Insight into the trending of solar radiation and ambient temperature in Malaysia towards a possible implementation on step-wise rating

Abstract

Traditional static line ratings for transmission lines usually take into account the worst case assumptions when determining line capacity rating. In Malaysia, these conservative ratings have been around for 40 years. The values used for ambient temperature, wind speed, solar radiation and other parameters have never been reviewed and thus the same ratings have been used for the past decades. In this regard, it is uncertain if the values assigned to the parameters are still relevant for the present and future application due to the fact that solar radiation values are not static and changes over time. Therefore, the level of certainty in which grid infrastructure is utilised in a highly efficient manner in transmitting power and electrical energy is debatable.