Use of a finite element model for the determination of damping and synchronizing torques of hydroelectric generators

Ranlöf, Martin; Bladh, Johan; Lundin, Urban

doi:10.1016/j.ijepes.2012.08.027

Cited by 8 publications

(3 citation statements)

References 23 publications

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“…Further, the electromagnetic repulsion force will appear to drive the copper disc’s link system, and the open or close operation can be done. To compute the electromagnetic force, a finite element method (FEM) is usually adopted (Ranlöf et al 2013; Peng et al 2014; Najafi and Iskender 2016). Considering that although FEM can analyze magnetic field and eddy current more intuitively, sometimes its modeling and calculation procedures are relatively complicated.…”

Section: Theoretical Analysismentioning

confidence: 99%

Conceptual design of a high-speed electromagnetic switch for a modified flux-coupling-type SFCL and its application in renewable energy system

Chen

Yang

et al. 2016

SpringerPlus

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The modified flux-coupling-type superconducting fault current (SFCL) is a high-efficient electrical auxiliary device, whose basic function is to suppress the short-circuit current by controlling the magnetic path through a high-speed switch. In this paper, the high-speed switch is based on electromagnetic repulsion mechanism, and its conceptual design is carried out to promote the application of the modified SFCL. Regarding that the switch which is consisting of a mobile copper disc, two fixed opening and closing coils, the computational method for the electromagnetic force is discussed, and also the dynamic mathematical model including circuit equation, magnetic field equation as well as mechanical motion equation is theoretically deduced. According to the mathematical modeling and calculation of characteristic parameters, a feasible design scheme is presented, and the high-speed switch’s response time can be less than 0.5 ms. For that the modified SFCL is equipped with this high-speed switch, the SFCL’s application in a 10 kV micro-grid system with multiple renewable energy sources are assessed in the MATLAB software. The simulations are well able to affirm the SFCL’s performance behaviors.

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Section: Theoretical Analysismentioning

confidence: 99%

Conceptual design of a high-speed electromagnetic switch for a modified flux-coupling-type SFCL and its application in renewable energy system

Chen

Yang

et al. 2016

SpringerPlus

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“…Let = − / be an uncertain constant parameter in view of the damping coefficient that cannot be measured accurately. However, it is reasonable to obtain a prior knowledge on its bound, both from literatures and practice [23][24][25]. Hence, the upper and lower bounds of can also be acquired; we assume ∈ ( min , max ).…”

Section: Dynamic Model and Problem Statementsmentioning

confidence: 99%

“…> 0, the 2 disturbance attenuation problem of system (1) can be solved by adaptive controller (25) to (27), and a positive storage function ( ) exists such that the dissipation inequality…”

Section: Theorem 2 For the Given Disturbance Attenuation Constantmentioning

confidence: 99%

Nonlinear Robust Disturbance Attenuation Control Design for Static Var Compensator in Power System

Liu

Jiang

Jing

et al. 2013

Mathematical Problems in Engineering

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The problem of designing an adaptive backstepping controller for nonlinear static var compensator (SVC) system is addressed adopting two perspectives. First, instead of artificially assuming an upper bound or inequality scaling, the minimax theory is used to treat the external unknown disturbances. The system is insensitive to effects of large disturbances due to taking into account the worst case disturbance. Second, a parameter projection mechanism is introduced in adaptive control to force the parameter estimate within a prior specified interval. The proposed controller handles the nonlinear parameterization without compromising control smoothness and at the same time the parameter estimate speed is improved and the robustness of system is strengthened. Considering the short-circuit ground fault and mechanical power perturbation, a simulation study is carried out. The results show the effectiveness of the proposed control method.

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Hydraulic damping mechanism of low frequency oscillations in power systems: Quantitative analysis using a nonlinear model of hydropower plants

et al. 2018

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Use of a finite element model for the determination of damping and synchronizing torques of hydroelectric generators

Cited by 8 publications

References 23 publications

Conceptual design of a high-speed electromagnetic switch for a modified flux-coupling-type SFCL and its application in renewable energy system

Conceptual design of a high-speed electromagnetic switch for a modified flux-coupling-type SFCL and its application in renewable energy system

Nonlinear Robust Disturbance Attenuation Control Design for Static Var Compensator in Power System

Hydraulic damping mechanism of low frequency oscillations in power systems: Quantitative analysis using a nonlinear model of hydropower plants

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