Load frequency control of renewable energy power systems considering demand response of air conditioning clusters based on fractional-order integral sliding mode

doi:10.3969/j.issn.2097-0706.2024.10.003

Abstract

Abstract:

With the extensive integration of renewable energy sources and the continuous increase in load demand， the pressure on the safe operation of power systems significantly intensifies， making frequency control in renewable energy power systems a prominent research area. This study addressed the issue of substantial frequency deviation caused by random disturbances in source-load interactions within renewable energy power systems by proposing a fractional-order integral sliding mode load frequency control strategy that incorporated air conditioning cluster demand response （DR）. First， an interconnected power system model was established， including wind turbines and air conditioning cluster DR. Second， a fractional-order integral sliding mode algorithm was used to control the generator's speed regulator， aiming to minimize frequency deviation， suppress oscillatory behavior， and enhance the robustness of the power system. Furthermore， DR and wind turbines were engaged as auxiliary devices to further mitigate frequency deviations. Finally， three different operational scenarios were designed， and simulations were conducted using Matlab/Simulink. The simulation results showed that the proposed control strategy effectively reduced frequency deviations in the renewable energy power systems， ensuring stable system operation.

Key words: renewable power system, demand response, fractional-order integral algorithm, sliding mode controller, load frequency control

CLC Number:

TK01：TM73

JIANG Jian, XU Fengliang, LI Xiaoming, SUN Jianchao, JIANG Huahua, ZHANG Jiaxin, MA Siyuan, YANG Zishuai. Load frequency control of renewable energy power systems considering demand response of air conditioning clusters based on fractional-order integral sliding mode[J]. Integrated Intelligent Energy, 2024, 46(10): 18-25.

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参数	数值	参数	数值	参数	数值
K_p_i/s	120	T_p_i	15	r	0.49
T_ch1/s	0.072 8	T_g1/s	0.273	K_ε1	0.3
T_ch2/s	0.072 8	T_g2/s	0.273	K_ε2	0.25
B₁	0.425	B₂	0.347	T_tie‑_ij	0.8
A_r	14	J/(kg·m²)	62 993	ρ/(kg·m^-³)	1.225
U/V	230.94	R₁/Ω	0.003 97	R₂/Ω	0.004 43
X₁/Ω	0.003 76	X₂/Ω	0.053	T_β/s	0.2
H₁	10	H₂	8	D₁	0.6
D₂	0.8