RESEARCH ON OPTIMIZATION OF PRIMARY FREQUENCY REGULATION BASED ON FREQUENCY NADIR PREDICTZON AFTER POWER SYSTEM DISTURBANCES

Zhang Guobin; Shen Yeyu; Huo Hongyan; Guo Ruijun; Niu Yuguang; Liu Shuangcui

doi:10.19912/j.0254-0096.tynxb.2023-2099

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Acta Energiae Solaris Sinica ›› 2025, Vol. 46 ›› Issue (5) : 89-98. DOI: 10.19912/j.0254-0096.tynxb.2023-2099

RESEARCH ON OPTIMIZATION OF PRIMARY FREQUENCY REGULATION BASED ON FREQUENCY NADIR PREDICTZON AFTER POWER SYSTEM DISTURBANCES

Zhang Guobin¹, Shen Yeyu², Huo Hongyan¹, Guo Ruijun², Niu Yuguang¹, Liu Shuangcui³

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Abstract

To improve the frequency stability of the new power system, this paper proposes a primary frequency regulation optimization method based on predicting the frequency nadir after system disturbances. Firstly, to accurately predict the frequency variation characteristics of the power system after disturbance, the mechanism of frequency deviation was analyzed, and relevant influencing variables of power imbalance events such as generator tripping, were selected. Combined with Extreme Learning Machine （ELM）, an ELM neural network-based frequency nadir prediction model was established, where the Dung Beetle Algorithm（DBO） was employed to optimize the input weights and hidden layer thresholds of the ELM, reducing the instability due to randomly generated parameters. Then, a primary frequency regulation optimization strategy based on predicted signals was designed. Simulation experiments were conducted on IEEE 39-bus system, and the results showed that the DBO-ELM algorithm has faster calculation speed, stronger generalization ability, and higher prediction accuracy when predicting the lowest point of frequency. The proposed primary frequency regulation optimization strategy effectively improved frequency stability and provided solutions for large frequency deviation disturbances in power systems.

Key words

predicition model / power systems / primary frequency regulation / extreme learning machine / dung beetle optimizer / frequency nadir

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Zhang Guobin, Shen Yeyu, Huo Hongyan, Guo Ruijun, Niu Yuguang, Liu Shuangcui. RESEARCH ON OPTIMIZATION OF PRIMARY FREQUENCY REGULATION BASED ON FREQUENCY NADIR PREDICTZON AFTER POWER SYSTEM DISTURBANCES[J]. Acta Energiae Solaris Sinica. 2025, 46(5): 89-98 https://doi.org/10.19912/j.0254-0096.tynxb.2023-2099

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