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Damped Nyquist Plot for a pole placement design of power system stabilizers

机译:阻尼Nyquist图用于电力系统稳定器的极点布置设计

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This paper proposes a new frequency domain control design method through the use of a modified Nyquist diagram with an embedded partial pole-placement capability. The proposed Damped Nyquist Plot (DNP) method evaluates the open loop transfer function (OLTF) along a line of constant damping ratio to provide a graphical tool to design power system stabilizers (PSS). The graphical tool shows how the closed loop poles move around this damping ratio line for different choices of PSS parameters, all of them placing a selected pair of complex-conjugate poles at the same desired point in the complex plane. New formulas are developed to determine the exact PSS parameters that promote the several possibilities of partial pole placement considering the parameter ranges used in tuning practice. These formulas can also be used for phase compensation of conventional methods of PSS design, such as GEP or Residue Angle Compensation. Multiple PSSs can be tuned using the DNP method sequentially. The proposed method is applied to two stabilization examples, the first of tutorial nature and the second is the large actual Brazilian Interconnected Power System. (C) 2018 Elsevier B.V. All rights reserved.
机译:本文提出了一种新的频域控制设计方法,该方法通过使用带有嵌入式部分极点放置功能的改进的Nyquist图来实现。拟议的阻尼奈奎斯特图(DNP)方法沿恒定阻尼比的一条线评估开环传递函数(OLTF),以提供用于设计电力系统稳定器(PSS)的图形工具。图形工具显示了对于不同的PSS参数选择,闭环磁极如何围绕该阻尼比线移动,它们都将一对选定的复共轭共轭磁极放置在复平面中的相同期望点上。考虑到调整实践中使用的参数范围,开发了新公式来确定确切的PSS参数,从而提高了部分磁极放置的几种可能性。这些公式也可用于PSS设计的常规方法(例如GEP或残角补偿)的相位补偿。可以使用DNP方法依次调整多个PSS。所提出的方法应用于两个稳定示例,第一个具有教程性质,第二个是大型的实际巴西互连电源系统。 (C)2018 Elsevier B.V.保留所有权利。

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