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Power Electronics Converters Applications And Design

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A Novel Multi Stage Transformer for Compensating Unbalanced Loads

Power systems based on centralized production are facing two limitations: the lack of fossil fuels and the need to reduce pollution; Therefore, the importance of distributed generation resources (DGs) has increased by connecting renewable energy systems to the network. With the increasing penetration of renewable energies in the network, power quality challenges in low voltage and medium voltage distribution systems have become one of the main fields of studies. Since most of the renewable energy systems are connected to the network with the help of electronic power converters devices and the main purpose of these converters is to connect DGs to the network in compliance with power quality standards; Therefore, if the switching frequency of inverters is not implemented properly, major power quality problems will be created. On the other hand, the reduction in power quality causes acute problems in power networks, which include lack of proper performance, reduction in useful life and efficiency of electrical and electronic devices in the network, creation of series and parallel resonance in some harmonics due to the presence of inductors and the capacitor, and as a result, more distortion in the voltage of the distribution network. This paper actually provides a road-map for researchers to investigate power quality issues. In other words, the mentioned cases show the importance of research and providing the solutions to improving power quality in distribution networks. 

An Overview on Power Quality Issues and Control Strategies for Distribution Networks With the Presence of Distributed Generation Resources

Power systems based on centralized production are facing two limitations: the lack of fossil fuels and the need to reduce pollution; Therefore, the importance of distributed generation resources (DGs) has increased by connecting renewable energy systems to the network. With the increasing penetration of renewable energies in the network, power quality challenges in low voltage and medium voltage distribution systems have become one of the main fields of studies. Since most of the renewable energy systems are connected to the network with the help of electronic power converters devices and the main purpose of these converters is to connect DGs to the network in compliance with power quality standards; Therefore, if the switching frequency of inverters is not implemented properly, major power quality problems will be created. On the other hand, the reduction in power quality causes acute problems in power networks, which include lack of proper performance, reduction in useful life and efficiency of electrical and electronic devices in the network, creation of series and parallel resonance in some harmonics due to the presence of inductors and the capacitor, and as a result, more distortion in the voltage of the distribution network. This paper actually provides a road-map for researchers to investigate power quality issues. In other words, the mentioned cases show the importance of research and providing the solutions to improving power quality in distribution networks.

https://doi.org/10.1109/access.2023.3238685

Enhancement of power quality using U-SOGI based control algorithm for DSTATCOM

A novel method for controlling the current source converter (CSC) based D-STATCOM is presented in this paper using with Fuzzy-PI controller for mitigation of voltage sag, improvement of THD of source current, load current, load voltage and also maintains DC link Voltage profile. The model has been tested and simulated in MATLAB/SIMULINK environment. The simulation result under normal and change in load conditions has been studied without and with D-STATCOM.

Power Quality Improvement using Fuzzy-PI Controlled D-STATCOM

The proposed Icos⁡ϕ control technique has been applied for power quality improvement using different configurations of system with distribution static compensator (DSTATCOM). Modeling, design and control of DSTATCOM are analysed in detial. Three phase reference current are extracted with this technique. The proposed technique has been used for power factor enhancement, voltage regulation, harmonic suppression and load balancing under dynamic condition with non-linear load. The proposed control is very effective for three different configurations of system with DSTATCOM for power quality improvement. Results for each configuration of system with DSTATCOM are simulated using MATLAB/Simulink sim power tool box. For teaching the power quality course, these can also be helpful.

Performance evaluation of different configurations of system with DSTATCOM using proposed Icos⁡ϕ technique

this adaptive control technique has been developed for four-leg VSC based DSTATCOM using MATLAB Simulink environment and implemented in three phase four wire distribution systems. In this technique three reference currents are estimated from fundamental active power component of three distorted load currents. The performance of DSTATCOM found satisfactory in terms of load balancing, power factor improvement, source current harmonic elimination, and self-regulated DC bus voltage using adaptive control technique under steady state and dynamic condition using nonlinear load.

Adaptive Control Algorithm for DSTATCOM in three phase four wire distribution systems for Power Quality Improvement

This paper presents three different topologies for D-STATCOM forimprovement of power factor in distribution network. Comparative analysis of different system topologies of D-STATCOM have been performed for power factor correction. The models are simulated in MATLAB for unbalanced and nonlinear load in a distribution system. The D-STATCOM is implemented with PWM current controlled six leg voltage source converter (IGBT based CSC) and switching patterns are generated through Synchronous Reference Frame Theory (SRFT).

Atma Ram

Papers

Power Quality Improvement using Fuzzy-PI Controlled D-STATCOM

Performance evaluation of different configurations of system with DSTATCOM using proposed Icos⁡ϕ technique

Adaptive Control Algorithm for DSTATCOM in three phase four wire distribution systems for Power Quality Improvement

Enhancement of power quality using U-SOGI based control algorithm for DSTATCOM

Comparative analysis of different system topologies for a fuzzy controlled d-statcom for power factor correction