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A placement problem for multiple Battery Energy Storage System (BESS) unitsis formulated towards power system transient voltage stability enhancement inthis paper. The problem is solved by the Cross-Entropy (CE) optimizationmethod. A simulation-based approach is adopted to incorporate higher-orderdynamics and nonlinearities of generators and loads. The objective is tomaximize the voltage stability index, which is set up based on certaingrid-codes. Formulations of the optimization problem are then discussed.Finally, the proposed approach is implemented in MATLAB/DIgSILENT and tested onthe New England 39-Bus system. Results indicate that installing BESS units atthe optimized location can alleviate transient voltage instability issuecompared with the original system with no BESS. The CE placement algorithm isalso compared with the classic PSO (Particle Swarm Optimization) method, andits superiority is demonstrated in terms of fewer iterations for convergencewith better solution qualities.

Optimal Battery Energy Storage Placement for Transient Voltage Stability Enhancement