This research project aims to contribute towards a resilient and secure power system employing power electronics for renewable energy sources (RES) integration. The goal is to examine the security implications of integrity and availability attacks in power transmission and distribution systems, and examine the performance and economic impact on real-time energy market operations. Risk assessment methodologies will quantify attack resources under certain level of adversarial knowledge. The objective is to enhance system cyber-(resiliency, security), while addressing disruptive cyber-physical events and preventing these effects from escalating into major failures and hence causing cascading blackout scenarios.