With increasing application sensitive electronic loads and digital controllers, there is a need for quality power to be delivered to the consumer of electricity. In case of poor power quality there can be economic consequences and cost business millions of rupees each year in revenue loss, process improvements ,opportunity loss and equipment failure. Maintaining power quality and reliability is also an important feature of smart grid. Understanding power quality phenomena has become an important part of electrical engineering education and undergraduate and post graduate syllabus. The challenges of understanding the scenarios in which a power quality event like voltage sag can take up various characterisations can be overcome with simulating these.