A Review on Strategies to Control Frequency Variation in Deviation Settlement Mechanism

Availability based tariff (ABT) came into power in India to overcome stability issues of grid. The grid was undisciplined due to large variation of power frequency due to unscheduled over injection and under injection of power without worrying about the frequency. However, the ABT was introduced to increase the generation capacity of grid but it has been slowly adopted as profit making system. Now, (Deviation Settlement Mechanism) DSM has been introduced in India as a frequency-based technique and does not depends on any real world market conditions. The frequency deviation describes the over/ under injection of power that feeds to DSM penalty. This review paper deals with the recent studies carried out in drawing down the strategies to discourage deviation (frequency) from schedule, operation within frequency band and by ensuring grid security. In addition to this, a basic control strategy has also been reviewed that can be adopted in implementing a topology for control over frequency variation from generation end. This paper deals with the basic discussions over implementation of DSM as per guidelines of CERC and MERC and few possible power devices and its methods to control frequency variation based on some past researches.