نتایج جستجو برای: sfcl
تعداد نتایج: 180 فیلتر نتایج به سال:
Utilizing renewable energy sources (RESs) to their full potential provides an opportunity for lowering carbon emissions and reaching a state of neutrality. DC transmission lines have considerable the integration RESs. However, faults in are challenging due lack zero-crossing, large fault current magnitudes short rise time. This research proposes using superconducting limiter (SFCL) effective li...
The development of industrial technology is based on electronic devices that are sensitive to power quality. Thus, the demand for high-quality and reliable supplies increasing. Voltage sag results in severe problems manufacturing process quality-sensitive loads. When a fault occurs multi-ground distribution system, magnitudes current voltage faulted nonfaulted feeders become high. Hence, instal...
واحدهای تولید پراکنده در کنار مزایای فراوان، اثرات منفی متعددی بر سیستم توزیع دارند. با وقوع خطا در موقعیت های گوناگون، اثرات منفی dg ناشی از افزایش سطح جریان خطا و تغییر جهت جریان در برخی خطوط می باشد. از مهمترین این اثرات می توان به فرمان قطع اشتباه، عدم مشاهده خطا، کاهش دسترسی تجهیزات حفاظتی و برهم خوردن هماهنگی میان این تجهیزات اشاره کرد. روش های مختلفی جهت کاهش اثرات منفی dg بر سیستم حفاظت...
DC system protection is more challenging than that for AC due to the rapid rate of rise fault current and absence natural zero-crossing in systems. Superconducting limiter (SFCL) systems a promising technology reduce level current, also SFCLs have no resistance during normal operation. In this paper, behaviors an SFCL coil are investigated under both low impedance high conditions condition syst...
The design process of a superconducting current limiter (SFCL) requires simulation and definition of its electrical, magnetic and thermal properties in form of equivalent circuits and mathematical models. However, any change in SFCL parameters: dimension, resistance, and operating temperature can affect the limiting mode, quench time, and restore time. In this paper, following the simulation of...
With the growing demand for electricity, there is an expansion of distribution network, with insertion new elements (capacitor bank, motors, etc.) and even energy sources such as distributed generation. Such insertions can intensify transient electromagnetic current phenomena in these networks, short circuits, motor starting energizing transformers capacitor banks, being necessary analyzes to e...
Fault current limiters are essential devices used to protect the power system and its equipment against high levels of fault current, which growing up due increase new sources. This paper proposes a novel design Hybrid Superconducting Current Limiter (Hybrid SFCL), is composed basically by thyristors in series with superconducting element. branch connected parallel an air-core reactor, improves...
Abstract High-temperature superconductors (HTS) can be superconducting in liquid nitrogen (77 K) at atmospheric pressure, which holds immense promises for our future such as nuclear fusion, compact medical devices and efficient power applications. In a system, high short-circuit currents exceed the operational current by more than ten times, putting many parts of system risk. Superconducting fa...
Large-scale electric aircraft is a disruptive technology to address the environmental impact of air travel. Fault current limitation crucial realise safety and reliability aircraft, in particular for large-scale using DC distribution network. This paper investigates behavior resistive SFCL under different cryogenic cooling systems including liquid nitrogen helium gas circulation Electromagnetic...
The increase of current uniformity along a resistive type superconductor fault limiter (R-SFCL) in the design this limiters is well perceived as an important issue. non-uniform distribution R-SFCL only increases some superconducting regions, result, conditions, certain parts undergo phase change that heat pressure those areas and causes breakdown destruction device. In paper, density distributi...
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