Isolated induction generator in a rural Brazilian area: Field performance tests

Braga, Alexandre Viana; Rezek, Angelo José Junqueira; Silva, V.F.; Viana, Augusto Nelson Carvalho; Bortoni, Edson C.; Sanchez, W.D.C.; Ribeiro, Paulo F.

doi:10.1016/j.renene.2015.05.057

Cited by 14 publications

(5 citation statements)

References 5 publications

(4 reference statements)

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“…A PAT technology was tested with a laboratory prototype for a case study of an aqueduct in the city of Merano, Italy [14]- [15], in which the authors concluded to be possible to obtain 76% of the maximum efficiency of the turbine working in both reverse and direct mode. A pumping system of a micro-hydroelectric power plant in a rural farm in Brazil was designed with a turbine capable of performing both direct and inverse (PAT) modes coupled to a standalone isolated induction generator, considering a uniform rotational speed [16]. [12] started to analyze the global efficiency of the PATs in a laboratory prototype system.…”

Section: Introductionmentioning

confidence: 99%

Optimal energy efficiency of isolated PAT systems by SEIG excitation tuning

Fernandes

Sánchez

Silva

et al. 2019

Energy Conversion and Management

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The use of pump working as turbine (PAT) was identified by many researchers as a way to improve the energy efficiency in the water systems. However, the majority of the researches consider the hydraulic machine connected to the electrical grid, which may not fit best when these recovery systems are located in rural or remote areas. To improve the efficiency in these recovery systems for rural areas, this research contributes for a further study and optimization of the off-grid PAT systems with induction generators. The current manuscript proposes a methodology to obtain the best efficiency of the PAT-SEIG (Self-Excited Induction Generator) system when operating under different speeds and loads. For these systems, the selection of capacitors for the SEIG is critical to maximizing the energy efficiency. A methodology is proposed to estimate and select the correct SEIG model parameters and, thus, compute the best capacitor values to improve the PAT-SEIG energy efficiency. Special attention is given to the impact the SEIG parameters have in the efficiency of the recovery system. The accuracy of the analytical model improved, reducing the error between analytical and experimental results from 50.8% (for a model with constant parameters) to 13.2% (with parameters changing according to the operating point of the system). These results showed an increase of the overall PAT system efficiency from 26% to 40% for the analyzed case study.

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Section: Introductionmentioning

confidence: 99%

Optimal energy efficiency of isolated PAT systems by SEIG excitation tuning

Fernandes

Sánchez

Silva

et al. 2019

Energy Conversion and Management

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show abstract

“…This circuit topology and its control scheme are complicated and unsuitable for low-power applications. A thyristor-based SVG can be adopted instead of the VSC-based SVG [23,36]. However, the SEIG current harmonics and large DC bus voltage 𝑣 𝐷 still cause a low system efficiency.…”

Section: Assesment Of Possible Power Conversion Topologiesmentioning

confidence: 99%

Grid Integration of Livestock Biogas Using Self-Excited Induction Generator and Spark-Ignition Engine

Trairat,

Somkun,

Kaewchum

et al. 2023

Energies

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This study developed a grid-connected biogas power generation system for a rural community using a 3-phase 2.2 kW squirrel-cage induction machine as the self-excited induction generator. The generator was driven by a 196 cc single-cylinder spark-ignition engine fueled by biogas. We developed a back-to-back converter that consists of a 3-phase PWM rectifier as the generator-side converter and a single-phase LCL-filtered grid-connected inverter. The generator-side converter transferred the active power to the grid-side converter and supplied the reactive power control back to the generator. The notch filter-based bus voltage control on the generator side mitigated the inter-harmonics in the generator current. The injected grid current complied with the IEEE 1547 standard because of the multi-frequency unbalanced synchronous reference frame control. The proposed system was validated with biogas produced from pig manure at a pig farm in central Thailand, which found a maximum output of 1.2 kW with a thermal system efficiency of 10.7%. The proposed system was scheduled to operate at 1.2 kW for 8 h per day with a levelized cost of 0.07 US$/kWh, 42% cheaper than the retail electricity price, and a payback period of 2.76 years. The proposed system is suitable for a farm with a minimum of 34 pigs.

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“…Small capacity IGs exhibit low reactance-to-resistance ratio and low mechanical inertia, and they present a weak source before the load. Moreover, when a weak grid caters to perturbing loads, issues such as voltage sag/swell, harmonics, unregulated frequency, and voltage collapse pose problems for power supply [5]. Investigations reported so far address only a few of the aforementioned issues, namely, the voltage regulation and harmonic compensation of self-excited induction generators (SEIGs) by employing pulse-width modulation (PWM) rectifiers and static synchronous compensator (STATCOM) [6].…”

Section: Introductionmentioning

confidence: 99%

Fault Immune Pico-Hydro Powered Base Station of Remote Telecommunication Tower

Verma¹,

Pant²,

Singh³

2016

Journal of Power Electronics

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This paper presents the dynamic excitation control of a siphon-turbine coupled pico-hydro powered cage rotor induction generator and load matching for off-grid electricity generation. Through the proposed dual-role of the current-controlled voltage source converter (VSC), acting as static synchronous compensator and load controller, real and reactive power are dynamically controlled in a decoupled manner with a self supported DC-bus. The proposed scheme entails minimal computation for ensuring the rated (set) capacity of real power. The scheme also exhibits fault immunity for protection, thus enabling the effective handling of constant power electrical loads presented by base telecom station towers in remote locations. The performance of the system is evaluated under MATLAB/Simulink and is experimented through a developed hardware prototype. Simulation and experimental results show close conformity and validate the effectiveness of the proposed scheme.

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Isolated induction generator in a rural Brazilian area: Field performance tests

Cited by 14 publications

References 5 publications

Optimal energy efficiency of isolated PAT systems by SEIG excitation tuning

Optimal energy efficiency of isolated PAT systems by SEIG excitation tuning

Grid Integration of Livestock Biogas Using Self-Excited Induction Generator and Spark-Ignition Engine

Fault Immune Pico-Hydro Powered Base Station of Remote Telecommunication Tower

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