Induction generators for stand-alone micro-hydro systems

Smith, Nigel

doi:10.1109/pedes.1996.535860

Cited by 51 publications

(19 citation statements)

References 7 publications

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“…For this design, a basin diameter of 2000 mm was chosen with a canal width of 1000 mm, and the predicted maximum operating efficiency speed is 95 rpm. To maintain a constant rotational speed at the maximum output power point, and ensure an AC output of 50 Hz / 230 V, an electronic load controller (ELC) is used [2].…”

Section: Implementation Testing Of Gravitational Water Vortex Pomentioning

confidence: 99%

“…Micro hydropower plants are small scale hydropower plants whose capacity ranging from 5 kW to 100 kW [1], with pico hydropower considered to be below 5 kW capacity [2]. Generally, micro hydropower systems do not need large dams or reservoirs, water from a river is partially diverted through an intake canal to a forebay tank, and then fed via penstock to a lower elevation.…”

Section: Introductionmentioning

confidence: 99%

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Technical and economic prospects for the site implementation of a gravitational water vortex power plant in Nepal

Dhakal

Nepal

Acharya

et al. 2016

2016 IEEE International Conference on Renewable Energy Research and Applications (ICRERA)

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Section: Implementation Testing Of Gravitational Water Vortex Pomentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Technical and economic prospects for the site implementation of a gravitational water vortex power plant in Nepal

Dhakal

Nepal

Acharya

et al. 2016

2016 IEEE International Conference on Renewable Energy Research and Applications (ICRERA)

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“…The hydro sources i.e. mini-hydro (100kW to 1MW), micro-hydro (10kw to 100kW) and pico-hydro (less than 10kW) these are suitable for the off grid operation [2]- [4].…”

Section: Introductionmentioning

confidence: 99%

Analysis Of Ac Voltage Controller Based Electronic Load Controller For Self-Excited Induction Generator

2017

IJERAT

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“…It has been shown to be a cost effective method of off-grid electricity generation, especially in hilly and mountainous regions [1]. A standard pico-hydro system is a stand-alone unit, comprising a turbine driving a generator, a shunt controller, known as an electronic load controller (ELC) regulating either the voltage or frequency output, and a low-voltage distribution system with consumer loads, such as lighting, mobile phone chargers and radios [2,3]. The turbine is designed to operate at a constant speed to generate the grid frequency; the ELC maintaining a constant load on generator.…”

Section: Introductionmentioning

confidence: 99%

A controller for single-phase parallel inverters in a variable-head pico-hydropower off-grid network

Williamson

Griffo

Stark

et al. 2016

Sustainable Energy, Grids and Networks

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The majority of off-grid pico-hydropower systems use a single turbine and generator, connected directly to an AC network resulting in clusters of isolated, power-limited, single failure-prone networks. The use of inverters has been previously proposed in order to decouple the turbine's rotational speed from the network frequency in these remote microgrids. This facilitates the use of multiple generators and the creation of expandable, reliable networks with redundancy. This paper presents an inverter controller for this situation, and addresses a combination of challenges that is specific to expandable pico-hydropower networks in geographically dispersed remote communities. Multiple variable-head turbines are connected to a network, whose individual local hydraulic heads vary due to flow changes over the seasons, and the network has no single generator that dominates and no master controller, but instead identical independent controllers that do not communicate. The controller presented here uses an output voltage and frequency droop controller, with inner synchronous reference frame control loops for the fundamental voltage and current. The control coefficients are automatically adjusted to the available local hydraulic head. Simulation and experimental results show that the power is shared amongst generators, proportionally to the locally available power, in steady and dynamic situations. Harmonic compensation loops are proposed: these reduce the output total harmonic distortion (THD) of a single inverter from 9.53% to 1.45% for a non-linear load. Geographically distributed operation in resistive networks is investigated, and the results show that the controller achieves plug-and-play capability for remote off-grid networks with multiple and different pico-hydropower generators.

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Induction generators for stand-alone micro-hydro systems

Cited by 51 publications

References 7 publications

Technical and economic prospects for the site implementation of a gravitational water vortex power plant in Nepal

Technical and economic prospects for the site implementation of a gravitational water vortex power plant in Nepal

Analysis Of Ac Voltage Controller Based Electronic Load Controller For Self-Excited Induction Generator

A controller for single-phase parallel inverters in a variable-head pico-hydropower off-grid network

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