Performance Analysis of Smart Grid Solutions in Distribution Power Systems

Katić, Nenad

doi:10.12700/aph.15.6.2018.6.5

Cited by 3 publications

References 15 publications

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Application of the Base Transceiver Station with Smart Antennas in the Power Distribution Sector

Kleinau

Melo

et al. 2021

International Journal of Antennas and Propagation

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The use of distribution automation systems has grown significantly in electricity companies in recent years. The main reason for this is the need to have a smarter network, in order to reduce the time of power interruption. For such applications, communication using radio frequency is preferred because this solution is more reliable than 3G/4G and cheaper than fiber optics. In this context, it is of utmost importance to have a more efficient base transceiver station (BTS) that can cover the communication of a larger area. In this paper, the mathematical concepts of an intelligent antenna array, as well as the logical operation of an intelligent radiation system controller, are presented. Such system receives as inputs the geographic coordinates of network elements and automatically feeds an intelligent Yagi–Uda antenna array with the appropriate parameters, in order to optimize the radiation pattern into the desired directions. The presented model uses a stochastic optimization method to automatically achieve a set of optimal electrical parameters to excite the array and efficiently direct its beams in a fully controlled way. Thus, the results obtained indicate that the proposed intelligent scheme allows the energy optimization of the antenna system, reducing in 61% the number of BTS needed to cover the same area, when compared to traditional collinear antenna systems.

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Application of the Base Transceiver Station with Smart Antennas in the Power Distribution Sector

Kleinau

Melo

et al. 2021

International Journal of Antennas and Propagation

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Criticality of isolation valves in water distribution networks with hydraulics and topology

Wéber

Huzsvár

Déllei

et al. 2023

Preprint

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Purpose: Occasional, random pipe bursts are inevitable in water distribution networks; thus, the proper operation of isolation valves is critical. The damaged segment is segregated using the neighbouring valves during shutdown, causing the smallest isolation possible. This study analyses the importance of isolation valves individually from the perspective of the demand shortfall increment. Methods: An in-house, open-source software called STACI performs demand-driven simulations to solve the hydraulic equations with pressure-dependent demand determining the nodal pressures, the volumetric flow rates, and the consumption loss. The system has an additional consumption loss if an isolation valve cannot be closed. The criticality of an isolation valve is the increment in the relative demand shortfall caused by its malfunction. Moreover, centrality indices from complex network theory are applied to estimate the criticality without the need for computationally expensive hydraulic simulations. Results: The distribution of criticality values follows a power-law trend, i.e. some of the isolation valves have significantly higher importance during a shutdown. Moreover, Spearman's rank correlation coefficients between the centrality and criticality values indicate limited applicability. Conclusion: The criticality analysis can highlight which isolation valves have higher importance during reconstruction planning or maintenance. The Katz and the Degree centrality show a moderate positive correlation to the criticality, i.e., if numerous hydraulic simulations are not feasible, these quantities give an acceptable estimation.

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A Single-Phase Buck and Boost AC-to-AC Converter with Bipolar Voltage Gain: Analysis, Design, and Implementation

et al. 2019

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In this research, a new single-phase direct AC-to-AC converter, operating in buck and boost mode, with a bipolar voltage gain, is proposed. The operation is accomplished through high frequency direct and indirect PWM control of a single switch with low voltage stresses. This reduces, not only the control effort, but also the switching losses. The low voltage stresses across the high frequency switches, reduce the dv/dt problem significantly without any loss and bulky voltage snubber arrangement. The operation, in its all-operating modes, has a low inductor ripple current and switching current. The proposed converter may be employed as an AC voltage restorer in a power distribution system to cope with the voltage sag and swell issues. The detailed analysis of the proposed converter is carried out in order to compare its performance with the existing converters. The simulation results obtained using the MATLAB/Simulink environment are verified through experimental results.

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Performance Analysis of Smart Grid Solutions in Distribution Power Systems

Cited by 3 publications

References 15 publications

Application of the Base Transceiver Station with Smart Antennas in the Power Distribution Sector

Application of the Base Transceiver Station with Smart Antennas in the Power Distribution Sector

Criticality of isolation valves in water distribution networks with hydraulics and topology

A Single-Phase Buck and Boost AC-to-AC Converter with Bipolar Voltage Gain: Analysis, Design, and Implementation

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