摘要
微网中的风力、光伏发电等微型电源随机性强、输出功率波动大,微型电源功率不足,微网抗扰能力弱,由并网状态转入孤岛运行时需切除大部分负荷甚至全部负荷。采用飞轮储能系统辅助的微网方案,利用飞轮储能系统大功率充放电及充放电次数无限制的特点,设计并网逆变器的定功率控制方法。通过网侧功率测量决定并网逆变器的输出电流,实现了平抑微型电源功率和负荷波动的功能。在主电网故障时,飞轮储能系统向微网短时提供大量功率,维持大部分负荷等待主电网重合闸。通过理论分析及仿真实验表明,在微网中应用飞轮储能系统是可行的、经济的、高效的,可提升微网的抗灾变能力。
Micro sources in the micro grid, represented by distributed wind power generations and photovoltaic generations, have such characteristics as the stochastic disturbance and output power fluctuations.When the grid-connected micro grid comes into the island operation mode,most of the load or even all have to be cut off due to weak anti-disturbance capability and the power shortage.The flywheel energy storage system（FESS）assisted micro grid scheme is adopted,which utilizes the characteristic of high power charge and discharge ability and infinite charge and discharge numbers of FESS,to design the fixed power control method of grid-connected inverter.The output current of the grid-connected inverter is decided through measuring the grid side power,which can smooth the power and load fluctuations of micro sources.When the transient faults occur in the main grid,large amount of power can be provided to micro grid by FESS for a short time, keeping most of the load normally work to wait for the reclosing of the main grid.The theoretical analysis and simulation experiment show that FESS applied in the micro grid is feasible, economic, and efficient,which can improve the anti-disaster ability of the micro grid.
出处
《电力系统保护与控制》
EI
CSCD
北大核心
2011年第9期83-87,113,共6页
Power System Protection and Control
关键词
微网
飞轮储能
抗灾变
供电可靠性
micro grid
flywheel energy storage system
anti-disaster
power supply reliability
