Reliability Assessment of Anti-surge Control System in Centrifugal Compressor

2012 ◽  
Author(s):  
Yijing Ren ◽  
Laibin Zhang ◽  
Yingchun Ye ◽  
Wei Liang ◽  
Hedeng Yang
Keyword(s):  
Control System ◽  
Centrifugal Compressor ◽  
Reliability Assessment ◽  
Surge Control

scholarly journals Centrifugal compressor anti-surge control system modelling

2022 ◽  
Vol 12 (2) ◽  
pp. 1419
Author(s):  
Nurlan Batayev ◽  
Batyrbek Suleimenov ◽  
Sagira Batayeva
Keyword(s):  
Control System ◽  
Natural Gas ◽  
Centrifugal Compressor ◽  
Block Diagram ◽  
System Modelling ◽  
Energy Balancing ◽  
Control Block ◽  
Gas Compression ◽  
Surge Control ◽  
Surge Protection

<span>From the middle of XX century, natural gas is an important mineral, widely used in the energy sector. Transportation of natural gas is carried out via gas pipeline networks and compression stations. One of the key features which need to be implemented for any centrifugal gas compressor is a surge protection. This article describes the method and develops software application intended for simulation and study of surge protection system of a centrifugal compressor used in modern gas compression stations. Within the article research method, modelling environment’s block diagram, proposed algorithms and results are described. For surge cases control and prediction, Anti-surge control block implemented which based on practical experience and centrifugal compressor theory. To avoid complicated energy balancing differential equations the volumetric flow calculation algorithm proposed which is used in combination with Redlich-Kwong equation of state. Developed software’s adequacy test performed through modeling of one-stage gas compression scheme at rated speed with comparison of parameters with reference commercial software and verification of the anti-surge control system.</span>

scholarly journals Improvements to a Centrifugal Compressor Surge Control System

1998 ◽  
Author(s):  
Blair J. Martin ◽  
James P. Patrick
Keyword(s):  
Control System ◽  
Centrifugal Compressor ◽  
Control Flow ◽  
Differential Pressure ◽  
Operating Conditions ◽  
Stable Operation ◽  
Time Model ◽  
Process Dynamics ◽  
Discharge Temperature ◽  
Surge Control

A surge control system for a natural gas centrifugal compressor station has been modified in order to reduce shutdowns caused by high discharge temperature and provide a more robust and stable operation. The process consists of a compressor driven by a 14 MW gas turbine and recycle piping, a 16” recycle valve, a PLC based surge control algorithm, a flow measurement element, and a compressor differential pressure transmitter. The control objective is to manipulate the recycle valve to maintain flow through the compressor to a setpoint determined from the differential pressure across the compressor. Field tests were conducted to measure the open loop process dynamics of the valve, piping, compressor and transmitters. From the test data, the relevant process dynamics were determined enabling the development of a first order plus dead time model of the system. The process dynamics are complex due to the gas dynamic effects of the station piping and tend to exhibit inverse and time delayed behavior. Large variations in process gain also create problems with obtaining a consistent flow response under different operating conditions. A stability analysis was completed and the control system was redesigned with several enhancements including derivative control, flow signal filtering, process linearization, and improved controller programming techniques. The results of the modifications are the compressor does not shut down when subjected to transients from other units, the compressor can be started against high head conditions, and the closed loop response time is ten times faster than the previous system. The new system has been in operation since May 1997.

scholarly journals Determination of optimal transient in the anti-surge control system of the gas compressor unit

2014 ◽  
Vol 5 (8(71)) ◽  
pp. 26
Author(s):  
Георгій Никифорович Семенцов ◽  
Андрій Іванович Лагойда
Keyword(s):  
Control System ◽  
Compressor Unit ◽  
Surge Control

Dynamic Model of Multistage Centrifugal Compressor With a Stage-by-Stage Anti-Surge Recirculating System

