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Experimental Variable Band Hybrid Current Mode Control for High Power High Frequency Inverter in Electro Surgical Applications

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IEEE ACCESS 2024年 12卷 97039-97052页

作者： Mohsin Rafiq, Muhammad Ullah, Nasim Prokop, Lukas Misak, Stanislav CECOS Univ IT & Emerging Sci Dept Elect Engn Peshawar 25124 Pakistan Taif Univ Coll Engn Dept Elect Engn Taif 11099 Saudi Arabia VSB Tech Univ Ostrava ENET Ctr Ostrava 70800 Czech Republic

Electrosurgical generators (ESGs) are vital during medical operations, providing high-frequency electrical currents for cutting tissue and coagulation in surgery. Maintaining precise control over output power is challenging due to variable tissue loads. Inconsistent regulation can lead to undesirable surgical outcomes. This paper addresses this challenge through a novel Variable band hybrid current mode control (VBHCMC) technique. The study explores the limitations of existing approaches, such as peak current mode control (PCMC), emphasizing the need for improving control methodologies. The proposed VBHCMC method ensures stable output power, addressing issues associated with PCMC. It dynamically adapts the hysteresis band for variable load impedances, enhancing stability. The significance of this approach lies in its ability to combine the benefits of peak and valley current mode controls while maintaining a nearly constant switching frequency, significantly reducing steady-state errors. Results demonstrate significant reduction in steady-state errors compared to conventional PCMC. The proposed controller provides an effective solution to challenges faced in regulating output power during surgical procedures, enhancing safety and precision. The results have been verified in the MATLAB/Simulink environment, processor-in-loop (PIL) simulation in PSIM and using hardware validation.

关键词： Inverters Power generation Surgery Buck converters Impedance Transformers Control systems Electrosurgery Electrosurgical generators current mode control processor-in-loop electrosurgical analyzer hybrid current mode control

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An integral backstepping controller design for compensated distribution networks with rapid earth fault current limiters in bushfire prone areas

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IET GENERATION TRANSMISSION & DISTRIBUTION 2022年第19期16卷 3928-3940页

作者： Roy, Tushar Kanti Mahmud, Md Apel Roy, Naruttam Kumar Rajshahi Univ Engn & Technol Dept Elect & Telecommun Engn Rajshahi 6204 Bangladesh Northumbria Univ Newcastle Fac Engn & Environm Newcastle Upon Tyne Tyne & Wear England Khulna Univ Engn & Technol Dept Elect & Elect Engn Khulna Bangladesh

This paper presents a nonlinear integral backstepping controller (I-BSC) design scheme for a T-type residual current compensation (RCC) inverter used in compensated distribution networks with rapid earth fault current limiters (REFCLs). The major control task for the proposed scheme is to reduce the fault current to a value suitable for the mitigation of powerline bushfires due to single phase-to-ground faults in compensated distribution networks. The key distinct feature of the proposed I-BSC over the traditional backstepping controller (T-BSC) is that it introduces an integral action for analyzing the dynamic of the tracking error which minimizes its steady-state value and ensures better dynamic performance. In order to prove the global asymptotic stability of the RCC inverter with the proposed integral backstepping controller (I-BSC), the Lyapunov function-based theory is used. Finally, the performance of the I-BSC is analyzed on the MATLAB/Simulink environment and compared with a T-BSC. The performance of both I- and T-BSCs is assessed in terms of transient behaviors of the injected current to the neutral, fault current, and line-to-ground voltage of the faulty phase to ensure the standard operational criteria for self-extinguishing powerline bushfires. Simulation results clearly demonstrate that both controllers fulfill operational standards for REFCL-compensated networks though the I-BSC archives better transient behaviors while comparing with the T-BSC. Results from the processor-in-loop (PIL) validations are also included to further justify the applicability of the newly proposed scheme in the real-time environment.

关键词： T-BSC I-BSC archives better transient asymptotic stability compensated distribution networks nonlinear control systems fault currents phase-to-ground faults bushfire prone areas control nonlinearities Lyapunov methods steady-state value line-to-ground voltage REFCL-compensated networks power transmission faults Lyapunov function-based theory self-extinguishing powerline bushfires superconducting fault current limiters power distribution faults control system synthesis processor-in-loop traditional backstepping controller integral backstepping controller design nonlinear integral backstepping controller RCC inverter T-type residual current compensation inverter rapid earth fault current limiters earthing adaptive control

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Non-real-time hardware-in-loop electromagnetic transient simulation of microcontroller-based power electronic control systems

Non-real-time hardware-in-loop electromagnetic transient sim...

