CN111025066A - Transformer heating and cooling comprehensive experiment platform and using method thereof - Google Patents
Transformer heating and cooling comprehensive experiment platform and using method thereof Download PDFInfo
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- CN111025066A CN111025066A CN201911341815.5A CN201911341815A CN111025066A CN 111025066 A CN111025066 A CN 111025066A CN 201911341815 A CN201911341815 A CN 201911341815A CN 111025066 A CN111025066 A CN 111025066A
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- 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
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- G01M—TESTING STATIC OR DYNAMIC BALANCE OF MACHINES OR STRUCTURES; TESTING OF STRUCTURES OR APPARATUS, NOT OTHERWISE PROVIDED FOR
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Abstract
The invention relates to a comprehensive experiment platform for heating and cooling of a transformer and a using method thereof, and belongs to the technical field of experiment equipment of power transformers. The technical scheme is as follows: the output of the transformer loss generating system is connected with the cooling system, the hydraulic lifting system is arranged below the cooling system, the output of the oil injection and drainage system is connected with the transformer loss generating system, and the electrical measuring system is respectively connected with the transformer loss generating system, the cooling system and the oil injection and drainage system. The invention can realize the winding eddy current loss under the action of the direct current resistance loss and the leakage magnetic field of the transformer, can realize the cooling effect of the transformer under different cooling modes and the cooling effect of the transformer under different height differences of the heating center and the radiating center of the transformer, can realize the cooling effect of the oil inlet of the oil tank of the transformer under different heights and the cooling effect of the finned radiator under bottom blowing and side blowing modes, can be carried out in a laboratory, has low cost, and can realize the research requirements of tests, repeated experiments and repeated verifications at any time.
Description
Technical Field
The invention relates to a comprehensive experiment platform for heating and cooling of a transformer and a using method thereof, and belongs to the technical field of experiment equipment of power transformers.
Background
The temperature rise is an important index for measuring the design superiority and inferiority and the operation reliability of the transformer, the IEC 60076 standard specifies the limits of the top oil temperature, the average winding temperature rise and the winding hot-spot temperature rise during operation, and specifies a temperature rise test as a transformer type test for examination. In IEC 60076-7:2005 Power transformers-Part 7: Loadingguide for oil-immersed Power transformers, it is stated that the aging rate increases 1-fold for every 6K increase in the hotspot temperature in the range from 98 ℃ to 140 ℃. Along with the continuous increase of single unit capacity of transformer, its cooling problem that generates heat is more outstanding for one, and the diversification of transformer cooling mode for transformer temperature rise calculation complexity is continuously increasing. Therefore, the large-scale transformer temperature rise calculation and experimental research are carried out, and the method has very important significance for safe and stable operation of the transformer.
As is well known, if a large-scale product-grade transformer is directly used as an experimental object, the cost is extremely high, the experimental working condition is difficult to realize, and the research requirements of random experiment, repeated experiment and repeated verification are difficult to realize.
Disclosure of Invention
The invention aims to provide a transformer heating and cooling comprehensive experiment platform and a using method thereof, which can realize winding eddy current loss under the action of direct current resistance loss and leakage magnetic field of a transformer, can realize the cooling effect of the transformer under different cooling modes (ONAN, ONAF, ODAF and OFAF), can realize the cooling effect of the heating center and the heat dissipation center of the transformer under different height differences, can realize the cooling effect of an oil inlet of an oil tank of the transformer under different heights, can realize the cooling effect of a plate radiator under bottom blowing and side blowing modes, can be carried out in a laboratory, have low cost, can realize research requirements of random tests, repeated experiments and repeated verification, and effectively solve the problems in the background technology.
The technical scheme of the invention is as follows: the utility model provides a transformer cooling comprehensive experiment platform that generates heat, contains transformer loss and produces system, cooling system, hydraulic lifting system, notes oil drain system and electrical measurement system, the output and the cooling system of transformer loss production system are connected, and hydraulic lifting system sets up in the cooling system below, and the output and the transformer loss of notes oil drain system produce the system connection, and electrical measurement system produces system, cooling system and notes oil drain system with transformer loss respectively and is connected.
The transformer loss generating system comprises a transformer oil tank, a hollow winding, transformer oil, an oil storage cabinet, an oil guide pipeline, a support, an oil outlet at the top of the oil tank, an oil inlet at the bottom of the oil tank, a first oil inlet at the side wall of the oil tank and a second oil inlet at the side wall of the oil tank; the oil conservator is arranged at the upper part of the transformer oil tank and is communicated with the transformer oil tank, and the transformer oil is fully arranged in the transformer oil tank; the hollow winding is arranged inside the transformer oil tank; an oil outlet at the top of the oil tank is arranged at the top of the transformer oil tank, a first oil inlet at the side wall of the oil tank and a second oil inlet at the side wall of the oil tank are arranged at positions below the side wall of the transformer oil tank, and an oil inlet at the bottom of the oil tank is arranged at the bottom of the transformer oil tank; the upper end of the oil guide pipeline is connected with the hollow winding, and the lower end of the oil guide pipeline is communicated with an oil inlet at the bottom of the oil tank; the bracket is arranged at the bottom of the transformer oil tank; the hollow winding is a continuous cake winding made of flat copper wires.
