The method of maintaining the speed of the turbine is constant irrespective of variation of the load on the turbine known as governing of turbines. The governors regulate the supply of steam to the turbine in such a way that the speed of the turbine is maintained as far as possible a constant under varying load conditions. The principal methods of steam turbine governing are as follows :
(i) Throttle Governing
(ii) Nozzle Control Governing
(iii) By- pass governing
(iv) Combination Of throttle and nozzle governing or throttle and by - passing governing.
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