Optimizing the laws regulating the voltage induction generator

Произведена оптимизация закона регулирования напряжения асинхронного генератора путем определения настроечных параметров цифрового регулятора на основании математической модели асинхронного генераторного комплекса. Применение данного закона при проектировании судовых асинхронных генераторных комплексов позволит решить проблему регулирования напряжения асинхронного генератора.This article gives an optimization of the law regulating the voltage of the asynchronous generator by determining the tuning parameters of the digital controller based on the mathematical model of the asynchronous generator complex. The application of this law in the design of autonomous asynchronous generator systems will solve the problem of voltage regulation of asynchronous generator

Implementation of Neural Network Based Least Mean Square Algorithm with PID-VPI Controller and Integrated Electronic Load Controller for Isolated Asynchronous Small Hydro Generation

The Hydro power is recognized as the promising and widely used renewable source of energy for power generation in large scale, it is gaining popularity due to rising rate of depletion as well as increasing cost of fossil fuels. The Hydro power is very economical in case of run-of-the-river scheme, and environmental friendly keeping in mind the harmful effect of fossil fuels on the climate change. This paper deals with neural network (NN) based least mean square (LMS) algorithm known as adaptive linear element (ADALINE) algorithm, with PID-VPI controller for isolated asynchronous generator (IAG) with integrated electronic load controller (IELC) in small hydro generation feeding three-phase four-wire nonlinear load with neutral-current compensation. The integrated electronic load controller (IELC) is based on zigzag/three single-phase transformers and a six-leg insulated-gate bipolar-transistor-based current-controlled voltage-source converter, a chopper switch, and an auxiliary load on its dc bus. The integrated electronic load controller (IELC) utilizes Adaptive linear element (Adaline) to extract the positive-sequence fundamental-frequency component of load current to obtain load balancing in integrated manner and to control the voltage and frequency of the isolated asynchronous generator (IAG). Non-linear loads are considered for critical evaluation of system, as they have the capability to introduce harmonics that are deleterious for any system. The propound system is modeled and simulated in MATLAB environment to demonstrate the effectiveness of the proposed integrated electronic load controller for the control of isolated asynchronous generator. Keywords:Neural Network (NN), Least Mean Square (LMS), Adaptive Linear Element (ADALINE) Proportional integral derivative controller (PID), Vector proportional integral controller (VPI), integrated electronic load controller (IELC), isolated asynchronous generator (IAG), small hydro generation, voltage-source converter (VSC), voltage and frequency control

Sliding mode performance control applied to a DFIG system for a wind energy production

This project presents a strategy of field control then sliding mode control put in to the conversion process of wind energy containing an asynchronous generator with double fed (DFAG; DFIG). A model was developed for each component of the wind turbine (turbine, DFAG and cascade rectifier-inverter). MPPT device must be introduced in order to obtain maximum energy efficiency so that PI-MPPT method is made. The objective is to apply this command to control independently the active and reactive powers generated by the asynchronous generator uncoupled by orientation from the flow. The results of digital simulations obtained show the improvement of the performances of the sliding control compared to the field control, also it has provided information on the commands available techniques as reference tracking and robustness

Analysis Of Functional Stability Of The Triphased Asynchronous Generator Used In Conversion Systems Of A Eolian Energy Into Electric Energy

This paper presents a study of the influence of the main perturbation agent over the functional stability of the triphased asynchronous generator (for the two alternative: with coiled and short circuit rotor), used for the conversion systems from a eolian energy into electric energy

Модернізація асинхронного генератора з конденсаторним збудженням вітроенергетичної установки системи електропостачання електромеханічного обладнання Юліївського родовища

