FIELD: power engineering. SUBSTANCE: connected in series with DC power transmission line is first DC-to-AC converter. Its output is connected to primary winding of first transformer whose secondary winding is connected to second converter which is connected to secondary DC line. Third converter that functions to convert DC to ac power for local supply mains is connected to secondary DC line. EFFECT: reduced cost of power take-off in small to local supply mains. 7 cl, 4 dwg
