计及高阶方程分段线性化的港口电-氢综合能源系统优化调度

Optimal scheduling of electricity-hydrogen integrated port energy system considering piecewise linearization of high order equations

现有电-氢综合能源系统模型存在制氢、储氢装置模型不准确的问题,影响了系统运行调度的安全性。考虑储氢装置内氢气在高压状态下温度-压强的动态特性,建立港口电-氢综合能源系统优化调度模型。通过电解水制氢技术储存风光发电多余的电能,在此基础上协调电力和氢气的负荷需求,有效地提高了新能源利用率并保证了系统的安全稳定运行。对高压储气罐的温度-压强高阶非线性模型进行分段线性化处理,在保障较高精度的同时大幅提高了求解效率。典型港口综合能源系统算例验证了所提方法的有效性。

The current electricity-hydrogen integrated energy system models have the problem of inaccurate models of hydrogen production and hydrogen storage devices,which affects the security of system operation and scheduling.Considering the temperature-pressure dynamic characteristic of hydrogen in the high-pressure hydrogen storage tank,an optimal scheduling model of hydrogen-electricity integrated port energy system is built.The excess electric energy of wind and solar power generation is stored by the electrolytic water hydrogen production technology,on this basis,the load demand of electricity and hydrogen is coordinated,which effectively improves the utilization rate of renewable energy and ensures the safe and stable operation of the system.The piecewise linearization of the high-order temperature-pressure nonlinearity model of high-pressure gas tank is carried out,which greatly improves the solving efficiency while guarantees high precision.The proposed method is verified by a typical integrated port energy system example.