A new variable speed constant voltage controller for self-excited induction generator

Wekhande, Shashank; Agarwal, Vivek

doi:10.1016/s0378-7796(01)00157-2

Cited by 19 publications

(8 citation statements)

References 7 publications

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“…[2][3][4][5] 1) Grid Connected Mode: In this mode, the induction machine is connected with the power supply line and machine is made to run above the synchronous speed by prime mover. The active power will be transfer to the grid but machine will draw reactive power for magnetizing from the grid.…”

Section: B Self-excited Induction Generator(seig)mentioning

confidence: 99%

“…This test is performed to determine the short-circuit current Isc with normal applied voltage to stator; power factor on short-circuit; total equivalent resistance and reactance of the motor as referred to stator side [3][4][5][6]. Synchronous Running Test: The induction motor is made to run at no load at rated voltage and frequency at synchronous speed with help of prime mover.…”

Section: E Tests Performed On Seigmentioning

confidence: 99%

“…Synchronous Running Test: The induction motor is made to run at no load at rated voltage and frequency at synchronous speed with help of prime mover. This test is used to determine the magnetizing characteristics and shunt branch parameters [3][4][5][6].…”

Section: E Tests Performed On Seigmentioning

confidence: 99%

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Steady-State Analysis of Three-Phase Self-Excited Induction Generator for Stand-Alone Applications

Singh¹

2018

IJRASET

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Self-excited induction generator offers certain advantages over a conventional synchronous generator as a source of isolated power supply. Main advantages are reduced cost, less maintenance, self protection from short-circuit or overload condition, and brush less rotor. It is used as variable speed generator for different applications such as wind energy conversion, micro hydropower generation. Therefore, it is now a key interest to develop an efficient and viable Generator for harnessing the energy from renewable sources. To develop an efficient, viable, economic and controllable induction generator, we must know the steady-state performance of the generator. Using steady state equivalent circuit model excluding iron losses, steady state performance analysis has been done. Experimental investigations under steady state condition have been done in the laboratory. Keywords: Minimum capacitance, standalone SEIG, self-excited induction generator, remote areas, rural areas, steady state analysis, operating conditions. I.INTRODUCTION Electrical energy is the basic necessity of any country for its overall development. Fossil fuels (Coal, Oil, and Diesel) are the main sources of electrical energy (about 60% in our country). Fast depletion of fossil fuels results insecurity of availability of fossil fuels, subsequent increase in energy cost, the environmental pollution and above all the global warming. This has brought the worldwide attention in reducing the pollution and conservation of the limited conventional fuels by encouraging more and more use of the energy available from the non-conventional/renewable sources such as the wind, the biogas, the tidal waves and the small hydro power stations on the running canals and rivulets etc. The potential of the energy available from the small hydro and the wind sources seems to be quite promising to meet the future energy demands, especially in the remote and isolated areas. However, these systems will become more viable if their cost is reduced to the minimum. Therefore, the squirrel cage rotor induction generators are receiving much attention for such applications due to its low cost and robust construction[1-4]. The Self-Excited Induction Generators (SEIGs) are receiving increased attention from the utilities over the world to obtain the energy from renewable/non-conventional sources for remote and isolated areas. The main problems in the use of induction machine as a generator are related to the varying voltage and frequency, the loss of self-excitation, the overloading of the machine, the transient over voltages due to the capacitance switching or the load loss. But, the robust construction of induction machine specially squirrel cage type rotor, offers maintenance free operation and the least cost of the generating system. This has motivated to facilitate the use of the induction generator in isolated mode with suitable low cost control which could ensure the reliable supply of good quality. Also, such system for power generation could be made efficient and c...

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Section: B Self-excited Induction Generator(seig)mentioning

confidence: 99%

Section: E Tests Performed On Seigmentioning

confidence: 99%

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Steady-State Analysis of Three-Phase Self-Excited Induction Generator for Stand-Alone Applications

Singh¹

2018

IJRASET

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“…A great deal of research has been conducted into SEIG operation and control; this includes the characteristics of the operation of SEIG in islanded mode. The generators lose connection to the electricity supply grid, as studied in [16][17][18], while selection of the capacitance reactive sources has been studied in [19][20][21] for fixed capacitance, and in [22,23] for reactive compensator. Other research has focused on the control of ballast loads connected to the induction generator in order to compensate for variation of consumer loads [24][25][26].…”

Section: Introductionmentioning

confidence: 99%

Power Management of Islanded Self-Excited Induction Generator Reinforced by Energy Storage Systems

Nasser

Farrag

2018

Energies

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Self-Excited Induction Generators (SEIGs), e.g., Small-Scale Embedded wind generation, are increasingly used in electricity distribution networks. The operational stability of stand-alone SEIG is constrained by the local load conditions: stability can be achieved by maintaining the load's active and reactive power at optimal values. Changes in power demand are dependent on customers' requirements, and any deviation from the pre-calculated optimum setting will affect a machine's operating voltage and frequency. This paper presents an investigation of the operation of the SEIG in islanding mode of operation under different load conditions, with the aid of batteries as an energy storage source. In this research a current-controlled voltage-source converter is proposed to regulate the power exchange between a direct current (DC) energy storage source and an alternating current (AC) grid, the converter's controller is driven by any variation between machine capability and load demand. In order to prolong the system stability when the battery reaches its operation constraints, it is recommended that an ancillary generator and a dummy local load be embedded in the system. The results show the robustness and operability of the proposed system in the islanding mode of the SEIG under different load conditions.

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“…The second area is the selection of the capacitance required for self-excitation and build up of the machine terminal voltage. This has been addressed for two different topologies; a fixed capacitor connected in shunt or in series with the machine stator winding [8][9][10] or a reactive power compensator connected across the machine terminals [11,12]. The reactive power is controlled to support the machine terminal voltage against load variations.…”

Section: Introductionmentioning

confidence: 99%

Analysis of the Dynamic Performance of Self-Excited Induction Generators Employed in Renewable Energy Generation

Farrag

Putrus

2014

Energies

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Incentives, such as the Feed-in-tariff are expected to lead to continuous increase in the deployment of Small Scale Embedded Generation (SSEG) in the distribution network. Self-Excited Induction Generators (SEIG) represent a significant segment of potential SSEG. The quality of SEIG output voltage magnitude and frequency is investigated in this paper to support the SEIG operation for different network operating conditions. The dynamic behaviour of the SEIG resulting from disconnection, reconnection from/to the grid and potential operation in islanding mode is studied in detail. The local load and reactive power supply are the key factors that determine the SEIG performance, as they have significant influence on the voltage and frequency change after disconnection from the grid. Hence, the aim of this work is to identify the optimum combination of the reactive power supply (essential for self excitation of the SEIG) and the active load (essential for balancing power generation and demand). This is required in order to support the SEIG operation after disconnection from the grid, during islanding and reconnection to the grid. The results show that the generator voltage and speed (frequency) can be controlled and maintained within the statuary limits. This will enable safe disconnection and reconnection of the SEIG from/to the grid and makes it easier to operate in islanding mode.

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A new variable speed constant voltage controller for self-excited induction generator

Cited by 19 publications

References 7 publications

Steady-State Analysis of Three-Phase Self-Excited Induction Generator for Stand-Alone Applications

Steady-State Analysis of Three-Phase Self-Excited Induction Generator for Stand-Alone Applications

Power Management of Islanded Self-Excited Induction Generator Reinforced by Energy Storage Systems

Analysis of the Dynamic Performance of Self-Excited Induction Generators Employed in Renewable Energy Generation

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