基于PLC的海面电站监控系统研究及仿真

电站作为海面工作中电能的管控,为海面作业提供保障,所以作用至关重要。对电站的监控现在也有比较成熟的技术,包括各种控制软件的应用。本系统结合实际情况及最新发展,提出基于PLC的海面电站监控系统,芯片选用的是西门子可编程控制器S7.300作为核心处理器,该型号PLC工作效率高,控制精度比较高,性能稳定,对于信号处理及硬件控制都有很好的优势,可以有效保证海面电站监控系统的稳定性。海面电站监控系统所承担的角色非常重要,所以要尽可能降低系统的漏洞,对其进行仿真,可以有效地减少研发成本及开发周期,并且可以提高操作员的技能,本文结合Matlab及VC编程软件,对该监控系统进行仿真研究。     

基于DSP的船舶电站监控系统设计

电站为船舶提供动力来源,在船舶航行中有非常重要的地位。对电站的监控现在也有比较成熟的技术,包括各种控制软件的应用。本系统结合实际情况及最新发展,提出基于DSP的船舶电站监控系统,芯片选用的是TI公司的TMS320F2812 DSP作为核心处理器,该型号DSP工作效率高,控制精度比较高,性能稳定,对于信号处理及硬件的控制都有很好的优势,可以使得监控系统稳定高效的工作。本系统配以MCGS组态软件作为监控软件,可以实时的从电脑终端对船舶中的各个设备及电站的工作状态进行可视化监控,以便做出及时决策。系统可以手动及自动的控制发电机开启、停止、加减速,并且系统可以在出现故障的时候进行报警提示。     

舰船动力系统的综合体系评价研究

以舰船动力系统综合体系评价为研究对象。通过对评价过程的分析和评价体系指标的选择,考虑到对评价指标的数据处理和量化分析,采用了层次分析法(AHP)评价模型实现对舰船评价指标的优化计算,并通过对该模型的实例分析获取综合评价结果。结果表明,该方法能够客观评估出舰船动力系统的状态水平,具有一定的应用和参考价值。     

基于混沌分析法的舰船电力系统稳定性研究

对舰船电力系统进行分析建模,并根据电力系统模型状态的非线性混沌特征,结合模型幅值扰动参数,分析出混沌现象产生的原因和影响因素。在此基础上,有针对性地利用自适应反演算法在模型中引入适当的控制器,有效地避免电力系统运行中因干扰进入混沌震荡状态,保证了舰船电力系统的正常运行和舰船的安全稳定。研究结果表明,即使舰船电力系统出现混沌现象时,也可以根据其特征状态进行有效的稳定性控制,保持舰船的综合性能。     

大型油船进出钦州港拖船功率探讨

为了确定大型油轮进出港口所需拖轮功率,通过对目前最常用的两种确定功率的方法进行对比分析,得出各自的优点和不足,结合钦州港实际情况,运用这两种方法确定在不同条件下,大型油轮进出钦州港所需拖轮功率。     

车辆动力性能评价仿真系统设计

运用LabVIEW图形化编程软件,通过结构化设计及模块化编程,设计出车辆动力性能评价仿真系统.该仿真系统考虑了多种参数对车辆动力性能的影响,并且能够处理Excel扭矩数据表格和生成Word报表文档,使用方便,仿真结果准确性较高.利用此仿真结果可进一步优化车辆的结构参数,从而提高车辆的动力性能.     

The Evaluation of the 2nd Ocean Plan in Korea: Focused on the Implementing Power of the Plan

There seem to be two types of ocean planning system in the world. First, the federal or united government suggests a basic framework of the plan which is followed by states, countries or areas as shown in the European Union, the United States, Canada, Australia, and so on. Second, a powerful central government prepares a basic ocean plan that guides the following sector plans of the relevant ministries. These cases are shown in Japan, Korea, and China. In Korea, the 2nd Ocean and Fishery Development Plan (OK21, 2011–2020) was made as a comprehensive ocean plan reflecting recent natural and social changes including global warming. The OK21 is declarative in its nature, and so evaluated by its sector plans, which have some specific implementing means such as budgets and manpower, organization, and so on, by the relevant laws. The 2nd OK21 is supported by 21 legally binding sector plans, 14 more than in the 1st plan, thus guaranteeing more effective implementation than in the 1st plan. In addition, most of sector plans are planned to be carried out through the well-coordinated system among the related ministries, thus showing a high degree of implementing efficiency of the plan. Every marine area in the plan, including marine environment, is being supported by more sector plans than before, indicating the equitable development of marine areas in the future. In sum, the 2nd OK21 is expected to show more implementing power due to the well-organized sector plans than in the 1st plan.     

Experimental and finite element analysis of fatigue strength for 300 mm2 copper power conductor

The fatigue strength of a 300 mm² stranded copper conductor was investigated experimentally and by finite element (FE) analysis. An analytical model was also developed and validated. Wires taken from the outer layer of the conductor were fatigue tested in tension–tension loading and compared with similar data for wires taken from a 95 mm² conductor. The wire cross section was deformed due to the compacting process that was applied during fabrication. When corrected for stress concentrations due to the deformation the data for the two sets of wire fell within the same scatter-band. Full scale testing was carried out in a specially designed rig with constant tensile load and reversed displacement controlled bending with a fixed curvature variation. The loading is a simulation of the loading of a power cable hanging from a floating vessel through a bellmouth. Conductors were tested in two states; dry and lubricated. A finite element model was established for the copper conductor. The model was formulated by a combination of elastic beam and beam-contact elements that included the effects of friction. The effect of local bending due to contact forces was included in the model. Two contact conditions were investigated; the point (trellis) contact between adjacent layers of wire and the inline contact within each layer and between the first layer (centre wire) and the second layer. The FE model was validated by a calibration test of a full scale conductor, and by sensitivity studies varying the size and the number of elements of the model. Fatigue analysis of the conductor was carried out, based on the S–N curve for individual wires. Taking into account the effects of friction and local bending, agreement was obtained between predicted and experimental fatigue strength of the conductor, for the FE model as well as the analytical model.     

关于海上钻井平台并网发电技术的探讨

本论文对海上钻井平台的发电系统做了一些探讨。提出了并网发电的设想,并对其硬件部分和具体的接入方式做些说明,弥补了现有的风力发电系统的不足。     

开拓岸电技术引领绿色水运——连云港岸电技术介绍

为了进一步节能减排，建设绿色港口，连云港在吸取国内外岸电技术成功技术的基础上，开拓了自己的岸电技术。介绍了连云港港岸电技术的由来，其在绿色水运中的意义，技术方案及其优点。阐述了实施该方案需要解决的问题。对中国在岸电方面引领世界的前景进行了展望。