ABSTRACT
This Ph.D work focuses on systems of electric power measures based on the theory of electric power defined by the IEEE Std.1459-2000, in three-phase four-wire systems. In this Ph.D is developed a measurement system based on this theory, to measure each of the terms proposed in IEEE Std.1459-2000 that represent the different electrical phenomena efficient and inefficient that can occur in such systems.
In this Ph.D is performed a review of the theories of electric power is more recent and detailed analysis of the theory of electric power defined in IEEE Std.1459 for various types of electrical systems. Will the proposed of the power unbalance defined in the IEEE Std.1459-2000, leading to some new terms that quantify independently the unbalance caused by the users (unbalanced loads) and the unbalance due to voltages. Also included are some factors of merit to quantify each of these unbalances, which can be included in the measurement equipment based on this theory to measure or penalize users
To develop the system of measures, is proposed in this Ph.D the use of a synchronization system able to sync with the fundamental harmonic and direct sequence of voltages. The synchronization system comprises: a bandpass filter (SOGI), a system for obtaining direct sequence (DSC) and a SPLL (PLL software).
The analysis of each of the subsystems (synchronization system and measurement system) that comprising the system of measures is presented. The synchronization system is responsible to synchronize with the direct sequence fundamental harmonic of voltages, before any perturbation of voltages, making it a robust subsystem synchronization. The measurement system is responsible for performing all calculations necessary to carry out the measures of the terms defined in IEEE Std.1459-2000, where from the voltages and currents sampled at the point of connection, are conducted all operations for the terms defined in this standard and those proposed in this Ph.D.
For viewing the terms as measured by the proposed measurement system is developed in Visual Basic.NET a monitor system, which through a PC can display and store all the measured variables.
The results of simulation and experimental measurement system designed for different types of loads and supply conditions. Also, a comparison of the measurement system developed in this thesis and a system of trade measures for different conditions of supply voltage and load currents.
Finally, it includes the conclusions, contributions, future lines of work and publications derived from the results of Ph.D research.