Esquema automático de deslastre de carga para sistemas eléctricos que sirven al sector petrolero.

Abstract

Maintaining the frequency of an Electric Power System (EPS) at acceptable operating values is of vital importance to avoid the blackout of EPS, the value of the frequency depends on the balance generation - load, as there is more load than generation, the frequency decreases and vice versa if there is more generation than load the frequency increases. This work focuses on the case that the load is greater than the generation and the frequency decreases, to mitigate this phenomenon an Under-Frequency Load Shedding scheme (UFLS) is used, for which a methodology is presented for the design of the UFLS with which avoids the collapse by frequency of the EPS due to the generation - load unbalance. First, information will be collected from the electrical system under study to model it in the ETAP software, with this model dynamic simulations will be carried out in the time domain for later comparison with the real data obtained from a SCADA system, with this model it will perform dynamic simulations of all possible generation output scenarios with which they will be ordered from the most severe to the mildest. Then, the priority of loads to be disconnected will be defined for all the scenarios with which simulations will be carried out for the analysis of the frequency response of each scenario with different parameter values such as frequency limit [% Hz] or by [df / dt]. Finally, all the frequency responses of each scenario will be analyzed to define the UFLS for that scenario. This methodology will be applied to an isolated electrical system serving an oil and gas block.