Generator-fed transmission system

System

In certain situations, e.g. when supplying remote areas or islands, a wide area synchronous grid is not feasible at all. Also, some industrial plants generate the electrical energy they need themselves and only draw power from the grid in the event of a fault.

In this experiment, an off-grid system consisting of a synchronous generator and a transmission line model is investigated under different types of load. The stand-alone system is not connected to other power sources.

Resistive, inductive and capacitive loads are used as consumers. The most common case of a mixed resistive-inductive load is studied separately, with and without parallel compensation.

Learning objectives

• Behaviour of a generator-fed off grid system
• Influence of the generator voltage control
• Analysis of the system with resistive, inductive, and capacitive load and combinations of R, L and C

The student should learn to understand the behaviour of a generator and of transmission lines through measurement and evaluation.

Target groups

Pupils in vocational training in power engineering. Training in the field of power plant technology in industry. Students in general electrical engineering and power engineering. Levels up to a bachelor's degree.

Knowledge of three-phase or alternating current technology is a prerequisite.

Topics

• Influence of the generator voltage control
• Investigation of the voltage levels before and after the transmission line in dependency of the load
• Investigation of the reactive power output as a function of the load
• Reactive power compensation
• Characteristics of transmission lines under load