CN112611933B - Device and method for evaluating long-term operation of dry-type reactor - Google Patents
Device and method for evaluating long-term operation of dry-type reactor Download PDFInfo
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- CN112611933B CN112611933B CN202011636108.1A CN202011636108A CN112611933B CN 112611933 B CN112611933 B CN 112611933B CN 202011636108 A CN202011636108 A CN 202011636108A CN 112611933 B CN112611933 B CN 112611933B
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- 230000007774 longterm Effects 0.000 title claims abstract description 18
- 238000000034 method Methods 0.000 title claims abstract description 12
- 238000012360 testing method Methods 0.000 claims abstract description 50
- 238000011156 evaluation Methods 0.000 claims abstract description 19
- 238000009413 insulation Methods 0.000 claims abstract description 13
- 239000012212 insulator Substances 0.000 claims description 15
- 229910000831 Steel Inorganic materials 0.000 claims description 11
- 239000010959 steel Substances 0.000 claims description 11
- 238000005516 engineering process Methods 0.000 claims description 7
- 238000012544 monitoring process Methods 0.000 claims description 7
- 230000008054 signal transmission Effects 0.000 claims description 6
- 238000004804 winding Methods 0.000 claims description 6
- 238000012806 monitoring device Methods 0.000 claims description 4
- 230000005540 biological transmission Effects 0.000 claims description 3
- 239000002085 irritant Substances 0.000 claims description 3
- 231100000021 irritant Toxicity 0.000 claims description 3
- 230000004936 stimulating effect Effects 0.000 claims description 3
- 238000001514 detection method Methods 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 230000001105 regulatory effect Effects 0.000 description 2
- 230000002159 abnormal effect Effects 0.000 description 1
- 230000032683 aging Effects 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000001914 filtration Methods 0.000 description 1
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- 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
- G01R31/003—Environmental or reliability tests
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- 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
- G01R31/1236—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 surge arresters
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- Testing Relating To Insulation (AREA)
Abstract
The invention relates to a method for detecting long-term operation of a dry-type reactor widely used in the power industry, in particular to a device and a method for evaluating long-term operation of the dry-type reactor, which solve the technical problem that turn-to-turn insulation of the dry-type reactor cannot be checked and whether the dry-type reactor can safely operate or not can be evaluated; the adopted technical scheme is as follows: the alternating current-direct current test power supply is connected with a reactor lead A through a test voltage line A, an alternating current-direct current transformer is arranged on the test voltage line A, the reactor lead A is arranged at one end of a reactor rain cover, a reactor lead B is arranged at one end of a wiring arm, and the reactor lead B is connected with the alternating current-direct current test power supply through the test voltage line B to form a closed loop; the electronic nose sensor on the insulation track arranged at the lower part of the reactor can be matched with the reactor to rapidly give an evaluation conclusion for long-term operation of the reactor; the method is widely applied to the technical field of dry-type reactor evaluation.
Description
Technical Field
The invention relates to a method for detecting long-term operation of a dry-type reactor widely used in the power industry, in particular to a device and a method for evaluating long-term operation of the dry-type reactor.
Background
Dry reactors are widely used in the power industry and mainly play roles in reactive compensation and filtering. The dry type reactor has a severe running environment and can run outdoors throughout the year, the insulation aging of the dry type air-core reactor is accelerated by sun and rain, the short circuit after the turn-to-turn insulation damage of the dry type air-core reactor is easily caused, the reactor is burnt out, and the power supply reliability is seriously affected.
At present, the dry type reactor is shipped from the factory to carry out a shipment test, but whether the existing dry type reactor running can run safely and reliably for a long time cannot be evaluated, and no effective detection method is available for evaluating whether the existing dry type reactor can run for a long time.
Disclosure of Invention
The invention overcomes the defects existing in the prior art, provides a long-term operation evaluation method of a dry-type reactor, and solves the technical problem that the prior art cannot check the turn-to-turn insulation of the dry-type reactor and evaluate whether the dry-type reactor can safely operate.
