面向电能交易的用户级直流微网母线电压分层控制策略研究

传统用户级直流微网运行策略无法满足微网用户分布式电能交易需求,为此提出一种面向分布式电能交易的直流微网母线电压分层控制策略。该策略依据直流母线电压信号,将微网划分为6个运行区域。根据每一层区域的特点,将微网内分布式单元设置为特定的电压主控单元(控制直流母线电压设备对象)和能量单元(提供功率输出设备对象)。分布式单元依据微网运行区域的变化而改变其运行模式。考虑用户光伏、储能多种资源参与交易的可能性,基于微网交易模式,提出售电状态和购电状态下的微网控制策略。仿真结果验证了所提策略的可行性和正确性。

Research on hierarchical control strategy of a user level DC microgrid bus voltage for electricity trading

Traditional household DC microgrid operation strategy cannot meet the demand of distributed electricity trading for microgrid users.Therefore this paper proposes a hierarchical control strategy for DC microgrid bus voltages for distributed electricity trading.Under this strategy,the microgrid is divided into six operational areas according to the DC bus voltage signal.According to the characteristics of each layer area,the distributed units in the microgrid are set as a specific voltage master control unit(device objects that control the DC bus voltage)and energy unit(device objects that provide power output).The distributed units change operation mode according to the change of the operational area of the microgrid.Considering the possibility of users'photovoltaic and energy storage resources participating in the trading,based on the microgrid trading model,this paper proposes a control strategy of the microgrid in the state of power sale and power purchase.The simulation results verify the feasibility and correctness of the proposed strategy.