查询词典 positive pole

A series ac voltage regulator based on a new fundamental positive sequence calculation method, which is utilized to generate the compensation voltage reference, is introduced in this paper.

针对串联型交流电压调节器，提出了一种新的基波正序计算方法以获取补偿电压的参考信号。

Therefore, the features of rotor and stator faults arise in the spectrum of the current Park vector in which the fundamental positive sequence component is filtered out.

也就是说，通过对旋转滤波后的电流Park矢量的频谱进行分析，就可以对电机的定转子故障同时进行监测。

Study and Simulation of Real-Time Detecting Method for Fundamental Positive Sequence, Negative Sequence and Harmonic components Based on Apace Vector.

基于空间矢量的基波正序、负序分量及谐波分量的实时检测方法。

In the thesis, an advanced synchronous detecting method is proposed, which replaces the phase voltage by fundamental positive sequence voltage.

本文通过对传统同步检测算法的改进，提出利用PARK变换提取三相基波正序电压来代替相电压，弥补传统算法的不足。

Based on the concept of space vector, an open loop detecting method for the fundamental negative and positive sequence components as well as the harmonic components is developed, which combining the conventional detecting method based on filters and the concept of space vector. This method can overcome the defaults of the conventional detecting method, and can meet the requirement of the asymmetrical control of HVDC-VSC.

运用自适应干扰对消原理和空间矢量的概念，提出了一种基波正序分量、基波负序分量及谐波分量的自适应检测方法，并进行了详细的理论分析，为研究HVDC-VSC的不对称运行控制奠定了基础。

Based on the adaptive interference canceling theory and the concept of space vector, an adaptive fundamental positive/negative sequence component and harmonic component detecting method is developed.

浙江人学博t学位论义摘要以HVDC－VSC的暂态数学模型为基础，建立了HVDC－VSC的等效仿真模型。

However, because of the positive sequence of fundamental frequency, there are still some shortages for wavelet transform in the use of harmonic measurement of three-phase dissymmetrical system. A new approach of harmonic measurement based on Period-interleaving of MALLAT arithmetic for dissymmetrical system is put forward. Analysis and experiment based on TMS320LF2407 Digital Signal Processor are made. And the result of experiment reveals that the proposed method based on Period-interleaving is valid in the use of harmonic measurement of three-phase dissymmetrical system.

但是，目前小波变换在三相不对称系统的谐波检测中存在着无法分离基波正序信号的不足，本文就此提出了一种用于三相不对称系统的基于周期交错的小波MALLAT多分辨率分解的测量方法，详细介绍了该算法的原理、流程及计算公式，同时以TMS320LF2407数字信号处理器为核心建立了实验系统对该算法进行了实验，实验结果证明该周期交错－小波变换算法可以有效地检测出三相不对称系统中的有害电流。

As a result, the feature frequency components of rotor broken bar fault, hiding behind the fundamental positive sequence component, emerge in the spectrum now.

由于滤除了基波正序分量，在频谱图上，被基波正序分量掩盖的断条故障特征就显示出来了。

An optimal filter is designed specially for dq transform used in the voltage mea-surement of transfer switch,which is composed of lower-order notch filter and lower-order low pass filter with higher cut-off frequency in series.Its transfer function is presented by theoretical derivation.If the order is same,it is better in measuring the positive sequence of fundamental amplitude than the average filter and the low-pass filter.

针对转换开关电压检测法——dq变换设计了优化滤波器，该滤波器是利用低阶陷波滤波器和较高截止频率低阶低通滤波器串联形成的，通过理论推导给出了该滤波器的传递函数，在相同的滤波阶数下，该优化数字滤波器在提取基波正序幅值的性能比较中，优于平均值滤波法及低通数字滤波器法等。

At present, China's economic fundamentals, enhance the positive 4,000,000,000,000 yuan to stimulate economic efficiency of the implementation of the program, a fundamental solution to China's final demand, China's economy to reduce the risk down is the stability of China's capital market lies.

目前，中国的经济基本面，提高正面4，000，000，000，000元刺激的程序，从根本上解决中国的经济最终需求的执行效率，中国的经济以降低风险降低，是中国资本市场的稳定，关键在于。

This was not understood at the time, and therefore went unaddressed, until ascension became so distorted that we chose to stop ascending and wait for a time when all records would be revealed.

这在当时没有被了解，因此进行着无改编，直到提升变得如此扭曲，我们选择去停止提升并等待所有记录能被揭示的那一天。

The attack＇s nuisance value is increased because mobile phone networks also send notifications of new voicemail by sms,so an attacked phone may stop advising of new voice messages too,it warned.

它警告：这种攻击的危害增长是因为移动电话网络也会通过短信发送新语音邮件的通知。所以受到攻击的手机可也以停止新的语音信息的提示。