Voltage and frequency regulation of standalone self‐excited induction generator for micro‐hydro power generation using discrete‐time adaptive control

Scherer, Lucas Giuliani; Tambara, Rodrigo Varella; Camargo, Robinson Figueiredo de

doi:10.1049/iet-rpg.2015.0321

Cited by 55 publications

(18 citation statements)

References 17 publications

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“…The ELC control is based on the estimated PCC terminal voltage frequency, which is performed by a Kalman-based synchronisation method followed by a frequency identification algorithm [45]. The Kalman filter is well known due its ability to deal with linear systems corrupted by uncertainties in the states of the plant as well as measurement noise [46].…”

Section: Frequency Control and Synchronisation Methodsmentioning

confidence: 99%

Proportional‐resonant control applied on voltage regulation of standalone SEIG for micro‐hydro power generation

Tischer

Tibola

Scherer

et al. 2017

IET Renewable Power Generation

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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 microhydro turbine, (iii) a three-phase three-legs distribution static synchronous compensator (DSTATCOM) and (iv) linear and nonlinear 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.

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Section: Frequency Control and Synchronisation Methodsmentioning

confidence: 99%

Proportional‐resonant control applied on voltage regulation of standalone SEIG for micro‐hydro power generation

Tischer

Tibola

Scherer

et al. 2017

IET Renewable Power Generation

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“…Such voltage variation can influence the load side stability in direct interface configurations. Therefore, WECS integrates power electronics converters, at the load side, to regulate the load voltage and frequency and meet the requirements [5][6][7]. At the generator side of the WECS, the turbine-generator is required to operate at an optimum speed in order to extract maximum power from the wind.…”

Section: Introductionmentioning

confidence: 99%

Artificial Neural Network and Kalman Filter for Estimation and Control in Standalone Induction Generator Wind Energy DC Microgrid

Tanvir

Merabet

2020

Energies

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This paper presents an improved estimation strategy for the rotor flux, the rotor speed and the frequency required in the control scheme of a standalone wind energy conversion system based on self-excited three-phase squirrel-cage induction generator with battery storage. At the generator side control, the rotor flux is estimated using an adaptive Kalman filter, and the rotor speed is estimated based on an artificial neural network. This estimation technique enhances the robustness against parametric variations and uncertainties due to the adaptation mechanisms. A vector control scheme is used at the load side converter for controlling the load voltage with respect to amplitude and frequency. The frequency is estimated by a Kalman filter method. The estimation schemes require only voltage and current measurements. A power management system is developed to operate the battery storage in the DC-microgrid based on the wind generation. The control strategy operates under variable wind speed and variable load. The control, estimation and power management schemes are built in the MATLAB/Simulink and RT-LAB platforms and experimentally validated using the OPAL-RT real-time digital controller and a DC-microgrid experimental setup.

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“…Apart from internal and short circuit faults sudden load disconnection induces transients and vibrations severely which have been noticed in commissioned hydropower projects [11,12]. In addition, nowadays converter-fed synchronous machines (SMs) are also getting into practice for pumped-storage plants for its flexible connectivity with HVDC systems, in which the vibrations are expected to be even more severe because of its switching control technique [13,14]. Hence the vibrations have the vital impact on the reliability and durability of turbine generators and proper instrumentation has to be provided for condition monitoring [3,15,16].…”

Section: Introductionmentioning

confidence: 99%

Simulation and experimental illustration of vibration at load rejection in a continuously overloaded large hydrogenerator

Carounagarane

Chelliah

Sarma³

2020

IET Renewable Power Generation

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Large hydro generators are usually overloaded at various situations such as the period when excess water is available and when excess inflow is to be discharged. The period may have extended to many weeks under exigent conditions e.g. six weeks in case of a 1000 MW hydropower plant (HPP) located at northern region, India at 20% overload. All the performance related parameters including vibrations were observed during commissioning except runaway speed test at load rejection. At overloads, if there is a sudden load rejection the vibration transients will be even more severe due to drop in current and internal impedance. Hence this paper aims to analyze the vibration signature of large synchronous generator (SG) when operated at overloads and subjected to sudden load rejection. The substantiation of the factual model of 250 MW hydro generating units (HGU) replicating the case plant has been simulated using SIMSEN software. Apart from case report and simulative validation an experimental verification is also conducted with a prototype model of 2.2 kW SG. This paper provides the feasibility to operate the SG's 20% beyond its rated load as designed with proper maintenance and safety carried out by plant operators.

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Voltage and frequency regulation of standalone self‐excited induction generator for micro‐hydro power generation using discrete‐time adaptive control

Cited by 55 publications

References 17 publications

Proportional‐resonant control applied on voltage regulation of standalone SEIG for micro‐hydro power generation

Proportional‐resonant control applied on voltage regulation of standalone SEIG for micro‐hydro power generation

Artificial Neural Network and Kalman Filter for Estimation and Control in Standalone Induction Generator Wind Energy DC Microgrid

Simulation and experimental illustration of vibration at load rejection in a continuously overloaded large hydrogenerator

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