Automatic system for control of overflow reactive in obsolete substations by color petri network modeling (RDP)

This work presents a new approach for the treatment of surplus reactive energy in industrial plants that has capacitor banks in the substation in obsolescence and limited to high numbers of maneuvers. The purpose of this thesis is to perform studies for the purpose of optimizing a discrete distributed system, from data sampled in the industrial sector, which contains problems in the substation power factor control system and consequently reactive energy surplus. In order to propose solutions to these problems, the modeling of the distributed system and the analysis of its properties were carried out through computer simulations. The tool that was used for a discrete system is the Colored Petri Net in CPN TOOLS. From the RDP model we obtain an autonomous decision-making system to connect and disconnect the capacitor banks according to the current of the furnaces, voltage, time of operation of the loads, discharging time of capacitor banks and time of day defined by resolution ANEEL 505, of November 26, 2001 aiming at reaching the power factor close to 1.00 and minimized numbers of high voltage circuit breaker operations. Implementing the model eliminates over reactive, fines, extends the lifetime of circuit breakers, capacitor banks, reduces the exposure of people in circuit breaker maneuvers and does not send noise on the transmission lines of the concessionaire. Completing the development and implementation of the new logical model of the power factor automation system, it was possible to achieve a 96% reduction in excess reactive energy, equivalent to 720,423 kWh per year in energy bills sent by the utility and a reduction of 90.4% number of circuit breaker operations compared to the traditional method of capacitor bank automation. The system also enabled a better structured understanding of the automation logic and assertiveness in the implementation of the system in the industrial controller, not generating interference in the process and rework.