Imbalances

Tennessee will implement Imbalance Warnings in downstream market-area Zones 5 and 6 Saturday, saying it has limited operational flexibility to manage imbalances there over what is predicted to be a cold long holiday weekend. All delivery point operators in the zones will be required to keep actual daily takes out of the system equal to or less than scheduled quantities regardless of their cumulative imbalance position. Receipt point operators must keep actual daily receipts into the system equal to or greater than scheduled quantities regardless of their cumulative imbalance position.

Saying it had limited operational flexibility to manage imbalances in upstream Zones 0, L, 1, 2, 3 and 4 over the long holiday weekend, Tennessee issued an Imbalance Warning for shippers in those zones effective Friday until further notice. Affected delivery point operators are required to keep actual daily takes out of the system equal to or greater than scheduled quantities regardless of their cumulative imbalance position. Receipt point operators must keep actual daily receipts into the system equal to or less than scheduled quantities regardless of their cumulative imbalance position.

Southern California Gas declared a high-linepack OFO for Saturday, setting a 10% tolerance for positive daily imbalances on deliveries into its system.

Southern canceled Monday the Type 6 OFO for long imbalances that it had implemented last Wednesday.

Citing forecasts of cold weather in market-area Zones 5 and 6 limiting its operational flexibility to manage imbalances, Tennessee said it implemented an Imbalance Warning in those zones at the start of Friday’s gas day. All affected delivery point operators were required to keep actual daily takes out of the system equal to or less than scheduled quantities regardless of their cumulative imbalance positions, while receipt point operators had to keep actual daily receipts into the system equal to or greater than scheduled quantities regardless of their cumulative imbalance positions.

Anticipating limited operational flexibility to manage positive imbalances in downstream Zones 4, 5 and 6 due to possible impacts of Hurricane Irene, Tennessee issued an Imbalance Warning to become effective Saturday in those zones. All delivery point operators are required to keep actual daily takes out of the system equal to or greater than scheduled quantities regardless of their cumulative imbalance position, while all zone receipt point operators must keep actual daily receipts into the system equal to or less than scheduled quantities regardless of their cumulative imbalance position.

With Florida forecasts of temperatures in the mid 90s, Florida Gas Transmission issued an Overage Alert Day for market-area customers Tuesday with a 25% tolerance for negative daily imbalances.

Tennessee declared an Imbalance Warning Monday to enhance its operational flexibility to manage high imbalances in Zones 5 and 6. The warning requires delivery point operators in those zones to keep actual daily takes out of the system equal to or less than scheduled quantities regardless of their cumulative imbalance position, and receipt point operators to keep actual daily receipts into the system equal to or greater than scheduled quantities regardless of their cumulative imbalance position.

Pacific Gas and Electric issued a systemwide Stage 1 high/low-inventory OFO for Friday, setting penalties of 25 cents/Dth for either negative or positive imbalances exceeding a 10% tolerance.