In order to solve the technical problems, the invention adopts the following technical scheme: a dry reactor long-term operation evaluation device comprising: the device comprises a reactor, a wiring arm, a supporting insulator, a supporting steel frame, an alternating current/direct current test power supply, an alternating current/direct current transformer, a high-frequency partial discharge monitor, an electronic nose sensor, a trolley, an insulating track, an adjustable resistor, a wireless remote control and a data display terminal;
The top of the reactor is provided with a rain cover, and the bottom of the reactor is provided with a wiring arm for connecting a plurality of envelopes; the bottom of the reactor is connected with the top end of a supporting insulator, and the lower end of the supporting insulator is connected with the top end of a supporting steel frame fixed on the ground; an insulating rail is arranged below the reactor, and is supported and fixed on the ground by a rail supporting insulator; the trolley which moves along the insulation track is arranged on the insulation track, and an electronic nose sensor is arranged on the trolley; the electronic nose sensor is used for collecting the irritant gas discharged when the reactor runs abnormally;
The alternating current-direct current test power supply is connected with a reactor lead A through a test voltage line A, an alternating current-direct current transformer is arranged on the test voltage line A, the reactor lead A is arranged at one end of a reactor rain cover, a reactor lead B is arranged at one end of a wiring arm, the reactor lead B is connected with the alternating current-direct current test power supply through a test voltage line B to form a closed loop, and an adjustable resistor is arranged on the test voltage line B;
when a rated line end voltage of 2.5 times is applied to the reactor, the high-frequency partial discharge detector is used for detecting the discharge condition of the reactor;
When the electric reactor is applied with an equivalent current which is 3 times of the power frequency rated current of the electric reactor, the wireless remote control device controls the trolley to move along the insulation track, and data generated when the electronic nose sensor collects the stimulating gas are transmitted to the data display terminal through wireless signal transmission.
The insulating track comprises an inner track and an outer track, the radius of the inner track is (0.5r+0.5R-5) cm, the radius of the outer track is (0.5r+0.5R+5) cm, R and R are the inner radius and the outer radius of the reactor respectively, the trolley runs along a circumference track, the trolley stops for 1 minute every time at 30 degrees, and one circumference stops for 12 times, so that the electronic nose sensor detects whether the reactor has pungent smell.
The bottom of the reactor is provided with a wiring arm support steel frame for supporting the wiring arm.
The adjustable resistor is connected in series with the reactor, and the size of the adjustable resistor is controlled to control the equivalent current applied by the reactor, so that the equivalent current applied in the dry reactor is 3 times of the power frequency rated current; the adjustable resistor comprises a winding and an insulating cylinder, wherein the winding is wound on the insulating cylinder, and the adjustment range is between 0.01 ohm and 10 ohm.
The wireless signal transmission is Massive Mimo wireless technology, and data transmission between the electronic nose sensor and the data terminal is realized by using 4.9GHz frequency band waves in the Sub 6GHz frequency band, and the data exchange speed is 1GB.
The wireless remote control device realizes accurate control of the trolley by using UWB positioning technology with accuracy reaching 1 cm within a range of 10 meters.
An evaluation method of a dry-type reactor long-term operation evaluation device, comprising the steps of:
The first step: applying 2.5 times of rated line end voltage to two ends of the reactor through an AC/DC test power supply device, and continuously applying for 15 minutes; monitoring the output current of a test power supply through an alternating current transformer, immediately stopping the test if the output current suddenly increases by more than 30% during the period, and judging the fault of the reactor;
And a second step of: meanwhile, in 15 minutes of continuously applying voltage, the high-frequency partial discharge signal of the reactor is monitored by observing the outer surface of the reactor through a high-frequency partial discharge monitoring device, and if the high-frequency partial discharge signal is detected, the test is stopped immediately, so that the fault of the reactor is judged;
And a third step of: applying an equivalent current which is 3 times of the power frequency rated current to the reactor through an external AC/DC test power supply device, simulating the actual turn-to-turn short circuit operation condition of the reactor, and continuously operating for 1 hour;
Fourth step: detecting whether the pungent odor is generated at the lower part of the reactor by using an electronic nose sensor; the signal detected by the electronic nose sensor is transmitted to the data display terminal through wireless; the stopping and starting of the trolley are controlled through the wireless remote control device, so that safety accidents caused by close-distance operation of people are avoided;
fifth step: comprehensively judging whether the reactor can operate for a long time.
And monitoring the partial discharge characteristic signals of the high-frequency electromagnetic wave signals with the frequency range of 30MHz-300MHz, and judging that the reactor cannot operate for a long time if the high-frequency electromagnetic wave signals are diagnosed as partial discharge signals within the 15-minute monitoring time range and the signal amplitudes are all larger than 50 mV.
