Microgrid influence on power quality of distribution system and its solution

2014 ◽  
Author(s):  
Wanwan Xu ◽  
Cheng Yan ◽  
Bin Wang
Keyword(s):  
Power Quality ◽  
Distribution System

scholarly journals Fuzzy Logic Controller Based DVR For Power Quality Improvement under Different Power Disturbances with Non-Linear Loads

2019 ◽  
Vol 15 (2) ◽  
pp. 50-60
Author(s):  
Abdul-Jabbar Ali ◽  
Wael Zayer ◽  
Samhar Shukir
Keyword(s):  
Fuzzy Logic ◽  
Electric Power ◽  
Power Quality ◽  
Distribution System ◽  
Fuzzy Logic Controller ◽  
Electric Power Industry ◽  
Power Distribution System ◽  
Non Linear ◽  
Power Disturbances

The power quality problems can be defined as the difference between the quality of power supplied and the quality of power required. Recently a large interest has been focused on a power quality domain due to: disturbances caused by non-linear loads and Increase in number of electronic devices. Power quality measures the fitness of the electric power transmitted from generation to industrial, domestic and commercial consumers. At least 50% of power quality problems are of voltage quality type. Voltage sag is the serious power quality issues for the electric power industry and leads to the damage of sensitive equipments like, computers, programmable logic controller (PLC), adjustable speed drives (ADS). The prime goal of this paper is to investigate the performance of the Fuzzy Logic controller based DVR in reduction the power disturbances to restore the load voltage to the nominal value and reduce the THD to a permissible value which is 5% for the system less than 69Kv. The modeling and simulation of a power distribution system have been achieved using MATLABL/Simulink. Different faults conditions and power disturbances with linear and non-linear loads are created with the proposed system, which are initiated at a duration of 0.8 sec and kept till 0.95 sec.

scholarly journals The Impact of Location and Size of the Wind Technology on Power Quality in a Distribution System with Different Loads

2019 ◽  
Vol 9 (1) ◽  
pp. 1909-1914
Keyword(s):  
Power Quality ◽  
Distribution System ◽  
Quality Parameters ◽  
Loss Reduction ◽  
Voltage Profile ◽  
Current Harmonics ◽  
Voltage Unbalance ◽  
The Impact ◽  
Voltage Profile Improvement

The impact of wind technology on power quality for a distribution system is emphasized in this paper. The Power Quality of a Distribution system depends on voltage and Frequency quality. The pros of integrating the wind turbine to the system are loss reduction and voltage profile improvement but the cons of adding renewable energy to the distribution system are represented in this paper. such as voltage unbalance, flicker, power factor, and the impact of voltage and current harmonics are measured. The performed analysis results indicated the importance of the integration of DG based on Power quality Parameters.

scholarly journals Optimal Selection of Metering Points for Power Quality Measurements in Distribution System

Energies ◽  
2021 ◽  
Vol 14 (4) ◽  
pp. 1202
Author(s):  
Krzysztof Piatek ◽  
Andrzej Firlit ◽  
Krzysztof Chmielowiec ◽  
Mateusz Dutka ◽  
Szymon Barczentewicz ◽  
...  
Keyword(s):  
State Estimation ◽  
Power Quality ◽  
Power Distribution ◽  
Distribution System ◽  
Distribution Systems ◽  
Optimal Selection ◽  
Power Distribution Systems ◽  
Observability Analysis ◽  
Selection Of

Quality of power supply in power distribution systems requires continuous measurement using power quality analyzers installed in the grid. The paper reviews the published methods for optimal location of metering points in distribution systems in the context of power quality metering and assessment. Three methods have been selected for detailed analysis and comparative tests. It has been found that utilization of the methods is possible, but their performance varies highly depending on the test grid’s topology. Since the methods rely on the state estimation approach, their performance is strictly related to observability analysis. It has been found that standard observability analysis used for typical state estimation problem yields ambiguous results when applied to power quality assessment. Inherited properties of the selected methods are also analyzed, which allows for the formulation of general recommendations about optimal selection of metering points in a distribution system.

scholarly journals Enhancing the Power Quality of the Grid Interactive Solar Photovoltaic-Electric Vehicle System

2021 ◽  
Vol 12 (3) ◽  
pp. 98
Author(s):  
Md Mujahid Irfan ◽  
Shriram S. Rangarajan ◽  
E. Randolph Collins ◽  
Tomonobu Senjyu
Keyword(s):  
Electric Vehicle ◽  
Power Quality ◽  
Distribution System ◽  
Control Technique ◽  
Grid Integration ◽  
Solar Photovoltaic ◽  
Shunt Active Power Filter ◽  
Power Filter ◽  
Neuro Fuzzy

