ONLINE MONITORING METHOD FOR KEY FREQUENCY REGULATION PARAMETERS OF RENEWABLE ENERGY POWER SYSTEM

Qi Xiaoguang; Wang Ning; Qin Liangdong; Feng Xichun; Xu Tianfeng; Zhu Tiantong

doi:10.19912/j.0254-0096.tynxb.2024-1513

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Acta Energiae Solaris Sinica ›› 2026, Vol. 47 ›› Issue (1) : 244-252. DOI: 10.19912/j.0254-0096.tynxb.2024-1513

ONLINE MONITORING METHOD FOR KEY FREQUENCY REGULATION PARAMETERS OF RENEWABLE ENERGY POWER SYSTEM

Qi Xiaoguang, Wang Ning, Qin Liangdong, Feng Xichun, Xu Tianfeng, Zhu Tiantong

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Abstract

This paper proposes an online monitoring method for key frequency regulation parameters of renewable energy power systems. It clarifies the required measurement signals for online monitoring and outlines the methods and processes for monitoring the overall equivalent inertia time constant and the system's droop coefficient. The applicability of the method is validated through simulation examples conducted under various penetration levels in both traditional and renewable energy power systems. The simulation results demonstrate that the proposed method can accurately monitor the key frequency regulation parameters of renewable energy power systems, with the equivalent inertia time constant monitoring error below 2% and the droop coefficient monitoring error below 4.5%. Furthermore, this method can compute the system’s equivalent inertia time constant within 0.4 seconds after a disturbance and determine the system’s droop coefficient once it stabilizes. Notably, the method shows excellent adaptability and stability, particularly in high-penetration renewable energy high permeability systems.

Key words

frequency response / condition monitoring / frequency control / inertia control / primary frequency control / equivalent inertia time constant / adjustment rate

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Qi Xiaoguang, Wang Ning, Qin Liangdong, Feng Xichun, Xu Tianfeng, Zhu Tiantong. ONLINE MONITORING METHOD FOR KEY FREQUENCY REGULATION PARAMETERS OF RENEWABLE ENERGY POWER SYSTEM[J]. Acta Energiae Solaris Sinica. 2026, 47(1): 244-252 https://doi.org/10.19912/j.0254-0096.tynxb.2024-1513

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