This article presents the implementation and performance testing of a bus-differential protection for buses, which interconnect battery storage systems (BSSs). The proposed bus-differential protection is based on employing the $\alpha \beta 0$ components of the apparent powers flowing in all branches of the protected bus. The $\alpha \beta 0$ components of the apparent powers are employed due to their ability to accommodate changes in the power flow direction in the branches connected to the protected bus. The apparent powers are determined using the measured voltage and currents in all branches connected to the protected bus. The proposed $\alpha \beta 0$ -based bus-differential protection is implemented and tested for internal and external faults, which are created during the charging and discharging of BSSs. Test results demonstrate the ability of the proposed $\alpha \beta 0$ -based bus-differential protection to initiate fast, accurate, and reliable responses to internal and external faults in the protected bus. Observed response features of the proposed protection are found to have minor sensitivity to the mode of operation of the BSS (charging and discharging), fault location (internal and external), and/or fault type.

中文翻译：

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测试用于互连电池存储系统的总线的总线差分保护

本文介绍了用于互连电池存储系统 (BSS) 的总线的总线差动保护的实施和性能测试。建议的总线差动保护基于采用$\alpha\beta 0$流经受保护母线所有支路的视在功率分量。这$\alpha\beta 0$使用视在功率分量是因为它们能够适应连接到受保护母线的支路中功率流方向的变化。视在功率是使用连接到受保护总线的所有支路中测得的电压和电流来确定的。拟议的$\alpha\beta 0$ 基于总线的差动保护针对内部和外部故障实施和测试，这些故障是在 BSS 充电和放电期间产生的。测试结果证明了建议的能力$\alpha\beta 0$ 基于总线的差动保护，对受保护总线中的内部和外部故障启动快速、准确和可靠的响应。发现建议保护的观察响应特征对 BSS 的操作模式（充电和放电）、故障位置（内部和外部）和/或故障类型具有较小的敏感性。