Abstract
A whale optimization algorithm (WOA)-based power system stabilizer (PSS) design methodology on modified single machine infinite bus (MSMIB) and multi-machine systems to enhance the small-signal stability (SSS) of the power system is presented. The PSS design methodology is implemented using an eigenvalue (EV)-based objective function. The performance of the WOA is tested with several CEC14 and CEC17 test functions to investigate its potential in optimizing the complex mathematical equations. The New England 10-generator 39-bus system and the MSMIB system operating at various loading conditions are considered as the test systems to examine the proposed method. Extensive simulation results are obtained which validate the effectiveness of the proposed WOA method when compared with other algorithms.
Highlights
It is well-known that a power system is a practical example of a highly non-linear interconnected system formed by a number of transmission lines, switchgear equipment, various generators with diversified configurations, and a variety of loads
The Power System Stabilizer (PSS) designed on the Modified Heffron Phillips (MHP) model is considered as Modified power system stabilizer (MPSS) and on the multi-machine system is considered as PSS
It starts with the initialization of the PSS parameters with their minimum and maximum values, and leads to the generation of initial solutions, determination of the objective function, optimization of the PSS parameters according to the mechanisms mentioned above, and stopping criteria of the algorithm when the number of generations is completed
Summary
It is well-known that a power system is a practical example of a highly non-linear interconnected system formed by a number of transmission lines, switchgear equipment, various generators with diversified configurations, and a variety of loads. Some drawbacks and limitations have been observed including lack of fast convergence, the need for large numbers of design parameters, and not maintaining a good balance between the exploitation and exploration stages. To address these issues, a Whale Optimization Algorithm (WOA) is implemented in this paper on single machine and large scale multi-machine systems to design the PSS parameters. The first test case is the recently developed MSMIB system which is the modified version of the SMIB system This takes the transformer secondary bus voltage of the generator side, instead of an infinite bus voltage.
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