February 2, 2011 by staff
Rolling Blackouts, Bearing failure, also called load shedding, power outage intentionally designed electric. Power outages are a measure of last resort used by a power company to avoid a total failure of the electrical system. They are usually in response to a situation where demand for electricity exceeds the capacity of the power network. Power outages can be traced to a specific part of the electricity grid or perhaps more widespread and affect entire countries and continents. Power outages usually the result of two causes: insufficient production capacity or poor transport infrastructure to provide sufficient power to the area where it is needed.
In many African countries, South Asian and Latin American countries (eg Bangladesh, India, Yemen, Nepal, Pakistan, Cameroon, Democratic Republic of the Congo Republic, Nigeria, South Africa, Egypt, Zimbabwe and Dominican) blackouts is a staple of everyday life. Sometimes, these cuts are planned at specific times of day and week, allowing people to circumvent the time of interruption known. In most other cases, power outages can occur without warning, usually when the transmission frequency is less than the “safety” limit.
Power generation and transport systems can not always meet the requirements of peak demand-the highest amount of electricity required by all utility customers in a given region. In order to reduce electricity demand on power systems at critical times, researchers have developed a prototype ballast that quickly and reliably sheds the electric charge in the lighting system of a building. Ballast unloader ballast is dimming instant start bi-level and high-power line receiver signal (PLC) for automatic dimming response.
By light intensity by an electronic signal, the ballast reduces the supply current of the lamps. Injector signal lighting circuits building ballast control, eliminating the need for additional wiring. Ballasts respond to a signal sent by the service or the customer’s system power management, reducing the lighting power by one third. Field studies have shown that building owners might dim the lights by as much as 40% for short periods of time without affecting 70% of building occupants or impede productivity. Ninety percent of the occupants of the building have agreed to reduce levels of light when they were told it was done to save energy.
The ballast system of new work on individual fixtures, and not on the main electricity grid. The system is recommended for new construction and renovation and promises good returns on investment in energy savings. Markets in the U.S., the system has duration of three years or less payback period for new construction. The use of ballast has the potential to reduce U.S. demand for 20,000 megawatts peak power. If used widely, it has the potential to help avoid breakdowns.
In April 2006, parts of Texas experienced rolling blackouts due to excessive use of air conditioning due to unusually high temperatures. The outage lasted the longest power for five hours, affecting areas in the Middle East to South Texas. [Citation needed]
In February 2011, North and Central Texas experienced rolling blackouts due to 50 power plants tripping offline.
Temperatures ranged between 8 ° C and 19 ° F. The timing of the blackout range from 20 minutes to over five hours. Affected areas included Bell, Bexar, Brazos, Collin, El Paso, Dallas, Delta, Harris, Hill, Hidalgo, Hunt, McLennan, Montgomery, Navarro, Smith, Tarrant, Travis, Webb and Williamson counties. [via wikipedia and various sources]
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