The voltage stability of a ship's power system is decided by the dynamic characteristic of the synchronous generator voltage regulation system in the ship's power station. The synchronous generator voltage regulation system is a nonlinear control system. In order to analyze the dynamic characteristic of the system, a nonlinear mathematical model of synchronous generator voltage regulation system was built first, a state feedback H∞ voltage regulator was designed on the basis of this. The H∞ control theory was used to design the synchronous generator voltage regulator, which could transform the specifications of the system into a standard H∞ control problem, then a state feedback H∞ voltage control law of the synchronous generator was achieved by solving the Riccati equation. The computer simulation results showed that the state feedback H∞ voltage regulator could improve the dynamic precision of the system and the ability to restrain the load disturbance in case of system model with uncertainty, thus improving the voltage stability of a ship power system.%船舶电力系统电压的稳定性主要取决于船舶电站同步发电机调压系统的响应特性.船舶电站同步发电机调压系统是一个非线性控制系统,为了分析系统的动态特性,首先建立同步发电机调压系统的非线性数学模型,然后以此为基础设计状态反馈H∞调压器.将H∞控制理论应用于同步发电机调压器的设计,把系统的性能要求转化为标准H∞控制问题,通过解Riccati方程,获得了同步发电机状态反馈H∞电压控制律.计算机仿真结果表明,所设计的状态反馈H∞调压器在充分考虑系统模型不确定性的情况下,有效地提高了系统的动态精度和抑制扰动的能力,改善了船舶电力系统电压的稳定性.
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