摘要
针对光伏发电系统出力随机性大,波动较强等问题,提出一种光伏-超级电容器-制氢混合系统控制策略。建立了光伏、超级电容器及电解槽数学模型,构建了一种变流器少、成本低的光伏、超级电容器、电解槽集结于直流母线的结构。超级电容器快速充放电,平衡混合系统的功率,电解槽消纳功率的变化,保证超级电容器端电压运行于放电深度电压和充电深度电压范围之内。此种控制策略平滑了上网功率,稳定了直流母线电压,提高了光伏利用率。PSCAD中的仿真结果验证了光伏-超级电容器-制氢混合系统模型及控制策略的有效性。
Because of the strong randomness and fluctuations for power output of photovoltaic （PV） power generation, a kind of control strategy for hybrid PV - supercapacitors - hydrogen system is proposed in this paper. The mathemati- cal models of PV, SC and EL are built, and the structure of DC-BUS linking PV, SC and EL with reduced number of converters and low cost is studied. In this structure, the SC can charge and discharge rapidly to balance the power of hybrid system, and EL can absorb the change of power consumption to ensure terminal voltage of supercapacitors running in the range of the deeply discharging voltage and charging voltage. The control strategy make the internet power be smoothed, the voltage of DC-BUS be stabilized, and the photovoltaic efficiency be improved. The PSCAD simulation results show that the model and control strategy for hybrid PV-supercapacitor-hydrogen system are effective.
出处
《现代电力》
北大核心
2017年第3期88-94,共7页
Modern Electric Power
关键词
混合系统
建模
协调控制
平滑上网功率
光伏
hybrid system
modeling
coordinated control
the smoothing of internet power
PV
