Review Power Quality Issues (original) (raw)

Trends, challenges and opportunities in power quality research

European Transactions on Electrical Power, 2010

This paper outlines a number of possible research directions in power quality. The introduction of new sources of generation will introduce the need for new research on voltage-magnitude variations, harmonic emission and harmonic resonance. Statistical performance indicators are expected to play an important role in addressing the hosting capacity of the power system for these new sources. The quickly growing amounts of power-quality data call for automatic analysis methods. Advanced signal-processing tools need to be developed and applied to address this challenge. Equipment with an active power-electronic interface generates waveform distortion at higher frequencies than existing equipment. The emission, spread, consequences and mitigation of this distortion require more research emphasis. The growing complexity of the power system calls for remote identification of system events and load transitions. Future DC networks, at different voltage levels, require the research on DC power quality next to AC power quality. Research on methods to describe and analyse time-varying harmonics has applications in a number of the above-mentioned issues. So does the use of hardware-in-the-loop (HIL) and real-time-digital simulation.

A Review On Power Quality Issues And Their Mitigation Techniques

2021

Power Quality is playing an increasingly significant role both at supply and demand sides. With the advent of participation of private player’s in distribution systems, the power quality is expected to be the pivotal decisive factor before the consumers. The types of Power Quality problems that a customer may encounter classified depending on how the voltage waveform is being distorted. There are transients, short duration variations (sags, swells and interruption), long duration variations (sustained interruptions, under voltages, over voltages), voltage imbalance, waveform distortion (dc offset, harmonics, inter harmonics, notching, and noise), voltage fluctuations and power frequency variations. Various techniques applied to mitigate the different Power Quality problems are also presented for consideration Keywords—Power Quality; voltage sag; voltage swell; Micro grid; I.INTRODUCTION Nowadays, reliability and quality of electric power is one of the most discuss topics in power in...

A Review on Power Quality Issues and Corrective Measures

From last decade power quality issues has become more complex at all level of power system. It is a major topic of concern due to the sensitivity of the modern equipment which are nonlinear loads and hence results in imbalance of the power system. Power quality parameters consist of harmonic distortions, dips and swells, interruptions, flickers, transients, frequency deviations etc. The aim of this paper is to review the most common power quality issues, the effect of the same on the power quality and various techniques utilizing in the present system for its improvement.

DETAILED CLASSIFICATION OF VARIOUS CATEGORIES OF POWER QUALITY PROBLEMS

In the recent years, power quality has been a research area of exponential increasing interest due to the wide utilization of power electronic devices. A high level of power quality is required to ensure the proper and continuous operation of the sensitive equipments such as power electronic drives, computers and microprocessor-based controllers. This necessitates the detection and monitoring of power quality problems. This paper presents a simple algorithm to detect and classify various categories of nonstationary power quality problems. The algorithm takes the sampled 3-phase instantaneous voltages which are measured at the point of common coupling and computes RMS and DC values. Based on the calculated values and number of samples, the power quality problem is classified. This algorithm is implemented using MATLAB programming and is tested for various categories of power quality problems such as sag, swell, interruption; under voltage, over voltage, unbalance and DC offset.

Power Quality Problems and Standards-A Review

Power quality has become a major area of concern in present era due to the increase in modern sensitive and sophisticated loads connected to the Distribution System. This paper presents a review of the power quality problems, issues, related international standards.

SOME ASPECTS OF THE ELECTRICAL POWER QUALITY

The paper presents basic definitions, terms and indicators of the quality of electricity. Higher harmonics and their consequences are presented. Degradation of basic voltage parameters (effective value, frequency, phase shift, symmetry, etc.) as well as waveform distortion, ie short-term or long-term deviations from the sinusoidal shape (higher harmonics, short-term interruptions, voltage failures, impulse overvoltages and others) represents a low-frequency part of the conduction disturbances that most affect the voltage quality as part of the electromagnetic compatibility problem. Basic standards and recommendations for controlling higher harmonics in electrical networks are given.

A general review of power quality standards and terminologies

Journal of University of Shanghai for Science and Technology, 2021

In the next few years, more than 80% of AC power is to be processed through power converters owing to their benefits of energy conservation, flexibility, network interconnection, and weight and volume reduction in a number of equipment such as lighting arrestors, HVAC computers, fans, and so on. This paper gives an introduction on power quality (PQ), causes and effects of power quality problems. It also deals with power quality definitions, terminologies, standards, bench- marks, monitoring requirements, financial loss, and analytical quantification. It also discusses various types of nonlinear loads, which cause these power quality problems, they are illustrated, classified, modeled, quantified, and analyzed for associated power quality issues.

A Review of Power Quality Problems, Standards and Solutions

Power quality has become a major area of concern in present era due to the increase in modern sensitive and sophisticated loads connected to the Distribution System. The electrical devices or equipments are prone to failure when exposed to one or more power quality problems. The electrical device might be an electric motor, a transformer, a generator, a computer, a printer, communication equipment, or a household appliance reacts adversely to power quality issues depending on the severity of problems. This paper presents a review of the power quality problems, issues, related international standards and the solution techniques. Some power quality enhancement devices are also listed. It is necessary for engineers, technicians, and system operators to become familiar with power quality issues.