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This paper is intended to introduce the project Energy4Growing that aims at studying and setting up a hybrid micro-grid to supply power to a school in rural Tanzania. It describes the results of the early project actions which concerned in: (i) analysing the actual school power supply system through locally metered data; (ii) developing the first step of a new electro-mechanical model which addresses...
Global statistics reports all over the world demonstrates that wind generation is the only renewable energy that could really help in the future on matching the reduction of CO2 emissions (at least in the short and mid term scenario). Thus the TSOs of most European Countries (where this renewable resource is more relevant) have modified their Grid Codes, in order to regulate the behavior of connected...
In the present study divergence operator is exploited with the aim to improve the frequency regulation in a distribution network weakly connected to the transmission grid. A novel regulator has been investigated to drive a storage device with the target to improve the system dynamic behavior. The proposed approach has been implemented in a dedicated dynamic simulation tool. The performance of the...
This paper describes the possible evolution of Italian distribution system in facing the growing penetration of Dispersed Generation (DG), in the perspective of smart grids. As for the Italian system, after discussing the Hosting Capacity of MV distribution networks, it is recognized that some challenges are to be faced due to the increasing amount of DG. Even though current technology provides satisfactory...
The Hierarchical Voltage Control has recently become an important alternative to the traditional voltage control solutions. This paper deals with the computation of an optimal profile for the pilot bus voltages using different optimization strategies. For this purpose, the mathematical model of the optimization problem was studied considering two issues: i) defining the constraints of the optimization...
Usually, the main purpose of optimal reactive power flow (ORPF) programs is to minimize the total power losses of a network, maintaining the voltage profile within an acceptable range. This model was adopted by almost all the vertically integrated utilities. Nowadays, in the liberalized environment, a new ORPF formulation, aimed at an explicit maximization of the system security, is more suitable...
Voltage control and reactive power support have been deeply investigated by the technical point of view. System operators and planners have developed complex control schemes, in order to achieve a secure and efficient operation. After the enforcement of market structures, new issues have appeared. Nowadays, the main subjects related with the reactive power management are: maintaining an adequate security...
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