scholarly journals Modelling and Performance Analysis of a DSTATCOM using ISCT Control Technique

2021 ◽  
Vol 9 (8) ◽  
pp. 1079-1085
Keyword(s):  
Performance Analysis ◽  
Power Quality ◽  
Reactive Power ◽  
Digital Simulation ◽  
Control Technique ◽  
Matlab Simulink ◽  
Non Linear ◽  
Quality Issues ◽  
And Performance ◽  
Bus Voltage

This paper chiefly deals with the performance of DSTATCOM as a load compensator. For enhancing the power quality and so as to mitigate harmonics it is employed on the load side. The reactive power is absorbed or generated by DSTATCOM by regulating the bus voltage. The most reason for occurring of the power quality issues is because of the non-liner loads that were employed by the consumers. DSTATCOM works as inductive or capacitive modes basing on the system voltage. The analysis is performed on the issues in the distribution side by employing the DSTATCOM compensation in this paper. In this paper,we had adopted Instantaneous Symmetrical Compound Theory (ISCT) controller to mitigate harmonics on the source side. The harmonics are due to the increase in the usage of non-linear loads by the consumers. The DSTATCOM regulates the bus voltage by absorbing or generating reactive power. The results are extracted using extensive digital simulation performed in MATLAB/SIMULINK environment.

scholarly journals Fractional Order Controller for Non-linear Current Control Technique

2019 ◽  
Vol 9 (2) ◽  
pp. 873-877
Keyword(s):  
Power Quality ◽  
Fractional Order ◽  
Real World ◽  
Reactive Power ◽  
Pi Controller ◽  
Current Control ◽  
Control Technique ◽  
Transient Condition ◽  
Integral Control ◽  
Non Linear

linear and Non-Linear controller shows their best performance under different power quality conditions. However, under sub transient condition these controller shows sluggish performance. This paper introduces the application of Fractional order [FO] controller in real world power system phenomena. FO-controller based on proportional integral control action was used here for grid interconnection of inverter. Different power quality issues such as Real & Reactive Power exchange between renewable source and grid have been presented here. Matlab Simulink model was developed for a real-world grid connected model in order to check the robustness of the controller. A comparison between the PI controller and FO-PI controller was presented in this paper

scholarly journals Design and Performance Analysis of Grid Connected Photovoltaic (GCPV) based DSTATCOM for Power Quality Improvements

2021 ◽  
Vol 1878 (1) ◽  
pp. 012032
Author(s):  
N H Baharudin ◽  
M A H Ridzwan ◽  
T M N T Mansur ◽  
R Ali ◽  
K Ananda-Rao ◽  
...  
Keyword(s):  
Performance Analysis ◽  
Power Quality ◽  
Quality Improvements ◽  
And Performance

Power Quality Issues and Solutions – Review

2015 ◽  
Vol 16 (4) ◽  
pp. 357-384 ◽  
Author(s):  
Suresh Mikkili ◽  
Anup Kumar Panda
Keyword(s):  
Power Quality ◽  
Power Distribution ◽  
Distribution Systems ◽  
Reactive Power ◽  
Electrical Power ◽  
Economic Loss ◽  
Nonlinear Loads ◽  
Broad Perspective ◽  
Three Phase ◽  
Quality Issues

Abstract Electrical power quality has been an important and growing problem because of the proliferation of nonlinear loads such as power electronic converters in typical power distribution systems in recent years. Particularly, voltage harmonics and power distribution equipment problems result from current harmonics produced by nonlinear loads. The Electronic equipment like, computers, battery chargers, electronic ballasts, variable frequency drives, and switch mode power supplies, generate perilous harmonics and cause enormous economic loss every year. Problems caused by power quality have great adverse economic impact on the utilities and customers. Due to that both power suppliers and power consumers are concerned about the power quality problems and compensation techniques. Power quality has become more and more serious with each passing day. As a result active power filter gains much more attention due to excellent harmonic and reactive power compensation in two-wire (single phase), three-wire (three-phase without neutral), and four-wire (three-phase with neutral) ac power networks with nonlinear loads. However, this is still a technology under development, and many new contributions and new control topologies have been reported in the last few years. It is aimed at providing a broad perspective on the status of APF technology to the researchers and application engineers dealing with power quality issues.

scholarly journals Enhancing the LVRT Capability and Mitigation of Power Quality Issues Using UPQC of a Grid Connected Wind Conversion System