The cooling system comprises a radiator oil inlet, a radiator oil outlet, an oil collecting pipe, a butterfly valve, a finned radiator and a fan; the finned radiators are four groups, and the number of the fans is two; when the bottom blowing mode of the finned radiator is adopted, two fans are hung at the bottoms of four groups of finned radiators, and one fan is arranged on each two groups of finned radiators; when the finned radiator side blowing mode is adopted, two fans are hung on one side of four groups of finned radiators and are arranged up and down; the oil inlet of the radiator is connected with a group of oil collecting pipes and the butterfly valve in sequence and is arranged at the upper end of the finned radiator, and the oil outlet of the radiator is connected with another group of oil collecting pipes and the butterfly valve in sequence and is arranged at the lower end of the finned radiator.
The hydraulic lifting system consists of a chassis, a hydraulic part, an electrical part, a lifting frame, an upper platform and a scale; the chassis, the lifting frame and the upper platform are sequentially arranged from bottom to top, the hydraulic part is arranged at the bottom of the lifting frame, the electric part is arranged on one side of the lifting frame on the chassis, the electric part is connected with the input end of the hydraulic part, the output end of the hydraulic part is connected with the lifting frame, the scale is arranged on one side of the chassis, the lifting frame and the upper platform, and the bottom of the scale is flush with the bottom of the chassis; the finned radiator of the cooling system is arranged on an upper platform of the hydraulic lifting system.
The oil injection and drainage system comprises an oil storage barrel, a filter, an oil delivery pipe, an oil injection and drainage pump, an oil tank oil injection port and an oil storage cabinet scale; the filter sets up inside the oil storage bucket, is connected with notes fuel outlet pump through defeated oil pipe, and the output of annotating the fuel outlet pump produces the headtotail through defeated oil pipe and oil tank oiling mouth and transformer loss, and the oil conservator scale sets up on the oil conservator that transformer loss produced the system.
The electrical measurement system comprises an optical fiber, a three-phase four-wire system power supply I, a three-phase four-wire system power supply II, a three-phase four-wire system power supply III, a three-phase four-wire system power supply IV, a circuit breaker I, a fuse, a voltage stabilizing power supply, an oil submersible pump, a motor forward and backward rotation controller, a power analyzer, a temperature tester, a circuit breaker II, a circuit breaker III, a circuit breaker IV, a circuit breaker V, a circuit breaker VI, a circuit breaker VII, a circuit breaker VIII and a circuit breaker IX; the optical fiber in the electrical measurement system is mainly embedded in the upper end part area of the hollow winding of the transformer loss generation system; the temperature tester is an optical fiber sensor and is respectively arranged at an oil outlet at the top of an oil tank, an oil inlet at the bottom of the oil tank, a first oil inlet at the side wall of the oil tank and a second oil inlet at the side wall of the oil tank of the transformer loss generating system, and an oil inlet and an oil outlet of a radiator of the cooling system; a circuit breaker eight in the electrical measurement system is connected with a hollow winding of the transformer loss generation system; a third circuit breaker in the electrical measurement system is connected with a fan of the cooling system; and a circuit breaker nine in the electrical measurement system is connected with an oil injection and drainage pump of the oil injection and drainage system.
A method for using a comprehensive experiment platform for heating and cooling a transformer,
① the transformer can be cooled in different ways including ONAN, ONAF, ODAF and OFAF, and comprises the following steps:
any one of a first oil inlet on the side wall of an oil tank and a second oil inlet on the side wall of the oil tank in the transformer loss generation system is connected with an oil outlet of a radiator of the cooling system through a hose, an oil outlet on the top of the oil tank of the transformer loss generation system is connected with an oil inlet of the radiator of the cooling system through a hose, a fan is closed by cutting off a third breaker in the electrical measurement system, an oil-submersible pump is closed by cutting off a fourth breaker in the electrical measurement system, and the connection mode is an ONAN cooling mode; any one of a first oil inlet on the side wall of an oil tank and a second oil inlet on the side wall of the oil tank in the transformer loss generation system is connected with an oil outlet of a radiator of the cooling system through a hose, an oil outlet on the top of the oil tank of the transformer loss generation system is connected with an oil inlet of the radiator of the cooling system through a hose, a third circuit breaker in the electrical measurement system is closed to start a fan, a fourth circuit breaker in the electrical measurement system is cut off to close the submersible pump, and the connection mode is an ONAF cooling mode; any one of a first oil inlet on the side wall of an oil tank and a second oil inlet on the side wall of the oil tank of the transformer loss generating system is connected with an oil outlet of a radiator of the cooling system through a hose, an oil outlet on the top of the oil tank of the transformer loss generating system is connected with an oil inlet of the radiator of the cooling system through a hose, a third circuit breaker in the electrical measurement system is closed, so that a fan is started, a fourth circuit breaker is closed, so that the submersible pump is started, and the connection mode is an OFAF cooling; an oil inlet at the bottom of an oil tank of the transformer loss generation system is connected with an oil outlet of a radiator of the cooling system through a hose, an oil outlet at the top of the oil tank of the transformer loss generation system is connected with an oil inlet of the radiator of the cooling system through a hose, a third circuit breaker in the electrical measurement system is closed, a fan is started, a fourth circuit breaker in the electrical measurement system is closed, and the submersible pump is started, wherein the connection mode is an ODAF cooling mode.
