Development Of Automatic Quasi-synchronized Device For Microprocessor Based On PC/104

The synchronism parallel operation of synchronous generator is a basic operationused in the power system commonly. The synchronism parallel operation needs to meetthe requirement of quickness, accuracy and safety. At present, many research institutes andmanufacturing companies on domestic scales and abroad are striving to research on thesynchronism devices. However, most of the synchronism devices are packaged, so that theoperation can not be observed directly, which brings so much inconvenience to thelearners and researchers. In order to facilitate the major college laboratories, it is necessaryto develop a experimental device to show the operation visually.This paper mainly introduces the Quasi-Synchronism parallel operation in the powersystem as well as its exploitation and research. The multi-functional AutomaticQuasi-Synchronized Device for Microprocessor is designed based on the PC/104motherboard and PM511P multi-functional data acquisition board of S104/sx-340which isdesigned by SeaTech. After learning the principle of Quasi-Synchronism, this papercalculated the three elements of synchronism, such as frequency difference, voltagedifference and phase angle difference, using the Recursive Fourier Algorithm. This paperalso optimizes and improves the algorithm by using the Adaptive Adjustment of SamplingInterval Technique. It is also designed and studied about the architecture of its hardwareand software. In addition, It is considered that the experimental device’s hardware shouldbe economic and practical; besides, it should have a high level of system integration andsimple structure relatively. This paper adopt the concept of modular design, including thepower module, PC/104board, PM511P data acquisition board, analog input andinteractive modules to make the synchronizers work. In the aspect of software, it isprogrammed by using the C programming language in Turbo C2.0. It is simple and easy tooperate. In addition, control module and human-machine interface has been designed toachieve various functions, and the teaching experiment is designed combined withexcitation regulator and speed regulating device in the existing laboratory.The experimental device can operate reliably, switch-on accurately, detect internal fault automatically, display the information abundantly, to be maintained conveniently andso on, so it meets the requirements of various universities and colleges in the teachingexperiment.