scholarly journals Power Quality Issues in Power Systems

2019 ◽  
Vol 9 (2S3) ◽  
pp. 308-313
Keyword(s):  
Power Systems ◽  
Power System ◽  
Power Quality ◽  
Power Lines ◽  
Precautionary Measure ◽  
Different Types ◽  
Quality Issues

Power quality in power system is one of the most important researches in the recent age, many researchers working in this area keeping objective to achieve quality power. This paper presents power quality issues in power systems, especially in INDIA. It also includes the various causes of power quality problems, their impact and precautionary measure to solve the power quality issues. Various mitigating devices used to solve various power quality problems and some methods suggested improving the power quality. Different types of controller and their specific applications also presented. A Hybrid APF designee is also suggested to mitigate the harmonics in power lines. Finally, the paper is designed to give an overview of power quality phenomenon in power system and can be utilized by the researchers those working in the area of power quality.

scholarly journals Integrating Photovoltaic Systems in Power System: Power Quality Impacts and Optimal Planning Challenges

2014 ◽  
Vol 2014 ◽  
pp. 1-7 ◽  
Author(s):  
Aida Fazliana Abdul Kadir ◽  
Tamer Khatib ◽  
Wilfried Elmenreich
Keyword(s):  
Power Systems ◽  
Power System ◽  
Power Quality ◽  
Distribution System ◽  
Power Flow ◽  
Harmonic Distortion ◽  
Integrated System ◽  
Optimal Planning ◽  
High Penetration ◽  
Bidirectional Power Flow

This paper is an overview of some of the main issues in photovoltaic based distributed generation (PVDG). A discussion of the harmonic distortion produced by PVDG units is presented. The maximum permissible penetration level of PVDG in distribution system is also considered. The general procedures of optimal planning for PVDG placement and sizing are also explained in this paper. The result of this review shows that there are different challenges for integrating PVDG in the power systems. One of these challenges is integrated system reliability whereas the amount of power produced by renewable energy source is consistent. Thus, the high penetration of PVDG into grid can decrease the reliability of the power system network. On the other hand, power quality is considered one of the challenges of PVDG whereas the high penetration of PVDGs can lead to more harmonic propagation into the power system network. In addition to that, voltage fluctuation of the integrated PVDG and reverse power flow are two important challenges to this technology. Finally, protection of power system with integrated PVDG is one of the most critical challenges to this technology as the current protection schemes are designed for unidirectional not bidirectional power flow pattern.

scholarly journals Power Systems Resilience Metrics: A Comprehensive Review of Challenges and Outlook

2020 ◽  
Vol 12 (22) ◽  
pp. 9698
Author(s):  
Habibollah Raoufi ◽  
Vahid Vahidinasab ◽  
Kamyar Mehran
Keyword(s):  
Power Systems ◽  
Power System ◽  
Electric Power ◽  
Low Frequency ◽  
Cost Benefit ◽  
Electric Power System ◽  
Different Types ◽  
Key Variables ◽  
Comprehensive Framework ◽  
Planning And Operation

Recently, there has been a focus on natural and man-made disasters with a high-impact low-frequency (HILF) property in electric power systems. A power system must be built with “resilience” or the ability to withstand, adapt and recover from disasters. The resilience metrics (RMs) are tools to measure the resilience level of a power system, normally employed for resilience cost–benefit in planning and operation. While numerous RMs have been presented in the power system literature; there is still a lack of comprehensive framework regarding the different types of the RMs in the electric power system, and existing frameworks have essential shortcomings. In this paper, after an extensive overview of the literature, a conceptual framework is suggested to identify the key variables, factors and ideas of RMs in power systems and define their relationships. The proposed framework is compared with the existing ones, and existing power system RMs are also allocated to the framework’s groups to validate the inclusivity and usefulness of the proposed framework, as a tool for academic and industrial researchers to choose the most appropriate RM in different power system problems and pinpoint the potential need for the future metrics.

scholarly journals Design and implementation of DPFC for multi-bus power system

2018 ◽  
Vol 7 (2.8) ◽  
pp. 18
Author(s):  
B Vijaya Krishna ◽  
B Venkata Prashanth ◽  
P Sujatha
Keyword(s):  
Power Systems ◽  
Power System ◽  
Power Quality ◽  
Power Flow ◽  
Pulse Width Modulation ◽  
Voltage Source ◽  
Voltage Sag ◽  
Voltage Source Inverters ◽  
Interconnected Power System ◽  
Simulink Model

In current days, the power quality issues in the interconnected power system are mainly happens due to the demand of electricity and utilization of large non-linear loads as well as inductive/capacitive loads. The power quality cries are voltage sag and swell in multi-bus power system (MBPS). In this article studies on a two bus, three bus and five bus power systems using DPFC. In order to eliminate the voltage sag and swell in the MBPS, a distributed power flow controller (DPFC) is designed. The structure of the DPFC consists of three-phase shunt converter and three single series phase converters. Both these converters are arranged in back-back voltage source inverters (VSIs). These converters are controlled with help of the pulse width modulation (PWM) scheme. The feedback controllers and reference signals are derived the PWM for DPFC to magnify the power quality problems in MBPS. The performance of the model is investigated at different loads by making of MATLAB/Simulink model. The simulation results are presented.

A New Method of Harmonic Detection Based on Auxiliary Tools

2012 ◽  
Vol 433-440 ◽  
pp. 6462-6466
Author(s):  
Song Wang ◽  
Ming Guang Liu ◽  
De He Li ◽  
Hong Rui Wang
Keyword(s):  
Experimental Data ◽  
Power Systems ◽  
Power System ◽  
Power Quality ◽  
Theoretical Foundation ◽  
Good Alternative ◽  
Harmonic Detection ◽  
Harmonic Currents ◽  
Universal Applicability ◽  
Harmonic Measurement

In power systems there are many non-linear loads, the resulting harmonics on the power quality can cause great impact to the power system. Thus it is important to monitor and analyze harmonics generated by these equipments in order to get a better power quality. In this paper, we firstly analysis the theoretical foundation of the harmonic measurement. Secondly, by use of the experimental data received from oscilloscope, we calculate and analyze the harmonic currents by using the tool of FFT in MATLAB. The method is of universal applicability, particularly compared with the expensive power analyzing equipments, which may be a good alternative.

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