②, the method realizes the cooling effect of the transformer under the condition of different height differences between the heating center and the heat dissipation center, and comprises the following steps:
under different cooling modes including ONAN, ONAF, ODAF and OFAF, selecting a cooling mode at will, for example, selecting an ODAF cooling mode, determining that the input power of a winding is constant, performing a temperature rise experiment, recording the temperature value of an optical fiber at an oil outlet at the top of the oil tank as the temperature of an oil top layer after the temperature is stable, recording the temperature value of an optical fiber at an oil inlet at the bottom of the oil tank, and calculating the average temperature of oil. Then closing an electric part in the hydraulic lifting system, adjusting the lifting frame through the hydraulic part, further adjusting the upper platform, determining the height of the finned radiator through the scale, keeping the same input power, performing a temperature rise experiment again, recording the temperature value of the optical fiber at the oil outlet at the top of the oil tank as the temperature of the oil top layer, recording the temperature value of the optical fiber at the oil inlet at the bottom of the oil tank and calculating the average temperature of oil after the temperature reaches a stable temperature state. And finally, comparing the average temperature of the oil with the temperature change of the top layer of the oil of the radiator under different heights, thereby realizing the cooling effect of the transformer under different height differences of the heating center and the heat dissipation center.
③ the oil inlet of the transformer oil tank has cooling effect at different heights, comprising the following steps:
under different cooling modes including ONAN, ONAF and OFAF, one cooling mode is selected at will, for example, the ONAN cooling mode is selected, a first oil inlet on the side wall of an oil tank in a transformer loss generation system is connected with an oil outlet of a radiator of the cooling system through a hose, an oil outlet on the top of the oil tank of the transformer loss generation system is connected with an oil inlet of the radiator of the cooling system through a hose, a third circuit breaker in an electrical measurement system is cut off so as to close a fan, a fourth circuit breaker in the electrical measurement system is cut off so as to close an oil submersible pump, the input power of a winding is determined to be constant, a temperature rise experiment is carried out, after the temperature is stabilized, the optical fiber temperature value of the oil outlet on the top of the oil tank is. On the basis of the existing experiment, only changing the oil inlet two on the side wall of the oil tank in the transformer loss generation system to be connected with the oil outlet of the radiator of the cooling system through a hose, keeping other connections and settings unchanged, carrying out the temperature rise experiment again, recording the temperature value of the optical fiber at the oil outlet at the top of the oil tank as the temperature of the oil top layer after the temperature is stable, recording the temperature value of the optical fiber at the oil inlet at the bottom of the oil tank and calculating the average temperature of the. And comparing the two experimental results, thereby achieving the cooling effect of the oil inlet of the transformer oil tank at different heights.
④, the method comprises the following steps:
in different cooling modes, the method comprises the following steps: under ONAF, ODAF and OFAF, a cooling mode is selected at will, for example, the ODAF cooling mode is selected, an oil inlet at the bottom of an oil tank of a transformer loss generation system is connected with an oil outlet of a radiator of the cooling system through a hose, an oil outlet at the top of the oil tank of the transformer loss generation system is connected with an oil inlet of the radiator of the cooling system through a hose, two fans are arranged at the bottom of four groups of plate radiators in a suspension mode, namely, a bottom blowing mode is adopted, the input power of a winding is determined to be constant, a third circuit breaker in an electrical measurement system is closed, the fans are started, a fourth circuit breaker in the electrical measurement system is closed, an oil submersible pump is started, a temperature rise experiment is carried out, after the temperature is stable, the optical fiber temperature value of the oil. On the basis of a bottom blowing experiment, when the finned radiator is changed into a side blowing mode, two fans are hung on one side of four groups of finned radiators and are arranged up and down. And other connections and settings are unchanged, a temperature rise experiment is carried out again, after the temperature is stable, the temperature value of the optical fiber at the oil outlet at the top of the oil tank is recorded as the temperature of the oil top layer, and the temperature value of the optical fiber at the oil inlet at the bottom of the oil tank is recorded and the average temperature of the oil is calculated. And comparing the two experimental results, thereby achieving the cooling effect of the finned radiator in the bottom blowing and side blowing modes.
The invention has the beneficial effects that: can realize the winding eddy current loss under transformer direct current resistance loss and the effect of leakage magnetic field, can realize the cooling effect of transformer under the cooling methods (ONAN, ONAF, ODAF, OFAF), can realize the cooling effect under the different difference in height in transformer center of generating heat and heat dissipation center, can realize the oil inlet of transformer tank cooling effect under the co-altitude, can realize the cooling effect of plate radiator under bottom-blown and side-blown mode, can go on in the laboratory, low cost, can realize at any time experimental, the repeated experiment and the research requirement of verifying repeatedly.
