Large building facilities towards energy transition

Received: February 10th, 2023 ; Accepted: May 28th, 2023 ; Published: July 6th, 2023 ; Correspondence: [email protected] buildings complexes present significant amounts of energy consumption. Sport centers compose a more special case of large volume buildings, compared to other facilities. This is related not only to the specific requirements of the thermal environment regarding the type of activities taking place as well as the considerable loads enforced by the presence of people. The aim of this paper is to evaluate the energy consumption of a Sports center, through energy audits, extract energy baselines and propose energy-saving interventions and RES utilization. More precisely, a cost-benefit analysis will be carried out to assess the energy production and the relevant contribution of the potential energy interventions. As a result, the priority list of proposed measures will be extracted, with all the data regarding energy gains, capital costs, and cash flows. Particularly, a capital budgeting analysis of each measure will support the final decision of a holistic energy approach at the specific building facilities

Sustainable power generation expansion with RES and energy storage

Received: February 10th, 2023 ; Accepted: April 30th, 2023 ; Published: July 6th, 2023 ; Correspondence: [email protected] island power systems have a tremendous protentional for RES use. Nevertheless, present infrastructures and system operations emerge with limitations, preventing the technology from further exploitation. Specifically, this paper presents and analyzes a representative interconnected island power system operation and highlights the benefits and challenges of embedding an ultra-high share of RES. This level of power and energy penetration could be technically feasible, taking into account interconnections and electricity storage systems, which could provide under specific implementation strategies advantages in stability, reliability, and energy adequacy

On-line dynamic security assessment of power systems in large islands with high wind power penetration

This paper describes the application of advancedinductive inference and statistical methods to on-linedynamic security assessment of the Crete island electricpower system. A description of the problem and the dataset generation procedure are included. Comparativeresults regarding performances of Decision Trees andKernel Regression Trees are presented and discussed

Analysis of the financial implications of solar panels and battery storage integration in the port infrastructure of Heraklion

The European Union (EU) aims to significantly reduce greenhouse gas (GHG) emissions by 2050, necessitating an extensive energy transition across numerous industries and economic sectors. Urban ports are a key sector affected by this transition. As ports increasingly adopt electric-powered infrastructure (such as cold ironing, reefers, stackers, and cranes), their reliance on the electrical grid grows, potentially leading to higher operational costs. This creates a challenge of achieving the required transition in a cost-effective manner. This paper addresses this issue by proposing a photovoltaic (PV) and battery installation to meet electricity demands, focusing on determining the optimal system size, cost, and expected earnings. The study utilizes electricity consumption data from the port of Heraklion for 2021 and solar data from a nearby photovoltaic park in Heraklion, Crete. The methodology's results include determining the appropriate PV capacity and battery storage, with an estimated annual profit of €165,818.44

A DC Link-Based Approach to Realize Zero Feed-in under Both Static and Dynamic Power System Events

Two factors significantly limiting the increased inter-connection of distributed energy resources in distribution systems are related with the thermal and the short-circuit limits of the primary substations. Even though the zero feed-in approach can address the limitations originating from the thermal limits, the short-circuit limitation issue can not be tackled by this solution. Hence, the short-circuit limitation of primary substations has evolved as the most critical limiting factor in further increasing the distributed energy resources in the distribution system. To address this issue, a novel solution is proposed in this paper, through a DC-link topology that can maintain the zero feed-in conditions of distributed energy resources, during both static and dynamic power system events. The proposed solution is thoroughly described, validated and compared with the conventional zero feed-in approach through simulations in MATLAB/Simulink. It is shown that it can inherently achieve zero current injection to the grid under a short-circuit, while it offers several other advantages, such as fault ride-through and immunity to several grid voltage disturbances

Dynamic security evaluation functions in the more care project

This paper describes the security assessment functions of anadvanced control system for secure operation of isolated networkswith increased renewable penetration, developed within theMORECARE project. One of the key features of this project isrelated with the capability of assessing on-line dynamic security andproviding preventive control measures that can assure a robustoperation for the system regarding some disturbances.The paper describes with some detail the general approach followedto derive these evaluation functions, which are based in functionalknowledge generated off-line through computational simulation.Techniques like Decision Trees, Artificial Neural Networks andHybrid Regression Trees were successfully exploited and integratedwith other mathematical technical do deal with the problem

On-line dynamic security assessment of isolated networks integrating large wind power production

The paper describes the on-line dynamic security assessment functions developed within the European Union, DGXII programme, CARE. These functions are based exclusively on the application of machine learning techniques. A description of the problem and the data set generation procedure for the Crete island power system are included. Comparative results regarding performances of Decision Trees, Kernel Regression Trees and Neural Networks are presented and discussed.The paper describes the on-line dynamic security assessment functions developed within the European Union, DGXII programme, CARE. These functions are based exclusively on the application of machine learning techniques. A description of the problem and the data set generation procedure for the Crete island power system are included. Comparative results regarding performances of Decision Trees, Kernel Regression Trees and Neural Networks are presented and discussed

Artificial intelligence techniques applied to dynamic security assessment of isolated systems with high wind power penetration

In this paper the application of ArtificialIntelligence to on-line dynamic security assessment ofisolated power systems with increased wind powerpenetration is presented. The developed securityfunctions have been integrated in the dynamic securityassessment module of the advanced control system ofthe island of Crete providing timely warning of insecureoperating conditions with very satisfactory accuracy