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All Journal International Journal of Electrical and Computer Engineering
Hernan Hernandez Herrera
Universidad Simón Bolívar
Computer Science & IT Electrical & Electronics Engineering

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Voltage collapse point evaluation considering the load dependence in a power system stability problem Zaid Garcia Sanchez; Jose Antonio González; Gustavo Crespo; Hernan Hernandez Herrera; Jorge Iván Silva
International Journal of Electrical and Computer Engineering (IJECE) Vol 10, No 1: February 2020
Publisher : Institute of Advanced Engineering and Science

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (621.696 KB) | DOI: 10.11591/ijece.v10i1.pp61-71

Abstract

Voltage Stability has emerged in recent decades as one of the most common phenomena, occurrence in Electrical Power Systems. Prior researches focused on the development of algorithm indices to solve the stability problem and in the determination of factors with most influence in voltage collapse to solve the stability problem. This paper evaluates the influence that the load dependence has with the voltage on the phenomenon of the voltage stability and especially on the characteristics the collapse point or instability point. Load modeling used is detailed and comparisons of the results obtained are made with those described in the bibliography and those obtained with commercial software. The results of the load margin are also compared when a constant load or a voltage-dependent load is considered as well as the values obtained at the maximum load point and the point of voltage instability.
Frequency response analysis under faults in weak power systems Marino Godoy Arcia; Zaid Garcia Sanchez; Hernan Hernandez Herrera; José Antonio Gonzalez Cueto Cruz; Jorge Iván Silva Ortega; Gustavo Crespo Sánchez
International Journal of Electrical and Computer Engineering (IJECE) Vol 12, No 2: April 2022
Publisher : Institute of Advanced Engineering and Science

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.11591/ijece.v12i2.pp1077-1088

Abstract

The renewable energy sources (RESs) projects are solutions with environmental benefits that are changing the traditional power system operation and concept. Transient stability analysis has opened new research trends to guarantee a secure operation high penetration. Problems such as frequency fluctuations, decoupling between generator angular speed, network frequency fluctuation and kinetic energy storing absence are the main non-conventional RESs penetration in power systems. This paper analyzes short-circuit influence on frequency response, focusing on weak distribution networks and isolated, to demonstrate relevance in frequency stability. A study case considered a generation outage and a load input to analyze frequency response. The paper compares frequency response during a generation outage with a short-circuit occurrence. In addition, modular value and angle generator terminal voltage affectation by electric arc and network ratio R⁄X, failure type influence in power delivered behavior, considering fault location, arc resistance and load. The arc resistance is defined as an added resistance that appears during failure and influences voltage modulus and angle value results showing that intermittent non-conventional RES participation can lead to frequency fluctuations. Results showed that arc resistance, type of failure, location and loadability determine the influence of frequency response factors in weak power systems.
Co-Authors Gustavo Crespo Gustavo Crespo Sánchez Jorge Iván Silva Jorge Iván Silva Ortega Jose Antonio González José Antonio Gonzalez Cueto Cruz Marino Godoy Arcia Zaid García Sánchez Zaid Garcia Sanchez