摘要
我国农村地区存在丰富的生物质资源,可通过发酵系统将其转化为沼气能加以利用.然而,沼气工程的产出以沼气为主,经济效益普遍较低,难以推广.提出一种由多种可再生能源构成的并网风-光-沼微能源网,利用太阳能、风能和沼气之间的互补性,为用户提供沼气和电力.根据微生物发酵动力学模型和沼气发酵的温敏特性,对沼气的类储能特性进行建模.同时考虑需求侧响应进一步增加系统灵活性,利用分时电价节省购电成本,从而将投资成本和年度运行成本降至最低.案例研究表明,该风-光-沼微能源网可稳定地向用户提供电力;并且通过参与需求响应,可使得投资成本降低3%~9%的情况下年收益增加127%~240%.
There are abundant biomass resources in China’s rural areas, which can be converted into biogas energy through fermentation systems. However, the rewards of the investments of the pure biogas projects is poor because biogas is a cheap resource. This paper proposes a 100% renewable grid-connected wind-solar-biogas integrated energy system which utilizes the complementarity between solar energy, wind energy, and biogas to provide users with biogas and electricity. The battery-like characteristics of biogas are modeled based on the microbial fermentation kinetic model and the temperature-sensitive characteristics of biogas fermentation. In addition, the demand-side response is considered to further increase the flexibility of the system, and the time-of-use electricity price is used to save power purchase costs, thereby minimizing investment costs and annual operating costs. Case studies show that the wind-solar-biogas micro-energy network can effectively reduce the total investment cost by 3% to 9% while increasing the benefit by 1.27 to 2.40 times.
作者
俞发强
张名捷
程语
陈达伟
杨函煜
黎灿兵
YU Faqiang;ZHANG Mingjie;CHENG Yu;CHEN Dawei;YANG Hanyu;LI Canbing(Qingyuan Power Supply Bureau,Guangdong Power Grid Co.,Ltd.,Qingyuan 511500,Guangdong,China;Key Laboratory of Power Transmission and Power Conversion Control of the Ministry of Education,Shanghai Jiao Tong University,Shanghai 200240,China;College of Electrical Engineering and Control Science,Nanjing Tech University,Nanjing 211816,China)
出处
《上海交通大学学报》
EI
CAS
CSCD
北大核心
2023年第1期10-16,共7页
Journal of Shanghai Jiaotong University
基金
广东电网公司科技项目(GDKJXM20185779-031800KK52180097)。
关键词
微能源网
沼气发电
需求侧响应
优化配置
integrated energy system
biogas generation
demand response
optimal sizing
