Abstract In order to mitigate most power quality issues in renewable power penetrated systems, load frequency control in automatic generation control based power systems and transient stability concerns in any power system, the deviation in frequency at the point of common coupling is chosen as the driving input for SMES active power control (Δf-control). We report a rate of change of frequency (ROCOF) controlled SMES as a resilient damping device to counter exogenous uncertainties in a wind based multi machine system. Primarily, the ROCOF is contingent on the active power mismatch. SMES reference active power command is issued using a genetic algorithm tuned scheme, participating through ROCOF measurement. The non linear action of SMES is realized by controlling the converter firing angles by a smooth four-zone operation, thus determining the voltage applied across the superconducting inductor. While preserving the dynamics of the DC link and supervising the state of charge (SoC) of the inductor, the effectiveness of the aforementioned control strategy is authenticated by performing non-linear simulations in MATLAB/Simulink. In addition, the dominant modes are also tracked and it is found that the percentage increase in aggregate damping ratio is around 133% using the proposed ROCOF-SMES control.

中文翻译：

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通过 ROCOF 控制的 SMES 全面改善电力系统稳定性

摘要 为了缓解可再生能源渗透系统中的大部分电能质量问题、基于自动发电控制的电力系统中的负载频率控制以及任何电力系统中的暂态稳定性问题，选择公共耦合点的频率偏差作为驱动输入。用于 SMES 有功功率控制 (Δf-control)。我们报告了频率变化率 (ROCOF) 控制的 SMES 作为弹性阻尼装置，以应对基于风的多机系统中的外生不确定性。ROCOF 主要取决于有功功率不匹配。SMES 参考有功功率命令使用遗传算法调谐方案发出，通过 ROCOF 测量参与。SMES 的非线性作用是通过平滑的四区操作控制转炉点火角来实现的，从而确定施加在超导电感器两端的电压。在保留直流链路的动态特性并监控电感器的荷电状态 (SoC) 的同时，通过在 MATLAB/Simulink 中执行非线性仿真验证了上述控制策略的有效性。此外，还跟踪了主要模式，发现使用建议的 ROCOF-SMES 控制，总阻尼比的百分比增加约为 133%。