Experience in the development and operation of asynchronized turbogenerators and condensers in the Russian Power System

Shakaryan, Yury G.; Sokur, P. V.

doi:10.1515/aee-2015-0002

Cited by 9 publications

(8 citation statements)

References 2 publications

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“…Considering the characteristic (the separate control of electromagnetic torque and voltage) of dual axis excitation generator [23], c 15 can be set to zero. C m and k are given

{normalC}_{m} = [\begin{matrix} center \\ 10 & 10 & - 350 & 0 & 0 & 5 & 0 \\ 5 & 5 & 5 & 0 & 100 & 0 & 0 \\ 5000 & 5000 & 1 & 5 & 0 & 15 & 10 \end{matrix}]

…”

Section: Numerical Simulation and Discussionmentioning

confidence: 99%

“…Considering the characteristic (the separate control of electromagnetic torque and voltage) of dual axis excitation generator [23],…”

Section: System Simulation Parametersmentioning

confidence: 99%

“…): D SL = D SR = 0.5, D G = 0.5, D SGL = D SGR = 0.6. Inertia time constant (s):T JSL = T JSR = 4.8, T JG = 4.06, T V = 0.4.The operating point of the power system used in the simulation is: P e = 0.6, Q e = 0.0798, U = 1.Considering the characteristic (the separate control of electromagnetic torque and voltage) of dual axis excitation generator[23], c 15 can be set to zero. C m and k are given 10, k 2 = 35, k 3 = 20.…”

mentioning

confidence: 99%

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Torsional Vibrations Control of Double‐Ended Driving and Dual‐Excited Turbo‐Generator Shafts Based on Multi‐Index Nonlinear Control

Qin

et al. 2021

IEEJ Transactions Elec Engng

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Non-member Yejie Tian, Non-member The problem of shafting torsional vibrations has been increasingly emerging due to the increasing capacity of turbo-generator and the complexity of power grid. Therefore, how to reduce the torsional vibration of the turbo-generator shaft and improve the stability of the power system has become the focus of our research. First, in order to solve the problem and alleviate the torsional vibrations of turbo-generator shafts, this paper proposed a new shafting structure model of Double-ended Driving and Dual-Excited Turbo-Generator set (DDDETG). A static excitation mode is used for the excitation of the DDDETG and the mechanical power is supplied symmetrically and synchronously from both ends of the generator rotor. Then, in order to improve the output characteristic of the generator and further suppress the torsional vibrations of the turbo-generator shafts, combined with the nonlinear control design method of partial feedback linearization, a Multi-Index Nonlinear Coordinated Control (MINCC) strategy for the double-ended driving and dual-excited turbo-generator is proposed to ensure good dynamic and static state performances of each state in the system. Finally, the simulation results on a single-machine infinite bus system demonstrate the effectiveness of the proposed control strategy. In addition, this paper compares the performance of DDDETG and the traditional Single-ended Drive and Single-Excited Turbo Generator (SDSETG), the simulation results show that the restraint effect of the DDDETG structure on shafting torsional vibrations is more obvious under the proposed control strategy.

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“…Considering the characteristic (the separate control of electromagnetic torque and voltage) of dual axis excitation generator [23], c 15 can be set to zero. C m and k are given

{normalC}_{m} = [\begin{matrix} center \\ 10 & 10 & - 350 & 0 & 0 & 5 & 0 \\ 5 & 5 & 5 & 0 & 100 & 0 & 0 \\ 5000 & 5000 & 1 & 5 & 0 & 15 & 10 \end{matrix}]

…”

Section: Numerical Simulation and Discussionmentioning

confidence: 99%

“…Considering the characteristic (the separate control of electromagnetic torque and voltage) of dual axis excitation generator [23],…”

Section: System Simulation Parametersmentioning

confidence: 99%

mentioning

confidence: 99%

See 1 more Smart Citation

Torsional Vibrations Control of Double‐Ended Driving and Dual‐Excited Turbo‐Generator Shafts Based on Multi‐Index Nonlinear Control

