Transformer testing facility using static converters

  In 2008 Rotek Engineering, a wholly owned subsidiary of Eskom Enterprises, embarked on a R100-million major expansion programme by upgrading its transformer testing facilities. The company’s requirements were to be able to test transformers up to 800 MVA and 765 kV. The area available for the test equipment was limited to 20 x 12 […]

Integrated and scalable Ethernet redundancy in substations

  An optimised IEC 61850 PRP/HSR architecture should provide scalable integration for easy modification of functionalities and extension of the substation. Upgrading single attached nodes (SANs) and dual attached nodes (DANs) to a PRP/HSR network will require an efficient and cost effective solution in order to construct a seamless/bumpless communication infrastructure to ensure maximum system […]