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CN-120971850-B - Monitoring device and monitoring method for power transformer of power distribution network

CN120971850BCN 120971850 BCN120971850 BCN 120971850BCN-120971850-B

Abstract

The invention discloses a power transformer monitoring device and a monitoring method for a power distribution network, wherein the device comprises an oil immersed transformer, an electric variable detector for detecting internal oil temperature is arranged on the oil immersed transformer, current/voltage waveforms are measured in real time, and the electric variable of the oil immersed transformer can be known in real time. According to the invention, the current/voltage waveform is measured in real time through the electronic transformer, so that the electric variable of the oil immersed transformer can be known in real time, the change of the transformer can be indirectly fed back through the temperature sensor to detect the oil temperature, the change of the transformer is more accurately detected through matching with the electronic transformer, and the oil immersed transformer can be stably and effectively radiated through matching with the temperature control mechanism through the electric variable detector.

Inventors

  • YUAN HONGJUN

Assignees

  • 江苏环东电气有限公司

Dates

Publication Date
20260505
Application Date
20250814

Claims (10)

  1. 1. The utility model provides a distribution network power transformer monitoring devices, includes oil-immersed transformer (1), support (2) are installed to one side of oil-immersed transformer (1), install conservator (3) on support (2), conservator (3) are connected with oil-immersed transformer (1) through conveyer pipe (4), characterized in that, install on oil-immersed transformer (1) be used for detecting inside oil temperature and real-time supervision oil-immersed transformer (1) electric variable detector (5) of electric current/voltage waveform, install on support (2) by electric variable detector (5) control and can be to the temperature control mechanism of oil circulation cooling of oil-immersed transformer (1) inside, temperature control mechanism is including install box (6) in support (2) bottom and rotate install in install box (6) and with serpentine temperature control pipe (31) that conservator (3) are connected, oil can circulate between oil conservator (3), serpentine temperature control pipe (31), install on support (2) and install by electric variable detector (5) control mechanism and can be to oil-immersed transformer (1) inside heat dissipation oil circulation cooling, install on install box (6) and install elastic filter box (18) and install in install fan (18), the fan (7) works to enable air to enter the installation box (6) through the elastic dust filtering net (18) and blow onto the serpentine temperature control tube (31) capable of rotating, and the cleaning mechanism is matched with the serpentine temperature control tube (31) to be arranged, so that the elastic dust filtering net (18) can be stretched and rolled, and the contact area with a filter is reduced.
  2. 2. The power distribution network power transformer monitoring device according to claim 1, wherein the mounting box (6) is provided with a pump body (16) connected with the oil immersed transformer (1) and the serpentine temperature control tube (31), and the pump body (16) works to enable heat dissipation oil to circularly flow in the oil immersed transformer (1), the conservator (3) and the serpentine temperature control tube (31).
  3. 3. The power distribution network power transformer monitoring device according to claim 2, wherein a liquid inlet pipe (11) is installed at a liquid inlet end of the pump body (16), the liquid inlet pipe (11) is connected with the oil immersed transformer (1), the liquid inlet pipe (11) is arranged close to the bottom of the oil immersed transformer (1), and a liquid outlet pipe (17) is installed at a liquid outlet end of the pump body (16).
  4. 4. A monitoring device for an electric transformer of an electric distribution network according to claim 3, further comprising a driving mechanism which is connected with the liquid outlet pipe (17) and can drive the serpentine temperature control pipe (31) to rotate, wherein the driving mechanism comprises a piston cylinder (21) which is installed in the installation box (6) and is connected with the liquid outlet pipe (17), a movable piston (30) is slidably connected in the piston cylinder (21), a first spring (29) is fixedly connected on the movable piston (30) and the piston cylinder (21), a driving rod (26) is fixedly connected on the movable piston (30), a rack plate (27) is fixedly connected on the driving rod (26), a first rotating pipe (10) and a second rotating pipe (12) which are coaxially arranged are respectively fixedly connected at two ends of the serpentine temperature control pipe (31), each of the first rotating pipe (10) and the second rotating pipe (12) penetrates through the installation box (6) and is rotatably connected with the installation box, a gear (28) is installed on the second rotating pipe (12), and the gear plate (28) is meshed with the rack plate (27).
