On-line monitoring and protecting device for series reactor

Abstract

The invention relates to an on-line monitoring and protecting device for a series reactor, which is used for preventing fire catching and burnout of a coil, and other accidents caused by turn-to-turn short circuit of a reactor, and belongs to the field of on-line monitoring and protecting technology of reactors. The technical scheme is that the on-line monitoring and protecting device comprises a reactor (2), an exploring coil (3), an isolation transformator (4), a filter module (5), a data acquisition module (8) and a control computer (9); the exploring coil is arranged on the reactor; the output of the exploring coil is connected with the isolation transformator; the output of the isolation transformator is connected with the filter module; the output of the filter module is connected with the data acquisition module; and the output of the data acquisition module is connected with the control computer. The device has the functions of effectively monitoring accidents of turn-to-turn short circuit of the reactor, cutting off the circuit of a faulted reactor the first time under the unattended condition, protecting a system and other equipment from being influenced, and avoiding accident expansion caused by short circuit and fire catching.

Description

technical field [0001] The invention relates to an on-line monitoring and protection device for a series reactor, which is used for preventing accidents such as coil fire and burning caused by a short circuit between turns of the reactor, and belongs to the technical field of on-line monitoring and protection of the reactor. Background technique [0002] At present, my country's power grid construction is accelerating, the scale is expanding, and the construction of substations is also increasing. With the development of science and technology and the progress of society, people's awareness of protecting nature is getting stronger and stronger. Oil-free dry-type reactors have gradually become the mainstream of reactor products and are widely used in the field of power transmission and transformation. However, once the insulation of the dry-type air-core reactor is improperly handled, the encapsulation enters water, or the insulation ages to a certain extent, the weak insulat...

AI Technical Summary

Problems solved by technology

However, once the insulation of the dry-type air-core reactor is improperly handled, the encapsulation enters water, or the insulation ages to a certain extent, the weak insulation layer will not play an insulating role. A short-circuit ring will be formed. At this time, the temperature of the short-circuit ring rises sharply, causing the insulation of the adjacent wire layer to be destroyed, and the accident occurs quickly. The whole process only takes tens of seconds.

Although polyester film, glass fiber yarn and epoxy resin are all flame-retardant materials, the insulation layer is carbonized at high temperature under a huge short-circuit current, and reactor fire accidents are common, which endangers the operation safety of other equipment.

The detection and protection methods of the background technology have limited effects, and cannot detect inter-turn short circuit phenomena. In addition, unmanned substations and unpredictability of accidents, the effect of preventing reactor fire accidents is still unsatisfactory.

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