Abstract
The development of subsea all-electric Christmas trees is an area of focus in the offshore oil industry worldwide. The main difficulties are associated with the development and control strategies for subsea all-electric actuators, which are the most critical components of subsea Christmas trees. A single-motor-level fuzzy PID control with an integrated working condition detection module and a three-motor redundant-level deviation strategy with coupled joint synchronous control were proposed in this paper to realize the real time determination of algorithm parameters according to the working conditions, solve the rapid redistribution problems, and maintain the fast speed of the servo motor of the subsea all-electric tree valve actuator. A synchronous control electrical system was built, tested, and verified through simulation analysis. Test results show that the two redundant servo motors can still control the all-electric valve actuator and provide good synchronization control capabilities despite the failure of one servo motor, and the vertical and horizontal vibration values of the system are within reasonable ranges. The synchronous control strategy can be applied to the synchronous control problem of subsea all-electric production systems, which is of considerable importance for the development of subsea all-electric production systems.
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Acknowledgements
The authors wish to acknowledge the financial support of the Shandong Provincial Natural Science Foundation (No. ZR2021QE059), the National Natural Science Foundation of China (No. 51974169), and the Key R&D Program of Shandong Province (No. 2019GGX101020).
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Liu, P., Shen, D., Ba, Y. et al. Development and Control Strategy of Subsea All-Electric Actuators. J. Ocean Univ. China 21, 1133–1146 (2022). https://doi.org/10.1007/s11802-022-4928-z
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DOI: https://doi.org/10.1007/s11802-022-4928-z