Using Unified Power Quality Conditioner Research Articles

Power Quality and Low Voltage Ride Through Capability Enhancement in Wind Energy System Using Unified Power Quality Conditioner (UPQC)

The various approaches used to improve the Low Voltage Ride Through (LVRT) capabilities of DFIG-based wind turbine systems are investigated in this study (WT). The Type-III WT machine, which is primarily based on DFIG, is connected to the grid without a digital power interface, resulting in unmanageable terminal voltage or reactive electricity output. As a consequence, novel LVRT approaches based on the deployment of additional active interface technologies were given in this work. The problem of low voltage faults is now being addressed using a variety of approaches. By analyzing LVRT approaches for DFIG-based WECS, this research attempts to discover such working ways by bridging the gap in terms of overall adaptive performance, operative complexity of controllers, and cost-effectiveness. This study suggests ways to improve LVRT's ability to rely on the relationship arrangement in three major areas based on their grid integrations. The wind turbine system is connected to a DVR, STATCOM, and UPQC in this study for active and reactive power regulation throughout the fault detection procedure. Using UPQC with SRF theory offers improved reaction during faults to increase active power and maximum compensation in reactive power with synchronous reference frame and without synchronous reference frame operation presented in this paper.

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

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.

RETRACTED ARTICLE: Improvised deep learning techniques for the reliability analysis and future power generation forecast by fault identification and remediation

A comprehensive method for the detection, recognition, and the remediation process for effective storage of generated power from renewable energy sources like solar panel and wind turbine was implemented. In tradition system, machine learning technique is applied for the prediction purpose. However there were some limitations like reduced rate of accuracy and reliability performance. So as to overcome this, an effective deep learning technique is implemented along with optimization. The integration of OCP server with Local SCADA system is made in this proposed approach which is then followed by deep learning based prediction technique for effective storage in cloud. Initially, the input source is being initialized. Then the optimization of the power generation is made with the use of Modified Grey wolf optimization approach (MGWO). From the optimized outcome, the fault analysis is recognized and identified by means of multipath residual convolutional neural network (CNN) classifier dependent fault detection and identification. The failure of solar panel and wind is predicted and notification is triggered. A fault remediation process is carried with the use of Discriminative Gradient approach to maintain the system at the safe condition for operation till the error or fault has been rectified completely. Generalized Regression Neural Network is employed for the future power generation forecast. Eventually, the liability will be eradicated using this proposed system using Unified Power quality conditioner (UPQC) controller that integrates MGWO based data mining analysis. The errors and distortion are rectified, and the power stabilized is then kept in three-phase grid. At last, the information is being transmitted by means of cloud for the purpose of future monitoring. The performance and reliability analysis are also made is carried out to prove the effectiveness of proposed mechanism and the outcomes were compared with existing techniques.

Performance Improvement of a Distributed Generation System Using Unified Power Quality Conditioner

This paper deals with performance improvement of a distributed generation (DG) system using unified power quality conditioner (UPQC). Despite of the several benefits of DG like excellent energy supply, reducing expansion of power distribution system, environmental friendly and so on, there are several challenges existing due to the integration of DG with the grid or operating it in standalone mode. Power quality (PQ) issue is one of the main technical challenges in DG power system. Moreover, harmonic and voltage sag compensation in a DG networks has significantly reduced PQ, which affects the stability of the system. Hence, in this paper, impact of PQ issues in an adopted standalone DG system (comprising of solar, wind and fuel cell based renewable energy sources) is investigated in the presence of UPQC. The realization of UPQC is carried out using conventional synchronous reference frame (SRF) and modified SRF (MSRF) techniques for reference current generation with pulse width modulation voltage source inverter technique for generation of pulses for the inverter along with a PI controller for regulation of DC-link capacitor voltage. The voltage sag compensation with current and voltage harmonics are estimated at different source (ideal and non-ideal) conditions with different control scheme like SRF and MSRF technique. The simulation model of conventional SRF and MSRF technique based UPQC is developed under MATLAB/SIMULINKR environment. The result obtained validates the superiority of proposed technique over others in terms of harmonics elimination and sag compensation.

Power quality assessment of a solar PV and fuel cell-based distributed generation system using unified power quality conditioner

ABSTRACT This paper deals with power quality (PQ) analysis of distributed generation (DG) system using unified power quality conditioner (UPQC). Despite of the several benefits of DG like excellent energy supply, reducing expansion of power distribution system, environmental friendly and so on, there are several challenges existing due to the integration of DG with the grid or operating it in standalone mode. In order to provide improved PQ of energy supply, it is necessary to analyse the harmonics distortion of the system as well as the voltage sag and swell. This paper explores the detail of PQ impacts in a DG operates in stand-alone mode. The voltage sag compensation with current and voltage harmonics are estimated at varying load conditions with different control scheme like synchronous reference frame (SRF) and modified-SRF technique. The proposed model is developed in MATLAB/Simulink and the results obtained are compared to that of conventional technique.

