Low-carbon economic dispatch of integrated energy systems considering load characteristics

doi:10.3969/j.issn.2097-0706.2023.08.009

Abstract

Abstract:

With the continuous advancement of "double carbon" target，to alleviate the contradiction between supply and demand of a power-thermal integrated energy system（IES），and stabilize load fluctuations and reduce carbon emissions，a low-carbon economy dispatch strategy for the IES taking the characteristics of power and heat loads into account is proposed. An energy hub model of the IES can reflect the characteristics of flexible power and heat loads on user side. The objective function aims at minimizing the sum of carbon trading cost and operation cost of the IES. Solved by Cplex solver，the day-ahead operation cost and carbon trading cost of the IES under two scenarios are obtained. According to the simulation results，the reduction of the IES day-ahead operation cost and carbon trading cost made by flexible power and heat loads under carbon trading mechanism is expounded. Flexible loads can lower the IES day-ahead operation cost by smoothing the load curve and diminishing peak-valley difference， so as to alleviate the source-load contradiction and carbon emissions.

Key words: "dual carbon"target, integrated energy system, low-carbon economy, power-thermal coupling, flexible load, carbon trade

CLC Number:

TK01

LI Bohang, LI Hongzhong, ZHANG Minyuan. Low-carbon economic dispatch of integrated energy systems considering load characteristics[J]. Integrated Intelligent Energy, 2023, 45(8): 72-79.

Figures/Tables 10

Fig.1

Fig.2

Table 1

Equipment parameters

类型	功率/kW	运行成本/[ $元 · (k W · h) - 1$ ]
光伏	以预测值为主	0.40
风电	以预测值为主	0.51
EB	500	4.60
CHP电功率	65	参照天然气价格
CHP热功率	164	参照天然气价格

Table 1

Table 2

Parameters of flexible power load

类型	持续时间/h	调度成本/[ $元 · (k W · h) - 1$ ]
可转移电负荷	—	0.30
可平移电负荷	3	0.15
可削减电负荷	—	0.38

Table 2

Table 3

Parameters of flexible thermal load

类型	持续时间/h	调度成本/[ $元 · (k W · h) - 1$ ]
可削减热负荷	—	0.20
可平移热负荷	3	0.15

Table 3

Fig.3

Fig.4

Fig.5

Fig.6

Table 4

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场景	碳交易成本	总运行成本
场景1	185.11	3718.5
场景2	147.54	3575.9