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中国电机工程学报 2007, 27(13) 18-23 DOI:
ISSN: 0258-8013 CN: 11-2107/TM |
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| 电力系统 |
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一种饱和电力系统稳定器控制效果的判断方法 |
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辛焕海 甘德强 钟德成 邱家驹 |
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浙江大学电气学院 浙江大学电气学院 香港理工大学电机与电子工程系 浙江大学电气工程学院 |
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摘要:
针对饱和线性系统,借助二次型Lyapunov函数,估计稳定域的一个严格子集。同时为了减少保守性,利用矩阵的Schur补性质,将如何选取该二次型Lyapunov函数的问题转化为标准的LMI凸优化问题。将该方法应用于电力系统,提出一种判断饱和PSS控制是否有效的方法。其主要思路是估计出饱和系统的稳定域,通过分析预想扰动的状态量是否位于估计的稳定域内,从而为判断此饱和PSS控制是否能有效镇定预想的扰动提供判据,利用算例验证了方法的有效性。
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关键词:
饱和非线性
电力系统稳定器
线性矩阵不等式
李雅普诺夫函数
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A Method for Determining the Effectiveness of Power System Stabilizer With Saturation Nonlinearity |
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Abstract:
A quadratic Lyapunov function is employed to estimate the stability region of a linear system with saturation nonlinearity. To reduce the conservatism in the estimation, the Schur complements of the matrixes are applied to transform the problem of selecting a suitable quadratic Lyapunov function into a simple convex optimization problem with linear matrix inequality (LMI) constraints. The method of stability region estimation is further applied to power systems with the saturated power system stabilizer (PSS), and a method is introduced to analyze the performance of the saturated controllers by checking whether the expected initial states of a power system resides inside the estimated stability region or not. Simulation tests demonstrate the approach is effective.
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Keywords:
saturation nonlinearity
PSS
linear matrix inequalities
Lyapunov function
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收稿日期 2006-03-01 修回日期 1900-01-01 网络版发布日期 |
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DOI: |
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基金项目:
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通讯作者: 辛焕海 |
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作者简介: |
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作者Email: eexinhh@gmail.com |
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| Copyright by 中国电机工程学报 |