Drawings
FIG. 1 is a diagram of a transformer loss generation system;
FIG. 2 is a side-blown elevation view of the cooling system of the present invention;
FIG. 3 is a bottom plan view of the cooling system of the present invention;
FIG. 4 is a diagram of the hydraulic lift system of the present invention;
FIG. 5 is a diagram of the present invention oil injection and drainage system;
FIG. 6 is a diagram of an electrical measurement system of the present invention;
in the figure: the transformer oil tank comprises a transformer oil tank 101, a hollow winding 102, transformer oil 103, an oil storage cabinet 104, an oil guide pipeline 105, a support 106, an oil outlet 107 at the top of the oil tank, an oil inlet 108 at the bottom of the oil tank, an oil inlet 109 at the side wall of the oil tank and a second oil inlet 110 at the side wall of the oil tank; a radiator oil inlet 201, a radiator oil outlet 202, an oil collecting pipe 203, a butterfly valve 204, a finned radiator 205 and a fan 206; a chassis 301, a hydraulic component 302, an electrical component 303, a lifting frame 304, an upper platform 305 and a scale 306; the device comprises an oil storage barrel 401, a filter 402, an oil pipeline 403, an oil filling and discharging pump 404, a tank oil filling opening 405 and an oil conservator scale 406; the device comprises a first three-phase four-wire system power supply 501, a second three-phase four-wire system power supply 502, a third three-phase four-wire system power supply 503, a fourth three-phase four-wire system power supply 504, a first breaker 505, a fuse 506, a stabilized voltage power supply 507, an oil-submerged pump 508, a motor forward and reverse rotation controller 509, a power analyzer 510, a temperature tester 511, a second breaker 512, a third breaker 513, a fourth breaker 514, a fifth breaker 515, a sixth breaker 516, a seventh breaker 517, an eighth breaker 518 and a ninth breaker 519.
Detailed Description
The technical solution of the present invention is further described in detail with reference to the accompanying drawings and examples.
The utility model provides a transformer cooling comprehensive experiment platform that generates heat, contains transformer loss and produces system, cooling system, hydraulic lifting system, notes oil drain system and electrical measurement system, the output and the cooling system of transformer loss production system are connected, and hydraulic lifting system sets up in the cooling system below, and the output and the transformer loss of notes oil drain system produce the system connection, and electrical measurement system produces system, cooling system and notes oil drain system with transformer loss respectively and is connected.
The transformer loss generating system comprises a transformer oil tank 101, a hollow winding 102, transformer oil 103, an oil storage cabinet 104, an oil guide pipeline 105, a support 106, an oil outlet 107 at the top of the oil tank, an oil inlet 108 at the bottom of the oil tank, a first oil inlet 109 at the side wall of the oil tank and a second oil inlet 110 at the side wall of the oil tank; the oil conservator 104 is arranged at the upper part of the transformer oil tank 101 and is communicated with the transformer oil tank 101, and the transformer oil 103 is fully arranged in the transformer oil tank 101; the hollow winding 102 is arranged inside the transformer oil tank 101; an oil outlet 107 at the top of the transformer oil tank 101 is arranged at the top of the transformer oil tank, an oil inlet 109 at the side wall of the oil tank and an oil inlet 110 at the side wall of the oil tank are arranged at the lower position of the side wall of the transformer oil tank 101, and an oil inlet 108 at the bottom of the oil tank is arranged at the bottom of the transformer oil tank 101; the upper end of the oil guide pipeline 105 is connected with the hollow winding 102, and the lower end of the oil guide pipeline is communicated with an oil inlet 108 at the bottom of the oil tank; the bracket 106 is arranged at the bottom of the transformer oil tank 101; the air-core winding 102 is a continuous pancake winding made from flat copper wire. The hollow winding 102 is a continuous pancake winding made of flat copper wire, and is used for simulating the direct current resistance loss of the winding and the eddy current loss under the action of a leakage magnetic field when alternating current is introduced.
The cooling system comprises a radiator oil inlet 201, a radiator oil outlet 202, an oil collecting pipe 203, a butterfly valve 204, a finned radiator 205 and a fan 206; the finned radiators 205 are four groups, and the fans 206 are two; when the bottom blowing mode of the finned radiator is adopted, two fans 206 are hung at the bottoms of four groups of finned radiators 205, and one fan is arranged in each group of finned radiators 205; when the finned radiator side blowing mode is adopted, two fans 206 are suspended on one side of four groups of finned radiators 205 and are arranged up and down; the number of the oil collecting pipes 203 and the number of the butterfly valves 204 are two respectively, the radiator oil inlet 201 is sequentially connected with one group of the oil collecting pipes 203 and the butterfly valves 204 and is arranged at the upper end of the finned radiator 205, and the radiator oil outlet 202 is sequentially connected with the other group of the oil collecting pipes 203 and the butterfly valves 204 and is arranged at the lower end of the finned radiator 205.
The hydraulic lifting system consists of a chassis 301, a hydraulic component 302, an electrical component 303, a lifting frame 304, an upper platform 305 and a scale 306; the chassis 301, the lifting frame 304 and the upper platform 305 are sequentially arranged from bottom to top, the hydraulic component 302 is arranged at the bottom of the lifting frame 304, the electrical component 303 is arranged on one side of the lifting frame 304 of the chassis 301, the electrical component 303 is connected with the input end of the hydraulic component 302, the output end of the hydraulic component 302 is connected with the lifting frame 304, the scale 306 is arranged on one side of the chassis 301, the lifting frame 304 and the upper platform 305, and the bottom of the scale is flush with the bottom of the chassis 301; the finned radiator 205 of the cooling system is disposed on the upper platform 305 of the hydraulic lift system.
The oil filling and discharging system comprises an oil storage barrel 401, a filter 402, an oil conveying pipe 403, an oil filling and discharging pump 404, a tank oil filling opening 405 and an oil conservator scale 406; the filter 402 is arranged inside the oil storage barrel 401 and is connected with the oil injection and drainage pump 404 through an oil pipeline 403, the output end of the oil injection and drainage pump 404 is connected with the transformer loss generation system through the oil pipeline 403 and an oil tank oil injection port 405, and the oil conservator scale 406 is arranged on the oil conservator 104 of the transformer loss generation system.
