CN-122025355-A - Transformer temperature control device and temperature control method thereof

CN122025355ACN 122025355 ACN122025355 ACN 122025355ACN-122025355-A

Abstract

The invention discloses a temperature control device and a temperature control method of a transformer, wherein the temperature control device comprises a dry-change cross flow cooling fan, which is arranged on one side far away from a corresponding high-voltage connecting rod of the transformer, and an air inlet of the dry-change cross flow cooling fan is positioned on one side far away from the transformer. According to the invention, the temperature of each key part of the transformer is monitored in real time through the distributed optical fiber temperature measuring assembly, when the temperature of a certain area exceeds the standard, the dry variable cross flow cooling fan is started, external cold air is sucked through the air inlet far away from the side of the transformer, the air outlet at the top is sent into the rectangular air guide cover, the regulating assembly drives the corresponding baffle to rotate according to temperature distribution data, the strip-shaped air outlet is selectively opened, cold air is precisely blown to a high-temperature area, air flow between iron core columns is guided to a high-voltage terminal through the air guide assembly, the insulated weak parts are cooled in a key way, intelligent temperature control of 'comprehensive monitoring-fixed point cooling-efficient heat dissipation' is realized, the hot spot temperature of windings is effectively reduced, and operation safety is ensured.

Inventors

JIANG WEIGUO
YU GUANGSHENG
ZHENG WEI
YUAN XIAOZHONG
YU BIAO
ZHONG WENBIN

Assignees

广州发展鳌头能源站有限公司

Dates

Publication Date: 20260512
Application Date: 20260317

Claims (7)

