scholarly journals Modeling and Analysis of STATCOM for Renewable Energy Farm to Improve Power Quality and Reactive Power Compensation

2021 ◽  
Vol 12 (1) ◽  
pp. 44
Author(s):  
Maria Tariq ◽  
Hina Zaheer ◽  
Tahir Mahmood
Keyword(s):  
Renewable Energy ◽  
Power Quality ◽  
Hybrid System ◽  
Distribution System ◽  
Reactive Power ◽  
Harmonic Distortion ◽  
Power Demand ◽  
Renewable Energy Resources ◽  
Voltage Profile ◽  
Current Controller

Power Quality (PQ) improvement in grid-integrated photovoltaic (PV) and wind energy hybrid systems for effective power transfer is presented in this paper. Due to interlinked hybrid renewable energy resources and nonlinear loads, various issues arise which affect the power quality, i.e., voltage sag, harmonic distortion increases, and also reactive power demand. In order to mitigate these issues, flexible alternating current transmission system (FACTS) devices are utilized. In this paper, hysteresis band current controller (HBCC)-based static synchronous compensator (STATCOM) is modeled to reduce PQ problems. HBCC is a robust and simple technique to improve voltage profile, reduce total harmonic distortion (THD) and fulfill the reactive power demand. Two case scenarios of the hybrid system, i.e., (I) grid integrated hybrid system without HBCC (II) grid integrated hybrid system with HBCC, are tested. Results demonstrate that under scenario II, load bus voltage is regulated at 1.0 p.u., THD of system voltage and current is reduced 0.25% and 0.35%, respectively, and reactive power demand of 30 kVAR is fulfilled. The HBCC was designed for reducing THD of the system with the limits specified by standards IEEE 519-1992 STATCOM using hysteresis band current controller to improve power quality in the distribution system which is simulated using MATLAB/SIMULINK. After that, the performance of the system is better in terms of power quality.

scholarly journals Optimal Harmonic Mitigation in Distribution Systems with Inverter Based Distributed Generation

2021 ◽  
Vol 11 (2) ◽  
pp. 774 ◽  
Author(s):  
Ahmed S. Abbas ◽  
Ragab A. El-Sehiemy ◽  
Adel Abou El-Ela ◽  
Eman Salah Ali ◽  
Karar Mahmoud ◽  
...  
Keyword(s):  
Power Quality ◽  
Distributed Generation ◽  
Distribution System ◽  
Distribution Systems ◽  
Renewable Energy Sources ◽  
Harmonic Distortion ◽  
Planning Problem ◽  
Voltage Profile ◽  
Harmonic Mitigation ◽  
The Impact

In recent years, with the widespread use of non-linear loads power electronic devices associated with the penetration of various renewable energy sources, the distribution system is highly affected by harmonic distortion caused by these sources. Moreover, the inverter-based distributed generation units (DGs) (e.g., photovoltaic (PV) and wind turbine) that are integrated into the distribution systems, are considered as significant harmonic sources of severe harmful effects on the system power quality. To solve these issues, this paper proposes a harmonic mitigation method for improving the power quality problems in distribution systems. Specifically, the proposed optimal planning of the single tuned harmonic filters (STFs) in the presence of inverter-based DGs is developed by the recent Water Cycle Algorithm (WCA). The objectives of this planning problem aim to minimize the total harmonic distortion (THD), power loss, filter investment cost, and improvement of voltage profile considering different constraints to meet the IEEE 519 standard. Further, the impact of the inverter-based DGs on the system harmonics is studied. Two cases are considered to find the effect of the DGs harmonic spectrum on the system distortion and filter planning. The proposed method is tested on the IEEE 69-bus distribution system. The effectiveness of the proposed planning model is demonstrated where significant reductions in the harmonic distortion are accomplished.

scholarly journals Experimental Assessment of a Centralised Controller for High-RES Active Distribution Networks

Energies ◽  
2018 ◽  
Vol 11 (12) ◽  
pp. 3364 ◽  
Author(s):  
Francisco García-López ◽  
Manuel Barragán-Villarejo ◽  
Alejandro Marano-Marcolini ◽  
José Maza-Ortega ◽  
José Martínez-Ramos
Keyword(s):  
Renewable Energy ◽  
Distribution System ◽  
Reactive Power ◽  
Renewable Energy Sources ◽  
Distribution Networks ◽  
Energy Sources ◽  
Renewable Energy Resources ◽  
Real Time Control ◽  
Control Actions ◽  
Active Distribution Networks

This paper assesses the behaviour of active distribution networks with high penetration of renewable energy sources when the control is performed in a centralised manner. The control assets are the on-load tap changers of transformers at the primary substation, the reactive power injections of the renewable energy sources, and the active and reactive power exchanged between adjacent feeders when they are interconnected through a DC link. A scaled-down distribution network is used as the testbed to emulate the behaviour of an active distribution system with massive penetration of renewable energy resources. The laboratory testbed involves hardware devices, real-time control, and communication infrastructure. Several key performance indices are adopted to assess the effects of the different control actions on the system’s operation. The experimental results demonstrate that the combination of control actions enables the optimal integration of a massive penetration of renewable energy.

