By: Prof. Ts. Ir. Dr. Mohd Zainal Abidin Ab. Kadir

The demand for electrical energy is increasing due to the increase in the world population, transport technology, and economic expansion, thereby resulting in overloading to the overhead line (OHL) system. Using conservative temperature and wind speed assumptions to determine Static Line Ratings (SLR) for the grid can result in unutilized capacity, and lead to market binding events, redispatch, curtailment, and barriers for renewable energy projects in transmission-constrained areas. Conversely, overestimating ratings during low wind periods can compromise Malaysian Grid Code (MGC) line clearances and conductor health, putting the safety and dependability of the grid at risk. Dynamic line rating (DLR) has been seen as an important tool for planning and operation of power systems, and recently, for smart-grid applications as opposed to the existing approach of using the static line rating (SLR). DLR considers the variability of the grid and its surroundings (safety clearance, ambient temperature, solar radiation, wind speed, cloud shading). In light of this, future grid expansion incorporating more REs and cleaner solutions such as battery energy storage systems need to be evaluated / assessed. New weather-based DLR will be evaluated, taking into account thermal stress and ageing of conductors, with an appropriate assessment of available ampacity margin and reduction volume of lost load (VoLL). Such assessment is crucially needed, considering the currently aged grid infrastructure all around the world. Thus, optimising existing power by increasing the ampacity of power line is a practical solution to meet energy demand issues where the proposed work will provide thorough information in many aspects of grid resiliency for sustainable energy supply, reducing the generation constraint and achieving net-zero carbon by 2050.

Date of Input: 25/07/2024 | Updated: 03/07/2025 | puteriamirah