CN114019323A - Same-frequency same-phase alternating current withstand voltage test control system and method - Google Patents
Same-frequency same-phase alternating current withstand voltage test control system and method Download PDFInfo
- Publication number
- CN114019323A CN114019323A CN202111285279.9A CN202111285279A CN114019323A CN 114019323 A CN114019323 A CN 114019323A CN 202111285279 A CN202111285279 A CN 202111285279A CN 114019323 A CN114019323 A CN 114019323A
- Authority
- CN
- China
- Prior art keywords
- same
- voltage
- frequency
- power supply
- phase
- 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
- 238000012360 testing method Methods 0.000 title claims abstract description 89
- 238000000034 method Methods 0.000 title claims abstract description 14
- 238000004804 winding Methods 0.000 claims description 10
- 238000012544 monitoring process Methods 0.000 claims description 7
- 238000005259 measurement Methods 0.000 claims description 2
- 238000002955 isolation Methods 0.000 description 13
- 238000005516 engineering process Methods 0.000 description 5
- 230000006872 improvement Effects 0.000 description 5
- 238000007599 discharging Methods 0.000 description 4
- 230000003321 amplification Effects 0.000 description 3
- 238000011161 development Methods 0.000 description 3
- 238000010891 electric arc Methods 0.000 description 3
- 238000003199 nucleic acid amplification method Methods 0.000 description 3
- 230000009286 beneficial effect Effects 0.000 description 2
- 230000015556 catabolic process Effects 0.000 description 2
- 230000008569 process Effects 0.000 description 2
- 239000004677 Nylon Substances 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000009413 insulation Methods 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 229920001778 nylon Polymers 0.000 description 1
- 230000008439 repair process Effects 0.000 description 1
- 238000010998 test method Methods 0.000 description 1
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
Landscapes
- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- Testing Relating To Insulation (AREA)
Abstract
The invention discloses a same-frequency and same-phase alternating-current withstand voltage test control system and method, wherein the system comprises a same-frequency and same-phase power supply, a transformer, a voltage divider and an adjustable reactor, the output end of the adjustable reactor is connected with a first circuit, the first circuit is respectively connected with a bus I and a bus II of a GIS bus through a second circuit and a third circuit, the first circuit is provided with the transformer, the bus II is connected with the reference voltage input end of the same-frequency and same-phase power supply through a voltage transformer, the first circuit is provided with a first isolating switch at the input end of the current transformer, two ends of the first isolating switch are provided with grounding isolating switches, the third circuit is provided with a second isolating switch, and the second circuit is provided with a third isolating switch. The system can complete the withstand voltage test without power failure of the whole station, and increases the reliability of power supply of a power grid.
Description
Technical Field
The invention belongs to the technical field of alternating current voltage withstand test, and particularly relates to a same-frequency same-phase alternating current voltage withstand test control system and method.
Background
The GIS (Gas-insulated Metal-enclosed switch gear) same-frequency same-phase alternating-current voltage withstand test technology has remarkable social benefits: firstly, the complex power failure coordination work is avoided, and the power supply reliability is greatly improved, so that power supply enterprises can better serve the development of social economy. And secondly, the technical means of the alternating current withstand voltage test are enriched, the popularization and the application of GIS equipment can be promoted, and the development of a strong intelligent power grid is further promoted. And thirdly, the test power failure time is reduced, the social influence caused by power failure is reduced, the improvement of the high-quality service level of power supply enterprises is facilitated, and the social harmonious development is promoted.
Carrying out alternating current voltage withstand test on a GIS extension interval of a double-bus wiring, wherein the integral voltage withstand test needs integral coordination power failure in the conventional test at present; if the extension interval is tested under the condition that the live interval cannot be stopped, the GIS runs with the interval charged, and the extension interval is subjected to conventional alternating current withstand voltage, so that voltage superposition can be caused, and the disconnecting link can be broken down.
In summary, a new system and method for controlling the same-frequency and same-phase ac voltage withstand test based on the integrated monitoring protection unit are needed.
