Resumo:
High Voltage Direct Current (HVDC) technology plays a crucial role in
integrating renewable energy and optimizing power flows in modern electrical
grids. This study develops an advanced optimization framework to
minimize power losses in systems with embedded HVDC links while also
addressing the challenges posed by loop flow interactions. First, a novel
method for identifying and analyzing loop flow scenarios is proposed,
utilizing a modified Dijkstra algorithm to efficiently detect critical loop
paths in large-scale meshed networks. This approach simplifies the analysis
for system operators, enabling more effective mitigation of undesired
power circulations. Building upon these findings, the study further formulates
an optimization problem that dynamically adjusts HVDC power
injections to minimize transmission losses, particularly during power redistribution
events caused by renewable generation fluctuations. The
methodology considers system conditions such as load variations and
transmission network reconfigurations, ensuring robust performance under
different operating scenarios. Simulations on the Brazilian 107-Bus
and IEEE 57-Bus test systems validate the framework’s effectiveness,
demonstrating significant reductions in power losses and improved grid
efficiency. The findings provide system operators with a comprehensive
tool for optimizing HVDC operation, mitigating loop flow issues, and
enhancing the secure integration of renewable energy into the power system.
