Hardware Research And Design Of Embedded Control Device Of The Electric Voltage & Frequency

With the development of electric power industry, user ask for better quality of power supply, people put forward a new higher request to the measuring and controling devices of the electric power system.Frequency and electric voltage are the important status parameters.They aren't only the important indicators of electric power quality ,but also the important indicators of electric power system safe operation.Therefore, it demonstrates the significances of researching and designing high performance new control device of the electric voltage frequency for the safe and stable operation of electric power system.Nowadays, it is one of research hot spots in sensitive realm that adopting advanced embedded DSP technique to research and design control device of voltage and frequency. A new control device of voltage and frequency based on streamlined high performance DSP chip of TMS320F2812 and embedded real-time oprating systemμC/OS-Ⅱis developed in this thesis.It is the escalation and integrity to the current like device, which is good to raise the reliability of the system operation.Firstly, the operation principle of UFLS(under-frequency load shedding) and UVLS(under-voltage load shedding) is introduced.Then the thesis analyzes the operation principle and characteristics of control devices of voltage and frequency by conbining the two principles above.After studying embedded real-time oprating systemμC/OS-Ⅱ,the thesis implements to embedμC/OS-Ⅱin high performance DSP chip of TMS320F2812.This thesis emphasizes on the hardware research and design of the device, getting clear construction by adopting modular and structured programming approach.And function part of design project and hardware circuits are given,including CPU module,pretreatment circuit module, sample module ,switching value input/output circuit module,LCD display module, power supply module,memory module and communication module,etc.Finally,the thesis discusses debug method and various anti-jamming measures ,which used in the device.In debugging,how to use laboratory existing instrument equipments to detect each pad of the circuit board,and carry on examination to every module by writing independent test procedure in the meantime,etc. In anti-jamming, analyzing the source of jam , hardware anti-jamming measures and software anti-jamming measures can be used together to raise the device's capacity of resisting disturbance.