Abstract
The power system responsiveness may be improved by determining the ideal size of each component and performing a reliability analysis. This study evaluated the design and optimization of an islanded hybrid microgrid system with multiple dispatch algorithms. As the penetration of renewable power increases in microgrids, the importance and influence of efficient design and operation of islanded hybrid microgrids grow. The Kangaroo Island in South Australia served as the study’s test microgrid. The sizing of the Kangaroo Island hybrid microgrid system, which includes solar PV, wind, a diesel engine, and battery storage, was adjusted for four dispatch schemes. In this study, the following dispatch strategies were used: (i) load following, (ii) cycle charging, (iii) generator order, and (iv) combination dispatch. The CO2 emissions, net present cost (NPC), and energy cost of the islanded microgrid were all optimized (COE). The HOMER microgrid software platform was used to build all four dispatch algorithms, and DIgSILENT PowerFactory was used to analyze the power system’s responsiveness and dependability. The findings give a framework for estimating the generation mix and required resources for an islanded microgrid’s optimal functioning under various dispatch scenarios. According to the simulation results, load following is the optimum dispatch technique for an islanded hybrid microgrid that achieves the lowest cost of energy (COE) and net present cost (NPC).
Highlights
Traditional fossil-fuel-based power plants emit a significant amount of glasshouse gases (GHGs), which are harmful to the environment
An islanded hybrid microgrid with solar PV, wind, diesel generator, and battery storage systems was created for optimal resource planning and reliable operation
The voltage and frequency responses along with the reliability indices are presented in this paper taking the Kangaroo Island microgrid as a test case scenario to identify the best energy dispatch strategy
Summary
Traditional fossil-fuel-based power plants emit a significant amount of glasshouse gases (GHGs), which are harmful to the environment. Solar and wind energy technologies are popular among renewable energy sources, and their participation in grids and microgrids around the world is increasing [1]. Due to the unpredictable and intermittent nature of these resources, operating islanded microgrids with solar and wind energy is difficult. PV and wind generation in a microgrid may lead to short-term stability problems, such as sudden voltage and frequency deviation, which can be worse due to the rapid changes of the load demand [2]. The reliability of a microgrid can be affected by multiple types of generation sources and their coordination [3]. To ensure system stability and reliability, optimal design and optimization of an islanded hybrid microgrid are critical, and they are achieved by assessing the optimal sizing of each component with appropriate dispatch strategies
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