摘要
含水光的多能互补发电系统可以利用水电短期出力的灵活性和火电较强的调节能力,补偿光伏出力的随机性,促进光伏的最大化消纳,保证系统总出力曲线的平滑稳定。根据水光火出力的互补特性,建立了以总出力曲线变比例及其峰谷值上限比例为互补效果衡量指标的多能发电系统出力特性模型,进而根据水光火出力的配比关系,得到随时间变化的虚拟电源运行成本模型。考虑市场环境,分别按平均、跟踪负荷、根据现货价格的多种方式进行中长期电量的分解,并建立了现货价格不确定性表达模型。在此基础上,提出了计入中长期电量分解方式和现货价格波动性,以满足互补和最大年收益率为目标的多能互补发电系统容量配置模型,并利用LINGO软件进行非线性优化求解,进而提出了多能互补发电系统的容量配置规划方法。最后,通过算例仿真求得了针对规划态典型场景下不断增长的本地负荷需求的系统容量配置方案集合及其相对应的收益率,并基于对系统经济性与互补特性的权衡考量,求得了各个规划水平年系统容量配置方案。
Multi-energy complementary generation system including thermal power, hydropower and photovoltaics(PV) utilizes flexibility of hydropower and regulating ability of thermal power to compensate randomness of PV output, ensuring smooth and stable output curve, and promoting renewable energy accommodation. A output characteristic model of multi-energy generation system is established, taking the change rate of total output curve and the upper limit ratio of its peak to valley as the measurement of complementary indexes. Based on the output ratio of hydropower, PV and thermal power, a operating cost model of virtual power changing over time is obtained. In power market, various mid-long term electricity decomposition curves are constructed on the basis of average load, tracking load and spot price. Simultaneously, an uncertainty expression model of the spot price is established. Considering the mid-long term electricity decomposition and spot price volatility, an allocation model of multi-energy complementary system is proposed, meeting the complementary property and the maximum annual rate of return. The nonlinear optimization problem is solved with professional optimization software(LINGO), and then an allocation method of the multi-energy complementary system is proposed. Through case study, a collection of allocation scheme and the rate of return are obtained. Based on the trade-offs between economy and complementation, allocation for each planning year is obtained.
作者
李健华
刘继春
陈雪
陈郑波
LI Jianhua;LIU Jichun;CHEN Xue;CHEN Zhengbo(School of Electrical Engineering and Information,Sichuan University,Chengdu 610065,Sichuan Province,China)
出处
《电网技术》
EI
CSCD
北大核心
2019年第12期4387-4397,共11页
Power System Technology
基金
国家重点研发计划项目“分布式光伏与梯级小水电互补联合发电技术研究及应用示范”(2018YFB0905200)~~
关键词
可再生能源
互补性
经济性
虚拟电源
中长期合同分解
容量配置
renewable energy
complementarity
economy
virtual power
mid-long term contract decomposition
capacity allocation
