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In the current situation, when conventional energy based on fossil fuel combustion are polluting and time-limited, there is an increasing emphasis on the exploitation of non-polluting renewable sources. At both global and European levels, particular attention is paid to the use of renewable energy sources, encouraging, through various projects, the progressive change from the use of fossil fuels to...
Transmission expansion planning (TEP) is helping the system operator to decide the optimal solution for building new lines and in the same time to increase the reliability and safety of the existing power system. The proposed problem is a mixed-integer nonlinear programming problem (MINLP) and it is solved using stochastic programming. Stochastic programming is applied when uncertain environment occurs,...
The liberalization of electricity markets in Europe was a highly-debated topic in the last thirty years. Almost three decades after the start of the deregulation processes, performances obtained by the introduction of competition in the electricity markets are still difficult to be perceived by final consumers. Until now, the assumption that the deregulated electricity markets naturally generate lower...
This paper deals with distribution companies (DISCOs) point of view on opportunities of optimizing investments planning and operation costs, considering possible increase and geographical displacement of high consumption buses, increasing the consumption at different time instants in other buses, by optimally installing and sizing distributed energy resources. The optimization problem is sizing and...
The present paper deals with an electricity market software package developed for educational purposes. The electricity market package presents mainly the day-ahead market and methods for the electricity consumption forecast. The simulator, designated for students, report all the steps required for generators and buyers to participate to the day-ahead market, determining the market clearing price,...
The existing trend of consumption increase and population growth, combined with reduction of primary energy resources, determined adoption of energy efficiency increase measures to better cope with the existing necessities. The main characteristics of smart cities are starting to be defined such that to be applied to various cities with different population, sizes and level of technology development...
To accommodate the intermittent renewable energy sources in existing power systems, the expansion of networks, storage integration, back-up capacities and efforts for a flexible consumption are required, otherwise grid can be overloaded. The transmission expansion planning (TEP) has the purpose to ensure two important objectives: economic trade and engineering reliability. TEP can increase the competitiveness...
The microgrids can function as a single controllable system in a grid-connected or islanded operation mode. The transition from grid-connected mode to islanded mode can result in microgrid excess generation or demand, which must be spilled or curtailed. This paper proposes an optimization model for optimizing the microgrid operations accounting for distributed energy resources (stochastic generation...
An energy-informatic-centric smart campus represents a viable structure addressing to different groups of users, like: students, teachers/educators, researchers and technical administrators, using information and communications technology system interface for accessing various services and requiring real time information regarding university buildings energy consumption and production, air quality...
This paper analyzes the optimized operation of smart campus on the electricity market for maximizing his overall profit. The smart campus has the character of a virtual power plant with distributed energy resources with stochastic power and dispatchable classical generating units. The load is represented by the campus consumptions which can be shifted daily to accomplish the desired goals. This smart...
This paper analyzes the optimized operation of a virtual power plant owner on the day-ahead market for maximizing his overall profit. The virtual power plant is composed of distributed energy resources with variable produced power, energy storage systems, and dispatchable classical generating units. The intermittent character of wind and solar irradiation is addressed using the forecasted production...
The main goal of the wastewater treatment plant management consists in reducing the annual electricity costs by trying to supply the load demand using renewable energy sources (RES) (such as photovoltaic panels and biogas-based cogeneration engine). Based on real case measurements and carried on design process of the stochastic sources and cogeneration engine for covering the load demand, an optimization...
Economic and environmental reasons stimulated people to build low energy houses all over the world. In order to study this kind of buildings, adapted to the Romanian climatic conditions, a new project was developed by the University POLITEHNICA of Bucharest. The present paper deals with the presentation of the passive house build within the campus of University POLITEHNICA of Bucharest and with the...
The existing distribution networks are growing with complexity more and more, due to the gradual increase of power demand and variation of loads. This paper describes several heuristic algorithms applied to the optimal configuration of loop distribution network. Configuration problems are too complicated and time consumed to be solved. These problems are basically large-scaled combinatorial optimization...
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