Device and method for monitoring and protecting series reactor

A technology of series reactors and protection devices, which is applied in the direction of measuring devices, overcurrent protection, instruments, etc., can solve the problems of reactor fire accidents, endangering equipment operation safety, and limited effects, so as to avoid economic losses, Improve the safety factor and ensure the effect of safe operation

Inactive Publication Date: 2013-09-04
HERONG ELECTRIC
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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 equipm...

Method used

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  • Device and method for monitoring and protecting series reactor
  • Device and method for monitoring and protecting series reactor
  • Device and method for monitoring and protecting series reactor

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Embodiment Construction

[0032] The present invention is described in further detail below in conjunction with accompanying drawing:

[0033] see figure 1 , 2-1 , 2-2, 3-1, 3-2, 4-1 and 4-2, when the reactor is in normal operation, the magnetic field around the reactor is symmetrically distributed relative to the horizontal central axis. Turn-to-turn short circuit fault occurs ( Figure 3-2 In the case shown), the magnetic field generated by the reverse current of the short-circuit ring will weaken the original magnetic field. Therefore, the inter-turn short circuit fault makes the magnetic field distribution of the dry-type air-core reactor appear asymmetrical about the horizontal axis. At this time, the magnetic field distribution is no longer symmetrical about the horizontal central axis, that is, the magnetic field distribution is distorted. The problem of judging whether a dry-type air-core reactor has an inter-turn short circuit fault is transformed into a problem of judging whether the magn...

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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...

Claims

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Application Information

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IPC IPC(8): G01R31/02H02H3/08
Inventor 刘全峰梁艺超
Owner HERONG ELECTRIC
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