Compressor System Dynamic Control Gain for Load Stability
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Solution Overview
Problem
The existing compressor systems face instability and load distribution challenges when the number of operating compressors changes, leading to transient response degradation, overshoot, and uneven load distribution, requiring continuous adjustment of control gain and information about the number of operating compressors.
Innovation Solution
A compressor system with inlet guide vanes and control units that adjust the degree of opening of the vanes to maintain equal outlet pressures across compressors, using a filter to remove noise and anti-surge valves to prevent surging, ensuring stable operation and even load distribution.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Stability of the object's composition
If the control gain is changed according to the number of operating compressors, then the system can be stabilized, but the transient response characteristic is degraded and overshoot occurs
Solution Approach 1:
The patent applies dynamics by making the control gain variable rather than fixed. The controller dynamically adjusts the control gain based on the number of operating compressors, transitioning from a static control system to a dynamic one that adapts to changing operational conditions, thereby resolving the contradiction between stability and transient response
Solution Approach 2:
The patent changes the control parameter (control gain) according to the operational state (number of compressors). By modifying the control gain parameter dynamically, the system achieves appropriate balance between stability and response speed under different operating conditions
2Productivity
If the control gain decreases when the number of operating compressors decreases, then the system operates with lower gain, but the speed of achieving control objective decreases and normal state error occurs
Solution Approach 1:
The controller dynamically adjusts the control gain based on the number of operating compressors. When compressors are added or removed, the system automatically modifies the gain to maintain optimal control performance, preventing degradation in control speed and accuracy
3Stability of the object's composition
If load equalization command is generated when load difference is a specific value or more, then load distribution is adjusted, but it is difficult for all compressors to maintain the same load at all times
Solution Approach 1:
The patent implements feedback control by continuously monitoring the load distribution among compressors and generating equalization commands based on the actual load differences. This closed-loop feedback mechanism enables the system to maintain load equality more reliably by responding to real-time conditions
Data Source
AI summary
Provided is a compressor system including a first compressor having: an inlet at which a first inlet guide vane is provided; and an outlet pressure sensor unit configured to measure a pressure at an outlet of the first compressor; a second compressor including an inlet at which a second inlet guide vane is provided; a first control unit configured to adjust a degree of opening of the first inlet guide vane based on the pressure measured by the outlet pressure sensor unit, configured to set the outlet pressure of the first compressor as a set pressure, and configured to generate a first signal including information about the degree of opening of the first inlet guide vane; and a second control unit configured to receive the first signal, and configured to adjust a degree of opening of the second inlet guide vane to control an amount of fluid flowing into the second compressor.