The electrical measurement system comprises an optical fiber, a three-phase four-wire system power supply I501, a three-phase four-wire system power supply II 502, a three-phase four-wire system power supply III 503, a three-phase four-wire system power supply IV 504, a circuit breaker I505, a fuse 506, a stabilized voltage power supply 507, an oil-submerged pump 508, a motor forward and reverse rotation controller 509, a power analyzer 510, a temperature tester 511, a circuit breaker II 512, a circuit breaker III 513, a circuit breaker IV 514, a circuit breaker V515, a circuit breaker six 516, a circuit breaker seven 517, a circuit breaker eight 518 and a circuit breaker nine 519; the optical fiber in the electrical measurement system is mainly embedded in the upper end part area of the hollow winding 102 of the transformer loss generation system; the temperature tester 511 is an optical fiber sensor and is respectively arranged at the oil tank top oil outlet 107, the oil tank bottom oil inlet 108, the oil tank side wall oil inlet 109 and the oil tank side wall oil inlet 110 of the transformer loss generating system, and the radiator oil inlet 201 and the radiator oil outlet 202 of the cooling system; a circuit breaker eight 518 in the electrical measurement system is connected with the hollow winding 102 of the transformer loss generation system; a third circuit breaker 513 in the electrical measurement system is connected with the fan 206 of the cooling system; the nine circuit breakers 519 in the electrical measurement system are connected to the charge and discharge pump 404 of the charge and discharge system. The thermocouple is used for temperature measurement, so that the temperature measurement device is easily subjected to electromagnetic interference, the measurement effect is not ideal, and the service life is limited. The winding of the invention is an air-core coil, and the winding is under the action of the leakage magnetic field of the coil, in order to achieve better test effect, the platform adopts the optical fiber sensing technology, can better solve the problem of temperature measurement of the transformer winding, has good insulating property, is not interfered by electromagnetism, is suitable for working in high-temperature oil gas environment, and has small sensor size, thereby being convenient for embedding and leading out on a wire cake in the transformer. The end of the winding is greatly affected by the transverse leakage flux, and meanwhile, considering that the oil temperature of the lower end part of the winding is lower, the optical fiber is mainly embedded in the upper end part area of the hollow winding 102 and used for measuring the hot spot temperature rise of the hollow winding 102. The optical fiber sensors are respectively arranged at an oil inlet 108 at the bottom of the oil tank, an oil inlet 109 at the side wall of the oil tank, an oil inlet 110 at the side wall of the oil tank, an oil outlet 107 at the top of the oil tank, and an oil inlet 201 and an oil outlet 202 of the radiator.
A method for using a comprehensive experiment platform for heating and cooling a transformer,
①, the method comprises the following steps:
any one of an oil inlet I109 and an oil inlet II 110 in the side wall of an oil tank in the transformer loss generating system is connected with an oil outlet 202 of a radiator of the cooling system through a hose, an oil outlet 107 at the top of the oil tank of the transformer loss generating system is connected with an oil inlet 201 of the radiator of the cooling system through a hose, a fan 206 is closed by cutting off a circuit breaker III 513 in the electrical measurement system, and an oil-submersible pump 508 is closed by cutting off a circuit breaker IV 514 in the electrical measurement system, wherein the connection mode is an ONAN cooling mode; any one of an oil inlet I109 and an oil inlet II 110 in the side wall of the oil tank in the transformer loss generating system is connected with an oil outlet 202 of a radiator of the cooling system through a hose, an oil outlet 107 at the top of the oil tank of the transformer loss generating system is connected with an oil inlet 201 of the radiator of the cooling system through a hose, a breaker III 513 in the electrical measurement system is closed to start a fan 206, a breaker IV 514 in the electrical measurement system is cut off to close the submersible pump 508, and the connection mode is an ONAF cooling mode; any one of a first oil inlet 109 and a second oil inlet 110 of the oil tank side wall of the transformer loss generating system is connected with a radiator oil outlet 202 of the cooling system through a hose, a top oil outlet 107 of the oil tank of the transformer loss generating system is connected with a radiator oil inlet 201 of the cooling system through a hose, a third circuit breaker 513 in the electrical measurement system is closed to start a fan 206, and a fourth circuit breaker 514 is closed to start an oil-submerged pump 508, wherein the connection mode is an OFAF cooling mode; the oil inlet 108 at the bottom of the oil tank of the transformer loss generating system is connected with the oil outlet 202 of the radiator of the cooling system through a hose, the oil outlet 107 at the top of the oil tank of the transformer loss generating system is connected with the oil inlet 201 of the radiator of the cooling system through a hose, the third circuit breaker 513 in the electrical measuring system is closed to start the fan 206, and the fourth circuit breaker 514 in the electrical measuring system is closed to start the submersible pump 508, and the connection mode is an ODAF cooling mode.
