While more and more countries are restructuring energy sector to promote competition, it is becoming debatable as which market model works better than the other under different market conditions. This project developed an interactive simulator to assess the operation of a competitive electricity market under different scenarios to establish the most suitable option for a country/ utility . Developed with significant contribution from EnergyConsult staff, the simulator replicates real time and interactive conditions of the market. The participants, representing various market players e.g. generators, retailers, distributors, customers, regulators and market administrator, control their operating parameters to simulate different market situations under changing supply and demand, and regulatory conditions.