A method for detecting temperature and position of hot spots in windings of dry-type transformers
A technology of dry-type transformers and detection methods, which is applied in the direction of instruments, measuring electronics, and measuring devices, can solve problems such as inability to identify hotspot spatial location information, poor accuracy of temperature measurement results, and complicated temperature measurement processes, so as to avoid major power grid operations Effects of accidents, low implementation cost, and simple technical process
Active Publication Date: 2018-07-03
NORTH CHINA ELECTRIC POWER UNIV (BAODING)
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Problems solved by technology
[0004] Aiming at the problems of complex temperature measurement process, poor accuracy of temperature measurement results and inability to identify hot spot spatial position information in the temperature measurement of dry-type transformer windings in the prior art, the present invention provides a temperature measurement method for hot spots in dry-type transformer windings. and position detection method
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[0025] according to figure 2 Build a temperature and position detection device for hot spots in the winding of a dry-type transformer, which includes an S10-1 infrared sensor U1, a drive unit, a data acquisition unit, an industrial computer and a 24V DC voltage source. The driving unit includes LM2575 switching voltage regulator U2 and the matching circuit of the voltage regulator, and the matching circuit of the voltage regulator includes a potentiometer RP, an inductor L1, capacitors C1-C2 and a diode T1. The capacitor C2 is connected between the VIN terminal of the voltage regulator U2 and the ground, the diode T1 is reversely connected between the OUT terminal of the voltage regulator U2 and the ground, and the inductor L1 and the capacitor C1 are connected in series to the OUT terminal of the voltage regulator U2 and between. The series node of the inductor L1 and the capacitor C1 is the output end of the high-precision driving voltage signal. Potentiometer RP is conne...
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The invention relates to the technical field of working condition supervisory control of a dry transformer winding, and particularly to a method for detecting a temperature and a position of a hotspot in a dry transformer winding. Aiming at the problems of complex temperature measuring process, relatively poor accuracy of the temperature measuring result and incapability of identifying space position information of the hotspot existing in the temperature measurement of the dry transformer winding in the prior art, the invention provides the method for detecting the temperature and the position of the hotspot in the dry transformer winding. The method comprises the steps of: establishing and resolving an infrared thermal radiation model; obtaining accurate real-time temperature information and real-time space position information of a heating part of a low-voltage winding by utilizing an iterative algorithm to realize real-time detection. The method for detecting the temperature and the position of the hotspot in the dry transformer winding is good for discovering abnormality and fault of the dry transformer in time, and serious electric grid operation accidents are avoided.
Description
technical field [0001] The invention relates to the technical field of monitoring working conditions of dry-type transformer windings, in particular to a temperature and position detection method for hot spots in dry-type transformer windings. Background technique [0002] With the development of smart grid, the power system puts forward higher requirements for the operation safety of electrical equipment. As the core component of the power system, the transformer plays a vital role in ensuring the safe operation of the power grid. Compared with traditional oil-immersed transformers, dry-type transformers have certain advantages in terms of fire prevention, environmental protection, land occupation, and energy saving. With the advancement of urbanization, the deepening of urban-rural integration construction and the development of living quarters, the investment and application of dry-type transformers are becoming more and more common, and it is very important to ensure th...
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IPC IPC(8): G01R31/06G01D21/02G06F19/00
Inventor 王永强张晓霞欧阳宝龙
Owner NORTH CHINA ELECTRIC POWER UNIV (BAODING)