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Large unit fault recording and fault diagnosis of

Author: HuangFei
Tutor: WangGuanJie
School: Chongqing University
Course: Electrical Engineering
Keywords: Disturbance Troubleshooting Simultaneous Sampling
CLC: TM764
Type: Master's thesis
Year: 2002
Downloads: 106
Quote: 1
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Abstract


Papers based on failure characteristics of large units , combined with the relevant national standards and department standard , developed a fault recorder on the basic requirements of large units , on the record wave volume, recording time and other important technical indicators were specified. Developed a large unit fault recorder hardware system architecture - data sampling and analysis of machine processor and secondary structure . Developed a 16 16 -channel simultaneous sampling speed A / D card , solve the data acquisition precision, high speed problems. Demonstrates the large unit fault recorder start criterion algorithm, due to recorded data contains harmonic components , various algorithms based on a single frequency can not be used to select a full- cycle Fourier algorithm, but the calculation is too large , the proposed full- frequency Fourier recursive algorithm , high precision, small amount of calculation . Detailed study of the generator stator winding inter-turn short circuit and electrical phase relationship between theoretical and practical calculation method . Using the generator inductance and mutual inductance resistance analysis and calculation of resistance and negative self-inductance inductance calculation is very complicated , we use the practical use of the generator parameters commonly calculated as the theoretical basis for fault diagnosis . On this basis , the first time with recorded data on the stator winding inter-turn short-circuit and phase short circuit fault diagnosis, to determine the point of failure in the stator winding phase types and turns α, innovative , practical value . Wave recording device prototype power plant in Guizhou Jinsha invested 125,000 watt unit production run , to good effect.

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CLC: > Industrial Technology > Electrotechnical > Transmission and distribution engineering, power network and power system > Power system automation > Distant measurement and remote control
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