Defense mechanisms for grid disturbance in India due to power swing in the interconnected grids

Electricity is the driving force of the economy in the 21^st century. It is clean, easy to transport and easy to use so much, so that it has replaced most of the other sources of energy and become the energy of choice. In such circumstances the non availability of electricity results not only in individual discomfort but also puts brakes on the wheels of the industry and commercial units due to a breakdown in insulation between high voltage systems and earth resulting in short circuit. Due to large change in load the interconnected grid causes loss of a large load/generation which results in power swing flow in transmission lines getting rapidly changed / redistributed to meet the new network configuration and load generation balance. For this reason the power sector is not able to continuous supply the electricity. When the power sector is a capital intensive industry and a sufficient return on the large investment in the equipment, which goes to make up the power system, must be ensured for a financial healthiness, which is an important facilitator of operational healthiness. Hand in hand the satisfaction of consumers is to be ensured by providing reliable, quality uninterrupted service. This is possible only if the whole system is kept in operation continuously without major breakdowns. To minimise the effect of power swing in the interconnected grids several defence mechanisms are study.