计及下垂曲线与储能的孤岛微电网分级调度策略  

Hierarchical dispatching strategy of islanded microgrid considering droop curve and energy storage

作　　者：李可然 刘继春[1] 杨瑞琳 刘易珠 LI Keran;LIU Jichun;YANG Runlin;LIU Yizhu(College of Electrical Engineering,Sichuan University,Chengdu 610065,China;State Grid Hunan Electric Power Co.,Ltd.,Changsha 410004,China)

机构地区：[1]四川大学电气工程学院,四川成都610065 [2]国网湖南省电力有限公司,湖南长沙410004

出　　处：《电力科学与技术学报》2024年第2期223-230,共8页Journal of Electric Power Science And Technology

基　　金：国家自然科学基金(U2066209)。

摘　　要：目前国内孤岛微电网运行调度中分布式发电(distributed generation,DG)电源被统一处理为传统发电机的PQ模型,与微电网实际情况不一致,同时较少有文献考虑电压潮流约束,为此,考虑下垂控制DG静态模型,计及潮流非线性约束,提出含可再生能源出力、储能充放电的孤岛微电网分级调度策略;同时,考虑DG下垂特性与潮流非线性约束,上级孤岛微电网经济、安全运行调度依靠集中优化控制器进行,控制下级DG各类静态参数及各储能装置充放电功率;下级依靠传统下垂控制在上级控制参数下实时调整有功、无功出力,维持系统频率、电压稳定。上述模型采用YALMIP+IPOPT程序进行求解,以14节点系统为例开展模拟仿真。仿真结果证明:所提模型及其求解方法可以有效求解孤岛微电网经济及安全运行调度模型,在稳定并提高系统电压水平、降低孤岛微电网运行费用方面具备显著优势。At present,the operation dispatching of distributed generadion(DG)in islanded microgrids is treated uniformly as PQ model of traditional generators,which is inconsistent with the actual situation of microgrids.At the same time,few literatures consider voltage and power flow constraints.Therefore,considering the static model of droop control for DG and taking into account the nonlinear constraints of power flow,a hierarchical scheduling strategy for islanded microgrids with renewable energy output and energy storage charging and discharging is proposed.Meanwhile,considering the droop characteristics of DG and the nonlinear constraints of power flow,the economic and safe operation scheduling of the superior island microgrid adopts the centralized optimal controller to control various static parameters of the inferior DG and the charging and discharging power of each energy storage device.The inferior level uses traditional droop control to adjust active and reactive power output in real time under the control parameters of the superior level to maintain system frequency and voltage stability.The above model is solved by YALMIP+IPOPT program,and simulation is carried out with a 14-node system as an example.The simulation results prove that the proposed model and its solution method can effectively solve the economic and safe operation scheduling model of the islanded microgrid;it has significant advantages in stabilizing and improving the system voltage level and reducing the operating cost of the islanded microgrid.

关 键 词：孤岛微电网 分布式发电 储能装置 下垂控制 分级调度 

分 类 号：TM73[电气工程—电力系统及自动化]