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针对含有可控串联补偿器(TCSC)设备的多机电力系统,研究了TCSC与发电机励磁的最优控制规律。首先,建立了含TCSC的多机电力系统非线性动态模型,该模型具有多输入多输出放射非线性系统的形式。然后,利用非线性系统几何线性化理论中的完全反馈线性化方法,将含TCSC的多机非线性数学模型进行精确线性化得到相应的线性控制系统,根据线性系统的最优控制理论和最优指标,得到反馈最优控制输入,进而得出发电机励磁与TCSC的最优控制规律。两机系统的动态仿真分析表明,该非线性最优控制系统具有很好的鲁棒性,能有效提高电力系统的稳定性。
Aiming at the multi-machine power system with controllable series compensator (TCSC), the optimal control law of TCSC and generator excitation is studied. First of all, a nonlinear dynamic model of multi-machine power system with TCSC is established, which has the form of multi-input multi-output radioactive nonlinear system. Then, by using the complete feedback linearization method in nonlinear system geometric linearization theory, the nonlinear system containing TCSC is linearly linearized to obtain the corresponding linear control system. According to the optimal control theory of linear system and the optimal Index, and get the feedback optimal control input, and then get the optimal control law of generator excitation and TCSC. Dynamic simulation analysis of two-machine system shows that the nonlinear optimal control system has good robustness and can effectively improve the stability of power system.