harmonic sequence 中文意思是什麼
harmonic sequence
解釋
和聲模進-
Represent finite positive rational numbers by convergence subsequence of harmonic sequence numbers
利用調和數列的收斂子列表示有限正有理數 -
To resolve the situation that the sensitivity of present ground fault protection schemes is low for the large - sized hydro - generators, a kind of protection scheme based on the fault component of third - harmonic voltage and two kinds of protection scheme based on the fault component of zero - sequence voltage at the terminals and neutral are developed, and they can obtain higher sensitivity and reliability and provide 100 % protection for the stator windings. the influence of noise on the stator ground fault protection based on the local modulus maximum of wavelet transform is analyzed
針對目前大型水輪發電機定子繞組單相接地保護靈敏度偏低的問題，通過分析單相接地故障后機端和中性點零序電壓的變化特點，提出了一種基於機端和中性點三次諧波電壓故障分量和兩種基於機端和中性點零序電壓故障分量的高靈敏度、高可靠性保護方案，並實現定子繞組的100 %保護。 -
It includes four criterions of locating fault point ? “ transient zero sequence current amplitude law ”, “ stable base wave zero sequence current phase law ”, “ stable seventh harmonic zero sequence current phase law ” and “ s injection law ”. pointing out how the law locate the fault point to minimal fault section by applying these criterions gradually. the law will not only make up the blemishes existing in current methods for single - phase fault location in small current grounding system, but also locate the fault point to minimal fault isolating unit on fault line
該方法通過將所包含的四個定位判據- 「暫態零序電流幅值法」 、 「穩態基波零序電流方向法」 、 「穩態7次諧波零序電流方向法」和「 s信號注入法」 -進行有選擇地遞進使用，不僅有效彌補了目前已有小電流接地系統單相接地故障選線的缺陷，更將故障定位在故障線路最小故障區段。 -
This paper focuses on the control strategies to improve the performance of the three - phase ac - dc pwm voltage - source - converters ( vsr ) under unbalanced power supply. the problems such as negative sequences current, voltage and current harmonics and un - constant ( un - smooth ) power flow from ac to dc side are discussed in this paper. the analytical solutions for negative sequence current and harmonic current elimination are obtained by fully feed - forward of negative sequence voltage and producing a non - harmonic current command of the inner - loop
電網不平衡時，基於電網平衡為約束條件設計的三相vsr將出現不正常運行狀態，比如三相vsr交流電流中出現負序分量，使交流電流嚴重不對稱；直流電壓和交流電流中出現非特徵諧波分量，使直流電壓和交流電流波形發生嚴重畸變；三相vsr從電網吸收不平衡的瞬時功率等一系列問題。 -
This paper describes mainly system functions, measuring methods, circuit design, software program and errors analysis of a new type of measuring instrument. this instrument can measure and monitor electric parameters in single - phase circuits, three - phase ( three - wire or four - wire ) circuits. this system can be applied to electric devices and power plants, transformer substations with harmonic pollution. it can measure current, voltage, power, energy, frequence, power factor etc. it also can detect load quality, phase sequence, alarm, display and print results, as well as detect and dispose negative power
該儀器適用於含有諧波污染情況下的機電設備現場、發電廠、供電局、企業變電所現場，可用來測量電流、電壓、有功功率、無功功率、視在功率、有功電能、無功電能、視在電能以及頻率和功率因數等電參數，並具有負載性質（感性、容性）判別，正、逆相序判別指示功能；超限報警功能；列印記錄功能和負功檢測及處理功能。 -
On the basis of former research, drawing software neharpal. 0 is developed to analyze the negative phase sequence and harmonic of electric traction loads. neharpal
在既有成果的基礎上，開發了一套主要應用於電氣化鐵道牽引負荷負序、諧波滲透分析的電網圖形系統模擬軟體neharpa1 . 0 。 -
Tangyin substation is an important substation which has two transformer of 120mva, eight 220kv lines and three 110kv lines. tangqian line is a 110kv line specially for traction transformer substation. because traction load is high - power nonlinear and asymmetry. it will produce much harmonic and negatvie sequence current, which have done harm to compensation capacitors of tangyin substation. in recent years, the tang6c capacitor often interrupted and in 2001 july the tang7c capacitor ' s discharge pt exploded
湯陰變電站是豫北一座樞紐變電站，有2臺120mva的主變， 8條220kv線路和3條110kv線路，其中的湯牽線是專為牽引變電站供電的110kv線路。由於電力機車屬于大功率的非線性負荷，且三相不對稱，在其運行過程中必然會產生較大的高次諧波和負序電流。 -
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. due to the close loop structure, this method has quite good robustness, and can meet the requirement of the asymmetrical control of hvdc - vsc well
運用自適應干擾對消原理和空間矢量的概念，提出了一種基波正序分量、基波負序分量及諧波分量的自適應檢測方法，並進行了詳細的理論分析，為研究hvdc - vsc的不對稱運行控制奠定了基礎。 -
On the analysis of the theory of instantaneous reactive power, the paper brings forward a new harmonic detection method based on multiple frequency transform. the detection theory of positive sequence harmonic and negative sequence harmonic is respectively proved in detail. the correlative concepts are defined and the simulation validates the feasibility of this method
