Excitation Systems

The basic function of an Excitation system is to provide direct current to the synchronous machine field winding. It also performs CONTROL and PROTECTIVE FUNCTIONS essential to the satisfactory performance of the power system by controlling the field voltage and thereby the field current. Modeling of Excitation Systems •Mathematical models of Excitation systems are essential for the assessment of desired performance requirements ,for the design...

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Bombing of US Embassies in East Africa

At 10:30 a.m. local time, a massive truck bomb explodes outside the U.S. embassy in Nairobi, Kenya. Minutes later, another truck bomb detonated outside the U.S. embassy in Dar es Salaam, the capital of neighboring Tanzania. The dual terrorist attacks killed 224 people, including 12 Americans, and wounded more than 4,500. The United States accused Saudi exile Osama bin Laden, a proponent of international terrorism against America, of masterminding the bombings. On August 20, President Bill Clinton ordered cruise missiles launched against bin...

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