scholarly journals Procedure to Evaluate the Impact in Distribution Single Phase Transformers, Due to Massive Insertion of New Nonlinear Load, Which Changes Daily Demand Graphs

2019 ◽  
Author(s):  
Jorge Enrique Carrión González ◽  
Antonio Martínez García ◽  
Alfredo del Castillo Serpa ◽  
Marianela Carrión González ◽  
Rodolfo Pabel Merino ◽  
...  
Keyword(s):  
Power Systems ◽  
Single Phase ◽  
Phase Distribution ◽  
Nonlinear Load ◽  
Current Harmonics ◽  
Distribution Transformers ◽  
New Type ◽  
Nonlinear Devices ◽  
The Impact ◽  
Transmission And Distribution

Power Electronic development determines introduction of nonlinear devices in Electric Power Systems. Introduction of nonlinear devices increase current harmonics in Transmission and Distribution Power Systems. Distribution transformers and feeders increase power losses and their nominal parameters are reduced. Present work introduces a procedure to evaluate maximum permissible load in single phase distribution transformers with massive introduction of a new type of nonlinear load which changes daily demand graphs.

scholarly journals Procedure to Evaluate the Impact in Distribution Single Phase Transformers Due to Insertion of New Nonlinear Load Which Changes Daily Demand Graphs

Energies ◽  
2019 ◽  
Vol 12 (20) ◽  
pp. 3923
Author(s):  
Jorge Enrique Carrión González ◽  
Antonio Martínez García ◽  
Alfredo del Castillo Serpa ◽  
Marianela del Cisne Carrión González ◽  
Rodolfo Pabel Merino Vivanco ◽  
...  
Keyword(s):  
Power Systems ◽  
Single Phase ◽  
Phase Distribution ◽  
Nonlinear Load ◽  
Current Harmonics ◽  
Distribution Transformers ◽  
New Type ◽  
Nonlinear Devices ◽  
The Impact ◽  
Transmission And Distribution

Power electronic development determines the introduction of nonlinear devices in electric power systems. Introduction of nonlinear devices increase current harmonics in transmission and distribution power systems. Distribution transformers and feeders increase power losses and their nominal parameters are reduced. The present work introduces a procedure to evaluate maximum permissible load in single phase distribution transformers with the introduction of a new type of nonlinear load which changes daily demand graphs.

scholarly journals Harmonic Reduction in Single Boost Converter Fed DC Motor with EMI Input Filter

2018 ◽  
Vol 9 (2) ◽  
pp. 914
Author(s):  
A. Sivakumar ◽  
T. Muthamizhan
Keyword(s):  
Power Systems ◽  
Dc Motor ◽  
Boost Converter ◽  
Motor Drive ◽  
Nonlinear Load ◽  
Current Harmonics ◽  
Harmonic Reduction ◽  
Input Filter ◽  
Power Electronics Converter ◽  
Motor Drive System

DC motor drive system supplied by AC/DC rectifier topology considered as a nonlinear load. It produces harmonic distortions and EMI noise effects in the power systems. In this paper deals with the reduction of supply current harmonics and EMI noise generated by the power electronics converter in the DC motor drive using FFT analysis. The single boost converter along with EMI input filter is proposed in this system to investigate the harmonic reduction in the DC motor drive. The single boost converter fed DC motor drive is modeled and simulated using MATLAB/Simulink software. The simulation results show better agreement with the proposed system.

scholarly journals Multivariable polynomial fitting of controlled single-phase nonlinear load of input current total harmonic distortion

Open Physics ◽  
2018 ◽  
Vol 16 (1) ◽  
pp. 137-142
Author(s):  
Roman Sikora ◽  
Przemysław Markiewicz ◽  
Wiesława Pabjańczyk
Keyword(s):  
Mathematical Model ◽  
Power Systems ◽  
Single Phase ◽  
Supply Voltage ◽  
Harmonic Distortion ◽  
Total Harmonic Distortion ◽  
Polynomial Fitting ◽  
Nonlinear Load ◽  
Multivariable Polynomial ◽  
Led Luminaire

