基于STATCOM/HESS的有源配电网单相接地故障消弧方法

A single-phase grounding fault arc-suppression method for active distribution networks based on STATCOM/HESS

  • 摘要: 针对有源配电网的单相接地故障消弧需求,提出一种基于静止同步补偿器(STATCOM)与混合储能系统协 同的主动电流补偿方法。基于新能源场中配备的功率调节装置STATCOM与配套蓄电池,通过功能整合与协同控制, 在不额外增设专用消弧设备的前提下实现故障电流的全补偿,显著提升了设备复用率与经济性。进一步提出基于蓄 电池荷电状态的自适应选相注入策略,根据储能状态动态调整消弧电流注入相,有效维持直流电压稳定。相较于需 增设专用变流器的现有主动消弧方案,该方法在保证消弧性能的同时,大幅降低了硬件投资成本。仿真结果表明, 该方法在金属性接地和高阻接地等多种故障条件下均能有效抑制故障电流,使故障点电压趋近于零,显著优于传统 消弧线圈与无储能支持的STATCOM方案。

     

    Abstract: A coordinated control strategy utilizing a static synchronous compensator and hybrid energy storage system is proposed to achieve arc suppression in active distribution networks. By integrating existing STATCOM devices with battery storage, the proposed method achieves full fault current compensation without additional dedicated equipment, substantially reducing hardware investment costs compared with existing active arc suppression schemes. An adaptive phase-selection strategy based on the battery state of charge is developed, which dynamically adjusts the injection phase of the arc-suppression current and incorporates a hysteresis mechanism to maintain DC-side voltage stability. Simulation results demonstrate that the method effectively suppresses the fault current and reduces the fault point voltage to near zero under various conditions, including metallic and high-resistance grounding faults. The proposed strategy outperforms traditional arc suppression coils and STATCOM systems without energy storage in terms of dynamic response and arc-extinguishing reliability.

     

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