Innovative Protection Solutions
SP Energy Networks
SP Energy Networks Innovation
Click here to send a question to the contact.
Innovation Funding Incentive
LV & 11kV Networks
At present the interconnected 11kV and 6.6kV networks are protected through the use
traditional unit based schemes. However a subset of these networks utilise bidirectional overcurrent and earth fault relays at remote primary substations.
Protection theory shows that it is impossible to achieve true time-based discrimination
in a solidly interconnected ring network. In practice, experience shows that suitable grading can be achieved, with limitations (such as the use of relatively high time
multipliers, and limited deployment around the ring resulting in large protection zones).
The aim of this project is to investigate and develop a radio-based directional blocking
scheme for use on interconnected ring-type 11kV and 6.6kV networks in the SP-M