Squirrel cage induction generator to 140 bus weak distribution power grid connection using i-UPQC for voltage fluctuations

Purpose The power electronic converter is used for the satisfaction of reactive power demand of induction generator, when grid-tied. This paper aims to present an application of STATCOM to reduce inrush transient caused by the connection of a squirrel-cage induction generator (SCIG) to the grid. Design/methodology/approach The power generation system consists of an uncontrolled prime mover, a SCIG and a power electronic converter connected to the grid. The three-phase Neutral Point Clamped (NPC) converter works as a STATCOM to satisfy a reactive power demand of the generator. A control scheme of STATCOM uses the x-y reference frame rotating synchronously with grid voltage vector and the p-q instantaneous power theory to calculate q component of grid power. Findings It is shown that the parallel converter, which works as a reactive power compensator allows decreasing transients during a grid connection of the induction generator. Research limitations/implications Transients during a grid connection of the induction generator are only partially decreased. Practical implications It is needed to compensate for the reactive power of a SCIG. The NPC converter works as a STATCOM. The converter partially reduces grid transients during generator connection. The laboratory tests are demonstrated by connection 7.5 kW induction generator to 8 kVA transformer. Originality/value The paper presents the mitigation of grid transients during connection of induction generator with the power electronic converter working as reactive power compensator.

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Performance assessment of distinct configurations for squirrel cage induction generator based wind energy conversion systems

10.1063/5.0043408 ◽

2021 ◽

Author(s):

Hemant Ahuja ◽

Arika Singh ◽

Vikas Singh Bhadoria ◽

Sachin Singh

Keyword(s):

Wind Energy ◽

Energy Conversion ◽

Performance Assessment ◽

Induction Generator ◽

Wind Energy Conversion ◽

Wind Energy Conversion Systems ◽

Squirrel Cage ◽

Energy Conversion Systems ◽

Squirrel Cage Induction Generator

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The Analytical Simulation of Squirrel Cage Induction Generator-Rectifier System Based on SPWM

Applied Mechanics and Materials ◽

10.4028/www.scientific.net/amm.740.347 ◽

2015 ◽

Vol 740 ◽

pp. 347-350

Author(s):

Ying Jia ◽

Jian Xin Hu ◽

Meng Wu

Keyword(s):

Input Power ◽

Induction Generator ◽

Switching Function ◽

Dc Voltage ◽

Squirrel Cage ◽

Analytical Simulation ◽

Wind Power System ◽

Full Power ◽

Squirrel Cage Induction Generator ◽

Switching State

In the full power wind power system, the cage induction wind generator-rectifier system can be regarded as a independent part if the DC voltage could be always controlled constant by inverter part. The prospective AC voltage and frequency of induction generator is dependent on the specific speed and input power, which is obtained by use of SPWM. All rectifier switching state and the alternating moments can be calculated by switching function given by SPWM control. This paper focuses on how to use analytical methods to calculate the process of alternately switching the state of the system. Furthermore, the dynamic mathematical model of induction generator is studied and derived under different states, which is suitable for analytical method on base of Laplace transform.

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