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。
A novel approach on power quality disturbance detection is presented in this paper.
提出了一种新的电能质量扰动识别与定位方法。
Two critical parameters of power quality are run-time voltage and harmonic components.
电能质量中的两个重要参数是运行电压和谐波状况。
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。
It is pointed out that the main aspect of electric power quality problem is voltage sag.
指出电压暂降是现代电能质量的主要问题。
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。
There are several power quality issues such as power surges, voltage sags, outages, harmonics, etc.
电能质量问题包括以下几种：电涌、电压闪变、断电、谐波等。
How to use transformer to improve the stability of power system and the power quality is concerned.
如何利用变压器提高系统运行稳定性和用户端电能质量一直是电力工程关注的问题。
The main circuit of Power Quality Compensator (PQC) for distribution system is studied in this paper.
对配电系统电能质量补偿装置的主电路进行了研究。
The suboptimal controlling method which meets the requirement of IEEE transient power quality is given.
在满足IEEE暂态电能质量条件下，实现下行信号系统准最优控制。
Reliability of power supply and power quality are always the concerns of customers and power departments.
供电可靠性及电能质量一直是用户和供电部门密切关注的问题。
Harmonic is the most general phenomenon in power system. And harmonic is the main index of power quality.
谐波是目前电力系统中存在的最普遍现象，是电能质量的主要指标。
The third part introduces and compares analytic methods of the power quality and their application ranges.
文章第三部分对电能质量的各种分析算法的原理和适用范围进行了介绍，并做了对比。
This paper presents a Support Vector Machine (SVM) method for classification of dynamic power quality disturbances.
论文将支持向量机引入到动态电能质量分类问题中。
Power quality disturbance classification based on time domain, rule based and wavelet multi - resolution decomposition.
基于时域、多分辨率分析和规则基的电能质量扰动分类。
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。
This thesis focuses on the application of Electronic Design Automation technology in the field of power quality monitoring.
本论文研究的是电子设计自动化技术在电能质量监测中的应用。
This dissertation discusses at first the concept of the power quality and analyses the main parameters of the power quality.
本文首先阐明了电能质量的概念，对电能质量的主要参数进行分析。
The above factors make the power quality declining, and have seriously influenced the normal production and living of people.
以上因素造成电能质量的下降，并严重影响了人们的正常生产和生活。
Series power quality controller (SPQC) is an advanced power electronics device to improve the power quality of supply utility.
串联型电能质量控制器是一种可以有效提高用户端供电质量的电力电子装置。
The new method gives a entirely new way for detection, identification and classification of dynamic power quality disturbances.
该文方法为动态电能质量扰动的检测、识别与分类提供了新的思路。
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。
Reactive power optimization is an effective measure to assure the security, improve power quality and benefit of power systems.
进行无功优化是确保电力系统安全性、提高供电质量和经济效益的有效措施。
After SVC was put into operation, power quality problem caused by harmonic current, voltage fluctuation and flicker has been solved.
SVC投入运行后，对非线性负荷产生的谐波电流，电压波动及闪变等引起供电电能质量的问题起到了很好的治理效果。
Unified power quality controller (UPQC) is a new device for custom power. It can provide multiple power quality regulation functions.
统一电能质量控制器(UPQC)是用户电力技术中的新兴装置，它能统一实现多重电能质量调节功能。
The power quality technique is constructed of power quality standards, testing analyzing power quality and the control of power quality.
电能质量技术包括电能质量标准、电能质量测试分析、电能质量控制三个方面的内容。
As a new control device of power quality, Unified power quality Conditioner (UPQC) is an important research aspect of power electronics.
统一电能质量调节器(UPQC)作为一种新型的电能质量控制装置，成为近几年电力电子专业研究的热点。
Aiming at the need of power quality monitoring, the power quality monitoring system based on DSP is designed and developed in this paper.
针对电能质量监测的需要，本文利用DSP技术对电能质量监测系统进行了研究和开发。
And these eigenvalues can be used as the input vectors of the artificial neural network to classify the power quality signals effectively.
将这些特征量作为神经网络的输入可以实现电能质量的辨识。
The power quality becomes more and more important and close attention is gradually paid to power quality by electric industry and consumers.
电能质量问题越来越显示其重要性，电力部门和用户对电能质量的关注也日益增加。
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