LMP implementation in New England

LMP implementation in the region had profound effect on the market participants and ISO staff in terms of understanding the new market and its economic consequences. Regardless of numerous training sessions and testing, it took several months for the marketplace to understand how to deal with the world of LMP. Important issues in the LMP implementation are handling different infeasibilities. Determining prices when systems runs out of controls and transmission constraints are violated requires special attention and must be carefully designed. Another type of infeasibility is excess of generation - total generation is greater than total load. Correct use of locational marginal pricing requires developing consistent mathematical models and attention to all the details of implementation. Developing understanding of these details and the consequences of each decision as early is one of the most important conditions of a successful market design