Abstract
A new technique for designing power-system stabilisers for a power plant with identical generators is proposed. By exploring the special structure of the system and using modal techniques, two different transfer functions of the plant connected with the external power system are constructed by using reduced-order models. These transfer functions are used in a frequency domain procedure for determination of the time constants and gains of the stabilisers. For comparison, a conventional decentralised signal and a summation of similar signals from the generators are applied to the stabilisers to control the local modes. Based on the conventional frequency domain technique for designing a stabiliser for a single machine, the proposed technique explains statements from other papers, and produces new important results.
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