scholarly journals Modelling, Simulation and Fuzzy Self-Tuning Control of D-STATCOM in a Single Machine Infinite Bus Power System

2019 ◽  
Vol 12 (1) ◽  
pp. 5-11
Author(s):  
Chaib Habib ◽  
Allaoui Tayeb ◽  
Brahami Mustapha ◽  
Mouloud Denai
Keyword(s):  
Power System ◽  
Single Machine ◽  
Dynamic Performance ◽  
System Stability ◽  
Flexible Ac Transmission ◽  
Clearing Time ◽  
Self Tuning ◽  
Single Machine Infinite Bus ◽  
Ac Transmission ◽  
Modelling Simulation

Background: In recent years, demand for electricity has increased considerably, while the expansion of generation and transmission has been very slow due to limited investment in resources and environmental restrictions. Methods: As a result, the power system becomes vulnerable to disturbances and instability. FACTS (Flexible AC Transmission Systems) technology has now been accepted as a potential solution to this problem. This paper deals with the modelling, simulation and fuzzy self-tuning control of a DSTATCOM to enhance the stability and improve the critical fault clearing time (CCT) in a single machine infinite bus (SMIB). A detailed modelling of the D-STATCOM and comprehensive derivation of the fuzzy logic self-tuning control is presented. Results: The dynamic performance of the power system with the proposed control scheme is validated through in a simulation study carried out under Matlab/Simulink and SimPowerSystems toolbox. Conclusion: The results demonstrate a significant enhancement of the power system stability under the simulated fault conditions considered.

L-Index Modulated Voltage Source Converter

2008 ◽  
Vol 9 (5) ◽  
Author(s):  
Damian O Dike ◽  
Satish M Mahajan
Keyword(s):  
Power System ◽  
Reactive Power ◽  
Reactive Power Compensation ◽  
Voltage Source ◽  
Voltage Source Converter ◽  
Flexible Ac Transmission ◽  
Self Tuning ◽  
Modulation Signal ◽  
Status Indicator ◽  
Ac Transmission

A strategy is presented for the self-tuning of a voltage source converter (VSC) based Flexible AC Transmission Systems (FACTS) according to the prevailing system condition. L-index, which is a power system voltage stability status indicator, and its associated parameters are used to automatically regulate the modulation signal of the VSC. This will lead to a proportionate adjusting of the magnitude of the current injected into, or absorbed from, the interconnected load bus by the FACTS device. This regulating scheme will enhance seamless and optimal reactive power compensation by utilizing the dynamic operational nature of present day distressed power system networks. Results obtained using this method when applied to selected load buses of the IEEE 14 bus system under varying practical scenarios showed its capability to appropriately control FACTS devices operation to accommodate system changing conditions. It is hoped that the outcome of this work will provide efficient tools for the determination of power system status, ensure optimal utilization of the dynamic reactive power compensation devices and reduce system outages.

Investigation of Modified Generalized Interline Power Flow Controller (GIPFC) and Performance Analysis

2014 ◽  
Vol 622 ◽  
pp. 111-120
Author(s):  
Ananthavel Saraswathi ◽  
S. Sutha
Keyword(s):  
Power System ◽  
Power Flow ◽  
Test System ◽  
Transmission System ◽  
System Stability ◽  
Flexible Ac Transmission ◽  
Flexible Ac Transmission System ◽  
Flow Controller ◽  
Ac Transmission ◽  
Power Flow Controller

Nowadays in the restructured scenario, the main challenging objective of the modern power system is to avoid blackouts and provide uninterrupted quality power supply with dynamic response during emergency to improve power system security and stability. In this sense the convertible static compensator (CSC) that is the Generalized Inter line power flow controller (GIPFC), can control and optimize power flow in multi-line transmission system instead of controlling single line like its forerunner FACTS (Flexible AC Transmission System) controller. By adding a STATCOM (Static synchronous Shunt Converter) at the front end of the test power system and connecting to the common DC link of the IPFC, it is possible to bring the power factor to higher level and harmonics to the lower level and this arrangement is popularly known as Generalized Inter line power flow controller (GIPFC). In this paper a new concept of GIPFC based on incorporating a voltage source converter with zero sequence injection SPWM technique is presented for reinforcement of system stability margin. A detailed circuit model of modified GIPFC is developed and its performance is validated for a standard test system. Simulation is done using MATLAB Simulink.Index Terms—Convertible static controller, Flexible AC Transmission System (FACTS), Generalized Interline Power Flow Controller (GIPFC),STATCOM, SSSC, Reactive power compensation.

scholarly journals A FACTS Devices Allocation Procedure Attending to Load Share

Energies ◽  
2020 ◽  
Vol 13 (8) ◽  
pp. 1976 ◽  
Author(s):  
Samuel Marrero Vera ◽  
Ignacio Nuez ◽  
Mario Hernandez-Tejera
Keyword(s):  
Power System ◽  
Test System ◽  
System Stability ◽  
Objective Functions ◽  
Flexible Ac Transmission ◽  
Facts Devices ◽  
Allocation Procedure ◽  
Variable Generation ◽  
Electrical Demand ◽  
Ac Transmission

Power system stability is a topic which is attracting considerable interest due to the increase of both electrical demand and distributed variable generation. Since Flexible AC Transmission Systems (FACTS) devices are an increasingly widespread solution to these issues, it is important to study how their allocation procedure should be done. This paper seeks to assess the influence of load share in FACTS devices allocation. Despite this interest, researchers, as well as system planners, have mainly focused on studying single power system configuration rather than using a wider approach. Keeping this in mind, we have iteratively created several load share scenarios based on an IEEE 14-bus test system. Subsequently, we have applied an heuristic procedure in order to demonstrate how load share may affect the results of the FACTS devices allocation procedure. Additionally, we have compared results from two different objective functions so as to evaluate our proposal. Finally, we have proposed a solution to FACTS allocation which takes load share into account. Our tests have revealed that, depending on the distribution of load within the power system, the optimal location for a FACTS device may change. Furthermore, we have also found some discrepancies and similarities between results from distinct objective functions.

