Panxiong Liu
ABSTRACT
The traditional grid-connected integrated energy system is supported by a large power grid, so the unbalanced energy of the system can directly interact with the large power grid, so as to keep the energy of the system in balance. Off-grid integrated energy system Due to the lack of support from the large power grid, all energy comes from the energy conversion equipment inside the system, so it is often necessary to configure a larger capacity energy storage device to balance the energy of the system and improve the stability of the system function. Priority can be given to using solar panels to collect solar energy and convert it into electric energy to power houses. However, access to the power grid requires a high cost. At first, we have created a loss function that assesses the needs of each type of resident. We aimed to maximize the total battery instantaneous and continuous power rating as well as capacity. And minimize the cost to the lowest level. We will ignore round-trip efficiency since the difference between each type of battery is minor. Based on the loss function, we have developed four different types of mathematical models in order to satisfy the needs of different residents. The first model aimed to minimize the cost to the lowest while maintaining other factors at a certain level. The second model aimed to maximize the total continuous power rating to the highest while maintaining other factors at a certain level. The third model aimed to maximize the total instantaneous power rating to the highest while maintaining other factors at a certain level. The fourth model aimed to maximize the total battery capacity to the highest while maintaining other factors at a certain level. The model is optimized and finally a satisfactory result is obtained
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