نتایج جستجو برای: voltage coordination
تعداد نتایج: 185431 فیلتر نتایج به سال:
Research in High Voltage and Insulation Engineering of <scp>UHV</scp>‐Class Electric Power Equipment
For ultra-high-voltage (UHV) systems together with high-voltage facilities, more rationalized insulation coordination and equipment design are required. To this end, making large-scale long-term field lightning-strike observations, large amount of practical experiments, introducing new analysis techniques have enabled the development advanced technologies capable transforming conventional techn...
این گزارش در مورد انواع شارژپمپ ها که برای ایجاد ولتاژ بالاتر استفاده می شوند و پارامترهای اساسی آنها توضیح می دهد. در نهایت در مورد بازده و ریپل ولتاژ شارژپمپ طراحی شده بحث می شود. ریپل ولتاژ پایین برای بسیاری از مدارات جزو پارامترهای مهم می باشد. اگر ریپل ولتاژ خروجی بسیار بزرگ باشد، عملکرد شارژپمپ که تامین توان می باشد، تنزل پیدا می کند.پارامتر مهم دیگر بازده می باشد. شارژپمپ با بازده پایین،...
in this thesis,spin dependend transport and electron transport through of ng/sg(graphene/ superconductor graphen) are studied in the junction of ng/fgt/sg. due to andreev reflection conductance increases in the presence of superconductor graphene.also, by applying a voltage gate on a superconductor, fermi level shifts and the conductance is independent of ferromagnatic substrate. also, the cond...
In this paper, a multi-stage protective scheme is proposed to maintain the fuse and reclosers coordination. The proposed method operates online and proportional to the photovoltaic sources penetration rate. In the first step, a non-standard Current - Time - Voltage curve is used for fuse saving. If the new calculated TDS from the first stage is not implementable to the reclosers, the second sta...
voltage stability may be improved by various control functions. in this paper, it is shown that how high side voltage control (hivc) may be employed for this purpose. two test systems, namely a 22- bus and ieee u8-bus systems are used to demonstrate the proposed tuning strategy for hsvc control parameters.
Established practice is such that the relay protection system and excitation are adjusted independently of each other, which very often leads to non-coordinated action. When network disturbance occur, it necessary provide basic functions eliminate fault if necessary, all generators respond so as preserve stability use most their capabilities. The task under prevent damage generator in a not all...
In recent years, with increasing the penetration of renewable-based distributed generations, voltage control plays a vital role in operating distribution systems. Furthermore, traditional devices are not fast enough to regulate due transient events and intermittent characteristics renewable energy sources. On other hand, because response power electronic components, photovoltaic (PV) inverter c...
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