Дипломна робота присвячена модернізації асинхронного генератора з конденсаторним збудженням вітроенергетичної установки Юліївського нафтоконденсатного шляхом заміни асинхронного генератора. Досліджено технічну частину родовища, її електропостачання та конструкцію встановленого вітрогенератора. Досліджено проблематику та способи модернізації вітрогенератора. Розраховано ємнісну частину системи збудження. Розраховано асинхронного генератора. Проведені розрахунки вибраного асинхронного генератора, що використовуються у вітроенергетичній установці. Проведено аналіз отриманих даних.The thesis is devoted to the modernization of the asynchronous generator with capacitor excitation of the Yuliivskii oil condensate wind power plant by replacing the asynchronous generator. The technical part of the deposit, its power supply and the design of the installed wind generator were studied. The problems and ways of modernizing the wind generator have been studied. The capacitive part of the excitation system is calculated. An asynchronous generator is calculated. Calculations of the selected asynchronous generator used in the wind power plant were carried out. An analysis of the received data was carried out.

H-bridge VSC with a T-connected transformer for a 3-phase 4-wire voltage and frequency controller of an isolated asynchronous generator

This paper deals with a novel solid state controller (NSSC) for isolated asynchronous generator (IAG) feeding 3-phase 4-wire loads driven by constant power prime movers, such as uncontrolled pico hydro turbines. AC capacitor banks are used to meet the reactive power requirement of the asynchronous generator. The proposed NSSC is realized using a set of IGBTs (Insulated gate bipolar junction transistors) based current controlled 2-leg voltage source converter (CC-VSC) and a DC chopper at its DC bus, which keeps the generated voltage and frequency constant in spite of changes in consumer loads. The neutral point of the load is created using a T-configuration of the transformers. The IAG system is modeled in MATLAB along with Simulink and PSB (power system block set) toolboxes. The simulated results are presented to demonstrate the capability of isolated generating system consisting of NSSC and IAG driven by uncontrolled pico hydro turbine and feeding 3-phase 4-wire loads

Карактеристика момента асинхроног gенератора са двостраним напајањем pимењеног у ветроелектранама

Doubly-fed asynchronous generator expresses an especial regime of work asynchronous generator with winding rotor. This generator can works in oversynchronous and subsynchronous situation. Stator and rotor windings are connected to the same electrical grid. However, the rotor winding is fed through a semiconductor converter which can vary the electrical frequency and voltage. Doubly-fed asynchronous generator is a most useful in wind power plants. In this work we are analysed electromechanical torque of doubly-fed asynchronous generator, related with the maximum efficiency.Асинхрони генератор са двостраним напајањем представља специјални режим рада асинхроне машине са намотаним ротором. Може да ради са брзинама мањим или већим од синхроне брзине (брзине обртног магнетног поља). Намотаји статора и ротора се везују на исту мрежу, статор директно, а ротор преко полупроводничких претварача напона и учестаности. Због особине да може радити са различитим брзинама обртања, представља веома повољно решење за примену у ветроелектранама, за конверзију енергије ветра у електричну енергију. У раду је анализиран електромагнетни момент асинхроног генератора са двостраним напајањем, јер се утицајем на ову значајну величину може остварити режим рада са максималним искоришћењем ветротурбине

NEW APPROACHES FOR VERY SHORT-TERM STEADY-STATE ANALYSIS OF AN ELECTRICAL DISTRIBUTION SYSTEM WITH WIND FARMS

Distribution networks are undergoing radical changes due to the high level of penetration of dispersed generation. Dispersed generation systems require particular attention due to their incorporation of uncertain energy sources, such as wind farms, and due to the impacts that such sources have on the planning and operation of distribution networks. In particular, the foreseeable, extensive use of wind turbine generator units in the future requires that distribution system engineers properly account for their impacts on the system. Many new technical considerations must be addressed, including protection coordination, steady-state analysis, and power quality issues. This paper deals with the very short-term, steady-state analysis of a distribution system with wind farms, for which the time horizon of interest ranges from one hour to a few hours ahead. Several wind-forecasting methods are presented in order to obtain reliable input data for the steady-state analysis. Both deterministic and probabilistic methods were considered and used in performing deterministic and probabilistic load-flow analyses. Numerical applications on a 17-bus, medium-voltage, electrical distribution system with various wind farms connected at different busbars are presented and discusse