Transmission Network Expansion Planning – A Critical Review

Abstract

Transmission Network Expansion Planning (TNEP) is determination of an optimal network configuration that satisfies the operational conditions for forecasted load growth under a particular generation expansion plan. TNEP may be broadly classified into static and dynamic network planning. Static TNEP (STNEP) deals with finding where and which type of new lines should be installed in an optimal way that minimizes the installation and operational cost. Dynamic TNEP (DTNEP) is more complex and aims at determining when to install the new lines (in addition to determination of where and which type of lines to be installed). Researchers have used mathematical optimization methods, heuristic methods and meta-heuristic methods to solve STNEP problem. DTNEP problem have been tackled using mathematical optimization methods and meta-heuristic methods by the researchers. This paper compiles the significant developments made in the area of TNEP using conventional (mathematical) optimization methods, and advanced (heuristic & meta-heuristic) optimization methods. After a thorough study of vast literature available on TNEP, critical comments and future scope have been presented to make the review study focused and useful for the researchers in this area.