交直流混合电网是新型电力系统的重要形态之一。在传统架构中，各子网通过并联型的互联变换器连接，装置需承受系统级的电压应力，成本及损耗较高。同时鉴于串联型的线间直流潮流控制器控制自由度较低的问题，本文提出储能型电力杠杆的装置新概念：该装置串联接入交直流混合电网的联络线中，实现以储能系统的小额功率“撬动”全局系统大额功率的灵活调控。基于该装置的电路拓扑及工作原理，本文提出面向交直流混合电网的全局灵活功率调控策略，可实现系统中直流子网的功率均分及交流子网输出功率的定量调控。建立系统的小信号模型，分析关键控制参数大范围扰动对系统稳定性的影响，并验证所提调控策略的稳定性。最后，搭建原理性样机，通过实验验证所提装置及调控策略的有效性。

Hybrid AC/DC grids are a critical evolution pathway for modern power systems. Conventional parallel interlinking converters incur significant costs and losses due to high system-level voltage stress, while series-type converters like interline DC power flow controllers offer inherently limited control flexibility. To address these combined challenges, this paper proposes an energy storage-based power lever (ES-PL) with its control strategy. This device, connected in series within the interlinking lines, leverages small-scale power of energy storage to enable large-scale, flexible power flow regulation across the entire grid. Based on the circuit topology and operational principles of the proposed ES-PL, a global flexible power regulation strategy is designed for hybrid AC/DC grids. This strategy achieves power sharing within DC subgrids and enables quantitative power control for AC subgrid. A small signal model analyzes the impact of wide-range disturbances in key control parameters on system stability, verifying the stability of the proposed control strategy under dynamic conditions. Finally, a proof-of-concept prototype of the ES-PL is constructed to verify the effectiveness of the proposed device and its control strategy.