Coordination of torsional controller for parallel turbine-generator system operation

This paper proposes shaft torque observer and coordinated controllers for in-house type parallel generation system, and discusses about relation between observation signals of torsional torque observer and accuracy of estimated values. Firstly, this paper proposes shaft torque observer for rotating type generation system, and discusses about relation between observation signals and accuracy of the estimated values. Secondly, The torque estimated by the observer is fed back into the excitation voltage in order to reduce to the torsional torque. An effect of interaction between torsional dynamics of two closely coupled units is investigated.