Power Generation and Electrical Network Modeling

Electrical energy is one of the essential energy carriers in energy management. It is becoming more and more important in new applications allowing to reduce the carbon footprint, for example in electric propulsion. Electrical energy is produced by high power production (thermal power plants) but also by more and more intermittent sources due to renewable energies (photovoltaic, wind power...). This electrical energy produced must be transported and distributed and the global management of the transport and distribution networks is a major constraint.

This unit of instruction will:

• To provide theoretical knowledge of modeling of the elements of production, transport and distribution of electrical energy.
• To define the three-phase sinusoidal regime, the quality of electrical energy and the study of unbalanced networks by symmetrical components.
• To allow the implementation of the modeling of transformers, inductive elements (neutral point coil...), synchronous alternators and asynchronous generators. It will give the experimental methods of characterization of these elements.
• To give the conditions of connection of the generators to the electric networks, the setting in parallel and the associated adjustments.
• To allow the establishment of models for lines and cables for electrical distribution. It will give notions of power management, of the impact of short-circuit in high power networks. The use of network software will illustrate the phenomena.

The objective of this teaching unit is that the student, at the end of this course, consisting of hours of lectures and practical work, knows how to model and characterize the elements of production and of the networks of transport and distribution of electrical energy.

The student should be able to study a problem involving sinusoidal sources and electrical loads in transient or steady state modes of operation.

The student should be able to make or study test sheets for a transformer, a synchronous alternator or an asynchronous generator.

The student will have to know how to use a network simulation software to study the management, the transit of power and the impact of short circuits.

Bachelor's degree in EEA or science and technology with lessons on the basic principles of electrical engineering (sinusoidal regime, transformer ...).

To have knowledge of the elementary notions of mathematical tools for the study of the sinusoidal regime (complex calculations, Fresnel representation, trigonometry.).

Have knowledge of the basic principles of the operation of electrical machines.

Continuous assessment for the course and the practical work.

Percentage of 70% for the course and 30% for the practical part

1. Sinusoidal regime - Reminders. Transient and steady state. Balanced and unbalanced regime. Power. Non-linear load. Harmonics. Symmetrical components: definitions, use. Reduced units.
2. Modeling of a three-phase transformer. Model with inductances. Complex hourly index. Transformer tests - Equivalent diagram. Network coupling - Parallel coupling. Inductive elements of a network (neutral point coil...)
3. Modeling of synchronous alternators. Introduction: presentation. Behn-Eschenburg model. Potiers model. Blondel model with two reactances. PQ diagram of an alternator. Identification of an alternator. Coupling to the grid - Parallel connection - Adjustments.
4. Modeling of an asynchronous generator. Production principle of an asynchronous generator. Operation on isolated network (islanded). Identification of an asynchronous generator. Coupling to the network.
5. Modeling of lines and cables. Modeling of electrical networks. Quality of electrical networks. Reactive energy management. PowerFlow - Short circuit management.

CM : 30h

TP : 21h