Locating Forced Oscillation Source Using Granger Causality Analysis and Delay Estimation

Luan, Moude; Li, Shangyuan; Gan, Deqiang

doi:10.1109/igbsg.2019.8886340

Cited by 1 publication

(1 citation statement)

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“…In view of the above characteristics, several measures have been proposed for forced oscillation suppression. Although the source of forced oscillation disturbances can be identified and removed through online system operating data [5,6], the wavelet ridge technique [7] and spectral Granger causality analysis [8], the current forced oscillation identification technology is still in the development stage without guaranteed accuracy and timeliness. In addition, a power system stabilizer (PSS) [9] and some flexible AC transmission system (FACTS) equipment, such as a static synchronous series compensator (SSSC) [10], and static synchronous compensator (STATCOM) [11] are recommended for system damping.…”

Section: Introductionmentioning

confidence: 99%

Damping forced oscillations in power system via interline power flow controller with additional repetitive control

Feng¹,

Wang³

et al. 2021

Prot Control Mod Power Syst

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With the continuous expansion of power systems and the application of power electronic equipment, forced oscillation has become one of the key problems in terms of system safety and stability. In this paper, an interline power flow controller (IPFC) is used as a power suppression carrier and its mechanism is analyzed using the linearized state-space method to improve the system damping ratio. It is shown that although the IPFC can suppress forced oscillation with well-designed parameters, its capability of improving the system damping ratio is limited. Thus, combined with the repetitive control method, an additional repetitive controller (ARC) is proposed to further dampen the forced power oscillation. The ARC control scheme is characterized by outstanding tracking performance to a system steady reference value, and the main IPFC controller with the ARC can provide higher damping, and further reduce the amplitude of oscillations to zero compared with a supplementary damping controller (SDC). Simulation results show that the IPFC with an ARC can not only greatly reduce the oscillation amplitude, but also actively output the compensation power according to the reference value of the ARC tracking system.

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