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A positive-sequence-fault-component-based improved reverse power protection for spot network with PV

机译：基于正序故障分量的改进型逆向保护，用于带有光伏的点网

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This article presents an improved reverse power protection for spot network with high penetration of photovoltaic (PV) interfaced with inverter. First, the current variation within a short time window is discussed respectively when fault occurs and PV operates with fluctuation. It can be used to determine the cause of reverse power. Second, the positive sequence fault component power is analysed when different types of fault occur at various locations. The fault section can be located mainly by comparing the power direction of positive sequence fault components among feeders, as well as comparing the output current of PV inverter with the current through its connecting switchgear. Finally, the improved reverse power protection for spot network with PV is presented, including the operating value and protection logic. This method can enhance the penetration of PV in spot network. The simulation model based on practical projects is constructed. The protection performance including load and PV fluctuation, and all kinds of fault is simulated with comparison to the present protection method. The simulation results prove the validity of the improved protection. (C) 2017 Elsevier B.V. All rights reserved.
机译：本文提出了一种用于点网的改进的反向功率保护，该点网具有与逆变器接口的高穿透率的光伏（PV）。首先，分别讨论发生故障且PV波动时在短时间内的电流变化。它可用于确定反向功率的原因。其次，当在不同位置发生不同类型的故障时，分析正序故障分量功率。主要通过比较馈线之间正序故障分量的功率方向，以及将PV逆变器的输出电流与通过其连接的开关设备的电流进行比较，可以确定故障区域的位置。最后，提出了改进的光伏点网逆功率保护方法，包括工作值和保护逻辑。这种方法可以提高光伏在现货网络中的渗透率。建立了基于实际项目的仿真模型。与目前的保护方法相比，仿真了包括负荷，光伏波动等各种故障的保护性能。仿真结果证明了改进保护的有效性。 （C）2017 Elsevier B.V.保留所有权利。

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