Synchronous Condenser Device to Enhancement HVDC System on Weak Grids Connected to High Renewable Energy Penetration: A Review

The high integration of renewable energy replacing conventional synchronous power plants connected to the power AC grid has been a challenge in recent years. Lack of inertia system and reactive power support impacts frequency stability and the system is vulnerable to fault level disturbances so the AC system becomes weak. HVDC connected to a weak AC system has issues with stability and reliability. This paper discusses a review of improving a weak AC system connected to an HVDC system using a synchronous condenser power compensation device. From various reviews, the application of using synchronous condensers is presented to overcome disturbances and faults. Synchronous condensers can provide inertia, and generate reactive power into the system. Adding a synchronous condenser to a weak system can be a solution to reinforce the HVDC system. This paper also briefly explains HVDC technology, the short circuit ratio value as an indicator system is categorized as strong or weak system.