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同步发电机能量稳定励磁控制

, PP. 81-87

Keywords: 同步发电机,励磁控制,端电压调节,能量稳定控制,大范围渐近稳定性

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Abstract:

针对同步发电机励磁控制问题,提出能量稳定控制方法。用端电压、角速度和有功功率构建Lyapunov函数,将系统的稳定性与其动、静态性能联系起来。为确保Lyapunov函数导数的负定性,主动构建完全能控系统,并通过非线性励磁反馈,设计系统微分运动轨迹。在此基础上,运用矩阵理论、极点配置原理和Lyapunov定理,判定Lyapunov函数导数的负定性,确保系统在平衡点具有大范围渐近稳定性。由于端电压偏差与系统的大范围渐近稳定性相辅相成,因此提出的非线性励磁控制方法能在确保同步发电机端电压调节特性的同时,使系统具有大范围渐近稳定性。最后,进行数值仿真,与已有控制方案进行比较,证实了所提方法的有效性。

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