Two-Layer Optimization of Regional Integrated Energy System Considering Exergy Efficiency and Multiple Uncertainties

doi:10.11930/j.issn.1004-9649.202404018

Abstract

Abstract:

In order to realize high quality and efficiency utilization of energy while improving the reliability of system energy supply, the concept of exergy is introduced into regional integrated energy system containing a high proportion of renewable energy, and a two-layer optimization method is proposed considering exergy efficiency and multiple uncertainties. Firstly, a multi-energy coupling model of regional integrated energy system is established for exergy and multi-uncertainties analysis. Multi-scene random planning and range optimization methods are adopted to deal with exergy for different characteristics of solar and wind power uncertainty, along with load and energy price fluctuations. Then, a two-layer collaborative optimization model balances system capacity planning and scheduling operations is constructed, with both exergy efficiency and economy as the optimization goal in the upper layer, and the lowest operating cost as the optimization goal in the lower layer. Finally, an industrial park is selected for example analysis to verify the effectiveness of the proposed method in this paper. Compared with other uncertain factors, the fluctuation of electrical load has a greater impact on the economy and exergy efficiency of the system.

Key words: regional integrated energy system, renewable energy, exergy efficiency, multiple uncertainties, two-layer optimization

Ling LU, Tao YUAN, Bo YANG, Xin LI, Yang LU, Qiuping PU, Xin ZHANG. Two-Layer Optimization of Regional Integrated Energy System Considering Exergy Efficiency and Multiple Uncertainties[J]. Electric Power, 2025, 58(1): 128-140.

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URL: https://www.electricpower.com.cn/EN/10.11930/j.issn.1004-9649.202404018

https://www.electricpower.com.cn/EN/Y2025/V58/I1/128

Figures/Tables 20

References 28

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能量类型		品质系数
电能		1.00
天然气		0.51
热能		0.10~0.20
冷能		0.05~0.08

能量类型		品质系数
电能		1.00
天然气		0.51
热能		0.10~0.20
冷能		0.05~0.08

时段	电价/ (元·(kW·h)^–1)	天然气价格/ (元·m^–3)	碳税/ (元·(kgCO₂)^–1)
10:00—14:00	1.040	2.37	0.23
19:00—22:00	1.040
00:00—07:00	0.315
23:00—24:00	0.315
其他	0.630

时段	电价/ (元·(kW·h)^–1)	天然气价格/ (元·m^–3)	碳税/ (元·(kgCO₂)^–1)
10:00—14:00	1.040	2.37	0.23
19:00—22:00	1.040
00:00—07:00	0.315
23:00—24:00	0.315
其他	0.630

设备	能源转换效率	㶲效率	单位成本/ (元·(kW)^–1)	运维成本/ (元·(kW·h)^–1)
WT	0.32	1.000	8000	0.030
PV	0.16	1.000	5000	0.030
STC	0.60	1.000	5600	0.030
CCHP	0.88	0.745	7000	0.300
PtG	0.60	0.306	5500	0.150
EB	0.95	0.190	1000	0.032
GB	0.85	0.283	850	0.020
AC	0.85	0.295	1200	0.042
EC	3.00	0.245	1470	0.077