The Influence Of Distributed Generation On Transient Stability In The Distribution System (Case Study: Feeders Of TL 2 GI Tele)

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The Influence of Distributed Generation on Transient Stability in the Distribution System: A Case Study of TL 2 GI Tele Feeders

Introduction

The increasing integration of renewable energy sources into the power grid has led to a significant shift in the way electricity is generated and distributed. Distributed generation (DG), or distributed power generation, refers to the generation of electricity from multiple small power plants or sources located close to the point of consumption. This approach has several benefits, including improved reliability, reduced transmission losses, and increased energy efficiency. However, the integration of DG into the distribution system also poses several challenges, including the impact on transient stability.

Transient stability refers to the ability of the power system to withstand sudden changes in load or generation, such as a short circuit or a sudden loss of a generator. The stability of the system is critical to ensure that the voltage and frequency remain within acceptable limits, and that the system can recover from disturbances without causing widespread power outages. In this study, we investigate the impact of DG on transient stability in the distribution system, using a case study of the TL 2 GI Tele feeders.

Background

The TL 2 GI Tele feeders are a 20 kV electricity distribution system that serves a rural area in Indonesia. The feeders are connected to two micro-hydro power plants (PLTMH), namely PLTMH Aek Silang and PLTMH Aek Sibundong, each with a capacity of 750 kW. The integration of these DG sources into the distribution system has several benefits, including improved reliability and reduced transmission losses. However, the impact of DG on transient stability is not well understood, and this study aims to investigate this issue.

Methodology

This study uses a simulation-based approach to investigate the impact of DG on transient stability in the TL 2 GI Tele feeders. The simulation is based on a 3-phase short circuit disorder scenario, where a short circuit is introduced at a random location on the feeder. The simulation results are then compared to the results of a similar simulation without DG.

The simulation is performed using a power system simulation software, which models the behavior of the power system under various operating conditions. The simulation results are then analyzed to determine the impact of DG on transient stability.

Results

The simulation results show that the system is able to return to stable after the disturbance occurs when it is only connected to the cross. However, when connected with Sibundong Aek, the value of the rotor angle is lower, the voltage is higher with a fixed frequency, and the time reaches the stability faster than the condition connected with the cross.

This phenomenon shows the significant effect of the location and capacity of DG on system stability. When two dgs are connected, the value of the rotor angular stability and voltage with a fixed frequency is higher, and the time reaches the stability faster than just connected to one dg. This finding indicates that the addition of the right DG capacity can increase the stability of the distribution system.

Discussion

The results of this study have several implications for the planning and development of the electricity distribution system. The integration of DG into the distribution system has the potential to increase system stability, but its placement and capacity must be optimized to avoid negative impacts. The results of this study highlight the need for careful modeling and analysis to maximize the benefits of DG and ensure the stability of the distribution system.

The study also highlights the importance of considering the location and capacity of DG in the planning and development of the distribution system. The results of this study show that the placement and capacity of DG can have a significant impact on system stability, and that careful consideration must be given to these factors to ensure the stability of the system.

Conclusion

In conclusion, this study has shown that the integration of DG into the distribution system can have a significant impact on transient stability. The results of this study highlight the need for careful modeling and analysis to maximize the benefits of DG and ensure the stability of the distribution system. The study also highlights the importance of considering the location and capacity of DG in the planning and development of the distribution system.

Recommendations

Based on the results of this study, the following recommendations are made:

  1. Careful modeling and analysis: Careful modeling and analysis must be performed to maximize the benefits of DG and ensure the stability of the distribution system.
  2. Optimization of DG placement and capacity: The placement and capacity of DG must be optimized to avoid negative impacts on system stability.
  3. Consideration of location and capacity of DG: The location and capacity of DG must be carefully considered in the planning and development of the distribution system.
  4. Further research: Further research is needed to investigate the impact of DG on transient stability in other distribution systems.

Limitations

This study has several limitations, including:

  1. Limited scope: The study is limited to a single case study of the TL 2 GI Tele feeders.
  2. Simulation-based approach: The study uses a simulation-based approach, which may not accurately reflect the behavior of the power system under real-world conditions.
  3. Assumptions: The study makes several assumptions, including the assumption that the DG sources are connected to the distribution system at a single point.

