相关实验视频
Updated: May 23, 2025

08:23
Finite Element Modelling of a Cellular Electric Microenvironment
Published on: May 18, 2021
3.3K
对于交流和直流电力系统的时空pq理论
Fang Z Peng1, Hao Huang2, Leon M Tolbert3
1University of Pittsburgh, Pittsburgh, USA. fangzpeng@gmail.com.
Scientific reports
|March 10, 2025
概括
本研究引入了对主动和反应功率的统一时空理论,适用于交流 (AC) 和直流 (DC) 系统. 它解决了关于直流和混合动力系统中反应功率的基本问题.
科学领域:
- 电气工程 电气工程
- 电力系统分析 分析 分析
- 理论物理 理论物理
背景情况:
- 交替电流 (AC) 电源系统长期以来一直利用反应电源概念进行分析和优化.
- 现有的反应功率理论仅限于特定的交流情况,不适用于直流 (DC) 系统.
- 电力电子和可再生能源日益集成,需要在现代电网中采取统一的电力分析方法.
研究的目的:
- 解决DC和混合AC/DC电源系统中缺乏反应功率理论的问题.
- 将现有的交流反应功率理论统一到一个全面的框架中.
- 为复杂的电力系统的分析,设计和运行提供理论指导.
主要方法:
- 发展一个时空 (空间和时间) 活性和反应功率理论.
- 使用多维时空向量的点和交叉乘积的数学公式.
- 通过思想实验探索理论定义,物理含义和实际应用.
主要成果:
- 开发了一种关于主动和反应功率 (pq) 的新型时空理论,适用于交流和直流系统.
- 该理论提供了一种统一的定义和对反应功率组件及其在各种系统中的行为的理解.
- 数学框架为复杂电网中的电力流和组件相互作用提供了新的见解.
结论:
- 拟议的时空反应电力理论提供了一个整合和普遍适用的框架.
- 这个统一的理论对于理解和管理越来越复杂的交流,直流和混合系统中的电力至关重要.
- 开发的数学原理对未来的电力系统分析和设计有着根本性的影响.
更多相关视频
相关概念视频
Power in an AC Circuit
1.9K
In a DC circuit, the power consumed is simply the product of the DC voltage times the DC current, given in watts. However, the power consumed for AC circuits with reactive components is calculated differently. Since electrical power is the "rate" at which energy is used in a circuit, all electrical and electronic components and devices have a safe operating range for electrical power.
In a DC circuit, there is no sinusoidal waveform associated with the supply; the voltages and currents...
In a DC circuit, there is no sinusoidal waveform associated with the supply; the voltages and currents...
1.9K
Conservation of AC Power
320
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
320
Kirchoff's Laws using Phasors
379
Analyzing AC circuits in electrical systems is a fundamental aspect of electrical engineering. In these circuits, AC power is supplied from a distribution panel and wired to various household appliances in parallel. To perform a comprehensive analysis, electrical engineers use Kirchhoff's voltage and current laws, which are equally applicable in AC circuits as in DC circuits.
Kirchhoff's voltage law (KVL) states that the sum of phasor voltages around a closed loop in an AC circuit...
Kirchhoff's voltage law (KVL) states that the sum of phasor voltages around a closed loop in an AC circuit...
379
Instantaneous Power
354
Instantaneous power is important in electrical circuits, mainly when dealing with sinusoidal input. Instantaneous power, denoted as p(t), results from the multiplication of the instantaneous voltage (v(t)) across an element and the instantaneous current (i(t)) flowing through it. This relationship adheres to the passive sign convention and represents a fundamental principle in electrical engineering.
354
The Power Flow Problem and Solution
148
Power flow problem analysis is fundamental for determining real and reactive power flows in network components, such as transmission lines, transformers, and loads. The power system's single-line diagram provides data on the bus, transmission line, and transformer. Each bus k in the system is characterized by four key variables: voltage magnitude Vk, phase angle δk, real power Pk, and reactive power Qk. Two of these four variables are inputs, while the...
148
Three-Phase Circuits
383
AC power distribution systems have three categories: single-phase, two-phase, and three-phase systems. The single-phase circuit, common in residential settings, typically employs a two-wire system connecting a single AC source to various loads. These circuits support standard household appliances operating at 120 volts (V) and 240 V, such as lamps, televisions, and microwaves. The first generators, Niagara Falls hydro plant installed in 1895, were two-phase and designed by Nikola Tesla. The...
383

