The increasing penetration of renewable energy is essential for achieving sustainable development goals, yet it poses significant challenges to power grid stability, energy security, and resilience. Solar power, in particular, is variable and weather-dependent, requiring well-defined strategies to ensure reliable integration into existing power systems. This study focuses on developing strategic approaches for integrating large-scale and distributed solar power into power grids while enhancing energy security and system resilience against disruptions. The study employs a mixed-methods approach combining a comprehensive literature review, power system modeling, and scenario-based analysis. Grid integration strategies were evaluated using simulation models that assess load balancing, frequency regulation, and reliability under varying solar penetration levels. Key strategies examined include energy storage deployment, smart grid technologies, demand-side management, and policy-driven market mechanisms. The findings indicate that coordinated integration strategies significantly improve grid resilience and energy security. Energy storage and advanced grid management systems reduce intermittency impacts, while demand response mechanisms enhance system flexibility. High solar penetration scenarios showed improved resilience to fuel supply disruptions and reduced dependence on centralized generation. Strategic solar power integration, supported by technological, operational, and policy measures, can strengthen power grid resilience and energy security. The study provides a framework to guide policymakers and grid operators in planning reliable, secure, and sustainable solar-integrated power systems.