volt-ampere reactive

简明释义

乏

英英释义

例句

1.The power factor correction system is designed to reduce the amount of volt-ampere reactive 无功伏安 in the electrical circuit.

该功率因数校正系统旨在减少电路中的无功伏安。

2.Understanding volt-ampere reactive 无功伏安 is crucial for engineers when designing power systems.

理解无功伏安对工程师在设计电力系统时至关重要。

3.A capacitor bank can help improve the volt-ampere reactive 无功伏安 levels in an industrial facility.

电容器组可以帮助改善工业设施中的无功伏安水平。

4.The utility company charges extra fees if your volt-ampere reactive 无功伏安 usage exceeds a certain limit.

如果您的无功伏安使用超过某一限制，公用事业公司会收取额外费用。

5.The formula for calculating volt-ampere reactive 无功伏安 involves the sine of the phase angle.

计算无功伏安的公式涉及相位角的正弦值。

作文

In the world of electrical engineering, understanding various units of measurement is crucial for effective design and analysis. One such unit that often comes up in discussions of alternating current (AC) circuits is volt-ampere reactive. This term is essential for grasping the concept of reactive power, which plays a significant role in the performance and efficiency of electrical systems. To fully appreciate what volt-ampere reactive means, we need to delve into the fundamentals of AC circuits and the nature of electrical power.Reactive power is different from active power, which is the actual power consumed by electrical devices to perform work. While active power is measured in watts (W), reactive power is measured in volt-ampere reactive (VAR). The distinction between these two types of power is vital because it influences how electrical systems are designed and operated. In an AC circuit, not all the power drawn from the source is used to do useful work; some of it oscillates back and forth between the source and the load, creating a phenomenon known as reactive power.The presence of reactive power is primarily due to inductive and capacitive components in the circuit. Inductive elements, like motors and transformers, store energy in magnetic fields, while capacitive elements, such as capacitors, store energy in electric fields. When these components are in play, they cause a phase difference between voltage and current, leading to the need for volt-ampere reactive to quantify this effect.To illustrate the importance of volt-ampere reactive, consider a simple example involving an AC circuit with an inductor. When an alternating current flows through the inductor, it creates a magnetic field that stores energy. However, this stored energy does not contribute to the actual work done by the circuit; instead, it cycles back and forth between the source and the inductor. The power associated with this energy exchange is classified as reactive power and is expressed in volt-ampere reactive.Managing reactive power is essential for maintaining the stability and efficiency of electrical systems. Utilities often monitor and control reactive power to ensure that the voltage levels remain within acceptable limits. If too much reactive power is present in the system, it can lead to voltage instability, reduced efficiency, and even equipment damage. Conversely, insufficient reactive power can result in voltage drops and poor performance of electrical devices.In industrial settings, engineers often use power factor correction techniques to manage reactive power effectively. The power factor is the ratio of active power to apparent power and indicates how efficiently electrical power is being converted into useful work output. By improving the power factor, engineers can reduce the amount of volt-ampere reactive in the system, leading to enhanced efficiency and lower energy costs.In conclusion, the term volt-ampere reactive is a fundamental concept in electrical engineering that represents reactive power in AC circuits. Understanding this term is crucial for engineers and technicians who design, analyze, and maintain electrical systems. As technology continues to evolve, the management of reactive power will remain an essential aspect of ensuring the reliability and efficiency of electrical networks. Therefore, a solid grasp of volt-ampere reactive and its implications is indispensable for anyone involved in the field of electrical engineering.

在电气工程领域，理解各种测量单位对于有效的设计和分析至关重要。其中一个在交流电（AC）电路讨论中经常出现的单位是无功伏安。这个术语对于理解无功功率的概念至关重要，无功功率在电气系统的性能和效率中扮演着重要角色。要全面理解无功伏安的含义，我们需要深入了解交流电路的基础知识以及电力的性质。无功功率与有功功率不同，有功功率是电气设备实际消耗的用于做功的功率。虽然有功功率以瓦特（W）为单位进行测量，但无功功率以无功伏安（VAR）为单位进行测量。这两种功率之间的区别至关重要，因为它影响电气系统的设计和操作。在交流电路中，从源头抽取的所有功率并不都是用于做有用的工作；其中一部分功率在源头和负载之间来回摆动，形成了无功功率这一现象。无功功率的存在主要是由于电路中的感性和容性元件。感性元件，如电动机和变压器，会在磁场中储存能量，而容性元件，如电容器，则会在电场中储存能量。当这些元件发挥作用时，它们会导致电压和电流之间的相位差，从而需要用无功伏安来量化这种效应。为了说明无功伏安的重要性，考虑一个涉及电感器的简单例子。当交流电流流过电感器时，它会产生一个储存能量的磁场。然而，这种储存的能量并不贡献于电路所做的实际工作；相反，它在源头和电感器之间来回循环。与这种能量交换相关的功率被归类为无功功率，并以无功伏安表示。管理无功功率对于维持电气系统的稳定性和效率至关重要。公用事业公司通常监测和控制无功功率，以确保电压水平保持在可接受的范围内。如果系统中存在过多的无功功率，可能导致电压不稳定、效率降低甚至设备损坏。相反，若无功功率不足，可能导致电压下降和电气设备性能不佳。在工业环境中，工程师通常使用功率因数校正技术来有效管理无功功率。功率因数是有功功率与视在功率的比率，表明电力被转换为有用工作输出的效率。通过改善功率因数，工程师可以减少系统中的无功伏安的数量，从而提高效率并降低能源成本。总之，术语无功伏安是电气工程中的一个基本概念，代表了交流电路中的无功功率。理解这个术语对于设计、分析和维护电气系统的工程师和技术人员至关重要。随着技术的不断发展，无功功率的管理将继续是确保电气网络可靠性和效率的一个重要方面。因此，对于任何从事电气工程领域的人来说，扎实掌握无功伏安及其影响是不可或缺的。