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Dr. Daniel Tenfen

Federal Institute of Santa Catarina, Brazil


Talk Title
Energy Management through Optimization as a Key to the Future Grids

Talk Abstract

Electricity is fundamental in modern society and in its absence can cause major social and economic impacts. The renewable distributed generation, combined heat and power, energy storage systems and demand side management have emerged as viable alternatives to the power systems grows and improvement, allied to new technologies, new market regulations and the cost reduction for its connection and communication with the main network. These generations and energy storages, which may also be non-electric in nature, are commonly known as Distributed Energy Resources (DERs). When these DERs are locally grouped with load demands (controllable or not), with the possibility of total or partial supply, being able to operate on island or connected mode and coordinate with the main grid, it is created the so-called microgrid. The microgrid concept is greater than the previous definition, since in philosophy, in addition to having a flexible operating topology, with power flow in both directions, allowing the consumers been active agents, with the capacity to consume, manage and generate electric energy or other form of energy, having a high level of automation, maintaining the voltage and frequency control and, thus, constituting the so-called active networks. The microgrids may be locally controlled by the owner(s) or the distribution or transmission operator depending on the local regulation and interests. Smart houses and smart buildings can be classified as particular cases of microgrids, having controllable loads and/or DERs and not always the possibility to operate in island mode with the main grid. There are other ways to connect and control DERs within the main grid as an economical and/or operational independent entity, without the need of locally grouping it, as the so-called Virtual Power Plants (VPPs). The concept of VPPs could be summarized as a group of DERs which may contain loads demands, connected locally or scattered to the main grid, operated or address as an independent entity, taking into account each economical and operational characteristic for each connection with the main grid. Different from the microgrid, the VPPs do not aim the island operation. The VPPs concept, besides individual DERs and loads demand, could also include conventional generators and microgrids. With the addition of microgrids and VPPs to the current distribution and transmission systems, some technical and commercial impacts are inherent in both the operation and planning of these future power systems, which could be solved with the Energy Management (EM), also known as scheduling problem. The EM has similarities, at least in philosophy, with the classic problem of unit commitment. The usual objective is to determine an operating schedule that minimizes operating costs over a given planning horizon, ensuring a supply of energy with adequate electricity level of quality and reliability. Given the philosophy of the problem, the modelling and resolution through optimization methods is widely used, however, it may be solved with other methods. The EM of microgrids and VPPs have peculiarities that make its solution a challenging activity, such as constraints linked to the performance of DERs, operational effects linked with uncertainties in climatic conditions, controllable demands, among others, which are addressed throughout the presentation. This talk has the main objective to present the methodological aspects, the challenges and a discussion of the energy management as a key to the future grids. In order to do so, the presentation is organized in five sections as follows: the first section introduces the basis and the problem. During the second section, a formal introduction to transmission and distribution networks, microgrids, smart houses, smart buildings, VPPs and the EM problem, comparing with the classic unit commitment problem and presenting the several characteristics that have influence on this problem. Additionally, it is present a subsection specially dedicated to the state of the art of the problem. In turn, the section 3 refers to the modeling of the elements of the microgrids and VPPs, with a focus on energy studies with an optimization modelling for each of the DERs and the controlled load demands. Examples, case studies and computational results for existents problems are present in section fourth. Finally, in the fifth section it is presents the final considerations and conclusions.

Short Biography

Bachelor's at Electrical Engeneering from Centro Universitário de Jaraguá do Sul (2009), master's (2011) and Doctor (2015) at Engineering from Universidade Federal de Santa Catarina. Has 7 years of professional experience in Electric Engineering, focusing on Electrical Power Systems. Coordinator and participant in projects on electrical energy system, highlighting the ELECON project ( Interests: optimization, electrical systems, smart grids, microgrids, renewable energy, reliability, energy management. Currently is a lecturer (assistant professor) and researcher at Federal Institute of Santa Catarina – Florianópolis - Brazil.

Talk Keywords
Energy Management, microgrids, Virtual Power Plants, Optimization.
Target Audience
Graduate Students, Postdoctoral, Researchers, Doctors and professors in electrical energy
Speaker-intro video

The International Conference on Innovative Applied Energy (IAPE’18)