FIELD: solid fuels conversion. SUBSTANCE: method consists in pyrolysing up to 30-80% of solid fuel carbon at 450-600 C with intensive evolution of heat up to 250-600 kcal/kg depending on extent of pyrolysis. Remaining part of carbon is gasified with oxygen or oxygen-steam mixture, or burned with high summary heat balance and no formation of tarry or liquid by-products with "internal" impurity control to produce high- quality fuel gas in amounts permitting use of gas in power production system with "common" gases. EFFECT: improved known large-scale power production methods under environmentally safe conditions. 6 cl, 3 tbl
