The Power Quality of the distribution networks and its impact on the Telecommunication Next Generation Access Network

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Investigation on different control methods for single-phase DVC

Power Quality (PQ) conditioning in LV distribution networks is an increasing concern within modern power system and Smart Grid systems. Several phenomena have classified in standard, among those, voltage sags and rms voltage drifts have been reported as most significant and frequent ones in both MV and LV distribution systems. Several solutions have been proposed to deal with these voltage disturbances. Dynamic Voltage Restorer (DVR) and Dynamic Voltage Conditioner (DVC) are the most promising solutions. Controlling these series connected devices is a challenge especially in single-phase schema which is an appreciated solution for Distribution System Operator (DSO). This paper investigates difference control strategies for single-phase DVC system. Control methods are explained in detail and MATLAB based simulation results are reported. Investigated control methods performance dealing with example voltage drop event have been reported

Application of back-to-back converters in closed-loop and meshed MV distribution grid

This paper deals with the proposal of a connection to form closed-loop or meshes inside one or more medium voltage primary distribution networks. The main idea consists in realizing this connection through a suitable tie converter constituted by two AC/DC converters in back-to-back configuration. In this way, it is possible to control the power flows between two lines or two different grids keeping the radial structure of the system. This can be useful in presence of distributed generation to share the power among many loads connected to different distribution lines. In the paper the proposed system is analyzed, simulated and discussed both in steady state condition and during faults coming from the MV primary distribution network

Demand side activities for improving power quality awareness of industrial customers in a competitive electricity market

The paper illustrates some activities that are being part of an Italian research program of public interest called “Ricerca di Sistema” investigating the main power quality (PQ) aspects at industrial customers across Italy. In particular two main activities are illustrated in detail: a) a questionnaire based survey aimed at building a knowledge base on industrial power quality with particular concern to the possible origins of power supply anomalies and the possible costs that are typically involved; b) a knowledge-based software tool aimed to support industrial customers in evaluating PQ disturbances impact on their processes