Diseño e instalación de un sistema de control, supervisión y monitoreo para la compuerta de restitución tipo vagón de la Central Hidroeléctrica San Francisco mediante el uso de un PLC de una interfaz humano – máquina.

Abstract

A control, supervision and monitoring system was developed for the fixed wheel floodgate at the San Francisco Hydroelectric Power Station, through the use of a Programmable Logic Controller (PLC) and a Human Machine Interface (HMI) that allows the outflow of turbine water from the two generation units and in turn prevents the entry of water from the Pastaza river when the plant is out of service. The floodgate has an automatic control panel that allows for the manual operation of the gate for opening, normal closure and emergency closure. This panel is controlled via a SIEMENS PLC, model S7-1200, CPU 1212C DC/DC/RLY and a SIEMENS HMI, model KTP-900, which communicate via ETHERNET protocol. In order to improve the control system, piping and instrumentation (P&ID) diagrams were drawn up, the electrical and electronic plans were modified, and new devices and interfaces were installed according to the company’s requirements. Tests were carried out at each of the gate’s stages in the new control system via the SIEMENS software simulator in the testing panel for its later implementation in the tunnel, thus verifying the technical data delivered with the project construction with those obtained in the project through HMI monitoring and supervision. As a result it was concluded that the new control system for the floodgate guarantees an increase in reliability and a reduction in the number of failures. More regular routine maintenance is recommended for the floodgate control system in order to monitor the correct operation of the electrical devices, sensors and actuators that make it up the system.