Differential power reactor fault on-line monitoring instrument

A reactor and differential technology, applied in the field of power reactor fault detection devices, can solve the problems of timeliness and poor accuracy, and achieve the effects of low reliability, strong anti-electromagnetic interference ability, and rapid response

Inactive Publication Date: 2012-06-13
古亮
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0010] In order to overcome the existing shortcomings such as timeliness and poor accuracy, the present i

Method used

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  • Differential power reactor fault on-line monitoring instrument
  • Differential power reactor fault on-line monitoring instrument
  • Differential power reactor fault on-line monitoring instrument

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Embodiment Construction

[0025] The present invention will be further described below in conjunction with the drawings and specific embodiments.

[0026] Such as figure 1 As shown, the differential power reactor fault on-line monitor includes a current transformer (in this embodiment, figure 1 Only the current transformer 1 and the current transformer 2), the scaling unit 8 and the data acquisition and processing unit 9 are shown in the figure. The proportional amplification unit 8 includes an adjustable resistor R1, an adjustable resistor R2, a resistor R3, a resistor R4, an adjustable resistor R5, an adjustable resistor R6, a resistor R7, an adjustable resistor R8, and an operational amplifier 10. One end of the adjustable resistor R1 is connected to one end of the adjustable resistor R2, and the other end of the adjustable resistor R2 is grounded; one end of the resistor R4 is connected to one end of the adjustable resistor R1, and the other end of the resistor R4 is connected to the reverse input of t...

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Abstract

The invention discloses a differential power reactor fault on-line monitoring instrument which comprises current transformers, proportional amplification units and data acquisition and processing units. Each bus aluminium bar branch of a reactor is provided with one current transformer for measuring a current of the branch. One group is formed by two current transformers. The two current transformers in each group have opposite secondary outlet polarities and are connected with the corresponding proportional amplification unit. Amplified current differential values are input into the corresponding data acquisition and processing units to be analysed and judged. Under the condition that the reactor does not have a fault, the amplified differential value output by each set of proportional amplification unit is close to zero; and when the reactor has faults of winding disconnection or turn-to-turn insulation discharge and the like, the differential value of the current transformer group connected with a fault winding is changed, and when the differential value exceeds a certain preset value, the data acquisition and processing unit outputs a reactor fault alarm signal. The monitoring instrument can be used for detecting the faults of power reactor disconnection or turn-to-turn partial discharge and the like and is reliable and rapid to respond.

Description

Technical field [0001] The invention relates to a power reactor fault detection device, in particular to a differential type power reactor fault online monitor. [0002] Background technique [0003] Large air-core power reactors play an indispensable role in reactive power compensation and high-voltage insulation coordination. Most reactors are formed by stacking several coil windings, and each winding is formed by connecting several thick conductors insulated from each other in parallel. The reactor works in a high voltage environment for a long time, and the current is large, and the heat is significant. Therefore, the reactor often has faults such as partial discharge and winding overcurrent fusing. These faults seriously affect the safety and stability of the power system. [0004] The existing literature shows that the detection methods of power reactor faults include: resistance value and reactance value measurement method, current measurement method, temperature measureme...

Claims

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Application Information

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IPC IPC(8): G01R31/06
Inventor 古亮夏岩松张金祥王建伟
Owner 古亮
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