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Western US grid operator warns that emergency conditions could persist in seven states

The operator of a major power grid in the west of the United States warned on Sunday about emergency situations that are likely to continue during periods of high demand, underscoring how vulnerable this region is to interruptions in imported energy.

The Southwest Power Pool's (SPP) regional grid has seen a rise in rotating blackouts over the last?week. SPP's reserves were dwindling on Friday after a sudden drop in electricity imports from neighboring grids.

SPP prevented outages by asking for voluntary conservation to maintain reserves. SPP is expecting the highest demand of the week in the western territory on Sunday evening as temperatures reach above 90 degrees Fahrenheit.

SPP is usually a net electricity exporter due to its large wind power base. The heat last week meant that neighboring grids were unable to provide SPP with much power because of the weather-driven demand.

SPP stated that its West region would remain in place until August 1, according to a conservative operation advisory. The advisory was released to increase awareness about potential threats to the grid's reliability.

Southwest Power Pool released a statement saying that "Our West will likely continue to experience advisories and energy emergency alert conditions, especially during high demand periods."

SPP is responsible for managing the flow of electricity in a vast territory, which includes 17 states and 20 million residents. Seven western states, which became a part of the?SPP last April and are vulnerable to power outages, make up this group.

SPP's advisories and warnings in the last week have warned that reliability is threatened by a combination of high demand, generator failures and sudden losses of imports.

(source: Reuters)