Open Access

ARTICLE

Hybrid Reactive Power Compensation Strategy Based on SE-Improved SGMD for Wind Power Smoothing

Wenbiao Li^1,2, Shengxuan Sun^3,*, Cheng Liu¹, Yuchi Zhang¹, Yu Qi⁴, Yuhang Li¹
1 School of Electrical Engineering, Northeast Electric Power University, Jilin, 132012, China
2 State Grid Shanxi Electric Power Company, Taiyuan, 030025, China
3 State Grid Jilin Electric Power Co., Ltd. Jilin Power Supply Company, Jilin, 132011, China
4 State Grid Shanxi Electric Power Company Electric Power Research Institute, Taiyuan, 030001, China
* Corresponding Author: Shengxuan Sun. Email:

Energy Engineering https://doi.org/10.32604/ee.2026.075762

Received 07 November 2025; Accepted 26 December 2025; Published online 03 March 2026

Abstract

To address voltage fluctuations caused by high-penetration wind power integration, this paper proposes a hybrid reactive power compensation strategy based on Sample Entropy-improved Symplectic Geometric Mode Decomposition (SE-improved SGMD) for smoothing wind power output. The innovation lies in enhancing SGMD by introducing SE to quantitatively evaluate the complexity of decomposed Symplectic Geometry Components (SGCs). This improvement enables adaptive reconstruction of high-, medium-, and low-frequency components from system unbalanced reactive power, effectively overcoming modal aliasing and subjective parameter dependency inherent in conventional methods like Empirical Mode Decomposition (EMD) and Variational Mode Decomposition (VMD). The reconstructed components are then precisely allocated as reference signals for the rotor-side converter (RSC) of doubly-fed wind turbines, STATCOM, and shunt capacitors according to their respective response characteristics. Furthermore, the required capacities of STATCOM and shunt capacitors are optimized based on the energy ratio of each frequency band and the predetermined reactive capacity of the wind turbine’s RSC. Simulation results under voltage disturbance and short-circuit fault scenarios demonstrate that the SE-improved SGMD strategy not only enhances voltage stability with reduced overshoot and faster recovery but also achieves intensive utilization of dynamic compensation resources (STATCOM), thereby significantly reducing the total cost of the reactive power compensation system needed to meet grid connection standards, confirming its effectiveness and economic superiority.

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Keywords

Reactive power compensation device; symplectic geometric mode decomposition; doubly-fed wind turbines; combined power regulation

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