Abstract The Mauritius Long Term Energy Strategy targets 35% of electricity generation from renewables by 2025. This work presents the modeling of the Mauritian energy system in the EnergyPLAN software to identify and gain insights into the major technical challenges involved to achieve that target. Based on simulation of alternative scenarios, it is shown that if solar PV is to be the main source of renewable energy by 2025, operation of the conventional generation fleet at very low levels (20–30% of instantaneous demand) and high ramping requirements become indispensable to avoid significant curtailment and meet the net load. Alternatively, the use of AC-coupled battery energy storage for curtailment reduction was found to be economically unviable due to low utilization. Curtailment to increase solar PV penetration was found to be effective as allowing a modest curtailment rate increased penetration significantly. Consequently, new policy implications are derived. First, it is vital that the generation expansion planning methodology prioritize generation flexibility requirements. Second, the techno-economic feasibility of using DC-coupled Solar plus storage should be investigated as it circumvents the grid stability problem. Third, an effective curtailment policy should be formulated to optimize the contribution of solar PV in the national electricity mix.

中文翻译：

---

对毛里求斯长期能源战略技术挑战的新见解

摘要 毛里求斯长期能源战略的目标是到 2025 年 35% 的发电量来自可再生能源。这项工作展示了 EnergyPLAN 软件中毛里求斯能源系统的建模，以识别和深入了解实现该目标所涉及的主要技术挑战。基于替代情景的模拟表明，如果到 2025 年太阳能光伏成为可再生能源的主要来源，那么传统发电机组在非常低的水平（瞬时需求的 20-30%）和高爬坡要求下的运行将成为避免大幅弃电和满足净负荷必不可少。或者，由于利用率低，使用交流耦合电池储能来减少限电在经济上是不可行的。发现限制增加太阳能光伏渗透率是有效的，因为允许适度的限制率显着增加渗透率。因此，产生了新的政策含义。首先，发电扩展规划方法优先考虑发电灵活性要求是至关重要的。其次，应该研究使用直流耦合太阳能加存储的技术经济可行性，因为它可以规避电网稳定性问题。第三，应制定有效的限电政策，优化太阳能光伏在国家电力结构中的贡献。应研究使用直流耦合太阳能加存储的技术经济可行性，因为它可以规避电网稳定性问题。第三，应制定有效的限电政策，优化太阳能光伏在国家电力结构中的贡献。应研究使用直流耦合太阳能加存储的技术经济可行性，因为它可以规避电网稳定性问题。第三，应制定有效的限电政策，优化太阳能光伏在国家电力结构中的贡献。