In this paper. the particle swarm optimization (PSO) technique is used to optimally allocate phasor measurement units (PMUs) within standard test systems and a real-world power system. PMUs are allocated at system substations in a manner that ensures complete system observability while minimizing installation costs. This study considers IEEE 14-. https://www.markbroyard.com/mega-pick-revlon-colorstay-lip-liner-plum-665-discount-top-super/