Load shifting

Load Shifting has two meanings: electrical and transportation related.

Electrical Loadshifting

In electrical power-grid management, load shifting or loadshifting refers to moving mass electrical charge from one part of the grid to another, especially during peak demand. To simplify, this entails seeing the electrical grid as a sort of "pool of water" that is constantly springing leaks and constantly being filled up at different points. By switching generation capacity from one grid to another, overall voltage irregularities can be reduced and peak demand met with fewer blackouts, brownouts, over-voltages, or under-voltages. Load shifting is a critical part of the modern electrical grid management science or load management.

Load Shifting in Transportation

Load shifting is a dangerous phenomenon in water, air and even ground transportation. For a boat loaded with many small moveable items (for example, coal), if a boat begins to tip past 10 or 15 degrees consistently, some of the cargo will then spill on the downward side, and overtime, this can lead to escalating tilt of the boat and eventual capsize. Such a dangerous occurrence is prevented by active load management, avoidance of high sea conditions, and proper container/bulkhead design.

On a cargo airplane, a professional loadmaster is necessary to prevent the highly-dangerous phenomenon of loadshifting. If a plane begins to take off with cargo unsecured, some of the cargo may slide to the aft of the airplane, resulting in catastrophic switch in centre-of-gravity and a stall condition. The National Airlines Flight 102 disaster is currently believed to be a result of load shifting.

Commercial air travel

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