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Monthly Archive for: «December, 2016»

Four essential ingredients of an electrical power system

Generally speaking, you must agree that electrical power system is a complex project consisting of the four main ingredients. Now, let’s observe each ingridient in details: Electricity supply Transmission Distribution Loads All countries now have… Read more

Dec 30, 2016 | Edvard

Four essential ingredients of an electrical power system

The basic calculation of transmission line protection

The excessive currents accompanying a fault, are the basis of overcurrent protection schemes. For transmission line protection in interconnected systems, it is necessary to provide the desired selectivity such that relay operation results in the… Read more

Dec 16, 2016 | Edvard

The basic calculation of transmission line protection

The principles of differential protection you MUST understand

Although nowadays differential protection is achieved numerically, in order to understand the principles of differential protection it is useful to analyze the ubiquitous electromechanical relay. Figure 1 shows a simple differential protection scheme, also known… Read more

Dec 09, 2016 | Edvard

The principles of differential protection you MUST understand


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