本文在分析瞬時無功功率理論的基礎上，提出了一種基於倍頻旋轉變換的諧波測量方法，分別針對正序和負序分量，從理論上證明了該方法能分離出單個的諧波，給出了相關量的定義，最後通過模擬驗證了該方法的有效性。 -
Abstract : applying the frequency - domain representation of the complex signals in a three - phase system, a harmonic detection method based on the in - phase correlation filtering was put forward in this paper, which can be used to detect effectively the generalized harmonics in the three - phase system except the fundamental of positive sequence
文摘:採用三相系統復信號的頻域表示並根據頻譜搬移原理，本文提出了一種基於同步相關濾波的諧波檢測方法，可用於三相電路中除正序基波以外廣義諧波的有效檢測。 -
It satisfies the requirements of china standard ( gb / t 14549 - 93 ), the harmonic and negative sequence component leaded by the input of electrified railways traction load are measured in si yan qiao substation. this thesis mainly analyzes the effects on the electric elements, feeding system losses, protection system and automatic device, and proposes corresponding schemes according to the problems occurring in si yan qiao substation
本文實測了瀘州石燕橋變電站電氣化鐵路牽引負荷注入電網的諧波和負序分量，著重分析了電力系統中電氣設備、供電網線損、繼電保護和自動裝置受電氣化鐵路諧波和負序的影響，並針對石燕橋變電站出現的問題提出了對策。 -
As a result, this paper gives a corresponding harmonic prevent me asure. finally, according to the asymmetrical characteristics of electrical traction loads, this paper studies the negative sequence currents under different loads and makes a piece of advice for reducing the negative sequence currents produced
最後，還根據電力牽引負荷三相不對稱的特點，分析了阻抗匹配平衡變壓器在不同負荷條件下的負序電流，對如何減小電力牽引負荷的負序電流提出了一點建議。 -
When zero sequence or high secondary harmonic current component appear in the circuit, the total current in the shield is zero, no electromagnetic interference with outside
當線路出現零序或高次諧波電流分量時，屏蔽層內電流總和為零，不對外界產生電磁干擾。 -
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
基於空間矢量的概念，提出了一種開環的基波正序分量、基波負序分量及諧波分量的實時檢測方法，這種方法可以看作是空間矢量的概念與傳統的基於濾波器的諧波檢測方法的結合，它能夠克服原有的基於濾波器的檢測方法的不足，可用於hvdc - vsc的不對稱運行控制。 -
The validity and superiority of all these are proved by use the parallel converter of novel upfc to implement reactive current compensation, zero sequence and negative sequence currents compensation, harmonic currents compensation and the mixed compensation of them. this thesis also studies that use novel upfc to implement two phases operating in high - voltage transmission lines by theory analyze and simulation testify
提出了基於多電平變換器的廣義大功率有害電流補償的概念，提出了適合於它的多環定時滯環控制方案，通過用新型upfc的並聯變換器實現無功補償、零序和負序補償、諧波補償及它們的綜合補償來驗證了其有效性和優越性。 -
In the second one, the input current displacement angle is dynamically modulated as a function of positive and negative sequence components of the input voltages. in both cases, the harmonic content has been evaluated analytically
第二種方法中，輸入電流矢量根據輸入電壓正、負序成分進行動態調制，並對兩種情況下的輸入電流的諧波成分都進行了分析。 -
It is revealed that the control commands from the filter are composed of a sequence of ramp signals, whose time - ratio of variation never exceeds the permissible value to restrain the excitation to un - modeled harmonic modes
研究結果表明，該濾波器形成的控制信號是一系列的斜坡信號，對時間的變化率不超過允許的最大沖擊值，從而降低了未建模動態激勵。 -
According to the present actual underground power system which neutral point is grounded through arc suppression coil in many supper big shaft, the development history and present situation of synthetic protection system used in hv flameproof switchgear are reviewed, and on the basis of analyzing the problems existed in high voltage flameproof switchgear, the selective leakage protective method based on the detecting harmonic direction of zero sequence current as well as the value of zero sequence voltage is proposed in this paper, and at the same time, harmonics extracting schematic and transforming circuit are also designed
本文深入系統地研究了基於intel80c196kb單片機控制的6kv防爆開關綜合保護系統，主要內容如下：針對大型及特大型礦井供電系統中性點普遍採用消弧線圈接地方式的現狀，回顧了國內外礦用高壓防爆開關保護系統的發展歷史，分析了目前國內高壓饋電開關保護系統所存在的問題，提出了「基於零序電壓基波啟動，五次諧波功率方向比較」的選擇性漏電保護原理，設計了相應的五次諧波提取電路和功率方向鑒別電路。 -
The results indicate that asvg not only can compensate reactive currents, but also can effectively filter the harmonic currents, negative sequence currents and zero sequence currents
模擬結果證明基於空間矢量調制的asvg既能夠補償不平衡系統的無功功率，同時又能夠有效地濾除系統中的諧波、負序和零序等有害電流。 -
This paper brings forward that asvg is capable of compensating harmonic, negative sequence and zero sequence currents. so asvg can synchronously compensate the reactive current and harmful currents in three - phase four - wire unbalanced system
本文提出靜止無功發生器還具有抑制諧波和濾除負序、零序電流的能力，從而可以用於對三相四線制不平衡系統同時進行無功補償和有害電流濾除。
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