| This thesis mainly discusses the measurement of dynamic changes frequency for process of synchronous generator proposed a multi-point sampling; changing frequency measurement.Starting from the synchronous generator output characteristics, as well as operating characteristics. The measurement of frequency in starting process is down to the basic amount, such as voltage, current, equivalent measurements. This paper explored in-depth study and design the method of multi-point sampling, changing frequency measurement, this method has real-time feature and start from theoretical calculation. Analysis the frequency measurement method of design ideas and principles, from the data table and start sampling method designed to discuss the frequency detection and elimination of error of sampling error solution, meanwhile, the solution of the initial phase of the voltage in different locations and sampling error have been analyzed. Frequency detection program to eliminate the impact of data table amplitude reference value of a detailed mathematical derivation has been applied.The frequency measurement are simulated and analyzed under the simulation environment of MATLAB/SIMULINK in this article. The problem of frequency measurement method are discussed and compared. Frequency detecting changes in amplitude, frequency changing voltage waveform is verified feasibly and can be applied to start the process of synchronous generator dynamic frequency measurement. |
PDF Full Text Request