摘要
孤立微电网之间的互联问题得到了广泛关注,优化调度是保证互联微电网系统运行经济性的重要环节。文章提出一种基于交替方向乘子法(alternating direction method of multipliers,ADMM)的互联微电网系统分布式优化调度方法。首先,对互联微电网系统优化调度的基本模型进行了说明;其次,介绍了各分布式电源的基本模型,建立面向实时优化调度的储能系统成本模型,将储能系统寿命损耗成本与放电功率之间的关系等效为二次型函数;然后,提出了基于ADMM的分布式优化调度模型及求解算法,在保证各微电网隐私的情况下,仅需提供"期望交换功率",即可通过交互迭代实现互联系统的最优调度。最后,通过三微电网互联算例,分析了分布式优化调度的运行结果,验证了所提方法的有效性。
To improve economy and reliability of microgrid operation, interconnection of isolated microgrids attracts increasing comprehensive attention and optimal dispatching is important in securing interconnected microgrid system’s economical operation. Distributed optimal dispatching method based on alternating direction method of multipliers （ADMM） is proposed. Firstly, basic optimal model of interconnected microgrid system is formulated. Secondly, model of each distributed energy resource is presented and cost model of battery energy storage system is built to deal with real-time optimal dispatching with relationship between battery’s life cost and its output power equivalent to quadratic model function. In case of securing privacy of each microgrid, distributed optimal dispatching model of interconnected microgrid system and its solving algorithm can be managed with interactive iteration method with merely knowledge of each microgrid’s expected exchange power, which can be derived in this paper. Finally, interconnected microgrid system with three microgrids is used for case study and result of distributed optimization and centralized optimization is analyzed, and the method’s effectiveness is verified.
出处
《电网技术》
EI
CSCD
北大核心
2016年第9期2675-2681,共7页
Power System Technology
基金
基金项目:国家高技术研究发展计划项目(863计划)(2014AA052001)
中央高校基金科研业务费专项资金资助(2015ZD02)~~
关键词
微电网
互联微电网系统
分布式优化调度
交替方向乘子法
microgrid
interconnected microgrid system
distributed optimal dispatching
alternating direction method of multipliers
