Power Quality Analysis and Research of Fushun Area Grid

2014 ◽  
Vol 543-547 ◽  
pp. 709-712
Author(s):  
Yan Jun Pang ◽  
Cheng Zhao Gu ◽  
Qing Hao Wang ◽  
Yu Jie Pei ◽  
Hui Yan Cao ◽  
...  
Keyword(s):  
Power Quality ◽  
Electric Energy ◽  
Development Trend ◽  
Quality Analysis ◽  
Practical Significance ◽  
Nonlinear Loads ◽  
Power Quality Analysis ◽  
And Control ◽  
The Development Trend

With the development of national economy, the progress of science and technology and the height of the production process automation, various nonlinear loads in power grid grow rapidly together with a variety of complex, precise and sensitive power equipment. The above-mentioned two aspects of contradiction is more and more prominent and the requirement of users for power quality is also higher. In such situation, this paper discusses the related theory and its control technology in the field of power quality, analysis the development trend of power quality management and control in our country, which has a strong practical significance. This paper expounds the main problems affecting the quality of electric energy, and analyze in detail the way to improve the quality of electric energy, and then give a preliminary discussion on the development direction of this field.

scholarly journals Analysis of voltage and current magnification in resonant circuits on hyperspectral signal processing

2020 ◽  
Vol 53 (3-4) ◽  
pp. 635-648 ◽  
Author(s):  
Arumuga Maria Devi Thanu ◽  
Muthukumar Devadoss ◽  
Kumar Parasuraman
Keyword(s):  
Signal Processing ◽  
Power Quality ◽  
Poor Quality ◽  
Control Measures ◽  
Quality Analysis ◽  
Nonlinear Loads ◽  
Magnetic Attraction ◽  
Short Period ◽  
Rlc Circuits

In the recent years, electrical, electronics, and telecommunications have far-famed a rare improvement, the quantity of nonlinear loads has inflated. Many electric power consumption devices are sensitive to magnetic attraction disturbances, created through nearby devices, which might have an effect on the power quality for several industry units or may be domestic users. Poor quality of power leads to fault of devices and instrumentation instability in a short period. Systematically, some research and analysis are required to monitor the disturbances of power quality which increases quality of power. This paper consists of power quality analysis on RLC circuits with voltage and current magnification values through Hyperspectral signal processing. The voltage changes and harmonic disturbances can be simulated finely with the MATLAB–Simulink simulation results and the theoretical analysis display. The simulated outcome and the Hyperspectral processing offer data and identification of power quality variances and additional control measures accurately.

scholarly journals Power quality analysis of the grid-connected PV system using microinverter

2020 ◽  
Vol 1 ◽  
pp. 1-6
Author(s):  
Ngo Xuan Cuong ◽  
Do Nhu Y
Keyword(s):  
Power Quality ◽  
Research Method ◽  
Quality Analysis ◽  
Small Scale ◽  
Laboratory Measurements ◽  
Electrical System ◽  
Pv System ◽  
Power Quality Analysis ◽  
Scale Grid

At present, small-scale grid-connected PV system is increasingly developed and used in many households. These small-scale PV system are often connected to grid using microinverter, because its advantages are low maintenance investment costs, ease of installation and operation and do not cause environmental pollution. The content of the article focuses on power quality analysis of the non-stored grid-connected PV system using microinverter. The research method in the paper is based on experiments on models and laboratory measurements. The analytical results will assess the power quality of grid-connected PV system using microinverter, thereby managers and operators to take measures to improve the power quality of the electrical system with grid-connected PV system.

scholarly journals Impact of Harmonic Currents of Nonlinear Loads on Power Quality of a Low Voltage Network–Review and Case Study

