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Enron Mail |
barkerde@nmenergy.com writes to the NYISO_TECH_EXCHANGE Discussion List:
Some feed back so far...... There appears to be a problem brewing with the planned implementation of the May 29 adjustment that removes the $20K bias from the DAM external transactions.I am awaiting a call back on my concerns from the NYISO. By occasionally settling hourly prices through BME or occasionally settling after SCD sets RT prices, depending on the extistence or non existence of congestion, a problem that we thought we fixed many months ago will reappear with the removal of the $20K bias.Here is an example of my musings.... DAM bid gets accepted at $50 ( Import from PJM) ..... BME then runs (No constraints) evaluating the import HAM bids and other items that have BMEprovide a $40 price.... DAM gets cut , looks like a $10 profit ( providing your loss in PJM doesn't exceed $10) . Due to in hour operations the RT price clears at $60. You loooooooose!! Sound familiar? After getting beat up like this the MP's went through the committee structure and had the $20,000 adder used for DAM (except IS+) to protect against this. The clearing at BME for all external proxy busses removed the problem so the $20,000 adder was removed. Now the external interfaces only clear at BME if they are constrained. Are we taking a huge step back on purpose or was there a mistake in implementation?
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