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To drain or not to drain after distal pancreatectomy: reflexions on the PANDORINA trial

Hepatobiliary Surgery and Nutrition 2024年第4期13卷 675-677页

作者： maxime constant Alexandre Doussot Department of Digestive and Surgical Oncology Liver Transplantation UnitCHU BesanconBesançonFrance

We read with great interest the PANDORINA study(1).This international multicenter(mostly from the Netherlands)randomized controlled trial aimed at determining whether omitting drainage after distal pancreatectomy(DP)was equivalent in terms of complications to systematic drainage *** primary outcome was the occurrence of severe complications at 90 days defined as Dindo-Clavien grade≥*** main secondary outcome was the occurrence of grade B–C postoperative pancreatic fistula(POPF)at 90 *** both outcomes,the non-inferiority threshold was set at 8%.Randomization was performed intraoperatively,stratified by annual center volume(high volume defined as DP≥40/year)and the risk of POPF according to the distal fistula risk score(D-FRS)combining pancreas thickness(high risk,>19 mm)and main pancreatic duct diameter(high risk,>3 mm)measured both at the isthmus(2).

关键词： Drainage distal pancreatectomy(DP) randomized controlled trial

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Dual Control Strategy for Grid-tied Battery Energy Storage Systems to Comply with Emerging Grid Codes and Fault Ride Through Requirements

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Journal of Modern Power Systems and Clean Energy 2022年第4期10卷 977-988页

作者： maxime Berger Ilhan Kocar Evangelos Farantatos Aboutaleb Haddadi Department of Electrical Engineering Polytechnique MontréalMontréalCanada Electric Power Research Institute(EPRI) Palo AltoUSA

Battery energy storage systems(BESSs)need to comply with grid code and fault ride through(FRT)requirements during disturbances whether they are in charging or discharging *** literature has shown that constant charging current control of BESSs in charging mode can prevent BESSs from complying with emerging grid codes such as the German grid code under stringent unbalanced fault *** address this challenge,this paper proposes a new FRTactivated dual control strategy that consists of switching from constant battery current control to constant DC-link voltage control through a positive droop *** results show that the strategy ensures proper DC-link voltage and current management as well as adequate control of the positive-and negative-sequence active and reactive currents according to the grid code *** is also shown that the proposed FRT control strategy is tolerant to initial operating conditions of BESS plant,grid code requirements,and fault severity.

关键词： Battery energy storage system inverter-based resource fault ride through electromagnetic transient

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