摘要
光伏组件的随机性和间歇性,导致光伏DG输出功率不稳定,因此并网功率波动问题是光伏DG的固有缺点,为平抑光伏DG输出功率的波动以及减小功率波动对电网的不良影响,在系统中加入储能设备对稳定功率有重要作用。光储系统一般包括光伏DG、boost电路、蓄电池及双向DC/DC变换器、DC/AC逆变环节,其中双向DC/DC变换器输出端与boost电路输出端并联接在直流母线上,因此直流母线电压的稳定问题至关重要。为更好地实现电压稳定和减小电压波动,提出一种基于功率前馈的电压稳定方法,搭建了系统仿真模型,验证了方法的正确性,可行有效。
Randomness and intermittent of PV module,resulting in PV output power instability,therefore power fluctuation problem is the shortcoming of photovoltaic DG.In order to stabilize fluctuations of PV output power and reduce the adverse impact of power fluctuation on the grid,energy storage device is added to the system which plays an important role in stabilizing power.PV and storage system typically include photovoltaic DG,boost circuit,battery and bidirectional DC/DC converters,DC/AC inverter.The output of bidirectional DC/DC converter connect the output of boost circuit in parallel to the DC bus.Therefore the issue of DC bus voltage stability is crucial,in order to achieve the voltage stability and reduce voltage fluctuation,a voltage stabilization method based on the power-feedback is proposed.Finally,to verify the validity of this method,a simulation model is set up,the results show that the method is effective.
出处
《通信电源技术》
2016年第2期41-43,共3页
Telecom Power Technology
关键词
光储系统
功率前馈
母线电压稳定
功率平抑
PV and storage power system
power feedback
DC bus voltage stabilization
power stabilization
