Most countries have implemented incentives to increase their energy generation capacity, prioritizing the adoption of renewable energy sources. However, the development of electrical transmission infrastructure has lagged behind, resulting in a negative impact on established goals for new renewable capacity and discouraging new investments. Additionally, current planning and development timelines, along with potential delays in transmission and generation projects, could create gaps between needs and planning, distort market signals, and alter the expected evolution of the electrical system. The objective of this study is to analyze the dynamics of project development timelines in the evolution of the Colombian electrical market, using System Dynamics.