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Research Of Feeder Terminal Unit Based On DSP

Posted on:2007-12-26Degree:MasterType:Thesis
Country:ChinaCandidate:W ZhangFull Text:PDF
GTID:2132360242961722Subject:Control theory and control engineering
Abstract/Summary:PDF Full Text Request
This dissertation presents the structure and development of Distribution Automation System and the function of Feeder Terminal Unit (FTU), The related techniques and computing equations for FTU are discussed in details,including AC sampling and harmonic analyses. Based on these studies, a scheme of FTU is given.In this paper we analyse the function of FTU, including measuring, controlling, rotecting,communication at first and provide the main technical index of the device. Then we confirm the hardware frame structure of the device and systematic scheme of software. On the hardware design we provide the operation principle of the main function module and design content in detail, including Analog Inputing, Digital Inputing and Outputting, Watchdog, GPRS communicating, etc.The design of this equipment based on DSP produced by TI, by using the AC sampling techniques. It is possible for FTU to detect faults in time. The sampling period is tracking the power frequency by using the method of linear interpolation. It ensures the precision of all power net parameters. It calculates all parameters such as root-mean-square uantity, frequency, power factor etc. Moreover, to get a better knowledge of the power supply, Fast Fourier Transform algorithm (FFT) is applied to harmonic analyses. This design use the HPI to share the data of the 2 CPUs. The AT89C52 controls the communication process. It use the XC95144XL (a kind of CPLD) to realize the logic control. We use the DFT algorithm to measure the voltage and current. This algorithm is also used in data filter. Actualize the realtime control on the electric net.
Keywords/Search Tags:Distribution automation, FTU, TMS320VC5416, MAX125, HPI, FFT
PDF Full Text Request
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