Detection system and method of injection-type stator grounding protection device

A stator grounding protection and injection technology, which is applied in the direction of electronic protection circuit testing, electronic circuit testing, etc.

Active Publication Date: 2019-10-15
CHINA ELECTRIC POWER RES INST +1
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] The technical solution of the present invention provides a detection system and method for an injection-type stator grounding protection device to solve the problem of how to detect the injection-type stator grounding protection device

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  • Detection system and method of injection-type stator grounding protection device
  • Detection system and method of injection-type stator grounding protection device

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Embodiment Construction

[0037] Exemplary embodiments of the present invention will now be described with reference to the drawings; however, the present invention may be embodied in many different forms and are not limited to the embodiments described herein, which are provided for the purpose of exhaustively and completely disclosing the present invention. invention and fully convey the scope of the invention to those skilled in the art. The terms used in the exemplary embodiments shown in the drawings do not limit the present invention. In the figures, the same units / elements are given the same reference numerals.

[0038] Unless otherwise specified, the terms (including scientific and technical terms) used herein have the commonly understood meanings to those skilled in the art. In addition, it can be understood that terms defined by commonly used dictionaries should be understood to have consistent meanings in the context of their related fields, and should not be understood as idealized or over...

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Abstract

The invention discloses a detection system of an injection-type stator grounding protection device. The system comprises: a synchronizer physical simulation unit, wherein the synchronizer physical simulation unit is connected to a high-voltage side bus physical simulation unit through a step-up transformer physical simulation unit; a neutral point side of the synchronizer physical simulation unite is connected to a primary side of a grounding transformer physical simulation unit; a secondary side of the grounding transformer physical simulation unit is connected to a load resistance physicalsimulation unit; an injection-type power supply physical simulation unit and a voltage transformer physical simulation unit are connected in parallel to two ends of a load resistance simulation unit through a current transformer physical simulation unit; the load resistance physical simulation unit comprises three resistors with different resistance values, and the three resistors with different resistance values are of a pi-shaped structure; and the current transformer physical simulation unit is connected to the voltage transformer physical simulation unit and a wave recorder unit.

Description

technical field [0001] The present invention relates to the technical field of grounding protection devices, and more particularly, to a detection system and method for an injection-type stator grounding protection device. Background technique [0002] Stator grounding is the most common fault in generators, and the most widely used stator grounding protection is 100% stator grounding protection composed of fundamental wave zero-sequence voltage and third harmonic voltage. With the increase of the unit capacity of the generator, the capacitance of the stator to the ground increases, and the damage to the equipment due to the increase of the stator ground fault current increases accordingly, and higher requirements are put forward for the single-phase ground protection of the generator stator. The sensitivities of the above two stator ground protections vary with the fault location and are affected by some factors, so it is difficult to fully meet the high sensitivity require...

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01R31/28
CPCG01R31/2827Y04S10/52
Inventor 李岩军詹荣荣周春霞刘龙浩陈争光董明会周泽昕余越詹智华孟江雯金龙崔佳
Owner CHINA ELECTRIC POWER RES INST
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