scholarly journals An IDA-PBC Design with Integral Action for Output Voltage Regulation in an Interleaved Boost Converter for DC Microgrid Applications

Actuators ◽  
2021 ◽  
Vol 11 (1) ◽  
pp. 5
Author(s):  
Oscar Danilo Montoya ◽  
Federico Martin Serra ◽  
Walter Gil-González ◽  
Eduardo Maximiliano Asensio ◽  
Jonathan Emmanuel Bosso
Keyword(s):  
Output Voltage ◽  
Circuit Simulation ◽  
Piecewise Linear ◽  
Voltage Regulation ◽  
Electrical Circuit ◽  
Voltage Profile ◽  
Nonlinear Feedback ◽  
Dc Microgrid ◽  
Integral Action ◽  
Interleaved Boost Converter

This paper describes the output voltage regulation control for an interleaved connected to a direct current (DC) microgrid considering bidirectional current flows. The proposed controller is based on an interconnection and damping passivity-based control (IDA-PBC) approach with integral action that regulates the output voltage profile at its assigned reference. This approach designs a control law via nonlinear feedback that ensures asymptotic stability in a closed-loop in the sense of Lyapunov. Moreover, the IDA-PBC design adds an integral gain to eliminate the possible tracking errors in steady-state conditions. Numerical simulations in the Piecewise Linear Electrical Circuit Simulation (PLECS) package for MATLAB/Simulink demonstrate that the effectiveness of the proposed controller is assessed and compared with a conventional proportional-integral controller under different scenarios considering strong variations in the current injected/absorbed by the DC microgrid.

scholarly journals Thermal Mapping of Power Semiconductors in H-Bridge Circuit

2020 ◽  
Vol 10 (12) ◽  
pp. 4340 ◽  
Author(s):  
Dao Zhou ◽  
Yingzhou Peng ◽  
Francesco Iannuzzo ◽  
Michael Hartmann ◽  
Frede Blaabjerg
Keyword(s):  
Thermal Stress ◽  
Bridge Circuit ◽  
Circuit Simulation ◽  
Piecewise Linear ◽  
Factor Loading ◽  
Electrical Circuit ◽  
Junction Temperature ◽  
Modulation Method ◽  
Switching Frequency ◽  
Power Semiconductors

In this paper, a universal H-bridge circuit is used as a loading emulator to investigate the loss and thermal models of the power semiconductor. Based on its operation principle and modulation method, the dominating factors’ (e.g., power factor, loading current, fundamental frequency, and switching frequency) impact on the thermal stress of power semiconductors is considerably evaluated. The junction temperature in terms of the mean value and its swing is verified by using Piecewise Linear Electrical Circuit Simulation (PLECS) simulation and experimental setup. It helps to allocate the loading condition in order to obtain the desired thermal stress.

scholarly journals Adaptive Voltage Regulation Control Strategy in a Stand-Alone Islanded DC Microgrid based on distributed Wind / Photovoltaic / Diesel / Energy Storage Hybrid Energy Conversion System

2021 ◽  
Vol 5 (4) ◽  
pp. 26-33
Author(s):  
Adel Elgammal ◽  
Tagore Ramlal
Keyword(s):  
Intelligent Control ◽  
Reactive Power ◽  
Sliding Mode ◽  
Voltage Regulation ◽  
Sliding Mode Controller ◽  
Voltage Profile ◽  
Dc Microgrid ◽  
Hybrid Energy ◽  
Power Adjustment ◽  
Energy Conversion System

An adaptive approach for optimal tuning of a SMC for an automated voltage regulator system is displayed in this study. The approach is centered on hybrid of the GA and MOPSA. In addition, unique objective functions for the controller's parameter optimization are suggested. The performance of the resulting perfect sliding mode controller is confirmed by comparing it to controllers adjusted using various techniques that have been published in the literature. The simulation outcomes indicate that controllers tuned with the projected MOPSO and GA algorithms outperform controllers tuned with existing methods. In addition, a comparison study is performed to select the best controller for use in AVR systems. The suggested algorithm's major benefit is a considerable boost in convergence speed. With step changes and step load modifications in input wind power, the system model with built-in intelligent controller is generated in MATLAB/SIMULINK. The benefits of the recommended intelligent control algorithm are confirmed by comparing the outcomes of the sliding mode controller and the projected MOPSO self-tuned controller. The findings show that the hybrid Wind/PV system's reactive power adjustment capabilities. When used in conjunction with BES, it is extremely successful in optimising the voltage profile although providing active energy to local load.

