H - Electricity – 03 – L
Patent
H - Electricity
03
L
H03L 7/08 (2006.01) G01R 21/00 (2006.01) G01R 23/00 (2006.01) H02H 3/26 (2006.01) H02J 3/00 (2006.01)
Patent
CA 2464836
This document discloses a novel system for detection and extraction of useful signals for analysis, design, control, and protection of power systems as well as for power quality purposes. The proposed system is based on generalization of the concept of Enhanced Phase-Locked Loop (EPLL) system. The EPLL and one of its extensions are first outlined. It is observed that this extension is not direct and some redundancies are present in its structure which make the system have long transient responses. A new generalization of the EPLL to three-phase is presented in this report as the most integral extension of the EPLL with no redundancy of structural components. Having a structure as simple as consisting of nine state-variables (nine integrators); the proposed structure receives a three-phase set of signals and provides (1) instantaneous positive-, negative-, and zero-sequence components; (2) steady-state sequence- components. (3) fundamental components; (4) harmonics, (5) amplitudes, (6) phase angles, and (7) frequency. This three-phase EPLL system can certainly be a building block for almost all of the signal processing requirements encountered in the context of power system applications. Examples are Flexible AC Transmission Systems (FACTS) and Custom Power Controllers. Active Power Filter (APF), Static Compensator (STATCOM), and various versions of Power Flow Controller (PFC) system are specific examples in this category. Particularly, the developed system can be employed as an integral part of the control system of the fast. growing technologies of distributed generation systems and renewable energy sources. This is due to the presence of frequency recursions and distortions encountered in these systems which conventional strategies for their control fail to cope with them. The proposed system can equally be used as a basic part of the power quality measurement and monitoring systems which will furnish them with unique features due to its capabilities. Some typical behaviors of the system are shown using computer simulations in this report. However, extensive work must be carried out to investigate performance of the system in various application areas.
Karimi Ghartemani Masoud M. K.
Na
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