Generator rotor turn-to-turn short circuit diagnosis method based on RSO method

Abstract

The invention discloses a generator rotor turn-to-turn short circuit diagnosis method based on an RSO method, and belongs to the technical field of electronic rotors, the diagnosis method comprises a computer, an acquisition card, a generator rotor turn-to-turn short circuit analyzer and a collector ring sleeving the generator rotor, the collector ring comprises an inner ring and an outer ring, the inner ring and the outer ring are connected with a generator rotor turn-to-turn short circuit analyzer, the generator rotor turn-to-turn short circuit analyzer is connected with an acquisition card, and the acquisition card is connected with a computer; according to the invention, the turn-to-turn short circuit of the rotor can be found as early as possible, the fault of the turn-to-turn short circuit can be positioned, and the RSO can find the turn-to-turn metallic short circuit fault of the rotor as early as possible; a one-turn or multi-turn non-metallic short circuit insulation fault can be detected; and the specific coil or the specific slot position of the turn-to-turn short circuit of the rotor winding can be accurately determined, and the sensitivity is high.

Description

technical field [0001] The invention relates to the technical field of electronic rotors, in particular to a method for diagnosing a short circuit between turns of a generator rotor based on the RSO method. Background technique [0002] With the continuous increase of the unit capacity of generators, the inter-turn short-circuit faults of large-scale generator rotor windings are also increasing day by day. Although there are many detection and judgment methods for inter-turn short-circuit faults of rotor windings, most of them are not very accurate. It is difficult to judge the initial stage of the fault. The inter-turn short-circuit fault of the generator rotor is a more frequent fault type in recent years. For the more serious inter-turn short-circuit fault, due to the large changes in the electrical parameters such as rotor DC resistance and power loss, it often occurs. It is very intuitive to reflect the type of failure. However, practice has proved that for dynamic and...

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Problems solved by technology

[0002] With the continuous increase of the unit capacity of the generator, the inter-turn short-circuit faults of the rotor windings of large-scale generators are also increasing day by day. Although there are many detection and judgment methods for the inter-turn short-circuit faults of the rotor windings, most of them are not very accurate. It is difficult to judge the initial stage of the fault. The inter-turn short-circuit fault of the generator rotor is a more frequent fault type in recent years. For the more serious inter-turn short-circuit fault, due to the large changes in the electrical parameters such as rotor DC resistance and power loss, it will often occur. It is very intuitive to reflect the type of failure

However, practice has proved that for dynamic and slight rotor turn-to-turn short circuits, due to the insignificant change in electrical parameters, conventional methods such as analyzing generator rotor vibration and excitation current, testing DC resistance, and measuring rotor AC impedance often cannot accurately determine the fault.

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