Conventional techniques for improving emergency control of transient stability in renewable-based power systems

Tina, Giuseppe Marco; Licciardello, Sebastiano; Stefanelli, Domenico

doi:10.1109/irec.2018.8362545

Cited by 12 publications

(5 citation statements)

References 18 publications

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“…The out-of-step operation of such gas-turbine units is eliminated by relay protection devices with an angle setting of up to 180 • to prevent the GTU transition to out-of-step conditions. Consequently, the admissibility and duration of out-of-step conditions, along with the choice of out-ofstep protection algorithms for specific gas turbines, should be taken into account in the design of emergency control systems [25].…”

Section: Fundamental Design Features Of Gas-turbine Unitsmentioning

confidence: 99%

Consideration of Distinguishing Design Features of Gas-Turbine and Gas-Reciprocating Units in Design of Emergency Control Systems

et al. 2021

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Modern gas-turbine units (GTUs) and gas-reciprocating units (GRUs) have found a wide use at power plants, including distributed generation facilities, running on gaseous fuel. The design features of these generating units have a considerable effect on the nature and parameters of transient processes due to emergency disturbances in the adjacent network. The study shows that single-shaft gas-turbine and gas-reciprocating units do not allow even short-term considerable frequency drops. These schemes and operating conditions arise due to emergency active power shortages when the connection between the power plant and the power system weakens due to repair conditions or islanded operation. The paper presents the results of transient process calculations for operating power plants (distributed generation facilities), which make it possible to identify the unfavorable properties of GTUs and GRUs. The results show that two-shaft (three-shaft) GTUs and GRUs can switch to out-of-step conditions even when short-circuits in the adjacent network are cleared with high-speed relay protection devices. The features of out-of-step conditions and the admissibility of their short-term duration for the spontaneous restoration of generators’ synchronization are considered. The findings suggest that considering the fundamental design features of generating units provides informed technical decisions on equipping power plants (distributed generation (DG) facilities) and the adjacent network with efficient emergency control systems.

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Section: Fundamental Design Features Of Gas-turbine Unitsmentioning

confidence: 99%

Consideration of Distinguishing Design Features of Gas-Turbine and Gas-Reciprocating Units in Design of Emergency Control Systems

et al. 2021

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“…Since stability problems are mostly associated with such "weak cutsets", ensuring the dynamic stability of a distribution grid is less of an issue. Analysis of systemwide accidents and emergencies in distribution grids shows that they differ in nature from those in transmission grids [7][8][9][10][11].…”

Section: Specifics Of Distribution Gridsmentioning

confidence: 99%

Specifics of Emergency Operation in Distribution Grid and their Effect on Integration and Functioning of Distributed Generation Facilities

Ilyushin

Kulikov

2021

Energy Systems Research

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This paper focuses on the characteristic features of distribution grids, which have the greatest impact on the stability of generators and motor loads. It shows that severe accidents in distribution and transmission grids differ in nature, starting with an overload leading to line disconnections and further evolving into a voltage collapse. It appears that where generator capacity is commensurate with the total power of motors in a grid, the motor load has a significant impact on transients. The paper discusses how asynchronous operation is triggered, progresses, and can be addressed in a grid with distributed generation (DG) facilities. It further analyzes the consequences of deep grid sectionalization and proves why grid structure needs to be optimized for further development. The paper also shows how to take into account the specifics of emergency processes (i.e., accident-associated processes) in distribution grids when integrating and operating DG facilities.

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“…The characteristics of the DC power dip caused by the sending-side fault has been studied by (Tu et al, 2016), who also analyzed the rotor angle instability mode of the sending-side system caused by the DC fault dip from the mechanism. The problem of insufficient moment of inertia of the system after the accident has been studied by (Tina et al, 2018), who also proposed a method for evaluating the moment of inertia of the system using an independent system, to ensure the transient stability of the system. Siddiqui et al (2016) used the data provided by the phasor measurement units to predict the system's risk of instability, after a large disturbance.…”

Section: Introductionmentioning

confidence: 99%

Transient Stability Analysis of the Two-Area With AC/DC Paralleled Interconnected Power System in Different Operation

et al. 2021

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In order to deeply explore the transient stability mechanism of the AC/DC hybrid system, this paper analyzes the rotor angle stability of the two-area AC/DC hybrid system. The system is analyzed after subjecting it to large disturbances in the AC system and for different operating conditions, qualitatively and quantitatively. The influence of factors, such as the AC operating point of the system and the proportion of DC transmission power, have been considered for improving the rotor motion equation. Subsequently, the transient characteristics of the hybrid system are analyzed after being subjected to disturbances. The power angle stability margin index is obtained, based on which the transient characteristics after DC blocking are analyzed, and the coordinated control strategy with the least control cost is proposed. The results are verified using the two-area AC/DC parallel transmission system network model. The study provides the reference for ensuring the security and stability of the hybrid AC/DC power grid.

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Conventional techniques for improving emergency control of transient stability in renewable-based power systems

Cited by 12 publications

References 18 publications

Consideration of Distinguishing Design Features of Gas-Turbine and Gas-Reciprocating Units in Design of Emergency Control Systems

Consideration of Distinguishing Design Features of Gas-Turbine and Gas-Reciprocating Units in Design of Emergency Control Systems

Specifics of Emergency Operation in Distribution Grid and their Effect on Integration and Functioning of Distributed Generation Facilities

Transient Stability Analysis of the Two-Area With AC/DC Paralleled Interconnected Power System in Different Operation

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