Voltage and frequency response of small hydro power plant in grid connected and islanded mode

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Maina, DK
Sanjari, MJ
Nair, NKC
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2018
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Hydro-based power is gaining more interests as the penetration level of small-scale hydro power plants are being increased to the medium voltage network. This paper investigates the performance of a single unit small hydropower plant in both grid-connected and islanded operation. The overexcitation and volt/hertz excitation limiters have been included in the study to compare their responses in both modes of operation. The plant is evaluated under different loading scenarios considering both resistive and inductive loads. A PI tertiary control for speed reference setting in islanded operation is introduced in the governor to enable regaining of 50 Hz frequency after load changes. The results obtained from the simulation study show the importance and difference of analysing different loading scenarios both in grid-connected and island modes. Also, the inclusion of PI control in governor aids in returning the frequency to its nominal value.

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Australasian Universities Power Engineering Conference, AUPEC 2018
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© 2018 IEEE. Personal use of this material is permitted. Permission from IEEE must be obtained for all other uses, in any current or future media, including reprinting/republishing this material for advertising or promotional purposes, creating new collective works, for resale or redistribution to servers or lists, or reuse of any copyrighted component of this work in other works.
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Electrical engineering
Electronics, sensors and digital hardware
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Maina, DK; Sanjari, MJ; Nair, NKC, Voltage and frequency response of small hydro power plant in grid connected and islanded mode, Australasian Universities Power Engineering Conference, AUPEC 2018, 2018