②, the method realizes the cooling effect of the transformer under the condition of different height differences between the heating center and the heat dissipation center, and comprises the following steps:
under different cooling modes (ONAN, ONAF, ODAF and OFAF), one cooling mode is selected at will (for example, the ODAF cooling mode is selected), the input power of a winding is determined to be constant, a temperature rise experiment is carried out, after the temperature is stable, the temperature value of an optical fiber at an oil outlet 107 at the top of the oil tank is recorded as the temperature of the top layer of the oil, the temperature value of an optical fiber at an oil inlet 108 at the bottom of the oil tank is recorded, and the average temperature of the oil is calculated. Then closing an electric component 303 in the hydraulic lifting system, adjusting a lifting frame 304 through a hydraulic component 302, further adjusting an upper platform 305, determining the height of the finned radiator through a ruler 306, keeping the same input power, performing a temperature rise experiment again, recording the temperature value of the optical fiber of an oil outlet 107 at the top of the oil tank as the temperature of the top layer of the oil after the temperature reaches a stable state, recording the temperature value of the optical fiber of an oil inlet 108 at the bottom of the oil tank, and calculating the average temperature of the oil. And finally, comparing the average temperature of the oil with the temperature change of the top layer of the oil of the radiator under different heights, thereby realizing the cooling effect of the transformer under different height differences of the heating center and the heat dissipation center.
③ the oil inlet of the transformer oil tank has cooling effect at different heights, comprising the following steps:
under different cooling modes (ONAN, ONAF and OFAF), a cooling mode is selected at will (for example, the ONAN cooling mode is selected), a first oil inlet 109 on the side wall of an oil tank in a transformer loss generation system is connected with an oil outlet 202 of a radiator of the cooling system through a hose, an oil outlet 107 on the top of the oil tank of the transformer loss generation system is connected with an oil inlet 201 of the radiator of the cooling system through a hose, a third circuit breaker 513 in an electrical measurement system is cut off so as to close a fan 206, a fourth circuit breaker 514 in the electrical measurement system is cut off so as to close an oil submersible pump 508, the input power of a winding is determined to be constant, a temperature rise experiment is carried out, after the temperature is stable, the optical fiber temperature value of the oil outlet 107 on the top of the oil tank is recorded. On the basis of the existing experiment, the second oil inlet 110 on the side wall of the oil tank in the transformer loss generation system is only changed to be connected with the radiator oil outlet 202 of the cooling system through a hose, other connections and settings are unchanged, the temperature rise experiment is carried out again, after the temperature is stable, the temperature value of the optical fiber of the oil outlet 107 at the top of the oil tank is recorded as the temperature of the top layer of the oil, the temperature value of the optical fiber of the oil inlet 108 at the bottom of the oil tank is recorded, and. And comparing the two experimental results, thereby achieving the cooling effect of the oil inlet of the transformer oil tank at different heights.
④, the method comprises the following steps:
under different cooling modes (ONAF, ODAF and OFAF), one cooling mode is selected at will (for example, the ODAF cooling mode is selected), an oil inlet 108 at the bottom of an oil tank of the transformer loss generating system is connected with an oil outlet 202 of a radiator of the cooling system through a hose, an oil outlet 107 at the top of the oil tank of the transformer loss generating system is connected with an oil inlet 201 of a radiator of the cooling system through a hose, two fans 206 are arranged at the bottom of the four groups of fin radiators 205 in a hanging manner, namely, a bottom blowing mode is adopted, the input power of the winding is determined to be constant, the third circuit breaker 513 in the electrical measurement system is closed so as to start the fan 206, the fourth circuit breaker 514 in the electrical measurement system is closed so as to start the submersible pump 508, a temperature rise experiment is carried out, after the temperature is stable, and recording the temperature value of the optical fiber of an oil outlet 107 at the top of the oil tank as the temperature of the top layer of the oil, recording the temperature value of the optical fiber of an oil inlet 108 at the bottom of the oil tank and calculating the average temperature of the oil. On the basis of the bottom blowing experiment, when the finned radiator 205 is changed to the side blowing mode, two fans 206 are suspended on one side of four groups of finned radiators 205 and arranged up and down. And other connections and settings are unchanged, a temperature rise experiment is carried out again, after the temperature is stable, the temperature value of 107 optical fibers of the oil outlet at the top of the oil tank is recorded as the temperature of the top layer of the oil, the temperature value of 108 optical fibers of the oil inlet at the bottom of the oil tank is recorded, and the average temperature of the oil is calculated. And comparing the two experimental results, thereby achieving the cooling effect of the finned radiator in the bottom blowing and side blowing modes.
Claims (6)
1. The utility model provides a transformer cooling comprehensive experiment platform that generates heat which characterized in that: contain transformer loss and produce system, cooling system, hydraulic lifting system, notes oil drain system and electric measurement system, the output and the cooling system of transformer loss production system are connected, and hydraulic lifting system sets up in the cooling system below, and the output and the transformer loss of annotating the oil drain system produce the headtotail, and electric measurement system produces system, cooling system and notes oil drain system with the transformer loss respectively and is connected.
2. The comprehensive experimental platform for heating and cooling of the transformer according to claim 1, characterized in that: the transformer loss generating system comprises a transformer oil tank (101), a hollow winding (102), transformer oil (103), an oil storage cabinet (104), an oil guide pipeline (105), a support (106), an oil outlet (107) at the top of the oil tank, an oil inlet (108) at the bottom of the oil tank, a first oil inlet (109) at the side wall of the oil tank and a second oil inlet (110) at the side wall of the oil tank; the oil conservator (104) is arranged at the upper part of the transformer oil tank (101) and is communicated with the transformer oil tank (101), and the transformer oil (103) is fully arranged in the transformer oil tank (101); the hollow winding (102) is arranged inside the transformer oil tank (101); an oil outlet (107) at the top of the oil tank is arranged at the top of the transformer oil tank (101), an oil inlet I (109) at the side wall of the oil tank and an oil inlet II (110) at the side wall of the oil tank are arranged at the lower position of the side wall of the transformer oil tank (101), and an oil inlet (108) at the bottom of the oil tank is arranged at the bottom of the transformer oil tank (101); the upper end of the oil guide pipeline (105) is connected with the hollow winding (102), and the lower end of the oil guide pipeline is communicated with an oil inlet (108) at the bottom of the oil tank; the bracket (106) is arranged at the bottom of the transformer oil tank (101); the hollow winding (102) is a continuous pancake winding made of flat copper wire.
