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The dispatching in electrical systems always has to face the problem of instantaneous balance between produced power and consumed power. In recent decades, with the advent of distributed generation, especially from non-programmable renewable sources, dispatching has become increasingly more difficult, and more and more attention was paid to the opportunity to limit the imbalances between foreseen...
This paper proposes a cost-effective solution useful to remotely control via Internet a nanogrid. The effectiveness and the goodness of the proposed solution is demonstrated in a laboratory setup using a 1kW single-phase nanogrid prototype. A development board Atmel EVK1100 is used to generate the PWM signals that force the IGBTs of all power converters belonging to the nanogrid. A single-board computer...
The spread of Renewable non-dispatchable sources represents a new challenges for the electrical power system. The unpredictability of generation profiles caused the necessity to compensate the fluctuations of power, also using storage system. Storage system can be utilized to make Renewable Energy Sources more dispatchable, but their utilize solely for this purpose can be non-economical convenient...
Design and build dc nanogrids is not an easy task, even in an experimental campaign in the laboratory. A crucial point is the control of the bidirectional ac-dc converter, which joins the dc nanogrid to the utility grid. In this frame, the paper illustrates how control a 22.8kVA IGBT three-phase inverter, model Semiteach by Semikron, via an evaluation/developing board, model EVK1100 by Atmel. PWM...
Facing the challenge to better manage the electrical systems, the paper presents an energy management model called Power Cloud, applied to an energetic community composed of producers/prosumers from renewable not programmable resources and consumers. Thanks to this model, the users belonging to the community can share the renewable energy resources, reducing energy supply prices, while they have a...
This paper focuses on a typical customer with a PV plant and a battery storage by the perspective of two EU members: Italy and Spain. The authors calculate the electricity bill of the considered customer in accordance with the respective legislative and regulatory frameworks. This calculation is a preparatory and preliminary activity for finding relevant differences, if any, that should not exist...
In the context of grid-connected prosumers with an integrated photovoltaic-battery system, imbalance is the difference between the hourly net energy measured at the point of delivery and the associated forecast. Besides contributing with the increasing of the self-consumption, batteries can also compensate for imbalances if opportunely operated. This paper proposes two strategies to operate batteries...
Ethological communication permits the exchange of context-specific information among mammals. In recent literature, many investigations have been performed on behavioral responses but little is known about neurophysiological pattern activation. In this study we investigated neuron patterns in response to ultrasound vocalizations, mapping the auditory cortex in order to find the specific activation...
The increase of renewable non-programmable production and the necessity to locally self-consume the produced energy led to utilize ever more storage systems. To correctly utilize storage systems, an opportune management method has to be utilized. This paper implements a multi-period management method for storage systems, using different management strategies. The method aims to minimize the total...
On the basis that a processing resource optimally calculates the loads scheduling one day-ahead for those prosumers operating in a demand response program, the question is: who acts the scheduling? This paper presents an electronic device named Smartbox as a low-cost and feasible home automation solution; so, given a processing resource which optimally calculates the loads scheduling one day-ahead,...
The increase of renewable non-programmable production and the necessity to locally self-consume the produced energy led to utilize ever more storage systems. To correctly utilize storage systems, an opportune management method has to be utilized. This paper implements a multi-period management method for storage devices, using different management strategies. The method aims to minimize the total...
This paper is focused on a single phase shunt active filter based on detection of harmonic voltages at the point of installation; the mission of the active filter is to eliminate these harmonic voltages implementing a repetitive-based control. The active filter is a single-phase voltage-controlled voltage source inverter controlled so to generate a harmonic voltage in phase with the one detected at...
In this paper we investigated neural activation by means of electrical impulses delivered along the auditory pathway in rats. The pulsed electrical signals, generated by a bio-inspired sonar system and processed by an electronic interface, were used to stimulate the amygdala, the inferior colliculus and the auditory cortex. We modulated the neural activity through different signal patterns related...
Thanks to recent innovations driven by European Union and national policies, lately it has been possible to see the realization of effective renewable energy technologies, for both large and small-scale use, alongside considerable cost reductions for customers. As a result, businesses and households can increasingly produce and consume, some or all, their own electricity, either instantaneously or...
The current on the low voltage side of the high frequency transformer of a dual active bridge converter is subject to rapid rising and falling edge; in designing the converter, the peak current is a key factor to achieve robustness and reliability. To limit the peak current, the adoption of a further inductor in series with the transformer is a feasible solution. In this paper the authors propose...
This paper proposes an innovative management strategy for a stormwater detention tank, whose main function is to prevent the risk of flooding in urban environment due to intense rainfall events. In the moments when the tank is not required to carry out its main function, the proposed use involves the operation of the tank as energy storage system, thanks to the introduction of a pump/turbine group,...
The paper presents an application of a dual active bridge DC-DC converter for a smart user network that is a microgrid with a DC-powered local network (or DC bus). In such a microgrid the DC-DC converter connects a battery energy storage system to the DC bus. In a previous paper, the authors demonstrated that the DC-DC converter is able to assure a stable DC bus voltage to a reference value; performance...
Hearing loss is one of the most common neural impairments and is usually due to damage to peripheral structures. The insertion of a specific electronic interface along the auditory pathway, bypassing the area of peripheral damage, can at least partially reactivate the auditory faculty. Herein, a rat brain stimulation technique based on an ultrasound system is presented. The complete system consists...
The increase of small size generation systems may cause congestions, hitherto unexpected, on the distribution network. To reduce the impact of congestions, the use of storage systems is one of the main countermeasure. In the paper, a storage management strategy based on a local energy market is proposed, in order to maximize the utility of an users community in which local market takes place. The...
The paper presents a dual active bridge converter, i.e. an isolated bidirectional DC/DC converter composed of two full-bridge DC/AC converters and an isolation high frequency (HF) transformer, useful for application in a DC-powered microgrid. The dual active bridge converter connects a battery energy storage system to a DC bus so to provide a high level of reliability and resilience to grid disturbances...
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