Sensitivity and optimal control studies of power systems

• Main Author: Lee, Yui Bor
• Published: University of Bath 1975
• Subjects: 003.5
• Online Access: https://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.462995

Sensitivity theory and optimal control theory have been applied to the analysis and optimisation of the performance of a single machine power system. System sensitivity was used as a design criterion and as a method of optimisation and analysis. Both dynamic sensitivity and eigenvalue sensitivity have been considered. Systematic methods have been developed for the optimisation of the performance and sensitivity of linear and non-linear dynamic systems using sensitivity functions. These methods have been successfully applied to optimise the transient performance of conventional synchronous generators employing suboptimal excitation control and integrated excitation and steam-flow control. It was found that the suboptimal controls derived furnished substantial improvement in transient performance of the system under a wide range of operating conditions and varying parameters, A. comprehensive sensitivity analysis of the conventional generator has been mode which provides valuable insight into the sensitivity and dynamic characteristics of the system and forms a complementary study to the optimisation studies. The optimal and suboptimal excitation control of a dual-excited synchronous generator has also been investigated and it was found that substantial overall improvement were achieved by the optimal and suboptimal controls in the generator performance both under small and large disturbance conditions.