混合储能系统在风电网应用的经济性模型与评价分析

Economic Model and Evaluation of a Hybrid Energy Storage System Applied in Wind Power Network

高温超导磁储能与电化学混合储能系统联合应用时能够稳定系统功率,阻尼低频功率振荡,避免电压骤降,稳定可再生能源电网。然而,考虑到高温超导磁储能系统和电池系统的成本和寿命,迫切需要进行成本效益分析来证明其在电网应用发展中的作用。文章介绍了超导储能系统和电化学储能成本的技术经济分析模型,研究了混合储能系统在电网中的应用方法,并针对福建某风电场引进的10 MJ/37 MW高温超导磁储能系统和20MWh/5 MW磷酸铁锂电池储能系统,通过计算风电弃风损失、新建输电线路投资和混合储能系统的投资成本,比较新输电线路与混合储能系统的收益,为混合储能系统在可再生能源电网应用的经济性分析提供重要参考。

The combined application of high temperature superconducting magnetic energy storage （SMES） and battery energy stor-age system （BESS） can stabilize substantial power systems with integration in terms of damping out low-frequency power oscillations,avoid voltage sags and reduce the renewable curtailment. However, considering the cost and lifespan of SMES and BESS, there is an ur-gent to conduct cost-benefit analysis to justify their role in smart grid development. This paper presents the technology economic analy-sis of a superconducting energy storage system and a battery energy storage system. The application method of this hybrid energy stor-age system in a typical Fu Jian power grid is studied. Based on wind abandoning of a wind farm, a 10 MJ/37MW SMES and a 20MWh/5MW BESS are introduced to restrain income of the wind abandoning. By calculating the loss of wind abandoning, the investments of new transmission line and the cost of hybrid energy storage system are compared to provide an important reference for the economicanalysis of the hybrid energy storage system in the renewable energy grid.