Technical and economic evaluation of power quality performance using FACTS devices considering renewable generations

2019 ◽  
Vol 29 ◽  
pp. 49-62 ◽  
Author(s):  
Mohammad Ghiasi
Keyword(s):  
Economic Evaluation ◽  
Power Quality ◽  
Quality Performance ◽  
Facts Devices

scholarly journals Particle swarm optimization algorithm-based PI inverter controller for a grid-connected PV system

PLoS ONE ◽  
2020 ◽  
Vol 15 (12) ◽  
pp. e0243581
Author(s):  
M. F. Roslan ◽  
Ali Q. Al-Shetwi ◽  
M. A. Hannan ◽  
P. J. Ker ◽  
A. W. M. Zuhdi
Keyword(s):  
Power System ◽  
Power Quality ◽  
Transient Response ◽  
Particle Swarm ◽  
Pi Controller ◽  
Pv System ◽  
Quality Performance ◽  
Three Phase ◽  
Input Parameters ◽  
Utility Grid

The lack of control in voltage overshoot, transient response, and steady state error are major issues that are frequently encountered in a grid-connected photovoltaic (PV) system, resulting in poor power quality performance and damages to the overall power system. This paper presents the performance of a control strategy for an inverter in a three-phase grid-connected PV system. The system consists of a PV panel, a boost converter, a DC link, an inverter, and a resistor-inductor (RL) filter and is connected to the utility grid through a voltage source inverter. The main objective of the proposed strategy is to improve the power quality performance of the three-phase grid-connected inverter system by optimising the proportional-integral (PI) controller. Such a strategy aims to reduce the DC link input voltage fluctuation, decrease the harmonics, and stabilise the output current, voltage, frequency, and power flow. The particle swarm optimisation (PSO) technique was implemented to tune the PI controller parameters by minimising the error of the voltage regulator and current controller schemes in the inverter system. The system model and control strategies were implemented using MATLAB/Simulink environment (Version 2020A) Simscape-Power system toolbox. Results show that the proposed strategy outperformed other reported research works with total harmonic distortion (THD) at a grid voltage and current of 0.29% and 2.72%, respectively, and a transient response time of 0.1853s. Compared to conventional systems, the PI controller with PSO-based optimization provides less voltage overshoot by 11.1% while reducing the time to reach equilibrium state by 32.6%. The consideration of additional input parameters and the optimization of input parameters were identified to be the two main factors that contribute to the significant improvements in power quality control. Therefore, the proposed strategy effectively enhances the power quality of the utility grid, and such an enhancement contributes to the efficient and smooth integration of the PV system.

scholarly journals Fuzzy Logic Based Interline Unified Power Quality Conditioner for Voltage Regulation of Critical Load Bus

2018 ◽  
Vol 7 (1.8) ◽  
pp. 193
Author(s):  
N Nithya Sree ◽  
P Srinivasa Varma
Keyword(s):  
Fuzzy Logic ◽  
Power Quality ◽  
Voltage Regulation ◽  
Computing Technique ◽  
Facts Devices ◽  
Unified Power Quality Conditioner ◽  
Significant Difference ◽  
Soft Computing Technique ◽  
Power Quality Conditioner ◽  
Static Compensator

Interline unified power quality conditioner is the recent advancement in the world of FACTS devices and technology. The new equipment is only a mere extension of the existing FACTS device features  like Distributed Static Compensator which does not limit to better voltage regulation at the gird side as well as load side bus. The effectiveness of the new FACTS device is compared with its homologous counterpart, namely conventional Unified power quality conditioner. It is observed that there is significant difference with respect to the arrangement of parallel and series connected converters. Soft computing technique namely fuzzy logic based controller for the proposed Interline unified power quality conditioner is presented in the paper. The implementation and usefulness of the proposed control topology is tested and simulated in MATLAB/SIMULINK environment. 

scholarly journals Power Quality Services Provided by Virtually Synchronous FACTS

Energies ◽  
2019 ◽  
Vol 12 (17) ◽  
pp. 3292 ◽  
Author(s):  
Andres Tarraso ◽  
Ngoc-Bao Lai ◽  
Gregory N. Baltas ◽  
Pedro Rodriguez
Keyword(s):  
Power Systems ◽  
Power Quality ◽  
Electrical Networks ◽  
Efficient Operation ◽  
Flexible Ac Transmission ◽  
Facts Devices ◽  
Voltage Quality ◽  
Critical Issues ◽  
Harmonics Flow ◽  
Ac Transmission

The variable and unpredictable behavior of renewable energies impacts the performance of power systems negatively, threatening their stability and hindering their efficient operation. Flexible ac transmission systems (FACTS) devices are able to emulate the connection of parallel and series impedances in the transmission system, which improves the regulation of power systems with a high share of renewables, avoiding congestions, enhancing their response in front of contingencies and, in summary, increasing their utilization and reliability. Proper control of voltage and current under distorted and unbalanced transient grid conditions is one of the most critical issues in the control of FACTS devices to emulate such apparent impedances. This paper describes how the synchronous power controller (SPC) can be used to implement virtually synchronous FACTS. It presents the SPC functionalities, emphasizing in particular the importance of virtual admittance emulation by FACTS devices in order to control transient unbalanced currents during faults and attenuate harmonics. Finally, the results demonstrate the effectiveness of SPC-based FACTS devices in improving power quality of electrical networks. This is a result of their contribution to voltage balancing at point of connection during asymmetrical faults and the improvement of grid voltage quality by controlling harmonics flow.

A study of UPQC: emerging mitigation techniques for the impact of recent power quality issues

Circuit World ◽  
2020 ◽  
Vol 47 (1) ◽  
pp. 11-21
Author(s):  
Ananthan Nagarajan ◽  
Sivachandran P. ◽  
Suganyadevi M.V. ◽  
Muthukumar P.
Keyword(s):  
Power Quality ◽  
Content Type ◽  
Facts Devices ◽  
Recent Developments ◽  
Quality Issues ◽  
Power Quality Conditioner ◽  
Compensating Devices ◽  
Quality Of Electric Power ◽  
The Impact

Purpose The purpose of this study is to help the researchers, public, industries and government to realize the tremendous trends to improve the power quality of both sources and load side. Design/methodology/approach The work carried out in the Facts device and power quality issues. Findings Maintaining the quality of electric power is always a challenging task. The effect of power electronics devices leads to improper power quality. The use of FACTS devices is preferably the best approach to treat power-quality-related problems. Usually, all FACTS devices are constructed to operate on the side of either the source side or the load. Originality/value This paper explores a broad comprehensive study of various types of power quality problems and classification of FACTS devices with its recent developments. Furthermore unified power quality conditioner (UPQC) is particularly reviewed to highlight the advantages over other compensating devices. An exhaustive study of literature has been carried out and most significant concepts are presented

Sign in / Sign up

Export Citation Format

Share Document