Optimum Network Ageing and Battery Sizing for Improved Wind Penetration and Reliability

Abstract

A multiobjective framework that optimises the uprating of the line's real-time thermal rating and capacity of battery storage against wind curtailment, network ageing and reliability is proposed. The two enhancements are limited to the accumulated expected amount and duration of wind power losses of each wind farm bus. In the framework, actual conductor properties, line failures due to thermal effects, weather data, battery operation policy and wind farm model are considered. The trade-off of the optimisation criteria, the Pareto front, is solved using the non-sorting genetic algorithm and fuzzy decision-making method. Results show that the conductor maximum allowable temperature affects all the three optimisation parameters, but battery efficiency only affects wind curtailment level.

Keywords

• Battery energy storage
• line rating
• reliability
• optimisation
• ageing
• overhead lines