Solcon-IGEL is a developer and manufacturer of soft starters, heat control systems, and motor control and protection solutions for heavy industry. Our power electronic technologies are engineered for reliable operation across a wide range of industrial motor applications worldwide.
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Compressors in Oil & Gas in Vietnam - a double SST multi-start project
Motor Ratings
1.12mW – 9.1mW
Project Overview
Solcon-IGEL, in cooperation with its local partner in Vietnam, successfully completed the installation of a double SST multi-start system consisting of two SST medium voltage soft starters (10 kV, 600 A) and a Medium Voltage Control Panel (MVCP).
The project demonstrated the combined strengths of both partners, integrating local application expertise with advanced soft-starter technology to deliver a reliable motor starting solution.
A key advantage of the system was the ability to operate without the need for a PLC (Programmable Logic Controller), simplifying system architecture while maintaining reliable motor control and protection.
Project Requirements
The system was designed to support a wide motor power range for an industrial installation operating four compressors running in parallel.
The motors varied significantly in size and current requirements:
| Compressor
|
Motor Power
|
Current
|
|---|---|---|
| MAC
|
9.1 MW
|
595 A
|
| BAC
|
5.76 MW
|
—
|
| GOX
|
2.4 MW
|
—
|
| GAN
|
1.12 MW
|
80 A
|
Overall, the system needed to accommodate a current range from 80 A to 595 A, creating significant engineering challenges for motor starting control and parameter configuration.
Engineering Challenges
The wide current range required special parameter configuration within the MVCP switching system to ensure stable operation across all motors.
Additional complexity arose from the largest compressor motor:
MAC Compressor
-
Power: 9.1 MW
-
Current: 595 A
This motor required a longer starting time combined with a high starting current, exceeding typical operating parameters.
Required starting parameters:
-
37 seconds at 4 × FLA
-
Standard nominal values: 30 seconds at 4 × FLC
Where:
-
FLA (Full Load Amps): 595 A
-
FLC (Full Load Current): 600 A
This condition required careful system configuration to ensure reliable motor acceleration without exceeding system limitations.
Solcon-IGEL Solution
Solcon-IGEL engineered a double SST multi-start configuration capable of handling the full range of compressor motors while maintaining system stability.
Key elements of the solution included:
-
2 × SST Medium Voltage Soft Starters – Rating: 10 kV, 600 A
-
MVCP Medium Voltage Control Panel
-
Customized parameter configuration for wide current variation
-
PLC-free system architecture, simplifying integration and reducing system complexity
The design enabled efficient sequential starting of multiple compressors, ensuring stable operation across all motor sizes.
Results
The final system delivered reliable motor starting performance for all compressors despite the wide power and current range.
Key benefits included:
-
Reliable starting of four large compressor motors
-
Capability to handle motor ratings from 1.12 MW to 9.1 MW
-
Stable performance across a current range of 80 A to 595 A
-
Reduced system complexity by eliminating the need for a PLC
-
Efficient coordination of multiple medium voltage motors
The project highlights Solcon-IGEL’s ability to deliver custom engineered medium voltage soft starter solutions for demanding industrial applications.
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