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相关概念视频

Distribution Reliability and Automation01:25

Distribution Reliability and Automation

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Distribution reliability in electrical power systems is critical for ensuring an uninterrupted power supply to consumers at minimal cost. According to IEEE Standard Terms, reliability is the probability that a device will function without failure over a specified time period or amount of usage. For electric power distribution, this translates to maintaining continuous power supply and addressing customer concerns over power outages. Several indices, as defined by IEEE Standard 1366-2012, are...
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Average Power01:13

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In practical electrical applications, the concept of time-varying instantaneous power is not frequently utilized. Instead, focus shifts to the more practical quantity known as average power. Average power is determined by integrating the instantaneous power over a specified time period and subsequently dividing it by that duration.
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In an electrical system with a resistor, voltage and current signals facilitate the measurement of power and energy across the resistor. For a continuous-time signal, the total energy over a time interval is defined as the integral of the square of the signal's magnitude over that interval. Mathematically, this is expressed as:
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The power transmission to a factory involves the transfer of apparent power, a combination of active and reactive power. The power factor measures how effectively electrical power is converted into useful work output. The ratio of the real power (KW) that does the work to the apparent power (KVA) supplied to the circuit.
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The principle of power preservation is applicable to both ac and dc circuits. This principle, when applied to AC power, asserts that the complex, real, and reactive powers produced by the source are equal to the total complex, real, and reactive powers absorbed by the loads. When two load impedances are connected in parallel to an ac source V, the complex power provided by the source can be calculated using the relation
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The fast decoupled power flow method addresses contingencies in power system operations, such as generator outages or transmission line failures. This method provides quick power flow solutions, essential for real-time system adjustments. Fast decoupled power flow algorithms simplify the Jacobian matrix by neglecting certain elements, leading to two sets of decoupled equations:
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Experimental Investigation of the Hierarchical Control in DC Microgrids Using a Real-time Simulator
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探索直流电源质量测量和特征技术.

Yara Daaboul1,2,3, Daniela Istrate1, Yann Le Bihan2

  • 1Laboratoire National de Métrologie et D'essais (LNE), 78190 Trappes, France.

Sensors (Basel, Switzerland)
|October 16, 2025
PubMed
概括

精确测量低压直流电网 (LVDC) 的扭曲,对于可靠的可再生能源整合至关重要. 本研究介绍了两个可追溯的测量系统,设计用于实验室和现场使用,确保评估直流电网动态的低不确定性.

关键词:
电流扭曲 电流扭曲 电流扭曲电流的波纹是 DC 波纹.在LVDC电网中使用LVDC电网.准确度 准确度 准确度 准确度测量链中的测量链.

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科学领域:

  • 电气工程 电气工程
  • 电力系统 电力系统
  • 计量学 计量学是一门学科.

背景情况:

  • 现代能源基础设施越来越多地集成可再生能源和直流 (DC) 技术.
  • 低压直流电网 (LVDC) 提供效率优势,但需要了解直流扭曲才能可靠运行.
  • 传统的交流测量技术不足以评估直流扭曲.

研究的目的:

  • 开发和展示两个可追溯的测量链,用于准确量化LVDC电网中的直流扭曲.
  • 为了提供稳定状态直流元件的低不确定性测量,扭曲幅度和频率.
  • 为了能够可靠地评估未来LVDC电网的动态行为.

主要方法:

  • 开发两个互补的可追溯测量链,用于直流扭曲分析.
  • 一个链是针对受控实验室环境而优化的,另一个链是针对灵活的现场应用而优化的.
  • 硬件的特征与详细的不确定性预算和测量方法的评估.

主要成果:

  • 两种测量链都在高达1000V的电压和高达30A的电流中实现了低不确定性 (0.01%至<1%).
  • 可以准确测量高达150-500 kHz的扭曲的频率组成部分.
  • 提出的方法克服了传统的交流技术对直流扭曲评估的局限性.

结论:

  • 开发的测量系统为LVDC电网中的直流扭曲提供了准确可靠的数据.
  • 这些工具对于理解和确保未来直流动力能源基础设施的稳定性至关重要.
  • 这些发现支持可再生能源和直流技术的有效整合.