A New Approach to Improve Power Quality by Reducing Voltage Flicker Using D-STATCOM

The suitability of electric power to consumers is determined by power quality. The emphasis on power system efficiency has led to growth in application of power electronic based devices. Dependency on renewable energy resources having converters for integration purposes have also contributed to power quality problems. Growing difference between the generated power and power demand has aggravated the problem. The main aim of improving power quality is basically to enhance the reliability of power supply. The consequence of power quality problem may cause the device or system to misoperate or fail. There are both internal and external factors affecting the quality of power. An attempt has been made to improve power quality using active and passive filters, hybrid filters and newly introduced custom power devices. In this paper most common power quality problem voltage flicker is discussed and is mitigated using a multi-pulse converter D-STATCOM due to its flexibility and fast response. The test model for the investigation has been simulated in MATLAB/SIMULINK

Keywords:

power quality , voltage flicker , harmonics , point of common coupling , voltage source inverter , D-STATCOM