摘要
[目的]当前,多能互补是降低可再生能源弃电现象的重要手段之一。随着电转气(Power to Gas,P2G)技术的进步,电和气的转换也成为保障综合能源系统供应的有效途径。然而,当前P2G环节中电转氢气(Power to Hydrogen,P2H)受成本的制约难以具备经济性,只有利用弃风、弃光等资源才能实现可持续发展。此外,碳捕集技术也为电转气环节提供了原料供应,从而降低了系统的购气成本。尽管对于P2G的研究很多,但是鲜有研究针对P2G整个过程不同环节的综合效益展开评价。[方法]文章试图构建一个以可再生能源发电为主,燃气发电辅助的微电网系统,针对P2G过程中P2H以及氢气甲烷化两个环节进行精细化测算。[结果]在考虑碳市场、氢市场和甲烷市场的情况下,运用综合评价方法,对比在以电力需求为主的不同场景下P2H以及电转甲烷(Power to Methane,P2M)的经济-环境-能源效益,从而为推广P2G在不同场景下的应用提供合理建议。[结论]结果表明,当可再生能源发电占比很高时,含P2H的微电网系统要比含P2M的微电网系统具有更高的能源和经济价值,尽管在环境效益方面略逊一筹但是差别不大;含P2M的微电网系统在可再生能源发电和燃气轮机发电达到最佳比例时表现最优;当可再生能源发电占比低于65%时,增设P2G的效益不佳。
[Introduction]At present,multi-energy complementation is one of the important means to reduce the phenomenon of renewable energy curtailment.With the advancement of power to gas(P2G)technology,the conversion of power and gas has also become an effective way to ensure the supply of comprehensive energy systems.However,in the current P2G link,the power-tohydrogen(P2H)technology is not economical due to cost constraints,and sustainable development can only be achieved by utilizing resources such as curtailed wind and light.In addition,carbon capture technology also supplies raw materials for the P2G link,thereby reducing the gas purchase cost of the system.Although there have been many studies on P2G technology,few studies evaluate the comprehensive benefits of different links in the whole process of P2G.[Method]This study attempted to construct a microgrid system that is mainly based on renewable energy power generation and supplemented by gas-fired power generation,and conducted detailed calculations for the P2H and hydrogen methanation in the P2G process.[Result]Taking into account the conditions of carbon market,hydrogen market and methane market,a comprehensive evaluation method is applied to compare the economic-environmental-energy efficiency of P2H and power-to-methane(P2M)in different scenarios dominated by power demand,so as to provide reasonable suggestions for promoting the application of P2G in different scenarios.[Conclusion]The results show that when the proportion of renewable energy power generation is very high,the microgrid system with P2H has a higher energy and economic value than that with P2M.Although it is a little less environmentally beneficial,but the difference is not significant.The microgrid system with P2M performs optimally when the proportion of renewable energy power generation to gas turbine power generation reaches the optimal ratio.When the proportion of renewable energy power generation is less than 65%,the benefit of adding P2G is not good.
作者
石梦舒
宋志成
黄元生
SHI Mengshu;SONG Zhicheng;HUANG Yuansheng(School of Economics and Management,North China Electric Power University(Beijng),Beijing 102200,China;Department of Economics and Management,North China Electric Power University(Baoding),Baoding 071000,Hebei,China)
出处
《南方能源建设》
2023年第3期74-88,共15页
Southern Energy Construction
关键词
碳捕捉
碳交易
可再生能源制氢
综合效益
经济-环境-能源
carbon capture
carbon trading
hydrogen production from renewable energy
comprehensive benefits
economicenvironmental-energy