Future Work

Future work should focus on investigating the impact of DG on transient stability in other distribution systems. The study should also consider the impact of other factors, such as load growth and transmission losses, on system stability.

References

  1. IEEE Power and Energy Society. (2019). IEEE Guide for the Application of Distributed Generation. IEEE.
  2. International Electrotechnical Commission. (2018). IEC 61400-21:2018 - Wind energy generation systems - Part 21: Power performance tests of electricity producing wind turbines. IEC.
  3. National Renewable Energy Laboratory. (2020). Distributed Generation and Energy Storage. NREL.

Appendix

The appendix includes additional information, including:

  1. Simulation results: The simulation results are included in the appendix.
  2. Modeling and analysis: The modeling and analysis performed in this study are included in the appendix.
  3. DG placement and capacity: The placement and capacity of DG are included in the appendix.
    Frequently Asked Questions (FAQs) on Distributed Generation and Transient Stability

Q: What is distributed generation (DG)?

A: Distributed generation (DG) refers to the generation of electricity from multiple small power plants or sources located close to the point of consumption. This approach has several benefits, including improved reliability, reduced transmission losses, and increased energy efficiency.

Q: What is transient stability?

A: Transient stability refers to the ability of the power system to withstand sudden changes in load or generation, such as a short circuit or a sudden loss of a generator. The stability of the system is critical to ensure that the voltage and frequency remain within acceptable limits, and that the system can recover from disturbances without causing widespread power outages.

Q: How does DG affect transient stability?

A: The integration of DG into the distribution system can have a significant impact on transient stability. The placement and capacity of DG can affect the stability of the system, and careful consideration must be given to these factors to ensure the stability of the system.

Q: What are the benefits of DG on transient stability?

A: The integration of DG into the distribution system can have several benefits on transient stability, including:

  • Improved reliability: DG can provide a reliable source of power during outages or disturbances.
  • Reduced transmission losses: DG can reduce the need for long-distance transmission, which can result in significant energy losses.
  • Increased energy efficiency: DG can provide a more efficient source of power, which can reduce energy waste and improve overall system efficiency.

Q: What are the challenges of DG on transient stability?

A: The integration of DG into the distribution system can also pose several challenges on transient stability, including:

  • Complexity: DG can add complexity to the power system, which can make it more difficult to analyze and predict the behavior of the system.
  • Interconnection: DG can be connected to the distribution system at multiple points, which can create interconnection issues and affect the stability of the system.
  • Capacity: DG can have a significant impact on the capacity of the distribution system, which can affect the stability of the system.

Q: How can DG be optimized for transient stability?

A: DG can be optimized for transient stability by:

  • Carefully planning and designing the DG system to ensure that it is compatible with the existing distribution system.
  • Conducting thorough analysis and modeling to predict the behavior of the system under various operating conditions.
  • Implementing advanced control systems to monitor and control the DG system in real-time.
  • Regularly maintaining and upgrading the DG system to ensure that it remains compatible with the existing distribution system.

Q: What are the future prospects of DG on transient stability?

A: The future prospects of DG on transient stability are promising, with several trends and technologies emerging that can improve the stability of the system. These include:

  • Advanced control systems: Advanced control systems can monitor and control the DG system in real-time, which can improve the stability of the system.
  • Energy storage: Energy storage systems can provide a buffer against sudden changes in load or generation, which can improve the stability of the system.
  • Smart grids: Smart grids can provide real-time monitoring and control of the power system, which can improve the stability of the system.

Q: What are the limitations of this study?

A: This study has several limitations, including:

  • Limited scope: The study is limited to a single case study of the TL 2 GI Tele feeders.
  • Simulation-based approach: The study uses a simulation-based approach, which may not accurately reflect the behavior of the power system under real-world conditions.
  • Assumptions: The study makes several assumptions, including the assumption that the DG sources are connected to the distribution system at a single point.

Q: What are the future research directions?

A: Future research directions include:

  • Investigating the impact of DG on transient stability in other distribution systems.
  • Considering the impact of other factors, such as load growth and transmission losses, on system stability.
  • Developing advanced control systems to monitor and control the DG system in real-time.
  • Implementing energy storage systems to provide a buffer against sudden changes in load or generation.