In the power market

for the varieties of the real time operation of power system

the probability of transmission congestion increases greatly. For most transmission

large differences in locational prices would be dominated by the difference in congestion costs in terms of theory of the Spot Pricing of Electricity. The holders of the TCCs（Transmission Congestion Contract） have a perfect hedge for the spot price of transmission congestion. A concurrent auction method of TCCs is suggested in this paper. Numerical examples are used to illustrate that the theory is correct and efficient.