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Power transformer operation state assessment method under measurement big data

A technology for power transformers and operating states, which is applied in the direction of measuring electrical variables, measuring electricity, instruments, etc., can solve problems such as failure to early warning of power transformer faults and inability to achieve real-time monitoring, and achieve the effect of solving fault maintenance problems.

Inactive Publication Date: 2018-11-06
DALIAN UNIV OF TECH +1
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AI Technical Summary

Problems solved by technology

However, the change of transformer oil quality is a cumulative process, that is, the current transformer monitoring cannot achieve the purpose of real-time monitoring, and cannot provide timely early warning for sudden power transformer failures

Method used

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  • Power transformer operation state assessment method under measurement big data
  • Power transformer operation state assessment method under measurement big data
  • Power transformer operation state assessment method under measurement big data

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Experimental program
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Embodiment Construction

[0041] The present invention will be further described below in conjunction with specific examples.

[0042] This method is applied to the 500kv autotransformer in Wafangdian, Dalian. Figure four The monitoring and estimation process is shown. First, compare the measured temperature with the predicted temperature through big data. If a large temperature difference occurs, estimate the structural parameters of the transformer. If the structural data is found to be abnormal, an alarm will be sent to the superior of the power system for transformer repair and maintenance. Specific steps are as follows:

[0043] The first step is to use the transformer temperature rise calculation formula to draw the load-temperature rise curve, calculate the winding temperature under each possible load, and obtain the basic corresponding database under the standard state as the benchmark for the next temperature comparison. Among them, the basic relationship in the calculation of temperature r...

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Abstract

The invention belongs to the field of power system operation assessment and monitoring, and provides a power transformer operation state assessment method under measurement big data. According to themethod, the transformer temperature rise is judged by using the transformer state operation parameter and the transformer output load so as to calculate the transformer winding temperature; then whether the transformer is in the fault operation state is judged by using the transformer winding temperature; and the transformer structural parameters are calculated through the transformer mathematicalmodel so as to judge the reason of the transformer problem. The fault maintenance problem of the enclosed transformer can be effectively solved, the power transformer fault can be discovered in time,and normal operation of the transformer can be guaranteed and stable operation of the power system can be maintained by applying the measurement big data.

Description

technical field [0001] The invention belongs to the field of power system operation evaluation and monitoring, and relates to a transformer operation parameter estimation method, in particular to a power system measurement big data fitting and analysis method. Background technique [0002] With the development of smart grid and the popularization and application of measurement devices such as SCADA and PMU in the power grid, the power system has ushered in the "big data era". Big data, or huge amount of data, massive data, is a collection of data composed of huge quantity, complex structure, and many types of data. Intellectual resources and knowledge service capabilities. In short, the ability to quickly dig deep and extract valuable resources from many types of massive data is big data technology. The emergence of power big data also provides a new means for the operation monitoring of transformer parameters. [0003] There are a variety of sensors inside the transforme...

Claims

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Application Information

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IPC IPC(8): G01R31/00G01K13/00
CPCG01K13/00G01R31/00
Inventor 孙辉高正男孙越峰吴昊王顺江周玮胡姝博彭飞翔王昊天刘重苏安龙高凯葛维春赵军王洪哲凌兆伟句荣斌王铎金宜放
Owner DALIAN UNIV OF TECH
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