CN111781471A - Transformer alternating current-direct current composite voltage withstand test system and method - Google Patents
Transformer alternating current-direct current composite voltage withstand test system and method Download PDFInfo
- Publication number
- CN111781471A CN111781471A CN202010632994.4A CN202010632994A CN111781471A CN 111781471 A CN111781471 A CN 111781471A CN 202010632994 A CN202010632994 A CN 202010632994A CN 111781471 A CN111781471 A CN 111781471A
- Authority
- CN
- China
- Prior art keywords
- voltage
- transformer
- test
- measurement
- alternating current
- 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
-
- 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
- G01R31/14—Circuits therefor, e.g. for generating test voltages, sensing circuits
Abstract
The invention discloses a transformer alternating current-direct current composite voltage withstand test system which comprises an alternating current voltage generating module, a direct current voltage generating module and a measuring and protecting module, wherein the alternating current voltage generating module is used for providing alternating current voltage with adjustable amplitude for a transformer test sample, the direct current voltage generating module is used for providing direct current voltage with adjustable amplitude for the transformer test sample, and the measuring and protecting module is used for measuring voltage at two ends of the transformer test sample and current flowing through the measuring transformer test sample and preventing the voltage at two ends of the transformer test sample from exceeding voltage threshold values at two ends of the transformer test sample set in a voltage withstand test. The alternating voltage generation module and the direct voltage generation module can act on a test article independently or jointly, can provide adjustable alternating voltage, direct voltage and alternating-current and direct-current composite voltage for the transformer test article, and solves the problem that the actual operation condition of the transformer test article is difficult to simulate by the existing test scheme.
Description
Technical Field
The invention relates to the technical field of electrical equipment tests, in particular to a transformer alternating current-direct current composite voltage withstand test system and method.
Background
A converter transformer is an important converter device in a dc power system, and is a transformer for transmitting electric energy from an ac system to one or more converter bridges or vice versa, and is usually located between the converter bridges and the ac system. Since the converter transformer valve side is connected to dc, the converter transformer is not only subjected to ac voltage, but also to dc voltage. In the operation process of the converter transformer, the alternating current and direct current superposed voltage needs to be borne for a long time. At present, during an insulation test of a converter transformer, an alternating current withstand voltage test and a direct current withstand voltage test are respectively carried out on the transformer in times, the scheme is difficult to simulate the actual operation condition of the converter transformer, and the alternating current and direct current composite electric field which the converter transformer needs to endure cannot be accurately checked.
Disclosure of Invention
The invention aims to provide a transformer alternating current-direct current composite voltage withstand test system and a transformer alternating current-direct current composite voltage withstand test method.
In order to achieve the purpose, the transformer alternating current-direct current composite voltage withstand test system comprises an alternating current voltage generating module, a direct current voltage generating module and a measuring and protecting module, wherein the alternating current voltage generating module is used for providing alternating current voltage with adjustable amplitude for a transformer test sample, the direct current voltage generating module is used for providing direct current voltage with adjustable amplitude for the transformer test sample, and the measuring and protecting system is used for measuring the voltage at two ends of the transformer test sample and the current flowing through the measuring transformer test sample and preventing the voltage at two ends of the transformer test sample from exceeding the voltage threshold value at two ends of the transformer test sample set in the voltage withstand test.
A pressure resistance test method using the system is characterized by comprising the following steps:
step 1: selecting whether the first alternating current power supply and/or the second alternating current power supply output voltage or not according to the voltage withstand test requirement, and setting the output voltage values of the first voltage regulator and the second voltage regulator so as to obtain corresponding test voltage;
step 2: and in the whole withstand voltage test process, the measurement voltmeter and the measurement ammeter continuously measure voltage and current, and the voltage at two ends of the transformer test sample and the current flowing through the measurement transformer test sample in the withstand voltage test are obtained through proportion conversion.
The invention has the beneficial effects that:
1. the alternating voltage generation module and the direct voltage generation module can act on a test article independently or jointly, can provide adjustable alternating voltage, direct voltage and alternating-current and direct-current composite voltage for the transformer test article, and solves the problem that the actual operation condition of the transformer test article is difficult to simulate by the existing test scheme.
2. The protection resistor can prevent the secondary side current of the test transformer in the alternating current voltage generation module and the direct current voltage generation module from being overlarge, and protect components in a test loop.
