected to the protection resistor R1The other end of the resistor is simultaneously connected with a high-voltage arm resistor R of the resistor dividerHOne end of the charging capacitor Cc is connected with an upper ball of a controllable discharging ball gap S, a lower ball of the controllable discharging ball gap S is of a needle skin structure, and the triggering transformer T3The two input ends of the primary winding are used for receiving pulse control signals, and the trigger transformer T3One output end of the secondary winding is led into a needle skin structure lower ball of the controllable discharge ball gap S through a lead and is connected with a needle of the needle skin structure lower ball, and the other end of the charging capacitor Cc is connected with a high-voltage arm capacitor C of the capacitive voltage dividerHOne end of the dry iron core reactor L is connected with the capacitor C of the high-voltage arm of the capacitive voltage dividerHAnd low voltage arm capacitor CLConnected with one end of an oscilloscope Z, the high-voltage transformer T2The other end of the secondary winding and the low-voltage arm R of the resistance dividerLAnother end of (1), trigger transformer T3The other end of the secondary winding, the needle skin structure lower ball skin of the controllable discharge ball gap S, and the low-voltage arm capacitor C of the capacitive voltage dividerLThe other end of the dry core reactor L under test and the other end of the oscilloscope Z are connected to the power ground at the same time.
The invention meets the requirement of the standard GB1094.6-2011 that the oscillation frequency of the pulse oscillation method inter-turn overvoltage test is less than 100kHz, the test duration is 1min, overvoltage with not less than 3000 required amplitudes is required to be contained, and the required amplitude is stable. Compared with a pulse oscillation test circuit for testing turn-to-turn overvoltage of a dry iron core reactor, which is provided by the conventional standard, the pulse oscillation test circuit is improved by adopting a controllable discharge technology. One ball of the ball gap is used as a trigger ball, a trigger pin is arranged at the axis position of the ball gap, the trigger ball and the trigger pin are insulated by air, and the trigger ball is connected with a secondary winding of a trigger transformer T3. Meanwhile, in order to reduce the isolation voltage of the trigger transformer, the positions of a charging capacitor and a ball gap of the circuit are exchanged, so that the trigger ball is directly grounded. The problem of the repetitive discharge spherical gap natural discharge voltage drop of a pulse oscillation test circuit for the turn-to-turn overvoltage test of the dry iron air-core reactor given in the traditional standard is solved.
Drawings
FIG. 1 is a schematic circuit diagram of a turn-to-turn overvoltage detection device for a dry-type iron core reactor according to the present invention;
FIG. 2 is a schematic diagram of a pulsed oscillating voltage method;
fig. 3 is a schematic structural diagram of a dry-type iron core reactor turn-to-turn overvoltage detection device based on a pulse oscillation principle.
Detailed Description
1. As shown in figure 1, a circuit connection schematic diagram of a turn-to-turn overvoltage detection device for a dry-type iron core reactor comprises a voltage regulator T1High voltage transformer T2Trigger transformer T3Rectifier silicon stack D and protective resistor R1High-voltage arm resistor R of resistor dividerHLow voltage arm resistor RLControllable discharging spherical gap S, charging capacitor Cc and high-voltage arm capacitor C of capacitive voltage dividerHLow voltage arm capacitor CLAnd an oscilloscope Z. The voltage regulator T1The input end of the voltage regulator T is connected with a power grid1Output terminal of and high voltage transformer T2One end of the primary winding is connected, and the high-voltage transformer T2One end of the secondary winding is connected with the cathode of a rectifier silicon stack D, and the anode of the rectifier silicon stack D is connected with a protective resistor R1Is connected to the protection resistor R1The other end of the resistor is simultaneously connected with a high-voltage arm of the resistor dividerResistance RHOne end of the charging capacitor Cc is connected with an upper ball of a controllable discharging ball gap S, a lower ball of the controllable discharging ball gap S is of a needle skin structure, and the triggering transformer T3The two input ends of the primary winding are used for receiving pulse control signals, and the trigger transformer T3One output end of the secondary winding is led into a needle skin structure lower ball of the controllable discharge ball gap S through a lead and is connected with a needle of the needle skin structure lower ball, and the other end of the charging capacitor Cc is connected with a high-voltage arm capacitor C of the capacitive voltage dividerHOne end of the dry iron core reactor L is connected with the capacitor C of the high-voltage arm of the capacitive voltage dividerHAnd low voltage arm capacitor CLConnected with one end of an oscilloscope Z, the high-voltage transformer T2The other end of the secondary winding and the low-voltage arm R of the resistance dividerLAnother end of (1), trigger transformer T3The other end of the secondary winding, the needle skin structure lower ball skin of the controllable discharge ball gap S, and the low-voltage arm capacitor C of the capacitive voltage dividerLThe other end of the dry core reactor L under test and the other end of the oscilloscope Z are connected to the power ground at the same time.
