Design of a robust voltage controller for an induction generator in an autonomous power system using a genetic algorithm

Spitsa, V.; Kuperman, Alon; Rabinovici, R.

doi:10.1109/acc.2006.1657256

Cited by 8 publications

(4 citation statements)

References 11 publications

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“…Internal models with variable resonant frequencies have appeared in Canudas de Wit and Praly (2000), Esbrook, Tan, andKhalil (2011), Lu et al (2008) and Spitsa et al (2006).…”

Section: An Adaptive Controllermentioning

confidence: 97%

“…Such internal models have been used for instance in Jayawardhana andWeiss (2009), Knobloch, Isidori, andFlockerzi (1993) or Spitsa, Kuperman, Weiss, and Rabinovici (2006). The idea of the IMP is that M has infinite gain at the frequencies ω m , resulting in zero tracking errors at these frequencies, if the closed-loop system is stable.…”

Section: Velocity Control (Non-adaptive)mentioning

confidence: 98%

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Adaptive internal model-based suppression of torque ripple in brushless DC motor drives

Mandel¹

2015

Systems Science & Control Engineering

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Permanent-magnet synchronous motors (PMSMs) are widely used as high-performance variable-speed drives. Ripple in the electric torque of such motors is often a source of vibration and tracking errors, especially at low speeds. We study the torque characteristics of PMSMs and propose a method to minimize the torque ripple. First, we establish a detailed model for the motor and present a Fourier analysis of the torque ripple, caused by the non-sinusoidal back electro-motive force (BEMF) and the cogging torque, where the main conclusion is that the frequencies present in the torque disturbance are integer multiples of six times the electric frequency. The resulting model is highly nonlinear. We propose an adaptive controller based on the internal model principle, where the resonant frequencies of the controller and the associated gains change according to the motor speed. This is achieved by replacing the time variable by the motor angle, which simplifies the nonlinear model. Our approach is passivity based and will work also for complex mechanical loads and several resonant frequencies. Simulation and experimental results are given to verify the new controller. We compare the performance of our adaptive algorithm with the well-known one from [Canudas de Wit, C., & Praly, L. (2000). Adaptive eccentricity compensation. IEEE Trans. Control Syst. Technol. 8,[757][758][759][760][761][762][763][764][765][766]. We find that it performs similarly in simple configurations, and it works also when the motor is part of a more complex system, for example, when the motor is connected to a load via a very flexible shaft.

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“…Internal models with variable resonant frequencies have appeared in Canudas de Wit and Praly (2000), Esbrook, Tan, andKhalil (2011), Lu et al (2008) and Spitsa et al (2006).…”

Section: An Adaptive Controllermentioning

confidence: 97%

Section: Velocity Control (Non-adaptive)mentioning

confidence: 98%

Adaptive internal model-based suppression of torque ripple in brushless DC motor drives

Mandel¹

2015

Systems Science & Control Engineering

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“…However, in DC microgrids, synchronization is achieved by controlling inverter functions, such as (a) a reference sine waveform signal, (b) input voltage, and (c) shape and pattern of pulse width in a Pulse Width Modulator (PWM) [3]. The literature shows that for synchronization, the frequency controller [4], the excitation controller [5], nonlinear controllers [6], and Phase-Locked Loop (PLL) techniques [7,8] are used; however, they have shortcomings one way or the other. From the above references, we conclude that most techniques fail to track the phase and frequency of grid voltage during grid faults and other adverse operating conditions.…”

Section: Initial Synchronization Of DC Microgrid With the Utility's Ac Gridmentioning

confidence: 99%

Phasor Measurement Unit Assisted Inverter—A Novel Approach for DC Microgrids Performance Enhancement

Yaqub

2021

Electricity

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DC microgrids are set to change the landscape of future energy markets. However, a wide-scale deployment faces three major issues: initial synchronization of microgrid with the utility grid, slip management during its operation, and mitigation of distortions produced by the inverter. This paper proposes a Phasor Measurement Unit (PMU) Assisted Inverter (PAI) that addresses these three issues in a single solution. The proposed PAI continually receives real-time data from a Phasor Measurement Unit installed in the distribution system of a utility company and keeps constructing a real-time reference signal for the inverter. A well-constructed, real-time reference signal plays a vital role in addressing the above issues. The results show that the proposed PAI is 97.95% efficient.

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“…We offer to use asynchronous generators (AG) instead of synchronous generators in gas reciprocating power plants, asynchronous generators (AG) should be based on energy-efficient asynchronous engines with a square-cage rotor and condensing feeding. The main weak point of asynchronous generators is a steeply-deepening external characteristics [22][23][24], which is solved in our patent [25] (Fig. 4).…”

Section: Fig 3 Functional Diagram Of Device Operationmentioning

confidence: 99%

New technologies and mechanisms for greenhouses

Bogatyrev

Morgun

Poteshin

et al. 2019

Engineering for Rural Development

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The number of greenhouses for the year-round production of vegetables, fruits, flowers is increasing in many countries worldwide. Currently, the technology of production in greenhouses is quite developed. Some difference in technology takes place due to the climatic conditions of the country and types of products produced. The cost of production depends on the technology used and energy costs. The purpose of the research is as follows: to determine the effectiveness of existing technologies, their impact on the cost of production, development of new technologies and mechanisms to reduce the cost of products and increase competitiveness. As a result of the research, it was established that the curtain mechanisms, as well as vent sash windows opening, fog and ventilation formation, consume not more than 7-9 % of electrical energy. The most part of electrical energy is used for artificial lighting system, soil moistening mechanisms, supplying of nutrient solution and for electric circulation pump of hot water in the heating system. According to the results of the research, an electric activator of aqueous solutions for disinfection and plant protection has been developed to increase the efficiency of growing products in greenhouses. The design of the system of mirrors for the equal distribution of the light flux from additional illumination throughout the entire volume of plants is substantiated. All technologies and mechanisms get power from a gas turbogenerator with an asynchronous generator. Main conclusions: the practical implementation of the developed technologies and mechanisms allows to reduce a consumption of electrical energy up to 17-19 %, depending on the geographical location of a greenhouse; the proposed development are new and it received 3 patents of the Russian Federation.

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Design of a robust voltage controller for an induction generator in an autonomous power system using a genetic algorithm

Cited by 8 publications

References 11 publications

Adaptive internal model-based suppression of torque ripple in brushless DC motor drives

Adaptive internal model-based suppression of torque ripple in brushless DC motor drives

Phasor Measurement Unit Assisted Inverter—A Novel Approach for DC Microgrids Performance Enhancement

New technologies and mechanisms for greenhouses

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