A COMBINED ULTRA CAPACITOR AND DYNAMIC VOLTAGE RESTORER FOR MITIGATING VOLTAGE SAG AND SWELL IN POWER QUALITY OF THE DISTRIBUTION GRID
Journal Title: International Journal of Engineering Sciences & Research Technology - Year 0, Vol 5, Issue 1
Abstract
The most severe power quality problems in electrical systems are called as voltage sag and swell. These power quality problems must be compensated accurately. There are two voltage injection strategies to inject controlled voltage via dynamic voltage restorer (DVR) in electrical systems. The proposed power conditioner has active power capability which is useful in mitigating the grid intermittencies and in improving the voltage sag and swell compensation. Here, energy storage is integrated into dc-link of the power conditioner through a bidirectional dc-dc converter that helps in providing a stiff dc-link voltage. The integration helps in providing active/reactive power support, intermittency smoothing, sag/swell compensation and harmonic compensation. The power conditioner operates in five different modes, each of which has been analyzed. The novel contribution of this paper lies in the integration of rechargeable UCAP-based energy storage into the DVR topology. With this integration, the UCAP-DVR system will have active power capability and will be able to independently compensate temporary voltage sags and swells without relying on the grid to compensate for faults on the grid like in the past. UCAP is integrated into dc-link of the DVR through a bidirectional dc–dc converter, which helps in providing a stiff dc-link voltage, and the integrated UCAP-DVR system helps in compensating temporary voltage sags and voltage swells, which last from 3 s to 1 min. Complexities involved in the design and control of both the dc–ac inverter and the dc–dc converter are discussed. The simulation model of the overall system is developed and compared to the experimental hardware setup.
Authors and Affiliations
K. C. Anandhan
Keywords
Related Articles
- EP ID EP112111
- DOI -
- Views 70
- Downloads 0
A Novel Framework for Composite Network Security Situation Assessment Using HRCAL Approach
In the present era computer network is taken as the core component of various technology supported areas such as banking sector, emergency systems and communication areas. With this increase in network usage the k...
Secure Data Transfer based on Wavelet Transform from Cryptographic and Steganographic Techniques
In today’s world, there are a number of cryptographic and steganographic techniques used in order to have secured data transfer between a sender and a receiver. In this paper we present a new hybrid approach that...
A NEW METHOD FOR REDUCING THE EFFECTS OF INCREASING INFORMATION IN DIGITAL IMAGE STEGANOGRAPHY
Nowadays, in order to transfer data, security is one of the most important parameters in the evaluation for transmission techniques. According to the development communicational devises, possibility of data theft submi...
SYNTHESIS AND CHARACTERIZATION OF TiO2NANOCRYSTALS BY SOL-GEL METHOD AND STUDY THE EFFECT OF CALCINATION TEMPERATURE ON ITS PHOTOCATALYTIC ACTIVITY
TiO2 nanoparticles were prepared by a simple sol-gel method at different calcinations temperature. The prepared samples were characterized by X-ray diffraction andUV visible spectroscopy techniques. Hydroxyl radicals (•...
A FEM BASED APPROACH TO FIND THE STIFFNESS MATRIX, GLOBAL CO - EFFICIENT MATRIX AND NODE VOLTAGES OF WAVEGUIDE IN DIFFERENT MODELS
The Paper discusses the usage of Finite element method (FEM) in order to find triangular element Stiffness, Global co - efficient matrices of each model and calculate all node voltages by using Band matrix method o...