Abstract

The introduction of renewable energy sources in remote island regions is difficult due to the small capacity. To improve this issue, grid expansion and control of energy storage systems are needed. This paper proposes a MMC-MTDC smart grid and control strategy for it to expand remote island areas grid. Multiple remote islands are linked by IIVDC transmission lines to form a smart grid with renewable energy sources and energy storage systems. Depending on the power balance, recharge/discharge of storage batteries, MPPT control and output suppression of renewable energy sources are performed. Simulation results under power imbalance and fault conditions show that the proposed system operates stably.

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