Application of D-STATCOM to mitigate high inrush current during start-up of three-phase induction motor
This thesis presents the application of Distribution Static Compensator (D-STATCOM) to mitigate inrush current during start up three phase induction motor. Three phase induction motor draws high current during starting period and will from 6 to 7 times of the rated current of the motor. The effect...
Saved in:
| Main Author: | |
|---|---|
| Format: | Thesis |
| Language: | English |
| Subjects: | |
| Online Access: | http://dspace.unimap.edu.my:80/xmlui/bitstream/123456789/61545/1/Page%201-24.pdf http://dspace.unimap.edu.my:80/xmlui/bitstream/123456789/61545/2/Full%20text.pdf |
| Tags: |
Add Tag
No Tags, Be the first to tag this record!
|
| Summary: | This thesis presents the application of Distribution Static Compensator (D-STATCOM) to mitigate inrush current during start up three phase induction motor. Three phase induction motor draws high current during starting period and will from 6 to 7 times of
the rated current of the motor. The effect of high starting current will cause severe
damage to motor itself, especially overheating and making motor life expectancy short.
In addition, the high starting current will cause the voltage of the power supply rapid
drop and affect other devices’ running in the same power line. The purpose of this thesis
is to demonstrate that a D-STATCOM is capable to mitigate inrush starting current
during start up induction motor. The controller circuit of D-STATCOM has been
simulated by using Power System Computer Aided Design (PSCAD/EMTDC)
software. The research methodology of this project is to design D-STATCOM circuit
which consists of Voltage Source Converter as a main circuit. The function of this
circuit is to convert AC to DC and then invert DC to AC before transmit to the threephase
power line. The circuit’s has a capability to absorb and inject the reactive and
active of the power system which is to control the magnitude of the VSC output voltage.
To compare the capability of the D-STATCOM, a Soft starter is developed. The Soft
starter circuit is controlled by six thyristors. There were three methods which can be
used such as starting the induction motor with direct start-up, starting the induction
motor by connecting with the D-STACOM and starting the induction motor with Soft
starter. The starting currents of these three methods were observed up to 30
milliseconds and compared. The analysis result shows that the D-STATCOM had
mitigated inrush current during start-up induction motor up to 74% higher compared to
direct start-up and 164 Ampere is the highest inrush current recorded while direct startup
was 637 Ampere recorded. The D-STATCOM was compared with Soft starter to
determine the ability of reducing inrush current during start-up induction motor. The
result shows that the D-STATCOM had mitigated of 54.3% higher inrush current
compared with Soft starter. Hence, the conclusion of this research is the D-STATCOM
has a higher capability to reduce inrush current during start up the induction motor
compared with Soft starter. |
|---|