3. The measurement and protection system can measure the alternating current and direct current voltage, current and partial discharge conditions of the transformer test sample, can protect the transformer test sample, and avoids the situation that the end voltage of the transformer test sample is higher than a test set value due to misoperation or other reasons.
Drawings
FIG. 1 is a schematic circuit diagram of the present invention;
the device comprises an alternating voltage generation module 1, an alternating voltage generation module 11, a first alternating current power supply 12, a first voltage regulator 13, a first test transformer 14, a first protection resistor, a direct voltage generation module 2, a second alternating current power supply 21, a second voltage regulator 22, a second test transformer 23, a second protection resistor 24, a high-voltage silicon stack 25, a filter capacitor 26, a transformer test product 3, a measurement and protection module 4, a first measurement resistor 41, a first measurement capacitor 42, a second measurement resistor 43, a second measurement capacitor 44, a measurement meter 45, a measurement voltmeter 46 and a protection gap 47.
Detailed Description
The invention is described in further detail below with reference to the following figures and specific examples:
the invention designs a transformer alternating current-direct current composite voltage withstand test system, as shown in figure 1, which comprises an alternating voltage generating module 1, a direct current voltage generating module 2 and a measuring and protecting module 4, wherein the alternating voltage generating module 1 is used for providing alternating voltage with adjustable amplitude for a transformer test article 3, the direct current voltage generating module 2 is used for providing direct current voltage with adjustable amplitude for the transformer test article 3, and the measuring and protecting module 4 is used for measuring the voltage at two ends of the transformer test article 3 and the current flowing through the measuring transformer test article 3 and preventing the voltage at two ends of the transformer test article 3 from exceeding the voltage threshold value at two ends of the transformer test article set in the voltage withstand test.
In the above technical scheme, the transformer test product 3 may be specifically an ac transformer or a converter transformer with different voltage levels, and the test system has strong applicability and can be adapted to various transformer test products 3.
In the above technical solution, the ac voltage generating module 1 includes a first ac power supply 11, a first voltage regulator 12 and a first test transformer 13, the first ac power supply 11 is connected in parallel with a primary side of the first voltage regulator 12, a secondary side of the first voltage regulator 12 is connected in parallel with a primary side of the first test transformer 13, one end of the secondary side of the first test transformer 13 is connected to one end of the test transformer 3 through a first protection resistor 14, the other end of the secondary side of the first test transformer 13 is connected to one end of a filter capacitor 26, the first ac power supply 11 is configured to supply power to the first voltage regulator 12, the first voltage regulator 12 is configured to adjust a voltage input to the primary side of the first test transformer 13 according to a requirement of a withstand voltage test, and the first test transformer 13 is configured to generate a high-voltage ac voltage (related to a specific requirement of the test) required by the withstand voltage test at The high voltage ac voltage may be selected from tens of kV to thousands of kV).
In the above technical solution, the ac voltage generation module 1 further includes a first protection resistor 14, and the first protection resistor 14 is configured to limit a current on a secondary side of the first test transformer 13 when the transformer test sample 3 is discharged, so as to protect the first test transformer 13.
In the above technical solution, the dc voltage generating module 2 includes a second ac power supply 21, a second voltage regulator 22, a second testing transformer 23, a high voltage silicon stack 25 and a filter capacitor 26, the second ac power supply 21 is connected in parallel with a primary side of the second voltage regulator 22, a secondary side of the second voltage regulator 22 is connected in parallel with a primary side of the second testing transformer 23, one end of the secondary side of the second testing transformer 23 is connected to a positive electrode of the high voltage silicon stack 25, a negative electrode of the high voltage silicon stack 25 is connected to one end of a second protection resistor 24, a voltage level of the high voltage silicon stack 25 is generally 1kV or more in relation to a withstand voltage test requirement, the other end of the second protection resistor 24 is connected to one end of the filter capacitor 26, the other end of the secondary side of the second testing transformer 23 is connected to the other end of the filter capacitor 26, the second ac power supply 21 is configured to supply power to the second voltage regulator 22, the second voltage regulator 22 is configured to adjust a voltage input to the, the second testing transformer 23 is used for generating alternating current voltage, the high-voltage silicon stack 25 is used for converting the alternating current voltage generated by the second testing transformer 23 into direct current voltage under the combined action of the high-voltage silicon stack and the filter capacitor 26, and the filter capacitor 26 is also used for passing alternating current when the transformer test product 3 only needs the alternating current voltage.
