勵磁容量 的英文怎麼說
中文拼音 [lìcíróngliáng]
勵磁容量
英文
excitation capacity-
Based on netomac, a software package for power system simulation, the model and algorithm of pre - dispatch schedule in generation markets, excitation system parameter setting, and power system small signal stability anaylsis are studied in this thesis. the main work is as follows : a model of pre - dispatch schedule is proposed, whose target is to minimize the market purchasing price ( mpp ) in the whole pre - dispatch period. then according to the characteristics of pre - dispatch schedule, the model of pre - dispatch schedule is simplified to minimize the mpp in each pre - dispatch time, and a three - step algorithm of pre - dispatch schedule is designed : dealing with the optimal problem in the whole period of pre - dispatch with static planning method, solving the problem of combination of machines with pr1 method, resolving problem of optimal power flow ( opf ) with modified powell method
本文基於netomac模擬軟體，以發電市場預調度計劃模型及演算法、勵磁系統參數整定和電力系統小擾動穩定性分析為研究內容，主要做了以下工作：建立了以整個預調度計劃周期內的市場購電價格最小為目標的發電市場預調度計劃模型，並根據預調度計劃問題狀態數多、變量多、混合整數、非解析的特點，將預調度計劃模型的目標函數簡化為各時段的市場清算電價最小，設計了三段式預調度演算法：用靜態規劃法求解整個預調度計劃周期內的優化問題；用優先級法求解機組組合問題；用改進的powell法求解最優潮流問題。The main achievements of the thesis are as follows : ( 1 ) kinds of techniques to detect magnetizing inrush of traction transformers are thoroughly investigated in this paper, and their limitation are indicated and corresponding improvement techniques are proposed. ( 2 ) in this paper, flux linkage equilibriun equations are used to build " ash - box " models of some traction transformers based on system identification, such as two - winding single - phase traction transformer, impedance - matching equilibriun traction transformer and scott traction transformer
論文的主要內容有： （ 1 ）詳盡分析了現有的針對牽引變壓器勵磁涌流演算法的保護演算法，提出了每種演算法的局限性及其改進方法； （ 2 ）提出適用於鐵道電氣化系統中各種牽引變壓器對應的三?二相轉換規則，利用該規則可將對應量的轉換置於保護軟體中，從而可大大減輕在牽引變壓器兩端外部復雜的接線。In order to make the full use of the facility to maintain the machine rotating system, the alternative excitation setting, which remains by altering the excitation setting, is changed into subsidiary generator running on the same shaft. and it can enhance the work capacity of the whole unit
為了充分利用設備，保持原機組的機械旋轉系統狀態，現將勵磁系統改造后空余出的交流勵磁機改為同軸運轉的副發電機，增加整體機組的工作容量。Based on the analysis of the control theory of the dtc of doubly fed induction machines, in this paper, two control schemes are proposed : the least mode of rotor current and the stator power factor adjustable mode. in the first control scheme, we may make the rotor voltage the same or opposite phase with the rotor current by throwing suitable rotor voltage vector
在第一種控制方案中，通過施加轉子電壓矢量，使轉子電流與轉子磁鏈垂直，轉子勵磁全靠定子電流，即可保證轉子電流和轉子電壓同相或反相，從而實現了轉子側功率因數為1 ，可減小轉子側變頻器的容量。The effect on the generator excitation magnetic field is different when the capacity and power factor of load are different, and the effect on the internal impedance voltage drop is different, too
而不同容量的負載，以及負載的不同功率因數，對同步發電機勵磁磁場的作用是不同的，對同步發電機的內部阻抗壓降的作用也是不一樣的。The load is changing when the dynamo is normal. the effect to the dynamo excitation magnetic field is different when the capacity and power factor is different. the intemal anpedance voltage drop is different
而不同容量的負載，以及負載的不同功率因數，對同步發電機勵磁磁場的反映作用是不同的，對同步發電機的內部阻抗壓降也是不一樣的。As an advanced power generation and adjusting speed technology of a. c motor, a. c excited machines ( acem ) can be applied in power generation using a variable - speed constant - frequency scheme to produce electricity, in a pumped - storage hydraulic power plants, and in high rate variable speed drive fields
交流勵磁技術是一種先進的交流電機發電及調速技術，可用於變速恆頻發電、抽水蓄能電站和大容量調速場合，能實現電機有功功率、無功功率的獨立調節和功率因數控制。Steady state performance of brushless doubly - fed machines for adjustable speed drives
雙饋交流勵磁變速電機的穩態特性及勵磁容量分析But with the development of electric power industry, the capability of each kind of electric machine increases quickly. accordingly, the voltage and the power of excitation increase
但隨著電力工業的發展，各種類型的電機的單機容量日益增長，勵磁電壓和功率隨之增大。The adjustable speed control technique can make the capacity of converter and system cost and the complexity of control technique decrease
通過控制轉子繞組勵磁電流的頻率來調節轉速，可使變流器的容量減小，降低調速成本和控制技術的復雜性。分享友人