Devising an Electric Power System: A CDIO Approach Applied to Electrical Engineering

Abstract

The study of electric power systems within the field of Electrical Engineering is usually approached by computer simulations because any actual test is quite complex to be implemented. Having the aim to improve student learning about this topic, a new subject called “Devising an Electric Power System” was organized following a CDIO (Conceive-Design- Implement-Operate) approach. The subject is programmed for one academic year and based entirely on laboratory work. The students are divided into three groups. Every group would have to work on a device that includes a solar PV generator and a pumping controlled drive, both connected to a three–phase grid. The process followed by the students along the academic year begins with a short theoretical introduction and simulation studies where they conceive and design control strategies. These control strategies are for the solar PV generator (i.e., programing the “Maximum Power Point Tracking” MPPT) as well as for the pumping electric drive (i.e., following a V/f strategy or a vector control). The process is continued by practical implementation of the simulated algorithms previously obtained. In this step, the students implement and operate the systems until they become robust and well adjusted, and ready for the intermediate partial competition among the three groups. During this practical implementation stage, the innovative competence is better enhanced. At the moment that each group has implemented an electric generator and an electric consumption (load), they follow the third and last part of the subject that is focused on “electric utility” business strategy. The students will have to comply with the rules of the electricity market by offering energy packages to be generated and consumed at a certain price. The price and volume of energy to be generated/consumed are determined by the convergence point of supply and demand, as determined by the marginal pricing model. Once the market is cleared, the students have to realize their generation/consumption commitments by operating the real power system they have conceived and implemented. After the first academic year of this subject, the students’ evaluation was highly acceptable. The specific technological contents of the subject were learnt by the method called “learning by doing” that allows students to improve their skills in team building, innovation and communications. In addition, a good work atmosphere among students and teachers has arisen.