ABT 4th and 5th DSM Amendment Concept

  • ABT 4th DSM Amendment

  1. Frequency Band has been tightened to 50.05 to 49.85
  2. Deviation Price Vector linked to Daily Average Area Cleaning Price(ACP) in Day Ahead Market of Power Exchange.
  3. Cap Rate For all Generator.
  4. In the event of sustained deviation from SG in one direction (positive or negative) by any regional entity , such regional entity shall have to change sign of their deviation from schedule, at least once, after every 6 time blocks.
  5. Calculation 1% Deviation During Day.
  6. Pfactor Calculate by Equitation Given by DSM Regulations.
  7. Penalty count for sustain deviation.

ABT dashbaord


  • Summery of DSM 4th Amendment

  • Over Injection

  1.  Frequency( f) <= 50.04 Hz  : Rate of UI charge is Minimum of calculated value as per Area Clearing Price(P)  or Cap limit (3.0304 rupees).               
  2. Frequency (f) >= 50.05 Hz : Penalty rate of Over injection is as per ACP(P) value.Over Injection

  • Under Injection
  1. Frequency(f) < 49.85 Hz :Deviation Charge - Rs  3.0304 Additional deviation charge(ADC) – Rs  3.0304 Total penalty = Rs 6.0608
  2. Frequency between 49.85-50.04 Hz :Deviation charge is Minimum of calculated value as per Area Clearing Price(P)  or Cap limit (3.0304 rupees) If UI exceeds 12% of SG , then total charges = DC +ADC
           DC = Minimum of calculated value as per Area Clearing Price(P)  or Cap limit (3.0304 rupees)
           ADC for 12%  to 15% of SG = 20% of Minimum of ACP(P) or Cap rate(3.0304)
           ADC for 15%  to 20% of SG = 40% of Minimum of ACP(P) or Cap rate(3.0304)
           ADC for >20% of SG = 100% of Minimum of ACP(P) or Cap rate(3.0304)
    3.   Frequency(f) >= 50.05 Hz : No penalty for under injection.

  • Sign Change
      -->   For one sign change violation , charges = 20% of Day deviation charge
              For two sign change violation , charges = 2x20% of Day deviation charge
              Similarly ,For fifth sign change violation , charges = 5x20% of Day deviation charge

  • Summery of 5th DSM Amendment

  • Direction change 6 block to 12 block for the period up to 31.03.2020.
  • For Period from 01.04.2020 sustained deviation in one direction for 6 time blocks.After one year development.
  • Frequency changes 50.05 to 50.10   


Last modified: Thursday, 24 October 2019, 6:04 PM