Abstract The power systems usually include a number of nonlinear receivers. Nonlinear receivers are the source of disturbances generated to the power system in the form of higher harmonics. The level of these disturbances describes the total harmonic distortion coefficient THD. Its value depends on many factors. One of them are the deformation and change in RMS value of supply voltage. A modern LED luminaire is a nonlinear receiver as well. The paper presents the results of the analysis of the influence of change in RMS value of supply voltage and the level of dimming of the tested luminaire on the value of the current THD. The analysis was made using a mathematical model based on multivariable polynomial fitting.

scholarly journals Modelling and Vulnerability Analysis of Cyber-Physical Power Systems Based on Interdependent Networks

Energies ◽  
2019 ◽  
Vol 12 (18) ◽  
pp. 3439 ◽  
Author(s):  
Haiyan Zhang ◽  
Minfang Peng ◽  
Josep M. Guerrero ◽  
Xingle Gao ◽  
Yanchen Liu
Keyword(s):  
Power Systems ◽  
Communication System ◽  
Communication Systems ◽  
Power Grid ◽  
Malicious Attack ◽  
The Face ◽  
Failure Propagation ◽  
New Type ◽  
High Degree ◽  
The Impact

The strong coupling between the power grid and communication systems may contribute to failure propagation, which may easily lead to cascading failures or blackouts. In this paper, in order to quantitatively analyse the impact of interdependency on power system vulnerability, we put forward a “degree–electrical degree” independent model of cyber-physical power systems (CPPS), a new type of assortative link, through identifying the important nodes in a power grid based on the proposed index–electrical degree, and coupling them with the nodes in a communication system with a high degree, based on one-to-one correspondence. Using the double-star communication system and the IEEE 118-bus power grid to form an artificial interdependent network, we evaluated and compare the holistic vulnerability of CPPS under random attack and malicious attack, separately based on three kinds of interdependent models: “degree–betweenness”, “degree–electrical degree” and “random link”. The simulation results demonstrated that different link patterns, coupling degrees and attack types all can influence the vulnerability of CPPS. The CPPS with a “degree–electrical degree” interdependent model proposed in this paper presented a higher robustness in the face of random attack, and moreover performed better than the degree–betweenness interdependent model in the face of malicious attack.

Estimation of Design Parameters of Single-Phase Distribution Transformers From Terminal Measurements

2017 ◽  
Vol 32 (4) ◽  
pp. 2031-2039 ◽  
Author(s):  
Reza Kazemi ◽  
Saeed Jazebi ◽  
Digvijay Deswal ◽  
Francisco de Leon
Keyword(s):  
Single Phase ◽  
Phase Distribution ◽  
Design Parameters ◽  
Distribution Transformers

Research and Application of SVC Technology in Grid

2014 ◽  
Vol 543-547 ◽  
pp. 878-883
Author(s):  
Jun Dong ◽  
Jian Guo Xu ◽  
Hao Zhang ◽  
Yu Jie Pei ◽  
Xian Feng Li
Keyword(s):  
Power Systems ◽  
Power Quality ◽  
Distribution System ◽  
Power Flow ◽  
Reactive Power ◽  
Control Strategies ◽  
Load Capacity ◽  
Flow Distribution ◽  
Nonlinear Load ◽  
The Impact

The cause serious deterioration in power quality problems for the growing impact and nonlinear load capacity, introduced SVC device in the role of modern power systems and applications. According to the lack of adequate regional dynamic reactive power regulation means to cause voltage fluctuations, harmonics exceeded the actual situation, through analysis and simulation of the existing 66kV grid power quality conditions, refers to the necessity of application of SVC, the compensation capacity for SVC, filter capacitor system parameters and control strategies were designed, the results show improved 220kV SVC reactive power flow distribution system, reducing the system once or twice a net loss, reducing the impact and harmonic interference voltage caused by nonlinear loads, system security, economic operation of great significance.

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