| This article introduces Fourier series calculation method and microprocessor control theory into automatic control system of substation, and completes the hardware installation and software design of microprocessor measurement and control system microprocessor protection system and communicanon system. This system is suitable for switch cabinets at 110 kV and below, and can measure various measured electrical variables in real time and accuraiely and realize various protection functions. Flexible operation can be performed by means of operating panels placed in the front of the unit, meanwhile telemetry variables and telesignals can be transferred to site master computer for communication it is of an economical, practical and convenient microprocessor automation system in the substation presently.
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