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A Reliable and Accurate Calculation of Excitation Capacitance Value for an induction generator Based on Interval Computation Technique

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International Journal of Automation and computing 2011年第4期8卷 429-436页

作者： Rajesh Kumar Thakur Vivek Agarwal Paluri S. V. Nataraj Systems and Control Engineering Interdisciplinary Programme (IDP)Mumbai 400076 India Department of Electrical Engineering IIT-Bombay Powai Mumbai 400076 India

A squirrel cage induction generator （SCIG） offers many advantages for wind energy conversion systems but suffers from poor voltage regulation under varying operating conditions. The value of excitation capacitance （C exct ） is very crucial for the selfexcitation and voltage build-up as well as voltage regulation in SCIG. Precise calculation of the value of C exct is, therefore, of considerable practical importance. Most of the existing calculation methods make use of the steady-state model of the SCIG in conjunction with some numerical iterative method to determine the minimum value of C exct . But this results in over estimation, leading to poor transient dynamics. This paper presents a novel method, which can precisely calculate the value of C exct by taking into account the behavior of the magnetizing inductance during saturation. Interval analysis has been used to solve the equations. In the proposed method, a range of magnetizing inductance values in the saturation region are included in the calculation of C exct , required for the self-excitation of a 3-φ induction generator. Mathematical analysis to derive the basic equation and application of interval method is presented. The method also yields the magnetizing inductance value in the saturation region which corresponds to an optimum C exct（min） value. The proposed method is experimentally tested for a 1.1 kW induction generator and has shown improved results.

关键词： d-q model hull consistency induction generator interval analysis interval arithmetic optimization range of interval realpaver self-excitation transients.

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A Fuzzy-PI control technique designed for Power Control of Wind Turbine based on induction generator

A Fuzzy-PI control technique designed for Power Control of W...

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The 2012 International Conference on Advanced Material and Manufacturing Science(ICAMMS 2012)

作者： Abdel Ghani.AISSAOUI Ahmed TAHOUR Mohamed ABID Najib ESSOUNBOULI Frederic NOLLET IRECOM Laboratory Departof Electrical EngeneeringUniversity of Sidi Bel Abbes

In this paper,we develop the overall model of the wind energy conversion systems（WECS） structure based on induction generator（IG）The goal of this paper is to control the power generated by the WECS and transmitted to the gridWe propose a new control strategy based on fuzzy logic in order to control the power of the WECSThe main drawback is that the WECS is highly nonlinearAn adaptive Fuzzy-PI power controller is proposed to overcome this problemA Simulation study is done to validate the strategy used in power control

关键词： Wind energy induction generator fuzzy-PI control Power control

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Lyapunov Stability Analysis for Self-Excitation of induction generators

Lyapunov Stability Analysis for Self-Excitation of Induction...

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第26届中国控制与决策会议

作者： Haitao Li Ziguang Lu College of Electrical Engineering Guangxi University

ISBN: (纸本)9781479937097

Based on Lyapunov stability theory, a holistic analysis approach is proposed for self-excited induction generator under no-load in the stationary reference frame with the transient mathematic model. Through analysis for initial transient states, a sufficient condition is fixed to be the limit cycle. The analytic formulas of the stator frequency, critical excitation capacitance and critical rotor speed are thus obtained. The self-excitation build-up can then be judged. Good agreement between measured values and calculated values verifies accuracy and validity of the critical analytic formulas, showing generality and engineering application value.

