Coordinated Generation and Transmission Expansion Planning with High Proportion of Renewable Energy Penetration /

Abstract

Network expansion planning (NEP) plays a pivotal role in the development of power systems. It entails investing in new generating units and transmission lines to meet growing load demands and ensure a reliable electricity supply. Historically, the incorporation of demand response factors in power system planning has been limited due to their complexity and evaluation challenges. However, with advancements in smart grid technologies, increased integration of renewable energy, and the emergence of flexible loads, the inclusion of demand response models has become crucial for enhancing power system reliability. While numerous studies have delved into generation and transmission expansion planning (GTEP) problems, only a few have explored the integration of network payment schemes and demand response within the GTEP framework. This study proposes a multi-annual generation and transmission expansion planning model that incorporates three network payment schemes and two demand response techniques. The objective is to secure financing for new generating units and transmission lines while minimizing the overall system cost. The proposed models employ the Mixed-Integer Linear Programming (MILP) optimization method and are validated using a modified IEEE 24-bus system. Two key system performance metrics, namely the network congestion index and network saturation index, are employed to assess system reliability and effectiveness. The results demonstrate that the integration of network payment schemes and demand response techniques into the generation and transmission expansion planning model can lead to cost reduction, improved integration of renewable energy sources, enhanced operational flexibility, and reduced power system congestion.