ADGAS implemented Advanced Process Control Solution (APC) for LNG Plant with intent to Increase throughput while respecting all the constraints required for ensuring integrity and reliability of its assets. It is also helping us to improve efficiency, reduce emissions and also to reduce operator stress by substantially reducing operator interventions required.

Model based predictive control is used in implementation of APC. Overall structure of controller includes 5 controllers which are optimized by overall controller using QP technique.

This types of implementation is not so uncommon in industry today, however, at ADGAS we had some peculiar challenges which were eventually overcome using innovative solutions

  • MR Composition Control

  • MR Optimization

  • Need for Robust Inferential structure

  • Tackle impact of gas drier change over on upstream and downstream plant

Keywords:
LNG, controller, operator stress, Implementation, apc controller, gas monetization, concentration, drier changeover, operator, Upstream Oil & Gas
Subjects:
Natural Gas Conversion and Storage, Liquified natural gas (LNG)
Copyright 2015, Society of Petroleum Engineers
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