计及氢气天然气混合运输的氢耦合综合能源系统优化调度

Optimal Dispatching of Hydrogen Coupling IES Considering Mixed Transmission of Hydrogen and Natural Gas

针对风光等可再生能源出力不确定性大、无法消纳而导致弃风弃光等问题,以及电力负荷波动对上游电网产生的不利影响,提出一种计及氢气天然气混合运输的氢耦合综合能源系统优化调度模型。首先建立综合能源系统中各部分机组出力模型,然后构建以氢气为媒介的氢储能系统,并完善了综合能源系统中电-氢-气间耦合,以提高系统运行经济性和增大可再生能源消纳为目标进行整体框架搭建,最终实现平抑负荷波动,达到电力供应需求削峰填谷的要求。根据不同场景和方案下的算例分析,验证了所提优化调度模型的能源利用效率高、消纳可再生能源能力强以及总体运行费用低的优点。

Aimed at problems such as the curtailment of wind and PV power due to the incomplete accommodation resulting from uncertain output from renewable energy of wind and PV,as well as the adverse impact of power load fluctuations on the upstream power grid,an optimal dispatching model of hydrogen coupling integrated energy system(IES)is proposed in this paper considering the mixed transmission of hydrogen and natural gas. First,an output model of each part in the IES units is established,and a hydrogen energy storage system with hydrogen as the medium is constructed.On this basis,the electricity-hydrogen-gas coupling performance of IES is perfected. Finally,with the objective of improving the system operation economy and promoting the renewable energy accommodation,an overall framework is built,thereby smoothing the load fluctuations and satisfying the requirements of peak-shaving and valley-filling of power supply. The analysis results of an example under different scenarios and different schemes verify the advantages of the proposed optimal dispatching model,including its high energy utilization efficiency,strong capability of renewable energy accommodation,and low overall operating costs.