In the above technical solution, the dc voltage generation module 2 further includes a second protection resistor 24, and the second protection resistor 24 is configured to limit a current on a secondary side of the second testing transformer 23 when the transformer test sample 3 is discharged, so as to protect the second testing transformer 23.
In the above solution, the measurement and protection system 4 includes a first measurement resistor 41, a first measurement capacitor 42, a second measurement resistor 43, a second measurement capacitor 44, a measurement voltmeter 45, a measurement ammeter 46 and a protection gap 47, the first measuring resistor 41 is connected in parallel with the first measuring capacitor 42, the second measuring resistor 43 is connected in parallel with the second measuring capacitor 44, the measuring voltmeter 45 is connected in parallel with the second measuring capacitor 44, the first measuring resistor 41, the second measuring resistor 43, the measuring ammeter 46 and the transformer test product 3 are connected in series, two ends of the protective gap 47 are respectively connected with one end of the first measuring resistor 41 and one end of the second measuring resistor 43, the other end of the first measuring resistor 41 is connected with the other end of the second measuring resistor 43, and the grounding end of the measuring ammeter 46, one end of the second measuring resistor 43 and the other end of the secondary side of the second testing transformer 23 are all grounded. The first measuring resistor 41, the first measuring capacitor 42, the second measuring resistor 43 and the second measuring capacitor 44 jointly act to provide lower voltage for the measuring voltmeter 45 to measure, the voltage value measured by the measuring voltmeter 45 is used for calculating the voltage at two ends of the transformer test sample 3 through a certain proportional relation, the measuring ammeter 46 is used for measuring the current passing through the test sample 3, and the protection gap 47 is used for breakdown when the voltage at two ends of the transformer test sample 3 exceeds the voltage threshold value at two ends of the transformer test sample set in the withstand voltage test, so that the test sample and the measuring equipment are prevented from being damaged due to overhigh voltage at two ends.
In the technical scheme, the output voltage of the voltage regulator is regulated, and the aim is to match the output voltage with the requirement of a withstand voltage test.
In the above technical solution, when the second ac power supply 21 does not output a voltage (voltage is 0), only an ac voltage is supplied; when the first ac power supply 11 does not output a voltage (voltage is 0), only a dc voltage is supplied. When the two ac power supplies 21 and the first ac power supply 11 output voltages simultaneously, the ac and dc components of the output voltages can be determined by adjusting the voltage regulation values of the first voltage regulator 12 and the second voltage regulator 22, for example, when the dc high voltage is required to be 1000kV, the ac component is 10kV, the transformation ratio of the first transformer for test is 1:1000, and the transformation ratio of the second transformer for test is 1: 10. And setting the first voltage regulator to output 1kV, and setting the second voltage regulator to output 1 kV.
A pressure resistance test method using the system is characterized by comprising the following steps:
step 1: whether the first alternating current power supply 11 and/or the second alternating current power supply 21 output voltage or not is selected according to the requirement of a withstand voltage test, and the output voltage values of the first voltage regulator 12 and the second voltage regulator 22 are set, so that corresponding test voltage is obtained, all equipment sleeve terminals are grounded for at least 2h before the test is started, and the test result is prevented from being influenced by the electrification of a test article body before the test;
step 2: the test voltage should be raised to a specified level (such as 1000kV of direct current component and 10kV of alternating current component) within a preset time (1min) and kept for a duration (for example, 2h) required by the test, and thereafter, the test voltage should be lowered to 0 within the preset time (1min), during the whole withstand voltage test, the measurement voltmeter 45 and the measurement ammeter 46 continuously perform voltage and current measurement, and obtain the voltage at both ends of the test sample 3 in the withstand voltage test transformer and the current flowing through the test sample 3 of the measurement transformer through scaling, and after the withstand voltage test is finished, the system equipment should perform sufficient discharge. And analyzing the partial discharge level, and judging that the test is failed if the partial discharge is obvious.
Details not described in this specification are within the skill of the art that are well known to those skilled in the art.
Claims (10)
1. The utility model provides a compound withstand voltage test system of transformer alternating current-direct current which characterized in that: it includes that alternating voltage takes place module (1), direct current voltage and takes place module (2) and measurement and protection module (4), alternating voltage takes place module (1) and is used for providing amplitude adjustable alternating voltage to transformer sample (3), and direct current voltage takes place module (2) and is used for providing amplitude adjustable direct current voltage to transformer sample (3), measurement and protection system (4) are used for measuring the voltage at transformer sample (3) both ends and the electric current that flows through measuring transformer sample (3) and prevent that the voltage at transformer sample (3) both ends from surpassing the transformer sample both ends voltage threshold value that sets up when withstand voltage test.
