Chinese Journal of Ship Research, Volume. 18, Issue 6, 257(2023)

Design of DC grid system for green intelligent hybrid bulk carrier

Li SU
Author Affiliations
  • Wuhan Changjiang Ship Design Institute Co. Ltd., Wuhan 430062, China
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    Figures & Tables(10)
    [in Chinese]
    [in Chinese]
    [in Chinese]
    [in Chinese]
    • Table 1. Comparison of main features between AC and DC grid system

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      Table 1. Comparison of main features between AC and DC grid system

      类别交流组网直流组网
      设备集成度较低减少所采用的设备数量,设备集成度提高
      体积和重量体积较大、重量较重节省了变压器等设备,极大优化电气设备的体积和重量
      谐波控制较差谐波、谐振方面的技术和施工风险明显降低
      兼容性储能设备、变频负载接入需要其他外部设备投入DC/DC或DC/AC集成于直流组网变频控制配电系统中,简化设备配置,兼容性好
      系统效率较低减少交−直流转换次数,功率损耗较小、效率较高
      能效一般支持发电机变速运行,能效得到提升
      电站控制管理电压的频率、相位和幅值都相等发电机组才能并车与频率相位无关,调速性能、容量、频率、燃料差异大的不同类型发电机组可以并联稳定运行[21]
      外部接口较复杂降低了外部接口的复杂性,有利于电缆布线及冷却系统设计
    • Table 2. The principal dimensions of the bulk carrier

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      Table 2. The principal dimensions of the bulk carrier

      参数数值
      总长/m129.98
      水线长/m129.98
      垂线间长/m128.00
      型宽/m16.20
      型深/m7.20
      设计吃水/m5.20
      最大吃水/m6.20
      最大载重量/t9833.57
      设计航速/(km·h-1)19.00
    • Table 3. The configuration of main equipment of DC grid for hybrid system

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      Table 3. The configuration of main equipment of DC grid for hybrid system

      设备参数额定值设备台数备注
      主机功率/kW6482柴油燃料
      发电机组功率/kW2303LNG燃料、异步发电机
      轴带电机功率/kW3202可逆
      锂电池组容量/kWh1611磷酸铁锂
      艏侧推功率/kW185 1定距桨变频调速
      直流配电板电压/V75018屏
      交流配电板电压/V400/23013屏
    • Table 4. The equipment's efficiency of DC grid for hybrid system

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      Table 4. The equipment's efficiency of DC grid for hybrid system

      参数数值
      主机效率ηME0.40
      气体发动机效率ηGS0.37
      机组发电机效率ηG0.953
      轴带电机效率ηSM0.958
      直流电网效率ηDC0.98
      交流电网效率ηAC0.98
      齿轮箱主速比效率ηGB10.97
      齿轮箱辅速比效率ηGB20.91
      轴带电机变频器效率ηVDF0.95
      双向DC变换器效率ηDC-DC0.97
      整流器效率ηREC0.97
      隔离变压器效率ηt0.98
      逆变器效率ηINV0.97
      可逆AC-DC变流器效率ηAC-DC0.97
      锂电池组效率ηB0.95
      轴系效率ηS0.98
      螺旋桨效率ηFPP0.63
    • Table 5. DC grid short circuit calculation results

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      Table 5. DC grid short circuit calculation results

      故障点短路电流/kA
      FA1支路馈线46.95
      FA2支路馈线48.12
      FA3支路馈线48.96
      FA4支路馈线55.09
      FA5支路馈线55.07
      FA6支路馈线51.71
      FB1支路馈线44.59
      FB2支路馈线45.24
      FB3支路馈线50.57
      FB4支路馈线48.61
      FB5支路馈线49.61
      FDSU母排短路23.73
    • Table 6. Parameters of DC grid quick acting fuses

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      Table 6. Parameters of DC grid quick acting fuses

      编号型号额定电流/A分断容量/kA弧前能量/A2s备注
      FA1170M5497700100160 0001#日用逆变
      FA2170M5497700100160 0001#推进逆变
      FA3170M5497700100160 000艏侧推逆变
      FA4170M54382501006 5001#制动单元
      FA5170M5497700100160 0001#整流器
      FA6170M5497700100160 0002#整流器
      FB1170M5497700100160 0002#日用逆变
      FB2170M5497700100160 0002#推进逆变
      FB3170M54382501006 5002#制动单元
      FB4170M5497700100160 0003#整流器
      FB5170M5497700100160 000储能系统
      FDSU170M5498800100245 000母联处
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    Li SU. Design of DC grid system for green intelligent hybrid bulk carrier[J]. Chinese Journal of Ship Research, 2023, 18(6): 257

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    Paper Information

    Category: Marine Machinery, Electrical Equipment and Automation

    Received: Aug. 18, 2022

    Accepted: --

    Published Online: Mar. 21, 2025

    The Author Email:

    DOI:10.19693/j.issn.1673-3185.03047

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