Robust RTSs-based esprit method for low frequency oscillations analysis

• Autorzy: Deng Hanjun , Liu Mouha , Yu Minqi , Xiong Dezhi

Identyfikatory

DOI

10.24425/mms.2024.149707

• Języki publikacji: EN

Abstrakty

EN

Low frequency oscillations (LFOs) threaten the stability of power systems. The estimation of signal parameters via rotational invariant techniques can analyse LFOs with high accuracy only when the model order of the analysed signal is known. This paper proposes a novel model order estimation method for modal analysis of LFOs. The method first builds a singular energy spectrum to inspect whether the measurement data is being polluted by complex interferences (e.g., impulsive noises). Then, a tailored Rauch-Tung-Striebel smoother is utilized to alleviate the impact of complex interferences. Afterwards, the mean value of the singular energies is adopted to determine a rough estimation of the model order of dominant modes in LFOs. Finally, the reconstruction quality indicator of the reconstructed signal is introduced for detecting and correcting overestimation and fake modes. The proposed solution is experimentally evaluated via simulations and field measurement data obtained from the phasor measurement unit installed at a generating station in North America. Results show that the method is accurate, robust, and suitable for field applications.

Słowa kluczowe

EN

low frequency oscillations analysis; impulsive noises; model order estimation; damping ratio estimation; Rauch-Tung-Striebel smoother

• Wydawca: Komitet Metrologii i Aparatury Naukowej PAN
• Czasopismo: Metrology and Measurement Systems
• Rocznik: 2024
• Tom: Vol. 31, nr 3
• Strony: 529--545
• Opis fizyczny: Bibliogr. 35 poz., rys., tab., wykr., wzory

Twórcy

autor

Deng Hanjun

• Hunan State Grid Electric Power Limited Company Power Supply Service Center (Metrology Center), Changsha, China

autor

Liu Mouha

• Hunan State Grid Electric Power Limited Company Power Supply Service Center (Metrology Center), Changsha, China

autor

Yu Minqi

• Hunan State Grid Electric Power Limited Company Power Supply Service Center (Metrology Center), Changsha, China

autor

Xiong Dezhi

• Hunan State Grid Electric Power Limited Company Power Supply Service Center (Metrology Center), Changsha, China

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Uwagi

1. This work was solely supported by the State Grid Corporation of China Headquarters as a science and technology project (Project No. 5400-202323233A-1-1-ZN).

2. Opracowanie rekordu ze środków MNiSW, umowa nr POPUL/SP/0154/2024/02 w ramach programu "Społeczna odpowiedzialność nauki II" - moduł: Popularyzacja nauki (2025).