What are the key electrical parameters of transmission lines?

Transmission line parameters include: resistance R (causes I^2R losses, temperature-dependent), inductance L (from magnetic field, typically 1-2 mH/km), capacitance C (between conductors and to ground, significant for long lines), and conductance G (leakage through insulators, usually negligible). These distributed parameters determine line impedance, surge impedance loading, and voltage profile. Long lines require series capacitors or shunt reactors to maintain voltage.