2. The transformer alternating current-direct current composite voltage withstand test system according to claim 1, characterized in that: alternating current voltage generation module (1) includes first alternating current power supply (11), first voltage regulator (12) and first for experiment transformer (13), first alternating current power supply (11) are used for supplying power to first voltage regulator (12), first voltage regulator (12) are used for adjusting the voltage of inputing to first for experiment transformer (13) primary side according to withstand voltage test's demand, first for experiment transformer (13) are used for producing the required alternating current voltage of withstand voltage test at transformer specimen (3) both ends.
3. The transformer alternating current-direct current composite voltage withstand test system according to claim 2, characterized in that: the alternating voltage generation module (1) further comprises a first protection resistor (14), and the first protection resistor (14) is used for limiting the current on the secondary side of the first test transformer (13) when the transformer test sample (3) is discharged.
4. The transformer alternating current-direct current composite voltage withstand test system according to claim 1, characterized in that: the direct current voltage generation module (2) comprises a second alternating current power supply (21), a second voltage regulator (22), a second test transformer (23), a high-voltage silicon stack (25) and a filter capacitor (26), wherein the second alternating current power supply (21) is used for supplying power to the second voltage regulator (22), the second voltage regulator (22) is used for regulating and inputting voltage on the primary side of the second test transformer (23) according to the requirement of a withstand voltage test, the second test transformer (23) is used for generating alternating current voltage, the high-voltage silicon stack (25) is used for converting the alternating current voltage generated by the second test transformer (23) into the direct current voltage under the combined action of the high-voltage silicon stack and the filter capacitor (26), and the filter capacitor (26) is also used for passing the alternating current when the transformer test article (3) only needs the alternating current voltage.
5. The transformer alternating current-direct current composite voltage withstand test system according to claim 4, characterized in that: the direct-current voltage generation module (2) further comprises a second protection resistor (24), and the second protection resistor (24) is used for limiting the current of the secondary side of the second test transformer (23) when the transformer test article (3) discharges.
6. The transformer alternating current-direct current composite voltage withstand test system according to claim 1, characterized in that: the measurement and protection system (4) comprises a first measurement resistor (41), a first measurement capacitor (42), a second measurement resistor (43), a second measurement capacitor (44), a measurement voltmeter (45), a measurement ammeter (46) and a protection gap (47), wherein the first measurement resistor (41) is connected with the first measurement capacitor (42) in parallel, the second measurement resistor (43) is connected with the second measurement capacitor (44) in parallel, the first measurement resistor (41), the first measurement capacitor (42), the second measurement resistor (43) and the second measurement capacitor (44) jointly act to provide voltage for measurement by the measurement voltmeter (45), the voltage value measured by the measurement voltmeter (45) is used for calculating the voltage at two ends of the transformer test article (3), the measurement ammeter (46) is used for measuring the current passing through the test article (3), and the protection gap (47) is used for enabling the voltage at two ends of the transformer test article (3) to exceed the voltage at two ends of the voltage of the transformer test article set by the withstand voltage test Breakdown at threshold.
7. The transformer alternating current-direct current composite voltage withstand test system according to claim 3, characterized in that: the first alternating current power supply (11) is connected with the primary side of a first voltage regulator (12) in parallel, the secondary side of the first voltage regulator (12) is connected with the primary side of a first test transformer (13) in parallel, the first voltage regulator (12) is connected with the primary side of the first test transformer (13) in parallel, one end of the secondary side of the first test transformer (13) is connected with one end of a transformer test product (3) through a first protection resistor (14), and the other end of the secondary side of the first test transformer (13) is connected with one end of a filter capacitor (26).
8. The transformer alternating current-direct current composite voltage withstand test system according to claim 4, characterized in that: the second alternating current power supply (21) is connected with the primary side of a second voltage regulator (22) in parallel, the secondary side of the second voltage regulator (22) is connected with the primary side of a second testing transformer (23) in parallel, one end of the secondary side of the second testing transformer (23) is connected with the anode of a high-voltage silicon stack (25), the cathode of the high-voltage silicon stack (25) is connected with one end of a second protection resistor (24), the other end of the second protection resistor (24) is connected with one end of a filter capacitor (26), and the other end of the secondary side of the second testing transformer (23) is connected with the other end of the filter capacitor (26).
