Integrating DG units close to final consumers could reduce losses to distribution networks, but the structure of the DG units needs to be adapted to local demand as the reliability of these networks could be affected by the high integration of RES power supply, which may lead to the overloading of existing elements and other voltage violations. The power supply on these islands is completely dependent on diesel power and RES on site. Due to geographical distance and other natural conditions, most of the networks on these islands are not connected to the national electricity system. The islands are now considered to have a strategic role in the socioeconomic development and defense-security assurance of Vietnam, and therefore, it is essential to establish a solid infrastructure for sustainable development on them, especially for energy security. The NEPLAN environment was selected for simulation and analysis for all the scenarios in this study.
Moreover, several solutions to enhance the reliability of this grid are also proposed. The findings from this study suggest that choosing the right structure of the power mix could contribute to improving the operational security of isolated networks. For this reason, this study aims to contribute to a better understanding of integrating renewable energy into isolated networks, and in this case, using solar power for the An-Binh Island grid in Vietnam. Another challenge is that the issues of the operational security of these systems could also be negatively affected by the variable nature of renewable sources, including static and dynamic security. The issues of reliability and vulnerability of these networks are not given the expected attention. However, the use of these energy sources in Vietnam’s isolated networks is still facing many challenges due to its infancy here. Over the years, many isolated networks using renewable energy sources have been deployed for off-grid areas in Vietnam.
Renewable electricity for off-grid areas is widely seen as one of the top choices in supporting local economic development in most countries, and so is Vietnam.
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