Power Quality Improvement Using Multi-level Inverter based DVR and DSTATCOM Using Neuro-fuzzy Controller

2017 ◽  
Vol 8 (1) ◽  
pp. 316 ◽  
Author(s):  
G. Ramya ◽  
V. Ganapathy ◽  
P. Suresh
Keyword(s):  
Power Distribution ◽  
Phase Shifter ◽  
Reactive Power ◽  
Fuzzy Controller ◽  
Effective Means ◽  
Voltage Sag ◽  
Neuro Fuzzy ◽  
Facts Controllers ◽  
In Series ◽  
Bus Voltage

STATCOM is one of the shunt type FACTS controllers which can supply reactive power and improve bus voltage. STATCOM, a controlling device used on alternating current transmission networks, has advantages like transient free switching and smooth variation of reactive power. This paper proposes a cascaded multilevel inverter type DSTATCOM and DVR to compensate voltage sag in utilities in power distribution network. The proposed DSTATCOM is implemented using multilevel topology with isolated dc energy storage and reduced number of switches. A DVR injects a voltage in series with the system voltage and a D-STATCOM implant a current into the system to correct the voltage sag, swell and interruption. The phase shifter PWM technique is described to generate firing pulse to cascaded inverter. The proposed neuro-fuzzy controller follow itself to the sag and provides effective means of mitigation. The voltage sag with the minimum harmonic at the efficacy end. The proposed technique is simulated using MATLAB/Simulink.

A Neuro-Fuzzy Controller for Compensation of Voltage Disturbance in SMIB System

2017 ◽  
Vol 5 (1) ◽  
pp. 72
Author(s):  
Budi Srinivasarao ◽  
G. Sreenivasan ◽  
Swathi Sharma
Keyword(s):  
Power Quality ◽  
Power Distribution ◽  
Fuzzy Controller ◽  
Quality Issue ◽  
Simulink Model ◽  
Neuro Fuzzy ◽  
Current Voltage ◽  
Control Circuits ◽  
Electrical Loads

Since last decade, due to advancement in technology and increasing in the electrical loads and also due to complexity of the devices the quality of power distribution is decreases. A Power quality issue is nothing but distortions in current, voltage and frequency that affect the end user equipment or disoperation; these are main problems of power quality so compensation for these problems by DPFC is presented in this paper. The control circuits for DPFC are designed by using line currents, series reference voltages and these are controlled by conventional Neuro-Fuzzy controllers. The results are observed by MATLAB/SIMULINK model.

Optimization of Reactive Power Distribution in Series PV-Battery-Hybrid Systems

2021 ◽  
Author(s):  
Yiwei Pan ◽  
Ariya Sangwongwanich ◽  
Yongheng Yang ◽  
Frede Blaabjerg
Keyword(s):  
Hybrid Systems ◽  
Power Distribution ◽  
Reactive Power ◽  
In Series

scholarly journals Innovative Detection of Isolation and Recombination Technique with Micro Grid

2019 ◽  
Vol 9 (1) ◽  
pp. 6829-6836
Keyword(s):  
Distributed Generation ◽  
Reactive Power ◽  
Voltage Sag ◽  
Phase Jump ◽  
Innovative Technique ◽  
Point Of Common Coupling ◽  
In Series ◽  
Common Coupling ◽  
Power Quality Conditioner

An innovative technique of the Unified power quality conditioner for the location, control and integration in the Distributed generation which is based on autonomous and grid connected µg system is proposed and simulated. At Point of Common Coupling, DG converters that has storage andshunt part of APFof UPQC are connected. Before the PCC, the grid and the series part of the UPQC APFare connected in series. Also the DC link is integrated with energy storage. As a secondary mode of control, an innovative technique is introduced in UPQC for the detection of isolation and recombination inµg. Henceforth, it is described as innovative detection of isolation and recombination technique. In this system an effectual method is used for proper functioning of the recombination and isolation detection. Along with the increase in the quality of the power in terms of voltage sag/swell, compensation of the reactive power and harmonics in recombination mode, additionally it compensates voltage interruption over normal UPQC and also DG converter remains connected during the conditions of disturbances in voltage and also phase jump. The performance of the UPQC is simulated and results are analysed.

scholarly journals Voltage Sag, Voltage Swell and Harmonics Reduction Using Unified Power Quality Conditioner (UPQC) Under Nonlinear Loads

2021 ◽  
Vol 17 (2) ◽  
pp. 140-150
Author(s):  
Ahmed Qasim ◽  
Fadhil Tahir ◽  
Ahmed Alsammak
Keyword(s):  
Power Quality ◽  
Power Distribution ◽  
Reactive Power ◽  
Supply Voltage ◽  
Harmonic Distortion ◽  
Distribution Networks ◽  
Unit Vector ◽  
Voltage Sag ◽  
Nonlinear Loads ◽  
Voltage Swell

In light of the widespread usage of power electronics devices, power quality (PQ) has become an increasingly essential factor. Due to nonlinear characteristics, the power electronic devices produce harmonics and consume lag current from the utility. The UPQC is a device that compensates for harmonics and reactive power while also reducing problems related to voltage and current. In this work, a three-phase, three-wire UPQC is suggested to reduce voltage-sag, voltage-swell, voltage and current harmonics. The UPQC is composed of shunt and series Active Power Filters (APFs) that are controlled utilizing the Unit Vector Template Generation (UVTG) technique. Under nonlinear loads, the suggested UPQC system can be improved PQ at the point of common coupling (PCC) in power distribution networks. The simulation results show that UPQC reduces the effect of supply voltage changes and harmonic currents on the power line under nonlinear loads, where the Total Harmonic Distortion (THD) of load voltages and source currents obtained are less than 5%, according to the IEEE-519 standard.

Based on STATCOM in Power Distribution System Design and Simulation

2012 ◽  
Vol 220-223 ◽  
pp. 1249-1253 ◽  
Author(s):  
Qi Chao Zhang
Keyword(s):  
Power Distribution ◽  
Distribution System ◽  
Reactive Power ◽  
Control Method ◽  
Effective Means ◽  
Fast Response ◽  
Current Control ◽  
Power Distribution System ◽  
Line Loss ◽  
Node Voltage

The basic role of the STATCOM are continuous and rapid control of reactive power, fast response, issued or absorb reactive power to control the transmission system it is connected to the node voltage, inhibition of harmonic pollution, reduce line loss. The development of STATCOM is to solve the problem of voltage stability and effective means, is the main development direction of DFACTS technology. According to the direct current control method to design compensation device, emphatically introduces the device main circuit design step and process, and use MATLAB software simulation, the feasibility of the design is proved.

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