Disclosure of Invention
The invention aims to provide a same-frequency same-phase alternating-current voltage withstand test control system and method to solve one or more technical problems. The system can complete the withstand voltage test without power failure of the whole station, and increases the reliability of power supply of a power grid.
In order to achieve the purpose, the invention adopts the following technical scheme:
the invention relates to a same-frequency same-phase alternating current withstand voltage test control system, which comprises:
the common-frequency and same-phase power supply is provided with an output end and a reference voltage input end;
the transformer is connected with the output end of the same-frequency and same-phase power supply;
the adjustable reactor is arranged on a connecting line of the voltage divider and the transformer; the voltage divider is connected with the output end of the adjustable reactor;
the output end of the adjustable reactor is provided with a first circuit; the first circuit is respectively connected with a bus I and a bus II of the GIS bus through a second circuit and a third circuit; the II bus of the GIS bus is connected with the reference voltage input end of the same-frequency and same-phase power supply through a voltage transformer; a transformer is arranged on the first circuit; on the first circuit, a first isolating switch is arranged at the input end of the current transformer, and a first grounding isolating switch and a second grounding isolating switch are respectively arranged at two ends of the first isolating switch; a second isolating switch is arranged on the third circuit; and a third isolating switch is arranged on the second line.
The further improvement of the invention is that the connection of the II bus of the GIS bus and the reference voltage input end of the same-frequency and same-phase power supply through a voltage transformer is specifically as follows:
the reference voltage input end on the same-frequency and same-phase power supply is connected with a low-voltage winding of the voltage transformer and used for acquiring an operating voltage signal on the low-voltage winding of the voltage transformer and taking the acquired voltage as reference voltage.
The invention has the further improvement that the same-frequency and same-phase power supply is provided with a feedback voltage input end, and the voltage divider is provided with a test end; the feedback voltage input end of the same-frequency and same-phase power supply is connected with the test end of the voltage divider through a fourth line and used for receiving the test voltage signal.
The invention further improves the method and also comprises the following steps: and the third grounding isolating switch is arranged at the output end of the first circuit.
The invention further improves the method and also comprises the following steps: a multi-channel digital oscilloscope; the same-frequency and same-phase power supply comprises a control unit; the multi-channel digital oscilloscope is connected with the control unit of the same-frequency and same-phase power supply and is used for monitoring the voltage waveforms of two channels; one channel is a test voltage signal after voltage division, and the other channel is the voltage of the low-voltage side of the bus voltage transformer.
The further improvement of the invention is that the output end of the current transformer is also provided with a current-limiting protection resistor on the first circuit.
The invention is further improved in that the value of the current-limiting protection resistor is less than or equal to 20k omega.
The invention has the further improvement that a protection resistor is also arranged on a connecting line between the adjustable reactor and the transformer.
The invention discloses a same-frequency same-phase alternating current withstand voltage test control method, which is based on the system provided by the invention and comprises the following steps of:
step 1, extracting a reference signal from a low-voltage measurement winding of a voltage transformer; extracting a test voltage signal from a low voltage side of the voltage divider;
step 2, starting a same-frequency and same-phase power supply, and preliminarily boosting the output of the power supply cabinet to 20-30V;
step 3, adjusting the air gap of the adjustable reactor, and changing the inductance value of the adjustable reactor to enable the test loop to be in a resonance state, and the test voltage reaches the maximum value;
step 4, the control system of the same-frequency and same-phase power supply adjusts the phase-locked loop and is in the same-frequency and same-phase state;
and 6, continuously boosting until the pressure reaches a specified value of the test, and carrying out the test.
