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Wide-area measurement-based modal decoupling for power system oscillation damping

机译：电力系统振荡阻尼的基于广域测量的模态解耦

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摘要

Inter-area oscillation modes usually fall within the same frequency range of 0.1-1.0 Hz; thus, power oscillation damping (POD) control methods should avoid unnecessary excitation of weakly damped modes. This paper presents a decoupled control strategy to damp inter-area oscillations in the power grid. Pure oscillation mode signals are extracted from wide-area measurements and used as feedback input for POD actuators such as power system stabilizers or high-voltage direct current transmission. The decoupled control strategy is able to increase the damping of the concerned oscillation modes without deteriorating others. This proposed strategy could be implemented independently, or serve as a complement and work along with conventional POD controllers to damp concerned inter-area modes. The proposed method has been tested on a modified MinniWECC system. Extensive results indicate that inter-area oscillations can be successfully and precisely damped using the proposed decoupled strategy.
机译：区域间振荡模式通常落在0.1-1.0 Hz的相同频率范围内。因此，功率振荡阻尼（POD）控制方法应避免不必要地激励弱阻尼模式。本文提出了一种去耦控制策略，以抑制电网中的区域间振荡。从广域测量中提取纯振荡模式信号，并将其用作POD执行器（如电力系统稳定器或高压直流传输）的反馈输入。解耦的控制策略能够增加相关振荡模式的阻尼而不会恶化其他振荡模式。该提议的策略可以独立实施，也可以作为补充并与常规POD控制器一起使用以抑制相关的区域间模式。该方法已在改进的MinniWECC系统上进行了测试。大量结果表明，使用提出的解耦策略可以成功且精确地抑制区域间振荡。

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