Stand-alone micro-hydro power plant with induction generator supplying single phase loads

Ion, Catalin Petrea; Marinescu, C.

doi:10.1063/1.4780167

Cited by 11 publications

(5 citation statements)

References 26 publications

(20 reference statements)

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“…This extends the ability of control design. Most of the mentioned state-based LFC controllers of micro hydro power plants [1,2,[6][7][8][9][10][11][12][13]19] usually have an assumption that all the system states are measurable. The assumption is too strict to be achieved in practice.…”

Section: Model Analysis and Order Reductionmentioning

confidence: 99%

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Load Frequency Control for Micro Hydro Power Plants by Sliding Mode and Model Order Reduction

Qian

Liu

2015

Automatika

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Original scientific paperMicro hydro is treated as a major renewable energy resource. Such a kind of plants blooms because they can evade some dilemmas like population displacement and environmental problems. But their performance on the frequency index of power systems may be deteriorated in the presence of sudden small load perturbations and parameter uncertainties. To improve the performance, the problem of load frequency control (LFC) raises up. Design of state-based controllers on the aspect of modern control is challenging because only a part of the system states are measurable. This paper addresses the scheme of sliding mode control by model order reduction for the LFC problem of micro hydro power plants. The kind of plants usually has two operating modes, i.e., isolated mode and grid-connected mode. Under each operating mode, mathematical model and model reduction are investigated at first. According to the reduced-order model, a sliding mode control law is subsequently derived. Since the control law is applied to the original system, a sufficient condition about the system stability is proven in light of small gain theory. Simulation results illustrate the feasibility, validity and robustness of the presented scheme. Key words: Load Frequency Control, Micro Hydro Power Plants, Model Order Reduction, Sliding Mode ControlUpravljanje frekvencijom i radnom snagom mikro hidroelektrana kliznim režimom rada i redukcijom reda modela sustava. Mikro hidroelektrane smatraju se jednim od glavnih obnovljivih izvora energije. Ovakve elektrane su poglavito zanimljive pošto izbjegavaju dileme vezane za iseljavanje ljudi i utjecaj na okoliš. Međutim, njihov učinak na indeks frekvencije energetskih sustava može biti negativan zbog naglih manjih promijena u opterećenju i nesigurnosti parametara. Kako bi se unaprijedila učinkovitost, javlja se problem regulacije frekvencije i radne snage. Projektiranje regulatora po varijablama stanja sustava izazovan je problem, jer je mjerljiv samo dio stanja sustava. Ovajčlanak analizira problem upravljanja kliznim režimom rada reducirajući red modela sustava kod regulacije frekvencije i radne snage mikro hidroelektrana. Ovakve elektrane mogu raditi u samostalnom režimu rada ili biti spojene na distribucijsku mrežu. Za oba ražima rada prvo se istražuju matematički modeli te potom njihova redukcija. S obzirom na model reduciranog reda izvodi se upravljački zakon kliznog režima rada. Pošto se zakon upravljanja primjenjuje na izvorni sustav, dokazan je dovoljan uvjet za stabilnost u vidu teorije malog pojačanja. Simulacijski rezutati pokazuju izvedivost, ispravnost i robustnost predloženog pristupa.Ključne riječi: upravljanje frekvencijom i radnom snagom, mikro hidroelektrane, redukcija reda modela sustava, upravljanje u kliznog režimu rada

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Section: Model Analysis and Order Reductionmentioning

confidence: 99%

“…Operation of micro hydro power plants is flexible and is deployed in different environments. Usually, there are two operating modes in these plants, i.e., isolated mode and grid-connected mode [1]. Under either mode, consumers fed by micro hydro power plants require continuous supply of power with good quality.…”

Section: Introductionmentioning

confidence: 99%

Load Frequency Control for Micro Hydro Power Plants by Sliding Mode and Model Order Reduction

Qian

Liu

2015

Automatika

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“…A more detailed presentation of the control system can be found on a previous author's research [22]. Based on the results obtained there, up to loading of 85%, the generator and its control algorithm manage to ensure constant voltage and frequency.…”

Section: System Configurationmentioning

confidence: 99%

Stability limits of a three-phase induction generator supplying single-phase loads

Ion

Marinescu

2013

2013 8th International Symposium on Advanced Topics in Electrical Engineering (Atee)

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This paper analyzes the stability limits of an autonomous three-phase induction generator supplying singlephase loads. By using a particular balancing algorithm, varying resistive and resistive-inductive loads are successfully supplied up to a threshold of 85% from the generator power in threephase mode. As the load active power is increased beyond this limit, the voltage tends to decrease. Experiments are carried out in order to establish the overall system behavior when loaded to full load. They show that it is possible to supply the loads beyond the 85% limit.

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“…For off-grid or stand-alone low power generation based upon MHP unit, the induction generator (IG) is considered more suitable than the synchronous one (Ion and Marinescu, 2013a;Ion and Marinescu, 2013b;Ion and Marinescu, 2012) because of its advantages like low price, robustness, reduced size, simple starting and synchronization, low maintenance, good response to faults and overloads and no need of external DC power supply when capacitors are used for excitation (Ion and Marinescu, 2011;Raza et al, 2013). However, for the low power range of few kW, induction machines are not manufactured specifically to operate as generators thus, series induction motors are employed as generators (Smith, 2008;Ion and Marinescu, 2013c).…”

Section: Introductionmentioning

confidence: 99%

Modeling and Analysis of the Dynamic Response of an Off-Grid Synchronous Generator Driven Micro Hydro Power System

Ali

Farooq

Rasool³

et al. 2021

IJRED

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This paper models and analyses the dynamic response of a synchronous generator driven off-grid micro hydro power system using Simulink tool of MATLAB software. The results are assessed from various perspectives including regulation through no load to full load and overload scenarios under normal and abnormal operating conditions. The investigation under the normal conditions of no load, linearly changing load and full load divulges that the system operates in a satisfactory manner as generator voltage and frequency remain approximately constant at 1 pu. However, at full load generator voltage and frequency drop 3% and 0.5% respectively from its nominal values but remain within prescribed standard IEC limits. The results also expose that the abnormal conditions produced by abrupt changes in load, system faults and severe overload, cause the unwonted variations in the magnitude of generator parameters. Moreover, the study reveals that the system stability significantly enhances when the system is run at full load because the regulation time to fix the variations in the generator parameters; except input mechanical power; decreases, e.g. from 4.1 sec to 0.8 sec for generator voltage, with the increase in the loading from quarter to full load respectively at unity power factor. Further, it is also observed that the regulation time rises, e.g. from 0.8 sec to 1.3 sec for generator voltage, with the reduction in load power factor from unity to 0.8, respectively. Thus, proper protection, to cater for increased fault current at full load and power factor correction must be provided to improve the system stability and protection. Furthermore, it is also concluded that the over loading in any case should be strongly avoided in this type of system and it should never be allowed to exceed 20% of the full load value to avoid system failure

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Stand-alone micro-hydro power plant with induction generator supplying single phase loads

Cited by 11 publications

References 26 publications

Load Frequency Control for Micro Hydro Power Plants by Sliding Mode and Model Order Reduction

Load Frequency Control for Micro Hydro Power Plants by Sliding Mode and Model Order Reduction

Stability limits of a three-phase induction generator supplying single-phase loads

Modeling and Analysis of the Dynamic Response of an Off-Grid Synchronous Generator Driven Micro Hydro Power System

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