Voltage Stability Of Power Network Research Articles

A novel optimal allocation of STATCOM to enhance voltage stability in power networks

Utilizing a static synchronous compensator (STATCOM) in the electrical power grid greatly improves the grid's voltage profile by enhancing voltage stability. This article proposes a novel approach based on Mixed Integer Distributed Ant Colony Optimization (MIDACO) to determine the optimal STATCOM installation in the electrical power grid. This approach has two control variables to optimize: the STATCOM size and location. This optimization aims to enhance voltage stability with minimum cost by minimizing two objectives: the voltage deviation index and the STATCOM cost. Also, this article presents a sensitivity analysis to show the stochastic nature of MIDACO and to explain the effect of MIDACO parameters on the optimization approach and the process of reaching the optimal solution. The proposed method has been evaluated on three standard test systems: IEEE 14-bus, IEEE 57-bus, and IEEE 118-bus. In addition, the MIDACO results are compared to those of the artificial bee colony algorithm, the genetic algorithm, and particle swarm optimization.

A multiobjective approach for reactive power planning in networks with wind power generation

The increase in wind energy penetration is creating a wide range of technical problems in power networks. Reactive Power Planning is one of these crucial issues which entails all the necessary planning actions to improve the voltage profile as well as the voltage stability in power networks. On the whole, the ultimate aim in reactive power planning could be addressed as the resolution of an optimization problem, in which multiobjective optimization techniques emerge as good alternatives to fulfil several goals simultaneously. Among all these techniques above mentioned, genetic algorithms stand out because of their speed of calculation and simplicity. An existing 140-bus power system is used to validate the performance and effectiveness of the proposed method where several wind farms and FACTS units are optimally located.