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Rajasekaran, D.
- Distributed STATCOM for Voltage Sag and Harmonics Compensation
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Affiliations
1 Electrical and Electronics Engineering Department, R.M.D. Engineering College, Kavaraipettai, Chennai, Tamil Nadu, IN
2 Electrical and Electronics Engineering Department, SRM University, Kattankulathur, Chennai, Tamil Nadu, IN
1 Electrical and Electronics Engineering Department, R.M.D. Engineering College, Kavaraipettai, Chennai, Tamil Nadu, IN
2 Electrical and Electronics Engineering Department, SRM University, Kattankulathur, Chennai, Tamil Nadu, IN
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Digital Signal Processing, Vol 3, No 11 (2011), Pagination: 536-540Abstract
Devices such as power electronics converters inject harmonic currents in the AC system and increase overall reactive power demanded by the loads. Also the number of sensitive loads that require ideal sinusoidal supply voltages for their proper operation has increased. In order to keep power quality under limits proposed by standards, it is necessary to include some sort of compensation. Traditionally, fixed, mechanical switched reactor/capacitor banks and Static Var Compensator have been used for improving the power quality issue in distribution systems. In recent years, applications of inverter based power quality conditioner have been growing for reactive power compensation in distribution systems, since their response is faster than that of the conventional compensators. Distribution STATCOM (D-STATCOM) is an inverter based power quality conditioner device used to improve the power quality issues in distribution systems. This paper deals with modeling and simulation of DSTATCOM with Energy Storage System based on the synchronous reference frame method for improving the power quality (mitigation of voltage sag and harmonics compensation) of distribution systems. Simulation of DSTATCOM is carried out using simulink in MATLAB. Simulation studies demonstrate the effectiveness of the proposed control approaches in the synchronous-rotating d-q reference frame for DSTATCOM to improve power quality issues in Distribution System.Keywords
DSTATCOM, Voltage Sag, Harmonics Compensation, VSI, SIMULINK, Synchronous Reference Frame (SRF) Theory.
- Environmental Pollution by Gold Mining-A Case Study of Robertsonpet (K.G.F.) Urban Agglomeration, Karnataka
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PDF Views:1
Authors
Affiliations
1 Department of Geography, Government Arts College, Bangalore-560 001, Karnataka, IN
1 Department of Geography, Government Arts College, Bangalore-560 001, Karnataka, IN
Source
Nature Environment and Pollution Technology, Vol 6, No 4 (2007), Pagination: 589-594Abstract
Man by his own activities, has jeopardized the ecological systems, upon which the very existence of humans depends, and has caused such a large scale environmental degradation which has posed a threat to his own survival. Among various anthropogenic activities, mining is an important activity which has lead to severe environmental degradation. The wastes generated by mining activities have to be disposed off in such a way that minimum impact is seen on the ecosystems. The study area namely Kolar Gold Fields (K.G.F.) presently called Robertsonpet Urban Agglomeration, has huge gold mining waste dumps resulted due to disposal of the mining mill tailing material. It is big problem and causes contamination of land, air and water. Present study highlights the impact of these huge mining mill tailing dumps, locally called cyanide dumps, on the township and its inhabitants. Study has also suggested some remedial measures to be taken to minimize environmental pollution in the study area.Full Text