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The design of a highly penetrated hybrid renewable energy system for the Ha'apai Island group.

机译:为Ha'apai岛群设计了一种高度渗透的混合可再生能源系统。

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摘要

Hybrid renewable energy systems (HRESs) have become increasingly popular, especially for isolated regions. This thesis describes the design of a HRES for the isolated Ha'apai Island group in Tonga following a devastating cyclone which happened in 2014. Several renewable power generation and storage possibilities were investigated; solar, wind and battery were found to be feasible for Ha'apai. The conceptual design of a new energy storage system, the Subterranean Ocean Energy Storage System (SOESS), is also discussed as a possible alternative to batteries and a more viable substitute for an ocean renewable energy storage (ORES) system. For the proposed Ha'apai system, the optimum system configuration (solar 450 kW, wind 550 kW, battery 1,216 kAh/4,864 kW) with 90% renewable penetration was obtained using the HOMER software. Based on the optimum system configuration, load flow simulations of both the previous system and the proposed HRES were performed in DIgSILENT PowerFactory. The results of the load flow analysis show that all the transformers and transmission lines in both systems operate safely in both peak and nominal load conditions, and that the voltage levels of all LV buses are within the acceptable range of ±5%. The detailed system topology of the proposed HRES is discussed from the system implementation point of view. A unique set point control algorithm for the start-up/shut-down of the diesel generators was developed. The system dynamic performance was simulated according to the control logic during the three main switching events in DIgSILENT PowerFactory. The dynamic simulation results indicate that the proposed system would operate safely with acceptable voltage and frequency oscillations. This thesis could be used as a template for the design of other isolated HRESs with high renewable penetrations.
机译:混合可再生能源系统(HRES)变得越来越流行,尤其是在偏远地区。本文描述了在2014年发生的毁灭性飓风之后,为汤加孤立的哈帕派岛群设计的HRES。太阳能,风能和电池对哈派来说是可行的。还讨论了新储能系统的概念设计,即地下海洋储能系统(SOESS),它可以替代电池,并且可以替代海洋可再生储能(ORES)系统。对于拟议的Ha'apai系统,使用HOMER软件可获得具有90%可再生渗透率的最佳系统配置(太阳能450 kW,风力550 kW,电池1,216 kAh / 4,864 kW)。基于最佳的系统配置,在DIgSILENT PowerFactory中对先前系统和建议的HRES进行了潮流模拟。潮流分析结果表明,两个系统中的所有变压器和输电线在峰值和额定负载条件下均可安全运行,并且所有LV母线的电压水平均在±5%的可接受范围内。从系统实现的角度讨论了所提出的HRES的详细系统拓扑。开发了一种独特的设定点控制算法,用于柴油发电机的启动/关闭。在DIgSILENT PowerFactory中的三个主要开关事件期间,根据控制逻辑对系统动态性能进行了仿真。动态仿真结果表明,所提出的系统将在可接受的电压和频率振荡下安全运行。本文可作为设计其他可再生能源渗透率较高的孤立HRES的模板。

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    Cao Xueshu;

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  • 年度 2015
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