压缩空气储能系统调相运行模式初探

Preliminary Investigation on Operation Mode of Compressed Air Energy Storage System as Synchronous Condenser

压缩空气储能是一种大规模物理储能技术,为实现电网负荷削峰填谷、缓解弃风弃光问题提供了崭新的解决思路。同时,未来电网也逐步呈现新能源高占比、"强直弱交"等形态,对储能系统的运行模式和功能特征有了更丰富而具体的要求。提出了压缩空气储能系统调相运行模式,从技术原理、设计思路、性能评估、算例分析等方面探索并验证了压缩空气储能系统调相运行的有效性。所提出的调相运行模式不仅能为电网提供动态无功支撑,而且能通过降低机组启停次数而减少运维量;提出的调相运行模式很好地扩展了系统功能,有望成为压缩空气储能推广应用的重要支撑技术。

Compressed air energy storage(CAES) is a large scale physical energy storage technology, which provides a new solution for peak cutting and valley filling of power load, and mitigates the problem of renewable energy curtailment. Meanwhile, the power grid will gradually present new forms of higher proportion of renewable energy and 'strong DC weak AC'. This has more abundant and specific requirements for the operating modes and functional characteristics of energy storage systems. The condenser operation mode was proposed. The effectiveness of the condenser operation of CAES system was explored and verified from the aspects of technical principles, design ideas, performance evaluation, calculation examples. The proposed condenser operation mode can not only provide dynamic reactive power support for the power grid, but also can reduce the maintenance work for reducing the frequent start and stop of turbo-generator units. The condenser operation mode expands system function well and is expected to become an important technical feature of CAES system.