Southwest Power Pool Restores Load; Anticipates Regional Grid Conditions Will Continue to Evolve - Transmission & Distribution World

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After directing its member utilities to implement controlled interruptions of service shortly after noon on Feb. 15, Southwest Power Pool has restored load to its 14-state region as of 2 p.m. Central U.S. time. The grid operator now has enough generation available to meet demand throughout the service territory and to fully meet its minimum reserve requirements.

The SPP system reached a peak electricity usage of 43,661 MW on Feb. 15 and is required to carry additional operating reserves in excess of load. After committing all of its reserves and exhausting other avenues such as importing power from other regions, available generation in SPP fell about 641 MW short of demand for a period beginning just after noon. In response, SPP directed its member utilities to implement planned interruptions of service to curtail electricity use by that amount.

Effective as of 2 p.m., SPP canceled the Emergency Alert (EEA) Level 3 it had declared at 10:08 a.m. when its reserves were exhausted, and re-entered an EEA Level 2 and 3 over the next 48 hours and may have to direct further interruptions of service available generation to meet high demand.

While SPP and its member companies work to maintain regional reliability, they urge consumers across the service territory to conserve electricity at home and at work, and to follow their local utility's directions regarding safety, conservation and potential outages.

SPP manages the electric grid across 17 central and western U.S. states and provides energy services on a contract basis to customers in both the Eastern and Western Interconnections. The company’s headquarters are in Little Rock, Arkansas.

Severe winter weather across the United States this week has caused emergency declarations, power outages and hazardous road conditions. Nearly 170 million people are under winter weather advisories, according to a CNN report, while almost 3 million customers were without power as of early Monday morning.

A majority of the outages were in Texas, with the Electric Reliability Council of Texas (ERCOT) calling for rotating outages as it "entered emergency conditions and initiated rotating outages at 1:25 a.m." About 10,500 MW of customer load was shed at the highest point, ERCOT reported. This is enough power to serve approximately two million homes.

Extreme weather conditions caused many generating units – across fuel types – to trip offline and become unavailable. There is now over 30,000 MW of generation forced off the system.

Midcontinent Independent System Operator (MISO) South Region also reported that severe weather has contributed to the loss of generation and transmission. This has led to emergency actions in the region’s western portion to avoid a larger power outage on the bulk electric system.  Periodic power outages began early Monday morning for some customers in Southeast Texas.

Southwest Power Pool also issued a new energy emergency alert Monday morning due to extreme cold. The weather has created energy deficiencies in the region, SPP said.

In Southern Missouri and northern Arkansas, several thousand lost power Monday morning during the dangerous cold weather.

Here are some pictures posted to social media by utilities whose work crews are currently fighting to restore power to areas struck by these outages.

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Southwest Power Pool Restores Load; Anticipates Regional Grid Conditions Will Continue to Evolve - Transmission & Distribution World
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