Assessment of Emergency Control Strategy and Aided Decision Scheme for AC/DC Hybrid Power Systems

With the rapid development of AC/DC hybrid power systems, emergency control strategy has become an important measure to ensure the safe and stable operation of trans-region power grids. Due to the changeable operation environment of the system, the effectiveness of the emergency control strategy should be evaluated according to the real-time operation status of the power grid and the contingencies. The online tracking and integration of the adjustable resources of security control are realized by studying multi-type data extraction and association matching methods. An assessment of emergency control strategy by setting up logic assessment and index assessment. Based on the assessment results, the coordination schemes of load shedding, multi-DC emergency control, switching the pump, and other control resources are proposed, which can provide aided decision schemes for power grid dis-patching. Finally, a provincial power grid model is taken as an example to verify the effectiveness of the assessment of emergency control strategy and aided decision scheme under HVDC blocking fault.