نتایج جستجو برای: droop control method
تعداد نتایج: 2790625 فیلتر نتایج به سال:
We investigate the effect of internal electric field in InGaN well layer of InGaN/GaN multiple quantum well light-emitting diodes (LEDs) on efficiency droop behavior. The simulation results show that the internal electric field in InGaN well layers of Ga-polar LEDs is same as the direction of external electric field by forward bias voltage, resulting in a strong efficiency droop. However, N-pol...
abstract: country’s fiber optic network, as one of the most important communication infrastructures, is of high importance; therefore, ensuring security of the network and its data is essential. no remarkable research has been done on assessing security of the country’s fiber optic network. besides, according to an official statistics released by ertebatat zirsakht company, unwanted disconnec...
The prerequisite for the normal operation of a flexible high-voltage direct current (HVDC) transmission system is maintenance stability (DC)-side voltage, and droop control has good dynamic regulation capability. In this paper, we first study operating characteristics derive its equivalent circuit, as well power distribution equation with four-terminal an example. Then, based on this, improved ...
abstract cooperative learning refers to small groups of learners working together as a team to solve a problem, complete a task, or accomplish a common goal. in a cooperative environment one’s success is directly related to the success of other members because the focus on the individual shifts towards the group. to test the effectiveness of the method, using jigsaw technique, a study was cond...
Distributed cooperative control methods are widely used in the islanded microgrid system. To solve deviation of frequency and voltage caused by droop control, it is necessary to recovery rated value using a secondary strategy. However, traditional communication method relies on continuous periodic one, which makes burden system heavy conflicts with actual operation power grid. Using based distr...
We investigated the efficiency droop and polarization-induced internal electric field of InGaN blue light-emitting diodes (LEDs) grown on silicon(111) and c-plane sapphire substrates. The efficiency droop of the LED sample grown on silicon substrates was considerably lower than that of the identically fabricated LED sample grown on sapphire substrates. Consequently, the LED on silicon showed hi...
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