Abstract
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 multi-objective 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.
Highlights
Abstract:—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
The performance of the SCOPF formulation with renewable energy sources (RES) and Dynamic line rating (DLR) described in sections II and III is solved in MATLAB® using the PSO technique
The value of lines ampacity in the case of DLR is greater than compared as the SLR, and these results demonstrate decreasing in system operation cost and wind power curtailment
Summary
RECENTLY, governments have become increasingly aware of the importance of increasing the RES activation to foster national development. View the decreases in the optimum total cost of operating the system according to a solution to the traditional problem of unit commitment with DLR [14] It showed an expansion in wind power usage which increased the carrying capacity of OHTL associated with the wind farm[7]. The correct application of the DLR requires the calculation traditional problems that can provide an appropriate solution in of the conductor HBE under current meteorological conditions a short time compared to customary techniques that are (the maximum transmitted active power or ampacity). Pose as inputs for this framework that calculates and applies a DLR to Both CIGRE and IEEE use the same general SS-HBE methodology for determining the maximum current capacity of conductor. SCOPF PROBLEM FORMULATION The electricity power generation model is described by a minimum cost through the SCOPF problem that takes into consideration bus voltage constraint, generation level limitations, constraints of contingency and constraints of line flow
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