Compared with the prior art, the invention has the following beneficial effects:
compared with the traditional mode of first power failure and then testing, the system provided by the invention can complete the withstand voltage test without power failure of the whole station, and the reliability of power supply of a power grid is improved. Specifically, when a withstand voltage test is performed, a voltage signal on an operating bus needs to be acquired from a voltage transformer and used as a test reference voltage signal, and a test voltage signal needs to be extracted from a voltage divider. The same-frequency and same-phase power supply device enables the device to finally output a test voltage signal with the same frequency and phase as the operating voltage signal through the phase-locked loop, the linear push-pull amplification and other technologies. When the frequency and the phase of the test voltage and the operation voltage are in the same frequency and phase, the voltage amplitude born by the GIS isolation disconnecting link is the difference between the absolute values of the operation bus voltage and the test voltage and is far smaller than the rated insulation tolerance value of the isolation disconnecting link, so that the possibility of breakdown of the isolation disconnecting link is greatly reduced, and the alternating current withstand voltage test of the GIS interval for extension or major repair can be completed under the condition that the adjacent GIS interval does not stop power supply.
The method provided by the invention is based on the system provided by the invention, the withstand voltage test can be completed without power failure of the whole station, and the reliability of power supply of a power grid can be improved.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art are briefly introduced below; it is obvious that the drawings in the following description are some embodiments of the invention, and that for a person skilled in the art, other drawings can be derived from them without inventive effort.
FIG. 1 is a schematic diagram of a common-frequency and same-phase AC withstand voltage test control system according to an embodiment of the present invention;
in the context of figure 1 of the drawings,
100. a common-frequency and same-phase alternating current withstand voltage test control system;
1. a common-frequency and same-phase power supply; 2. a voltage divider; 3. an adjustable reactor; 4. a first line; 5. a second line; 6. a third line; 7. a fourth line; 8. an oscilloscope; 9. a current limiting protection resistor; 10. a transformer; 11. and (4) protecting the resistor.
Detailed Description
In order to make the purpose, technical effect and technical solution of the embodiments of the present invention clearer, the following clearly and completely describes the technical solution of the embodiments of the present invention with reference to the drawings in the embodiments of the present invention; it is to be understood that the described embodiments are only some of the embodiments of the present invention. Other embodiments, which can be derived by one of ordinary skill in the art from the disclosed embodiments without inventive faculty, are intended to be within the scope of the invention.
The same-frequency same-phase alternating current withstand voltage test control system of the embodiment of the invention comprises: the power supply comprises a same-frequency and same-phase power supply, a transformer connected with the output end of the same-frequency and same-phase power supply, a voltage divider connected with the positive and negative output ends of the transformer, and an adjustable reactor arranged on a connecting circuit of the voltage divider and the same-frequency and same-phase power supply;
the output end of the adjustable reactor is connected with a first circuit; the first circuit is respectively connected with a bus I and a bus II of the GIS bus through a second circuit and a third circuit; a current transformer is arranged on the first circuit, and the II bus is connected with a reference voltage input end of the same-frequency and same-phase power supply through a voltage transformer; a first isolating switch is arranged at the input end of the current transformer on the first line, and grounding isolating switches D1 and D2 are arranged at two ends of the first isolating switch; a second isolating switch is arranged on the third circuit; a third isolating switch is arranged on the second line; the output end of the voltage divider and the same-frequency and same-phase power supply are connected with the same-frequency and same-phase power supply through a fourth line.
In the embodiment of the invention, the first line is provided with a transformer for boosting the voltage with smaller amplitude (usually not more than 350V) of the same-frequency and same-phase power supply to the alternating voltage of 5-30 kV. After the reactor and the equivalent capacitance to ground of the test sample generate series resonance, the required test voltage is obtained on the test sample; the 1 st bus of the double buses is hereinafter referred to as an I bus; the 2 nd bus of the double buses is hereinafter referred to as the II bus.
In the embodiment of the invention, a reference voltage input end on the same-frequency and same-phase power supply is connected with a low-voltage winding of the voltage transformer and is used for acquiring an operating voltage signal on the low-voltage winding of the voltage transformer and taking the acquired voltage as a reference voltage; the feedback voltage input end of the same-frequency and same-phase power supply is connected with the test end of the voltage divider through the fourth line to receive a test voltage signal, and the voltage output end of the same-frequency and same-phase power supply is connected with the input end of the first line.