The rectifier silicon stack D is a high-voltage rectifier silicon stack. The protective resistor R1The high-voltage arm of the resistor divider is R selected for a resistor with the resistance of 50k omegaHHas a resistance value of 750 MOmega and a high-voltage arm RLThe selected resistance value is 750k omega, the voltage division ratio is 1000, and the high-voltage arm C of the capacitive voltage dividerHThe selected capacitance value is 150pF, and the low-voltage arm CLThe selected capacitance value is 150nF, the voltage division ratio is 1000, the charging capacitance Cc is 50nF, the diameters of an upper ball and a lower ball of the controllable discharging ball gap S are both 25cm, and the oscilloscope Z is a digital oscilloscope.
Firstly, the power frequency power grid passes through a voltage regulator T1The voltage is adjusted and then sent to a high-voltage test transformer T2Passing high voltage test transformer T2Boosting the input alternating current to alternating current high voltage, and enabling the boosted high voltage alternating current to pass through a high voltage silicon stack D and a protective resistor R1And becomes a dc high voltage. Then charging the charging capacitor Cc with the obtained direct current high voltage to reach a test voltage, and after the charging is finished, transforming the voltage by triggeringThe primary side of the device T3 obtains a trigger pulse, the controllable discharge ball gap S discharges, the charging capacitor Cc and the tested reactor L form damping oscillation, when the oscillation discharge voltage is attenuated to be small enough, the controllable discharge ball gap S arc extinguishes, the direct-current high-voltage power supply is started, the charging capacitor Cc starts to charge again, and the process is circulatedHAnd RLThe formed resistance voltage divider realizes the measurement of the direct current high voltage on the charging capacitor Cc, and an oscilloscope Z is adopted to pass through the capacitor C in the process of oscillation dischargeHAnd CLThe formed capacitive voltage divider realizes the measurement of the oscillation wave.
2. As shown in FIG. 2, the pulse oscillation voltage method adopted by the invention is an R L C discharge loop formed by a damping resistor Rw, a charging capacitor Cc, a reactor inductor L and a discharge sphere gap S, wherein during the test, the charging capacitor Cc is charged by a direct current power supply so that the charging voltage reaches a specific value, a switch is a discharge sphere gap S, when the charging capacitor Cc is charged to a certain value, the sphere gap S is discharged, the charging capacitor Cc and a coil to be tested form a damping oscillation circuit with a certain frequency, when the oscillation discharge current is reduced to zero, the arc is extinguished, the current provided by a rectified direct current power supply is very small due to the very large resistance, so that the arc is difficult to keep, after the arc is extinguished, the charging capacitor Cc starts to be charged again, when the load voltage reaches the sphere gap discharge voltage, the sphere gap S is discharged again, the charging capacitor Cc and the coil to be tested are connected in series to attenuate so as to generate damping oscillation, and the process is repeated under a certain condition until the direct.
3. As shown in figure 3, a schematic structural diagram of the device for detecting the turn-to-turn overvoltage of the dry-type iron core reactor can be extended according to a pulse oscillation voltage method principle diagram, a charging capacitor is connected with a measured electric reactor through a discharging ball gap, the required voltage amplitude is achieved through charging of a main capacitor, discharging is triggered by the discharging ball gap, and an R L C oscillation discharging loop is formed.
