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Protection of distribution network considering fault ride through requirements of wind parks

机译：考虑风电场需求的故障穿越对配电网的保护

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Fault ride through (FRT) requirements are imposed by grid codes in order to prevent from the loss of power generation due to the voltage drop caused by grid faults. To keep the wind turbine connected to the network the protection system should remove the fault, within the time specified by FRT requirements. This paper proposes a method for considering the FRT requirement characteristic of wind parks in over current relays protection coordination problem. For this purpose, a mathematical relation is presented between the fault current passing through the relay and the voltage drop at the point of common coupling (PCC) of wind turbine. Then, using this formulation, a new index is defined to evaluate the time coordination between FRT requirements and protection system. Also, a new objective function is proposed to determine the optimal setting of relays and the optimal impedance value of fault current limiter (FCL) in order to FRT capability enhancement. The proposed approaches are tested on the IEEE-30 bus and IEEE-33 bus test systems to verify high performance of them in improving the FRT capabilities of wind parks.
机译：电网规范规定了穿越故障（FRT）要求，以防止由于电网故障引起的电压降而导致发电损失。为了使风力涡轮机保持与网络的连接，保护系统应在FRT要求指定的时间内消除故障。提出了一种考虑过流继电保护协调问题中风场FRT需求特性的方法。为此，在通过继电器的故障电流与风力涡轮机的公共耦合点（PCC）处的电压降之间建立了数学关系。然后，使用该公式，定义了一个新的指标来评估FRT要求和保护系统之间的时间协调。此外，提出了一种新的目标函数，以确定继电器的最佳设置和故障电流限制器（FCL）的最佳阻抗值，以增强FRT能力。在IEEE-30总线和IEEE-33总线测试系统上对提出的方法进行了测试，以验证它们在提高风电场FRT功能方面的高性能。

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