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This paper deals with the investigation and economic evaluation of power supply systems in residential buildings with different shares of renewable energy in different years, different regulatory boundary conditions and cost digression estimations. A linear programming approach is selected for the determination of technical and economical capabilities of this energy system. By investigating and simulating...
This paper investigates potential conflicts of interest between distribution system operators (DSOs) and aggregators. We propose a method to quantify the allowed operating range of residential flexible loads in a local distribution network. The calculated bounds can be used to formulate DSO services, tradable on a potential DSO service market platform. Aggregators are considered, concentrating thermostatically...
Nowadays the electricity is very important for humanity, although there are many places worldwide which do not have access to it. Recently decentralization from the grid became more and more popular. In this paper a project about the Renewable Energy Park in Fót will be presented. The Park is a Microgrid, an electricity distribution system that can manage itself and gain power from renewable energy...
an investigation and analysis based on TRNSYS simulation are reported on the performance of a renewable energy system compound of two parts. In the first part (production) we consider a PV/wind hybrid system with battery storage. And in the second part (consumption) we consider a heat pump as HVAC system to insure the thermal comfort and the quality of the air for the occupants in a meeting room....
The article examines the income situation for a waste incinerations plants in the current market design and explains possible, useful expansion options. Subsequently, possible contributions to the stabilization of the energy system are explained.
Frequency Containment Reserves (FCR), previously referred to as primary reserves, are an important component for the safe operation of the Continental Europe grid. The growing share of renewables represents a forthcoming challenge since FCR are generally provided by synchronous generators. In this paper, batteries are associated with a power-to-heat system (P2H) composed of electrical resistances,...
The limited driving range of EVs can highly vary due to the influence of ambient conditions. Recent studies report driving range reductions up to 33 % in extreme heat and up to 60 % in extreme cold conditions. Furthermore, long recharging times of the battery limit the convenient operating range of EVs. Using a holistic energy management approach for electric vehicles, the EU-funded Horizon 2020 project...
One of the biggest barriers towards large scale adoption of electric and plug-in hybrid cars is still range limitation due to limited storage capacity of electric batteries. The air conditioning system for passenger comfort and the thermal conditioning system (battery and powertrain) are main auxiliary consumers in EVs with respect to energy consumption. Therefore, the Horizon 2020 project "OPTEMUS"...
DENSO developed an innovative solution to provide efficient thermal preconditioning in electric vehicles, for both the cabin, offering maximum comfort to the user with low energy consumption, and the powertrain, improving the driving range of the vehicle. The preconditioning strategy exploits the novel concept (using the available energy in the vehicle) in 2 different ways: by getting the trigger...
This paper describes an exemplar precommercial micro virtual power plant ($\mu $ VPP) that has been successfully commissioned and operating since July 2014 in Malmo, Sweden. The embedded home energy management system concurrently manages downstream assets within a typical residential community of multiple apartments and delivers different energy services that benefit both end-users and system operators...
This paper presents an analysis methodology to consider the effects of customer-side battery energy storage systems (BESS) on electricity distribution networks motivated by power-based tariffs. The paper describes the methodology by which the network effects can be defined. The methodology is verified by applying actual distribution network and load data. The analysis shows that transition from traditional...
Novel business concepts utilizing load-flexibility offered by battery storage systems, electric heating and vehicles are emerging. This paper investigates the economic potential of such concepts when applied to households and highlights the view from a German DSO on integrating battery storage into Smart Grids. In this context, a new concept called “virtual metering” is presented, which uses an optimization...
This paper describes a protection scheme for a DC smart grid adapting FRT requirements when a fault occurs in DC distributed line. Recently a smart grid has attracted attention with the introduction of renewable energies. DC distribution system has following advantages over AC conventional systems. For example, renewable energy sources are often DC output. So it is compatible with the DC transmission...
This paper address the issues of surplus power that would happen when the sum of the generated power of Photovoltaic(PV) Generation Systems and minimal output of utility power plant exceeds total electricity demand that would affect the stable operation of power system. The cooperative control of customer's appliances such as Heat Pump Water Heater(HPWH) and battery is applied for utilizing surplus...
A large amount of renewable generation reduces the electric load on conventional power systems especially on a clear day. It results in a decrease in the number of operating thermal power plants. One of the key technologies for ensuring the supply-demand balancing capabilities is the Home Energy Management System (HEMS). In several previous studies, the effects of an HEMS for one house have been evaluated...
The paper proposes a model for the optimization of distributed energy production systems. The systems are based on an Internal Combustion Engine for trigeneration, solar plants and thermal and electric energy storage.
Recently the smart grid has attracted attention with the introduction of renewable energies. The increased attention is due to the prevalent move to reduce the amount of greenhouse gases, which are released into the atmosphere. This paper consider DC smart grid. The DC distribution system has the following advantages over conventional AC systems. Because it is sufficient to control only the voltage...
Energy hub modelling and analysis has garnered a significant degree of attention in the last few years, with different approaches and formalisms being proposed to provide a unified framework for dealing with such systems. The present work is derived from one such approach and presents a numerical analysis of a real world case-study based on the Bilbao Exhibition Centre. The modelling and optimisation...
In this study, an integrated powertrain-thermal energy management strategy (IEMS) was proposed for a power-split type plug-in hybrid electric vehicle. Dynamic models of the powertrain components including the engine, motor/generator, power-split transmission and battery were obtained with a thermal management system consisting of an engine (thermal part), radiator, positive temperature coefficient...
This paper presents the overall economic evaluation of a battery storage in a decentralized energy supply system by means of mathematical optimization methods. The energy supply system, consisting of a battery storage in combination with a photovoltaic system as well as a heat pump with a heat storage and a conventional gas boiler, will be evaluated with regard to technical and economic criteria....
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