The influence of damping resistance on first swing stability of turbine generator considering stator transient

Xu, Guorui; Zhan, Yang; Zhao, Haisen; Liu, Xiaofang

doi:10.1016/j.ijepes.2017.12.004

Cited by 3 publications

(1 citation statement)

References 14 publications

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“…The parameters of the SG are variable along with the change of operating states due to the non-linear factors, such as magnetic saturation, distortion and skin effect. However, with the constant parameter practical model (CPPM) that is deduced from the Park equation by introducing some assumptions [8,9], it is difficult to take into account the time-varying characteristic of the parameters and to guarantee the precision of the simulation results. The calculation results of the CPPM are apparently inconsistent with the The two sets of the parameters are often identified according to the dynamic curves of the SG, such as the field current, stator current and rotor speed [15][16][17].…”

Section: Introductionmentioning

confidence: 99%

Variable parameter practical model of synchronous generator for precise simulation of power system

Yuan

et al. 2022

IET Generation Trans & Dist

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The model of synchronous generator (SG) plays an important role in the simulation of power system and planning of power grid. With the constant parameter practical model (CPPM), it is difficult to consider the time‐varying characteristic of the parameters affected by the complex non‐linear factors, such as the saturation, distortion, skin effect and various spatial harmonics; thus, it cannot guarantee the precision of the simulation. In this paper, a variable parameter practical model (VPPM) of SG is proposed by coupling the CPPM with the three‐dimensional parameter database and the parameter addressing model. The three‐dimensional parameter database containing the steady‐state, transient and sub‐transient reactances and time constants is established with the terminal voltage, active power and reactive power as the variables. The parameters of the VPPM are selected through linear inter‐polation according to the operating states of the generator. In order to verify the precision of the VPPM, a single‐machine infinite system and a real power system with 204 buses and 107 generators are simulated. The result indicates that the VPPM is more accurate than the CPPM, and the stability limit and damping ratio calculated by the VPPM are larger than that by the CPPM. The study can provide important support for the precise simulation of the power system.

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Section: Introductionmentioning

confidence: 99%

Variable parameter practical model of synchronous generator for precise simulation of power system

Yuan

et al. 2022

IET Generation Trans & Dist

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A first swing stability improvement approach in microgrids with synchronous distributed generators

Fayazi

Moazzami

Fani

et al. 2021

Int Trans Electr Energ Syst

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Summary One of the effective approaches to maintain power generation consumption balance during contingencies and therefore transient stability of the system is instantaneous rise of generation power and changing the generators excitation control system. This article proposes an auxiliary droop controller, which can replace generator main controller in order to maintain the transient stability of the system at the time of fault occurrence. Because of its linear structure, the proposed droop controller has a high response speed, so it can well supply the additional power demand given the rapid changes of the electric power demand at the time of fault occurrence. The proposed controller replaces the main controller of the generator that has the most impact on the maintaining system transient stability. Therefore, in the proposed method, first, the most efficient generator of the grid is identified using trajectory sensitivity analysis. Then, to maintain balance between power generation and consumption at the worst time of fault occurrence, the smallest amount of auxiliary controller slope is calculated through trajectory sensitivity analysis. Therefore, under any contingencies occurrence in the system, replacing the main controller with an appropriate auxiliary one will guarantee the transient stability of the system. The affectivity of the proposed method is shown using simulations on the IEEE 33‐bus test system. The simulation results show that the proposed auxiliary control method can lead to the at least 20% increase of critical clearing time (CCT) compared to the conventional droop control method. Furthermore, it is robust against the changes of inertia, up to 5%, as one of the main parameters in the first swing stability of the system.

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Winding function model of Grid-Connected synchronous Turbo-Generator with damper winding

Kajević,

Ciriani,

Joksimović

2024

International Journal of Electrical Power & Energy Systems

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The influence of damping resistance on first swing stability of turbine generator considering stator transient

Cited by 3 publications

References 14 publications

Variable parameter practical model of synchronous generator for precise simulation of power system

Variable parameter practical model of synchronous generator for precise simulation of power system

A first swing stability improvement approach in microgrids with synchronous distributed generators

Winding function model of Grid-Connected synchronous Turbo-Generator with damper winding

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