28-07-2012, 04:09 PM
SIMPLIFIED CONTROL METHOD FOR UNIFIED POWER QUALITY CONDITIONER (UPQC)
Original SIMPLIFIED CONTROL METHOD FOR UNIFIED POWER QUALITY.ppt (Size: 3.21 MB / Downloads: 59)
ABSTRACT:
One of the serious problems in electrical systems is the increasing number of electronic components of devices that are used by industry as well as residences. at the same time, are the most responsible ones for injections of harmonics in the distribution system. Therefore, devices that soften this drawback have been developed. One of them is the unified power quality conditioner (UPQC)
A UPQC is employed in a power transmission system to perform shunt and series compensation at the same time
OPTOCOUPLER
Optocoupler use a beam of light to transmit the signals or data across an electrical barrier, and achieve excellent isolation.
Optocoupler typically come in a small 6-pin or 8-pin IC package, but are essentially a combination of two distinct devices an optical transmitter LED (light-emitting diode) and an optical receiver such as a phototransistor or light-triggered diac.
STATCOM (Static Synchronous Compensator)
The Static Compensator (STATCOM) uses a VSC interfaced in shunt to a transmission line. In most cases the DC voltage support for the VSC will be provided by the DC capacitor of relatively small energy storage capability
A STATCOM is operated as a functional equivalent of a static VAR compensator; it provides faster control than an SVC and improved control range.
Transformer for PIC and Driver for Supply Input
Type: Step-down Transformer
Primary: 230V a.c
Secondary: 12v a.c
Current Ratings: 500mA
HARDWARE USED
PIC Microcontroller PIC16F877A
Optocoupler Circuit MCT2E
Power Supply Unit
Filtering Circuit
Converter Circuit (SSSC and STATCOM)
Driver Unit
Load