Modeling of Ukraine –European Union Energy Bridge Modes

Seheda, Mykhailo; Pokrovskij, K.; Mavrin, O.; Olijnyk, V.

doi:10.15407/publishing2019.52.017

Cited by 2 publications

(3 citation statements)

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“…where r r , x r are the rotor array resistance and rotor array reactance, pu; A r , B r , A x , B x are the constant coefficients of approximation table dependencies. To analyze the ASTG asynchronous mode, the transition to complex plane is done considering p=0 and taking that u fd =u fq =0 in case of short-circuited terminals for excitation winding. After the equations (1) and (2) transformations, the equations set 3…”

Section: Presentation and Discussion Of The Research Resultsmentioning

confidence: 99%

“…The reactive power excess appearance is especially notable during load reduction hours through the visible voltage levels deviation at the energy-generating nodes in an upward direction [1]. The existing compensation means of excess reactive power like shunt reactors are not always able to perform their functions under such conditions due to their relatively low reliability [2]. An additional factor that exacerbates the problem of reactive power excess manifestations is the narrowing of the control range by automatic excitation regulators of synchronous generators.…”

Section: Definition Of the Problem To Be Solvedmentioning

confidence: 99%

“…The application of asynchronized turbogenerators (ASTG) with the ability to operate in asynchronous mode with deep reactive power consumption could solve the problem of reactive power excess in power generating nodes during load reduction hours due to the capability to resorb the reactive power without restrictions on both stator core ends heating and ensuring the generators operation stability [1][2][3][4][5]7]. To analyze possible asynchronous modes of powerful ASTG (with the excitation winding disconnected) in real schemes it is necessary to take into account its asynchronous characteristics depending on voltage level deviation at stator winding.…”

Section: Analysis Of the Recent Publications And Research Work On Thmentioning

confidence: 99%

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Voltage deviations influence on asynchronous characteristics of powerful asynchronized turbogenerator

Pokrovskyi¹,

Muzychak²

2020

Energy eng. control syst.

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The widespread applying of electrical grids with voltage classes 330 and 750 kV with powerful units of nuclear and heat power plants creates a set of problems with normal modes ensuring in the Ukrainian energy system. Due to sufficiently great transverse capacitance of such overhead lines, significant amounts of reactive power excess are possible in the system. This phenomenon manifests itself especially in the load reduction hours in the power system through the visible voltage levels deviation at the energy-generating nodes in an upward direction. The application of asynchronized turbogenerators with the ability to work in asynchronous mode could solve the problem of reactive power excesses in the energy-generating nodes during load reduction hours in the power system due to their possibility of deep reactive power consumption. The paper presents the calculated results of the asynchronous modes coordinates for an asynchronized turbogenerator with a capacity 1000 MW based on the parameters of the equivalent circuit, taking into account possible generator stator voltage deviations within ±10%. The influence of voltage deviations on the asynchronous modes coordinates is shown. Due to the obtained characteristics, it is possible to perform engineering estimations of the possible asynchronous mode applying for the asynchronized generator under conditions of nuclear and thermal power plants and taking into account possible voltage deviations.

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Section: Presentation and Discussion Of The Research Resultsmentioning

confidence: 99%

Section: Definition Of the Problem To Be Solvedmentioning

confidence: 99%