Compared with the prior art, the invention has the following beneficial effects: the long-term operation evaluation device for the dry-type reactor realizes the long-term stable operation of the dry-type reactor by respectively applying the rated line-end voltage of 2.5 times and the equivalent current of which the applied current is 3 times of the power frequency rated current to the dry-type reactor, so that the safety accident caused by the short-distance operation of people can be avoided, and meanwhile, the problem of rapidly evaluating whether the dry-type reactor can be operated stably for a long time is solved. When the rated line end voltage of 2.5 times is applied, a high-frequency partial discharge monitor is adopted to detect whether a discharge signal exists in the reactor, and when the equivalent current of which the current is 3 times of the power frequency rated current is applied, the long-term operation evaluation of the reactor is realized by collecting the pungent smell around the reactor through an electronic nose sensor arranged at the lower part of the reactor. The insulating track of the inner track and the outer track adopted by the invention can enable the signal acquired by the electronic nose sensor moving on the upper surface to be more stable, and eliminate the influence of the internal current of the reactor on the electronic nose sensor.
Drawings
The invention is further described below with reference to the accompanying drawings.
Fig. 1 is a schematic structural view of the present invention.
In the figure: the rain-proof cover is 1, the reactor lead A is 2, the test voltage line A is3, the AC/DC current transformer is 4, the AC/DC test power supply is 5, the wiring arm is 6, the supporting insulator is 7, the supporting steel frame is 8, the wiring arm supporting steel frame is 9, the reactor is 10, the reactor lead B is 11, the test voltage line B is 12, the high-frequency partial discharge monitor is 13, the trolley is 14, the insulating track is 15, the track supporting insulator is 16, the adjustable resistor is 17, the wireless remote control is 18, and the data display terminal is 19.
Detailed Description
The invention is further described with reference to fig. 1.
A dry reactor long-term operation evaluation device comprising: the device comprises a reactor, a wiring arm, a supporting insulator, a supporting steel frame, an alternating current/direct current test power supply, an alternating current/direct current transformer, a high-frequency partial discharge monitor, an electronic nose sensor, a trolley, an insulating track, an adjustable resistor, a wireless remote control and a data display terminal;
The top of the reactor is provided with a rain cover, and the bottom of the reactor is provided with a wiring arm for connecting a plurality of envelopes; the bottom of the reactor is connected with the top end of a supporting insulator, and the lower end of the supporting insulator is connected with the top end of a supporting steel frame fixed on the ground; an insulating rail is arranged below the reactor, and is supported and fixed on the ground by a rail supporting insulator; the trolley which moves along the insulation track is arranged on the insulation track, and an electronic nose sensor is arranged on the trolley; the electronic nose sensor is used for collecting the irritant gas discharged when the reactor runs abnormally; the trolley rail is supported to a position 20cm from the dry reactor by rail support insulators.
The alternating current-direct current test power supply is connected with a reactor lead A through a test voltage line A, an alternating current-direct current transformer is arranged on the test voltage line A, the reactor lead A is arranged at one end of a reactor rain cover, a reactor lead B is arranged at one end of a wiring arm, the reactor lead B is connected with the alternating current-direct current test power supply through a test voltage line B to form a closed loop, and an adjustable resistor is arranged on the test voltage line B;
when a rated line end voltage of 2.5 times is applied to the reactor, the high-frequency partial discharge detector is used for detecting the discharge condition of the reactor;
When the electric reactor is applied with an equivalent current which is 3 times of the power frequency rated current of the electric reactor, the wireless remote control device controls the trolley to move along the insulation track, and data generated when the electronic nose sensor collects the stimulating gas are transmitted to the data display terminal through wireless signal transmission.
The insulating track comprises an inner track and an outer track, the radius of the inner track is (0.5r+0.5R-5) cm, the radius of the outer track is (0.5r+0.5R+5) cm, R and R are the inner radius and the outer radius of the reactor respectively, the trolley runs along a circumference track, the trolley stops for 1 minute every time at 30 degrees, and one circumference stops for 12 times, so that the electronic nose sensor detects whether the reactor has pungent smell.
The bottom of the reactor is provided with a wiring arm support steel frame for supporting the wiring arm.
The adjustable resistor is connected in series with the reactor, and the size of the adjustable resistor is controlled to control the equivalent current applied by the reactor, so that the equivalent current applied in the dry reactor is 3 times of the power frequency rated current; the adjustable resistor comprises a winding and an insulating cylinder, wherein the winding is wound on the insulating cylinder, and the adjustment range is between 0.01 ohm and 10 ohm.
The wireless signal transmission is Massive Mimo wireless technology, and data transmission between the electronic nose sensor and the data terminal is realized by using 4.9GHz frequency band waves in the Sub 6GHz frequency band, and the data exchange speed is 1GB.
The wireless remote control device realizes accurate control of the trolley by using UWB positioning technology with accuracy reaching 1 cm within a range of 10 meters.
