Enhancement of transient stability analysis of multimachine power system
- Author Oyediran Oyebode Olumide
- Co-Author Ogunwuyi Ogunmakinde Jimoh, Lawal Akeem Olaide
- DOI
- Country : Nigeria
- Subject : Computer Engineering
Keywords : Bus Voltage, Fault, Field Flux, Generator, Stability, Transient
Abstract
Transient stability is the ability of a power system to maintain synchronism when subjected to a severe disturbance such as fault, loss or addition of a large load, and loss of generation. Unlike small-signal stability, in transient stability a large-signal disturbance is considered. Therefor nonlinear differential equations of the system should be employed to represent the system. The methodology used is the modification of Newton Raphson for performing the load flow analysis of the bus system. Stable operations of a power system depends on the ability of system generators to meet active and reactive power demand of the loads. As a result, it is important to accurately represent the load to capture the dependence of it real and reactive power on the system variables, e.g bus voltage. Therefore, load modelling plays an important role in transient stability analysis. In this work, a software tool is developed to implement the simulation algorithm in MATLAB 8.1. The software is capable of representing several load and generator models and can handle the PSS/E native file format. Evaluation of result was done based on the Delta angle of generators , Speed deviation of generators, Field circuit flux of generators, Bus voltages and Internal delta angles with respect to time.
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