scholarly journals Could Converter Domination Lead to Better Voltage Stability in AC Transmission? - An Overview

2021 ◽  
Author(s):  
Dong Chen ◽  
Zehua Zhang
Keyword(s):  
Voltage Stability ◽  
Ac Transmission

scholarly journals Effect of SVC installation on loss and voltage in power system congestion management

2019 ◽  
Vol 14 (1) ◽  
pp. 428 ◽  
Author(s):  
Nur Zahirah Mohd Ali ◽  
Ismail Musirin ◽  
Hasmaini Mohamad
Keyword(s):  
Power System ◽  
Voltage Stability ◽  
Optimization Technique ◽  
Stability Index ◽  
Evolutionary Programming ◽  
Congestion Management ◽  
Optimal Operation ◽  
Voltage Profile ◽  
Voltage Stability Index ◽  
Ac Transmission

<span>In this paper, a new hybrid optimization technique is proposed namely Adaptive Embedded Clonal Evolutionary Programming (AECEP). This idea comes from the combination part of the clone in an Artificial Immune System (AIS) and then combined with Evolutionary Programming (EP). This technique was implemented to determine the optimal sizing of Flexible AC Transmission Systems (FACTS) devices. This study focused on the ability of Static Var Compensator (SVC) is used for the optimal operation of the power system as well as in reducing congestion in power system. In order to determine the location of SVC, the previous study has been done using pre-developed voltage stability index, Fast Voltage Stability Index (FVSI). Congested lines or buses will be identified based on the highest FVSI value for the purpose of SVC placement. The optimizations were conducted for the SVC sizing under single contingency, where SVC was modeled in steady state analysis. The objective function of this study is to minimize the power loss and improve the voltage profile along with the reduction of congestion with the SVC installation in the system. Validation on the IEEE 30 Bus RTS and IEEE 118 Bus RTS revealed that the proposed technique managed to reduce congestion in power system.</span>

scholarly journals INFLUENCE OF TCSC FACTS DEVICE ON STEADY STATE VOLTAGE STABILITY

2013 ◽  
pp. 84-94
Author(s):  
GABER EL-SAADY ◽  
MOHAMED A. A. WAHAB ◽  
MOHAMED M. HAMADA ◽  
M. F. BASHEER
Keyword(s):  
Steady State ◽  
Power Flow ◽  
Voltage Stability ◽  
Control Function ◽  
Stability Index ◽  
Flexible Ac Transmission ◽  
Voltage Dependent ◽  
Voltage Stability Enhancement ◽  
Ac Transmission ◽  
Stability Enhancement

The influence of series Flexible AC Transmission Systems (FACTS) device namely, Thyristor-Controlled Series Capacitors (TCSC) on the steady state voltage stability is the main objective of this paper. The Line stability Index LSI under excepted lines outage contingencies is used to identify the critical line which is considered as the best location for TCSC. A modal analysis is used to define the weakest bus of the studied system. The FACTS device is implemented and included into the Newton-Raphson power flow algorithm, and the control function is formulated to achieve the voltage stability enhancement goal. The analysis is preformed on standard IEEE 30 bus system. The proposed scheme are tested under different loading conditions and different nonlinear voltage dependent loads. The simulation results demonstrate the feasibility and effectiveness of the device and the proposed algorithm.

scholarly journals Voltage Stability Improvement By Using FACTS Elements With Economic Consideration

2015 ◽  
Vol 37 ◽  
pp. 162 ◽  
Author(s):  
Hadi Kianersi ◽  
Hamid Asadi
Keyword(s):  
Power Systems ◽  
Voltage Stability ◽  
System Stability ◽  
Stability Margins ◽  
Flexible Ac Transmission ◽  
Operation Conditions ◽  
Facts Devices ◽  
Generation Cost ◽  
Thyristor Controlled Series Capacitor ◽  
Ac Transmission

In last two decades due to increasing power demand power systems are operated to their maximum operation conditions. It will cause to any problems that one of these is voltage instability. To overcome this problem Flexible AC Transmission Systems(FACTS) have been used in power systems. The FACTS devices improves system stability, reduce losses and power generation cost. Best location of FACTS devices will help to maintain bus voltages at desired level, reduce cost of these devices and improve voltage stability margins. This paper presents the methods to location and rating of FACTS devices are optimized with using weighted coefficients method and Sterength Paretto Evolutionary Algorithm(SPEA).Thyristor controlled series capacitor(TCSC)and Static Var Compensator(SVC)are also considered in this paper.

scholarly journals Improving Voltage Stability of Electrical Power System by Optimal Location of FACTS Devices Using an Evolutionary Method

2021 ◽  
Vol 65 (1) ◽  
pp. 108-112
Author(s):  
Soufiane Lemdani ◽  
Habib Benbouhenni
Keyword(s):  
Power Systems ◽  
Voltage Stability ◽  
Optimization Technique ◽  
Electrical Power ◽  
Optimal Location ◽  
Electrical Networks ◽  
Electrical Power System ◽  
Flexible Ac Transmission ◽  
Facts Devices ◽  
Ac Transmission

In the present work, a new approach for improving voltage stability by optimal location of the Flexible AC Transmission Systems (FACTS) devices has been discussed. We used Genetic Algorithm (GA) as an optimization technique to search the good placements of different FACTS systems in great electrical networks and its contribution to enhance voltage stability. Various FACTS devices were used in our study such as SVC, TCSC, SSSC, STATCOM, TCVR, TCPST and UPFC. The search of optimal parameters of those devices has been also investigated. The method presented in the paper was tested by using Matlab/environment. In addition, the proposed method has been implemented and tested on various IEEE power systems; 14Bus, 57Bus, and 118Bus. The obtained results show the validity of the proposed method.

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