基于氢储能的含大规模风电电力系统经济调度

Economic Dispatch of Power System Containing Large-scale Wind Power Based on Hydrogen Energy Storage

针对由大规模风力发电并网带来的消纳困难问题,利用由碱式电解槽、储氢罐、氢氧燃料电池构成的氢储能系统将弃风转换成氢气储存起来,用以满足外界氢气负荷需求或于负荷高峰期发电补充上网。首先对风电出力的不确定性和氢储能系统进行建模。为了降低传统鲁棒优化求解的保守度,利用考虑保守度可调的鲁棒优化盒式集合描述风电出力。在此基础上,以降低弃风和提高系统总体的经济性为目标,建立了基于氢储能的含大规模风电电力系统经济调度模型。算例表明:所建立的优化调度模型兼顾求解的鲁棒性和经济性,并且可以显著减少弃风、降低系统的总成本。

In response to the difficulty in absorbing the large-scale wind power generation connected to the grid,a hydrogen storage system composed of alkaline electrolyzers,hydrogen tanks,and oxyhydrogen fuel cells was built to convert the abandoned wind into hydrogen which can be used to meet the external hydrogen load demand or converted into electricity to supplement the grid during peak load periods.Firstly,the models of the uncertainty of wind power output and hydrogen energy storage system were established.In order to reduce the conservative degree of the traditional robust optimization solution,the robust optimization box set considering the adjustable conservative degree was used to describe the wind power output.On this basis,with the goal of reducing wind curtailment and improving the overall economy of the system,an economic dispatch model of a large-scale wind power power system based on hydrogen storage was established.The calculation example shows that the optimal scheduling model established takes into account the robustness and economy of the solution,and can significantly reduce the abandonment of wind and reduce the total cost of the system.