In the embodiment of the present invention, the output end of the first line is provided with a grounding isolation switch D3.
In the embodiment of the invention, the same-frequency and same-phase power supply is also connected with an oscilloscope. Specifically, the oscilloscope is connected with a control unit of a common-frequency and same-phase power supply, and can be used for monitoring voltage waveforms of 2 channels, wherein 1 channel is a test voltage signal after voltage division, and the other 1 channel is voltage on the low-voltage side of the bus voltage transformer. The oscilloscope is utilized to directly display the multi-state parameters such as frequency, phase difference, voltage fluctuation, waveform distortion rate and the like, and the main parameters in the test process are monitored more intuitively.
In the embodiment of the invention, a current-limiting protection resistor is arranged at the output end of the current transformer on the first circuit.
In the embodiment of the invention, a protection resistor is arranged on a line connecting the adjustable reactor and the transformer.
In the embodiment of the invention, the size of the current-limiting protection resistor does not exceed 20k omega.
The common-frequency in-phase alternating-current voltage withstand test control system based on the comprehensive monitoring protection unit has the beneficial effects that: the device is characterized in that a discharging trolley with rollers is arranged, the discharging trolley is arranged on a nylon pull rod in a sliding mode, the discharging trolley is driven by an electric hoist to automatically ascend and descend, discharging resistance discharges residual charges of a tested piece, the whole testing process can be realized by operating a controller remotely by an operator, and safety, reliability and easiness in control of field direct-current high-voltage tests are greatly improved.
Referring to fig. 1, a common-frequency in-phase ac voltage withstand test control system 100 based on an integrated monitoring protection unit according to an embodiment of the present invention includes a common-frequency in-phase power supply 1, a transformer 10 connected to an output terminal of the common-frequency in-phase power supply 1, a voltage divider 2 connected to positive and negative output terminals of the transformer 10, and an adjustable reactor 3 disposed on a connection line between the voltage divider 2 and the common-frequency in-phase power supply 1, an output terminal of the adjustable reactor 3 is connected to a first line 4, the first line 4 is connected to a first bus and a second bus of a GIS bus through a second line 5 and a third line 6, respectively, the first line 4 is provided with a current transformer CT, the second bus is connected to a reference voltage input terminal of the common-frequency in-phase power supply 1 through a voltage transformer PT, an input terminal of the current transformer CT on the first line 4 is provided with a first isolation switch DS1, two ends of the first isolation switch DS1 are provided with a grounding isolation switch D1, D2, a second isolating switch DS2 is arranged on the third line 6, a third isolating switch DS3 is arranged on the second line 5, and the output end of the voltage divider 2 is connected with the same-frequency same-phase power supply 1 through a fourth line 7.
A reference voltage input end on the same-frequency in-phase power supply 1 is connected with a low-voltage winding of a voltage transformer PT, and is used for acquiring an operating voltage signal on the low-voltage winding of the voltage transformer PT and taking the acquired voltage as a reference voltage; the feedback voltage input end of the same-frequency and same-phase power supply 1 is connected with the test end of the voltage divider 2 through a fourth line 7, receives a test voltage signal, and the voltage output end is connected with the input end of the first line 4. The output of the first line 4 is provided with a ground isolation switch D3.
In the embodiment of the invention, the same-frequency and same-phase power supply 1 is also connected with an oscilloscope 8, and a current-limiting protection resistor 9 is arranged at the output end of the current transformer CT on the first line 4. Optionally, the oscilloscope 8 is a multi-channel digital oscilloscope;
in the embodiment of the present invention, a protection resistor 11 is disposed on a line connecting the adjustable reactor 3 and the transformer 10.
