Optimal Dispatch of Power System with P2G-Wind-Thermal-Nuclear-Carbon Capture Units

doi:10.11930/j.issn.1004-9649.202306048

Abstract

Abstract:

In power systems consisted of wind power generation (WPG), thermal, nuclear, carbon capture units, the peak shaving depth could be inaccurately selected when nuclear power units participate in peak regulation. In addition, the excessive wind power curtailment could also be an issue. In this paper, a linearized peaking depth model for nuclear units is proposed considering their co-operation with power-to-gas (P2G), WPG, thermal, and carbon capture units. First, based on the load tracking mode of nuclear power units, the accuracy of peak shaving depth selection could be improved by adding continuous variables. Secondly, the joint operation mode of the carbon capture power plant-P2G and demand response resources could facilitate the accommodation of WPG. Finally, the minimization of system comprehensive operation costs is selected as the overall objective function. At the same time, the carbon trading mechanism is considered to build the simulation model on the Matlab platform to verify the effectiveness of the proposed model. The results show that compared with the multi -source combination system of fixed peak-module gears, the proposed multi-source combined system operation mode can ensure the safe and stable operation of the nuclear power unit while achieving WPG utilization. The carbon emissions and comprehensive operating costs have decreased by 13.74% and 6.27%, respectively, which improves the low-carbon and economics of system operation.

Key words: nuclear power unit, wind power accommodation, carbon capture, power to gas, optimal dispatch

Wenhao CHAO, Zhi YUAN, Ji LI. Optimal Dispatch of Power System with P2G-Wind-Thermal-Nuclear-Carbon Capture Units[J]. Electric Power, 2024, 57(1): 183-194.

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URL: https://www.electricpower.com.cn/EN/10.11930/j.issn.1004-9649.202306048

https://www.electricpower.com.cn/EN/Y2024/V57/I1/183

Figures/Tables 12

Fig.1 Framework of P2G-wind-thermal-nuclear-carbon capture multi-source combine system with a linearized nuclear power unit peaking depth model

Fig.2 Mode of load tracking of nuclear power unit

Fig.3 Adjustment range of net output of CCPP

Fig.4 Solution process of WOA combined with Yamilp

Fig.5 The IEEE 39 system structure

Fig.6 Curve of load and Output power of wind farm

Table 1 Scheduling results of different scenarios

项目	场景1	场景2	场景3	场景4
核电调峰成本/万元	19.79	20.03	9.23	2.32
日折旧成本/万元	64.39	64.39	64.39	64.39
溶剂损耗成本/万元	16.96	16.99	17.73	17.77
P2G运行成本/万元	—	—	13.33	7.16
碳封存成本/万元	20.56	20.50	7.71	7.86
碳交易成本/万元	–355.36	–358.93	–367.53	–392.22
弃风率/%	1.66	1.28	0.70	0.00
碳排放量/t	30 659.10	30 142.90	29 831.30	26 445.30
综合运行成本/万元	940.47	936.03	903.46	881.54

Fig.7 Wind power output of different scenarios

Fig.8 Output of nuclear power units of different scenarios

Fig.9 Output of all units in different scenarios

Fig.10 Carbon capture energy consumption of different scenarios

Fig.11 Output of conventional thermal power units of different scenarios

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