关键词: 关键词：机前压力设定值, 负荷速率, 优化

Abstract: Abstract:The definitions of performance indexes of power unit were given. The feasibility to increase the load variation rate of power unit was expounded. The reason of optimization of the pressure setting at inlet of the turbine was analyzed, and the optimization scheme was put forward. Based on guarantee of sliding pressure at all variable range, the pressure setting at inlet of the turbine was optimized, and the balance point was found, at which the stability of the unit pressure can be ensured, and the requirement of the power grid about higher load variation rate can be satisfied too.

Key words: Key words:pressure setting at inlet of turbine, load variation rate, optimization