According to the series resonance voltage withstand test method based on the inductance-adjusting mode, a voltage divider monitors test output voltage, a PT signal serves as a reference signal, a same-frequency same-phase power supply outputs initial same-frequency same-phase test voltage and monitors a same-frequency same-phase state, and an oscilloscope displays same-frequency same-phase waveforms; the amplitude and the gradient of overvoltage and overcurrent which occur when an isolation fracture breaks down on a GIS bus are correspondingly reduced along with the increase of resistors (mainly comprising arc resistors and current-limiting protection resistors) in a withstand voltage test loop, in order to ensure that GIS equipment is not damaged and test personnel and equipment are not damaged when the isolation fracture breaks down, the current-limiting protection resistor which is large enough is connected in series in the withstand voltage test loop, but the protection resistor is connected in series to the test loop to cause larger voltage drop and power consumption of the loop in normal work, so that the size of the current-limiting protection resistor 9 in the embodiment is not more than 20k omega; after the isolated fracture breaks down, the test loop loses the resonance condition, and the voltage between the fractures rapidly drops, so the electric arc between the fractures can also extinguish along with the electric arc, but in order to avoid the electric arc from reigniting, thereby generating larger overvoltage, the test power supply is immediately cut off by arranging a protection device after the fracture breaks down.
The PT acquires a voltage signal on the running bus as a test reference voltage signal, and the test device finally outputs a test voltage signal with the same frequency and phase as the running voltage signal through the technologies of phase-locked loop, linear push-pull amplification and the like. Under the condition of same frequency and same phase, the voltage amplitude borne by the isolation switch during the test is the difference between the absolute values of the operating bus voltage and the test voltage, so that the isolation switch cannot be broken down. The technology opens up an effective solution for the alternating current withstand voltage test of the double-bus wiring GIS transformer substation which has higher requirement on power supply reliability and difficult coordination of power failure, and has remarkable social and economic benefits.
When the GIS same-frequency and same-phase voltage-withstanding system carries out voltage-withstanding test on the expanded GIS interval, a phase-locked loop and a linear push-pull amplification technology are adopted, the voltage of a pressurization source samples the frequency and the phase of the electrified interval PT, the frequency and the phase of the electrified interval PT are completely consistent with those of the electrified interval PT, and locking is carried out, so that the same-frequency and same-phase alternating-current voltage-withstanding test of the expanded interval is carried out, and the knife switch breakdown caused by voltage superposition can be avoided. The whole system adopts a comprehensive monitoring and protecting system based on multi-state parameters such as frequency, phase, voltage fluctuation, waveform distortion and the like, and ensures the safety and reliability of the same-frequency and same-phase test. The signal source is generated by a special chip, and the stability of the output frequency is high and can reach 0.001 Hz.
In summary, the invention discloses a same-frequency and same-phase alternating-current withstand voltage test control system and method, the system comprises a same-frequency and same-phase power supply, a transformer, a voltage divider and an adjustable reactor, the output end of the adjustable reactor is connected with a first circuit, the first circuit is respectively connected with a bus I and a bus II of a GIS bus through a second circuit and a third circuit, the first circuit is provided with a current transformer, the bus II is connected with the reference voltage input end of the same-frequency and same-phase power supply through a voltage transformer, the first circuit is provided with a first isolating switch at the input end of the current transformer, two ends of the first isolating switch are provided with grounding isolating switches, the third circuit is provided with a second isolating switch, and the second circuit is provided with a third isolating switch. The invention can ensure that the voltage amplitude born by the isolation disconnecting link is the difference between the absolute values of the operating bus voltage and the test voltage, and can shorten the working time and improve the working efficiency without stopping the GIS electrification interval.
Although the present invention has been described in detail with reference to the above embodiments, those skilled in the art can make modifications and equivalents to the embodiments of the present invention without departing from the spirit and scope of the present invention, which is set forth in the claims of the present application.
