Application of contingency analysis methods for power system security and optimization

Sawhney, Ravinder Pal Singh (2004) Application of contingency analysis methods for power system security and optimization. Masters thesis, Memorial University of Newfoundland.

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Abstract

Static security assessment of a power system deals with analyzing the system steady state performance after disturbances. Security assessment is the process whereby any violation of operating limit is detected. Maintaining power system security is a great challenge as power systems are now operated closer to their security limits. In this thesis, contingencies based on active power flow violations using DC power flow based methods are detected and ranked using performance index. The contingencies causing voltage limit violations are determined using sensitivity analysis based approach. These results are then compared with full AC power flow solution. Network reduction technique is used to reduce a larger power system into a smaller system, so that particular part of system could be analyzed with sufficient accuracy and less computational burden. Optimization methods are applied to enhance the overall security of the power system. Different case studies are presented throughout the thesis to illustrate the application of the studied methods.

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