B777-200
Flight Crew Air Transport Pilot (ATP); Flight Crew Instrument; Flight Crew Multiengine
Flight Crew Total 28850
Situational Awareness
Aircraft Equipment Problem Less Severe; Flight Deck / Cabin / Aircraft Event Smoke / Fire / Fumes / Odor
Air Traffic Control Provided Assistance; Aircraft Equipment Problem Dissipated; Flight Crew Landed in Emergency Condition; Flight Crew Returned To Departure Airport; General Maintenance Action
Aircraft
Approximately 1:20 into flight; a strong electrical burning smell accompanied by unusual noises from the mid galley were reported to the flight deck. This was confirmed by a flight deck crew member. We air interrupted and returned to ZZZ [advising ATC]. The smell confirmed to dissipate after selecting recirculating fans; gasper switch and lFE/seat switches to off. A successful over weight landing was completed in ZZZ. Possible failure of recirculating fans contributing to strong electrical smell with unusual sounds. No suggestion except to say flight deck crew and cabin crew performed duties as true professionals.
B777-200 Captain reported  'strong electrical burning fumes' accompanied by 'unusual noises.' Flight executed an uneventful return to departure airport.