Expounds the comprehensive stability controlfor excitation, steam valves and braking resistors is one ofthe most economic and feasible means by which the trans-fering power and stability of generator sets and electricnetwork can be improved, and the control principle,technical actions and their effects as well.

For analyzing the stabilizability of excitation and steam-valve control system of a generator,this paper constructs an extend Hamilton function by using energy-Casimir function based on stabilizability theory of generalized Hamilton system.

On-line valve test results showed that the fault was caused by the little flow through the left-side main steam valve with a block or very small opening.

The possibility of combustion ratio of boiler and control valve of governing system disturbance inducing the variation of .

By means of the relative flow rate ratio coefficient,ratio of pressure and opening degree of a control valve in a 600MW steam turbine,firstly,the relational expression is fitted by Back Propagation(BP)neural networks so as to obtain the mathematical model of control valve.

In view of the excessive temperature difference of turbine cylinder metal during start-up of 60 MW power generator sets in Xicun Power Plant,China,the relation between the opening of oil-driven machines and that of governing valves is analyzed along with the relationship between governing valve opening and cylinder steam flow;thus a solution to the problem is presented.

During the process of steam turbine s control mode transformation,in order to get the governing valve s put-in and put-out characteristic,the governing valve s characteristic equation should be built.

Causes analysis of governing valve fluctuation of steam turbine;