Filtros activos de potencia para la compensación instantánea de armónicos y energía reactiva.
Since the last quarter of the last century, and due to the spectacular increment of the connection of electronic loads to the electric system, it has been extraordinarily increased the existence of non-sinusoidal currents with high content of harmonics. This fact, in comparison to our environment, i...
| Autor: | |
|---|---|
| Tipo de recurso: | tesis doctoral |
| Estado: | Versión publicada |
| Fecha de publicación: | 2006 |
| País: | España |
| Institución: | CBUC, CESCA |
| Repositorio: | TDR. Tesis Doctorales en Red |
| OAI Identifier: | oai:www.tdx.cat:10803/6306 |
| Acceso en línea: | http://www.tdx.cat/TDX-1102106-104651 http://hdl.handle.net/10803/6306 https://dx.doi.org/10.5821/dissertation-2117-93618 |
| Access Level: | acceso abierto |
| Palabra clave: | armonicos calidad de la energia electrica potencia activa y reactiva instantanea energia reactiva filtros activos de potencia 621.3 |
| Sumario: | Since the last quarter of the last century, and due to the spectacular increment of the connection of electronic loads to the electric system, it has been extraordinarily increased the existence of non-sinusoidal currents with high content of harmonics. This fact, in comparison to our environment, is named "electric pollution".<br/>The presence of these electronic loads is given in all power levels, from hundreds of VA until some MVA and, although the problem is increased with the installed power, it is not negligible the effect achieved by the accumulation of many loads of small power. Due to this fact specific power quality standards have been imposed.<br/>The conventional filter techniques, based on passive filters installation tuned at the supposed harmonics in the plant, became inadequate due to the variability in the value and content of the same ones throughout the time. <br/>The present PhD thesis is dedicated to the study of the current techniques for the elimination of those harmonics, and also the conventional reactive energy, by means of Active Power Filters based on the use of static power converters and specific control algorithms.<br/>After exposing the mains theories on the instantaneous power in the electric systems, and their application to the compensation techniques of harmonic and reactive energy by means of Active Power Filters, improvements are contributed in the application of those theories consistent in the simplification of the same ones based on the exclusive consideration of the active instantaneous power, as a really physical concept and easily measurable.<br/>In particular it is considered of special interest, for their simplicity and excellent results, the so called Simplified General Theory of the Instantaneous Power. This theory is applicable to one-phase as well as three-phase systems with or without neutral conductor.<br/>Analogical and digital prototypes of control have been built, based on the exposed theories, with experimental results that confirm the validity of the same ones.<br/>An industrial prototype of a Active Power Filter of 40kVA of compensation power has also been built, whose control is based in Simplified General Theory of the Instantaneous Power, and experimental results in laboratory demonstrate the excellent behaviour even with electronics loads whose Total Harmonic Distortion of current (THDi) exceeds 70%. This THDi is reduced below values of 5%. |
|---|