Subsea Power Systems - a Key Enabler for Subsea Processing

Midttveit, Steinar; Monsen, Bjarne; Frydenlund, Snorre; Stenevik, Karl

doi:10.2523/20621-ms

Cited by 5 publications

(1 citation statement)

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“…This system configuration has already been successfully applied to several field developments, such as the Lufeng field in Hong Kong and Tordis in the North Sea. Supplementary examples and electrical component ratings are provided in [12]. However, it is limited to shorter distances (e.g., up to 50 km).…”

Section: A Conventional Hvacmentioning

confidence: 99%

A Modular Stacked DC Transmission and Distribution System for Long Distance Subsea Applications

Song-Manguelle

Todorovic²,

Gupta³

et al. 2014

IEEE Trans. on Ind. Applicat.

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A new power transmission and distribution concept-modular stacked direct current (dc) (MSDC)architecture is described. Its main application is subsea oil and gas (O&G) processing, where the marinization of system components, their reliability and retrieval are the most critical requirements. In contrast to conventional HVDC systems, the proposed MSDC technology achieves the required dc transmission voltage by stacking a number of power converter building blocks in series that are easy to marinize. Since each building block is similar to a standard variable frequency drive, the MSDC technology has potentially much lower cost and higher reliability. Moreover, the modular architecture renders the system fault tolerant and capable of operating in a degraded mode. The architecture is also highly reconfigurable as the field matures and the loads evolve over time. A generic subsea field scenario for O&G has been designed and analyzed. The MSDC architecture and associated system control strategy are developed and tested using a real-time simulation platform together with an experimental scaled-down prototype of 160 kVA.Index Terms-High-voltage ac (HVAC), HVDC, oil and gas (O&G), subsea transmission and distribution (T&D), variablespeed drive systems.

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Section: A Conventional Hvacmentioning

confidence: 99%

A Modular Stacked DC Transmission and Distribution System for Long Distance Subsea Applications

Song-Manguelle

Todorovic²,

Gupta³

et al. 2014

IEEE Trans. on Ind. Applicat.

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Power Distribution in Subsea Developments: A System Engineering Perspective

Moreno-Trejo¹,

Markeset

2014

All Days

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Subsea developments represent several technical challenges for O&G companies. The tie-back solution has been used in the industry to exploit remote fields or connect systems directly to onshore facilities or nearby existing production facilities. As it can use existing resources/facilities, this solution may save capital and operational expenses (CAPEX and OPEX). Moreover, marginal fields may become commercially viable if they are connected to an existent platform.However, as fields are located farther away, limitations related to flow assurance, power and system distribution make it more difficult to assign resources to these projects. Systems such as power and control equipment may be located on platforms or subsea, and the choice of solutions is based on cost-saving potential, reliability and environmental care considerations. Power and control systems also have to be capable of working for long periods and functioning without interruptions. Distribution systems' study factors also concern distance from the power source to the seabed. For longer distances, the system should be designed to repeat signals from one subsea station to another.To explain some of the challenges and limitations for working subsea, a general description of power systems is provided. The study also discusses the role of system engineering in subsea projects and how it contributes to overcoming technical limitations and improving system performance. Good communication between all the groups is important and may reduce project errors and the need for rework.The study discusses some considerations that should be taken into account during the concept selection to prepare the system for current and future requirements. The type of umbilical for the power and control groups is also discussed. These are used to transmit communication and power to the system. Applications:The paper presents the role of system engineering in subsea projects. It identifies some parameters in the system and explains the technical limitations caused by loads and power requirements in subsea projects. Results, Observations, and Conclusions:System engineering should establish strong communication between the groups working internally in the project. They provide an overall view of the system that is critical to the optimization of resources. Decisions on where to place distribution systems depend on the location of the subsea installation as the voltage drop and power loss is proportional to the distance at which the power source is located.

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A Road Map for Renewable Energy Integration with Subsea Processing Systems

Pimentel¹,

Slater²,

Grant³

et al. 2021

Day 1 Tue, September 07, 2021

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This paper proposes a road map for the integration of renewable energy supply to power subsea processing systems. To replace the traditional power supply, like fossil fuel-based generators or grid power, a wind turbine generator (WTG) operating on a islanded mode has been introduced and discussed. A review of the state of the art of WTGs is performed, primarily focused on power and controls aspects, with identification of the main technological gaps left to achieve wind-powered subsea processing. To fully assess the renewable energy integration and current gaps, a study case is proposed which addresses a subsea compression train powered by offshore wind. A thorough analysis is conducted, with meteorological conditions based on the NCS (Norwegian Continental Shelf), where gas line packing is proposed as an innovative means of energy storage. Finally, an economic analysis as well as a CO2 emission estimate is presented to demonstrate the benefits of the proposed road map. Some further discussions and conclusions are presented as well as some propositions for future works.

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Subsea Power Systems - a Key Enabler for Subsea Processing

Cited by 5 publications

References 0 publications

A Modular Stacked DC Transmission and Distribution System for Long Distance Subsea Applications

A Modular Stacked DC Transmission and Distribution System for Long Distance Subsea Applications

Power Distribution in Subsea Developments: A System Engineering Perspective

A Road Map for Renewable Energy Integration with Subsea Processing Systems

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