Research on hierarchical optimization scheduling of multi-energy complementary adaptive variable step-size SMPC for energy island

doi:10.3969/j.issn.2097-0706.2026.01.003

Abstract

Abstract:

Based on a multi-objective hierarchical optimization method， a hierarchical collaborative optimization model for the multi-energy complementary system in an offshore energy island was constructed， considering both system balance and economic efficiency of scheduling. To address the impact of the volatility and randomness of wind and solar energy on the scheduling of the offshore energy island system， the stochastic model predictive control （SMPC） method was adopted to optimize the scheduling of the offshore energy island. A scheduling method of adaptive variable step-size SMPC was proposed. In the rolling optimization link of SMPC， the real-time scheduling deviation degree was tracked through a deviation reference coefficient using the proposed method， and the rolling optimization step-size was adjusted accordingly. This addressed the problems of scheduling accuracy loss and local optimization in the rolling optimization phase of the traditional SMPC scheduling method， thereby balancing scheduling accuracy and globality. The simulation results show that this method can effectively improve the scheduling accuracy and shorten calculation time.

Key words: hierarchical optimization, offshore energy island, multi-energy complementary system, adaptive variable step-size, stochastic model predictive control

CLC Number:

TK89

LI Kuo, TANG Yang, LIU Botao, HUANG Haocheng, SHAO Xianjie, YIN Gaojun, WEI Shangshang. Research on hierarchical optimization scheduling of multi-energy complementary adaptive variable step-size SMPC for energy island[J]. Integrated Intelligent Energy, 2026, 48(1): 23-33.

Figures/Tables 12

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典型日	MPC	SMPC	自适应变步长SMPC
4月15日（春）	0.92	0.28	0.25
7月15日（夏）	0.55	0.31	0.29
10月15日（秋）	0.89	0.24	0.21
1月15日（冬）	0.62	0.24	0.24

调度方法	4月15日（春）	7月15日（夏）	10月15日（秋）	1月15日（冬）	平均用时
MPC	156.42	142.92	127.26	156.16	145.69
SMPC	248.67	255.09	251.19	255.84	252.69
自适应变步长SMPC	227.23	237.17	242.08	239.11	236.39