考虑燃料电池和电解槽虚拟惯量支撑的电力系统优化调度方法

Optimal scheduling method of power system considering virtual inertia support of fuel cells and electrolyzers

质子交换膜(PEM)燃料电池和电解槽可向系统提供虚拟惯量支撑,提高系统频率稳定水平。针对目前缺乏相关模型及调度方法的现状,提出考虑氢能系统虚拟惯量支撑的电力系统优化调度方法。基于虚拟同步机技术,构建PEM燃料电池和电解槽的虚拟惯量响应模型,提出考虑多工况运行模式的燃料电池和电解槽的虚拟惯量评估模型。构建计及氢能系统虚拟惯量和频率支撑的电力系统频率安全约束模型。针对含氢能的电力系统,提出考虑频率安全约束的日前优化调度模型及求解方法。基于改进的IEEE 118节点标准测试系统进行仿真分析,结果表明,所提方法能够有效量化PEM燃料电池和电解槽的虚拟惯量水平,充分发挥其惯量及频率支撑作用,有效降低频率变化率和最大频率偏差。

Proton exchange membrane(PEM)fuel cells and electrolyzers can provide virtual inertia support to the system and improve the frequency stability of the system.In view of the lack of relevant models and scheduling methods,an optimal scheduling method of power system considering virtual inertia support of hydrogen energy system is proposed.Based on the virtual synchronous machine technology,the virtual inertia response models of PEM fuel cell and electrolyzer are constructed,and the virtual inertia evaluation models of fuel cell and electrolyzer considering multi-operating modes are proposed.The frequency safety constraint model of power system is constructed,which takes the virtual inertia and frequency support of hydrogen energy system into account.The day-ahead optimal scheduling model and solution method considering the frequency safety constraints are proposed for the power system with hydrogen energy.Based on the improved IEEE 118-bus standard test system,the simulative results show that the proposed method can effectively quantify the virtual inertia level of PEM fuel cell and electrolyzer,give full play to their inertia and frequency support,and effectively reduce the rate of change of frequency and the maximum frequency deviation.