  5. 5. The power distribution network power transformer monitoring device according to claim 4, wherein the end part of the first rotating pipe (10) is provided with a first rotating joint (9), a return pipe (8) is fixedly connected to the first rotating joint (9), the return pipe (8) is connected with the conservator (3), the second rotating pipe (12) is provided with a second rotating joint (13), the second rotating joint (13) is connected with a first oil feeding pipe (14) and a second oil feeding pipe (15), the first oil feeding pipe (14) and the second oil feeding pipe (15) are both connected with the piston cylinder (21), the first oil feeding pipe (14) is provided with an electromagnetic valve, and the second oil feeding pipe (15) is arranged opposite to the movable piston (30).
  6. 6. The power distribution network power transformer monitoring device according to claim 5, characterized in that, clearance mechanism is including rotating axostylus axostyle (20) of installing in install bin (6), run through on axostylus axostyle (20) be equipped with rather than sliding connection and montant (32) that can reset, the bottom of montant (32) is fixed with connecting block (19), connecting block (19) and elastic dust screen (18) fixed connection, the upper end of montant (32) is fixed with U type piece (23), U type piece (23) internal rotation is connected with short axle (24) that can reset, the cover is equipped with gag lever post (25) rather than fixed connection on short axle (24), gag lever post (25) and snakelike temperature control pipe (31) cooperation setting.
  7. 7. The power distribution network power transformer monitoring device according to claim 6, wherein a second spring (22) is fixed at the bottom of the U-shaped block (23), the lower end of the second spring (22) is fixed on the shaft lever (20), and the second spring (22) is sleeved outside the vertical rod (32).
  8. 8. The power distribution network power transformer monitoring device according to claim 7, wherein torsion springs are installed between two ends of the short shaft (24) and the U-shaped blocks (23), and the limiting rods (25) are horizontally arranged in a stable state of the torsion springs.
  9. 9. The power transformer monitoring device for the power distribution network according to claim 8, wherein a through hole (34) is formed in the shaft rod (20) in a penetrating mode, a spiral rod (33) connected in a matching mode is arranged in the through hole (34) in a penetrating mode, a connecting block (19) is fixedly arranged at the bottom of the spiral rod (33), the connecting block (19) is fixedly connected with an elastic dust filtering net (18), a U-shaped block (23) is rotatably connected to the upper end of the spiral rod (33), a short shaft (24) is rotatably connected to the U-shaped block (23), torsion springs are arranged between two ends of the short shaft (24) and the U-shaped block (23), a limit rod (25) fixedly connected with the short shaft (24) is sleeved on the short shaft, the limit rod (25) is matched with a serpentine temperature control tube (31), a second spring (22) is fixedly arranged at the bottom of the U-shaped block (23), the lower end of the second spring (22) is fixedly arranged on the shaft rod (20), and the second spring (22) is sleeved outside the spiral rod (33).
  10. 10. A method for monitoring a power transformer of a power distribution network, applied to the power transformer monitoring device of the power distribution network as claimed in claim 9, comprising the following steps: S1, measuring current/voltage waveforms in real time through an electronic transformer, and knowing the electrical variables of the oil immersed transformer (1) in real time; s2, the temperature of heat dissipation oil in the oil immersed transformer (1) can be detected through the electric variable detector (5), signals are transmitted to the controller, and the controller controls the pump body (16) and the fan (7) to work; s3, after a period of working, the electromagnetic valve is controlled to be intermittently opened and closed by the controller; S4, if the electric variable detector (5) detects that the oil temperature does not reach the set temperature for a long time, the fan (7) and the pump body (16) are in a non-working state.

