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In the smart grid and smart city context, the energy end-user plays an active role in the operation of the power system. The rapid penetration of Renewable Energy Sources (RES) and Distributed Energy Resources (DER) requires a higher degree of flexibility on the demand side. As commercial and Industrial buildings (C&I) buildings represent a substantial aggregation of loads, the intertwined operation...
Contactors and adjustable speed drives (ASDs) are power devices that are commonly used in many industrial processes. A contactor is used for switching and/or protection while an ASD is used for process control. These power devices are vulnerable to voltage dips that can disrupt the whole process, and cause huge economic losses. The economic loss of a process depends on the number of process interruptions...
Penetration of distributed renewable energy sources in low-voltage (LV) networks is increasing steadily. This trend helps the vision of sustainability, but it is hindered by various economic and technical constraints. Some of the existing solutions put some customers in a disadvantageous position, which is often overlooked while developing technical solutions. In this paper, the most common solutions...
The increasing introduction of district heating systems together with hybrid energy appliances as heat pumps and micro-combined heat and power installations, results in new opportunities for optimizing the available resources in multi-commodity smart energy systems, including electricity, heat and gas. By ‘converting’ forms of energy using hybrid energy appliances, and exploiting flexibility from...
Increasing share of distributed renewable energy sources (DRES) in the distribution network raises new operational and power quality challenges like overvoltage in the network feeders. Such power quality challenge limits the penetration of DRES in the distribution network. This paper addresses a communication independent droop control, a communication dependant fast control and proposes an integrated...
Within the smart cities concept, smart buildings and smart grids have emerged as crucial solutions to increase energy efficiency, without jeopardizing the main objectives of such systems. As the power system go through the transition from a “centralized” and “vertical” structure, to a “decentralized” and “horizontal” one, its different building blocks need to guarantee energy efficiency and sustainability...
The power system is moving into the new era of Smart Grid with the help of advance ICT and other developed technologies. These advancements made the demand response as an integral part of power and energy systems. Nowadays, the concept of Energy bidding is emerging in the Market-based Demand Response. In order to cope the anticipated challenges of bidding strategies and load scheduling, the decentralized...
Though the built environment represents a considerable amount of the total energy demand in cities, building operation still causes higher energy consumption than needed. Meanwhile, building's on-site generation has not been coupled properly with the building energy management system (BEMS). The supply demand problem is addressed in the energy management and becomes highly complex with the introduction...
In the context of the smart grid, scheduling residential energy storage device is necessary to optimize technical and market integration of distributed energy resources (DERs), especially the ones based on renewable energy. The first step to achieve proper scheduling of the storage devices is electricity consumption forecasting at individual household level. This paper compares the forecasting ability...
This paper presents the results of the analysis on the influence of different RMS calculation methods to the detection and characterization of voltage dips. The analytical calculation of measurement parameters for voltage dips and the systematic deviations in characterization due to the dip detection algorithms are discussed for the general RMS calculation methods, sliding window and half cycle methods...
Power Quality (PQ) disturbances are becoming increasingly important concerns of the network operators and customers during the delivery of power. Voltage dip is one of the PQ disturbances which is caused by different factors but mainly by the unpredictable faults occurring at different parts of the electrical network. Dips originating at some parts of the network may propagate to other parts of the...
Modelling and simulation are important tools that have novel applications in all engineering disciplines because they combine engineering and technology. Large systems that involve different domains can be modelled and integrated. This approach facilitates modelling and simulation of complex real-world systems. As residential heating systems become electrified, their contribution to the residential...
AC Power systems have to continuously balance generation and consumption in order to maintain a stable system frequency. The mismatches between the electricity generated and consumed have to be compensated by means of ancillary services, usually provided by conventional power plants. However, the recent developments in power distribution and automation will allow some of those services to be provided...
Current developments in generation portfolios and market design urge the need to attract additional balancing services in the form of frequency restoration reserves (FRR). This work elaborates on the opportunities and constraints of current balancing markets in the Netherlands and Germany to harness the profitability and feasibility of energy storage systems to participate in load-frequency control...
Increasing levels of wind power generation in the coming years will displace conventional generation, impacting the need for balancing reserves. The upcoming integration of pan-European balancing markets seeks to increase collaboration between areas for optimal provision of services. The challenge of increased variability due to wind and other renewables could be tackled by the exchange of balancing...
This work provides a method for combined planning of a possible offshore grid in the North Sea together with the onshore grid, for a high renewable energy scenario in the year 2030. The analysis is done with the help of both market simulations and load flow calculations. The round-the-year security analysis is used to evaluate different offshore grid structures and the interdependencies that exist...
Merging advanced control and information and communication technology (ICT) technology with the power grid is an appropriate approach for realizing the promising potential of massive distributed energy resources (DERs) integration, that is necessary for the vision of a sustainable society. This paper introduces a storage integrated photovoltaic (S-PV) system at residential areas as a multiple objective...
Building Energy Management Systems (BEMS) have been introduced in the built environment as a mechanism to increase the energy efficiency while maintaining the required comfort levels. BEMS also offers promising flexibility for Demand Side Management and Demand Responses (DSM&DR) to interact with Smart Grids. Through the use of intelligent control techniques, BEMS can be optimized to exploit the...
The intermittent nature of wind flow hinders the effective prediction of wind power generation, causing imbalances between the estimated and the actual values. Therefore, large-scale integration of wind generation is limited by its consequences to the whole system. This paper focuses on a two-step approach to mitigate the imbalance caused by the integration of wind energy sources in the electric grid...
Load forecasting is an important operational procedure for the electric industry particularly in a liberalized, deregulated environment. It enables the prediction of utilization of assets, provides input for load/supply balancing and supports optimal energy utilization. Current residential load forecasting is mainly based on the use of synthetic load profiles due to lack of or insufficient historical...
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