Fast Decoupled Power Flow for Power System with High Voltage Direct Current Transmission Line System

Kumkratug, Prechanon

doi:10.3844/ajassp.2010.1115.1117

Cited by 6 publications

(5 citation statements)

References 11 publications

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“…This problem can be reduced to the generation of a graph with minimal crossings, based on the connectivity information among the buses (network topology data). Regarding the bus/branch one-line diagram model, this information can be extracted from the system nodal admittance matrix (Monticelli, 1999;Mota et al, 2002;Kumkratug, 2010a;2010b), where diagonal elements define the buses and non-diagonal elements define the branches. Though, considering interconnected and large actual power systems (with thousands of nodes and arcs), automatic graph drawing is not a simple task.…”

Section: Generation Of One-line Diagrams With Graph Layout Techniquesmentioning

confidence: 99%

Drawing Meshed One-Line Diagrams of Electric Power Systems using a Modified Controlled Spring Embedder Algorithm Enhanced with Geospatial Data

Mota¹,

Mota²

2011

Journal of Computer Science

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Problem statement: One-line diagrams are widely used in electrical power systems to provide a graphical view of state of the system and to assess its performance. Several methodologies and algorithms have been proposed to automatically draw the power system's one-line diagram and provide satisfactory results for radial or small-size meshed networks. Nevertheless, actual power systems models are generally associated to strongly meshed networks and in this case, the usage of the mentioned methodologies can yield unsatisfactory solutions, with a great number of line crossings. Approach: This study proposes a method that generates bus/branch one-line diagrams of meshed power systems, based on a modified version of the Controlled Spring Embedder algorithm enhanced by the usage of physical laws and geospatial data.Results: The methodology was tested using a portion of the Brazilian interconnected power system that corresponds to a meshed bus/branch model with 58 nodes and 64 branches. The graphical portrayal was obtained from the branches list of the network, firstly without the presence of geographical information and then considering it. Conclusion: The proposed algorithm was able to evolve a graphical portrayal of the bus/branch electric model of a power system, yielding satisfactory results. In special, geospatial data have proved to be fundamental information, allowing the elimination of branch crossings and providing consistent representations for a specific electrical network in 95% of the simulated cases.

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Section: Generation Of One-line Diagrams With Graph Layout Techniquesmentioning

confidence: 99%

Drawing Meshed One-Line Diagrams of Electric Power Systems using a Modified Controlled Spring Embedder Algorithm Enhanced with Geospatial Data

Mota¹,

Mota²

2011

Journal of Computer Science

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“…(Chen, 2011;Kouzou et al, 2010;Kumkratug, 2010a;Omar et al, 2010;Zhihuan, et al, 2010;Osuwa and Igwiro, 2010). They have proposed many methods to improve stability of power system such as load shedding, High Voltage Direct Current (HVDC), Flexible AC Transmission system (FACTS), etc (Al-Husban, 2009;Barbuy et al, 2009;Hannan et al, 2009;Kumkratug, 2010b;Mohammadi-Ivatloo, 2009;Sahoo, et al, 2010;Zarate-Minano et al, 2010).…”

Section: Introductionmentioning

confidence: 99%

Evaluation of Critical Clearing Time of Power System Equipped With a Series FACT Devices

Kumkratug¹

2011

Journal of Computer Science

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Problem statement:The critical clearing time provides very important role of the robustness in power system. The Static Synchronous Series Compensator (SSSC) has been accepted to be equipped in series with modern power system. This study presents the method to evaluate the Critical Clearing Time (CCT) of the system equipped with a SSSC. Approach: The parameter on SSSC is modeled in energy function. The presented energy function is applied to determine CCT of the system. The verification of the proposed method is tested on sample system. Results: The maximum generator rotor angle of the faulted system without a SSSC is continuously oscillation and the maximum value is much more than the system with a SSSC. Conclusion: SSSC based the proposed nonlinear control can damp power system oscillation.

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“…Transient stability is one of the important aspects in power system (Zarate-Minano at al., 2010;Pizano-Matinez at al., 2009;Augusto at al., 2008). There are many advanced devices have been proposed during the last three decades to improve stability of power system such as High Voltage Direct Current (HVDC) system and Flexible AC Transmission System (FACTS) devices (Ahmad and Al-Husban, 2009;Moghadasi et al, 2008;Kumkratug, 2010).…”

Section: Introductionmentioning

confidence: 99%

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Kumkratug¹

2010

American Journal of Applied Sciences

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Problem statement: The enhancement of transient stability of the power system is one of the most challenging research areas in power engineer. Approach: This study presents the method to enhance transient stability of power system by Unified Power Flow Controller (UPFC). The mathematical model of power system equipped with a UPFC is systematically derived. The parameters of UPFC are modeled into power flow equation and thus it is used to determine control strategy. The swing curves of the three phase faulted power system without and with a UPFC are tested and compared in various cases. Results: The swing curve of system without a UPFC gets increases monotonically and thus the system can be considered as unstable whereas the swing curves of system with a UPFC can return to stable equilibrium point. Conclusion: From the simulation results, the UPFC can enhance transient stability of power system.

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Fast Decoupled Power Flow for Power System with High Voltage Direct Current Transmission Line System

Cited by 6 publications

References 11 publications

Drawing Meshed One-Line Diagrams of Electric Power Systems using a Modified Controlled Spring Embedder Algorithm Enhanced with Geospatial Data

Drawing Meshed One-Line Diagrams of Electric Power Systems using a Modified Controlled Spring Embedder Algorithm Enhanced with Geospatial Data

Evaluation of Critical Clearing Time of Power System Equipped With a Series FACT Devices

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