Diseño y construcción de un sistema automático de regulación de velocidad del grupo motor DC-generador sincrónico de 10 hp del laboratorio físico de Sistemas Eléctricos de Potencia.

Abstract

The main objective of the project is the design, construction and commissioning of the speed regulator module (GOV) of the synchronous DC motor-generator group. The GOV is a set of electrical and electronic components that regulate the angular speed of rotation by controlling the supply voltage of the armature of the prime mover.

The GOV has two stages in its operation, the control stage performs the armature voltage adjustment and the power stage, formed by the field and armature rectifiers, feeds the driving machine.

The control stage uses a PI type controller on the STM32F407 microcontroller card, which performs the tasks related to speed measurement through encoder, armature voltage regulation, voltage limitation, current and protections.

The power stage is composed of a controlled three-phase rectifier that supplies the armature and a two-phase uncontrolled rectifier that supplies the motor field. Both rectifiers contain SCRs as power elements.

The GOV module has a graphical interface that allows the choice of the simulation mode for the turbine: hydraulic, steam or gas. The interface allows viewing the data of speed, voltage, armature current of the driving machine, it also shows the status of the GOV protections.

The tests to verify the operation of the GOV are: start-up, shutdown of the motor-generator group, connection of the load module, paralleling with the EEQ network and the photovoltaic generator.