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Environmental concerns and European policies push for more energy efficient buildings, towards the goal of Nearly Zero Energy Buildings (nZEBs), buildings with an high efficiency and for which the low amount of energy required for the fixed technical systems (TBS) is covered by energy from renewable sources produced on-site. Innovative technical solutions and social/economic schemes are key elements...
Power stability based on energy storage systems to share the load between distributed generations (DG) in island mode is the main issue in the microgrids (MGs). Stability is an important component in energy management and planning of MG. At the first part of this article, definitions and stability issues classification are presented. In this article, power control based on active power method is analyzed...
This paper presents an output power smoothing method by a coordinate control of machine side converter and grid side converter for permanent magnet synchronous generator (PMSG) based wind energy conversion system (WECS). The WECS adopts medium voltage source converter with AC-DC-AC configuration. The output power fluctuations are compensated using direct torque control based maximum power point controller...
Total transfer capability analysis of power system is currently a critical issue in both planning & operating of systems. These issues mainly occur due to increase in area and interchanges among utilities. To reduce the flows in heavily loaded lines, Flexible Alternating Current Transmission System (FACTS) devices is used, this results in increased transfer capability, improve stability of the...
In the modern power system, characterization of customer's demand plays a vital role for Demand Side Management. Demand flexibility information, extracted from the aggregate demand behaviour of customers, presents more comprehensive picture for the aggregator or system operator. There is an existence of diverse flexible time slots during a day in different time periods. Due to the diverse energy consumption...
It is well known that the control of energy consumptions in a building or in an organization enables to improve the energy performance (EP). The measurement plan defines the procedure for the design, deployment, utilization, maintenance and improvement of a distributed measurement and monitoring system (DMS). A DMS is able to measure and analyze the EP of the organization according to factors that...
Energy Efficiency is one of the cornerstones of European and International energy policy. Technical standardization can contribute to promote energy efficient technologies and solutions and ultimately to reach the targets of energy efficiency improvement and CO2 reduction. This paper provides an overview of the main existing technical standards in the domain of energy efficiency measurement and monitoring...
The standards related to energy management emphasize the role of the measurement activity but no exhaustive guidelines have been published for outlining requirements and architecture of a comprehensive energy efficiency monitoring system that goes beyond a simple measuring system. A Monitoring System for Energy Efficiency should transform several kinds of energetic and context data into actionable...
Net metering is used to incentivize the distributed generation owners. It is introduced in Pakistan with the aim to promote the building integrated local generation. Presently, it is hard to find any study on the economic incentive indicators of the net metering policy for residential customers in Pakistan. This paper presents the economic evaluation of net metering benefits to the individual residential...
Buildings with mixed residential and commercial units show relevant power peak that re further enhanced by shifting to electric source of nowadays gas-driven systems. The proposed solution is to organize a microgrid for such kind of buildings, aggregating different users with a common electric distribution system with a unique connection to the grid, a local common generation and a common heating/cooling...
The paper presents a feasible model of architecture for the technical building systems (TBS) particularly suitable for Nearly Zero Energy Buildings (NZEBs). NZEBs are buildings where the energetic consumption are optimized by means of solutions that drastically reduce both electric and thermal demand, while residual required energy has to be provided by local renewable generation. The suggested model...
Due to the increasing amount of energy consumption and CO2 emissions, Building Automation Systems have been developed in order to increase energy performance in buildings and guarantee indoor comfort at the same time. However, along with the development of the hardware itself, the need to develop also suitable control systems and methods for improving the management of smart buildings, is arising...
This paper introduces a characterization of a single Grounding System (GS) or a set of interconnected GSs, according to their safety level and defines their condition of “conventionally safe” and “intrinsically safe”. GSs or a set of them are intrinsically safe, if they guarantee safe touch/step voltages permanently permissible for an assigned ground fault value. It is proposed a new definition of...
This paper developed a novel quad-inverter configuration for multilevel six-phase asymmetrical open-winding AC converter. Proposal found to be suited for (low-voltage/high-current) applications such as AC tractions and ‘More-Electric Aircraft’ propulsion systems. Modular power circuit comprises of standard four three-phase voltage source inverter (VSI) and each connected to the open-end windings....
In spite of the strong believes, the progress and maturity in the deployment of smart grids is very slow. The main reasons behind the slow pace are not due to the technical aspects but, perhaps, as a result of an inappropriate business model, not adequately centered to the customers. Nature, with ability to survive and resist, is a splendid example of competitive life. Mathematical models show that...
Distributed Generation (DG) brought new challenges for protection engineers since standard relay settings of traditional system may no longer function correctly under the new conditions of DG. The extreme case is coordination loss between primary and backup relays. The directional overcurrent relay (DOCR) which is the most implemented protection device in the electrical network also suffers performance...
This paper presents the control strategies by Proportional-Integral (P-I) and Fuzzy Logic (FL) for a DC-DC boost power converter for high output voltage configuration. Standard DC-DC converters are traditionally used for high voltage direct current (HVDC) power transmission systems. But, lack its performances in terms of efficiency, reduced transfer gain and increased cost with sensor units. Moreover,...
This paper presents an easily implementable load control strategy aimed at managing shiftable loads in residential buildings, possibly equipped also with centralized storage and generation facilities. The algorithm is compliant with the KNX standard for communication of smart home devices, and ensures the controlled reduction of power peak profiles. Simulation results are discussed in details, comparing...
A zero-energy building can be defined as a building with almost zero net energy consumption. This means that the total amount of energy spent in the building in a year is approximately equal to the amount of energy generated on the site by renewables or cogeneration. A smart meter system is very important for these buildings in order to manage and control the energy flows. In fact, the smart meter...
At present, buildings account for a great share of energy consumption. It is well known that building automation control systems allow for increasing opportunities of improvement in the performance of buildings, with respect to e.g. energy performance and indoor comfort. As system within a building become more and more complex, buildings can be regarded not merely as a load but as a smart micro grid,...
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