2017 ◽  
Vol 7 (3) ◽  
pp. 643
Author(s):  
C.S Boopathi ◽  
Kuppusamy Selvakumar ◽  
Avisek Dutta
Keyword(s):  
Power Quality ◽  
Reactive Power ◽  
Low Voltage ◽  
Active Filter ◽  
Shunt Active Filter ◽  
Unified Power Quality Conditioner ◽  
Conversion System ◽  
Quality Issues ◽  
Power Quality Conditioner ◽  
Doubly Fed

In this paper unified power quality conditioner has been used to enhance low voltage ride through capability of grid connected wind conversion system taking Doubly fed induction generator (DFIG). Unified Power quality conditioner (UPQC) device is a combination of series active filter and shunt active filter. This custom power device is mainly used to mitigate power quality issues which is an essential factor today because of wide application of power electronics devices. UPQC is capable to deal with voltage and current imperfection simultaneously. It is installed in the system mainly to improve the power quality i.e. Voltage sag/swell, Harmonics, reactive power compensation etc. at point of common coupling. System is modeled in MATLAB/SIMULINK and results shows utilization of UPQC for the enhancement of LVRT of a DFIG wind system according to Grid code. when fault occurs in the system, it will create voltage dip and series compensator of UPQC injects during this time to prevent disconnection from grid and stay connected to contribute during fault. UPQC is also used for fast restoration of system steady state, power factor improvement, prevent rotor over current.

scholarly journals Non-Linear Control for Variable Resistive Bridge Type Fault Current Limiter in AC-DC Systems

Energies ◽  
2019 ◽  
Vol 12 (4) ◽  
pp. 713 ◽  
Author(s):  
Md Alam ◽  
Mohammad Abido ◽  
Alaa Hussein
Keyword(s):  
Reactive Power ◽  
Effective Resistance ◽  
Linear Control ◽  
Control Technique ◽  
Fault Current ◽  
Fault Current Limiter ◽  
Linear Controller ◽  
Non Linear ◽  
Bridge Type ◽  
Current Limiter

This paper proposes a non-linear control-based variable resistive bridge type fault current limiter (VR-BFCL) as a prospective solution to ease the effect of disturbances on voltage source converter-based high voltage DC (VSC-HVDC) systems. A non-linear controller for VR-BFCL has been developed to insert a variable optimum resistance during the inception of system disturbances in order to limit the fault current. The non-linear controller takes the amount of DC link voltage deviation as its input and provides variable duty to generate a variable effective resistance during faults. The VSC-HVDC system’s real and reactive power controllers have been developed based on a current control loop where direct axis and quadrature axis currents are used to control the active and reactive power, respectively. The efficacy of the proposed non-linear control-based VR-BFCL solution has been proved with balanced as well as unbalanced faults. The results confirm that the oscillations in active power and DC link voltage have been significantly reduced by limiting the fault current through the insertion of an optimum effective resistance with the proposed control technique. The real time digital simulator (RTDS) has been used to implement the proposed approach. The performance of the proposed non-linear control based VR-BFCL is compared with that of traditional fixed duty control.

scholarly journals Droop Control in DQ Coordinates for Fixed Frequency Inverter-Based AC Microgrids

Electronics ◽  
2019 ◽  
Vol 8 (10) ◽  
pp. 1168 ◽  
Author(s):  
Mohamed Toub ◽  
Mehrzad M. Bijaieh ◽  
Wayne W. Weaver ◽  
Rush D. Robinett III ◽  
Mohamed Maaroufi ◽  
...  
Keyword(s):  
Reactive Power ◽  
Control Technique ◽  
Droop Control ◽  
Control Methods ◽  
Fixed Frequency ◽  
Active And Reactive Power ◽  
Bus Voltage ◽  
High Level ◽  
System Frequency ◽  
Frequency Inverter

This paper presents a proof-of-concept for a novel dq droop control technique that applies DC droop control methods to fixed frequency inverter-based AC microgrids using the dq0 transformation. Microgrids are usually composed of distributed generation units (DGUs) that are electronically coupled to each other through power converters. An inherent property of inverter-based microgrids is that, unlike microgrids with spinning machines, the frequency of the parallel-connected DGUs is a global variable independent from the output power since the inverters can control the output waveform frequency with a high level of precision. Therefore, conventional droop control methods that distort the system frequency are not suitable for microgrids operating at a fixed frequency. It is shown that the proposed distributed droop control allows accurate sharing of the active and reactive power without altering the microgrid frequency. The simulation and hardware-in-the-loop (HIL) results are presented to demonstrate the efficacy of the proposed droop control. Indeed, following a load change, the dq droop controller was able to share both active and reactive power between the DGUs, whereas maintaining the microgrid frequency deviation at 0% and the bus voltage deviations below 6% of their respective nominal values.

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