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access icon free Proportional-resonant control applied on voltage regulation of standalone SEIG for micro-hydro power generation

© The Institution of Engineering and Technology
Received 10/10/2016, Accepted 17/01/2017, Revised 28/12/2016, Published 20/01/2017

This study deals with the development of a proportional-resonant (PR) control applied on voltage regulation and harmonics compensation of a standalone self-excited induction generator (SEIG) for micro-hydro power generation system. The generation system considers: (i) a three-phase induction generator (IG) as SEIG, (ii) which is driven by an unregulated micro-hydro turbine, (iii) a three-phase three-legs distribution static synchronous compensator (DSTATCOM) and (iv) linear and non-linear loads connected to the AC bus. The voltage regulation is performed through the injection of reactive power to the AC bus through the DSTATCOM, providing excitation current to the IG. It is considered the employment of PR control techniques, which offers suitable voltage regulation through voltage harmonics compensation in the point of common coupling. Furthermore, frequency regulation is performed on the demand side by an electronic load control connected to the DC bus of the DSTATCOM. Experimental results were obtained to demonstrate the good performance of the voltage and frequency regulation, provided by the control system during transients of linear and non-linear loads.

Inspec keywords: voltage control; hydraulic turbines; power system harmonics; reactive power; asynchronous generators; distributed power generation; frequency control; hydroelectric power stations; load regulation; static VAr compensators; power generation control

Other keywords: AC bus; DC bus; PR control; frequency regulation; nonlinear loads; standalone SEIG; three-phase induction generator; proportional-resonant control; reactive power; unregulated microhydro turbine; standalone self-excited induction generator; microhydro power generation system; voltage regulation; electronic load control; DSTATCOM; three-phase three-legs distribution static synchronous compensator; point of common coupling; voltage harmonics compensation; linear loads; excitation current

Subjects: Power supply quality and harmonics; Voltage control; Asynchronous machines; Power system control; Hydroelectric power stations and plants; Other power apparatus and electric machines; Control of electric power systems; Frequency control; Distributed power generation

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