An application scheme of block bidding theory in a regional power market

Based on the block bidding theory principles and models, the difficulties of applying block bidding theory in regional power markets are studied. Hydro power is scheduled first, then the paper discusses methods to classify different capacity ranges of the modified load curve. Given the fact that the regional markets are divided into several price zones according to provincial development differences, the section load constraints are introduced into the market clearing process to realize the price zone partition automatically. Unit capacity of equal bidding price should be selected or reduced according to equal proportion step by step, with constraints of section load capacity and unit minimum output. Then the mathematical model of block bidding in regional power market is presented, considering the power balance, unit operation limits and section load constraints. This model can be solved by merit-order method combining above solutions for practical difficulties. Simulation of 87-unit system shows that the presented method is effective, and block bidding application in regional power market is a good selection for generation and grid companies. This work is supported by Special Fund of the National Basic Research Program of China (No. 2004CB217905).