摘要
There exists a large class of nonlinear systems with uncertainties, such as hydrau- lic turbine governors, whose robust control problem is hard to solve by means of the existing robust control approaches. For this class of systems, this work pre- sents a dynamic extending H∞ controller via both differential geometry and H∞ the- ory. Furthermore, based on differential game theory, it has been verified that the proposed control strategy has robustness in the sense that the disturbance can be attenuated effectively because the L2-gain from the disturbance input to the regu- lation output signal could be reduced to any given level. Thirdly, a robust control strategy for hydraulic turbine governor is designed according to the proposed ex- tending H∞ control method, and has been developed into a real control equipment. Finally the field experiments are carried out which show clearly that the developed control equipment can enhance transient stability of power systems more effec- tively than the conventional controller.
There exists a large class of nonlinear systems with uncertainties,such ashydraulic turbine governors,whose robust control problem is hard to solve by means of the existingrobust control approaches.For this class of systems,this work presents a dynamic extending H_∞controller via both differential geometry and H_∞ theory.Furthermore,based on differential gametheory,it has been verified that the proposed control strategy has robustness in the sense that thedisturbance can be attenuated effectively because the L_2-gain from the disturbance input to theregulation output signal could be reduced to any given level.Thirdly,a robust control strategy forhydraulic turbine governor is designed according to the proposed extending H_∞,control method,andhas been developed into a real control equipment.Finally the field experiments are carried out whichshow clearly that the developed control equipment can enhance transient stability of power systemsmore effectively than the conventional controller.
基金
Supported by the National Natural Science Foundation of China (Grant Nos. 50525721, 50595411)
Chinese State Power Corporation (Grant No. SPKJ008-05)