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For specific mission and unique configure of Shipboard Electrical Power Systems (SEPS), their relay protection schemes are different from Terrestrial Electrical Power Systems (TEPS). With development of system capacity and network topology, the traditional three-step current protection method can not meet protection demands, which has the feature of off-line setting. Based on the characteristic and...
To improve the performance of traditional VVVF (variable voltage variable frequency) elevator, a parallel energy feedback system is designed for energy-saving application. The presented system can send back the regenerated energy to the grid through the parallel three-phase power converter, avoiding the waste of the electric energy. Furthermore, the parallel part can act as active power filter(APF)...
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