Apparatus and method for simulating local discharge defect of transformer
A partial discharge and simulation device technology, which is applied in the direction of testing circuits, testing dielectric strength, etc., can solve the problems of complex transformer structure, insufficient accuracy and effectiveness of detection methods, etc.
Active Publication Date: 2017-01-04
STATE GRID CORP OF CHINA +2
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Problems solved by technology
At present, the partial discharge detection methods of transformers mainly include pulse current method, ultrasonic method and ultra-high frequency method. However, due to the complex internal structure of transformers, the accuracy and effectiveness of these detection methods have certain deficiencies.
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Embodiment Construction
[0023] The present invention will be further described below in conjunction with the accompanying drawings and embodiments.
[0024] see figure 1 , a transformer partial discharge defect simulation device, including a power transformer 1, a voltage regulator 2 and an implantable discharge source 3;
[0025] Wherein, both the voltage regulator 2 and the implantable discharge source 3 are connected to the power transformer 1;
[0026] The head and tail ends of the middle and low voltage winding coils of the power transformer are disconnected, and the tail ends are respectively connected to the x end, y end and z end provided outside the housing through a 10kV bushing;
[0027] The first, fourth, and seventh voltage regulation gear ends of the high-voltage voltage regulation coil in the power transformer are respectively connected to the outside of the power transformer through 35kV bushings, and connected to the implantable discharge source;
[0028] The three-phase A, B, C hi...
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The invention discloses an apparatus and method for simulating local discharge defect of a transformer. The apparatus includes a power transformer, a voltage regulator and an implantable discharge source. The voltage regulator and the implantable discharge source are both connected to the power transformer. A low-voltage winding coil of the power transformer has head and tail ends disconnected, and the tail end is in separate connection to an x end, a y end and a z end which are arranged outside a housing through a 10kV sleeve. A high-voltage voltage-regulating coil of the power transformer has a first, a fourth, and a seventh voltage-regulating gear which are connected to the outside of the transformer through a 35kV sleeve and are connected to the implantable discharge source. The apparatus changes the connection of the windings inside the transformer, has low cost and is easy to use. The apparatus can simulate all kinds of local discharge types at different positions inside the transformer, can reflect local discharge inside the transformer, conduces to timely finding and maintenance of local discharge breakdown of the transformer, and prolongs service life of the transformer.
Description
technical field [0001] The invention belongs to the technical field of electric power engineering, and in particular relates to a transformer partial discharge defect simulation device and method. Background technique [0002] The transformer is the core equipment of the power grid system, and it is also one of the most expensive equipment. Its operation status directly affects the safety and stability of the entire power grid system. Due to the reasons of design and manufacture, process materials, operation and maintenance, and operating environment, internal insulation faults of transformers occur from time to time. Partial discharges are generally generated in the initial stage of transformer internal insulation faults, so it is very necessary to ensure the sensitivity and accuracy of partial discharge signal monitoring. At present, the partial discharge detection methods of transformers mainly include pulse current method, ultrasonic method and ultra-high frequency meth...
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IPC IPC(8): G01R31/14
CPCG01R31/14
Inventor 刘赟赵世华叶会生孙利朋万勋秦家远谢耀恒彭平何智强
Owner STATE GRID CORP OF CHINA