Abstract
The full electrification of ports is a promising prospect for saving energy and reducing greenhouse gas emissions. The control scheme of the reefer container is particularly important for the energy management of the port, as the operation of the reefer container is one of the main energy consumers of ports. This paper proposes a reefer container hierarchical control scheme that contains a day-ahead module and intra-day module which is used to generate a rough scheduling strategy based on forecast data and fine-tuning the strategy, respectively. The final strategy should realize the economical operation while ensuring that each reefer container does not exceed the temperature limit during operation. Numerical analysis on the reefer container park with 200 and 850 containers using the Time of Use (TOU) tariff and super-peak tariff is fully analyzed. In the case of 200 containers, the proposed method helps reduce operating costs by about 14.7%, and 18% in the scenario of 850 containers. The proposed method can effectively save container operating costs and ensure that the internal temperature of the container does not exceed the limit while changing the distribution of energy which could help alleviate the peak load problem of the port electric system.
Highlights
Introduction of DayAhead Module and Intra-Day ModuleApart from the emergency control module, the other two modules require energy management methods to support the realization of module functions
The intra-day adjustment module could fine-tune scheduling strategies based on real-time environmental information. (c) In order to deal with communication failures, the reefer container park must be equipped with emergency control modules, to ensure the stability of the internal temperature of the container even when real-time information
The Day-ahead module (DA) and Intra-day module (ID) module takes into consideration the impact of real-time electricity prices and the total power limit of port containers, which helps the regulator of the port reduce the operating costs by approximately 14.7% per day compared to the emergency control
Summary
As mentioned in the introduction, refrigerated containers are the major flexible loads of future ports. The proposed method enables real-time control of port flexible loads and effectively reduces their operation cost. The intra-day adjustment module could fine-tune scheduling strategies based on real-time environmental information. (c) In order to deal with communication failures, the reefer container park must be equipped with emergency control modules, to ensure the stability of the internal temperature of the container even when real-time information. Energies 2021, 14, x FOR PEER REVIEW cannot be obtained, or control signals cannot be transmitted
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