unit effective power 中文意思是什麼
unit effective power
解釋
機組有效功率-
Abstract : the effective shear stress of sediment transport is analyzed theoretically and tested by experimental data. the result shows that the effective shear stress is neither the overall shear stress nor the sand grain shear stress, but the geometric mean of these two stresses. the effective shear stress not only generalizes the flow intensity but also summarizes the flow intensities of mean flow velocity, stream power and unit stream power
文摘:本文通過理論分析及實測資料檢驗表明，無論對於何種泥沙運動狀態，決定泥沙運動的有效切應力既不是沙粒切應力又不是全部切應力，而是介於兩者之間，近似為沙粒切應力與全部切應力的幾何平均值.這一有效切應力不但是對切應力類水流強度指標的總結，還可以概括平均流速和水流功率等水流強度指標 -
The contributions done are as follows : according to the mathematical model of doubly fed motor and the theory of vector control, a unit power factor of rotor control scheme is proposed. in the doubly fed adjustment system, in order to control magnetic torque of motor this scheme is designed by controlling the reverse direction between rotor voltage and current to keep the vertical direction between rotor current and flux. it is known from theoretical analysis that for partly decoupling this scheme is only effective under sub - synchronization speed, but not control the system and obtain steady state since speed adjustment system ca n ' t adjust the magnitude of rotor flux under sup - synchronization
而傳統的無速度傳感器雙饋調速矢量控制系統，由於採用磁鏈定向方法，在同步速附近存在較大的工作死區，針對上述問題，本文做了如下的研究工作：本文從雙饋電機的數學模型出發，根據矢量控制的基本原理，提出了一種轉子側功率因數為1的雙饋電機矢量控制方案的設想，即在雙饋調速時採用轉子電流定向的方法，並控制外加轉子電壓與轉子電流始終反相，以保持了轉子電流與轉子磁鏈矢量垂直，通過控制轉子電流的大小來達到控制電機電磁轉矩的要求。 -
This paper introduces the development status of air cooling units both at home and overseas, as well as operating condition and effective factors of 200 mw air cooling units of fengzheng power plant, shows the developing direction, analysis theory and tool of thermal economics, at the same time, on the basis of this theory, using thermal economics analysis method to analyze and compute the unit exergy cost of 200mw air cooling units of fengzhen power plant under different working condition such as environmental temperature, wind speed, and draws aconclusion that the unit exergy cost increases as environmental temperature and wind speed increase
本文介紹了空冷機組國內外的發展狀況、豐鎮電廠200mw空冷機組的運行狀況和影響因素。闡述了熱經濟學的發展方向、分析理論和分析工具，並在此理論的基礎上，用熱經濟學分析的方法，對豐鎮電廠200mw空冷機組在環境溫度、環境風速各五種不同工況下的單位火用成本進行了分析計算，並得出了隨環境溫度、環境風速的增加單位火用成本增加的結論。 -
This paper firstly discusses the characteristics and advantages of the information transmission through sms provided by gsm network theoretically and systemically, discusses the necessity and possibility of the application of the technology into the power network detection information system, demonstrates the specifications and standards of the wireless communication interfaces used in the systems ; then, it demonstrates the constitution of the power network information system based on gsm network and the process of the operation of the system, based on this, proposes the project of one small size, cost - effective, convenient and high reliability remote detection and control unit
本文首先從理論上系統地論述了通過gsm網路提供的簡訊息服務sms進行信息傳輸的特點，討論了將該技術應用於電力網檢測信息系統中的可能性，對系統中用到的無線通信介面規范及標準進行了說明。闡述了基於gsm網路的電力網信息系統的組成，以及其工作過程。提出了一個體積小、經濟，方便用戶使用，可靠性高的遠端檢測控制單元實現方案。
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