关键词： induction generator Lyapunov Stability Transient Equilibrium Limit Cycle Critical Analytic Formulas

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Ant Lion Algorithm for Optimized Controller Gains for Power Quality Enrichment of Off-grid Wind Power Harnessing Units

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Chinese Journal of Electrical Engineering 2020年第3期6卷 85-97页

作者： Kodakkal Amritha Veramalla Rajagopal Kuthuri Narasimha Raju Sabha Raj Arya Department of Electrical and Electronics Engineering BVRIT HYDERABAD College of Engineering for WomenTelangana 500090India Department of Electrical and Electronics Engineering Kakatiya Institute of Technology and ScienceTelangana 506015India Department of Electrical and Electronics Engineering Koneru Lakshmaiah Education FoundationAndhra Pradesh 522502India Department of Electrical Engineering Sardar Vallabhbhai National Institute of Technology SuratGujarat 395007India

The proposed system uses an algorithm that works on the admittance of the system,for estimating the reference values of generated currents for an off-grid wind power harnessing unit(WPHU).The controller controls the voltage and maintains the frequency within the limits while working with both linear and nonlinear loads for varying wind *** admittance algorithm is simple and easy to implement and works very efficiently to generate the triggering signals for the controller of the *** wind power harnessing unit comprising of a squirrel cage induction generator,a star-delta transformer,a battery storage system and the control unit are modeled using Matlab/Simulink *** isolated transformer with a star-delta configuration connects the load and the generator circuit with the controller to reduce the dc bus voltage and mitigate current in the neutral *** response of the system during the dynamic loading depends on the best possible compensator proportional-integral(PI)*** antlion optimization algorithm is compared with particle swarm optimization and grey wolf optimization and is found to have the advantages of good convergence,high efficiency and fast calculating *** is therefore used to extract the optimal values of frequency and voltage PI *** simulation results of the control algorithm for the WPHU are validated in a real-time environment in a dSpace1104 laboratory set *** algorithm is proven to have a quick response,maintain the required frequency,suppress the current harmonics,regulate voltage,help in balancing the load and compensating for the neutral current.

关键词： Wind power harnessing unit induction generator admittance based control algorithm ant lion optimization algorithm voltage and frequency control battery energy storage system

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Enhancement of Isolated Distributed Generation System Power Quality Using DSTATCOM 36

Enhancement of Isolated Distributed Generation System Power ...

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第36届中国控制会议

作者： Aser Asselin Loubassou Youbing Zhang Qi jun Ye sen College of Information Engineering Zhejiang University of Technology

ISBN: (纸本)9781538629185

The distributed generations（DGs） along with nonlinear loads and unbalanced loads bring new technical challenges to the efficient control of isolated distribution network power *** static synchronous compensator（DSTATCOM）is well known to be the most suitable custom power device capable to improve DGs stability,reduce harmonics and have good performances on the regulation of point of common coupling（PCC） under power system *** this paper,investigation on the performance of DSTATCOM using kernel incremental metal earning algorithm（KIMEL） have been made for voltage stability,harmonics reduction and load balancing in three-phase three-wire isolated distributed generating system based on Self Excited induction generator（SEIG） driven by biogas/biomass diesel engine as prime *** simulation results obtained in MATLAB/Simulink software verify the robustness,efficiency and effectiveness of the proposed control strategy used in DSTATCOM which achieved the whole study system power quality enhancement.

关键词： induction generator Biogas/biomass diesel engine KIMEL DSTATCOM Power Quality

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MODELING AND SIMULATION OF GRID CONNECTED WIND ELECTRIC GENERATINE SYSTEM

MODELING AND SIMULATION OF GRID CONNECTED WIND ELECTRIC GENE...

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2002年IEEE十区计算机、通信、控制和电机工程会议

作者： K.Raiambal C.Chellamuthu

The effects of variation in grid voltage andfrequency on the performancc of the grid conncctcd windelectric generating system has been studied for variouswind velocitics. The induction generator, wind turbine andother network components are modeled using MATLAB /SIMULINK .The model has bcen made realistic byconsidering the non-linear variation of R. and X. of theinduction generator. A simple simulation procedure isdeveloped to predict the system performance and theresults are presented The dynamic VAR compensation byusing TSC is also studied and the best location for thecompensating capacitor is suggested.

关键词： induction generator non-linearity Thyristor Switched Capacitor (TSC) wind energy

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