Temperature protective dry-type air core reactor and temperature measuring method thereof

An air-core reactor, protective technology, used in emergency protection circuit devices, thermometers, emergency protection devices with automatic disconnection, etc. The effect of expanding the scope and avoiding economic losses

Inactive Publication Date: 2009-10-14
庞挺
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Once the operating temperature of the reactor is too high (it may be caused by the reactor itself or other equipment failure), it will cause insulation breakdown of the re

Method used

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  • Temperature protective dry-type air core reactor and temperature measuring method thereof
  • Temperature protective dry-type air core reactor and temperature measuring method thereof
  • Temperature protective dry-type air core reactor and temperature measuring method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment approach 1

[0013] Embodiment 1: Built-in fiber optic temperature sensor

[0014] When winding the dry-type air-core reactor coil, according to the conclusion obtained from the analysis of the temperature field, the built-in optical fiber temperature sensor 11 is wrapped on the wire 10 with alkali-free glass fiber cloth, and the optical cable 13 for transmitting optical signals Adhered to the insulating outer layer of the completed coil and drawn out. The outgoing optical cable is led to the photoelectric converter ≥ 2 meters away from the dry-type air-core reactor through the embedded pipe fittings (or directly led to the photoelectric converter in the main control room. The condition is that there are not too many turns and the angle is > 90 degrees) , convert the optical signal into an electrical signal, and amplify it to the working range of the temperature controller, and the temperature controller will display the appropriate temperature at this point of the dry-type air-core reacto...

Embodiment approach 2

[0015] Embodiment 2: External fiber optic temperature sensor

[0016] When winding the dry-type air-core reactor coil, the external optical fiber temperature sensor 15 is wound on the outer insulating layer 14 with alkali-free glass fiber cloth, and the epoxy resin of the dry-type air-core reactor is cured as a whole. Firmly attached to the surface of the coil insulation layer. And lead the optical cable 13 for transmitting the optical signal to the photoelectric converter along the insulating outer layer. By mastering the difference between the actual temperature of the coil and the temperature of the outer insulating layer, program a correction coefficient for the temperature controller, and use the principle that the refractive index of the light will change with the temperature when it is transmitted in the temperature-sensitive material, but the refractive index of the fiber core remains unchanged. , by detecting the comparison between the output light intensity and the ...

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PUM

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Abstract

The invention relates to a temperature protective dry-type air core reactor and a temperature measuring method thereof. The air core reactor comprises an upper starframe and a lower starframe (1,8), an upper starframe epoxy connection board and a lower starframe epoxy connection board (3,6), an epoxy board stay (9), an epoxy board (16), a dry-type air core reactor coil (10), a casing (17), a temperature sensor and a temperature control device. The dry-type air core reactor is characterized in that the temperature sensor is an optical fiber temperature measuring sensor which is attached at the surface or any point or a plurality of points inside and outside the insulating wrapping layer of the dry-type air core reactor. The dry-type air core reactor can work in the set temperature range after the temperature protection dry-type air core reactor is adopted, a temperature control instrument can make sound alarm and light alarm when the reactor works abnormally at the temperature above or below the set temperature range; and once the set upper limit is exceeded, the reactor and the matching devices thereof can be cut off from circuits in time, so that the expansion the accident range can be avoided and subsequently the economic loss can be avoided.

Description

technical field [0001] The invention relates to a reactor, in particular to a temperature-protected dry-type air-core reactor used in a power supply system and a temperature measuring method thereof. Background technique [0002] Since the advent of the dry-type air-core reactor, its low noise, good linearity, no magnetic saturation, and easy maintenance have made dry-type air-core reactors widely used in power supply and consumption systems. Its structure has the following particularities: 1. There is no magnetic core, so the magnetic flux leakage is large. Generally, temperature sensors made of ferromagnetic materials will generate eddy currents and generate heat in a strong magnetic field. The coils of dry-type air-core reactors are wrapped with epoxy resin and cured as a whole. The heat dissipation depends on the flowing air in the air passage between layers. Due to the poor thermal conductivity of the air, the high temperature generated by the temperature sensor will g...

Claims

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Application Information

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IPC IPC(8): H02H5/04H01F27/40G01K11/32
Inventor 庞挺李洁
Owner 庞挺
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