Description

Monitoring device and monitoring method for power transformer of power distribution network Technical Field The invention relates to the technical field of transformer monitoring, in particular to a power distribution network power transformer monitoring device and a monitoring method. Background The oil immersed transformer is a novel high-performance transformer with more reasonable structure and better performance. The oil conservator is usually arranged on the oil immersed transformer, oil can be supplied to the oil immersed transformer, and when the temperature in the oil immersed transformer rises and expands, the oil flows into the oil conservator through a pipeline, so that pressure relief of the oil immersed transformer is realized. The oil immersed transformer can well dissipate heat of the transformer, but heat dissipation oil still needs to be dissipated, so that the heat dissipation fins are arranged outside the oil immersed transformer, a fan is arranged on each heat dissipation fin, a temperature monitoring device is arranged on the immersed transformer, when the oil temperature is monitored to be high, the fan is controlled to work, the fan dissipates heat of the heat dissipation fins with the transfer temperature, the heat dissipation of the oil temperature is achieved, but dust can be accumulated when the heat dissipation fins are located outside for a long time, the heat dissipation effect is reduced, the temperature of the heat dissipation oil cannot be effectively controlled, and even if the rotating speed of the fan can be controlled, the heat conduction effect of the heat dissipation fins for accumulating the dust is still poor. The prior art publication number is CN 119381118A's self-cooled transformer, and air flows through coil pipe and heating panel surface after radiator fan's acceleration, can dispel the heat to coil pipe and heating panel, but can't be to the effectual processing of dust, and like this the dust is attached on the coil pipe, can influence the heat transfer of coil pipe, especially is used for the open air, the more environment of cotton-wool dust. Therefore, the application provides a power transformer monitoring device and a monitoring method for a power distribution network. Disclosure of Invention The invention aims to solve the technical problems, and provides a power transformer monitoring device and a monitoring method for a power distribution network. In order to achieve the above purpose, the present invention adopts the following technical scheme: The utility model provides a distribution network power transformer monitoring devices, includes oil-immersed transformer, the support is installed to one side of oil-immersed transformer, install the conservator on the support, the conservator is connected with oil-immersed transformer through the conveyer pipe, its characterized in that, install the electric variable detector that is used for detecting inside oil temperature and real-time supervision oil-immersed transformer electric current/voltage waveform on the oil-immersed transformer, install the temperature control mechanism that is controlled by electric variable detector and can circulate cooling to oil-immersed transformer inside heat dissipation oil on the support, temperature control mechanism includes the mounting box of installing in the support bottom and rotates the serpentine control pipe of installing in the mounting box and being connected with the conservator, and heat dissipation oil can circulate between conservator, serpentine control pipe, the cleaning mechanism that installs in the mounting box and be connected with the elastic filter net is installed to the bottom of mounting box, install the fan on the mounting box, fan work makes the air enter into the mounting box and can rotate to the serpentine control pipe through the elastic filter net, the serpentine control mechanism that can reduce the area by the flexible filter net and the flexible filter net is stretched, the serpentine control mechanism that can be contacted with the winding filter net. Preferably, the liquid inlet end of the pump body is provided with a liquid inlet pipe, the liquid inlet pipe is connected with the oil immersed transformer, the liquid inlet pipe is arranged close to the bottom of the oil immersed transformer, and the liquid outlet end of the pump body is provided with a liquid outlet pipe. Preferably, the driving mechanism is connected with the liquid outlet pipe and can drive the serpentine temperature control pipe to rotate, the driving mechanism comprises a piston cylinder which is installed in the installation box and connected with the liquid outlet pipe, a movable piston is connected in a sliding mode in the piston cylinder, a first spring is fixedly connected to the movable piston and the piston cylinder, a driving rod is fixedly connected to the movable piston, a rack plate is fixedly connected to the driving rod, a first rotating pipe and a s