Design of Coal Quality Disturbance Free System for Coordinated Control System Based on Gain Scheduling
The economic and stable operation was affected seriously by coal quality disturbance for power plants. Based on model analysis, influence of the disturbance can be considered as gain change of control system. Power capability coefficient of coal was constructed to inhibit it. Accuracy of the coefficient was verified by operating data. Then coal quality disturbance free system based on gain scheduling was designed for coordinated control system. Simulation showed that, the strategy improved control quality obviously, and inhibited the coal quality disturbance. Keywords—coordinate control system, coal quality disturbance, energy coefficient of coal quality, gain scheduling
Effects and Policies of the Change of Coal Quality on Coal-fired Boiler
This article introduced the effects on 4×300 MW boiler of Taiyuan First Thermal Power Plant because the type to the coal is not suitable of the design.It analyzed the effects on the boiler because of the change of the coal,introduced the sorts of typical problems because of change of the coal type and offered some effective policies to solve the problems.
De-synchronized generator using a synchronous turbo-generator and a matrix converter
The aim of this paper concerns high speed synchronous generators driven directly by gas or steam turbines. After reminding problematics and interest of variable speed in high power plants the authors present a brief state of the art about the abilities of classical static inverters to adapt variable frequency to grid ones. Considering the lack of practical solutions, they propose a structure based upon an original use of a matrix converter. Its principle is validated through first experimental results.