3-phase grid connected Voltage Source Converters (VSC) play an important role in integrating renewable energy, storage or acting as a front-end converter for motor drive applications. Designing of closed loop controllers for VSC are necessary for proper coordination and smooth exchange of active and reactive power with the grid. In this tutorial, step-by-step design of the controller will be undertaken taking help of small signal model of the converter. Controller tuning will be realized by analyzing Bode plots of transfer function. One design example supported by simulation will be shown for better understanding and helping the audience to develop the VSC model and the controller on their own.