Energies ◽  
2021 ◽  
Vol 14 (12) ◽  
pp. 3665
Author(s):  
Łukasz Michalec ◽  
Michał Jasiński ◽  
Tomasz Sikorski ◽  
Zbigniew Leonowicz ◽  
Łukasz Jasiński ◽  
...  
Keyword(s):  
Power Quality ◽  
Low Voltage ◽  
Harmonic Distortion ◽  
Experimental Tests ◽  
Total Harmonic Distortion ◽  
Quality Analysis ◽  
Nonlinear Loads ◽  
Distortion Factor ◽  
Harmonic Currents

The paper presents a power-quality analysis in the utility low-voltage network focusing on harmonic currents’ pollution. Usually, to forecast the modern electrical and electronic devices’ contribution to increasing the current total harmonic distortion factor (THDI) and exceeding the regulation limit, analyses based on tests and models of individual devices are conducted. In this article, a composite approach was applied. The performance of harmonic currents produced by sets of devices commonly used in commercial and residential facilities’ nonlinear loads was investigated. The measurements were conducted with the class A PQ analyzer (FLUKE 435) and dedicated to the specialized PC software. The experimental tests show that the harmonic currents produced by multiple types of nonlinear loads tend to reduce the current total harmonic distortion factor (THDI). The changes of harmonic content caused by summation and/or cancellation effects in total current drawn from the grid by nonlinear loads should be a key factor in harmonic currents’ pollution study. Proper forecasting of the level of harmonic currents injected into the utility grid helps to maintain the quality of electricity at an appropriate level and reduce active power losses, which have a direct impact on the price of electricity generation.

scholarly journals Power Quality Submetering using Iot

2020 ◽  
Vol 9 (7) ◽  
pp. 717-720
Keyword(s):  
Internet Of Things ◽  
Power Quality ◽  
Integrated Circuit ◽  
Management System ◽  
Electric Energy ◽  
Quality Analysis ◽  
Iot Platform ◽  
Building Management ◽  
Building Management System

Electric energy is an important need now a day. Everyone utilize the energy to an extent in such a way that the usage of various kind of equipments under the Building Management System increases, it is crucial and important to ensure the perfect operation of the equipments. Uninterrupted power supply is very important for every house, and also maintaining the quality of power given to the system and reliability of supply are essential. Also monitoring the operation of equipment can play a major role. Submetering, is a concept of calculating the power consumed by individual ones or the entire system in any building management system. An Internet of Things (IoT) platform, which allows a kind of environment for the accessing the information in a building management system. Also it would be useful for ensuring safe operations. This submetering work deals with an IoT platform for monitoring the quality of power at the input of the system, provides the early detection of faults and analysis which is used to control the system. Moreover, the measured power quality problems can be processed in the IoT system by which the analysis will be done with the comparison of standard values of the system. The Power quality submetering is built around by arduino with internet of things platform, which provides an energy submetering Integrated Circuit (IC). The data obtained from the submeter by internet of things is wirelessly transferred to the user and also measured for power quality analysis, load and energy management.

Variable-Frequency Prony Method in the Analysis of Electrical Power Quality

2012 ◽  
Vol 19 (1) ◽  
pp. 39-48 ◽  
Author(s):  
Jarosław Zygarlicki ◽  
Janusz Mroczka
Keyword(s):  
Least Squares ◽  
Power Quality ◽  
Electrical Power ◽  
Electric Energy ◽  
Variable Frequency ◽  
Prony Method ◽  
Analysis Window ◽  
Proposed Modification ◽  
Selection Of

Variable-Frequency Prony Method in the Analysis of Electrical Power QualityThe article presents a new modification of the the least squares Prony method. The so-called variable-frequency Prony method can be a useful tool for estimating parameters of sinusoidal components, which, in the analyzed signal, are characterized by time-dependent frequencies. The authors propose use of the presented method for testing the quality of electric energy. It allows observation of phenomena which, when using traditional methods, are averaged in the analysis window. The proposed modification of least squares Prony method is based on introduction and specific selection of a frequency matrix. This matrix represents frequencies of estimated components and their variability in time.

Sign in / Sign up

Export Citation Format

Share Document