Integrating dynamic line rating in security constrained optimal power flow considering wind power generation

Abstract EN

Traditional optimal power flow (OPF) problem is solved considering static line rating (SLR) of the transmission lines which are constant values of power flow limits.

This led to underutilization of the network and higher locational marginal prices (LMPs).

Dynamic line rating (DLR) is one of the active solutions to enhance ampacity for overhead transmission lines (OHTL), especially with the penetration of high wind power without investing in an additional transmission line network.

This paper investigates the effect of integrating the DLR on power dispatch with uncertainty levels due to renewable energy sources (RES) generation.

The model propose is a multi-period security constrained OPF based on particle swarm optimization (SCOPF / PSO) that takes into consideration the steady-state heat-balance equation (SS-HBE) of the OHTL and the ramp-up time of generation units.

The problem is a multiobjective optimization one ; the main objective is to maximize the social welfare (SW) by minimizing total system operation cost and maximizing the revenue from the energy consumers, whereas the second objective is to minimize the thermal emissions.

To demonstrate the effectiveness of the proposed model, a case study is applied to the modified IEEE 30-bus test system.

The results expound on the effectiveness of the proposed approach.