Operation Optimization for Integrated System of Wind-PV-Thermal-Storage with CC-P2G

doi:10.16183/j.cnki.jsjtu.2022.270

Abstract

Abstract:

The carbon capture (CC) and power to gas (P2G) devices can utilize the abundant new energy of the system to capture the carbon emissions generated by thermal power combustion and generate usable gas, forming a carbon resource recycling chain. In order to reduce the carbon emission of the power system, promote new energy absorption, and improve the operation flexibility of the power system, an integrated system architecture including CC and P2G is proposed and its optimization operation model is designed. The operational characteristics of power flow and carbon flow in this architecture are mainly discussed. Considering the benefits of carbon emission trading under the quota system, an optimized operation model for the integrated system of wind-PV-thermal-storage with CC-P2G is proposed, aimed at maximizing the comprehensive benefits of the integrated system and taking the operation characteristics of various equipment as constraint conditions. Furthermore, the effectiveness of the CC-P2G system in improving new energy consumption capacity and system operation efficiency is verified. The results show that the participation of the CC-P2G system needs to be effectively coordinated with market mechanisms such as carbon emissions quota trading, which can reduce the overall carbon emissions of the system and improve its operation efficiency.

Key words: integrated system of wind-PV-thermal-storage, carbon capture and power to gas (CC-P2G) system, electricity power flow, carbon flow, carbon emission quota

CLC Number:

TM743

CHENG Renli, LI Jiangnan, ZHOU Baorong, ZHAO Wenmeng, LIU Ya. Operation Optimization for Integrated System of Wind-PV-Thermal-Storage with CC-P2G[J]. Journal of Shanghai Jiao Tong University, 2024, 58(5): 709-718.

Figures/Tables 11

Fig.1

Fig.2

Fig.3

Fig.4

Tab.1

Parameters of CC-P2G system

参数	取值
碳捕集装置能耗限值, $P C C m a x$ 、 $P C C m i n$ /MW	15,0
碳捕集装置运行能耗, λ_GE/[(MW·h)·t^-1]	0.23
碳捕集率, η_c,_t/%	60~80
电转气装置能耗限值, $P P 2 G m a x$ 、 $P P 2 G m i n$ /MW	15,0
电解氢阶段能量效率, η_P2G1/%	80
甲烷化阶段能量效率, $η P 2 G 2 1$ 、 $η P 2 G 2 2$ /%	85,60
碳排放配额交易价格, $λ C q u$ /(元·t^-1)	50
燃气上网价格, p_G/(元·m^-3)	2.0
碳捕集装置可变运行成本系数, c_CC/[元·(MW·h)^-1]	138
电转气装置可变运行成本系数, c_P2G/[元·(MW·h)^-1]	234

Tab.1

Fig.5

Fig.6

Fig.7

Fig.8

Tab.2

Fig.9

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参数	取值
参数	场景1	场景2	场景3
综合效益/万元	333.5	175.8	264.4
发电收益/万元	395.8	389.5	410.9
售气收益/万元	0	0	0
减排收益/万元	89.5	-113.6	—
燃料成本/万元	92.5	84.5	95.3
系统运行成本/万元	59.3	15.6	51.2
净碳排放量/t	1 630	2 225	2 189
新能源损失电量/(MW·h)	132	269	138