Performances Analysis on Power Quality Problems Mitigation by using Unified Power Quality Conditioner (UPQC)

Nowadays, power quality is one of the major problems in electric power distribution system. The poor power quality at distribution level can affect the operation and performance of sensitive and critical loads. In the distribution systems, poor power quality results in various problems such as higher power losses, harmonics, sag and swells in the voltage, and poor power factor., etc. Unified Power Quality Conditioner (UPQC) is the only versatile device which can mitigate several power quality problems related with distribution system. A UPQC that combines the operations of a Distribution Static Compensator (D-STATCOM) and Dynamic Voltage Restorer (DVR) together with the shunt and series active control devices. UPQC can solve the problems related to the voltage/current harmonics, voltage sag/swell and unbalance in distribution system. To evaluate the performance improvement in the system, a model of UPQC is developed in MATLAB/SIMULINK with a typical distribution network. In this research, UPQC is applied for power quality enhancement of Myaungtagar industrial distribution substation, Myanmar. Enhancements in power quality by UPQC are evaluated under maximum load condition.Keywords—Power Quality, UPQC, Series Controller, Shunt controller, Harmonics

DSP-based identification, classification and mitigation of power quality disturbances using UPQC

ABSTRACTThis paper presents an experimental model of discrete wavelet transform (DWT) based identification, classification of power quality issues and its mitigation using unified power quality conditioner (UPQC). Here, the DWT technique is implemented for desired feature extraction of various power quality issues using digital signal processor (DSP) TMS320LF2403A. Power quality issues are classified using the J48 classifier. In addition, a laboratory model of UPQC is designed and developed to mitigate power quality problems in the single phase system. This model is a unique function of handling identification, classification and mitigation for various power quality problems, here the unit vector control scheme is implemented and it is found that UPQC effectively compensates voltage sag, voltage swell and harmonics.

REVIEW ON POWER QUALITY IMPROVEMENT BY USING UPQC

Today with increase in demand of electricity it is essential to have a good quality of power. As most of the load and power electronics equipment are nonlinear in nature many power quality problems like voltage sag ,voltage swell ,Harmonics, Voltage fluctuation, Flicker, gets introduced in System. UPQC(Unified Power Quality Conditioner)is one of the compensating device which consist of Shunta Series Active Power Filter Cascaded with dc link capacitor. This paper present review of UPQC to enhance Quality of Power at distribution level Along with overview of different types of UPQC.

Power Quality Profile Enhancement of Utility Connected Microgrid System Using ANFIS-UPQC

This paper investigates compensation of power quality issues of utility connected microgrid system using unified power quality conditioner (UPQC) device. A very important task on integration of utility and microgrid is the power flow management and compensation of power quality (PQ) distortions. Among all power quality distortions, the voltage drop and harmonic distortions are serious PQ distortion occur in the utility and customer side respectively. The UPQC is a promising device to compensate both utility and customer side PQ distortions. The compensation capability of the traditional UPQC device is limited by the DC link voltage regulation using conventional PI controller. In proposed control technique, the compensation capability of the UPQC device is enhanced by an adaptive neuro fuzzy inference system (ANFIS)based reference DC link voltage estimation and DC link voltage regulation. The ANFIS is trained off-line and implemented in the online simulation. Finally, the proposed ANFIS based UPQC is investigated for compensating PQ distortions originated in utility connected microgrid through an exhaustive simulation in MATLAB/SIMULINK platform.

PI CONTROLLER BASED OF MULTI-LEVEL UPQC USING DQ0 TRANSFORMATION TO IMPROVE POWER QUALITY IN DISTRBUTION SYSTEM

The aim of this paper is to improve power quality in the source side of distribution system using unified power quality conditioner (UPQC) by realization of cascaded multilevel inverter (MLI). The UPQC is an integration of series and shunt active power filters via common dc link which can mitigates various power quality issues like voltage sag, swell, harmonics, interruptions etc. The cascaded MLI offers low THD in the output waveform and flexible circuit layout. The sinusoidal pulse width modulation (SPWM) switching scheme is employed for better operation of MLI. The control mechanism of UPQC is derived from dq0 transformation which is simple in its design and gives better control characteristics. The PI controller can efficiently reduce the steady state error and this can be used in UPQC controller for better response. The regulation of source voltage in the distribution system using multilevel UPQC under nonlinear load condition is analyzed in MATLAB/SIMULINK environment.

IMPROVING POWER QUALITY IN MICROGRID BY MEANS OF USING POWER QUALITY CONDITIONER DEVICES

The micro grids and the utility grid expose to their inner disturbance such as harmonics, unbalances and other power quality noises. To better isolate the device from their respective noises power quality conditioner is recommended between each micro grid and the utility grid. The cooperative control for enhance voltage harmonics and unbalances in micro grids is mentioned. The power quality enhancement of grid-interactive micro grids is discussed and explained. Power quality problem is reduced by means of using Unified Power Quality Conditioner (UPQC) in grid-connected micro grids is introduced in order to reduce harmonics in transmission and improve the power quality in distribution. Power quality problem includes voltage unbalances and harmonics. Interline Power Quality Conditioner (IPQC) is proposed to improve the power quality in multiline by reducing the harmonics and also unbalances of power in feeders by the process of synchronization. Finally, the coordinated control of harmonics and unbalances in micro grids is simulated by using MATLAB and the satisfactory results are obtained.