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Optimal sizing and placement of VAR compensators for voltage regulation enhancement against volcanic eruptions in power distribution systems.

Abstract:

Natural hazards are significant threats to the safe and reliable operation of power distribution systems (PDSs). These high impact, low probability events (HILP) often cause severe load losses in PDSs. Therefore, the increase in the resistance of the electrical system seems to be particularly important. This paper proposes a novel methodology to improve voltage regulation in the PDS against volcanic eruptions to enhance the resilience of the system. The proposal evaluates the performance of the PDS under lahars occurrence and their impact on the electrical infrastructure. A stochastic optimization problem is formulated for plan ning VAR compensators to improve the voltage regulation in the PDS after the eruptive event. The methodological framework includes the Monte Carlo simulation (MSC) method and a linearized AC optimal power flow (AC-OPF) model. The benefits and practicability of our proposal are demonstrated on the 37-node IEEE test feeder and in the San Rafael and Salcedo feeders of the concession area of ELEPCO S.A. in Cotopaxi-Ecuador.