Design and Performance of a PV-STATCOM for Enhancement of Power Quality in Micro Grid Applications

2017 ◽  
Vol 8 (3) ◽  
pp. 1408 ◽  
Author(s):  
Lakshman Naik P ◽  
K Palanisamy
Keyword(s):  
Power Quality ◽  
Distribution System ◽  
Reactive Power ◽  
Electrical Power ◽  
Test System ◽  
Green Energy ◽  
Integrated System ◽  
Voltage Source ◽  
Voltage Source Converter ◽  
Power Demand

<p>The Green Energy sources (solar, wind) are performing a vigorous role to reach the electrical power demand. Due to the presence of non-linear loads, reactive loads in the distribution system and the injection of wind power into the grid integrated system results power quality issues like current harmonics, voltage fluctuations, reactive power demand etc. This paper mainly investigates the designing and satisfactory performance evaluation of solar farm as PV-STATCOM (Static Synchronous Compensator) for enhancement of power quality in grid tie system by using MATLAB environment (Simulink). The proportional and integral (PI) Controller and Hysteresis Current Controller (HCC) were effectively utilized to inject the desired current from voltage source converter (VSC) based PV-STATCOM at PCC for the mitigation of quality related problems in the proposed test system.</p>

scholarly journals A Probe into Reactive Power Management in Renewable Energy System using Facts Devices

2019 ◽  
Vol 8 (12) ◽  
pp. 619-626 ◽  
Keyword(s):  
Renewable Energy ◽  
Power Management ◽  
Power Quality ◽  
Reactive Power ◽  
Energy Resources ◽  
Energy Utilization ◽  
Generation Model ◽  
Power Electronic ◽  
Renewable Energy Resources ◽  
Compensating Devices

In the modern era, most of the utility grid is connected with Renewable Energy resources (RERs). In addition to this, many power electronic converters and reactive power compensating devices are also incorporated into the existing grid. This makes the system complicated. Penetration of renewable energy resources affect many power system parameters like grid stability, quality of power, reactive power balance and Sufficient energy utilization. However, the Distributed Generation (DG) towards the power electronic interface creates some critical power quality events such as reactive power management, harmonics and voltage profile which makes the distributed system become a polluted one. This paper depicts the review of modelling and incorporation of various reactive power compensating devices like TCSC, SVC and STATCOM into RES. Power generation model of solar, wind and fuel farm is discussed in this paper. Reactive power compensating devices and its location and sizing are important for the stable and secure operation of the electric grid. Consequently, power quality issues, real-time interconnection issues and policies related to reactive power management are in this paper.

scholarly journals Embedded Generation (EG) optimization planning and EG caused disturbances.

2021 ◽  
Author(s):  
Tonye Irims
Keyword(s):  
Power Quality ◽  
Distribution System ◽  
Reactive Power ◽  
Gradient Methods ◽  
Voltage Profile ◽  
Network Growth ◽  
Power Generators ◽  
Small Areas ◽  
Embedded Generation ◽  
The Difference

The objective of this study is twofold. First, it reviews and discusses the optimization of EmbeddedGeneration rapid cycles of industrialization and population growth have contributed to a rise inenergy use. Small areas and poor development in network growth have also contributed to highload densities in areas. This can contribute to problems of power quality and reliability of voltage.In future electrical systems, thus, embedded output is expected to play a growing role.The incorporation of embedded output in a distribution system would increase network efficiencyin terms of increased voltage profile, decrease in line losses and enhanced power quality if properlydesigned. This will reduce the pressure from the grid so that the feeders linking the network to thegrid could be improved. The optimum delivery means that current assets are better used and thecost-effectiveness of the EG penetration is improved. Capacity generation through the busesshould be delegated so that no technological limits are violated and capacity maximized.The Objective Function (OF) is to be maximized according to the constraints. The constraints areThermal Restriction, Transformer Capacity: (The amount of generation attached minus thesummer valley load does not surpass the rating of the transformer at the higher voltage. Therelation between induction generator and high impedance circuitry can also lead to voltageinstability issues if SCR is not held under reasonable constraints (the amount of generator attachedminus the summer valley load does not surpass that of the transformer at the high voltage). In orderto address system planning, operation and pricing, we are evaluating and addressing severaltraditional optimization approaches, including gradient methods, linear programming, quadraticand dynamic programming.The second objective of this study was to discuss the main disturbances caused by EG. We findand discuss that there exist some disturbances. First, the transients. This is due to the significantcurrent shifts when the turbines are attached or disconnected. The second disturbance we areconcerned about is the difference in voltage. This is due to the cyclical change in the output powerof the engine. The third disturbance we have discussed is the interference in the waveform that iscaused primarily by the transmitters linking the generators to the distribution network. Again, the long-duration difference in voltage induced by changes in active and reactive power generators isanother disruption. In addition, as another disturbance, generators may affect backgroundwaveform disruptions in another manner, directly connected with the distribution system.

scholarly journals Power Quality Analysis of Distribution System Integrated with Multiple PVs

