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

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...

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 reactor, inter-turn or inter-layer short circuit, instantaneous damage to the equipment, and may further expand the scope of the accident. , causing serious economic losses

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