4. In order to solve the problem of reduction of the natural discharge voltage of the repetitive discharge ball gap, the invention adopts a controllable discharge technology to improve a test circuit. One ball of the ball gap is used as a trigger ball, and a trigger needle is arranged at the axle center position of the ball gap. The trigger ball and the trigger pin are insulated by air and connected with a secondary winding of a trigger transformer T3. The trigger circuit works in cooperation with the phase of a power supply, the trigger circuit starts to trigger when the negative voltage drops to zero, the trigger pulse is obtained on the primary side of the trigger transformer, and an electric field between the discharge spark distortion ball gaps is formed between the trigger ball and the trigger needle. At this time, the charging capacitor is in a voltage holding stage after being fully charged, the influence of reverse leakage of the silicon stack is ignored, and the voltage on the charging capacitor is kept unchanged at each triggering moment. Therefore, under the same discharge voltage, the controllable discharge is much larger than the corresponding ball gap of the natural discharge, and the condition that the ball gap does not discharge when the discharge is not triggered is provided. Meanwhile, in order to reduce the isolation voltage of the trigger transformer, the positions of a charging capacitor and a ball gap of the circuit are exchanged, so that the trigger ball is directly grounded.
5. The invention is not limited to the precise arrangements described above and shown in the drawings, and various modifications and changes may be made without departing from the scope thereof. The scope of the invention is limited only by the appended claims and other circuit topologies that are readily equivalent or replaced are within the scope of the invention.
Claims (8)
1. The utility model provides a be used for dry-type iron core reactor interturn overvoltage detection device which characterized by: it comprises a voltage regulator T1High voltage transformer T2Trigger transformer T3Rectifier silicon stack D and protective resistor R1High-voltage arm resistor R of resistor dividerHLow voltage arm resistor RLControllable discharging spherical gap S, charging capacitor Cc and high-voltage arm capacitor C of capacitive voltage dividerHLow voltage arm capacitor CLAnd an oscilloscope Z, wherein the input end of the voltage regulator T1 is connected to a power grid, the output end of the voltage regulator T1 is connected with one end of a primary winding of a high-voltage transformer T2, one end of a secondary winding of the high-voltage transformer T2 is connected with the cathode of a rectifier silicon stack D, the anode of the rectifier silicon stack D is connected with one end of a protection resistor R1, and the other end of the protection resistor R1 is simultaneously connected with a resistor RH of a high-voltage arm of a resistor voltage divider, one end of a charging capacitor Cc and one end of a controllable capacitor CcThe upper ball of the discharging ball gap S is connected, the lower ball of the controllable discharging ball gap S is of a needle skin structure, two input ends of a primary winding of the trigger transformer T3 are used for receiving pulse control signals, one output end of a secondary winding of the trigger transformer T3 is led into the lower ball of the needle skin structure of the controllable discharging ball gap S through a lead and is connected with a needle of the lower ball of the needle skin structure, the other end of the charging capacitor Cc is connected with a high-voltage arm capacitor C of a capacitive voltage dividerHOne end of the capacitor voltage divider is connected with one end of a dry iron core reactor L to be tested, and a high-voltage arm capacitor CH and a low-voltage arm capacitor C of the capacitor voltage dividerLOne end of oscilloscope Z is connected with another end of secondary winding of high-voltage transformer T2, and low-voltage arm R of resistance voltage dividerLThe other end of the secondary winding of the trigger transformer T3, the skin of the pin skin structure lower ball of the controllable discharge ball gap S, and the low-voltage arm capacitor C of the capacitive voltage dividerLThe other end of the dry core reactor L under test and the other end of the oscilloscope Z are connected to the power ground at the same time.
2. The device for detecting the interturn overvoltage of the dry-type iron core reactor as claimed in claim 1, wherein: the rectifier silicon stack D is a high-voltage rectifier silicon stack.
3. The device for detecting the interturn overvoltage of the dry-type iron core reactor as claimed in claim 1, wherein: the protective resistor R1Is a resistor having a resistance of 50k omega.
4. The device for detecting the interturn overvoltage of the dry-type iron core reactor as claimed in claim 1, wherein: the high-voltage arm R of the resistor dividerHHas a resistance value of 750 MOmega and a high-voltage arm RLHas a resistance of 750k omega and a voltage division ratio of 1000.
5. The device for detecting the interturn overvoltage of the dry-type iron core reactor as claimed in claim 1, wherein: the high-voltage arm C of the capacitive voltage dividerHHas a capacitance of 150pF, and a low-voltage arm CLHas a capacitance value of 150nF and,the partial pressure ratio was 1000.
