Title: A novel operating strategy for unscheduled interchange price-based automatic generation control

Authors: V. Murali; K. Rama Sudha

Addresses: Department of Electrical and Electronics Engineering, Anil Neerukonda Institute of Technology and Sciences (A), Visakhapatnam – 531162, India ' Department of Electrical Engineering, A.U. College of Engineering (A), Visakhapatnam – 530003, India

Abstract: In order to maintain grid discipline and bring about more responsibility and accountability among the participants in the system, the availability-based tariff (ABT) mechanism was introduced in Indian power sector. Though there is a considerable improvement, it is further required to maintain the system with greater frequency stability and reduced fuel cost for power generation. This paper presents a control scheme for unscheduled interchange (UI) price-based automatic generation control (AGC) to nullify the deviations in frequency following a disturbance in the system. This scheme gives the system operator flexibility to schedule the generations in a desired manner on various units by which the merit order dispatch can be maintained. The proposed scheme is tested on a single area system with four generating units and is compared with an existing system and found effective. The results indicate that the frequency is maintained at normal value following a disturbance and the increased load can be shared among the generators in a desired manner.

Keywords: availability-based tariff; ABT; generation control error; GCE; marginal cost; merit order dispatch; unscheduled interchange price.

DOI: 10.1504/IJETP.2019.098960

International Journal of Energy Technology and Policy, 2019 Vol.15 No.2/3, pp.134 - 147

Available online: 04 Mar 2019 *

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