Automated controlling system for protection of hydroelectrical power station with butterfly valves on power channel

摘要

Each hydro-power station is equipped with a protection system, that intervenes in the case of a breakdown of the equipments, to protect the personnel and the aggregates of the power plant. One of the base components of a hydro-power station is the forced pipeline, which allows admission of water from the reservoir to the turbine-generator groups. For the protection of the forced pipeline one or two special valves-butterfly valves-are installed, that have the purpose of allowing the admission of water to the groups and to cut-of the water flow in special conditions. In the present paper we present the solution used for a power plant fitted with two butterfly valves on the forced pipeline and the implemented control system. The butterfly valves and the supervisory, control and protective system are housed in a special chamber “Valve''s house”. The role of the system is to allow the waterflow to the generators, by keeping those valves opened (0–5 degrees) and also to avoid the flood of underground power station in the eventuality of: destruction of power channel; destruction of diversion channel or any major malfunction to the hydro-generators groups.