An efficient treatment of transient residual currents in distribution networks grounded with Petersen coil

2004 ◽  
Author(s):  
W.-Y. Huang
Keyword(s):  
Distribution Networks ◽  
Efficient Treatment ◽  
Residual Currents ◽  
Petersen Coil

Analysis of Petersen Coil Application in Electrical Distribution Networks

2011 ◽  
Vol 317-319 ◽  
pp. 2335-2338
Author(s):  
Yan Zhou Sun ◽  
Kun Hu ◽  
Wan Ying Ren
Keyword(s):  
Power Distribution ◽  
Response Speed ◽  
Distribution Networks ◽  
High Accuracy ◽  
Servo Control ◽  
Power Distribution Networks ◽  
Current Output ◽  
Series Resonance ◽  
Electrical Distribution Networks ◽  
Petersen Coil

The purpose of this paper is to show the development of Petersen coil and compensated network in the high voltage power distribution networks of China. There were two correlative questions when the Petersen coil is used, one is to restrict the series resonance under normal conditions, and the other is to choose the grounded line correctly. The KD-XH Coil, which uses the servo-control adjustment, has high response speed (less than 5 milliseconds), continuously adjustable current output (from zero to rated value) and linear V-A characteristic, and shows high accuracy in applications as soon as the grounding fault occurs.

Percutaneous mechanical thrombectomy in the treatment of acute and subacute occlusions of the peripheral arteries and bypasses

VASA ◽  
2016 ◽  
Vol 45 (1) ◽  
pp. 49-56 ◽  
Author(s):  
Frantisek Stanek ◽  
Radoslava Ouhrabkova ◽  
David Prochazka
Keyword(s):  
Mechanical Thrombectomy ◽  
Clinical Success ◽  
Major Amputation ◽  
Peripheral Arteries ◽  
Duration Of Symptoms ◽  
Efficient Treatment ◽  
Percutaneous Mechanical Thrombectomy ◽  
Single Centre Study ◽  
Crural Arteries

Abstract. Background: The aim of this prospective single-centre study was to analyse the immediate results, failures and complications of percutaneous mechanical thrombectomy using the Rotarex catheter in the treatment of acute and subacute occlusions of peripheral arteries and bypasses, as well as to evaluate long-term outcomes of this method. Patients and methods: Patients with acute (duration of symptoms < 14 days) or subacute (duration of symptoms > 14 days and < 3 months) occlusions of peripheral arteries and bypasses were selected consecutively for treatment. The cohort consisted of 113 patients, aged 18 - 92 years (median 72 years). In all, 128 procedures were performed. Results: Angiographic success was obtained in 120 interventions (93.8 %). Reasons for failures were rethrombosis of a partially recanalised segment in six procedures, and embolism into crural arteries in one intervention - percutaneous aspiration thromboembolectomy (PAT) and/or thrombolysis were ineffective in all these cases. Breakage of the Rotarex catheter happened in one procedure. Embolisation into crural arteries as a transitory complication solvable with PAT and/or thrombolysis occurred in four cases. Rethrombosis was more frequent in bypasses than in native arteries (p = 0.0069), in patients with longer occlusions (p = 0.026) and those with poorer distal runoff (p = 0.048). Embolisation happened more often in patients with a shorter duration of symptoms (p = 0.0001). Clinical success was achieved in 82.5 %. Major amputation was performed in 10 % of cases. Cumulative patency rates were 75 % after one month, 71 % after six months, 38 % after 12 months, 33 % after 18 months and 30 % after 24, 30, 36 and 42 months. Conclusions: Rotarex thrombectomy has excellent immediate results with a low rate of failures and complications. In comparison to thrombolysis, it enables the fast and efficient treatment of acute and subacute occlusions of peripheral arteries in one session.

Microgrids and Active Distribution Networks

2009 ◽  
Author(s):  
S. Chowdhury ◽  
S. P. Chowdhury ◽  
P. Crossley
Keyword(s):  
Distribution Networks ◽  
Active Distribution Networks
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