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Surge Control System by Solar Turbines

1. SOLAR SURGE
CONTROL SYSTEM
Solar Turbines

2. Caterpillar: Confidential Green
Solar Surge Control System
•Integrated system –Controller, Logix and Functional Block
•Surge Control Model
•HEAD, % = Function (Pressure ratio, Temperature Ratio
•FLOW, % = Function (flow DP, Suction Pressure)

3. Caterpillar: Confidential Green
Solar Surge Control System

4. Caterpillar: Confidential Green
SURGE REPORT
Surge Line = aX
3
+ bX
2
+ cX+ d
Control Line
Dead-band Line
Surge Pulse
ASV Close Rate

5. Caterpillar: Confidential Green
0
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HEAD, %
FLOW, %
2%
10%

6. Caterpillar: Confidential Green
0
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HEAD, %
FLOW, %
Operation
•Surge Margin > 12%
•Anti Surge Valve Position < 100%
Close
▪Controller command the
ASV to close.
•Allow Manual Mode of ASV

7. Caterpillar: Confidential Green
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HEAD, %
FLOW, %
Operation
•Surge Margin < 12% & > 10%
•Controller command the ASV to
stay last position.
•HOLD position
•Manual Mode turn to AUTO
Mode

8. Caterpillar: Confidential Green
0
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0 20 40 60 80 100
HEAD, %
FLOW, %
Operation
•Surge Margin < 10%
•Controller command the ASV to
Open

9. Caterpillar: Confidential Green
SURGE PROTECTION
•Anti Surge Control
▪Command the ASV
▪Avoid compressor from operating near surge
•Pulse
▪Measuring Rate of Change
▪Every pulse open ASV by 15%
▪Shutdown if 5 pulses in 10 seconds
•Vibration: Axial and radial
•Shutdown if positional or transmitter failure
Flow, DP
1s
103.05 in H20

10. Caterpillar: Confidential Green
FOCUS of Safety for Surge Control System
•Controller
▪RefertoSB-5.13.2/175.Solarwillbemigratingall
programmingplatformstotheWindows®1064-bit
operatingsystem.Versions16,20,and30isWindows10
64-bitcompatible.
•HMI
▪Refer to SB-5.13.2/195. With the upcoming introduction of
Windows 10, Solar® has determined that continued support
of TT4000 V3.5 is not viable. The HMI can be upgraded to
the latest display hardware.
•Positioner
▪SVI
•Training
▪CentrifugalCompressorPerformanceandCondition
Evaluation