3. The comprehensive experimental platform for heating and cooling of the transformer according to claim 1, characterized in that: the cooling system comprises a radiator oil inlet (201), a radiator oil outlet (202), an oil collecting pipe (203), a butterfly valve (204), a plate radiator (205) and a fan (206); the finned radiators (205) are four groups, and the number of the fans (206) is two; when the bottom blowing mode of the finned radiator is adopted, two fans (206) are hung at the bottoms of four groups of finned radiators (205), and one fan is arranged on each group of finned radiators (205); when the finned radiator side blowing mode is adopted, two fans (206) are hung on one side of four groups of finned radiators (205) and are arranged up and down; the oil collecting pipes (203) and the butterfly valves (204) are respectively provided with two, the radiator oil inlet (201) is sequentially connected with one group of oil collecting pipes (203) and the butterfly valves (204) and is arranged at the upper end of the finned radiator (205), and the radiator oil outlet (202) is sequentially connected with the other group of oil collecting pipes (203) and the butterfly valves (204) and is arranged at the lower end of the finned radiator (205).
4. The comprehensive experimental platform for heating and cooling of the transformer according to claim 1, characterized in that: the hydraulic lifting system is composed of a chassis (301), a hydraulic component (302), an electrical component (303), a lifting frame (304), an upper platform (305) and a scale (306); the lifting frame is characterized in that the chassis (301), the lifting frame (304) and the upper platform (305) are sequentially arranged from bottom to top, the hydraulic part (302) is arranged at the bottom of the lifting frame (304), the electric part (303) is arranged on one side of the lifting frame (304) of the chassis (301), the electric part (303) is connected with the input end of the hydraulic part (302), the output end of the hydraulic part (302) is connected with the lifting frame (304), the scale (306) is arranged on one side of the chassis (301), the lifting frame (304) and the upper platform (305), and the bottom of the hydraulic part is level with the bottom of the chassis (301); the plate radiator (205) of the cooling system is arranged on an upper platform (305) of the hydraulic lifting system.
5. The comprehensive experimental platform for heating and cooling of the transformer according to claim 1, characterized in that: the oil injection and drainage system comprises an oil storage barrel (401), a filter (402), an oil pipeline (403), an oil injection and drainage pump (404), an oil tank filling port (405) and an oil conservator scale (406); the filter (402) is arranged in the oil storage barrel (401) and is connected with the oil injection and discharge pump (404) through an oil delivery pipe (403), the output end of the oil injection and discharge pump (404) is connected with a transformer loss generating system through the oil delivery pipe (403) and an oil tank oil injection port (405), and the oil conservator scale (406) is arranged on an oil conservator (104) of the transformer loss generating system.
6. The use method of the comprehensive experiment platform for heating and cooling of the transformer is characterized by comprising the following steps of:
① the transformer can be cooled in different ways including ONAN, ONAF, ODAF and OFAF, and comprises the following steps:
any one of a first oil inlet on the side wall of an oil tank and a second oil inlet on the side wall of the oil tank in the transformer loss generation system is connected with an oil outlet of a radiator of the cooling system through a hose, an oil outlet on the top of the oil tank of the transformer loss generation system is connected with an oil inlet of the radiator of the cooling system through a hose, a fan is closed by cutting off a third breaker in the electrical measurement system, an oil-submersible pump is closed by cutting off a fourth breaker in the electrical measurement system, and the connection mode is an ONAN cooling mode; any one of a first oil inlet on the side wall of an oil tank and a second oil inlet on the side wall of the oil tank in the transformer loss generation system is connected with an oil outlet of a radiator of the cooling system through a hose, an oil outlet on the top of the oil tank of the transformer loss generation system is connected with an oil inlet of the radiator of the cooling system through a hose, a third circuit breaker in the electrical measurement system is closed to start a fan, a fourth circuit breaker in the electrical measurement system is cut off to close the submersible pump, and the connection mode is an ONAF cooling mode; any one of a first oil inlet on the side wall of an oil tank and a second oil inlet on the side wall of the oil tank of the transformer loss generating system is connected with an oil outlet of a radiator of the cooling system through a hose, an oil outlet on the top of the oil tank of the transformer loss generating system is connected with an oil inlet of the radiator of the cooling system through a hose, a third circuit breaker in the electrical measurement system is closed, so that a fan is started, a fourth circuit breaker is closed, so that the submersible pump is started, and the connection mode is an OFAF cooling; an oil inlet at the bottom of an oil tank of the transformer loss generating system is connected with an oil outlet of a radiator of the cooling system through a hose, an oil outlet at the top of the oil tank of the transformer loss generating system is connected with an oil inlet of the radiator of the cooling system through a hose, a third circuit breaker in the electrical measurement system is closed to start a fan, and a fourth circuit breaker in the electrical measurement system is closed to start an oil-submerged pump, wherein the connection mode is an ODAF cooling mode;
②, the method realizes the cooling effect of the transformer under the condition of different height differences between the heating center and the heat dissipation center, and comprises the following steps:
