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Advanced Compressor Engine Controls to Enhance Operation, Reliability and Integrity
This paper presents results from an investigation into methods to enhance operation of integral engine compressors in gas transmission service through application of advanced controls and sensors. The project is funded by the Department of Energy's (DOE) Office of Fossil Energy and managed by the National Energy Technology Laboratory (NETL) as part of their Natural Gas Infrastructure Reliability Program, with co-funding from Cooper Energy Services (CES). A laboratory GMVH-6 turbocharged engine was utilized to provide baseline data in both open-chamber and pre-combustion chamber configurations. Various 'open-loop' control strategies were evaluated with this dataset to determine the robustness of each. Algorithms for 'closed-loop' feedback and adaptive control were developed to enhance the open-loop strategies for more precise control to improve efficiency and integrity at a given emissions level. As part of this process, several sensors were evaluated for their potential use in commercial systems. Of particular focus was a combined fast-response NOX and universal exhaust gas oxygen (UEGO) sensor.
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