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相关概念视频

Energy Line and Hydraulic Gradient Line01:27

Energy Line and Hydraulic Gradient Line

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Based on Bernoulli's equation, the energy line (EL) and hydraulic grade line (HGL) provide graphical representations of energy distribution in a fluid flow system. For steady, incompressible, inviscid flows, Bernoulli's equation is expressed as:
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Transmission Line Design Considerations01:23

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Aluminum has become the material of choice for overhead transmission lines, surpassing copper due to its abundance and cost-effectiveness. The most prevalent type is the aluminum conductor, steel-reinforced (ACSR), which combines aluminum strands around a steel core. Other variants include all-aluminum conductors (AAC), all-aluminum alloy conductors (AAAC), aluminum conductor alloy-reinforced (ACAR), and aluminum-clad steel conductors. Advanced designs, such as aluminum conductors with steel...
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Transformers in Distribution System01:27

Transformers in Distribution System

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Transformers in distribution systems can be broadly categorized into distribution substation transformers and other distribution transformers. They are crucial for stepping down high transmission voltages to levels suitable for distribution and end-user applications.
Distribution substation transformers come in various ratings and typically use mineral oil for insulation and cooling. To prevent moisture and air from entering the oil, some transformers use an inert gas like nitrogen to fill the...
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Maximum Power Flow and Line Loadability01:23

Maximum Power Flow and Line Loadability

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The maximum power flow for lossy transmission lines is derived using ABCD parameters in phasor form. These parameters create a matrix relationship between the sending-end and receiving-end voltages and currents, allowing the determination of the receiving-end current. This relationship facilitates calculating the complex power delivered to the receiving end, from which real and reactive power components are derived.
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Multipipe systems consist of complex configurations of interconnected pipes designed to transport fluids efficiently across intricate networks. They are essential in engineering applications requiring precise control over flow distribution, pressure, and head loss. They are categorized into series, parallel, loop, and network configurations, each distinguished by unique flow characteristics and applications.
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Reducing Line Loss

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In a three-phase circuit, line loss is an indicator of energy dissipated as heat due to the resistance of transmission lines. To address this, incorporating transformers into the system—a step-up transformer at the source and a step-down transformer at the load—is a strategic solution. Two three-phase transformers are introduced to improve this.
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在大型天然气网络中优化价值链,考虑高度和传输方向.

Xifeng Ning1, Jinfeng Qiu2, Dejun Yu3

  • 1Information Engineering, PetroChina Planning & Engineering Institute, No. 3 Zhixin West Road Haidian District, Beijing, China.

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这项研究优化了中国最大的管道网络中的天然气输送. 一个新的顺序线性编程算法有效地解决复杂的操作问题,确保可靠的能源供应.

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燃气网络中的天然气.顺序的线性编程 顺序的线性编程价值链优化的价值链优化

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科学领域:

  • 工程 工程师 工程师 工程师
  • 运营研究 运营研究
  • 能源系统 能源系统

背景情况:

  • 中国最大的天然气公司管理着广泛的管道网络.
  • 季节性需求波动使天然气输送和网络运营复杂化.
  • 精确的气体流量建模,包括高度,对于高效运营至关重要.

研究的目的:

  • 开发一个高效的算法,以优化大规模网络中的天然气输送.
  • 解决天然气管道运营中非线性,非凸混合整数问题的复杂性.
  • 改善每月天然气输送决策的运营基础.

主要方法:

  • 一个修改后的包含海拔的韦斯方程被用于模拟气体流.
  • 一个连续的线性编程算法被开发和应用.
  • 该算法在现实世界的大规模中国天然气网络上进行了测试.

主要成果:

  • 拟议的算法在解决大规模优化问题方面表现出了效率.
  • 为复杂的天然气输送业务提供高质量的解决方案.
  • 该方法为广泛的管道网络的运营规划提供了一种可行的方法.

结论:

  • 顺序线性编程为优化天然气输送提供了有效的解决方案.
  • 修改后的韦斯方程准确地捕捉了物理气体流动的动态,包括高度.
  • 开发的算法提高了主要能源公司的运营效率和可靠性.