power factor

简明释义

功率因子

英英释义

例句

1.Many companies invest in capacitor banks to enhance their power factor 功率因数 and avoid penalties from the utility company.

许多公司投资于电容器组，以提高它们的功率因数 power factor，以避免来自公用事业公司的罚款。

2.Improving the power factor 功率因数 can significantly reduce the electricity bill for industrial users.

提高功率因数 power factor 可以显著降低工业用户的电费。

3.A power factor 功率因数 below 0.8 may result in additional charges from the power company.

如果功率因数 power factor 低于0.8，可能会导致电力公司收取额外费用。

4.The electrician explained that the power factor 功率因数 of the motor was too low, which could lead to higher energy costs.

电工解释说，电动机的功率因数 power factor 太低，这可能导致更高的能源成本。

5.The engineer conducted a study to determine the power factor 功率因数 of the entire electrical system.

工程师进行了研究，以确定整个电气系统的功率因数 power factor。

作文

Understanding the concept of power factor is essential in the field of electrical engineering and energy management. The power factor is defined as the ratio of real power, which does the useful work, to apparent power, which is the product of the current and voltage in an AC system. In simpler terms, it is a measure of how effectively electrical power is being converted into useful work output. A high power factor indicates efficient utilization of electrical power, while a low power factor suggests poor efficiency and wasted energy.To grasp the importance of power factor, we must first understand its components. Real power (measured in watts) is the actual power consumed by the electrical devices to perform work. Apparent power (measured in volt-amperes) is the total power flowing in the circuit, including both the real power and the reactive power, which does not perform any useful work but is necessary for maintaining the electric and magnetic fields in inductive loads such as motors and transformers.The formula for calculating power factor is given by:Power Factor = Real Power (Watts) / Apparent Power (Volt-Amperes)A power factor of 1 (or 100%) means that all the power supplied by the source is being used effectively for work. Most industrial and commercial systems aim for a power factor as close to 1 as possible to minimize energy costs and improve system reliability.In practical applications, a power factor less than 1 can lead to increased energy costs. Utility companies often charge higher rates for customers with a low power factor because it requires them to generate more apparent power to meet the same real power demand. This leads to higher losses in the distribution system and necessitates larger transformers and conductors, which can increase infrastructure costs.Improving power factor can be achieved through various methods, including the installation of capacitors or synchronous condensers that can offset the inductive effects of motors and other equipment. These devices help to reduce the amount of reactive power in the system, thereby improving the power factor. Regular monitoring and maintenance of electrical systems also play a crucial role in ensuring that the power factor remains at optimal levels.In conclusion, understanding and managing power factor is vital for anyone involved in electrical systems, whether in residential, commercial, or industrial settings. It not only affects energy efficiency and costs but also impacts the overall performance and reliability of electrical systems. By striving for a high power factor, we can ensure that our energy resources are utilized effectively, leading to a more sustainable and economically viable future.

理解功率因数的概念在电气工程和能源管理领域至关重要。功率因数定义为实际功率（做有用功的功率）与视在功率（在交流系统中电流和电压的乘积）之比。简单来说，它是电力转化为有用功输出的有效性度量。高功率因数表示电力的有效利用，而低功率因数则表明效率低下和能量浪费。要理解功率因数的重要性，我们必须首先了解其组成部分。实际功率（以瓦特为单位）是电气设备执行工作的实际消耗功率。视在功率（以伏安为单位）是电路中流动的总功率，包括实际功率和无功功率，无功功率不进行任何有用工作，但对于维持电感负载（如电动机和变压器）中的电场和磁场是必要的。计算功率因数的公式如下：功率因数 = 实际功率（瓦特）/ 视在功率（伏安）当功率因数为1（或100%）时，意味着所有由电源提供的功率都被有效地用于工作。大多数工业和商业系统都旨在将功率因数保持尽可能接近1，以最小化能源成本并提高系统可靠性。在实际应用中，功率因数小于1可能导致能源成本增加。公用事业公司通常会对低功率因数的客户收取更高的费用，因为这要求他们产生更多的视在功率来满足相同的实际功率需求。这导致配电系统中的损失增加，并需要更大的变压器和导体，从而可能增加基础设施成本。改善功率因数可以通过多种方法实现，包括安装电容器或同步调相机，这些设备可以抵消电动机和其他设备的感应效应。这些设备有助于减少系统中的无功功率，从而改善功率因数。定期监测和维护电气系统也在确保功率因数保持在最佳水平方面发挥着关键作用。总之，理解和管理功率因数对于任何参与电气系统的人来说都是至关重要的，无论是在住宅、商业还是工业环境中。它不仅影响能源效率和成本，还影响电气系统的整体性能和可靠性。通过努力实现高功率因数，我们可以确保有效利用能源资源，从而推动一个更加可持续和经济可行的未来。