摘要
光伏等可再生能源快速发展的同时也给微网系统频率稳定带来了巨大挑战。为解决微网源-荷之间功率不平衡造成的频率稳定性问题,建立了基于孤岛光伏微网的双层多时间尺度频率优化调度模型,从系统规划和运行两方面综合考量了系统频率的优化调节问题,在上层模型中构建了以经济收益为目标的函数,对微网系统长期储能进行优化配置;在下层模型中建立了运行成本和频率偏差均方根的多目标函数,建立了光伏动态减载和储能协调调频的日前优化调度模型,并引入黄金搜索算法对多时间尺度双层优化模型进行求解,给出了最优储能配置以及各机组的运行特性。通过算例仿真验证了所提模型的正确性和有效性。
The rapid development of renewable energy sources such as photovoltaic also brings great challenges to the frequency stability of microgrid system,in order to solve the frequency stability problems caused by the power imbalance between the source and load of microgrid,a two-layer multi-timescale frequency optimization scheduling model based on islanded photovoltaic microgrid has been established,and the optimal regulation of the system frequency has been considered comprehensively in terms of both system planning and operation,and a function of economic gain has been constructed in the upper-layer model.In the upper-layer model,a function with the economic return as the objective is constructed to optimize the long-term energy storage configuration of the microgrid system.In the lower-layer model,a multiobjective function with the operating cost and the root-mean-square of the frequency deviation is constructed to establish a day-ahead optimal dispatch model with the photovoltaic dynamic load shedding standby and the coordinated frequency regulation of the energy storage,and gold search algorithmis introduced to solve the double-layer multi-timescale optimization model,which gives the optimal energy storage configuration as well as the operating characteristics of each unit.Finally,the correctness and validity of the proposed model are verified by simulation example.
作者
杨天国
周翔
李晓敏
吴庆升
徐璞
何逸
YANG Tianguo;ZHOU Xiang;LI Xiaomin;WU Qingsheng;XU Pu;HE Yi(Dehong Power Supply Bureau,Yunnan Power Grid Corporation,Dehong Yunnan 678400,China;Information Center,Yunnan Power Grid Corporation,Kunming Yunnan 650217,China)
出处
《电源技术》
CAS
北大核心
2024年第9期1853-1859,共7页
Chinese Journal of Power Sources
基金
云南电网有限责任公司科技项目(YNKJXM20220134)。
关键词
光伏调频
容量优化层
调度优化层
黄金搜索算法
仿真模型
PV frequency regulation
capacity optimization layer
scheduling optimization layer
golden search optimization algorithm
simulation model
