A new optimal approach for improvement of active power filter using FPSO for enhancing power quality

In the recent years, development of industry cause to increase nonlinear and time variant loads in power systems. These loads bring about power quality phenomena such as voltage and current harmonics, current unbalance and flicker in power systems. In this paper, an optimal method for active power filter is proposed to improve power quality. The control system of APF is based on combination of the synchronous detection method, instantaneous power theory, and output of DC capacitor voltage regulator. To stabilize the DC voltage and improvement of reference currents, PID controller is suggested. Regarding to intense changes of load in power system due to nonlinear load, PID controller with fixed parameters could not adequate for the APF control. Therefore, Fuzzy Particle Swarm Optimization method is proposed for optimizing of PID controller. This method is found on PSO and Fuzzy algorithm. To evaluate the proposed method, the APF is modeled in the worst conditions with a power system loaded with two electric arc furnace. In addition, in order to make good use of frequency changes in the power system, the power frequency estimation is put to use.     

浅水非共线海况下FPSO运动与上浪分析

通过时域数值计算和模型试验分析FPSO在浅水非共线风浪流海况作用下的运动性能与舷侧甲板上浪情况。结果表明,艏摇角对于FPSO的摇荡影响显著,斜向迎浪,船舯附近比船艏和船艉处更容易发生甲板上浪;相同水深时,有义波较高海况下FPSO的横摇和纵摇运动响应反而较低,但上浪现象较严重;相同海况下,水深较浅时运动较小,符合浅水效应规律,但此时舷侧甲板上浪更为严重。     

Coupling analysis of finite element and finite volume method for the design and construction of FPSO crane

The aim of this study is to establish a procedure for systematic design and performance evaluation of an offshore platform (FPSO; Floating, Production, Storage and Offloading) crane using a computational approach. Coupling analyses of the finite element and finite volume methods, which are applicable for ensuring robust design under the consideration of nonlinear environmental effects, were carried out. In order to investigate the effects of dynamic loading, the boundary conditions of an offshore platform crane having a lifting capacity of 100 tons were studied. In the finite volume method, a series of analyses were carried out using the computational fluid dynamics code, FLUENT. The crane's weight, maximum lifting load, calculated wind pressure and boundary conditions such as the inclination of the deck due to the extreme roll motion of FPSO were also considered in the finite element analyses using the commercial code, MSC/NASTRAN. Deformation, stress distribution, as well as fatigue life estimation were conducted under the unified computational environment. An advanced procedure for evaluating design concept validation was proposed for the application of FPSO design and construction.     

南海浮式生产储油轮90m水深混合气潜水作业实践

从南海海上环境和现有装备资源的实际情况出发,利用拖轮拖带海上浮式生产储油轮至适宜混合气潜水的位置,使用本地混合气潜水人员及装备,在不动用2代动力定位船的情况下,实现了90 m水深混合气深潜水作业,取得了显著的经济效益,为节约海上油田开发操作费用开辟了一条新的途径.     

基于MOSES的FPSO限位作业中拖船布置方案适用性分析

为了将浮式生产储卸油装置（Floating Production Storage and Offloading,FPSO）限定在特定区域,给出一套FPSO限位作业拖船布置方案,并对该方案进行数值仿真计算,基于MOSES软件将FPSO、软钢臂、系泊腿和限位拖缆构成限位分析多刚体耦合计算模型,根据不同的装载和环境工况,通过频域分析计算响应幅值算子（Response Amplitude Operator,RAO）,在时域下模拟FPSO的运动响应,应用统计方法对运动响应和拖缆的受力进行统计并计算最大值,计算结果为限位作业的安全可行提供参考依据。     

浮式生产储油装置建造中的几个关键界面

以秦皇岛 32 - 6FPSO建造为例 ,从项目管理的角度着重对如何做好船体结构的 4个关键界面 ,即单点系泊支架与船体的连接结构、上部工艺模块与船体的连接结构、动力模块与船体的连接结构、甲板吊机与船体的连接结构界面的协调工作进行论述 ,旨在总结秦皇岛 32 - 6项目的成功经验 ,为今后FPSO建造项目提供借鉴。     

用短峰波理论预报南海浮式生产储油装置运动响应

用短峰波理论并采用谱分析法,对在南海100年重现期极端环境条件下转塔式单点系泊的浮式生产储油装置(FPSO)的耐波性进行了分析。与长峰波理论计算结果相比,短峰波理论计算结果具有以下特点:①FPSO横摇运动幅值和纵摇运动幅值对波向角的变化不太敏感,其最大值与最小值之间的差值较小;②在迎浪状态下FPSO的横摇运动幅值不为0,而且会产生较大的横摇运动响应;③在横浪状态下FPSO也会产生较大的纵摇运动响应。短峰波理论的运动响应计算结果打破了PFSO在迎浪时模摇运动为0,在横浪时纵摇运动为0的传统观念。南海FPSO设计运动参数选择以短峰波压载状态下的计算结果为依据。     

FPSO能源系统优化研究

随着深海及边际油田的不断开发,FPSO（浮式生产储卸油装置）广泛应用于海上油气田开发。FPSO作为兼具产能和耗能的油气生产装置,在满足其用能需求的前提下,采取一个经济的能源分配方案,不仅有利于降低建设成本,同时有助于提高整个系统的能源利用率,促进节能。以能源系统年总成本费用最低为目标函数,在考虑能源平衡约束和技术约束的条件下,建立并求解一个FPSO分布式能源系统的混合整数线性规划（MILP）模型,以此确定年总成本最少的情况下的设备选择和容量以及相应的运行方案,从而达到节能降耗的目的。以渤海某FPSO为实例,对模型进行了计算验证。结果表明,与传统的运行方案相比,分布式能源系统可降低经济费用14.6%。此外,研究了能源价格对系统经济性的影响,发现天然气价格的上涨对DES（分布式能源系统）设计和运行影响较大。     

"海洋石油115"号FPSO船体设计

从工程设计角度,简要介绍了西江23-1油田"海洋石油115"号FPSO的船体设计,对设计中的几个关键问题及其解决作了阐述,为今后FPSO的设计提供借鉴.     

FPSO水处理方案优化研究

海上某油田生产污水处理量达到9万方/天,水处理设备占用大量平台空间。将所有的水处理设备由上部组块优化到FPSO舱室中,可充分利用舱室,节约上部组块的空间。