###### Abstract
The distributed energy system (DES) combined with the microgrid is widely used in the power-generation systems of renewable energy [7; 8] because it is a regional small power grid that can coordinate with the intermittency of renewable energy and coordinate all units in the system, which include the renewable energy generator sets, small fuel generator sets, power storage equipment, and energy management systems, to stabilize voltage and frequency. The microgrid of DES is characterized by the fact that the generating units are distributed near users. Unlike traditional power generation, which requires multiple transformations and long-distance transportation, it can reduce the loss of power transmission as well as the transmission load of the main grid and improve the peak and valley load of the power grid [9; 10]. In addition, the energy management system in the DES can coordinate and manage all generator sets, which were originally distributed, to improve the reliability and safety of users' electricity and can also adjust the output power of each generator set to provide a different strategy of power supply [6]. The microgrid of DES can effectively improve the efficiency of energy use, reduce environmental pollution, and at the same time realize energy saving and carbon reduction; however, the global electricity demand still mainly relies on traditional thermal power generation such that its energy conversion rate is between 35% to 50% and its disadvantages include long-distance transportation of electric energy through the main grid, resulting in additional energy loss during the transportation process, a large amount of waste heat, and the emission of greenhouse gases during the power-generation process, causing environmental pollution and global warming, and about half of the energy is lost due to waste-heat emissions [11]. Thus, the combined cooling, heating, and power system (CCHP), which adds gas-turbine generators and absorption refrigeration equipment based on the distributed energy system, has been widely promoted and researched in recent years in order to improve the overall energy conversion rate [12]. The recovery of waste heat generated during power generation by gas-turbine generators can not only use the recovered waste heat to meet thermal needs, such as hot water and high-temperature steam, but also convert heat energy into cold energy through absorption refrigeration equipment to meet the users' cold energy needs, such as air conditioning systems. Therefore, the energy conversion rate of CCFP theoretically reaches up to about 90% [13]. Countries all over the world are pursuing the concept of sustainable operation with the rising awareness of environmental protection; hence, how to apply CCFP to generate electricity while achieving energy saving and carbon reduction is an important research topic, which led to this study. Most of the research on CCFP is limited to construction, such as hotels and hospitals [14; 15], and there are few discussions on a larger scale of CCFP such as for the scope of a community or for larger settlements such as villages and towns because the development of CCFP must take into account factors such as energy prices, the subsidy policies of the government, etc. Thus, CCFP largely faces the test of economic cost and many insurmountable cost issues that limit its development. However, the promotion of CCHP is necessary to solve the problem of global energy depletion. Therefore, this work studied CCHP based on Xikou village, Lieyu township, Kinmen county, Taiwan, where the Taiwan government's promotion of the development of outlying island microgrids and renewable energy and the implementation of the Kinmen low-carbon island project coincide, as an experimental case. It has the advantage of a government subsidy policy and is currently the highest-potential area in Taiwan to realize the CCHP-combined-with-microgrid system of renewable energy [16].