Programmable mMicroprocessors in Local Control of Hydro Power Plants

by Leif G. Anderson, ASEA Generation AB, Vasteras, Sweden,

Document Type: Proceeding Paper

Part of: Water Power '87


The main purpose of the control equipment is to provide the generator with means for operation of the power station equipment. There is a need for status information on the generating unit systems. Start and stop sequences must be executed, the active and reactive output must be controlled and dangerous operating conditions must be avoided. Modern control equipment provides many convenient aids, which ensure both easy and accurate operation of the plant. Microcomputer technology has in recent years come to dominate electric control circuits. Although relays and some traditional semiconductors are still used, more and more functions will be performed by programmable microprocessors. These new systems have several advantages. The reduction of costs and space requirements will be combined with the capability of executing more functions of the kind that formerly had only been possible in large load dispatching centres. Local intelligence for instance, can predict water flow and load requirement, thus keeping the water head at its maximum possible level, ensuring maximum power production economy. Another example is automatic load distribution between the generators to give improved total efficiency of the plant.

Subject Headings: Load distribution | Load factors | Hydro power | Computer programming | Control systems | Water flow | Maximum loads | Power plants

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