【摘要】 提出了一种在互联电力系统中考虑信息结构约束条件下协调设计非线性优化励磁控制的方法。基于控制信息结构概念和线性二次型性能指标,将控制设计问题转化为求解扩展Levine-Athans方程组,采用直接迭代算法,可快速、精确地求出增益矩阵,进而得到机组端电压、角频率和功率偏差反馈的非线性优化励磁控制。将该方法应用于一个两区域四机电力系统,数字仿真结果表明:得到的控制策略较传统的AVR/PSS增强了系统的人工阻尼、暂态稳定性和区间传输能力。更多还原

【Abstract】 This paper proposes an approach to coordinated design of nonlinear optimal excitation control under informa-tion structure constraint in interconnected power systems. Based on the concept of control information structure and employment of Linear Quadratic (LQ) performance index, the control problem is formulated into one of solving the extended Levine-Athans equations. With the direct iteration algorithm, accurate and quick solution can be found, and thus nonlinear optimal excitation controllers are simultaneously synthesized, which are composed of feedbacks of terminal voltage, rotor speed and active power. Case study is fulfilled on a two-area four-machine interconnected power system. Digital simulation verifies the effectiveness and advantage over separately design-ed AVR/PSS control in improving oscillation damping ability, system transient stability and across-area transfer capability.更多还原