Transient stability improvement of a transmission system through the application of an artificial neural network-based high-voltage direct current system
The increasing disturbances in power system networks present significant challenges to electrical power engineers, often leading to a loss of synchronism in grid-tied generators. It is important to ensure voltage, angle, and frequency stability in power system for efficient grid operation and a sust...
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| Format: | Article |
| Language: | English |
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SAGE Publishing
2025-07-01
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| Series: | Energy Exploration & Exploitation |
| Online Access: | https://doi.org/10.1177/01445987251327693 |
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| author | Chibuike Peter Ohanu Uche C Ogbuefi Emenike Ejiogu |
| author_facet | Chibuike Peter Ohanu Uche C Ogbuefi Emenike Ejiogu |
| author_sort | Chibuike Peter Ohanu |
| collection | DOAJ |
| description | The increasing disturbances in power system networks present significant challenges to electrical power engineers, often leading to a loss of synchronism in grid-tied generators. It is important to ensure voltage, angle, and frequency stability in power system for efficient grid operation and a sustainable power supply. This paper investigates transient stability enhancement in multi-generator system using an artificial neural network (ANN)-based control technique. The conventional high-voltage direct current (HVDC) systems are based on a fixed proportional integral controller parameters to function efficiently, but the proposed ANN-based technique dynamically adjusts the thyristor firing angle in real-time to improve system stability. This intelligent control mechanism enhances transient stability by optimizing power system responses based on real-time operational data. The effectiveness of the proposed method is tested on a real 330-kV, 40-bus Nigeria transmission network, modeled in Power System Analysis Toolbox. The Newton–Raphson power flow method is employed to determine the base-case characteristics of the network. To achieve stable system operation, the voltage magnitude of a transmission system must fall within the statutory limit of 0.95–1.05 per unit (pu). However, power flow studies indicate a significant low-voltage profile of 0.70 pu on the network. Implementing the ANN-based HVDC system, three-phase faults are cleared within 2 ms, demonstrating a significant improvement compared to the 3-ms critical clearing time achieved using conventional method. Additionally, the ANN-based controller enhances voltage stability, achieving a minimum voltage magnitude of 0.98 pu, representing a 27.8% improvement over the conventional approach. The results confirm that the proposed ANN-based HVDC system offers superior transient stability performance by dynamically adjusting the system response, ensuring better fault ride-through capability and improved voltage profile. The findings highlight the potential of ANN-based controllers in improving transient stability in modern power systems. |
| format | Article |
| id | doaj-art-c13dc4cfd8c54b2bb7d289a5fec2f5fc |
| institution | Kabale University |
| issn | 0144-5987 2048-4054 |
| language | English |
| publishDate | 2025-07-01 |
| publisher | SAGE Publishing |
| record_format | Article |
| series | Energy Exploration & Exploitation |
| spelling | doaj-art-c13dc4cfd8c54b2bb7d289a5fec2f5fc2025-08-20T03:28:55ZengSAGE PublishingEnergy Exploration & Exploitation0144-59872048-40542025-07-014310.1177/01445987251327693Transient stability improvement of a transmission system through the application of an artificial neural network-based high-voltage direct current systemChibuike Peter Ohanu0Uche C Ogbuefi1Emenike Ejiogu2 Africa Centre of Excellence for Sustainable Power and Energy Development (ACE-SPED), University of Nigeria, Nsukka, Nigeria Africa Centre of Excellence for Sustainable Power and Energy Development (ACE-SPED), University of Nigeria, Nsukka, Nigeria Africa Centre of Excellence for Sustainable Power and Energy Development (ACE-SPED), University of Nigeria, Nsukka, NigeriaThe increasing disturbances in power system networks present significant challenges to electrical power engineers, often leading to a loss of synchronism in grid-tied generators. It is important to ensure voltage, angle, and frequency stability in power system for efficient grid operation and a sustainable power supply. This paper investigates transient stability enhancement in multi-generator system using an artificial neural network (ANN)-based control technique. The conventional high-voltage direct current (HVDC) systems are based on a fixed proportional integral controller parameters to function efficiently, but the proposed ANN-based technique dynamically adjusts the thyristor firing angle in real-time to improve system stability. This intelligent control mechanism enhances transient stability by optimizing power system responses based on real-time operational data. The effectiveness of the proposed method is tested on a real 330-kV, 40-bus Nigeria transmission network, modeled in Power System Analysis Toolbox. The Newton–Raphson power flow method is employed to determine the base-case characteristics of the network. To achieve stable system operation, the voltage magnitude of a transmission system must fall within the statutory limit of 0.95–1.05 per unit (pu). However, power flow studies indicate a significant low-voltage profile of 0.70 pu on the network. Implementing the ANN-based HVDC system, three-phase faults are cleared within 2 ms, demonstrating a significant improvement compared to the 3-ms critical clearing time achieved using conventional method. Additionally, the ANN-based controller enhances voltage stability, achieving a minimum voltage magnitude of 0.98 pu, representing a 27.8% improvement over the conventional approach. The results confirm that the proposed ANN-based HVDC system offers superior transient stability performance by dynamically adjusting the system response, ensuring better fault ride-through capability and improved voltage profile. The findings highlight the potential of ANN-based controllers in improving transient stability in modern power systems.https://doi.org/10.1177/01445987251327693 |
| spellingShingle | Chibuike Peter Ohanu Uche C Ogbuefi Emenike Ejiogu Transient stability improvement of a transmission system through the application of an artificial neural network-based high-voltage direct current system Energy Exploration & Exploitation |
| title | Transient stability improvement of a transmission system through the application of an artificial neural network-based high-voltage direct current system |
| title_full | Transient stability improvement of a transmission system through the application of an artificial neural network-based high-voltage direct current system |
| title_fullStr | Transient stability improvement of a transmission system through the application of an artificial neural network-based high-voltage direct current system |
| title_full_unstemmed | Transient stability improvement of a transmission system through the application of an artificial neural network-based high-voltage direct current system |
| title_short | Transient stability improvement of a transmission system through the application of an artificial neural network-based high-voltage direct current system |
| title_sort | transient stability improvement of a transmission system through the application of an artificial neural network based high voltage direct current system |
| url | https://doi.org/10.1177/01445987251327693 |
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