LV/MV/HV Technical Articles
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Current and voltage measurements using Rogowski coil in MV air-insulated switchgear
This thesis focuses on measuring currents and voltages by Rogowski coil and voltage dividers and communication bus using IEC 61850-9-2 in MV switchgear. Both technologies as such, have been independently… Read more
The basics of power system protection that every engineer should know about
Protection is the branch of electric power engineering concerned with the principles of design and operation of equipment (called ‘relays’ or ‘protective relays’) that detects abnormal power system conditions, and… Read more
Guidelines for a modern digital substation design
The challenge with hardwiring, is that the connections to the protection schemes are different; the data transferred is slow and cannot be compared. The communication failure reports locally at the… Read more
Advanced protection scheme for power transformers based on IEC 61850 standard
Power transformers of medium and large sizes are very critical and vital components for power systems. Due to its significance and cost, its protection needs to be appropriately addressed. Transformer… Read more
Medium voltage networks – Load flow calculation and network planning
A load flow calculation study is necessary to verify that the electrical system has the adequate capacity to supply the connected load. In addition, this study will provide information regarding… Read more
Elements of Electrical Engineering
Concept of transformation: By the application of Kirchoffs Laws some problems cannot be solved and finds great difficulty due to number of equations. Such problems can be simplified by using… Read more
Motor Starting Calculation (MS Excel Spreadsheet)
A motor starting case study for any given electrical network can be performed by reducing the network to a smaller equivalent network consisting of a source (generator/grid), the starting motor… Read more
Big data mining and analytics in substation automation and network management
This thesis begins with the study of current naming conventions used in the power systems. Two standards, the COMTRADE and the IEC 61850, that define the organizing of data are… Read more
The basics of high voltage switching equipment in power substations and switchyards
A circuit breaker is defined as “a mechanical switching device capable of making, carrying, and breaking currents under normal circuit conditions and also making, carrying, and breaking for a specified… Read more
Stability analysis of power network using 600kV, 800kV, and 1000kV HVDC
An attempt to have a more stable power network in order to meet the ever-increasing energy demand and totally eradicate power failure in South Africa brings about the construction of… Read more
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