Device and method for monitoring and protecting series reactor

Abstract

The invention discloses a device and a method for monitoring and protecting a series reactor. A search coil assembly is arranged inside or outside a dry type air core reactor coil body; one side of the search coil assembly corresponds to the reactor; the other side of the search coil assembly is correspondingly provided with an isolation transformer; one end of the isolation transformer is grounded; the other end of the isolation transformer is connected in series with a filter module; the filter module, a resistor and a TVS (Transient Voltage Suppressor) are connected in series in sequence and then grounded; the filter module and a data acquisition module are connected in series in sequence and then grounded; and the data acquisition module is connected with a control computer. The device and the method for monitoring and protecting the series reactor have the beneficial effects that the occurrence of serious accidents such as reactor firing is prevented, and the operation safety coefficient of a current limiting reactor is improved, so that the safe operation of the transformer is guaranteed.

Description

technical field [0001] The invention belongs to the field of electric power equipment, and relates to a new device for preventing coils from igniting and burning due to inter-turn short circuit of a reactor, in particular to an online monitoring and protection device for a series reactor. Background technique [0002] Since the reform and opening up, the construction of my country's power grid has been accelerated, the scale has expanded, and the construction of substations has also increased. 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 dry-type air-core reactor has improper insulation treatment, encapsulation water ingress, or insulation aging to a certain extent, the weak insulation layer cannot...

AI Technical Summary

Problems solved by technology

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

In view of the limited effectiveness of current detection and protection methods, the inability to detect inter-turn short circuits, coupled with unmanned substations and the unpredictability of accidents, the effect of preventing reactor fire accidents is still not satisfactory

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