The first chapter brings the definition of a small hydropower plant and its location that has to satisfy the conditions of construction and ecological standards. With environment barriers we try to emphasize the problems of construction. Asynchronous and synchronous generator, are also described, as well as the electro and hardware equipment. The second chapter discusses the main subject – the operating system of a small hydropowerplant Skomarje. We describe the system in general, the process of powerplant start up, manual and automatic operating. In this part of the thesis, we get to the problem of level control. Control system of a small hydropowerplant is the key function of the process so it can work independently from the enviroment. We also describe operation of the older controler and the new one with which we upgraded it. We also upgraded the supervisory system SCADA, whose preformance is also presented.
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