【摘要】 储能的规模化应用为可再生能源高占比的新型电力系统提供重要支撑。高压级联储能系统将电池布置于级联H桥模块直流侧，是提高储能设备单机容量的有效手段。储能变流器控制方式包括跟网型控制和构网型控制两类，其中跟网型控制功率响应快速，但在弱网中易振荡失稳；构网型控制具有主动支撑能力，但存在强网适应性问题。该文提出了分型融合控制方法，实现了跟网特性与构网特性的柔性融合和灵活调节，提高了高压级联储能系统的电网强度适应性。通过仿真分析验证了所提控制方法的实用性与有效性。更多还原

【Abstract】 The large-scale application of energy storage can provide important support for the high proportion of renewable energy in the new power system. The high-voltage battery storage system with cascade topology distributes batteries on the DC side of each H bridge, which is an effective way to increase energy storage capacity. The control of the power conversion system can be categorized as the grid following control(GFL) and the grid forming control(GFM). The GFL has the fast power response capability but weak grid instability risk, while the GFM has the active grid support capability but strong grid adaptability issue. This paper proposes a type-merged control method to improve the grid strength adaptability of the high-voltage large-capacity battery energy storage systems, where the flexible integration and adjustment of GFL and GFM characteristics are achieved. Simulation analysis shows the practicality and effectiveness of the proposed control method.更多还原