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Power Restoration

Restor­ing pow­er after wide­spread out­ages is a big job that involves more than sim­ply throw­ing a switch or remov­ing a tree from a line. It involves a huge coor­di­na­tion effort with pos­si­bly hun­dreds of line­men, tree trim­mers, and office per­son­nel work­ing in very dan­ger­ous sit­u­a­tions. There is noth­ing rou­tine when restor­ing pow­er after a storm.

Dur­ing an out­age, Coastal Elec­tric is com­mit­ted to restor­ing the elec­tric pow­er to all co-op accounts as safe­ly and quick­ly as pos­si­ble. In this effort, our over­rid­ing goal is to safe­ly restore pow­er to the great­est num­ber of mem­bers in the short­est time pos­si­ble. In order to accom­plish that, the process begins with a dam­age assess­ment of the co-op’s lines and facil­i­ties by employ­ees who have been specif­i­cal­ly trained to accom­plish those tasks. The assess­ment allows the co-op to direct its resources (both labor and mate­ri­als) to the areas where they are need­ed the most.

Repairs are first made to the co-op’s large trans­mis­sion lines which car­ry high-volt­age elec­tric­i­ty to our dis­tri­b­u­tion sys­tem from gen­er­a­tion sta­tions. Lines such as these must be repaired first along with any dam­age to trans­mis­sion sub­sta­tions. Trans­mis­sion lines serve many thou­sands of accounts.

Next in the process of restora­tion of pow­er are the dis­tri­b­u­tion sub­sta­tions and their respec­tive main feed­er lines. The co-op has 13 sub­sta­tions on its sys­tem and there are just under 2,000 miles of dis­tri­b­u­tion and ser­vice lines that are rout­ed from the sub­sta­tions. Main feed­er lines are those that you nor­mal­ly see along­side a high­way.

Indi­vid­ual tap lines are repaired next in the restora­tion process. Tap lines typ­i­cal­ly serve the fewest num­ber of mem­bers.

Safe­ty is our high­est pri­or­i­ty dur­ing any pow­er restora­tion sit­u­a­tion. Some­times you will notice your lights going back off short­ly after they have come back on. In some cas­es, it is nec­es­sary to remove pow­er from an ener­gized sec­tion in order to safe­ly repair any dam­ages or replace trans­form­ers or oth­er line equip­ment. Most times the pow­er will come back on once the repair is made. In oth­er cas­es, your pow­er may go off because it is a legit­i­mate out­age. When in doubt, you can always call 843–538-5800 to re-report the new out­age.

Infographic: Steps to restoring power

The Steps to Restor­ing Pow­er [PDF]

Hur­ri­canes and ice storms. Tor­na­does and bliz­zards. Elec­tric coop­er­a­tive mem­bers have seen them all in the last few years. And with such severe weath­er comes pow­er out­ages. Restor­ing pow­er after a major out­age is a big job that involves much more than sim­ply throw­ing a switch or remov­ing a tree from a line.

The main goal is to restore pow­er safe­ly to the great­est num­ber of mem­bers in the short­age time pos­si­ble.

The major cause of out­ages is dam­age caused by fall­en trees. That your elec­tric coop­er­a­tive has an ongo­ing right-of-way main­te­nance pro­gram.

The illus­tra­tion above explains how pow­er is typ­i­cal­ly restored after a major dis­as­ter, such as a hur­ri­cane or tor­na­do. While pow­er restora­tion pri­or­i­ties may dif­fer from co-op to co-op, elec­tric sys­tem repairs gen­er­al­ly fol­low a plan sim­i­lar to the one illus­trat­ed here.

Step 1. Trans­mis­sion tow­ers and lines sup­ply pow­er to one or more trans­mis­sion sub­sta­tions. These lines sel­dom fail, but they can be dam­aged by a hur­ri­cane or tor­na­do. Tens of thou­sands of peo­ple could be served by one high-volt­age trans­mis­sion line, so if there is dam­age here it gets atten­tion first.

Step 2. A co-op may have sev­er­al local dis­tri­b­u­tion sub­sta­tions, each serv­ing thou­sands of con­sumers. When a major out­age occurs, the local dis­tri­b­u­tion sub­sta­tions are checked first. A prob­lem here could be caused by a fail­ure in the trans­mis­sion sys­tem sup­ply­ing the sub­sta­tion. If the prob­lem can be cor­rect­ed at the sub­sta­tion lev­el, pow­er may be restored to a large num­ber of peo­ple.

Step 3. Main dis­tri­b­u­tion sup­ply lines are checked next if the prob­lem can­not be iso­lat­ed at the sub­sta­tion. These sup­ply lines car­ry elec­tric­i­ty away from the sub­sta­tion to a group of con­sumers, such as a town or hous­ing devel­op­ment. When pow­er is restored at this stage, all con­sumers served by this sup­ply line could see the lights come on, as long as there is no prob­lem fur­ther down the line.

Step 4. The final sup­ply lines, called tap lines, car­ry pow­er to the util­i­ty poles or under­ground trans­form­ers out­side hous­es or oth­er build­ings. Line crews fix the remain­ing out­ages based on restor­ing ser­vice to the great­est num­ber of con­sumers.

Step 5. Some­times, the dam­age will occur on the ser­vice line between your house and the trans­former on the near­by pole. This can explain why you have no pow­er when your neigh­bor does. Your co-op needs to know you have an out­age here, so a ser­vice crew can repair it.

Reprint­ed from Car­oli­na Coun­try (N.C. Asso­ci­a­tion of Elec­tric Coop­er­a­tives)

Coastal Electric Cooperative, Inc. of South Carolina