Optimal configuration of integrated energy systems considering gas and thermal inertia

doi:10.3969/j.issn.2097-0706.2023.10.006

Abstract

Abstract:

The integrated energy systems coupling electricity，gas and heat resources is of flexible inertia. Given that both the thermal system and natural gas system have similar slow-dynamic characteristics，they can provide buffer space for external power fluctuations. In the context of power shortage， gas-thermal inertia of integrated energy systems can provide power support for power grid faults. Firstly， mathematical models are established based on the gas-thermal inertia characteristics. Then，an operation strategy of the integrated energy system considering gas-thermal inertia is proposed. Aiming at the optimal economy，an optimization model for the energy system is established to solve the power shortage. The feasibility of the proposed strategy is verified under different practical scenarios， and the optimal economic operation solutions of the integrated energy system considering gas-thermal inertia under different conditions are given.

Key words: integrated energy system, gas-thermal inertia, optimal configuration, combined heat and power unit, power support, combined heat and power generation

CLC Number:

TK01

MIAO Cairan, ZHU Yaopei, WANG Qi. Optimal configuration of integrated energy systems considering gas and thermal inertia[J]. Integrated Intelligent Energy, 2023, 45(10): 44-52.

Figures/Tables 17

Fig.1

Fig.2

Fig.3

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Fig.5

Table 1

Parameters of energy hub equipment in the IES

参数	值	参数	值	参数	值
$η T$	0.980 0	$η E B$	0.900 0	$η C H P E$	0.300 0

Table 1

Table 2

参数	值	参数	值
$c R H$	0.009 6	$c R G$	0.038 6

Table 2

Table 3

Table 4

Table 5

Table 6

Upper limits of outputs under various power generation forms kW

参数	值	参数	值	参数	值
$P R H, m a x$	600	$P R G, m a x$	500	$P G, m a x$	500

Table 6

Table 7

Fig.6

Fig.7

Table 8

Fig.8

Table 9

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总热量偏移绝对值/ (kW·h)	用户舒适度单位成本/ [美元·（kW·h）^-1]
[0~50)	0.029 0
[50~100)	0.039 1
[100~150)	0.058 0
[150~200]	0.087 0

热电比	热电比调整单位成本
[1.00~1.33)	0.029 0
[1.33~1.83)	0.039 1
[1.83~2.50)	0.058 0
[2.50~3.17]	0.087 0

出力形式	成本/[美元·（kW·h）^-1]	功率/kW
热惯性	14.816 1	1 537.293 2
气惯性	63.407 3	1 644.775 9
发电侧	0.000 0	0.000 0
用户舒适度	6.264 5	—
热电比调整	51.914 7	—
总成本	136.402 7	—

阶段	热电比范围	热电比调整成本趋势	功率支撑总成本趋势
1	[1.30~2.50)	增加	减少
2	[2.50~3.17]	增加	增加

平时电价/ [美元·（kW·h）^-1]	气热惯性成本/美元	发电侧成本/美元	功率支撑总成本/美元
0.071 0	74.48	0.00	135.23
0.069 5	74.48	0.00	135.23
0.068 1	3.07	109.42	100.11
0.067 4	2.04	89.29	97.78
0.006 5	1.02	84.96	88.74