In the evaluation by the above-mentioned evaluation device, the method adopted is to include the following steps:
The first step: applying 2.5 times of rated line end voltage to two ends of the reactor through an AC/DC test power supply device, and continuously applying for 15 minutes; monitoring the output current of a test power supply through an alternating current transformer, immediately stopping the test if the output current suddenly increases by more than 30% during the period, and judging the fault of the reactor;
And a second step of: meanwhile, in 15 minutes of continuously applying voltage, the high-frequency partial discharge signal of the reactor is monitored by observing the outer surface of the reactor through a high-frequency partial discharge monitoring device, and if the high-frequency partial discharge signal is detected, the test is stopped immediately, so that the fault of the reactor is judged;
And a third step of: applying an equivalent current which is 3 times of the power frequency rated current to the reactor through an external AC/DC test power supply device, simulating the actual turn-to-turn short circuit operation condition of the reactor, and continuously operating for 1 hour;
Fourth step: detecting whether the pungent odor is generated at the lower part of the reactor by using an electronic nose sensor; the signal detected by the electronic nose sensor is transmitted to the data display terminal through wireless; the stopping and starting of the trolley are controlled through the wireless remote control device, so that safety accidents caused by close-distance operation of people are avoided;
fifth step: comprehensively judging whether the reactor can operate for a long time.
And monitoring the partial discharge characteristic signals of the high-frequency electromagnetic wave signals with the frequency range of 30MHz-300MHz, and judging that the reactor cannot operate for a long time if the high-frequency electromagnetic wave signals are diagnosed as partial discharge signals within the 15-minute monitoring time range and the signal amplitudes are all larger than 50 mV.
The voltage is regulated to 2.5 times of rated voltage at two ends of the dry reactor by regulating the AC/DC test power supply device for 15 minutes.
And observing the current display of the AC/DC current transformer at any time, if the current display suddenly increases by 30%, immediately reducing the voltage output of the AC/DC test power supply device, and switching off the power supply.
During this time, a high-frequency partial discharge monitoring device was used to observe whether or not there was a partial discharge type electromagnetic wave signal on the outer surface thereof at a distance of 3m from the dry reactor. If the amplitude of the electromagnetic wave signal of 30MHz-300MHz exceeds 50mV, the voltage output of the AC/DC test power supply device is immediately reduced, and the power supply is disconnected.
And installing the vehicle-mounted electronic nose sensor and the trolley on the trolley track.
The current applied to the dry reactor is equivalent direct current which is 3 times of the power frequency rated current by adjusting the alternating current-direct current test power supply device and the adjustable reactor, and the operation is continued for 1 hour;
the wireless remote control device enables the vehicle-mounted electronic nose sensor and the trolley to run along a circular track, 30 degrees are driven each time, the vehicle is stopped for 1 minute, and 12 times are stopped for one circle.
The vehicle-mounted electronic nose sensor sends the detection data to the data display terminal through Massive Mimo wireless technology.
And if the data display terminal displays an pungent odor signal, immediately reducing the applied current and switching off the power supply.
After 2.5 times of rated line-end voltage and 3 times of power frequency rated current are respectively applied, comprehensively judging whether the dry-type reactor can run for a long time: if no current increases by 30% in the pressure test process, no partial discharge signal exists, and no pungent odor signal exists, the dry reactor can be judged to be capable of running for a long time. If one of the three performances is abnormal, the dry reactor is judged to be incapable of running for a long time.
The above embodiments are merely illustrative of the principles of the present invention and its effects, and are not intended to limit the invention. Modifications and improvements to the above-described embodiments may be made by those skilled in the art without departing from the spirit and scope of the present invention. Therefore, all equivalent modifications and changes which have been accomplished by those skilled in the art without departing from the spirit and technical spirit of the present invention should be covered by the appended claims.
