A real-time monitoring method of main transformer oil level based on equivalent limit oil temperature

Abstract

The invention provides a main transformer oil level real-time monitoring method based on an ultimate oil temperature equivalence method, and belongs to the technical field of video monitoring and substation automation. The main transformer oil level real-time monitoring method comprises that the oil temperature, oil level actual measurement data of a main transformer device in the last 30 days is obtained and is subjected to linear fitting, and actual measurement data oil temperature-oil level fitted linear function and the oil level value at the oil temperature below 90 DEG C are obtained; by means of the actual measurement data and the oil level value at the oil temperature below 90 DEG C, a 30-day actual measurement data oil level equivalent fitted straight line is obtained, and the equivalent oil level values in 30 days at a set temperature are calculated; time is taken as an independent variable and the equivalent oil level values are taken as the dependent variable to carry out linear fitting, and the time and oil level fitted linear function and the slope are determined; the slope is determined to obtain the oil level state of the main transformer, the user receives the determination result, and the real-time monitoring is completed. According to the invention, the oil temperature-oil level relation is dynamically analyzed by combining the actual situation, the error between the actual oil level value and the equivalent oil level value is reduced, and the case that the result is accurate and reliable is guaranteed.

Description

technical field [0001] The invention belongs to the technical field of video monitoring and substation automation, in particular to a method for real-time monitoring of the oil level of a main transformer based on the equivalent of limit oil temperature. Background technique [0002] Electric energy not only affects the industrial production efficiency of all walks of life, but also affects the quality of people's normal life. It is the core energy for the sustainable development of the current society. After the reform of mechatronics and mechanical automation, the power system plays a more significant role in the process of power resource dispatching, and the transformer plays a key role in the power system, such as step-down and step-down, and oil leakage failure is the most common problem in transformer installations. [0003] Most of the power transformers in our country are oil-immersed transformers. Over the years, transformer oil leakage has occurred from time to tim...

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Problems solved by technology

[0003] Most of the power transformers in our country are oil-immersed transformers. Over the years, transformer oil leakage has occurred from time to time. Serious leakage not only reduces the service life of the transformer, affects the safe and stable operation of the system, but also affects the economic benefits of the society and users. had a serious impact

[0004] At present, the monitoring of the oil level of the main transformer of the substation in the power grid mainly relies on manual monitoring. The operation and maintenance team regularly arranges the operation and maintenance personnel to check and record the status of the main transformer components and instruments. Manual detection methods cannot find the internal reasons of the main transformer equipment. The oil leakage fault caused by the main transformer can only be judged by observing whether there is oil leakage at the connection of each valve of the main transformer, and the oil leakage fault is usually not found in time, resulting in irreparable economic losses

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