Qin

et al. 2021

IEEJ Transactions Elec Engng

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show abstract

“…Such a generator operating with the long-distance transmission line is inclined to approach or exceed the stability limit. The DESG is provided with the d-and q-axis field windings, so that the direction of excitation mmf can be oriented in any direction by implementing different direct currents in both field windings [9][10][11]. Such characteristic can decouple the power angle to the rotor position angle, and thus the stability of DESG is not restricted by the power angle limit, which enables the stable operation throughout the whole range of operating conditions.…”

Section: Introductionmentioning

confidence: 99%

“…The axes of the two-phase field winding have a phase shift of 90°. Reference [9] introduced a DESG with two sets of symmetrical field winding structures elaborated and released by Eletrosil. The DESG has many advantages over the TSG, such as the high limits of steady-state and dynamic stability, the ability to operate with the consumption of reactive power and the ability to operate with variable speed.…”

Section: Introductionmentioning

confidence: 99%

Finite‐element calculation of electromagnetic characteristics and steady‐state stability of dual‐excited synchronous generator

Wang

Liu

et al. 2021

IET Electric Power Appl

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The Dual-Excited Synchronous Generator (DESG) has two sets of field windings. The magnitudes and directions of the two field currents can be regulated, so that the excitation magneto-motive force can be in any direction. The electromagnetic characteristics of the DESG may be different with those of the Traditional Synchronous Generator (TSG) for the different rotor structures of the two generators. To obtain better electromagnetic characteristics, a time-stepping finite element model (T-S FEM) of the DESG is established. The air-gap radial flux density, saturation, active and reactive power of the DESG in single-and dual-axis excitation modes are calculated and compared with those of the TSG. The electromagnetic characteristics affected by the different ratio of qaxis field current to d-axis field current are studied. On this basis, an excitation control strategy that can enhance the steady-state stability is proposed, and the steady-state stability limits with and without excitation control are calculated by the T-S FEM. A 10-kW DESG is developed to verify the correctness of the simulation results. The results show that the DESG with dual-axis excitation has better electromagnetic characteristics and stronger reactive power ability, and the steady-state stability limit of the DESG is increased obviously through the excitation control.This is an open access article under the terms of the Creative Commons Attribution-NonCommercial-NoDerivs License, which permits use and distribution in any medium, provided the original work is properly cited, the use is non-commercial and no modifications or adaptations are made.

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Optimal design of q ‐axis field winding structure of dual‐excited synchronous condenser

Luo

et al. 2022

IET Electric Power Appl

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The dual‐excited synchronous condenser (DESC) has two field windings whose axes are located at direct and quadrature axes respectively. The DESC has more capacity of absorbing reactive power than that of the traditional synchronous condenser (TSC). However, the q‐axis field winding distributed on the d‐axis magnetic pole surface can decrease the magnetic circuit area of the rotor core of DESC, thus it may result in the increase of the total harmonic distortion (THD) of the magnetic field and the oversaturation of the rotor magnetic circuit. In order to obtain better electromagnetic characteristics of DESC, a q‐axis field winding structure is proposed by optimising the number of slots, slot pitch and slot dimensions. The influences of the number and pitch of slot in q‐axis on the air‐gap radial flux density and THD of DESC are studied under the d‐, q‐ and dual‐axis excitation modes. The dimensions of the q‐axis slots are optimised by combining the time‐stepping finite element method and Taguchi method, and the optimal structure of q‐axis field winding is obtained. A 10‐kVar DESC is developed to verify the simulation results. This study provides theoretical basis for the design and manufacture of the DESC.

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Experience in the development and operation of asynchronized turbogenerators and condensers in the Russian Power System

Cited by 9 publications

References 2 publications

Torsional Vibrations Control of Double‐Ended Driving and Dual‐Excited Turbo‐Generator Shafts Based on Multi‐Index Nonlinear Control

Torsional Vibrations Control of Double‐Ended Driving and Dual‐Excited Turbo‐Generator Shafts Based on Multi‐Index Nonlinear Control

Finite‐element calculation of electromagnetic characteristics and steady‐state stability of dual‐excited synchronous generator

Optimal design of q ‐axis field winding structure of dual‐excited synchronous condenser

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