November – General Issue
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Written by Swetha Shekarappa G, Sheila Mahapatra, and Saurav Raj
State Estimation (SE) is a crucial part of energy management techniques applied in the supervision and regulation of hubs of electrical networks. SE is a recognized feature for secured operation of the power sector and has been implemented for several decades. Nevertheless, since power Distribution Systems (DSs) have traditionally been largely passive with unidirectional power flow, its usage for analysing and controlling DSs has still not been extensively adopted. Transmission System State Estimation (TSSE) cannot be explicitly applied to DSs because of the intrinsic differences between DS features and transmission system attributes. This article aims to summarise the most recent developments in Distribution System State Estimation (DSSE), which is a key component of smart grid functionality.
Written by Mohamed Izdin Hlal, Vigna K. Ramachandaramurthya, and Ahmed Altaher
In the first part of this work, eight scenarios were proposed to economically select an optimal design of a Hybrid Renewable Energy System (HRESs) using NSGA-II algorithm to minimize the Loss of Load Probability (LLP) and Cost of Energy (COE) with an optimum Depth of Discharge (DOD). These scenarios take into account the sizing of Perhentian island in Malaysia. Based on the optimization results from part 1 , the lowest cost of energy associated with the highest reliability for the solar PV/ BES system was achieved at 79% DOD. The results show that the proposed method is capable of optimizing the hybrid system. The use of this method can pave away some of the technical challenges that hinder hybrid system projects and it can be used as a support tool to promote off-grid rural electrification projects.
Written by Mike Prescher
I am frequently asked how it is that electric grids and other critical infrastructure have, in what seems like just a few years, become such a focus for ransomware attacks. My most succinct response is, “It’s become a target-rich environment.” The elements and systems which make up grid operations have been rapidly evolving from analog technology to digital-lots of change there. But have cybersecurity practitioners defending those grid operations changed along with this transition?
Written by Shamsul Aizam Zulkifli and Momoh Kabir
In the near future, Electric Vehicle (EV) will complement the power generation by generating an extra power generation to the electrical grid when it is needed. As known, the EV is driven from electric source that has been stored in EV battery and it can be discharged to the charging station when the grid needs extra power for quick power restoration during a fault. Therefore, the Vehicle to Grid (V2G) concept should be in place with the electric grid operation for solving this fault conditions in order to avoid instability on the grid.
Written by Subir Majumder and Anurag K. Srivastava
In this article, “Resilience-driven Integration of Distributed Energy Resource (DER): Holistic Value Analysis”, incentives to realize DER’s value streams were analyzed for a tiered level of grid integration. Through suitable mechanisms, DERs can also provide resiliency services alongside reliability, ancillary services, and carbon-credits, helping DER operators recoup the DER investment costs while enriching the bulk power grid operations. If valued appropriately through suitable policy mandates, in the long run, DERs could compete with or possibly replace conventional generators through a market-based mechanism.