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.

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 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.

scholarly journals The Performance of the BTB-VSC for Active Power Balancing, Reactive Power Compensation and Current Harmonic Filtering in the Interconnected Systems

Energies ◽  
2020 ◽  
Vol 13 (4) ◽  
pp. 831 ◽  
Author(s):  
Janeth Alcalá ◽  
Víctor Cárdenas ◽  
Alejandro Aganza ◽  
Jorge Gudiño-Lau ◽  
Saida Charre
Keyword(s):  
Reactive Power ◽  
Harmonic Distortion ◽  
Reactive Power Compensation ◽  
Active Power ◽  
Performance Criteria ◽  
Voltage Source ◽  
Voltage Source Converter ◽  
Current Harmonics ◽  
Current Harmonic ◽  
Harmonic Filtering

Nowadays, the use of power converters to control active and reactive power in AC–AC grid-connected systems has increased. With respect to indirect AC–AC converters, the tendency is to enable the back-to-back (BTB) voltage source converter (VSC) as an active power filter (APF) to compensate current harmonics. Most of the reported works use the BTB-VSC as an auxiliary topology that, combined with other topologies, is capable of active power regulation, reactive power compensation and current harmonic filtering. With the analysis presented in this work, the framework of the dynamics associated with the control loops is established and it is demonstrated that BTB-VSC can perform the three tasks for which, in the reviewed literature, at least two different topologies are reported. The proposed analysis works to support the performance criteria of the BTB-VSC when it executes the three control actions simultaneously and the total current harmonic distortion is reduced from 27.21% to 6.16% with the selected control strategy.

Incorporation of a Redox Flow Battery in a Wind-Diesel Power System for Simultaneous Frequency and Voltage Control

2008 ◽  
Vol 32 (2) ◽  
pp. 179-195 ◽  
Author(s):  
Shameem Ahmad Lone ◽  
Mairajud-Din Mufti ◽  
Shiekh Javed Iqbal
Keyword(s):  
Power System ◽  
Reactive Power ◽  
Current Control ◽  
Voltage Source ◽  
Frequency Regulation ◽  
Voltage Source Converter ◽  
Redox Flow Battery ◽  
Flow Battery ◽  
Energy Storage Devices ◽  
Battery System

Energy storage devices are required for power quality maintenance in stand alone power systems like wind-diesel ones. A redox flow battery system has many virtues which make its integration with a wind-diesel power system attractive. This paper proposes the integration of a redox flow battery system with a typical multi-machine wind-diesel power system for simultaneous voltage and frequency regulation. The redox flow battery is connected to wind park bus through a current controlled voltage source converter based on hysterisis current control. Keeping in view the non-linear and time varying nature of the hybrid wind-diesel-redox flow battery system, neuro-adaptive control is proposed for active/reactive power modulation of the redox flow battery.

The Application of the UPFC in Power System

2013 ◽  
Vol 457-458 ◽  
pp. 1371-1376
Author(s):  
Xin Hua Xiong ◽  
Zun Nan Min ◽  
Ting Jian Zhong
Keyword(s):  
Power System ◽  
Reactive Power ◽  
Transmission System ◽  
Characteristic Functions ◽  
Electricity Transmission ◽  
Flexible Ac Transmission ◽  
Flexible Ac Transmission System ◽  
The Stability ◽  
Ac Transmission ◽  
Compensation Function

UPFC is one of the flexible ac transmission system (FACTS) compensation devices, it has a comprehensive compensation function, UPFC has the characteristic functions as follows: fast anddynamical adjusting the parameters of electricity transmission system, such as voltage, impedance, phase angle, active power and reactive power, expanding thecapacity of electricity transmission, improving the stability of power system and optimizing the operation of power system.So it is a perfect fashion for active and reactive power controller, and also it has the function of regulating voltage.

Sign in / Sign up

Export Citation Format

Share Document