توجه: محتویات این صفحه به صورت خودکار پردازش شده و مقاله‌های نویسندگانی با تشابه اسمی، همگی در بخش یکسان نمایش داده می‌شوند.
۱CONTROL STRATEGY FOR SVC DEPLOYED IN A DEVELOPING EHV TRANSMISSION SYSTEM
نویسنده(ها): ، ، ،
اطلاعات انتشار: نهمین کنفرانس بین المللی برق، سال
تعداد صفحات: ۱۱
Static Var Compensators (SVC) are being increasingly employed in Power System mainly to control the voltage either by absorbing the reactive power or by supplying the reactive power to the system. SVCs provide solutions in Power System to a variety of problems inherent to the growth of any developing Power System in:
– Effective voltage Control including control of temporary over voltages.
– Increasing the power transfer capability. Increasing transient stability margin.
– Damping of power oscillations.
To derive the maximum benefits from SVCs while achieving the above functions, it is required that the control strategy for SVCs is specified keeping in view the prevalent system conditions during normal and contingent modes of system operation. This is of great concern in a growing EHV system where the variation in system configuration from worst network contingency to normal system operation to the planned configuration is very large. To meet these objectives it is necessary that the control strategy for SVC, particularly the under voltage strategy and the strategy during frequency excursions, is evolved for the system to which SVC is dedicated in a very careful manner. However, due to economic
considerations it may not be possible to cater for all the contingencies. In those case a compromise is reached considering the probability of
occurrence of such a contingency.<\div>

۲Acute transplant renal artery thrombosis due to distal renal artery stenosis: A case report and review of the literature
اطلاعات انتشار: Journal of nephropathology، سوم،شماره۳، Jul ۲۰۱۴، سال
تعداد صفحات: ۴
Background: Acute renal artery thrombosis is a devastating complication of renal transplantation that can result in graft loss if not detected early. Surgical and technical errors are the major cause of renal artery thrombosis. In this article, for the first time, we are reporting a case of acute renal artery thrombosis that developed early post–transplantation due to distal renal artery stenosis. Case Presentation: A 71–year–old woman presented with nausea, vomiting and decreased urine output 7 days after a deceased donor kidney transplant. Doppler ultrasound showed absent renal and venous flow in the transplanted kidney. Transplant renal artery angiogram showed renal artery thrombosis. Catheterization and thrombectomy were done in the occluded renal artery. After thrombectomy, renal angiogram showed distal renal artery stenosis which was dilated by stenting. Post–stenting angiogram showed good blood flow in the entire renal arterial system. However, the patient’s kidney function did not improve within next 24 hours and the patient eventually lost the kidney. Kidney biopsy showed widespread kidney infarction with no evidence of rejection. Conclusions: Our case shows that renal artery thrombosis can develop due to distal renal artery stenosis and if not detected early could result in graft loss.
نمایش نتایج ۱ تا ۲ از میان ۲ نتیجه