Security margin increase by voltage stability-oriented emergency power injection

A methodology to locate and size conveniently new power generation in order to rescue the voltage profile in a power system near to voltage collapse is presented in this paper. The analysis is based on the maximization of the voltage of the whole power system at any point within the secure operations limits by using a special Optimal Power Flow that takes into account the orientation provided by the sensitivities generated during the process of optimization. Under this approach, emergency measurements were designed to be implemented in the South-West Power System of the National Grid of Venezuela as part of a short-range plan. The solution showed how the voltage profile in that system is increased by the injection of new power generation that could be provided by emergency plants deployed in few but key points of the network.