Grid interactive solar photovoltaic (PV) and electric vehicle (EV) systems are the emerging technologies nowadays, mainly due to energy cost reduction and minimization of emission levels. Various research surveys have presented the effect of grid integration of PVs and EVs in an isolated way. However, it is worth accepting that with the continuous emergence of PVs and EVs, the power grid is experiencing the combined effect of PV–EV integration. The distribution system network of EVs impacts the power quality of the grid. In this paper, shunt active power filter is modelled using neuro-fuzzy control technique for the mitigation of harmonics using MATLAB. The improvement in the system performance is analyzed and compared with the traditional compensation techniques.

scholarly journals Power Quality Improvement Using Unified Power Quality compensator

2021 ◽  
Vol 10 (4) ◽  
pp. 2803-2809
Keyword(s):  
Power Systems ◽  
Power Quality ◽  
Distribution System ◽  
Supply Voltage ◽  
Voltage Sag ◽  
Harmonic Currents ◽  
Power Quality Improvement ◽  
Power Quality Disturbances ◽  
Quality Of Electric Power

Power quality has become an important factor in power systems, for consumer and household appliances with proliferation of various electric/ electronic equipment and computer systems. The main causes of a poor power quality are harmonic currents, poor power factor, supply voltage variations, etc. In recent years the demand for the quality of electric power has been increased rapidly. Power quality problems have received a great attention nowadays because of their impacts on both utilities and customers. Voltage sag, swell, momentary interruption, under voltages, over voltages, noise and harmonics are the most common power quality disturbances.It proposes a new connection for a unified power quality compensator (UPQC) to improve the power quality of two feeders in a distribution system. It illustrates how UPQC can improve the power quality by mitigating all these PQ disturbances. The proposed configuration of the UPQC is developed and verified for various power quality disturbances by simulating the mode using MATLAB.

scholarly journals Perfprmance Analysis on Power Flow of a Three-Feeder/Multi-Bus Distribution System Using Gupqc

2021 ◽  
Vol 23 (06) ◽  
pp. 1383-1395
Author(s):  
Avanish Tripathi ◽  
◽  
Dr. Imran ◽  
Keyword(s):  
Power Quality ◽  
Distribution System ◽  
Power Flow ◽  
Voltage Source ◽  
Voltage Source Converters ◽  
Quality Of Supply ◽  
The Common ◽  
Power Quality Conditioner ◽  
The One

Power flow in any distribution system either it is multi-bus or three feeders explain by a Generalized Unified Power Quality Conditioner i.e. GUPQC.On the one side, that is DC side is connected with the common DC link capacitor which is also coupled consecutively through 3 voltage source converters. This is the simple block realization of GUPQC. This multi feeder is explained where one feeder is controlled by a parallel compensator and the next two feeders are controlled through the proposed series compensator. This technique i.e. GUPQC makes the feeder distribution free from harmonic and voltage-current compensation etc randomly. Also, it can improve the quality of supply power given to another consumer. A vast and huge study of Simulation is helped to how MATLAB/SIMULINK is used for making this type of GUPQC. Disrupted Voltage, current, and power quality issues can be easily improved in this technique.

scholarly journals Power Quality Enhancement Using DSTATCOM in Industry Plants

2020 ◽  
Vol 5 (1) ◽  
pp. 157-175
Author(s):  
Atinkut Bayu
Keyword(s):  
Power Quality ◽  
Power Factor ◽  
Power Distribution ◽  
Distribution System ◽  
Reactive Power ◽  
Harmonic Distortion ◽  
Power Distribution System ◽  
Load Voltage ◽  
Voltage Unbalance

AbstractThis paper is focused on increasing the power quality of Unique Macaroni factory, located in Bahir Dar Town. Necessary data have been collected from the factory and the collected data are analysed. Based on the analysis of data, it is found that the factory working power factor is low and hovering around 0.7125. Voltage variations are up to 9.09%, average voltage unbalance is 2.2% and total harmonic distortion (THD) of load currents and voltage are 24.17% and 10.16%, respectively. Harmonic components have existed in the power distribution system of the factory. Based on the analysis of power quality problem in the factory, distribution static compensator (DSTATCOM) and its control system have been designed to boost power quality of the factory and the results are obtained by generating simulations using Matlab software. It is observed from outputs of the Matlab simulations that DSTATCOM can improve the power quality of the factory. Generally, the shape of the waveform of load voltage and current is improved and THD level of load voltage is minimised to 1.55% and load current THD level is 7.09%. The reactive power needed by the loads (442 kVAr) is almost provided by the DSTATCOM, so reactive power from source supply is very small such as 22 kVAr so that the power factor of the source tends to unity.

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