Hybrid modeling of asymmetrical power system and three-phase power flow method

作者：Huang Shaowei^*; Chen Ying; Shen Chen

来源：Automation of Electric Power Systems, 2011, 35(14): 68-73.

• Asymmetry system
• Coordination algorithms
• Different sizes
• Fault calculation
• Hybrid approach
• Hybrid modeling
• IEEE standards
• Low sensitivity
• Phase component
• Power flow calculations
• Power flows
• Real systems
• Symmetrical component method
• Symmetrical components
• System unbalance
• Test results
• Three-phase power flow
• Three-phase power-flow methods
• Transmission systems
• Unbalanced loads
• Voltage distribution system

Because of the existence of asymmetrical parameters and unbalanced loads, a power system may operate in an unbalanced state even if there is no fault in the system. A new three-phase power-flow method for asymmetrical power systems power flow calculation is presented. This method uses a hybrid approach with symmetrical components and phase components to model the system, and solves the power flow through decomposition and coordination algorithms. The algorithm proposed combines the flexibility of phase component method and the efficiency of symmetrical component method. It is suitable for power flow and fault calculation of transmission systems as well as high/medium voltage distribution systems. Three IEEE standard systems with different size and a real system are used for case study. Test results show that the method proposed has high accuracy and convergence, and has low sensitivity to the system unbalance. ? 2011 State Grid Electric Power Research Institute Press.

• 出版日期2011
• 单位清华大学