Analytical Model of Small Hydropower Plant Working at Variable Speed

Borkowski, Dariusz

doi:10.1109/tec.2018.2849573

Cited by 35 publications

(34 citation statements)

References 30 publications

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“…Fig. 2 illustrates the nonlinear turbine model described from (1) to (3). The hydraulic servo model can be described by…”

Section: A Hydraulic Turbinementioning

confidence: 99%

“…Given that the system (18) is an input-non-affine system, it is sufficient to employ PI-PBC 3 . Let x v define an admissible trajectory of the system (18).…”

Section: B Passivity-based Pi Controlmentioning

confidence: 99%

“…This system has a strong coupling between mechanical, hydraulic, and electrical dynamics which makes the system difficult to analyze [1], [2]. Moreover, it presents many different operating points, which also complicate the analysis [3]. These features make the design and control of this system challenging.…”

Section: Introductionmentioning

confidence: 99%

“…Most of these investigations analyze only one part of the system, for example, the hydraulic and/or mechanical dynamics without taking into account the electrical part. Recent investigations have demonstrated the advantages of including power electronic devices into the energy conversion system to improve efficiency by allowing variable speed [3]. In [19] and [20], a model SHP connected to the ac grid using a permanent magnet synchronous generator (PMSG), diode bridge rectifier, boost converter and voltage source converter (VSC) was studied.…”

Section: Introductionmentioning

confidence: 99%

“…This configuration was also used in wind power applications in [21], [22]. The model proposed in [20] was improved in [3] and presented a detailed analysis where high efficiency was achieved by reducing the electrical power losses. In [23], a multilevel hierarchical structure based on a PI controller was proposed; however, in that work, hydraulic dynamics were not considered.…”

Section: Introductionmentioning

confidence: 99%

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Passivity-Based Control for Small Hydro-Power Generation With PMSG and VSC

2020

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This paper presents a passivity-based control method for a small hydro-power system that consists of a permanent magnet synchronous generator (PSMG) connected to the grid through a back-toback converter. Nonlinear models of the hydraulic, mechanical, and electrical parts of the small hydro-power system are considered. Two approaches in the realm of passivity-based control are implemented, namely, standard passivity-based control and PI-passive. These controls consider the intrinsic characteristics of the model, which has a port-Hamiltonian (pH) structure with a small hydro-power system in open-loop. The purpose is to design a control law with passive output which ensures asymptotic stability for closed-loop operation in the sense of Lyapunov's theory. The paper is practically oriented, and hence, the proposed controllers are tested and compared with a conventional approach, in a 13.2 kV distribution feeder. The proposed controllers have been assessed and compared with a classical PI controller considering steady state and transient behaviors in small hydro-power plants (SHPs). Simulation results show that the proposed methodology guarantees stability and offers better dynamical performance. INDEX TERMS Small hydro-power, permanent magnet synchronous generation (PMSG), energy conversion power systems, passivity, back-to-back converter.

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“…Fig. 2 illustrates the nonlinear turbine model described from (1) to (3). The hydraulic servo model can be described by…”

Section: A Hydraulic Turbinementioning

confidence: 99%

“…Given that the system (18) is an input-non-affine system, it is sufficient to employ PI-PBC 3 . Let x v define an admissible trajectory of the system (18).…”

Section: B Passivity-based Pi Controlmentioning

confidence: 99%