The Diagnosis System For The Power Transformer Winding Deformation Which Based On The Method Of Frequency Response

The transformer is the core component of power system equipment. Stable and reliable operation of the transformer in order to ensure the grid is not an accident, the transformer in the power system plays a very important role. Transformers in many cases can lead to winding deformation occurs, for example, reach the destination or the local installation process, inevitably occur impact or impulse to touch; or in the normal operating conditions, the occurrence of a variety of short-circuit, etc. Power transformer transformer winding deformation of one of the most common faults, smooth operation of the power system pose a threat, or even a serious impact. Transformer winding deformation diagnostic system for the timely discovery of the transformer internal fault, avoiding transformer accidents, has very important significance.This article is based diagnosis of transformer winding deformation topics under existing diagnostic methods to improve, studying a possible on-site diagnosis of transformer winding determine whether there is distortion of diagnostic systems, principles, methods, judgments based on respect for the diagnosis of transformer winding deformation of this topic in-depth research and discussion.Firstly, the current domestic and international power transformer winding deformation in the diagnosis of several common methods were studied, and speak several methods to compare the advantages and disadvantages. After establishing the system uses the method of study is the frequency response method, as the subject of the basic method of transformer winding diagnosis. This article uses two single-chip processor as the center of the system, a process used to transfer data and process data; another piece used to achieve signal generation, filtering, signal acquisition and signal control. Injected at one end of the measured transformer winding a stable sine sweep signal. After constantly changing excitation frequency signal corresponding to the excitation-side voltage RMS and RMS voltage side are simultaneously collected, after which the different frequency signals on the excitation side of the rms voltage and the ratio of the rms voltage of the respective side can be measured a power transformer windings frequency response curve; can send this data to the host computer, the host computer can be displayed on the display of the measured appears just that group of frequency response curve, according to the judgment based on the formation of such Frequency response curve analysis, and finally concluded that diagnose the existence of transformer winding deformation.