| Summary: | 碩士 === 長榮大學 === 資訊管理學系(所) === 102 === Frequency is one of the important parameters in power systems, and wide-area frequency measurement is an effective method for observing the dynamic behavior of systems. The study is to design and implement a prototype of wide-area dynamic frequency measurement system. This thesis describes the structure of wide-area dynamic frequency measurement system, including a platform for synchronous voltage sampling and calculation method for the value of frequency method. A System on a programmable chip, GPS receiver and ADC module are used to develop the synchronous voltage sampling platform. And, the voltage samples are transmitted to PC through Internet. The real-time frequency calculation by Discrete Fourier Transform plus post-processing is performed in remote computer. The performance of post-processing methods, including least-squares method (LSE) with linear model, LSE with quadratic model and average method, are compared in this thesis. The results show that only average method makes compliance with requirements of P-class under conditions of steady-state and dynamic signal in the IEEE standard. Finally, the measured values of synchronous frequency in voltage signals from 110V outlet are presented.
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