Voltage Control of Single-Phase Two Winding Self Excited Induction Generator Using SVC-MERS for Isolated System

2016 ◽  
Vol 7 (3) ◽  
pp. 901
Author(s):  
Fransisco Danang Wijaya ◽  
Hartanto Prabowo
Keyword(s):  
Single Phase ◽  
Reactive Power ◽  
Voltage Regulation ◽  
Induction Generator ◽  
Prime Mover ◽  
Small Power ◽  
Load Variations ◽  
Three Phase ◽  
Generator Voltage ◽  
Effective Cost

Single-phase induction generator is very suitable to be used in the typical loads which only need a single-phase power supply with small power capacity requirement, such as diesel engine, picohydro or small wind plant. It has some advantages such as rugged, effective cost, maintenance free and require no external excitation. However, it has inductive characteristic which makes poor voltage regulation. This paper proposed a shunt reactive compensator called SVC-MERS which can provide a variable reactive power to maintain the generator voltage despite of load variations. The experiment was conducted on single-phase two winding induction generator coupled by a three-phase induction motor which serves as the prime mover. SVC-MERS and the load are connected in shunt to the main winding, while the excitation capacitor was connected to the auxiliary winding. The experimental results showed that SVC-MERS can improve voltage regulation and substantially enhanced steady state loading limit.

scholarly journals An electronic solution for the direct connection of a three-phase induction generator to a single-phase feeder

2009 ◽  
Vol 20 (3) ◽  
pp. 417-426 ◽  
Author(s):  
Ricardo Q. Machado ◽  
Amílcar F. Q. Gonçalves ◽  
Simone Buso ◽  
José A. Pomilio
Keyword(s):  
Power Quality ◽  
Power Flow ◽  
Power Plants ◽  
Single Phase ◽  
Reactive Power ◽  
Induction Generator ◽  
Direct Connection ◽  
Hydro Power ◽  
Pwm Inverter ◽  
Three Phase

This paper proposes a solution for the direct connection of a three-phase induction generator to a single-phase feeder. This high power quality system is intended to be used in micro-hydro power plants applications with control of the water flow. It is employed to maintain the speed of the induction generator greater than its synchronous value. The difference between the generated power and the power consumed by the local load flows through the single-phase feeder. The power flow control is provided by a three-phase PWM inverter that additionally guarantees the local power quality. A system with good power quality must have sinusoidal and constant amplitude voltages, fixed frequency operation, balanced induction generator voltages and currents, harmonics and reactive power compensation. The paper describes the inverter control strategy, presents design criteria of the controllers, and shows experimental results.

scholarly journals Simplified Approach for the Analysis of Three-Phase Self-Excited Induction Generator

10.29007/cddt ◽  
2018 ◽  
Author(s):  
Nidhish Mishra ◽  
Abdulsalam Shaikh
Keyword(s):  
Reactive Power ◽  
Practical Importance ◽  
Voltage Regulation ◽  
Operational Performance ◽  
Induction Generator ◽  
Simplified Approach ◽  
Three Phase

This paper presents a simplified approach to analyse the operational performance of a three phase Self-Excited Induction Generator (Cage type) under varying magnetizing component. SEIG are widely used in wind- mills due to many advantages, such as robustness, mechanical simplicity and low price but suffers from poor voltage regulation. However, the need of external capacitance to provide required reactive power is a major limitation particularly in standalone mode [1, 2] Therefore, it is necessary to study the effect of capacitance very precisely for practical importance. The proposed method is experimentally tested for a 3.7 kW induction generator.

scholarly journals A New Grid-Connected Constant Frequency Three-Phase Induction Generator System under Unbalanced-Voltage Conditions

Electronics ◽  
2021 ◽  
Vol 10 (8) ◽  
pp. 938
Author(s):  
Mohammadreza Moradian ◽  
Jafar Soltani ◽  
Gholam Reza Arab Markadeh ◽  
Hossein Shahinzadeh ◽  
Yassine Amirat
Keyword(s):  
Reactive Power ◽  
Sliding Mode ◽  
Pi Controller ◽  
Induction Generator ◽  
Stator Winding ◽  
Prime Mover ◽  
Generator System ◽  
Constant Frequency ◽  
Pwm Inverter ◽  
Three Phase

This paper presents a new constant frequency, direct grid-connected wind-based induction generator system (IGS). The proposed system includes a six-phase cage rotor with two separate three-phase balanced stator windings and a three-phase SV-PWM inverter which is used as a STATCOM. The first stator winding is connected to the STATCOM and is used to excite the machine. The main frequency of the STATCOM is considered to be constant and equal to the main grid frequency. In the second stator winding, the frequency of the induced emf is equal to the constant frequency, so the generator output frequency is independent of the load power demand and its prime mover speed. The second stator winding is directly connected to the main grid without an intermediate back-to-back converter. In order to regulate the IGS output active and reactive power components, a sliding mode control (SMC) is designed. Assuming unbalanced three-phase voltages for the main grid, a second SMC is developed to remove the machine output’s negative sequence currents. Moreover, a conventional PI controller is used to force the average exchanging active power between the machine and STATCOM to zero. This PI controller generates the reference value of the rotor angular speed. An adjustable speed pitch angle-controlled wind turbine is used as the IGS’s prime mover. The effectiveness and capability of the proposed control scheme have been supported by the simulation results.

Identification of the best topology of delta configured three phase induction generator for distributed generation through experimental investigations

2021 ◽  
Vol 0 (0) ◽  
Author(s):  
Vanka Bala Murali Krishna ◽  
Sandeep Vuddanti
Keyword(s):  
Distributed Generation ◽  
Reactive Power ◽  
Voltage Regulation ◽  
Reactive Power Compensation ◽  
Induction Generator ◽  
Experimental Investigations ◽  
Small Scale ◽  
Empirical Formulas ◽  
Simple Method ◽  
Main Challenge

Abstract Research on Self –excited induction generator (SEIG) brings a lot of attentions in the last three decades as a promising solution in distributed generation systems with low cost investment. There are two important fixations to attend in the operation of SEIG based systems, a) excitation and b) voltage regulation. Many procedures are reported regarding selection of excitation capacitance in the literature, based on state-state analysis, dynamic modeling, empirical formulas and machine parameters which involve various levels of complexity in findings. Moreover, the voltage regulation is the main challenge in implementation of SEIG based isolated systems. To address this problem, many power electronic-based schemes are proposed in the literature and but these solutions have few demerits importantly that additional cost of equipment and troubles due to failure of protection schemes. In particular, the installation of SEIG takes place at small scale in kW range in remote/rural communities which should not face such shortcomings. Further in case of off-grid systems, the maximum loading is fixed based on connected rating of the generator. This paper presents the various methods to find excitation capacitance and illustrates an experimental investigation on different possible reactive power compensation methods of delta connected SEIG and aimed to identify a simple method for terminal voltage control without power electronics. In this experimental work, the prime-mover of the generator is a constant speed turbine, which is the emulation of a micro/pico hydro turbine. From the results, it is found that a simple delta connected excitation and delta configured reactive power compensation limits voltage regulation within ±6% while maintaining the frequency of ±1%, which make feasible of the operation successfully in remote electrification systems.

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