6. The device for detecting the interturn overvoltage of the dry-type iron core reactor as claimed in claim 1, wherein: the capacitance value of the charging capacitor Cc is 50 nF.
7. The device for detecting the interturn overvoltage of the dry-type iron core reactor as claimed in claim 1, wherein: the diameters of the upper ball and the lower ball of the controllable discharge ball gap S are both 25 cm.
8. The device for detecting the interturn overvoltage of the dry-type iron core reactor as claimed in claim 1, wherein: the oscilloscope Z is a digital oscilloscope.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010382512.4A CN111474452A (en) | 2020-05-08 | 2020-05-08 | Interturn overvoltage detection device for dry-type iron core reactor |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010382512.4A CN111474452A (en) | 2020-05-08 | 2020-05-08 | Interturn overvoltage detection device for dry-type iron core reactor |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN111474452A true CN111474452A (en) | 2020-07-31 |
Family
ID=71762125
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202010382512.4A Pending CN111474452A (en) | 2020-05-08 | 2020-05-08 | Interturn overvoltage detection device for dry-type iron core reactor |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN111474452A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN117192443A (en) * | 2023-11-03 | 2023-12-08 | 常州同惠电子股份有限公司 | Test method and test system for turn-to-turn tester |
Citations (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN201681133U (en) * | 2010-05-12 | 2010-12-22 | 江少成 | Dry-type reactor interturn insulation detection device |
| CN102520311A (en) * | 2012-01-10 | 2012-06-27 | 广东电网公司电力科学研究院 | Method for locating turn-to-turn insulation defects of dry type air-core reactor |
| CN203519681U (en) * | 2013-11-01 | 2014-04-02 | 哈尔滨理工大学 | Pulse oscillation test apparatus for interturn insulation detection of dry-type air-core reactor |
| CN104515941A (en) * | 2014-12-24 | 2015-04-15 | 国家电网公司 | Electric reactor turn-insulating detection device based on pulse oscillation principle |
| CN205027870U (en) * | 2015-10-19 | 2016-02-10 | 哈尔滨理工大学 | Insulating detection device based on damped oscillation principle |
| CN105675933A (en) * | 2016-01-25 | 2016-06-15 | 国网浙江省电力公司嘉兴供电公司 | Ignition circuit of controllable discharge sphere gap in reactor inter-turn insulation detector |
| CN206002646U (en) * | 2016-09-19 | 2017-03-08 | 哈尔滨理工大学 | A kind of exchange superimposed pulse Resonant High Voltage hookup |
| CN206074753U (en) * | 2016-10-20 | 2017-04-05 | 云南电网有限责任公司电力科学研究院 | A kind of dry-type air-core reactor turn-to-turn insulation overvoltage checks circuit |
-
2020
- 2020-05-08 CN CN202010382512.4A patent/CN111474452A/en active Pending
Patent Citations (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN201681133U (en) * | 2010-05-12 | 2010-12-22 | 江少成 | Dry-type reactor interturn insulation detection device |
| CN102520311A (en) * | 2012-01-10 | 2012-06-27 | 广东电网公司电力科学研究院 | Method for locating turn-to-turn insulation defects of dry type air-core reactor |
| CN203519681U (en) * | 2013-11-01 | 2014-04-02 | 哈尔滨理工大学 | Pulse oscillation test apparatus for interturn insulation detection of dry-type air-core reactor |
| CN104515941A (en) * | 2014-12-24 | 2015-04-15 | 国家电网公司 | Electric reactor turn-insulating detection device based on pulse oscillation principle |
| CN205027870U (en) * | 2015-10-19 | 2016-02-10 | 哈尔滨理工大学 | Insulating detection device based on damped oscillation principle |
| CN105675933A (en) * | 2016-01-25 | 2016-06-15 | 国网浙江省电力公司嘉兴供电公司 | Ignition circuit of controllable discharge sphere gap in reactor inter-turn insulation detector |
| CN206002646U (en) * | 2016-09-19 | 2017-03-08 | 哈尔滨理工大学 | A kind of exchange superimposed pulse Resonant High Voltage hookup |