1. A temperature control device for a transformer, comprising: The dry variable cross flow cooling fan (1) is arranged on one side far away from a corresponding high-voltage connecting rod of the transformer, an air inlet of the dry variable cross flow cooling fan (1) is positioned on one side far away from the transformer of the dry variable cross flow cooling fan (1), and an air outlet of the dry variable cross flow cooling fan (1) is positioned at the top of the dry variable cross flow cooling fan (1); The air guide mechanism (2), the air guide mechanism (2) comprises a rectangular air guide cover (21) arranged at an air outlet of the dry variable cross flow cooling fan (1), a plurality of strip-shaped air outlet holes which are distributed in an up-down arrangement are formed in one side, close to the transformer, of the rectangular air guide cover (21), a plurality of baffles (22) which are in one-to-one correspondence with the strip-shaped air outlet holes are rotatably arranged in one side, close to the transformer, of the rectangular air guide cover (21), and the air guide mechanism (2) further comprises a regulating and controlling assembly (23) which controls the baffles (22) to rotate towards one side, close to or far away from the strip-shaped air outlet holes; The flow guide assembly (3) is arranged on one side close to the corresponding high-voltage connecting rod of the transformer and is used for guiding air flow among three iron core columns of the transformer to blow to the high-voltage terminal; the temperature measuring optical fiber of the distributed optical fiber temperature measuring assembly is wound on the transformer and is used for measuring the temperature of the upper end part, the lower end part, the iron core and each wiring point of the transformer winding.
2. The temperature control device of the transformer according to claim 1, wherein the baffle plate (22) is rotationally connected with the rectangular wind scooper (21) through a torsion spring, and the baffle plate (22) is turned to a horizontal posture when the torsion spring is in a natural state; The regulating and controlling assembly (23) comprises two side plates (231) arranged on one side of the transformer close to the dry variable cross flow cooling fan (1), a screw rod sliding table (232) capable of sliding up and down is arranged between the two side plates (231), an electric screw rod (233) used for driving the screw rod sliding table (232) to move up and down is further arranged between the two side plates (231), a servo motor (234) is arranged on the screw rod sliding table (232), a deflector rod (235) is arranged at the output end of the servo motor (234), the deflector rod (235) is not located in an up-down moving area of the deflector rod (235) when one side close to the electric screw rod (233) rotates to a limit state, the deflector rod (235) can move down to push the deflector rod (22) to rotate to a bar-shaped air outlet hole when one side far away from the electric screw rod (233), and the regulating and controlling assembly (23) further comprises a locking component used for locking and unlocking the deflector rod (22) pushed to the bar-shaped air outlet hole.
3. The temperature control device for the transformer according to claim 2, wherein a groove is formed in one side, far away from the rectangular wind scooper (21), of each baffle (22), and two spring telescopic pins (24) are symmetrically arranged at the groove of each baffle (22); The locking part comprises a hanging frame (236) arranged at the top of a rectangular air guide cover (21), guide posts (237) penetrating through the hanging frame (236) are arranged at the top of the hanging frame (236), each guide post (237) consists of an anti-falling section and a movable section positioned at the bottom end of the corresponding anti-falling section, a through hole for the corresponding movable section to penetrate is formed in the hanging frame (236), the diameter of the corresponding anti-falling section is larger than the diameter of the through hole, locking posts (238) penetrating through grooves of each baffle plate (22) in sequence are arranged at the bottom end of each guide post (237), a pressure spring (239) is arranged between each locking post (238) and the hanging frame (236), a plurality of groups of inclined guide grooves are formed in one side, close to and far away from a transformer, of each locking post (238) is positioned at one side, far away from the transformer, of each spring telescoping pin (24) is positioned in a rotating area of each spring telescoping pin (24) when the pressure spring (239) is positioned in a natural state, and each spring (238) is positioned at one side, close to each spring telescoping pin (235) can be pushed to one side, far from each spring (235) of the rotating guide posts (235) can rotate towards one side, and the rotating limited guide posts (235) can be pushed to one side, which can move towards one side, when the spring (238) is positioned at one side, and the compression spring (233) can be pushed to move towards the compression guide posts.
4. The temperature control device for the transformer is characterized in that the flow guide assembly (3) comprises a base arranged on the transformer and two flow guide plates arranged at the top of the base, wherein the two flow guide plates are respectively positioned between two adjacent iron core columns, the flow guide plates are V-shaped plates, and one side of an opening of each flow guide plate is positioned at the side far away from the transformer.
5. A method for controlling the temperature of a transformer using a temperature control device for a transformer according to any one of claims 1to 4, comprising the steps of: s1, starting a distributed optical fiber temperature measuring assembly, and acquiring temperature data of an upper end part, a lower end part, an iron core and each wiring point position of a transformer winding in real time through a temperature measuring optical fiber wound on a transformer to form a multi-dimensional temperature monitoring data set; s2, comparing the collected temperature data of each point with a preset temperature threshold value respectively, and judging whether to trigger a cooling regulation action, wherein the preset temperature threshold value comprises a winding safety threshold value, an iron core safety threshold value and a wiring point safety threshold value; s3, when the temperature data of any point position reaches or exceeds a corresponding preset temperature threshold value, starting a dry-change cross-flow cooling fan (1), sucking external cold air through an air inlet at one side of the dry-change cross-flow cooling fan (1) far away from a transformer, and sending the external cold air into a rectangular air guide cover (21) of the air guide mechanism (2) through an air outlet at the top; S4, driving the baffle plate (22) to rotate through the regulating and controlling assembly (23), and adjusting the opening positions of the strip-shaped air outlet holes of the rectangular air guide cover (21) to enable cold air to be blown to the corresponding area with the temperature exceeding the standard in a targeted manner; S5, guiding air flow among three iron core columns of the transformer to converge and blow the air flow to the high-voltage terminal through the V-shaped guide plate of the guide assembly (3); S6, continuously acquiring temperature data by the distributed optical fiber temperature measuring assembly, and dynamically adjusting the angle of the baffle (22) according to the temperature change trend until the temperature of each point is lower than a corresponding preset temperature threshold.
6. The method for controlling the temperature of a transformer according to claim 5, wherein the specific process of adjusting and locking the angle of the baffle (22) in step S6 comprises: The electric screw rod (233) drives the screw rod sliding table (232) to move up and down along the side plate (231), the servo motor (234) and the deflector rod (235) are driven to move to the position above the baffle plate (22) corresponding to the normal temperature region, and the servo motor (234) drives the deflector rod (235) to rotate to the limit state to the side far away from the electric screw rod (233); The electric screw rod (233) drives the screw rod sliding table (232) to move downwards, the deflector rod (235) pushes the corresponding baffle plate (22) to rotate downwards against the elasticity of the torsion spring, so that the baffle plate (22) turns over towards the inside of the strip-shaped air outlet hole, and at the moment, the spring telescopic pin (24) is firstly compressed and passes over the locking column (238) under the guidance of the inclined guide groove at one side far away from the transformer, and then is reset and extended again, and is blocked by the locking column (238) to keep shielding the strip-shaped air outlet hole; When the temperature of the corresponding area is lower than a safety threshold, the electric screw rod (233) drives the screw rod sliding table (232) to move upwards until the deflector rod (235) pushes the locking column (238) to move upwards, so that the inclined guide groove originally positioned below the corresponding spring telescopic pin (24) moves upwards, the baffle plate (22) blocked by the locking column (238) and incapable of resetting can be guided by the inclined guide groove close to one side of the transformer under the thrust of torsion spring resetting, the spring telescopic pin (24) is compressed and passes through the locking column (238) firstly, and then is reset again to stretch out, so that each baffle plate (22) is in an initial state and waits for next regulation.
7. The transformer temperature control method according to claim 5, wherein the preset temperature threshold in the step S2 comprises a safety threshold, an overtemperature early warning threshold and a limit protection threshold which are sequentially increased, the running power and the temperature of the dry-change cross-flow cooling fan (1) in the step S3 are adjusted in a linkage mode, when the point position temperature reaches the overtemperature early warning threshold and does not exceed the limit protection threshold, the fan runs at 70% -80% of rated power, when the point position temperature reaches the limit protection threshold, the fan immediately switches to 100% of rated power to run until the corresponding point position temperature falls below the safety threshold, the fan switches back to 50% of rated power to maintain running for 30 minutes, and then the running is stopped.

