Fault Ride Through and Intermittency Improvement of Renewable Energy Integrated MMC-HVDC System Employing Flywheel Energy Storage

Modular multilevel converter (MMC)-based high voltage direct current (HVDC) transmission networks integrate remotely located distributed renewable energy resources (RER). The intermittent nature of RER and symmetrical asymmetrical AC-side low-voltage faults produce operational difficulties. It reduces the MMC’s ability to transfer rated power, which raises HVDC link. Therefore, MMC-HVDC network’s fault ride-through (FRT) capabilities power fluctuation brought on by intermittency are potential challenges efficient integration resources. In response, this article suggests an control scheme for flywheel storage PV-wind-MMC-HVDC system in order regulate HVDC-link during low at point common coupling (PCC) AC grids address problem caused sudden load changes. suggested method eliminates dynamic braking resistor (DBR) from link seamlessly integrates without actively reducing faults. To test effectiveness proposed excess link, have been conducted. addition, changes wind speed, solar radiation, temperature made validate management system’s performance. A real-time digital simulator (RTDS) dSPACE-based controller hardware loop (CHIL) configuration with a complete used simulate evaluate entire system.