Cyber-physical framework for emulating distributed control systems in smart grids

This paper proposes a cyber-physical framework for investigating distributed control systems operating in the context of smart-grid applications. At the moment, the literature focuses almost exclusively on the theoretical aspects of distributed intelligence in the smart-grid, meanwhile, approaches for testing and validating such systems are either missing or are very limited in their scope. Three aspects need to be taken into account while considering these applications: (1) the physical system, (2) the distributed computation platform, and (3) the communication system. In most of the previous works either the communication system is neglected or oversimplified, either the distributed computation aspect is disregarded, either both elements are missing. In order to cover all these aspects, we propose a framework which is built around a fleet of low-cost single board computers coupled with a real-time simulator. Additionally, using traffic control and network emulation, the flow of data between different controllers is shaped so that it replicates various quality of service (QoS) conditions. The versatility of the proposed framework is shown on a study case in which 27 controllers self-coordinate in order to solve the distributed optimal power flow (OPF) algorithm in a dc network

Cyber-physical framework for emulating distributed control systems in smart grids

WOS:000488997400016This paper proposes a cyber-physical framework for investigating distributed control systems operating in the context of smart-grid applications. At the moment, the literature focuses almost exclusively on the theoretical aspects of distributed intelligence in the smart-grid, meanwhile, approaches for testing and validating such systems are either missing or are very limited in their scope. Three aspects need to be taken into account while considering these applications: (1) the physical system, (2) the distributed computation platform, and (3) the communication system. In most of the previous works either the communication system is neglected or oversimplified, either the distributed computation aspect is disregarded, either both elements are missing. In order to cover all these aspects, we propose a framework which is built around a fleet of low-cost single board computers coupled with a real-time simulator. Additionally, using traffic control and network emulation, the flow of data between different controllers is shaped so that it replicates various quality of service (QoS) conditions. The versatility of the proposed framework is shown on a study case in which 27 controllers self-coordinate in order to solve the distributed optimal power flow (OPF) algorithm in a dc network

Adaptive Sensorless SM-DPC of DFIG-Based WECS Under Disturbed Grid: Study and Experimental Results

WOS:00042868740000

Evaluation of loss effect on optimum operation of variable speed micro-hydropower energy conversion systems

WOS:000449892600091International audienceThis paper evaluates the effect of converter and generator losses on the maximum power point (MPP) of variable speed micro-hydropower energy conversion systems. As a case study, a semi-Kaplan micro-hydropower turbine with a permanent magnet (PM) generator and a back-to-back full converter is considered. Using the analytical model, different loss terms, such as converter losses, PM generator losses and mechanical losses are calculated at different shaft speeds. Then, the curves of turbine power and injected power to the grid are extracted as a function of turbine speed. It is shown that the maximum attainable power of the variable-speed hydropower system does not correspond to the MPP of hydraulic turbine. In other words, to get the maximum power from the whole hydropower system, it is necessary to consider power losses of the electric generator and power electronic interface between the turbine and the grid. These power losses can change the power-speed characteristics or MPP location of the hydropower system. According to this fact, the conventional MPP tracking (MPPT) algorithms which try to track the MPP of hydraulic turbines fail to extract the maximum power. Hence, a modified perturb and observe (P&O) MPP tracking algorithm is proposed for the variable speed hydropower systems to increase their efficiency. The modified tracking algorithm finds the “optimum MPP” automatically and without the extra calculations. Also, the injected power to the grid is increased 3.7% when the modified algorithm is applied to the studied case study. Finally, the validity of theoretical claims is verified by experimental tests on a 5 kW hardware prototype

Bonnes pratiques en écoconception de service numérique: Incontournables pour diminuer de façon drastique les GES, elles font l’objet d’un guide. On en découvre la genèse.

National audienceEcoInfo, un collectif qui comprend des ingénieurs, des chercheurs et des enseignants-chercheurs des secteurs de la recherche et de l’enseignement supérieur, propose notamment la production d’un guide de Bonnes pratiques en écoconception de service numérique, dont la dernière version a été publiée en mai 2023. On vous en présente ici les grandes lignes

Bonnes pratiques en écoconception de service numérique: Incontournables pour diminuer de façon drastique les GES, elles font l’objet d’un guide. On en découvre la genèse.

National audienceEcoInfo, un collectif qui comprend des ingénieurs, des chercheurs et des enseignants-chercheurs des secteurs de la recherche et de l’enseignement supérieur, propose notamment la production d’un guide de Bonnes pratiques en écoconception de service numérique, dont la dernière version a été publiée en mai 2023. On vous en présente ici les grandes lignes

Bonnes pratiques en écoconception de service numérique: Incontournables pour diminuer de façon drastique les GES, elles font l’objet d’un guide. On en découvre la genèse.

National audienceEcoInfo, un collectif qui comprend des ingénieurs, des chercheurs et des enseignants-chercheurs des secteurs de la recherche et de l’enseignement supérieur, propose notamment la production d’un guide de Bonnes pratiques en écoconception de service numérique, dont la dernière version a été publiée en mai 2023. On vous en présente ici les grandes lignes

Novel Adaptive Controller for Effective Magnetic Measurement Under Arbitrary Magnetization

International audienceAbstract—In the context of the ever-expanding applicationof soft magnetic materials, the fully controlled magneticmeasurement has, therefore, become essential. Itensures not only the accurate modeling of materials butalso the rigorous quality control throughout the manufacturingprocess, as well as the explicit communication ofmagnetic data in academic studies or between suppliersand customers. Due to the non-linearity and hysteresisnature of electrical steels, automatic flux density controlleris required for high standard measurements. We proposein this paper a novel steady-state digital control algorithmwith two loops, one to regulate amplitude and the other tocorrect waveform of the flux density. Measurement resultsfor various samples tested by Epstein frame and ring specimensunder different waveforms, a wide range of frequencyand high amplitudes of the flux density have proven thehigh adaptability, accuracy and convergence speed of thiscontroller. Its principle is discussed in details, together withthe employed measurement bench

Bonnes pratiques en écoconception de service numérique: Incontournables pour diminuer de façon drastique les GES, elles font l’objet d’un guide. On en découvre la genèse.

National audienceEcoInfo, un collectif qui comprend des ingénieurs, des chercheurs et des enseignants-chercheurs des secteurs de la recherche et de l’enseignement supérieur, propose notamment la production d’un guide de Bonnes pratiques en écoconception de service numérique, dont la dernière version a été publiée en mai 2023. On vous en présente ici les grandes lignes

Bonnes pratiques en écoconception de service numérique: Incontournables pour diminuer de façon drastique les GES, elles font l’objet d’un guide. On en découvre la genèse.

National audienceEcoInfo, un collectif qui comprend des ingénieurs, des chercheurs et des enseignants-chercheurs des secteurs de la recherche et de l’enseignement supérieur, propose notamment la production d’un guide de Bonnes pratiques en écoconception de service numérique, dont la dernière version a été publiée en mai 2023. On vous en présente ici les grandes lignes