风氢耦合并网系统能量管理控制策略

Control Strategy for Energy Management of Hybrid Grid-connected System of Wind and Hydrogen

针对风氢耦合发电系统的燃料电池和电解槽出力响应延迟问题,本文构建了一种风力发电机、燃料电池、电解槽和超级电容耦合于直流母线的结构。根据燃料电池、电解槽和超级电容特性,提出了一种能量管理控制策略,使燃料电池和电解槽能够缓慢地补偿/消纳风力机与负荷调度之间的功率差,超级电容能快速地平滑燃料电池和电解槽响应延迟引起的功率不平衡,确保并网功率与负荷调度一致。Matlab/Simulink仿真结果验证了风氢耦合并网系统能量管理控制策略的有效性,该策略提高了系统的风电消纳能力,降低了并网功率波动。

To solve the problem of response delay in eletrolyzer and fuel cell of wind power coupled with hydrogen system,we proposed a dc-coupled structure system with wind generator,fuel cell,electrolyzer and supercapacitor According to the characteristics of fuel cell,electrolyzer and supercapacitor,we put forward a control strategy of energy management.Based on the proposed control strategy,the fuel cell and electrolyzer can gradually compensate/consume the difference between the power generated by wind turbines and the power required by load.Meanwhile,the supercapacitor can quickly smooth unbalance power caused by the response delay of fuel cell and electrolyzer,and ensure that the power output of hybrid system is consistent with load demand.Matlab/Simulink simulation results verify the effectiveness of the control strategy of hybrid grid-connected system of wind and hydrogen.The proposed control strategy improves the absorption capacity of wind power and reduces the grid connected power fluctuation.