2020 ◽  
Vol 9 (4) ◽  
pp. 166-170
Keyword(s):  
Power Quality ◽  
Distribution System ◽  
Reactive Power ◽  
Harmonic Distortion ◽  
Test System ◽  
Quality Parameters ◽  
Quality Analysis ◽  
Major Power ◽  
Voltage Deviation ◽  
The Impact

In this work, the Impact of integration of multiple Photo Voltaic distributed generators (PV-DGs) on power quality of the distribution system is analyzed under static and dynamic loads. Major power quality parameters considered for the analysis are voltage deviation (VD), Total Real power and reactive power line losses (PT L & QT L) and Total Harmonic Distortion of Voltage at Buses (THDv ). Test system considered for the study is the IEEE-9 bus test system and types of loads considered are Static RL and Induction motors. Modeling and simulation of test system, PVs and Induction motor loads are carriedoutinMATLAB/SIMULINK software package

scholarly journals Harmonic enhancement in microgrid with applications on sensitive loads

2019 ◽  
Vol 9 (2) ◽  
pp. 826
Author(s):  
Montaser Hafez ◽  
Hussein El-Eissawi ◽  
Nabil Ayad
Keyword(s):  
Renewable Energy ◽  
Power Quality ◽  
Distribution System ◽  
Renewable Energy Sources ◽  
Harmonic Distortion ◽  
Nuclear Research ◽  
Quality Standard ◽  
Voltage Variation ◽  
Power Quality Disturbance ◽  
Technical Issues

Power quality issues are an important and growing problem in microgrid. There are two reasons; the more active consumer is participating in the power sector, the use of renewable energy which having a great impact on voltage variation. This paper discusses power quality disturbance and especially harmonic distortion issues in microgrid, and suggests a solution to maintain the operation of the distribution system within power quality standard. To protect sensitive loads from harmonics produced by the grid and by renewable energy sources, passive harmonic filter has been proposed in this paper. The electrical system of a nuclear research reactor as sensitive loads is designed by using Electrical Transient Analyzer Program (ETAP) software. The results show these technical issues are presented with their influence on electrical voltage and harmonic specter.

scholarly journals Experimental Assessment of a Centralised Controller for High-RES Active Distribution Networks

2018 ◽  
Author(s):  
Francisco de Paula García-López ◽  
Manuel Barragán-Villarejo ◽  
Alejandro Marano-Marcolini ◽  
José María Maza-Ortega ◽  
José Luis Martínez-Ramos
Keyword(s):  
Renewable Energy ◽  
Distribution System ◽  
Reactive Power ◽  
Renewable Energy Sources ◽  
Distribution Networks ◽  
Energy Sources ◽  
Renewable Energy Resources ◽  
Real Time Control ◽  
Control Actions ◽  
Active Distribution Networks

This paper assesses the behaviour of active distribution networks with high penetration of renewable energy sources when the control is performed in a centralised manner. The control assets are the on-load tap changers of transformers at the primary substation, the reactive power injections of the renewable energy sources and the active and reactive power exchanged between adjacent feeders when they are interconnected through a DC link. A scaled-down distribution network is used as testbed to emulate the behaviour of an active distribution system with massive penetration of renewable energy resources. The laboratory testbed involves hardware devices, real-time control, and communication infrastructure. Several key performance indices are adopted to assess the effects of the different control actions on the system operation. The experimental results demonstrate that the combination of control actions enables the optimal integration of a massive penetration of renewable energy.

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.

An Optimal Solution for Eco-reliability Stochastic Modeling of Simultaneous Reconfiguration of Distribution Networks and Allocation of Renewable Energy Resources, Capacitors and D-facts

2020 ◽  
Vol 13 (4) ◽  
pp. 486-495
Author(s):  
Masoumeh Karimi ◽  
Mohammad R.J. Oskuee ◽  
Sajad N. Ravdanegh
Keyword(s):  
Renewable Energy ◽  
Stochastic Modeling ◽  
Distribution System ◽  
Reactive Power ◽  
Renewable Energy Sources ◽  
Market Price ◽  
Distribution Networks ◽  
Energy Resources ◽  
Renewable Energy Resources ◽  
Krill Herd

Objective: A new method based on stochastic modeling of simultaneous optimal reconfiguration of distribution networks and allocation of multiple Distribution STATic COMpensator and renewable energy resources as new developed technologies is suggested in this paper. Background: This problem involves vital uncertain parameters such as: intermittent nature of renewable energy sources, load forecasting and market price errors. Krill Herd Algorithm as a powerful optimization solution is applied to solve suggested problem. Methods: Several effective cost based consequences can be achieved by proposed technique like: DG units installation and operation costs, D-Statcom installation cost, capacitor costs, cost of purchased energy from the transmission network, active and reactive power losses cost, line upgrade cost and distribution system reconfiguration cost. Results: In addition, energy not supplied as a vital reliability index incorporated in the cost function aims to improve network’s reliability efficiently. Conclusion: IEEE 33 bus radial distribution system is used here to check the practicability of the proposed scheme.

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