Claims (9)
1. A same-frequency same-phase alternating current withstand voltage test control system is characterized by comprising:
the common-frequency and in-phase power supply (1) is provided with an output end and a reference voltage input end;
the transformer (10), the transformer (10) is connected with the output end of the same-frequency and same-phase power supply (1);
the voltage divider (2) and the adjustable reactor (3), wherein the adjustable reactor (3) is arranged on a connecting line of the voltage divider (2) and the transformer (10); the voltage divider (2) is connected with the output end of the adjustable reactor (3);
wherein, the output end of the adjustable reactor (3) is provided with a first circuit (4); the first line (4) is respectively connected with a bus I and a bus II of the GIS bus through a second line (5) and a third line (6); the II bus of the GIS bus is connected with the reference voltage input end of the same-frequency and same-phase power supply (1) through a voltage transformer; a current transformer is arranged on the first line (4); a first isolating switch is arranged at the input end of the current transformer on the first circuit (4), and a first grounding isolating switch and a second grounding isolating switch are respectively arranged at two ends of the first isolating switch; a second isolating switch is arranged on the third line (6); and a third isolating switch is arranged on the second line (5).
2. The same-frequency same-phase alternating-current withstand voltage test control system according to claim 1, wherein the connection of the bus II of the GIS bus and the reference voltage input end of the same-frequency same-phase power supply (1) through a voltage transformer is specifically as follows:
the reference voltage input end on the same-frequency and same-phase power supply (1) is connected with a low-voltage winding of the voltage transformer and used for obtaining an operating voltage signal on the low-voltage winding of the voltage transformer and taking the obtained voltage as reference voltage.
3. The same-frequency same-phase alternating-current withstand voltage test control system according to claim 1, wherein the same-frequency same-phase power supply (1) is provided with a feedback voltage input end, and the voltage divider (2) is provided with a test end; the feedback voltage input end of the same-frequency and same-phase power supply (1) is connected with the test end of the voltage divider (2) through a fourth line (7) and used for receiving a test voltage signal.
4. The same-frequency same-phase alternating-current withstand voltage test control system according to claim 1, further comprising:
and the third grounding isolating switch is arranged at the output end of the first circuit (4).
5. The same-frequency same-phase alternating-current withstand voltage test control system according to claim 1, further comprising: a multi-channel digital oscilloscope;
the same-frequency and same-phase power supply (1) comprises a control unit; the multi-channel digital oscilloscope is connected with the control unit of the same-frequency and same-phase power supply (1) and is used for monitoring the voltage waveforms of two channels; one channel is a test voltage signal after voltage division, and the other channel is the voltage of the low-voltage side of the bus voltage transformer.
6. The same-frequency same-phase alternating-current withstand voltage test control system according to claim 1, wherein a current-limiting protection resistor (9) is further arranged at the output end of the current transformer on the first line (4).
7. The same-frequency same-phase alternating-current withstand voltage test control system according to claim 6, wherein the value of the current-limiting protection resistor (9) is less than or equal to 20k Ω.
8. The same-frequency same-phase alternating-current withstand voltage test control system according to claim 1, characterized in that a protection resistor (11) is further arranged on a connection line between the adjustable reactor (3) and the transformer (10).
