Ancillary services in Indian power system – Implementation challenges

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RRAS (reserve regulatory ancillary services), FGMO (free governor mode operation), AGC (automatic generation control), CERC (central electricity regulatory commission)


Reserve regulatory ancillary service (RRAS) was implemented on 12th April 2016 in Indian power system to empower the system operator to maintain the frequency in IEGC band, regulate line loadings, loss of generation or load, etc. This paper discusses the challenges in implementation of RRAS.


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How to Cite

Wadi, S. A., Verghese, S., Balaji, V., Suresh, V., & Anbunesan, G. (2022). Ancillary services in Indian power system – Implementation challenges. Indian Journal of Power and River Valley Development, 71(11&12), 173–175.
Received 2022-04-24
Accepted 2022-04-24
Published 2022-04-24



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Central Electricity Regulatory Commission (Ancillary Services Operations) Regulations, 2015,http://

Detailed Procedure For Ancillary Services Operations – NLDC, POSOCO

Staff Paper on Introduction of Ancillary Services to Indian Electricity Market : Central Energy Regulatory Commission, April 2013 whatsnew/SP13.pdf

Ancillary Services in India - Evolution, Implementation and Benefits : S.K. Soonee, K.V.S. Baba, S.S. Barpanda et al Oct. 2016

Ancillary Services Facilitating Large Scale Integration of Renewable Energy in India : K V S Baba, U K Verma, S S Barpanda, S C Saxena et al.