Design And Simulation On The Electrical Close Ring System Of The DP-3 Semi-drilling Platform

With the depletion of land-based oil and gas resources,oil and gas exploration has become a global consensus,and ocean engineering equipment and deep-water exploration equipment technologies have developed rapidly.Among these,the semi-submersible drilling platform capable of working in deep water has become the preferred equipment.The research scope of this paper belongs to the research of dynamic positioning power station system of semi-submersible drilling platform.The principle of the dynamic positioning system is to use a large motor to drive the propeller to achieve the positioning control of the platform,and the power of the large-scale motor needs to be provided by a large-capacity power station.The generators used in the drilling platform power stations generally use fuel to generate electricity,and fuel consumption is very large.Based on the current configuration of the mainstream semi-submersible drilling platform,this article mainly studies how to reduce the fuel consumption of the platform by transforming the power supply scheme of the power station.Because most of the domestic and foreign semi-submersible drilling platforms adopt the DP-3 level dynamic positioning system,the main research content in this paper is how to retrofit the DP-3 power positioning class semi-submersible power station.To achieve the effect of energy saving.The specific object studied in this paper is the offshore oil 982 semi-submersible drilling platform(HYSY982 platform)project built by Dalian Shipbuilding Industry Group.The HYSY982 platform is a typical DP-3 level dynamic positioning platform.The original power station scheme on the platform is running discretely.The main research topic of this paper is how to design the ring network power station on the HYSY982 platform,and use the ring network design to achieve the goal of saving fuel.This article discusses how to design and transform a ring network with DP-3 level dynamic positioning platform from three aspects.The first aspect is the design: The research method adopted in this paper is to compare the discrete operation of the power station and the operation of the ring network to design a ring network power schematic.Through the research on the difficulties of the power theory of the ring network,a specific topology diagram is designed.At the same time according to the topology diagram to complete the system's transformation configuration;the second aspect is the simulation: In order to verify the correctness and feasibility of the design,this paper studies the use of transient characteristics simulation method to verify,through the analysis of the transient characteristics of the ring network operation This article discusses how to simulate conditions and get the expected results.The third aspect is the experimental aspect: In order to improve the ring network function of the system,in the case that the defects can not be solved through the simulation method,this article studies how to perfect the system design through experiments,and also discusses how to pass the experiment.Verify the ultimate function of the ring network transformation.The research results in this paper prove that the retrofitting of the power plant ring network of the DP-3 semi-submersible platform is feasible,and the researched design and simulation methods have strong guiding significance for the reconstruction of the same type of platform.