A Study on Renewable Energy Sources Using Modular Multilevel Converter in Finding Power Quality

Power quality is very important aspect in power system. The harmonics in power systems are produced by various electronic devices. Conventional inverters produce more harmonics and distortions in power system which can be reduced by filters with increase in size and cost. The advances in technologies have led the power capacity of the renewable energy system to grow. It can be a problem to integrate the renewable energy sources to the conventional grid in terms of the stability, voltage regulation and power quality issues. The proposed power converter does not need to employ the large interface inductor at input side and the huge electrolytic capacitor at DC lin. it utilizes high-frequency transformers for the galvanic isolation instead of bulky line-frequency transformers. Compared with the existing multilevel converters, one of the most desirable advantages offered by MMC may be its ability to process both active power and reactive power with its terminals directly connected to high-voltage networks. D-STATCOM (Distribution Static Compensator) is a shunt device which is generally used to solve power quality problems in distribution systems. In this concept in future by increasing the levels of Multilevel Inverter we improve the power quality.