计及电转气-风-火-核-碳捕集的多源联合系统优化调度

doi:10.11930/j.issn.1004-9649.202306048

摘要/Abstract

摘要：

在风-火-核-碳捕集多源联合系统中，核电机组在参与电网调峰时存在调峰深度选择不精确的问题。此外，该多源联合系统还存在风电消纳不足的问题。为此，构建了一种计及线性化核电机组调峰深度模型的电转气（power to gas，P2G）-风-火-核-碳捕集多源联合系统，并对该系统进行了日前优化调度。首先，基于核电机组负荷跟踪模式，通过引入连续变量，提高了调峰深度选择的准确性；然后，分析了碳捕集电厂-P2G联合运行模式及需求响应资源对促进风电消纳的积极作用；最后，以系统综合运行成本最低为目标函数，同时考虑碳交易机制，在Matlab平台搭建仿真模型，验证了所构建多源联合系统的有效性。结果表明，相较于核电机组采用固定调峰档位的多源联合系统，所构建的多源联合系统能够在保证核电机组安全稳定运行的同时，实现风电完全消纳，系统碳排放量与综合运行成本分别下降了13.74%与6.27%，提高了系统运行的低碳性与经济性。

关键词: 核电机组, 风电消纳, 碳捕集, 电转气, 优化调度

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

晁文浩, 袁至, 李骥. 计及电转气-风-火-核-碳捕集的多源联合系统优化调度[J]. 中国电力, 2024, 57(1): 183-194.

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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链接本文: https://www.electricpower.com.cn/CN/10.11930/j.issn.1004-9649.202306048

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

图/表 12

图 1 计及线性化核电机组调峰深度模型的P2G-风-火-核-碳捕集多源联合系统框架

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

图 2 核电机组负荷跟踪模式

Fig.2 Mode of load tracking of nuclear power unit

图 3 CCPP净出力调整范围

Fig.3 Adjustment range of net output of CCPP

图 4 鲸鱼算法结合Yamilp求解流程

Fig.4 Solution process of WOA combined with Yamilp

图 5 IEEE 39节点系统结构

Fig.5 The IEEE 39 system structure

图 6 负荷曲线与风电场预测出力曲线

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

表 1 不同场景下的调度结果

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

图 7 不同场景下的风电出力

Fig.7 Wind power output of different scenarios

图 8 不同场景下的核电机组出力

Fig.8 Output of nuclear power units of different scenarios

图 9 不同场景下的所有机组出力

Fig.9 Output of all units in different scenarios

图 10 不同场景下的碳捕集运行能耗

Fig.10 Carbon capture energy consumption of different scenarios

图 11 不同场景下的常规火电机组出力

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

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