Virtual synchronous generator (VSG) techniques are friendly applied in inverter interfaced renewable energy sources (IIRESs), and that enables to recover the rotor inertia and provide the damping support. However, the VSG generally owns weak overcurrent ability, and its transient angle stability (TAS) under faults may be destroyed. For solving the issue, This paper puts forward a coordination method of a resistive superconducting fault current limiter (SFCL) and an additional power controller (APC). The relevant mathematical model is built, and the TAS is probed based on the extended equal area criterion (EEAC). In the coordination philosophy, the SFCL represses the fault current and prevents the disconnection of the VSG, and thereupon the designed APC is to actively adjust the VSG's power reference and positively reduce the acceleration of the virtual rotor. It is aimed to fully realize the transient power balance, and the change of the virtual rotor angle can be mitigated. Furthermore, the MATLAB platform is adopted to create a simulation model. Multiple fault scenarios are simulated, and the findings certify the efficacy and superiority of the proposed approach. The VSG successfully rides through the serious and moderate faults, and meanwhile, its transient angle stability is visibly increased.

中文翻译：

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电阻式SFCL和附加功率控制器的协调用于增强虚拟同步发电机的暂态稳定性

虚拟同步发电机 (VSG) 技术被友好地应用于逆变器接口可再生能源 (IIRES)，它能够恢复转子惯量并提供阻尼支持。然而，VSG一般过流能力较弱，故障下的瞬态角稳定性（TAS）可能会被破坏。针对这一问题，本文提出了一种电阻式超导故障限流器（SFCL）与附加功率控制器（APC）配合的方法。建立相关数学模型，并基于扩展等面积准则（EEAC）对TAS进行探测。在协调原理上，SFCL 抑制故障电流并防止 VSG 断开，因此设计的 APC 是主动调整 VSG' s 功率参考并积极降低虚拟转子的加速度。其目的是充分实现瞬态功率平衡，减轻虚拟转子角的变化。此外，采用MATLAB平台建立仿真模型。模拟了多个故障场景，结果证明了所提出方法的有效性和优越性。VSG成功渡过重、中度故障，同时瞬态角稳定性明显提高。