At this range , the exit wound ought to be about the size of a small tangerine 在這個(gè)距離內(nèi)擊中你的話傷口應(yīng)該跟一只小橘子差不多大吧
This thesis shown that vscf ac exited wind power system with stator field - oriented vector control has a series of good performance and all the control schemes which had been introduced in this paper has its feasibility 本文研究結(jié)果表明,采用定子磁場定向矢量控制的交流勵(lì)磁風(fēng)力發(fā)電機(jī)系統(tǒng)具有許多優(yōu)越的性能,且本文采用的控制技術(shù)和進(jìn)行的控制相關(guān)分析都是可行的。
In this article a new type wind generator - ac exited wind generator is introduced which new technology scheme by the variable - speed constant - frequency methods at the present time . the thesis mostly studies the way of some control methods and analysis the characters of vscf wind power system 本文全面介紹了一種最新應(yīng)用于風(fēng)力發(fā)電的變速恒頻技術(shù)、基于變速恒頻技術(shù)的新型電機(jī)?交流勵(lì)磁發(fā)電機(jī)及交流勵(lì)磁風(fēng)力發(fā)電機(jī)系統(tǒng)的各種控制原理。
It also builds the mathematic model of all section of vscf ac exited wind power generation system on a - b - b and d - q coordinate system by the coordinate commutation technology . the thesis gives the characteristics of torque , active power , reactive power and the steady - state analysis of it . it proves that the capability of wind generator is determined to slip , the amplitude and phase of rotor voltage , the phase dispatch between stator voltage and rotor voltage 并分析了交流勵(lì)磁風(fēng)力發(fā)電機(jī)作變速恒頻運(yùn)行時(shí)的工作原理,闡述了與同步發(fā)電機(jī)、異步發(fā)電機(jī)的不同之處,分析了其能量平衡關(guān)系,在坐標(biāo)變換技術(shù)的幫助下,詳細(xì)推導(dǎo)了交流勵(lì)磁發(fā)電機(jī)在a - b - c坐標(biāo)系和d - q坐標(biāo)系下的數(shù)學(xué)模型,分析并仿真了其有功和無功特性、轉(zhuǎn)矩和功率調(diào)節(jié)特性、穩(wěn)態(tài)運(yùn)行和機(jī)械特性,證明了發(fā)電機(jī)的性能由轉(zhuǎn)差率、轉(zhuǎn)子電壓的相位和幅值、定轉(zhuǎn)子電壓相位差所決定的。
In lately years , people widely pay attention to wind energy because it is a regenerated cleanness energy . it began development in high rate 20 years before . it is a fact that the variable - speed constant - frequency ( vscf ) ac exited wind generator system is a main subject in the wind electric power generator schemes 近年來,風(fēng)能作為一種可再生的清潔能源日益受到世界各國的廣泛重視,風(fēng)力發(fā)電快速發(fā)展已有將近20年的歷史,其中基于變速恒頻技術(shù)的交流勵(lì)磁風(fēng)力發(fā)電機(jī)發(fā)電方案已經(jīng)是風(fēng)力發(fā)電中的一大重點(diǎn)課題。