A real-time optimal coordination scheme for the voltage regulation of a distribution network including an OLTC, capacitor banks, and multiple distributed energy resources

2018 ◽  
Vol 94 ◽  
pp. 1-14 ◽  
Author(s):  
Khawaja Khalid Mehmood ◽  
Saad Ullah Khan ◽  
Soon-Jeong Lee ◽  
Zunaib Maqsood Haider ◽  
Muhammad Kashif Rafique ◽  
...  
Keyword(s):  
Real Time ◽  
Distribution Network ◽  
Voltage Regulation ◽  
Energy Resources ◽  
Distributed Energy Resources ◽  
Distributed Energy ◽  
Capacitor Banks ◽  
Coordination Scheme ◽  
Time Optimal ◽  
Optimal Coordination

scholarly journals Optimal Coordination of Over-Current Relays in Microgrids Using Principal Component Analysis and K-Means

2021 ◽  
Vol 11 (17) ◽  
pp. 7963
Author(s):  
Sergio D. Saldarriaga-Zuluaga ◽  
Jesús M. López-Lezama ◽  
Nicolás Muñoz-Galeano
Keyword(s):  
Principal Component Analysis ◽  
Principal Component ◽  
Component Analysis ◽  
Energy Resources ◽  
Distributed Energy Resources ◽  
Distributed Energy ◽  
Number Of Clusters ◽  
Coordination Scheme ◽  
Optimal Coordination ◽  
Operational Models

Microgrids (MGs) are decentralized systems that integrate distributed energy resources and may operate in grid-connected or islanded modes. Furthermore, MGs may feature several topologies or operative scenarios. These characteristics bring about major challenges in determining a proper protection coordination scheme. A new optimal coordination approach for directional over-current relays (OCRs) in MGs is proposed. In this case, a clustering of operational models is carried out by means of a K-means algorithm hybridized with the principal component analysis (PCA) technique. The number of clusters is limited by the number of setting groups of commercially available relays. The results carried out on a benchmark IEC microgrid evidence the applicability and effectiveness of the proposed approach.

scholarly journals A Real-Time Monitoring Platform for Distributed Energy Resources in a Microgrid—Pilot Study in Oman

Electronics ◽  
2021 ◽  
Vol 10 (15) ◽  
pp. 1803
Author(s):  
Nasser Hosseinzadeh ◽  
Ahmed Al Maashri ◽  
Naser Tarhuni ◽  
Abdelsalam Elhaffar ◽  
Amer Al-Hinai
Keyword(s):  
Real Time ◽  
Communication Channel ◽  
Energy Resources ◽  
Distributed Energy Resources ◽  
Small Scale ◽  
Area Network ◽  
Distributed Energy ◽  
Real Time Monitoring ◽  
Holistic View ◽  
Monitoring Platform

This article presents the development of a platform for real-time monitoring of multi-microgrids. A small-scale platform has been developed and implemented as a prototype, which takes data from various types of devices located at a distance from each other. The monitoring platform is interoperable, as it allows several protocols to coexist. While the developed prototype is tested on small-scale distributed energy resources (DERs), it is done in a way to extend the concept for monitoring several microgrids in real scales. Monitoring strategies were developed for DERs by making a customized two-way communication channel between the microgrids and the monitoring center using a long-range bridged wireless local area network (WLAN). In addition, an informative and easy-to-use software dashboard was developed. The dashboard shows real-time information and measurements from the DERs—providing the user with a holistic view of the status of the DERs. The proposed system is scalable, modular, facilitates the interoperability of various types of inverters, and communicates data over a secure communication channel. All these features along with its relatively low cost make the developed real-time monitoring platform very useful for online monitoring of smart microgrids.

Distribution Static Compensators and their Applications in Microgrids

2017 ◽  
pp. 87-141
Author(s):  
Ahmed Abu-Siada ◽  
Mohammad A. S. Masoum ◽  
Yasser Alharbi ◽  
Farhad Shahnia ◽  
A .M. Shiddiq Yunus
Keyword(s):  
Quality Improvement ◽  
Storage Systems ◽  
Voltage Regulation ◽  
Energy Resources ◽  
Distributed Energy Resources ◽  
Distributed Energy ◽  
Unequal Distribution ◽  
Power Quality Improvement ◽  
And Control ◽  
Unbalanced Loads

Microgrids are clusters of distributed energy resources, energy storage systems and loads which are capable of operating in grid-connected as well as in offgrid modes. In the off-grid mode, the energy resources supply the demand while maintaining the voltage and frequency within acceptable limits whereas in the gridconnected mode, the energy resources supply the maximum or nominal power and the network voltage and frequency is maintained by the grid. This chapter first summarizes the structure and control principles of microgrids. It then briefly introduces the structures and control perspectives of distribution static compensators (DSTATCOMs). Finally, some applications of DSTATCOMs are discussed in microgrids. The introduced applications are power quality improvement due to the presence of nonlinear and unbalanced loads, voltage regulation and balancing, and interphase power circulation in the case of the presence of single-phase energy resources with unequal distribution amongst phases. Each application is illustrated by examples, realized in PSCAD/EMTDC.

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