| CN206074753U (en) * | 2016-10-20 | 2017-04-05 | 云南电网有限责任公司电力科学研究院 | A kind of dry-type air-core reactor turn-to-turn insulation overvoltage checks circuit |
Non-Patent Citations (6)
| Title |
|---|
| HONGYAN NIE等: "Research on pulse oscillating circuit of turn-to-turn over-voltage test for reactors", 《2013 2ND INTERNATIONAL CONFERENCE ON ELECTRIC POWER EQUIPMENT - SWITCHING TECHNOLOGY (ICEPE-ST)》 * |
| YU ZHUANG等: "Study on turn-to-turn insulation fault condition monitoring method for dry-type air-core reactor", 《 2015 IEEE 11TH INTERNATIONAL CONFERENCE ON THE PROPERTIES AND APPLICATIONS OF DIELECTRIC MATERIALS (ICPADM)》 * |
| 张良等: "35kV干式空心电抗器匝间绝缘现场试验", 《电机与控制学报》 * |
| 徐林峰等: "干式空心电抗器匝间过电压试验技术研究", 《高压电器》 * |
| 徐林峰等: "空心电抗器匝间过电压试验用脉冲振荡电路", 《哈尔滨理工大学学报》 * |
| 魏新劳等: "干式空心电力电抗器现场匝间过电压试验技术研究", 《黑龙江大学工程学报》 * |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN117192443A (en) * | 2023-11-03 | 2023-12-08 | 常州同惠电子股份有限公司 | Test method and test system for turn-to-turn tester |
| CN117192443B (en) * | 2023-11-03 | 2024-02-09 | 常州同惠电子股份有限公司 | Test method and test system for turn-to-turn tester |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN201681133U (en) | Dry-type reactor interturn insulation detection device | |
| CN103969527B (en) | A kind of discharge and recharge life detecting device of high voltage ceramic capacitor | |
| CN201965195U (en) | Turn-to-turn insulation detection device for light dry reactor | |
| CN104515941A (en) | Electric reactor turn-insulating detection device based on pulse oscillation principle | |
| CN109342910B (en) | Full-electric partial discharge detection device and detection method | |
| CN105675933B (en) | The firing circuit of controlled discharge ball gap in reactor turn to turn insulation test device | |
| CN106684708A (en) | SF6 spark discharge device | |
| WO2015180002A1 (en) | Apparatus for judging failure of iron core and clamping part of ultra-high voltage electric reactor, and processing and eliminating same online | |
| CN111474452A (en) | Interturn overvoltage detection device for dry-type iron core reactor | |
| CN105738776A (en) | Detection system and method of turn-to-turn defects of series reactor | |
| CN114744738A (en) | High-voltage pulse discharge rock breaking driving source topological system | |
| CN103926435A (en) | Power source for detecting transformer operation waves and inducting withstand voltage partial discharge | |
| CN204177919U (en) | Based on the high direct voltage impact system of air reactor | |
| CN203894373U (en) | Insulation aging judgment system based on inductive coil | |
| CN112824911A (en) | Device for testing arc suppression coil | |
| Guo et al. | GaN-based±5kV/100kHz PWM Generator for Advanced Partial Discharge Characterization | |
| CN206193140U (en) | Air -core type reactor turn to turn short -circuit test circuit | |
| CN109688685A (en) | The arcing detection circuit of X-ray generator and a kind of X-ray generator | |
| CN214097754U (en) | Test device for verifying direct current PD ultra-wide band detection system | |
| CN112068038A (en) | Detection apparatus for seek best shielding number of turns of flyback transformer | |
| Zhang et al. | Study on partial discharge characteristics in transformer based on oscillating lightning impulse voltage waveforms | |
| CN112505462A (en) | All-in-one transformer comprehensive test system | |
| CN108375750B (en) | Electromagnetic voltage transformer induction voltage withstand and partial discharge test device and method | |
| Zhao et al. | A test standard for winding insulation and air gaps of dry-type hv-hf transformer | |
| Yao et al. | AC partial discharge measurements of aged cast resin transformers after multiple impulse voltage applications |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| WD01 | Invention patent application deemed withdrawn after publication |
Application publication date: 20200731 |
|
| WD01 | Invention patent application deemed withdrawn after publication |