She–PWM Cascaded Seven level Inverter With Adjustable DC Voltage Levels Control For D-Statcom Applications
Journal Title: International Journal of Science Engineering and Advance Technology - Year 2015, Vol 3, Issue 8
Abstract
In this paper presents a new multilevel selective harmonic elimination pulse-width modulation (MSHE–PWM) technique for transformer less static synchronous compensator (STATCOM) system employing cascaded H-bridge inverter (CHI) configuration. The proposed MSHE–PWM method optimizes both the dc-voltage levels and the switching angles, enabling more harmonics to be eliminated without affecting the structure of the inverter circuit. The method provides constant switching angles and linear pattern of dc-voltage levels over the modulation index range. This in turns eliminates the tedious steps required for manipulating the offline calculated switching angles and therefore, easing the implementation of the MSHE–PWM for dynamic systems. Although the method relies on the availability of the variable dc-voltage levels which can be obtained by various topologies, however, the rapid growth and development in the field of power semiconductor devices led to produce highefficiency dc–dc converters with a relatively highvoltage capacity and for simplicity, a buck dc–dc converter is considered in this paper. Current and voltage closed loop controllers are implemented for both the STATCOM and the buck converter to meet the reactive power demand at different loading conditions. The technique is further compared with an equivalent conventional carrierbased pulse-width modulation to illustrate its enhanced characteristics. The effectiveness and the theoretical analysis of the proposed approach are verified through both simulation and experimental studies.
Authors and Affiliations
Rani Hepsiba| M. Tech Student in PE &ED Pragati Engineering College, Surampalem, P. V. Prasuna| Asst. Prof.in EEE Dept. Pragati Engineering College, Surampalem
Keywords
Related Articles
- EP ID EP16536
- DOI -
- Views 306
- Downloads 12
Studies on Dynamic Mechanical Analysis and Morphology of Carbon Soot Filled Un saturated Polyester Graded Composites
Dynamic mechanical behaviour of carbon soot filled polyester graded composites was determined with reference to carbon soot concentration present at different positions of the graded composites. At lower temperatures...
Under water Image preprocessing by Average filter and a comparison study
Underwater image pre-processing is extremely essential because, under water images suffer from quality degradation due to low transmission of light. When an underwater image is captured, pre-processing is necessary t...
A Secure Protocol for M-commerce Secure SMS Mobile Payment
The worldwide utilization of the Internet has profoundly supplied the development of e-commerce. Technological advancement in mobile phones (e.g. Mobile phones) has likewise added to doing ecommerce by means of mobile...
Efficient Solution For Searchable Data Sharing In Public Cloud
Cloud storage providing more facilities like on demand access and convenient Sharing of data by internet. This cloud storage suffers from security as well as data leakage. The main challenging problem is designing ef...
A Standard Module Of Dc Dps – Aacc To Enhance The Stability Of Cascaded System
In a dc DPS there are a range of ways to attach the subsystems among which a typical connection style is cascaded converters. The cascaded system may have stability problem due to the interaction between the subsyste...