What are the hardware characteristics and deformation analysis methods of the power transformer winding deformation tester?
1. Hardware features-The measuring device adopts the standard serial port of a general portable computer to communicate with the measuring system, which is more flexible and flexible for users. -The output power driving part adopts special circuit matching to ensure that there is no reflected voltage on the two measurement lines used and the inlet capacitance of the transformer port can be reflected on the test map. -Adopt dedicated measurement 1. Hardware features-The measurement device adopts the form of communication connection between the standard serial port of a general portable computer and the measurement system, which is more flexible and flexible for users. -The output power driving part adopts special circuit matching to ensure that there is no reflected voltage on the two measurement lines used and the inlet capacitance of the transformer port can be reflected on the test map. -Using a dedicated measuring head, with joint fault tolerance and measurement lead fault tolerance, to ensure the consistency of measurement. -The tester has a frequency self-calibration function. -The measurement time is 2 minutes per phase coil. -The number of measurement points for each phase winding is 2000 points, among which the low-frequency part is greatly encrypted in order to find the fatal overall deformation of the transformer. -Using a variety of anti-interference technologies to effectively suppress the noise level. -The measurement analysis software runs on the WINDOWS system software platform, with a friendly interface and easy operation. In the software, there are online operation prompts and a full set of measurement and analysis methods introduction. -In the word processing software WORD, you can directly insert and edit the measurement data graph of the BRTC-Ⅱ tester, which is convenient for the generation of test reports. -It has the calculation function of the mathematical correlation coefficient of the graph curve. -Support various color and black-and-white printers to directly print the displayed graphs. -Equipped with a 2000V isolated power supply to ensure the safety of the equipment during measurement in the substation. Two: Deformation analysis method Deformation analysis method is the focus and characteristic of HTBX-H tester. According to the transformer winding coil is mainly inductance, the inductance part is abnormal, the transformer cannot operate normally; and taking into account the characteristics of insulation to the ground, the analysis method proposed by the HTBX-H tester focuses on the low frequency band, focusing on the analysis of endangering operational safety The coil is deformed as a whole, and faults such as local deformation and lead displacement are analyzed at the same time. This analysis method has strong pertinence and operability. The deformation analysis method is realized through the technical training of actual operators and operation management personnel on site, and mainly includes the following contents:-The basic principle of transformer winding deformation detection. Equivalent circuit. -The reaction form of the coil deformation on the spectrogram. -The relationship between typical deformation and frequency spectrum change, such as overall displacement, overall coil compression and extension, local compression and extension, short circuit between turns, etc. -Analyze deformation types, deformation area estimation and deformation degree estimation methods. -The difference between manufacturing process and deformation. -Introduction of the criteria for determining whether the transformer can continue to be put into operation.
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