基于牵制控制的交流微电网群中构网型逆变器的网络化安全全局运行

This paper presents a detailed insight into the effects of cyber adversaries on global power sharing, frequency synchronization and voltage regulation of grid forming inverters (GFMIs) in pinning-based AC microgrid (MG) clusters. The previously reported techniques in literature have limited their cyber attack detection boundary to the secondary control layer. It is, however, proven in this paper that they are not sufficient to prevent the propagation of cyber attacks in higher level control assisted networked MG clusters. Therefore, a deviation-derived secure framework is proposed at each level of the distributed, hierarchical control. It is coordinated by the state reconstruction feature. Further, the proposed method for GFMIs is tested in a heterogeneous environment with grid following inverter control. Finally, time domain simulations in MATLAB/SimPowerSystems elucidate the effectiveness of the proposed secure controllers under various attack scenarios. Moreover, the proposed cyber-secure global operation is validated in power hardware in loop experimentation. It is developed with real time digital simulator, power amplifier and a field programmable gate array based WAVECT controller used for controlling the experimental setup in hardware.