将可再生能源制氢与传统化工过程结合实现电-氢-化耦合,不仅可提高可再生能源的利用消纳,还有利于化工过程的绿色低碳转型。针对电-氢-化耦合系统中存在的可再生能源波动性与化工过程稳定性需求的矛盾,建立了大规模风光互补发电制氢-储氢-合成氨系统的配置模型,基于西北地区典型风光发电曲线研究风光配比、制氢容量、制氢最小负荷和氢气储罐体积等关键参数对系统运行的影响规律,并分析系统的全年运行特性。计算结果表明:当风光配比为8∶3且制氢容量与风光平均输出功率接近时,可在较小储罐体积工况下降低网电补充。制氢最小负荷降低和储罐体积增加有利于降低网电补充,有望实现系统纯绿电运行。当系统参数配置为风光配比8∶3、制氢容量400MW、制氢最小负荷20%和氢气储罐体积100000m3时,全年平均网电补充比例在5%左右。对系统8760h的模拟结果表明,制氢装置的负荷调节可减缓系统受风光发电波动的影响,通过储氢装置的进一步缓冲,可实现合成氨装置在50%~110%负荷的连续运转。

Combining hydrogen production from renewable energy with traditional chemical processes to achieve electric-hydrogen-chemical coupling can not only improve the utilization of renewable energy, but also facilitate the green and low-carbon transformation of chemical processes. Aiming at the contradiction between the fluctuation of renewable energy and the stability of chemical process in electric-hydrogen-chemical coupling system, an optimal configuration model was established, including large-scale wind-solar complementary power generation, hydrogen-storage, and ammonia synthesis system. The influence of key parameters such as wind-solar ratio, hydrogen production capacity, minimum hydrogen production load and hydrogen storage tank volume on system operation was studied, the instantaneousoperation characteristics of the system throughout the year was analyzed. The results show that when the wind-solar ratio is around 8 ∶ 3and the hydrogen production capacity is close to the wind-solar average output power, it is more likely to reduce the grid supply under thesmallest storage tank volume. The decrease of the minimum load of hydrogen production and the increase of the volume of the storage tankare conducive to the increase of the stability of the system and the decrease of the grid power supply, which was expected to realize thepure green power operation of the system. When the system parameters are configured as the wind-solar ratio of 8 ∶ 3, the hydrogen production capacity of 400 MW, the minimum hydrogen production load of 20% and the hydrogen storage tank volume of 100 000 m3, the annual average grid power supplement ratio is about 5%. The simulation results of 8 760 h system operation show that the regulation of hydrogen production load can slow down the system fluctuation. And then ammonia synthetic equipment can continuously operate in the range of50%-110% with hydrogen storage tank buffer.

0 引言

1 系统描述与计算方法

   1.1 系统介绍

   1.2 计算方法

2 系统特性分析

   2.1 风光出力特性

   2.2 系统参数影响规律

   2.3 系统年度运行特性

3 结论