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General Meeting of the IEEE-Power-and-Energy-Society (PES)

作者： Chongva, Gregory Filizadeh, Shaahin Univ Manitoba Winnipeg MB R3T 2N2 Canada

ISBN: (纸本)9781479913039

This paper introduces a new method of modeling microcontroller-based systems in a non-real-time electromagnetic transient (EMT) simulation. Presently, power electronic control system simulation relies chiefly on either simplified control block models in a non-real-time simulator or real-time hardware-in-loop simulation. Migrating control block models from the simulated design to actual microcontroller hardware requires significant additional effort. Real-time hardware-in-loop simulation requires complex interfacing using costly real-time hardware. The method described in this paper replaces control system blocks in non-real-time simulation with actual microcontroller code. The method enables both software-in-loop simulation and processor-in-loop co-simulation, eliminates the drawbacks of the simulation methods described above, and allows direct optimization of the actual controller hardware. The method is demonstrated by simulations of a three-phase ac motor controller in both software- and processor-in-loop configurations. The simulations are verified by laboratory results obtained using the tuned microcontroller hardware to implement a control system for a 3-phase ac motor.

关键词： power electronics microcontrollers software-in-loop processor-in-loop power system simulation

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Control Systems Testing with a Flexible Co-simulation Interface to PSCAD/EMTDC 22

Control Systems Testing with a Flexible Co-simulation Interf...

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22nd National Power Systems Conference (NPSC)

作者： Damle, Ashwin Nayak, Om Gole, Aniruddha Sinkar, Ajinkya Nayak Power Syst Pvt Ltd Thana India Nayak Corp Princeton NJ USA Univ Manitoba Winnipeg MB Canada

ISBN: (纸本)9781665462020

This paper discusses a general-purpose co-simulation interface to a non-real-time electromagnetic transient (EMT) simulation software called PSCAD. The interface uses embedded Python interpreter which supplements the EMT capabilities with powerful mathematical functions and scripting facilities. The co-simulation is demonstrated with an example of controls implemented in Python running on a personal computer (PC) as well as the same controls running on a Raspberry Pi Pico microcontroller via an interrupt-based processor-in-loop (PIL) version of the interface. The PIL platform allows for rapid development, validation, testing, and prototyping of the control algorithm on a hardware platform. The paper presents the advantages of performing PIL co-simulation using a powerful scripting language such as Python embedded into an EMT simulation. It includes comprehensive details of the interface along with controller source code to help readers implement it. The power systems example used to demonstrate the interface is a boost converter implemented in PSCAD.

关键词： PSCAD EMT simulation Co-simulation Pico Python processor-in-loop Boost converter Controller prototyping

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Non-real-time hardware-in-loop electromagnetic transient simulation of microcontroller-based power electronic control systems

Non-real-time hardware-in-loop electromagnetic transient sim...

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IEEE Power and Energy Society General Meeting

作者： Gregory Chongva Shaahin Filizadeh University of Manitoba

ISBN: (纸本)9781479913022

This paper introduces a new method of modeling microcontroller-based systems in a non-real-time electromagnetic transient (EMT) simulation. Presently, power electronic control system simulation relies chiefly on either simplified control block models in a non-real-time simulator or real-time hardwarein- loop simulation. Migrating control block models from the simulated design to actual microcontroller hardware requires significant additional effort. Real-time hardware-in-loop simulation requires complex interfacing using costly real-time hardware. The method described in this paper replaces control system blocks in non-real-time simulation with actual microcontroller code. The method enables both software-in-loop simulation and processorin- loop co-simulation, eliminates the drawbacks of the simulation methods described above, and allows direct optimization of the actual controller hardware. The method is demonstrated by simulations of a three-phase ac motor controller in both softwareand processor-in-loop configurations. The simulations are verified by laboratory results obtained using the tuned microcontroller hardware to implement a control system for a 3-phase ac motor.

关键词： power electronics microcontrollers software-inloop processor-in-loop power system simulation Microcontrollers Power system simulation Power electronics Electromagnetic transients simulating control systems HARDWARE IN THE loop control block Computer hardware AC motors analog approach

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