Claims (5)
1. An evaluation method of a dry-type reactor long-term operation evaluation device, characterized by comprising the steps of:
The first step: applying 2.5 times of rated line end voltage to two ends of the reactor through an AC/DC test power supply device, and continuously applying for 15 minutes; monitoring the output current of a test power supply through an alternating current transformer, immediately stopping the test if the output current suddenly increases by more than 30% during the period, and judging the fault of the reactor;
And a second step of: meanwhile, in 15 minutes of continuously applying voltage, the high-frequency partial discharge signal of the reactor is monitored by observing the outer surface of the reactor through a high-frequency partial discharge monitoring device, and if the high-frequency partial discharge signal is detected, the test is stopped immediately, so that the fault of the reactor is judged;
And a third step of: applying an equivalent current which is 3 times of the power frequency rated current to the reactor through an external AC/DC test power supply device, simulating the actual turn-to-turn short circuit operation condition of the reactor, and continuously operating for 1 hour;
Fourth step: detecting whether the pungent odor is generated at the lower part of the reactor by using an electronic nose sensor; the signal detected by the electronic nose sensor is transmitted to the data display terminal through wireless; the stopping and starting of the trolley are controlled through the wireless remote control device, so that safety accidents caused by close-distance operation of people are avoided;
Fifth step: comprehensively judging whether the reactor can run for a long time; after 2.5 times of rated line-end voltage and 3 times of power frequency rated current are respectively applied, comprehensively judging whether the dry-type reactor can run for a long time: if no current is increased by 30% in the pressing process, no partial discharge signal exists, and meanwhile no pungent odor signal exists in the equivalent current of which the applied current is 3 times of the power frequency rated current, the dry-type reactor can be judged to be capable of running for a long time;
The evaluation device used comprises: the device comprises a reactor, a wiring arm, a supporting insulator, a supporting steel frame, an alternating current/direct current test power supply, an alternating current/direct current transformer, a high-frequency partial discharge monitor, an electronic nose sensor, a trolley, an insulating track, an adjustable resistor, a wireless remote control device and a data display terminal;
The top of the reactor is provided with a rain cover, and the bottom of the reactor is provided with a wiring arm for connecting a plurality of envelopes; the bottom of the reactor is connected with the top end of a supporting insulator, and the lower end of the supporting insulator is connected with the top end of a supporting steel frame fixed on the ground; an insulating rail is arranged below the reactor, and is supported and fixed on the ground by a rail supporting insulator; the trolley which moves along the insulation track is arranged on the insulation track, and an electronic nose sensor is arranged on the trolley; the electronic nose sensor is used for collecting the irritant gas discharged when the reactor runs abnormally;
The alternating current-direct current test power supply is connected with a reactor lead A through a test voltage line A, an alternating current-direct current transformer is arranged on the test voltage line A, the reactor lead A is arranged at one end of a reactor rain cover, a reactor lead B is arranged at one end of a wiring arm, the reactor lead B is connected with the alternating current-direct current test power supply through a test voltage line B to form a closed loop, and an adjustable resistor is arranged on the test voltage line B;
when a rated line end voltage of 2.5 times is applied to the reactor, the high-frequency partial discharge detector is used for detecting the discharge condition of the reactor;
When the electric reactor is applied with an equivalent current which is 3 times of the power frequency rated current of the electric reactor, the wireless remote control device controls the trolley to move along the insulated track, and data generated when the electronic nose sensor collects the stimulating gas are transmitted to the data display terminal through wireless signal transmission;
The insulating track comprises an inner track and an outer track, the radius of the inner track is (0.5r+0.5R-5) cm, the radius of the outer track is (0.5r+0.5R+5) cm, R and R are the inner radius and the outer radius of the reactor respectively, the trolley runs along a circumference track, the trolley stops for 1 minute every time at 30 degrees, and one circumference stops for 12 times, so that the electronic nose sensor detects whether the reactor has pungent smell.
2. The evaluation method of a dry reactor long-term operation evaluation device according to claim 1, wherein a wiring arm support steel frame for supporting a wiring arm is provided at a bottom of the reactor.
3. The method according to claim 1, wherein the adjustable resistor is connected in series with the reactor, and the magnitude of the equivalent current applied by the reactor is controlled by controlling the magnitude of the adjustable resistor, so that the equivalent current applied to the dry reactor is 3 times the power frequency rated current thereof; the adjustable resistor comprises a winding and an insulating cylinder, wherein the winding is wound on the insulating cylinder, and the adjustment range is between 0.01 ohm and 10 ohm.
4. The evaluation method of the long-term operation evaluation device of the dry-type reactor according to claim 1, wherein the wireless signal transmission is Massive Mimo wireless technology, 4.9GHz band waves in Sub 6GHz band are used for realizing data transmission between the electronic nose sensor and the data terminal, and the data exchange speed is 1GB.
5. The method for evaluating a long-term operation evaluation device for a dry reactor according to claim 1, wherein the wireless remote control device uses UWB positioning technology with accuracy reaching 1 cm within a range of 10 meters to realize accurate control of a trolley.
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| CN202011636108.1A CN112611933B (en) | 2020-12-31 | 2020-12-31 | Device and method for evaluating long-term operation of dry-type reactor |
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| CN112611933B true CN112611933B (en) | 2024-05-10 |
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