Medium-Voltage Testbed for Comparing Advanced Power Line Sensors vs. Measurement Transformers with Electrical Grid Events | Chapter 1 | Engineering Research: Perspectives on Recent Advances Vol. 5

Electrical utilities have relied upon potential transformers (PTs) and current transformers (CTs) for very accurate metering and to provide reliable signals for protective relays. These devices measure phase voltages and currents and are commissioned by electrical engineers. PTs/CTs can detect and react to various electrical anomalies that could adversely affect electrical grid operations. Less expensive alternative sensing technologies offer the possibility of wider deployment, particularly in grids that employ distributed energy resources. In this work, the performance of an advanced medium-voltage sensor is compared with that of a reference PT and a CT and experimentally evaluated for different power grid scenarios on an advanced outdoor power line sensor testbed at the U.S. Department of Energy’s Oak Ridge National Laboratory. The sensor is based on a capacitive divider for voltage monitoring and a Rogowski coil with an integrator for current monitoring. This study simulated a power grid model based on a utility circuit at the Riverside EPB of Chattanooga. The simulation circuit was created with MATLAB/Simulink software and was integrated into an RT-LAB project to run with the OP4510 real-time simulator at the OPLST. During the tests, the real-time simulations were run for 40 s, and the signal to record the test event with the power meter was set at 30 s for the event-trigger circuit. The advanced outdoor power line sensor testbed has a real-time simulator that is used to generate transient scenarios (e.g., electrical faults, capacitor bank operation, and service restoration), while the analog signals are recorded by the same high-resolution power meter. The behaviors of analog signals, harmonic components, total harmonic distortion, and crest factors are assessed for this power line sensor and compared with those of the reference PT/CT because of the absence  of testing standards for advanced outdoor power line sensors. The results showed that this OPLS technology responded identically to the PT and CT under all conditions.

 

Author (s) Details

 

Emilio C. Piesciorovsky
Oak Ridge National Laboratory, Electrification and Energy Infrastructures Division, One Bethel Valley Road, Oak Ridge, TN 37831, USA.

 

R. J. BruceWarmack
Oak Ridge National Laboratory, Electrification and Energy Infrastructures Division, One Bethel Valley Road, Oak Ridge, TN 37831, USA.

 

Yarom Polsky
Oak Ridge National Laboratory, Manufacturing Science Division, One Bethel Valley Road, Oak Ridge, TN 37831, USA.

Please see the book here:- https://doi.org/10.9734/bpi/erpra/v5/4054

Optimising Off-Grid Microgrids in Remote Areas: The ‘Micro Reseau Mafate’ Project | Chapter 8 | Science and Technology - Recent Updates and Future Prospects Vol. 2

 

The development of autonomous microgrids presents a suitable alternative for electrifying isolated communities. However, to achieve truly virtuous solutions for environmental protection, a sustainable energy management system is highly recommended. This research project, located on Reunion Island, focuses on modelling the solar resource and user consumption profiles within a microgrid using specialised instrumentation. An innovative human-machine interface (HMI) is then developed and tested in a real-world configuration. This interface utilises a mathematical optimisation program to manage the microgrid effectively. The project meticulously examines the optimal operating point of the entire system, encompassing power generation devices, storage elements, and ultimately, household energy delivery. Tests have demonstrated that, in operational mode, the level of user acceptance of the management tool was highly satisfactory. The tool provides users with real-time information on the performance of the microgrid, which they found very helpful. This pilot program serves as a springboard for the future installation of numerous microgrids throughout this remote region.

 

Author(s)details:-

 

D. Calogine
PIMENT Laboratory, University of La Reunion, France.

 

O. Chau
PIMENT Laboratory, University of La Reunion, France.

 

T. Fanjirindratovo
Physics and Environment Laboratory, University of Toliara, Madagascar

 

O. Ramiarinjanahary
Physics and Environment Laboratory, University of Toliara, Madagascar.

 

J. Francou
PIMENT Laboratory, University of La Reunion, France.

 

P. Rasoavonjy
PIMENT Laboratory, University of La Reunion, France.

 

C. Abbezzot
PIMENT Laboratory, University of La Reunion, France.

 

Please See the book here :-  https://doi.org/10.9734/bpi/strufp/v2/176