scholarly journals Research on Applicability of the Practical Transient Voltage Stability Criterion Based on Voltage Magnitude and Sag Duration

2021 ◽  
Vol 11 (10) ◽  
pp. 4569
Author(s):  
Guoteng Wang ◽  
Zheng Xu ◽  
Zheren Zhang
Keyword(s):  
Power Systems ◽  
Voltage Stability ◽  
Stability Boundary ◽  
Theoretical Derivation ◽  
System A ◽  
Transient Voltage Stability ◽  
Practical Engineering ◽  
Transient Voltage ◽  
The Stability ◽  
Application Scope

Voltage sags threaten the transient voltage stability of power systems. To evaluate the transient voltage stability, practical criteria based on voltage magnitude and sag duration are widely used in practical engineering. However, the applicability of practical criteria needs to be studied. In this paper, in a single-load system, a theoretical derivation was first made to obtain the transient voltage stability boundary. Then, by studying the relationship between the practical criteria and the stability boundary, the application scope of the practical criteria was determined. The application scope described in this paper can guide operators to use the practical criteria correctly and avoid misjudgment of the transient voltage stability as much as possible. Finally, a case study based on PSCAD/EMTDC is presented, and the simulation results verified the conclusions proposed in this paper.

scholarly journals Voltage Stability Analysis and Stability Improvement of Power System

2015 ◽  
Vol 5 (2) ◽  
pp. 189 ◽  
Author(s):  
Pavithren Pavithren ◽  
Raman Raghu Raman ◽  
Pratap Nair ◽  
K. Nithiyananthan
Keyword(s):  
Stability Analysis ◽  
Power Systems ◽  
Power System ◽  
Voltage Stability ◽  
Research Work ◽  
Voltage Collapse ◽  
Interconnected System ◽  
Voltage Instability ◽  
System A ◽  
The Stability

<p>The main objective of this research work is to analysis the voltage stability of the power system network and its improvement in the network.voltage stability of a power system. A system enters a state of voltage instability when a disturbance, increase in load demand, or change in system condition causes a progressive and an uncontrollable drop in voltage or voltage collapse. The continuing increase in demand for electric power has resulted in an increasingly complex, interconnected system, forced to operate closer to the limits of the stability. This has necessitated the implementation of techniques for analyzing and detecting voltage collapse in bus bar or lines prior to its occurrence. Simple Newton Raphson algorithm based voltage stability analysis has been carried out. Matlab based simulations for all the factors that causes voltage instability has been implemented and analyzed for an IEEE 30 bus system. The proposed model is able to identify the behavior of the power systems, network under various voltage stability conditions and its possibility of recovery/stability improvement of the power system network has been discussed.</p>

Improvement of Transient Voltage Stability of the Wind Farm Using SVC

2012 ◽  
Vol 608-609 ◽  
pp. 653-657 ◽  
Author(s):  
Yong Bin Zhao ◽  
Jun Yang ◽  
Qiu Ye Sun ◽  
Xu Huang
Keyword(s):  
Control Strategy ◽  
Voltage Stability ◽  
Wind Farm ◽  
Transient Stability ◽  
Control Performance ◽  
Transient Voltage Stability ◽  
Orientation Vector ◽  
Wind Power System ◽  
Transient Voltage ◽  
The Stability

Static var compensator (SVC) is used to improve transient voltage stability of the asynchronous wind farm. The issue of voltage stability and transient stability of wind power system are also addressed. A novel control strategy of SVC is proposed instead of the types of traditional feedforward and uniline feedback to control SVC. The proposed method makes control performance better and the compensation efficiency higher. At the same time, balanced compensation strategy of orientation vector conversion is applied instead of traditional model of steady-state phasor to calculate the compensation electrical susceptance. Using this method can overcome the shortcoming of dynamic characteristics and adaptability. At last, the simulation results indicate this control strategy could improve the stability of wind farm effectively and quickly.

scholarly journals Voltage collapse point evaluation considering the load dependence in a power system stability problem

2020 ◽  
Vol 10 (1) ◽  
pp. 61 ◽  
Author(s):  
Zaid Garcia Sanchez ◽  
Jose Antonio González ◽  
Gustavo Crespo ◽  
Hernan Hernandez Herrera ◽  
Jorge Iván Silva
Keyword(s):  
Power Systems ◽  
Stability Problem ◽  
Voltage Stability ◽  
Electrical Power ◽  
Maximum Load ◽  
Point Load ◽  
System Stability ◽  
Voltage Collapse ◽  
Load Dependence ◽  
The Stability

<span lang="EN-US">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.</span>

scholarly journals Analysis of PSVR Transient Voltage Stability Based on RTDS

2019 ◽  
Vol 223 ◽  
pp. 012046
Author(s):  
Siyuan Guo ◽  
Junying Song ◽  
Shaolang Ma ◽  
Li Li ◽  
Yongsheng Zhao
Keyword(s):  
Voltage Stability ◽  
Transient Voltage Stability ◽  
Transient Voltage
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