Open Access

ARTICLE

Application of Hankel Dynamic Mode Decomposition for Wide Area Monitoring of Subsynchronous Resonance

Lei Wang¹, Tiecheng Li¹, Hui Fan², Xuekai Hu¹, Lin Yang³, Xiaomei Yang^3,*

1 State Grid Hebei Electric Power Research Institute, Shijiazhuang, 050021, China
2 State Grid Hebei Electric Power Company, Shijiazhuang, 050021, China
3 The College of Electrical Engineering, Sichuan University, Chengdu, 610065, China

* Corresponding Author: Xiaomei Yang. Email:

Energy Engineering 2023, 120(4), 851-867. https://doi.org/10.32604/ee.2023.025383

Received 08 July 2022; Accepted 09 October 2022; Issue published 13 February 2023

Abstract

In recent years, subsynchronous resonance (SSR) has frequently occurred in DFIG-connected series-compensated systems. For the analysis and prevention, it is of great importance to achieve wide area monitoring of the incident. This paper presents a Hankel dynamic mode decomposition (DMD) method to identify SSR parameters using synchrophasor data. The basic idea is to employ the DMD technique to explore the subspace of Hankel matrices constructed by synchrophasors. It is analytically demonstrated that the subspace of these Hankel matrices is a combination of fundamental and SSR modes. Therefore, the SSR parameters can be calculated once the modal parameter is extracted. Compared with the existing method, the presented work has better dynamic performances as it requires much less data. Thus, it is more suitable for practical cases in which the SSR characteristics are time-varying. The effectiveness and superiority of the proposed method have been verified by both simulations and field data.

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Keywords

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