摘要
研究了综合能源系统脱网情况下短时间尺度内的能源最大化利用问题。首先针对孤网下重要负荷短时供能需求,提出了多能流协调的触发式调度策略。该策略将整个系统划分为风光储发电系统和冷热联供系统,并按照能源最大化利用的原则制定了各供能设备的出力优先级。在此基础上,针对风光储发电系统,制定了多储能单元协调的功率分配策略,各储能单元按照可调度容量之比进行充/放电,在短时间内最大化利用各储能单元的容量。针对冷热联供系统,制定了燃气机预留最小电功率PQ. Lmin动态设置方法,根据不同时段供用能情况动态调整PQ. Lmin的大小,保持燃气机始终运行在最高效状态,最大限度输出冷/热/电能。算例分析结果表明:所提策略可以在短时间内充分利用多种供能设备,有效延长供能时间,实现能源在短时间内的最大化利用。
In this paper,the problem of energy maximization in a short time scale is studied when the integrated energy system is offline.Firstly,an optimal dispatching strategy considering multi-energy flow coordination is proposed to meet the short-term energy demand of important loads under isolated networks.The strategy divides the whole system into wind-solarstorage power generation system and combined cooling and heat supply system.According to the principle of maximizing energy utilization,the output priority of each energy supply device is formulated.On this basis,a coordinated optimal dispatching strategy for multi-energy storage units is formulated for wind-solar-storage power generation system.Each energy storage unit is charged/discharged according to the ratio of dispatchable capacity,and the capacity of each energy storage unit is maximized in a short time.For the combined cooling and heating system,a dynamic setting method of minimum reserved electric power PQ.Lmin for gas engine is developed.The value of PQ.Lmin is dynamically adjusted according to the energy supply situation in different periods,so that the gas engine can always operate in the most efficient status and output the maximum cold/heat/electric energy.Through an example analysis,the proposed strategy can make full use of a variety of energy supply device in a short time,effectively prolong the energy supply time,achieve the maximum utilization of energy in a short time,and verify the effectiveness of the proposed strategy.
作者
刘小龙
李欣然
刘志谱
卢颖华
罗真
刘明爽
LIU Xiaolong;LI Xinran;LIU Zhipu;LU Yinghua;LUO Zhen;LIU Mingshuang(College of Electrical and Information Engineering,Hunan University,Changsha 410082,China;Sunw oda Electronic Co.,Ltd.,Shenzhen 518108,Guangdong Province,China)
出处
《电力建设》
北大核心
2019年第8期103-111,共9页
Electric Power Construction
基金
国家重点研发计划项目(2017YFB0903400)
国网湖南省电力有限公司重点科技计划项目(5216A7160004)~~
