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Increasing the operating area of shunt active filters by advanced nonlinear control

Control Theory and Technology 2015年第2期13卷 115-140页

作者： andrea tilli Christian CONFICONI Center of Complex Automated Systems (CASY) at Department of Electrical Electronic and Information Engineering (DEI)University of Bologna

This work is aimed to rigorously manage voltage saturation and maximum current constraints in Shunt Active Filters. In this respect, assuming 'unconstrained' control algorithms have already been defined to achieve standard objectives for such devices(i.e. current tracking for harmonic compensation and DC-bus voltage boundness), a plug-in unit, oriented to extend the system operating region and at the same time preserving good performance under large transients and overload conditions, is *** solution allows to improve availability, robustness and composability of Shunt Active Filters, which are expected to be key features in present and next generation complex and possibly 'smart' power grids. The proposed unit is composed by two ***, a suitable anti-windup strategy is defined in order to deal with control input saturation. Its main purpose is to preserve the original 'unconstrained error dynamics', in face of input saturation, while guaranteeing low computational burden and reduced performance impairment(the latter goal, in harmonic compensation context, leads to rather non-standard problem formulation).To this aim, the anti-windup acts on the current references through a suitably-designed additional dynamics. Then, in order to cope with current limitations, an additional strategy has been designed; again the current references is suitably shaped to comply with the features and bounds of the system, augmented with the above-mentioned anti-windup solution. The proposed scheme can be simply joined to any kind of unconstrained controller adopted to steer Shunt Active Filters. In this work, an Internal-Model-based current controller is adopted as a benchmark case. The proposed approach is validate through extensive simulation tests.

关键词： Shunt active filters power quality anti-windup units control of constrained systems

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A novel control solution for improved trajectory tracking and LVRT performance in DFIG-based wind turbines

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Control Theory and Technology 2020年第1期18卷 43-55页

作者： Ahmad HASHEMI Christian CONFICONI andrea tilli The Center of Complex Automated Systems(CASY)at the Department of Electrical Electronic and Information Engineering(DEI)University of BolognaRisorgimento240136 BolognaItaly Sama Technical and Vocational training College Islamic Azad UniversityKermanshah BranchKermanshahIran

This paper presents a new control strategy for the rotor side converter of Doubly-Fed Induction Generator based Wind Turbine systems,under severe voltage *** main goal is to fulfill the Low Voltage Ride Through performance,required by modern grid *** this respect,the key point is to limit oscillations(particularly on rotor currents)triggered by line faults,so that the system keeps operating with graceful *** this aim,a suitable feedforward-feedback control solution is proposed for the DFIG rotor *** feedforward part exploits oscillation-free reference trajectories,analytically derived for the system internal *** feedback,designed accounting for control voltage limits,endows the system with robustness and further tame oscillations during ***,improved torque and stator reactive power tracking during faults is achieved,proposing an exact mapping between such quantities and rotor-side currents,which are conventionally used as controlled *** simulations are provided to validate the capability of the proposed approach to effectively cope with harsh faults.

关键词： Doubly-fed induction generator(DFIG) wind turbine(WT) feedforward-feedback control mapping solution low voltage ride through(LVRT)

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Locoregional therapy and systemic cetuximab to treat colorectal liver metastases

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World Journal of Gastrointestinal Oncology 2015年第6期7卷 47-54页

作者： Giammaria Fiorentini Camillo Aliberti Donatella Sarti Paolo Coschiera Massimo tilli Luca Mulazzani Paolo Giordani Francesco Graziano Alfonso Marqués Gonzalez Raul García Marcos Fernando Gómez Mugnoz Maurizio Cantore Stefano Ricci Vincenzo Catalano andrea Mambrini Oncology Unit Azienda Ospedaliera "Ospedali Riuniti Marche Nord"San Salvatore Hospital Oncology Radiodiagnostics Oncology Institute of VenetoInstitute for the Research and Treatment of Cancer (IRCC) Diagnostics for Images Unit and Interventional Radiology Azienda Ospedaliera "Ospedali Riuniti Marche Nord" Diagnostics for Images and Interventional Radiology Azienda USL of FerraraDelta Hospital Unit of Anestesiology La Fe University Hospital and Polytechnic Medical Imaging and Interventional and Vascular Radiology La Fe University Hospital and Polytechnic Medical Imaging Center (CDIC) Provincial Clinic Hospital Oncology Unit Azienda Ospedaliera "Carlo Poma" Department of Vascular and Interventional Radiology INRCA Hospital-IRCCS Oncology Unit Carrara General Hospital

AIM: To investigate efficacy and safety of second-line treatment with irinotecan-loaded drug-eluting beads(DEBIRI) and cetuximab(DEBIRITUX) of unresectable colorectal liver ***: Patients with the following characteristics were included in the study: unresectable hepatic metastases from colorectal carcinoma(CRC-LM), progression after first line chemotherapy(any type of chemotherapeutic drug and combination was allowed), second line treatment(mandatory), which included for each patient(unregarding the KRas status) two cycles of DEBIRI(using 100-300 μm beads loaded with irinotecan at a total dose 200 mg) followed by 12 cycles of cetuximab that was administered weekly at a first dose of 400 mg/m2 and then 250 mg/m2; good performance status(0-2) and liver functionality(alanine aminotransferase and gamma-glutamyl transferase not exceeding three times the upper limit of normal, total bilirubin not exceeding 2.5 mg/m L). Data were collected retrospectively and included: tumor response(evaluated monthly for 6 mo then every 3 mo), overall response rate(ORR), KRas status, type and intensity of adverse events(G according to the Common Terminology Criteria for Adverse Events v3.0, CTCAE), overall survival(OS) and progression free survival(PFS).RESULTS: Forty consecutive cases of CRC hepatic metastases were included in the study. Median duration of DEBIRITUX was 4.4 mo(range, 4.0-6.5). Sixteen patients(40%) received the planned 2 cycles of DEBIRI and an average of 10 cetuximab cycles. ORR of the whole sample was 50%, in particular 4 patients were complete responders(10%) and 16(40%) partial responders. The most observed side effects(G2) were: post-embolization syndrome(30%), diarrhea(25%), skin rushes(38%) and asthenia(35%). The retrospective evaluation of KRas status(24 wild type, 16 mutated) showed that the group of patients with wild type KRas had ORR significantly higher than mutant KRas. Median follow-up was 29 mo(8-48 range); median PFS was 9.8 mo and OS was

关键词： Cetuximab Irinotecan-loaded drug-elutingbeads Hepatic metastases Chemoembolization Colonrectal tumor Irinotecan

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