scholarly journals Control Configurations for Reactive Power Compensation at the Secondary Side of the Low Voltage Substation by Using Hybrid Transformer

Energies ◽  
2021 ◽  
Vol 14 (3) ◽  
pp. 620
Author(s):  
Mohammed Radi ◽  
Mohamed Darwish ◽  
Gareth Taylor ◽  
Ioana Pisica
Keyword(s):  
Reactive Power ◽  
Low Voltage ◽  
Circuit Simulation ◽  
Piecewise Linear ◽  
Distribution Networks ◽  
Electrical Circuit ◽  
Distribution Transformer ◽  
Voltage Level ◽  
Transmission Grid ◽  
New Device

The high penetration of new device technologies, such as Electric Vehicles (EV), and Distributed Generation (DG) in Distribution Networks (DNs) has risen new consumption requirements. In this context, it becomes crucial to implement a flexible, functional and fast responsive management of the voltage level and Reactive Power (RP) in the DN. The latest improvements in the Solid State Switches (SSS) field demonstrate they can be used as a Power Electronic (PE) converter. In particular, they have been shown to be capable of operating synchronously with transformers, making the Hybrid Distribution Transformer (HT) concept a potential and cost-effective solution to various DN control issues. In this paper, a HT-based approach consisting of augmenting the conventional Low Voltage (LV) transformer with a fractionally rated PE converter for regulating and controlling the RP in the last mile of the DN is proposed. In this way, it is expected to meet the demand of the future DN from an efficiency, controllability and volume perspective. The proposed approach is implemented using a back-to-back converter. In addition, a power transfer control topology is used to implement the proposed control of the RP injection that controls the voltage level at the Direct Current (DC) link. The proposed approach has been demonstrated in different load scenarios using the Piecewise Linear Electrical Circuit Simulation (PLECS) tool. The simulation results show that the proposed approach can compensate the loads with their need from RP instead of feeding them from the transmission grid at the primary side of the Distribution Transformer (DT). In this way, the proposed approach is able to decrease the transferred amount of RP in the transmission lines.

Robust structured controller synthesis for interleaved boost converters using an H∞ control method

2021 ◽  
pp. 014233122110195
Author(s):  
Rıdvan Keskin ◽  
Ibrahim Aliskan ◽  
Ersin Daş
Keyword(s):  
Output Voltage ◽  
Control Method ◽  
Controller Design ◽  
Model Simulation ◽  
Voltage Regulation ◽  
Boost Converter ◽  
Controller Synthesis ◽  
Boost Converters ◽  
Type Iii ◽  
Interleaved Boost Converter

The regulation of output voltage and equivalent distribution of phase currents of multi-phase converters which have non-minimum phase characteristic are still challenges, especially in the presence of uncertainties in real parameters, duty cycle, input voltage, and load disturbances. However, in classical third-order integral-lead (Type-III) controller design methodologies, the controller is synthesized considering only the nominal performance conditions. This paper proposes a structured [Formula: see text] synthesis framework based on an optimization methodology to the design of a robust Type-III controller for interleaved boost converters. The structured [Formula: see text] control approach is adapted for optimization of Type-III feedback and feedforward controllers in two-degree-of-freedom (2-DOF) control system configuration. The robust stability of the closed-loop interleaved boost converter system against model uncertainties is ensured via the classical [Formula: see text]-analysis technique. Numerical comparisons are made among the classical, i.e. unstructured or full order, [Formula: see text]-based controller design method, a dual-loop PI controller, and proposed 1-DOF and 2-DOF structured controller synthesis approaches on an interleaved boost converter model. Simulation results verify the effectiveness and advantages of the proposed approach from the viewpoint of the output voltage regulation under different disturbance points.

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