Weighting transmission loading relief nodal indexes for the optimal allocation of distributed generation in power systems

Abstract

This paper presents a methodology for the optimal location of distributed generation (DG) in power systems using the Weighted Transmission Loading Relief (WTLR) nodal indexes. These indexes are used to guide a GRASP metaheuristic in charge of the optimal allocation of different DG units in a transmission network. The objective consists on minimizing the most negative WTLR indexes, which results in an increase of the system security. Several tests are presented in a representative prototype of the Colombian power system, evidencing the effectiveness of the proposed methodology. Results show that a proper allocation of DG units minimizes system overloads both in normal operation and under contingencies.

A Test System for Transmission Expansion Planning Studies

“…In the literature, several test systems at transmission voltage levels have been suggested for TEP studies. These include the six-bus Garner test system [8], the IEEE 24-bus system [9,10], the HRP-38 bus system designed for TEP with high renewable energy penetration [11], the 46-bus Southern Brazilian system [9,12], the 87-bus Brazilian northnortheastern network [13,14], the Columbian power system with 93 nodes [15], the IEEE 118-bus test system, also known as NREL-118 [16], and a reduced Western Electricity Coordinating Council (WECC) system with 300 nodes [17]. Additionally, a few other systems have been proposed for TEP in references [5,18].…”