汽门非线性控制在电力单机无穷大系统应用研究

Research of Nonlinear Valve Control of Turbine Generation Units in Single-Mac hine and Infinite Power System

为了改进汽轮发电机组汽门的控制方式,建立了汽轮发电机组汽门调节系统的非线性模型.运用微分几何控制理论中的状态反馈精确线性化设计方法,得到了汽轮发电机组汽门非线性控制规律,在此基础上进行电力系统单机无穷大系统动态计算机仿真的研究.仿真结果表明汽门非线性控制可以明显提高电力系统的暂态稳定性,改善电力系统的动态品质,对电力系统中汽轮发电机失步后的再同步有明显的控制效果.

In order to improve the control model for valve of t urbine-generation units, this paper presents a nonlinear control model for valv e of turbine-generation units. According to state-feedback accurate linear d e sign model of the differential geometric control theory, the nonlinear valve con trol rule for the turbine-generation units is obtained, and the control strateg y is s imulated on computer for a single-machine and infinite power system. The result s hows that the nonlinear valve control can obviously advance the transient state of stability of power system, improve dynamic quality of power system, and is very effective for the resynchronization of a turbine-generation units when i t goes out of order in the power system. 