Sign in to use this feature.

Years

Between: -

Subjects

remove_circle_outline
remove_circle_outline
remove_circle_outline
remove_circle_outline

Journals

Article Types

Countries / Regions

Search Results (2)

Search Parameters:
Keywords = undervoltage relay

Order results
Result details
Results per page
Select all
Export citation of selected articles as:
22 pages, 8550 KB  
Article
PLC/HMI-Based Implementation of a Real-Time Educational Power System Protective Relays Platform
by Jawad Radhi Mahmood, Ramzy Salim Ali and Raed A. Abd-Alhameed
Electronics 2020, 9(1), 118; https://doi.org/10.3390/electronics9010118 - 8 Jan 2020
Cited by 6 | Viewed by 8187
Abstract
Engineering laboratories are key elements in engineering learning and are essential for a concrete understanding of engineering topics and experiments. These key laboratories are no longer just hardware-dependent, they are a creative combination of programmable hardware and also user-defined driving software. In this [...] Read more.
Engineering laboratories are key elements in engineering learning and are essential for a concrete understanding of engineering topics and experiments. These key laboratories are no longer just hardware-dependent, they are a creative combination of programmable hardware and also user-defined driving software. In this work, an educational power system protective relaying laboratory platform was designed and implemented using a programmable logic controller (PLC) and human–machine interface (HMI) in order to introduce engineering students to the operating mechanisms experimentally. It engaged the students in selecting settings and upgrading the inverse definite minimum time (IDMT) protection relays for overcurrent, overvoltage, undervoltage, and differential current. With the platform and the help of the HMI, the students mastered (or came close to mastering) the field of protective relays, especially those explicitly implemented in the platform. The students were also able to see the real-time response that is equivalent to the relay operation time of the protective relays under the various possible settings, and the kinesthetic learning that was involved gave them a deeper understanding of what is involved in relays upgrading. Full article
(This article belongs to the Section Computer Science & Engineering)
Show Figures

Figure 1

16 pages, 1727 KB  
Article
Adaptive Protection System for Microgrids Based on a Robust Optimization Strategy
by Oscar Núñez-Mata, Rodrigo Palma-Behnke, Felipe Valencia, Patricio Mendoza-Araya and Guillermo Jiménez-Estévez
Energies 2018, 11(2), 308; https://doi.org/10.3390/en11020308 - 1 Feb 2018
Cited by 32 | Viewed by 7102
Abstract
The development of a proper protection system is essential for the secure and reliable operation of microgrids. In this paper, a novel adaptive protection system for microgrids is presented. The protection scheme is based on a protective device that includes two directional elements [...] Read more.
The development of a proper protection system is essential for the secure and reliable operation of microgrids. In this paper, a novel adaptive protection system for microgrids is presented. The protection scheme is based on a protective device that includes two directional elements which are operating in an interleaved manner, namely overcurrent and undervoltage elements. The proposed protection scheme can be implemented in microprocessor-based relays. To define the settings of the protective device, a robust programming approach was proposed considering a finite set of fault scenarios. The scenarios are generated based on the predictions about the available energy and the demand. For each decision step, a robust optimization problem is solved online, which is based on forecasting with a confidence band to represent the uncertainty. The system is tested and compared using real data sets from an existing microgrid in northern Chile. To assess the performance of the proposed protection system, fault scenarios not considered in the optimization were taken into account. The results obtained show that the proposed protective device is able to manage those failure scenarios, as well as those included in the tuning of the settings. Practical considerations are also discussed. Full article
(This article belongs to the Section F: Electrical Engineering)
Show Figures

Figure 1

Back to TopTop