Computing the maximum loading point in power systems based on load flow with step size optimization

Author(s)

Beatriz de Lima Tavares

• Document type: Master's Dissertation
• Press: Campinas, SP.
• Institution: Universidade Estadual de Campinas (UNICAMP). Faculdade de Engenharia Elétrica e de Computação
• Defense date: 2010-06-21

Examining board members

Carlos Alberto de Castro Junior; Luiz Cláudio de Araújo Ferreira; Luiz Carlos Pereira da Silva

• Advisor: Manfred Fritz Bedriñana; Carlos Alberto de Castro Junior

Abstract

In this paper, two maximum loading point (MLP) calculation methods are proposed. In both cases, the calculation process is based on the properties of the normal vector to the feasibility boundary computed close to MLP, which is calculated by a load flow method with step size optimization (LFSSO). In the first method the process is characterized by obtaining consecutive approximations of the MLP from the infeasible region. Since the feasibility boundary contour in the neighborhood of the MLP may not be smooth, some of the computed points may fall within the feasible region. In this case, a new load factor calculation method that guarantees that the next solution will lay within the infeasibility region is the main contribution. The second one is a practical and fast method to obtain the MLP, where a practical procedure is added to the overall calculation process to include the operator's information on the acceptable error in the final result. The MLP is accurately obtained after just a few steps, demonstrating the efficiency of the proposed method. Simulation results for IEEE test and realistic systems are shown to validate both proposed methods (AU)

• FAPESP's process: 08/07369-1 - Power systems maximum loading point calculation using load flow with step size optimization
• Grantee: Beatriz de Lima Tavares
• Support Opportunities: Scholarships in Brazil - Master