Railway Power Supply System Market Size, Share & Industry Analysis, By System Type (Overhead Line Electrification (OLE / OCS) and Third Rail Electrification), By Current Type (Alternating Current (AC) Systems and Direct Current (DC) Systems), By Component (Traction Substations, Power Distribution Equipment, Switchgear & Protection Systems, and Others (Overhead Line / Third Rail Equipment, Control & Monitoring Systems)), By Rail Type (High-Speed Rail, Metro Rail, Light Rail, and Others), By End User (Passenger Rail and Freight Rail), and Regional Forecast, 2026-2034