Power System Blockset

Introduction

Traditionally, stabilization of power systems was ensured by linear regulators such as the automatic voltage regulator (AVR), the speed governor, or the power system stabilizer (PSS). These compensators assume a linearized model of the power system around an operating point.

The demand for improved performance has created the need to operate power systems closer to the limits and therefore well outside the linear domain. Nonlinearities begin to have a significant effect then, especially after important disturbances that lead to a large variation of the operating point.

This case study will allow you to step through the design of a nonlinear controller that takes into account all the nonlinearities of the model. The objectives of the controller are to regulate both the terminal voltage and the internal power angle. The control inputs are the field excitation voltage and the gate opening of the turbine.

Synchronous Machine and Regulators

Mathematical Model