Identifying Market Power for Potential Collusions in Electricity Supply

Market power identification is an important issue for spot electricity market analysis and operation. Market power is more complicated than that in other market to identify due to the specific properties and mechanisms of electric market. This paper proposes a method to identify different type of market power, such as generation dominance, transmission congestion and collusion between electricity suppliers. Structural indices and indices base on market simulation method are presented to identify three type of market power. A three-bus test system is presented to verify the correctness and effectiveness of the proposed method.