| With the development of national economy and improvement of the people's living standards, the continuous improvement of the whole social information and electrization, power supply, as the foundation of national economy, its security and quality become more and more important. So the national electric administrative department requires the electric equipment integration, totalization and automatization in high speed. It is hope to manage and change the distribution system with the scientific means. It is also the new trend in which the electric industry develops. Substation automation is a certain trend to realize the automation of the power system. It is the comprehensive advanced technology which contains modern electronic technology, communication technology, network technology and graphics technology. It can not only keep watch on but also protect and control the distribution system in the case of normal and accident. Substation automation combined with management of the power supply enterprise can improve the safe operation level of grid greatly and better power supply quality, meanwhile, decrease waste and save energy. In order to meet the basic need of reliability for power system, the substation's measurement and control system is introduced according to the technological demands and trend of substation automation, main circuit, control system and control software are designed. The single chip-microcomputer M37753 is chosen as the core of the measurement and control system which achieves intelligent control over the substation. The system can measure current and voltage in the substation's output lines and calculate corresponding electrical parameters, sample digital signals on the switches and control its on-off by actual demand. The effective interference resistance means are designed for main circuit and software. The system runs accurately under relative conditions and achieves successfully.
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