Dynamic voltage restorer (DVR) is an effective solution for transient power quality problems.
动态电压恢复器(DVR)是解决暂态电能质量问题的一种有效途径。
In recent years, the growing demand for energy has made workers around the world attach great attention to power quality problems.
近年来，日益增长的电能需求量已经使得电能质量问题引起了世界各国工作者的高度重视。
There are new trends in the grid and load structure of modern power system, leading to various power quality problems which have aroused great attention of power departments and users.
现代电力系统的电网结构和负荷构成出现了新的变化趋势，随之带来的电能质量问题逐渐引起电力部门和用户的高度重视。
It is significant in design of traction power supply systems and evaluation of relative power quality problems to build a proper electric load model for the electric multiple units (EMU).
动车组电气负荷建模对牵引供电系统的设计以及电能质量相关问题的评估具有重要意义。
Nearly 90% of all power quality problems are voltage sags and momentary outages.
在所有的电力质量问题中，几乎90%为电压降落与瞬间停电。
Harmonic frequencies in the power grid are a frequent cause of power quality problems.
谐波频率在电网中是造成电能质量问题的常见原因。
In various power quality problems voltage sags are the worst dynamic power quality problems.
在各种电能质量问题中，电压跌落是危害最严重的动态电能质量问题。
The second part of the thesis classifies the problems of power quality. This part introduces all power quality problems.
文章第二部分对电能质量问题进行了分类，分别对各种电能质量问题进行了介绍。
It produces serial power quality problems such as reactive power excessive, negative exceeding, containing high harmonic.
由此产生诸如无功成分多、负序突出、谐波含量高等一系列电能质量问题。
The classification of power quality problems, their causing reasons, harm, and management methods are discussed in the paper.
本文讨论了电能质量问题的分类、产生原因、危害和解决方法。
So this paper mostly studies the algorithm of detecting voltage sag, voltage fluctuation and flicker in power quality problems.
因此，本论文确定将电能质量问题中的电压跌落和电压波动及闪变现象作为主要研究对象。
For the above reasons, the monitoring and analysis of power quality problems has been taken more and more seriously from all aspects.
鉴于上述种种原因，对电能质量的监测分析问题，越来越受到各个方面的重视。
This paper studied on the power quality problems and management options on the basis of computer monitoring system of the substation.
论文以变电站微机监测系统为基础，对变电站电能质量及治理方案进行研究。
In order to discover power quality problems and improve power quality, it is very necessary to study the monitoring device of power quality.
发现电能质量问题，提高电能质量，电能质量监测装置的研究很有必要。
The transient power quality problems become more important. Capacitor switching which brings transient disturbance is a common power quality event.
暂态电能质量问题日益突出，电容器投切造成的暂态扰动是其中较为常见的一种。
We summarized the theoretical basis of power quality problems which are caused by wind power and electrified railway, and summarized power quality standards.
对电气化铁路和风电场可能引起的电能质量问题的理论基础进行了综述，对当前国内外的电能质量标准进行了总结。
The electronic equipment is widely applied to aircraft electric power system, so power quality problems in AC main power supply system cause more and more attention.
在飞机电气系统中，随着电力电子装置的广泛应用，交流供电系统的电能质量问题受到越来越多的关注。
With the rapid increase of electric power load, especially the increase of unbalanced, impact and nonlinear loads, the power quality problems have been more and more serious.
随着电能在国民经济各部门中的广泛应用，用电负荷迅速增加，特别是不对称、冲击性、非线性负荷容量不断增长，电能质量的问题日益突出；
Various power quality problems and their harms in intelligent building were expounded. And two kinds of schemes for power quality monitoring in intelligent buildings were proposed.
对智能建筑中的各种电能质量问题及其危害进行了阐述，并提出了两种用于智能建筑中的电能质量监测方案。
Some current methods of calculation for power quality problems are summarized, especially a detailed analysis algorithm of the electrified railway based on AT equivalent circuit of the power flow.
对电能质量问题当前所应用的计算分析方法进行了总结，尤其详细讨论了电气化铁路计算中需要用到的基于AT等值电路的潮流算法。
Some current methods of calculation for power quality problems are summarized, especially a detailed analysis algorithm of the electrified railway based on AT equivalent circuit of the power flow.
对电能质量问题当前所应用的计算分析方法进行了总结，尤其详细讨论了电气化铁路计算中需要用到的基于AT等值电路的潮流算法。
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