9. The transformer alternating current-direct current composite voltage withstand test system according to claim 4, characterized in that: the first measuring resistor (41) is connected with the first measuring capacitor (42) in parallel, the second measuring resistor (43) is connected with the second measuring capacitor (44) in parallel, the measuring voltmeter (45) is connected with the second measuring capacitor (44) in parallel, the first measuring resistor (41), the second measuring resistor (43), the measuring ammeter (46) and the transformer test article (3) are connected in series, two ends of the protection gap (47) are respectively connected with one end of the first measuring resistor (41) and one end of the second measuring resistor (43), the other end of the first measuring resistor (41) is connected with the other end of the second measuring resistor (43), and the grounding end of the measuring ammeter (46), one end of the second measuring resistor (43) and the other end of the secondary side of the second testing transformer (23) are all grounded.
10. A method of pressure resistance testing using the system of claim 1, comprising the steps of:
step 1: selecting whether the first alternating current power supply (11) and/or the second alternating current power supply (21) output voltage or not according to the withstand voltage test requirement, and setting the output voltage values of the first voltage regulator (12) and the second voltage regulator (22) to obtain corresponding test voltage;
step 2: the test voltage is increased to a specified level within a preset time and kept for a period required by the test, then the test voltage is reduced to 0 within the preset time, in the whole withstand voltage test process, the measurement voltmeter (45) and the measurement ammeter (46) continuously measure the voltage and the current, and the voltage at two ends of the transformer test article (3) and the current flowing through the measurement transformer test article (3) in the withstand voltage test are obtained through proportion conversion.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010632994.4A CN111781471A (en) | 2020-07-02 | 2020-07-02 | Transformer alternating current-direct current composite voltage withstand test system and method |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010632994.4A CN111781471A (en) | 2020-07-02 | 2020-07-02 | Transformer alternating current-direct current composite voltage withstand test system and method |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN111781471A true CN111781471A (en) | 2020-10-16 |
Family
ID=72757953
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202010632994.4A Pending CN111781471A (en) | 2020-07-02 | 2020-07-02 | Transformer alternating current-direct current composite voltage withstand test system and method |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN111781471A (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113092968A (en) * | 2021-04-14 | 2021-07-09 | 哈尔滨理工大学 | Automatic testing system for AC/DC breakdown field intensity of film sample |
| CN116699346A (en) * | 2023-08-08 | 2023-09-05 | 西安高压电器研究院股份有限公司 | Power frequency withstand voltage test loop and power frequency withstand voltage test method |
Citations (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN202870244U (en) * | 2012-09-28 | 2013-04-10 | 中国西电电气股份有限公司 | Testing apparatus for asymmetric voltage applying of converter valve |
| CN104035013A (en) * | 2014-05-30 | 2014-09-10 | 中国南方电网有限责任公司超高压输电公司检修试验中心 | 500 KV electromagnetic voltage transformer alternating-current frequency-doubling withstand voltage test circuit and method |
| CN107329058A (en) * | 2017-07-14 | 2017-11-07 | 中国南方电网有限责任公司超高压输电公司检修试验中心 | A kind of converter power transformer discharge characteristic pilot system and method for diagnosing faults |
| CN107612413A (en) * | 2017-07-28 | 2018-01-19 | 许继电气股份有限公司 | One kind exchange superposition dc source generating means |
| CN207020277U (en) * | 2017-07-14 | 2018-02-16 | 中国南方电网有限责任公司超高压输电公司检修试验中心 | A kind of converter power transformer discharge characteristic pilot system |
| CN207798991U (en) * | 2018-03-08 | 2018-08-31 | 云南电网有限责任公司电力科学研究院 | A kind of voltage transformer multipoint earthing detection device |
| CN110161288A (en) * | 2019-05-17 | 2019-08-23 | 华中科技大学 | A kind of direct current support capacitor test device of output AC/DC composite voltage |
| CN111123055A (en) * | 2020-01-22 | 2020-05-08 | 国网上海市电力公司 | Power generation system for composite withstand voltage test of transformer |
-
2020
