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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....
As more and more distributed energy resources (DER) connect to the power grid, ensuring the stability of the power supply is an increasing concern. Accordingly, the present study proposes a hierarchical microgrid operation architecture consisting of an electric vehicle (EV) charging parking lot energy management system (EVCP-EMS) and a smart home energy management system (SHEMS). In the proposed architecture,...
This paper proposes a Model Predictive Control (MPC) scheme to control residential buildings with space heating/cooling loads, an Electric Water Heater (EWH), photovoltaics (PV) and battery storage in a time-varying electricity price environment. The controller uses models for the system components as well as predictions for future disturbances such as weather conditions, occupancy and electricity...
From the perspective of global warming suppression and depletion of energy resources, renewable energies, such as solar collector (SC) and photovoltaic generation (PV), are getting attention in distribution systems. Then, all electric houses with PV and HP are becoming widely used recently because of using time-of-day electricity rate system. If fixed battery can be introduced in the houses, the electricity...
An intelligent building energy system which has power grid, autonomous generators, renewable energy resources, storage devices, and controllable loads has been proposed. In this paper, we consider an allocation and scheduling problem of electrical and thermal storage devices together with other devices in building energy system to minimize the overall cost while satisfying the occupants demand. The...
In a renewable energy community the energy demand must be supplied on-site using renewable sources. Energy storage systems and load management are key factors to achieve energy balance. This paper presents the performance comparison, based on software simulations, of two different arrangements of a theoretical renewable energy community in the German city Cottbus. Electricity is generated from photovoltaic...
The rising of electricity and heating prices due to primary energy resources scarcity will drive households to generate their own energy on-site using renewable sources. Energy generation potential and energy demand are directly proportional to specific geographic location and urban density. This paper presents an analysis, based on software simulations, of different on-site electricity and heating...
Microgrid is noticed as a system that can reduce CO2 emission from a residential area. Microgrid can absorb the fluctuation of electricity power which might be generated with several kinds of renewable energy, therefore it doesn't negatively affect on the stability of utility grid. In addition, microgrid has a capability to control the heat-and-power ratio in demand and supply by optimizing the combination...
This paper presents a control strategy for the operation of an autonomous distributed generation system (DGS) that includes multiple energy carries, storage devices and wind energy. The simulation is performed for the heat and electricity demand of 200 households. The proposed control strategy provides suitable performance results and improved energy efficiency for the system under study.
With the rapid process of industrialization, the energy crisis deserves much concern. There is the tendency that the solar-powered water heater enters more families. But the waste of the water resources appears in the process of water feeding. Therefore, the design of water monitor meter is the key to solve the problem, which is convenient and inexpensive and enables to save water and energy.
According to Japanese governmental target, more than 50 GW will be penetrated on the whole utility system until 2030. Such large penetration of PV system may cause deterioration of power quality and stability of the whole utility grid. CRIEPI is promoting a study of future Japanese style smart grid called “Triple I (Intelligent, Interactive, Integrated) Power System (TIPS)” to keep stable and to promote...
There is a need to improve the delivery of energy services, and utilizing distributed energy resources offers significant potential. We propose an energy service modeling technique that would capture temporal variations of its demand and value, and differentiate it from the electric energy consumed by the end-use equipment. We then use this technique with a novel energy service simulation platform...
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