2021 ◽  
Author(s):  
Nicola Casari ◽  
Michele Pinelli ◽  
Alessio Suman ◽  
Matteo Manganelli ◽  
Mirko Morini ◽  
...  
Keyword(s):  
Centrifugal Compressor ◽  
Pressure Ratio ◽  
Suction Side ◽  
System Level ◽  
Low Flow ◽  
Return Flow ◽  
Control Line ◽  
Compressor Surge ◽  
Surge Control ◽  
Surge Line

Abstract The operability region of a centrifugal compressor is bounded by the low-flow (or high-pressure ratio) limit, commonly referred to as surge. The exact location of the surge line on the map can vary depending on the operating condition and, as a result, a typical Surge Avoidance Line is established at 10% to 15% above the stated flow for the theoretical surge line. The current state of the art of centrifugal compressor surge control is to utilize a global recycle valve to return flow from the discharge side of a centrifugal compressor to the suction side to increase the flow through the compressor and, thus, avoid entering the surge region. This is conventionally handled by defining a compressor surge control line that conservatively assumes that all stages must be kept out of surge at all the time. In compressors with multiple stages, the amount of energy loss is disproportion-ally large since the energy that was added in each stage is lost during system level (or global) recycling. This work proposes an internal stage-wise recycling that provides a much more controlled flow recycling to affect only those stages that may be on the verge of surge. The amount of flow needed for such a scheme will be much smaller than highly conservative global recycling approach. Also, the flow does not leave the compressor casing and therefore does not cross the pressure boundary. Compared to global recycling this inherently has less loss depending upon application and specific of control design.

One-Sided Control of Surge in a Centrifugal Compressor System

2000 ◽  
Author(s):  
Frank Willems ◽  
Bram de Jager
Keyword(s):  
Centrifugal Compressor ◽  
Band Pass Filter ◽  
Pass Filter ◽  
System A ◽  
Operating Region ◽  
Stable Operating ◽  
Surge Control ◽  
Small Band ◽  
Band Pass ◽  
The One

Active surge control is studied in a centrifugal compressor system. To stabilize surge, a bleed valve is applied which is nominally closed and only opens to stabilize the system around the desired operating point. This bleed valve is controlled using a linear output feedback controller based on plenum pressure measurements. In this study, the practical limitations of this one-sided surge controller are examined. Experiments show that the performance of the controller is affected by measurement noise and the desired equilibrium point in the controller, which is not accurately known in the unstable operating region. Fully-developed surge is stabilized with relatively small stationary bleed valve mass flow using the proposed controller in combination with a small band-pass filter. Measurements are compared with the results of the Greitzer model. This model shows qualitative agreement with experiments. For the examined compressor system, a 3.5% extension of the stable operating region is obtained using the one-sided surge controller.

Predictive Surge Control and Optimization for a Centrifugal Compressor

1986 ◽  
Vol 108 (1) ◽  
pp. 82-89 ◽  
Author(s):  
D. Patlovany ◽  
A. B. Focke
Keyword(s):  
Control System ◽  
Supervisory Control ◽  
Control Method ◽  
Energy Costs ◽  
Operating Region ◽  
Stable Operating ◽  
Performance Map ◽  
Surge Control ◽  
Compressor Performance ◽  
Supervisory Control System

This paper details the installation of a retrofit supervisory control system on a large air compressor for the purpose of minimizing energy costs and protecting the compressor from surge. The paper discusses how an accurate prediction of the compressor’s stable operating region can be calculated to develop a compressor performance “map” and how this map can then be used to cut energy consumption by the compressor driver. The compressor is protected from surging by a “predictive” control method. Instead of waiting for the compressor to surge, and then reacting, the system calculates when surge is about to occur and takes action to avoid a surge event before it occurs. The installation of a control system of this type can result in a substantial dollar savings in energy costs, while guaranteeing that a compressor will be protected from any damage from a severe surge event. This system has been installed in our plant and proven in practice. The paper details the installation of this system and its results.

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