APPLICATION OF GENETIC ALGORITHM FOR PSS AND FACTS-BASED CONTROLLER DESIGN

2008 ◽  
Vol 05 (04) ◽  
pp. 607-620 ◽  
Author(s):  
SIDHARTHA PANDA ◽  
NARAYANA PRASAD PADHY
Keyword(s):  
Genetic Algorithm ◽  
Power System ◽  
Controller Design ◽  
Optimization Technique ◽  
System Stability ◽  
Nonlinear Simulation ◽  
Flexible Ac Transmission ◽  
Flexible Ac Transmission System ◽  
System Stabilizer ◽  
Ac Transmission

This paper investigates the application of genetic algorithm (GA) for the design of a power system stabilizer (PSS) and a flexible ac transmission system (FACTS)–based controller to enhance power system stability. The design problem of the proposed controllers is formulated as an optimization problem and the GA optimization technique is employed to search for optimal controller parameters. The proposed controllers are tested on a weakly connected power system under various disturbances and loading conditions, and compared with a conventional PSS (CPSS). The eigenvalue analysis and nonlinear simulation results show the effectiveness and robustness of the proposed controllers.

Review of STATCOM Effects on Relay Protection of Power System

2013 ◽  
Vol 811 ◽  
pp. 639-642
Author(s):  
Xue Song Zhou ◽  
Chun Ji ◽  
You Jie Ma
Keyword(s):  
Power System ◽  
Reactive Power ◽  
New Technology ◽  
Dynamic Performance ◽  
Reactive Power Compensation ◽  
It Use ◽  
Flexible Ac Transmission ◽  
Compensation Device ◽  
The Stability ◽  
Ac Transmission

Flexible AC transmission technology (FACTS) is a new technology developed in recent years. It use power electronic technology and modern control technology to achieve fast control for AC transmission system parameter and structure [, to achieve the rational allocation of transmission power, reduce the power loss and the cost of power generation, greatly improve the stability and reliability of the system. STATCOM is based on the principle of reactive power compensation, using full-controlled switching devices to compose self-commutated inventer, complemented by small-capacity storage elements constitute reactive power compensation device. Its role in the power system is the compensation of reactive power, maintain the voltage of the connection point, improve system voltage stability, and improve the steady performance and dynamic performance of the system.

scholarly journals FUZZY LOGIC STATIC SYNCHRONOUS COMPENSATOR (FLSTATCOM)

2016 ◽  
Vol 15 (1) ◽  
pp. 34
Author(s):  
I Made Mataram
Keyword(s):  
Fuzzy Logic ◽  
Single Machine ◽  
Transmission System ◽  
Static Synchronous Compensator ◽  
Flexible Ac Transmission ◽  
Flexible Ac Transmission System ◽  
Single Machine Infinite Bus ◽  
Ac Transmission

Penerapan teknik fuzzy membawa perubahan yang signifikan khusus pada perhitungan dan analisis sistem konvensional. Peranan peralatan FACTS (Flexible AC Transmission System) untuk memperbaiki kualitas tegangan dari pembangkit menuju beban sangat besar. STATCOM merupakan peralatan paling berpengaruh untuk memperbaiki tegangan pada jaringan transmisi tenaga listrik. Pembahasan pada penelitian ini dikhususkan pada FLSTATCOM. Model Fuzzy Logic dengan dua input digunakan sebagai pengontrol IGBT, sehingga mampu meningkatkan unjuk kerja STATCOM konvensional. Sistem Single Machine Infinite Bus menjadi sistem uji coba penggunaan FLSTATCOM.Hasil simulasi menggunakan simulink MATLAB, diperoleh nilai tegangan pada tiap sisi terima tanpa menggunakan STATCOM menghasilkan tegangan sebesar 217,3 kV, menggunakan STATCOM menghasilkan tegangan sebesar 220 kV, dan penggunaan FLSTATCOM mampu meningkatkan tegangan menjadi 228,9 kV (5,34%) DOI: 10.24843/MITE.1501.06

scholarly journals Improving Power System Stability Using Transfer Function: A Comparative Analysis

2017 ◽  
Vol 7 (5) ◽  
pp. 1946-1952
Author(s):  
G. Shahgholian ◽  
A. Fattollahi
Keyword(s):  
Transfer Function ◽  
Power System ◽  
Closed Loop ◽  
Damping Ratio ◽  
Dynamic Performance ◽  
System Stability ◽  
Closed Loop System ◽  
Simulation Results ◽  
Single Machine Infinite Bus ◽  
Signal Dynamic

In this paper, a small-signal dynamic model of a single-machine infinite-bus (SMIB) power system that includes IEEE type-ST1 excitation system and PSS based on transfer function structure is presented. The changes in the operating condition of a power system on dynamic performance have been examined. The dynamic performance of the closed-loop system is analyzed base on its eigenvalues. The effectiveness of the parameters changes on dynamic stability is verified by simulation results. Three types of PSS have been considered for analysis: (a) the derivative PSS, (b) the lead-lag PSS or conventional PSS, and (c) the proportional-integral-derivative PSS. The objective function is formulated to increase the damping ratio of the electromechanical mode eigenvalues. Simulation results show that the PID-PSS performs better for less overshoot and less settling time compared with the CPSS and DPSS under different load operation and the significant system parameter variation conditions.

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