Simulation Modeling of an Induction Motor Drive Controlled by an Array Frequency Converter

Baykov, D. V.; Gulyaev, I. V.; Inshakov, A. P; Teplukhov, Dmitriy

doi:10.3103/s1068371219070034

Cited by 6 publications

(2 citation statements)

References 2 publications

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“…In order to maintain the power grid frequency (an important index of power quality) fixed or within a small allowable range, a load frequency control (LFC) strategy is a common technique equipped in the power systems [1][2][3][4][5][6][7]. With the development and expansion of the power grid, a dedicated independent communication network has been unable to meet the operation of the power grid, although the small transmission delay in the dedicated independent communication network can be ignored [8].…”

Section: Introductionmentioning

confidence: 99%

Enhanced Stability Criteria of Network-Based Load Frequency Control of Power Systems with Time-Varying Delays

et al. 2021

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The stability problem for load frequency control (LFC) of power systems with two time-varying communication delays is studied in this paper. The one-area and two-area LFC systems are considered, respectively, which are modeled as corresponding linear systems with additive time-varying delays. An improved stability criterion is proposed via a modified Lyapunov-Krasovskii functional (LKF) approach. Firstly, an augmented LKF consisting of delay-dependent matrices and some single-integral items containing time-varying delay information in two different delay subintervals is constructed, which makes full use of the coupling information between the system states and time-varying delays. Secondly, the novel negative definite inequality equivalent transformation lemma is used to transform the nonlinear inequality to the linear matrix inequality (LMI) equivalently, which can be easily solved by the MATLAB LMI-Toolbox. Finally, some numerical examples are presented to show the improvement of the proposed approach.

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Section: Introductionmentioning

confidence: 99%

Enhanced Stability Criteria of Network-Based Load Frequency Control of Power Systems with Time-Varying Delays

et al. 2021

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“…maximum allowable time delay upper bounds to guarantee the stability of the power system based on LFC scheme, which has attracted more and more scholars' attention (Ali et al, 2020;del Giudice et al, 2021;Ladygin et al, 2020;Baykov et al, 2019). The stability conditions and controller design are obtained mainly by the Lyapunov stability theory.…”

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confidence: 99%

Optimization and H∞ Performance Analysis for Load Frequency Control of Power Systems With Time-Varying Delays

Su¹,

Li²,

Chen³

et al. 2021

Front. Energy Res.

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With the development and expansion of the power grid, the load frequency control (LFC) scheme receives sensor signals and outputs control signals through an open communication network with a mass of data and extensive information exchange, which may introduce constant, and time-varying delays. This paper considers the optimization and H∞ performance problem for LFC of power systems with time-varying delays. Some improved criteria for guaranteeing the stability and H∞ performance of the closed-loop system with unknown external load disturbances via the Lyapunov stability theory application. An unique delay-dependent proportional-integral (PI) controller and an optimized PI controller are designed for a specified H∞ performance index and set, respectively. The criteria proposed in this paper are based on linear matrix inequalities (LMIs), which can be easily solved by the MATLAB LMI-Toolbox. Finally, in case studies, the effectiveness of our method is demonstrated.

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Optimization of the magnetic system of a VR machine for traction electric drives in agriculture

Zakharov¹,

Tulegenov²

2020

IOP Conf. Ser.: Earth Environ. Sci.

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The purpose of this article is to optimize a VR machine for traction electric drives in agriculture, as well as to identify its advantages and disadvantages, to compare an electric drive based on a test machine with an asynchronous electric drive of the same size. The optimal ratio of the elements of the magnetic system of the electromechanical converter based on the VR machine. It is shown that the overload capacity of an electric drive with a VR machine is about 25%. The specific electromagnetic moment of the studied machine is 30% higher than the corresponding indicator of an asynchronous machine of the same size in the nominal operating mode. The disadvantage of this machine is its low power factor, only 7%. This is due to the small ratio of conductivities along the longitudinal and transverse axes of the machine due to the large number of stator and rotor teeth. The problem is solved by introducing additional DC or AC windings on the stator. It is shown that a change in the air gap significantly affects the specific moment. Only by reducing by 2 times the air gap managed to increase the moment by 48%.

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Simulation Modeling of an Induction Motor Drive Controlled by an Array Frequency Converter

Cited by 6 publications

References 2 publications

Enhanced Stability Criteria of Network-Based Load Frequency Control of Power Systems with Time-Varying Delays

Enhanced Stability Criteria of Network-Based Load Frequency Control of Power Systems with Time-Varying Delays

Optimization and H∞ Performance Analysis for Load Frequency Control of Power Systems With Time-Varying Delays

Optimization of the magnetic system of a VR machine for traction electric drives in agriculture

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