基于功率分层的直流微电网协调控制策略  

Coordinated control based on power hierarchy for DC microgrid

作　　者：孟明[1] 陈世超[1] 卢玉舟 赵树军[2] 李振伟[2] 

机构地区：[1]华北电力大学电气与电子工程学院,河北保定071003 [2]国网邯郸供电公司,河北邯郸056001

出　　处：《电力自动化设备》2017年第4期30-37,共8页Electric Power Automation Equipment

摘　　要：针对以光伏发电为主的直流微电网,描述了其基本结构和组成,设定了系统各单元运行的约束条件,为协调控制策略的实施奠定了基础;依据系统净负荷和蓄电池充放电功率阈值划分了功率层区,提出了基于功率分层的协调控制策略,进一步分析了该协调控制策略下各单元的模式判别流程及变换器控制方法。仿真结果表明,该控制策略可以适应直流微电网不同的运行状态,维持直流母线电压的稳定,延长蓄电池的使用寿命,保证可再生能源的充分利用,提高系统的灵活性和稳定性。The basic structure and composition of DC mierogrid mainly based on photovoltaie power generation are described and the operational constraints of different system units are set for the implementation of its coordinated control. The power hierarchy is set according to the system payload and the charge/discharge power threshold of battery,a coordinated control strategy based on the power hierarchy is proposed,and the mode discrimination processes of different units and the control modes of different converters under this coordinated control strategy are analyzed. Simulative results show that,the proposed strategy adapts to different operating conditions of DC mierogrid,maintains the stability of DC bus voltage, prolongs the service-life of battery,ensures the full utilization of renewable energy and improves the flexibility and stability of system.

关 键 词：直流微电网 运行约束条件 系统净负荷 功率分层 协调控制 变换器控制 

分 类 号：TM727[电气工程—电力系统及自动化]