under different cooling modes, including ONAN, ONAF, ODAF and OFAF, selecting a cooling mode at will, such as selecting an ODAF cooling mode, determining that the input power of a winding is constant, performing a temperature rise experiment, recording the temperature value of an optical fiber at an oil outlet at the top of an oil tank as the temperature of an oil top layer after the temperature is stable, recording the temperature value of an optical fiber at an oil inlet at the bottom of the oil tank, and calculating the average temperature of oil; then closing an electric part in the hydraulic lifting system, adjusting the lifting frame through the hydraulic part, further adjusting the upper platform, determining the height of the finned radiator through the scale, keeping the same input power, performing a temperature rise experiment again, recording the temperature value of the optical fiber at the oil outlet at the top of the oil tank as the temperature of the top layer of the oil after the temperature reaches a stable state, recording the temperature value of the optical fiber at the oil inlet at the bottom of the oil tank, and calculating the average temperature of the oil; finally, the average oil temperature and the temperature change of the top oil layer of the radiator under different heights are compared, so that the cooling effect of the transformer under different height differences of the heating center and the radiating center is realized;
③ the oil inlet of the transformer oil tank has cooling effect at different heights, comprising the following steps:
under different cooling modes including ONAN, ONAF and OFAF, a cooling mode is selected at will, for example, the ONAN cooling mode is selected, a first oil inlet on the side wall of an oil tank in a transformer loss generation system is connected with an oil outlet of a radiator of the cooling system through a hose, an oil outlet on the top of the oil tank of the transformer loss generation system is connected with an oil inlet of the radiator of the cooling system through a hose, a third circuit breaker in an electrical measurement system is cut off so as to close a fan, a fourth circuit breaker in the electrical measurement system is cut off so as to close an oil submersible pump, the input power of a winding is determined to be constant, a temperature rise experiment is carried out, after the temperature is stabilized, the optical fiber temperature value of the oil outlet on the top of the oil tank is; on the basis of the existing experiment, only changing an oil inlet on the side wall of an oil tank in a transformer loss generation system to be connected with an oil outlet of a radiator of a cooling system through a hose, keeping other connections and settings unchanged, performing a temperature rise experiment again, recording the temperature value of optical fibers at the oil outlet at the top of the oil tank as the temperature of an oil top layer after the temperature is stable, recording the temperature value of the optical fibers at the oil inlet at the bottom of the oil tank, and calculating the average temperature of oil; comparing the two experimental results, thereby achieving the cooling effect of the oil inlet of the transformer oil tank at different heights;
④, the method comprises the following steps:
in different cooling modes, the method comprises the following steps: under ONAF, ODAF and OFAF, a cooling mode is selected at will, for example, the ODAF cooling mode is selected, an oil inlet at the bottom of an oil tank of a transformer loss generation system is connected with an oil outlet of a radiator of the cooling system through a hose, an oil outlet at the top of the oil tank of the transformer loss generation system is connected with an oil inlet of the radiator of the cooling system through a hose, two fans are suspended and configured at the bottoms of four groups of plate radiators, namely, a bottom blowing mode is adopted, the input power of a winding is determined to be constant, a third circuit breaker in an electrical measurement system is closed, so that the fans are started, a fourth circuit breaker in the electrical measurement system is closed, so that an oil submersible pump is started, a temperature rise experiment is carried out, after the temperature is stable, the optical fiber temperature value of; on the basis of a bottom blowing experiment, when the finned radiator is changed into a side blowing mode, two fans are hung on one side of four groups of finned radiators and are arranged up and down; other connections and settings are unchanged, a temperature rise experiment is carried out again, after the temperature is stable, the temperature value of the optical fiber at the oil outlet at the top of the oil tank is recorded as the temperature of the oil top layer, the temperature value of the optical fiber at the oil inlet at the bottom of the oil tank is recorded, and the average temperature of the oil is calculated; and comparing the two experimental results, thereby achieving the cooling effect of the finned radiator in the bottom blowing and side blowing modes.
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| CN201911341815.5A CN111025066A (en) | 2019-12-24 | 2019-12-24 | Transformer heating and cooling comprehensive experiment platform and using method thereof |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114914054A (en) * | 2022-04-07 | 2022-08-16 | 上海正尔智能科技股份有限公司 | Transformer with loss monitoring assembly |
| CN117110765A (en) * | 2023-10-16 | 2023-11-24 | 新沂普迪机械设备有限公司 | Miniature transformer radiating effect batch temperature detection equipment |
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2019
- 2019-12-24 CN CN201911341815.5A patent/CN111025066A/en active Pending
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114914054A (en) * | 2022-04-07 | 2022-08-16 | 上海正尔智能科技股份有限公司 | Transformer with loss monitoring assembly |
| CN114914054B (en) * | 2022-04-07 | 2023-02-10 | 上海正尔智能科技股份有限公司 | Transformer with loss monitoring assembly |
| CN117110765A (en) * | 2023-10-16 | 2023-11-24 | 新沂普迪机械设备有限公司 | Miniature transformer radiating effect batch temperature detection equipment |
| CN117110765B (en) * | 2023-10-16 | 2023-12-29 | 新沂普迪机械设备有限公司 | Miniature transformer radiating effect batch temperature detection equipment |
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