9. A same-frequency same-phase alternating current withstand voltage test control method is characterized in that the system based on claim 1 comprises the following steps:
step 1, extracting a reference signal from a low-voltage measurement winding of a voltage transformer; extracting a test voltage signal from a low voltage side of the voltage divider;
step 2, starting a same-frequency and same-phase power supply, and preliminarily boosting the output of the power supply cabinet to 20-30V;
step 3, adjusting the air gap of the adjustable reactor, and changing the inductance value of the adjustable reactor to enable the test loop to be in a resonance state, and the test voltage reaches the maximum value;
step 4, the control system of the same-frequency and same-phase power supply adjusts the phase-locked loop and is in the same-frequency and same-phase state;
step 5, performing phase checking on the tested phase and the adjacent operation equipment by using a phase checking device;
and 6, continuously boosting until the pressure reaches a specified value of the test, and carrying out the test.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202111285279.9A CN114019323A (en) | 2021-11-01 | 2021-11-01 | Same-frequency same-phase alternating current withstand voltage test control system and method |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202111285279.9A CN114019323A (en) | 2021-11-01 | 2021-11-01 | Same-frequency same-phase alternating current withstand voltage test control system and method |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN114019323A true CN114019323A (en) | 2022-02-08 |
Family
ID=80059492
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202111285279.9A Pending CN114019323A (en) | 2021-11-01 | 2021-11-01 | Same-frequency same-phase alternating current withstand voltage test control system and method |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN114019323A (en) |
Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CA2927519A1 (en) * | 2013-09-09 | 2015-03-12 | State Grid Corporation Of China | A gis electronic instrument transformer test system and method thereof |
| CN105425120A (en) * | 2015-11-12 | 2016-03-23 | 国网辽宁省电力有限公司盘锦供电公司 | GIS same frequency and phase AC voltage withstand test system |
-
2021
- 2021-11-01 CN CN202111285279.9A patent/CN114019323A/en active Pending
Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CA2927519A1 (en) * | 2013-09-09 | 2015-03-12 | State Grid Corporation Of China | A gis electronic instrument transformer test system and method thereof |
| CN105425120A (en) * | 2015-11-12 | 2016-03-23 | 国网辽宁省电力有限公司盘锦供电公司 | GIS same frequency and phase AC voltage withstand test system |
Non-Patent Citations (1)
| Title |
|---|
| 杨鼎革等: "GIS设备同频同相耐压试验技术的原理分析与研究", 《自动化应用》, 31 July 2020 (2020-07-31), pages 1 - 3 * |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN108548986A (en) | A kind of high resistance ground detecting system of small current neutral grounding system, device and method | |
| CN204116405U (en) | A kind of GIS is with frequency homophase controlling test protective device | |
| CN205544259U (en) | Single -phase arc light ground connection analogue means of distribution network | |
| CN204666789U (en) | A kind of end of vacuum circuit breaker examines worktable | |
| CN114047410A (en) | Mechanical vibration simulation system and method for GIS/GIL equipment | |
| CN114019323A (en) | Same-frequency same-phase alternating current withstand voltage test control system and method | |
| CN101452059A (en) | Impulse voltage endurance test method | |
| CN103048596B (en) | End-to-end direct-current voltage withstand testing device and method of MMC (modular multilevel converter) valve | |
| CN104714158A (en) | Alternating-current ultrahigh voltage main transformer and regulation transformer combined partial discharge testing system and method | |
| CN112290516A (en) | Overvoltage protection system, method and device based on bus and outgoing line polarity characteristics | |
| CN204832429U (en) | Dry -type air -core reactor interturn insulation detection device based on pulsed oscillation principle | |
| CN116430165A (en) | Power grid fault detection device and method | |
| CN203551727U (en) | Electric locomotive roof insulation detector | |
| CN103852698A (en) | Insulation strength testing device applicable to breaker vacuum arc-extinguishing chambers | |
| CN111596204B (en) | Alternating-current field breaker fracture alternating-current withstand voltage test system and method | |
| CN216209604U (en) | Withstand voltage test circuit of high-voltage fast switch type current limiter | |
| CN110445044B (en) | Transformation station transformation method for single-bus operation | |
| CN115236464A (en) | Auxiliary device and test system applied to GIS same-frequency same-phase alternating-current voltage withstand test | |
| CN104267276A (en) | Method for inspecting high-voltage motor longitudinal differential protection by means of low-voltage locked-rotor currents | |
| CN111239601B (en) | Method for detecting double-break bus isolating switch in 220 KV power transformation combined electrical equipment | |
| CN115453423A (en) | Alternating current withstand voltage test method for power transformer | |
| CN113406490A (en) | Live voltage withstand test device for direct current coil switch electrical appliance | |
| CN108279345B (en) | Power substation power transmission testing device | |
| CN207051354U (en) | A kind of signal source device | |
| CN111751678A (en) | Preventive test method for transformer |
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 |