Wireless Communications in Substations

Indoor Non-directed Optical Wireless Communications - Optimization of the Lambertian Order

For an indoor non-directed line of sight optical wireless communication (NLOS-OWC) system we investigate the optimized Lambertian order (OLO) of light-emitting diodes (LEDs). We firstly derive an expression for the OLO from a conventional Lambertian LED model. Then, we analyze the indoor multi-cell NLOS-OWC channel characteristics including the optical power distribution and the multipath time ...

Integrating Remotely Located Substations Into SCADA Systems: A Case Study Using Commercially Available Satellite Internet Service Providers for SCADA Communications

This paper presents observations and analysis experienced by a utility end user. As SCADA systems become a crucial part of daily operations for utilities, finding low-cost, reliable communications for substations in remote geographic locations often presents a challenge. Current SCADA communications methods, including framerelay, T1, and fiber are often unreasonably expensive, in terms of insta...

Impacts of impulsive noise from partial discharges on wireless systems performance: application to MIMO precoders

To satisfy the smart grid electrical network, communication systems in high-voltage substations have to be installed in order to control equipments. Considering that those substations were not necessarily designed for adding communication networks, one of the most appropriate solutions is to use wireless sensor network (WSN). However, the high voltage transported through the station generates a...

A Novel Small E–Ring Shaped Monopole Antenna with Dual Band-Notch Function for UWB Wireless Communications

This paper presents an E-ring shaped printed monopole antenna for UWB applications with dual notched bands performance. In order to generate single frequency band notch function, we applied a U-ring shaped monopole antenna, and by inserting a rectangular ring in the centre of it an E-ring shaped radiating patch created and a dual band-notch function can be achieved. The measured bandwidth of th...

Investigation of Wireless LAN for IEC 61850 based Smart Distribution Substations