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Transformer fault control method

A transformer fault and control method technology, applied in the direction of instruments, measuring electrical variables, measuring devices, etc., can solve problems such as complex process, cumbersome calculation, misjudgment, etc., and achieve the effect of reducing diagnostic errors

Inactive Publication Date: 2014-10-15
JIANGSU HUASHENG ELECTRICAL CO LTD
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Problems solved by technology

[0007] The technical problem to be solved by the present invention is: using the IEC three-ratio method to carry out fault diagnosis and analysis on the operating state of the transformer, because the process is complicated, the calculation is cumbersome, and the ratio interval of the ratio coding boundary is blurred and other reasons often cause misjudgment

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Embodiment Construction

[0049] The implementation of the present invention will be described in detail below in conjunction with the accompanying drawings and examples, so as to fully understand and implement the process of how to apply technical means to solve technical problems and achieve technical effects in the present invention.

[0050] The present invention relates to a working procedure for detecting peripheral circuits of power transformers. Such as figure 1 As shown, it includes the establishment of state information database and fault archives, as well as four working procedures such as signal detection, feature extraction, state recognition and forecast decision-making.

[0051] ① Signal detection

[0052] It is mainly to measure the status signal related to the fault. The status signal is the only carrier of fault information and the only basis for diagnosis. Therefore, it is very important to obtain the state information of the detected object timely and accurately in state monitori...

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Abstract

The invention discloses a transformer fault control method which comprises a power transformer peripheral circuit detection sub-method and a power transformer inner portion detection sub-method. The power transformer inner portion detection sub-method further comprises a neural network fault diagnosis step. In a power transformer inner portion detection subsystem, a neural network learns sample sets from the input to the output, so that the mapping relation between the input to the output is realized, minimum operation is achieved and meanwhile, the nonlinear mapping relation between fault phenomena and reasons can be established, any continuous mode pair (Xk, Tk; k=1, 2,..., m) can be stored, and the mapping from the input {Xk} to expected output {Zk} can be finished. By utilizing the integration method and by utilizing the fuzzy diagnosis technology, the unavoidable misjudgement problems of diagnosis errors or incomplete diagnosis results caused when a single transformer fault control method is utilized to carry out diagnosis are effectively reduced.

Description

technical field [0001] The invention relates to a mechanical fault control method, in particular to a transformer fault control method. Background technique [0002] The power transformer is an important substation equipment in the power system, and its operating status directly affects the safety and stability of the system. Early detection of latent faults of transformers to ensure the safe operation of transformers, thereby improving the reliability of power supply is an important issue concerned by the power sector. Practice has proved that the three-ratio method and the improved electric co-research method are very effective in discovering the latent faults and their development trends inside the transformer. The three-ratio method and the improved electric co-research method are widely used in various countries because of their simplicity and convenience. However, due to the differences in transformer capacity, voltage level, insulation structure, operation history, ...

Claims

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Application Information

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IPC IPC(8): G01R31/00
Inventor 许唯张守国葛玉华
Owner JIANGSU HUASHENG ELECTRICAL CO LTD
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