Description

Transformer temperature control device and temperature control method thereof Technical Field The invention relates to the technical field of transformers, in particular to a temperature control device and a temperature control method for a transformer. Background The dry-type transformer is widely applied to places with high safety requirements such as high-rise buildings, airports and data centers by virtue of the advantages of fire prevention, explosion prevention, convenience in maintenance and the like. In the running process of the dry type transformer, a large amount of heat is generated by the winding, the iron core and the wiring terminals due to electromagnetic loss and resistance loss, if the heat cannot be timely dissipated, the equipment temperature is too high, the aging of an insulating layer is accelerated, the service life of the transformer is shortened, safety accidents such as short circuit and burning out can be caused in severe cases, and therefore a reliable temperature control device is required to be configured to realize accurate temperature control. The traditional dry-type transformer mostly adopts a platinum resistor as a temperature measuring element, and has the obvious technical shortboards that firstly, the temperature measuring precision is poor, the temperature measuring precision is influenced by strong electromagnetic interference of the operation of the transformer, the temperature measuring error is large, the temperature measuring error is easy to age and drift after being in a high-temperature environment for a long time, the temperature measuring distortion is further aggravated, secondly, the response is lagged, the temperature change of key parts such as a winding, an iron core and the like can not be captured in real time, and the early warning of local heat accumulation is difficult. More importantly, the adaptability of traditional heat-dissipating equipment and temperature measurement system is poor, only can realize the uniform heat dissipation of universe, can't be directed against the accurate air supply of heat accumulation position, leads to hot spot regional heat to pile up unable quick effluvium, and the regional excessive cooling of low temperature causes the energy consumption extravagant, and whole control by temperature change effect is not good, is difficult to satisfy the high-efficient, accurate control by temperature change demand of dry-type transformer. Disclosure of Invention The invention aims to overcome the defects of the prior art, and provides a temperature control device and a temperature control method thereof for a transformer, which realize the effects of accurate temperature measurement and targeted heat dissipation. In order to solve the technical problems, the invention adopts the following technical scheme that the temperature control device of the transformer comprises: the air inlet of the dry variable cross flow cooling fan is positioned at one side of the dry variable cross flow cooling fan away from the transformer, and the air outlet of the dry variable cross flow cooling fan is positioned at the top of the dry variable cross flow cooling fan; The air guide mechanism comprises a rectangular air guide cover arranged at an air outlet of the dry variable cross flow cooling fan, a plurality of strip-shaped air outlet holes which are distributed in an up-down arrangement are formed in one side, close to the transformer, of the rectangular air guide cover, a plurality of baffles which are in one-to-one correspondence with the strip-shaped air outlet holes are rotatably arranged in one side, close to the transformer, of the rectangular air guide cover, and the air guide mechanism further comprises a regulating and controlling assembly for controlling the baffles to rotate towards one side, close to or far from the strip-shaped air outlet holes; The flow guide assembly is arranged on one side close to the corresponding high-voltage connecting rod of the transformer and is used for guiding airflow among three iron core columns of the transformer to blow to the high-voltage terminal; the temperature measuring optical fiber of the distributed optical fiber temperature measuring assembly is wound on the transformer and is used for measuring the temperature of the upper end part, the lower end part, the iron core and each wiring point of the transformer winding. Further, the baffle is rotationally connected with the rectangular wind scooper through a torsion spring, and the baffle is turned to a horizontal posture when the torsion spring is in a natural state; The regulating and controlling assembly comprises two side plates arranged on one side of the transformer, which is close to the transformer, of the dry-type variable cross flow cooling fan, a screw rod sliding table capable of sliding up and down is arranged between the two side plates, an electric screw rod used for driving the screw rod sliding table to move up and down is furt