- 2020-07-02 CN CN202010632994.4A patent/CN111781471A/en active Pending
Patent Citations (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN202870244U (en) * | 2012-09-28 | 2013-04-10 | 中国西电电气股份有限公司 | Testing apparatus for asymmetric voltage applying of converter valve |
| CN104035013A (en) * | 2014-05-30 | 2014-09-10 | 中国南方电网有限责任公司超高压输电公司检修试验中心 | 500 KV electromagnetic voltage transformer alternating-current frequency-doubling withstand voltage test circuit and method |
| CN107329058A (en) * | 2017-07-14 | 2017-11-07 | 中国南方电网有限责任公司超高压输电公司检修试验中心 | A kind of converter power transformer discharge characteristic pilot system and method for diagnosing faults |
| CN207020277U (en) * | 2017-07-14 | 2018-02-16 | 中国南方电网有限责任公司超高压输电公司检修试验中心 | A kind of converter power transformer discharge characteristic pilot system |
| CN107612413A (en) * | 2017-07-28 | 2018-01-19 | 许继电气股份有限公司 | One kind exchange superposition dc source generating means |
| CN207798991U (en) * | 2018-03-08 | 2018-08-31 | 云南电网有限责任公司电力科学研究院 | A kind of voltage transformer multipoint earthing detection device |
| CN110161288A (en) * | 2019-05-17 | 2019-08-23 | 华中科技大学 | A kind of direct current support capacitor test device of output AC/DC composite voltage |
| CN111123055A (en) * | 2020-01-22 | 2020-05-08 | 国网上海市电力公司 | Power generation system for composite withstand voltage test of transformer |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113092968A (en) * | 2021-04-14 | 2021-07-09 | 哈尔滨理工大学 | Automatic testing system for AC/DC breakdown field intensity of film sample |
| CN116699346A (en) * | 2023-08-08 | 2023-09-05 | 西安高压电器研究院股份有限公司 | Power frequency withstand voltage test loop and power frequency withstand voltage test method |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN101598757B (en) | Residual voltage test circuit of controllable metal oxide arrester and method thereof | |
| CN111781471A (en) | Transformer alternating current-direct current composite voltage withstand test system and method | |
| CN104035013A (en) | 500 KV electromagnetic voltage transformer alternating-current frequency-doubling withstand voltage test circuit and method | |
| CN110161288A (en) | A kind of direct current support capacitor test device of output AC/DC composite voltage | |
| CN105548781A (en) | Bus short-circuit capacity testing method, device and system | |
| CN111044871A (en) | Integrated 10kV zinc oxide arrester test system and method | |
| Thind et al. | Effect of voltage waveforms of HVDC converter transformer on lifetime characteristics | |
| Denboer et al. | Frequency scan based screening technique for harmonic interactions of HVDC systems | |
| CN106461737B (en) | Transformer testing method, electrical testing system, short circuit and anode assembly | |
| Lei et al. | Behavior of voltage transformers under distorted conditions | |
| CN108919026A (en) | A kind of method of leakage current of an arrester live detection | |
| Kennedy et al. | Recommended dielectric tests and test procedures for converter transformers and smoothing reactors | |
| US4152640A (en) | Two phase high voltage insulation testing of multiphase windings | |
| CN211505780U (en) | Integrated 10kV zinc oxide arrester test system | |
| Ademola et al. | Comparative study of the reactive power consumption of a dominion energy Virginia autotransformer due to geomagnetically-induced current | |
| Möller et al. | Development of a test bench for the investigation of the breakdown voltage of insulation materials at medium frequency rectangular voltages | |
| CN211955677U (en) | System of differential pressure monitor | |
| CN210038044U (en) | Multi-pin type vertical grounding body key parameter testing device | |
| CN111751678A (en) | Preventive test method for transformer | |
| Crotti et al. | Characterization of Voltage Transformers for MV Applications Up to 150 kHz-A Preliminary Study | |
| CN111983397A (en) | Insulating medium breakdown experiment device and method | |
| CN207096431U (en) | One kind is applied to electric energy meter automatic assembly line pressure-resistant apparatus | |
| CN211528600U (en) | Circuit for testing oscillation wave | |
| CN218546874U (en) | Insulation resistance tester based on high voltage generator restraines induced voltage | |
| CN107390161A (en) | One kind is applied to electric energy meter automatic assembly line pressure-resistant apparatus |
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 | ||
| RJ01 | Rejection of invention patent application after publication | ||
| RJ01 | Rejection of invention patent application after publication |
Application publication date: 20201016 |