It proves that the capability of wind generator is determined to slip , rotor voltage and angle between rotor voltage and stator voltage , and investigates the control model based on the stator field - oriented vector control 文中還分析了雙饋型風(fēng)力發(fā)電機(jī)的轉(zhuǎn)矩特性和穩(wěn)態(tài)特性,證明了發(fā)電機(jī)的性能由轉(zhuǎn)差率、轉(zhuǎn)子電壓和定轉(zhuǎn)子電壓間的相位角差決定的。
Just using the stator currents , stator voltages , and velocity , the method proposed in the paper makes real time identification of induction motor parameters based on the least squares identification algorithm . the method does n ' t use the rotor flux signal , avoiding the coupling between the rotor flux observation and the parameter identification 本文提出僅用電機(jī)的定子電流、電壓和轉(zhuǎn)速進(jìn)行電機(jī)參數(shù)的辨識(shí)方法,它利用遞推最小二乘法進(jìn)行在線參數(shù)辨識(shí),該方法不需要觀測(cè)得到的磁鏈信號(hào),消除了磁鏈觀測(cè)和參數(shù)辨識(shí)的耦合。
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。
For above purpose , we must synchronously and constantly acquire several signals , such as stator voltages , stator currents , rotor speed of asynchronous motor and so on , and synchronously save , dynamically display , fully analyze and process the acquired signals . apparently , the traditional measuring instruments ca n ' t satisfy these special requirements . if the digital storage oscilloscope is adopted to record data , it ca n ' t resolve two problems : the low storage capacity and the poor data analysis and process 為了達(dá)到上述目的,需要同步、長(zhǎng)時(shí)間地采集異步電機(jī)端部電壓信號(hào)、電流信號(hào)、電機(jī)轉(zhuǎn)速等多路信號(hào),并對(duì)采得的信號(hào)進(jìn)行實(shí)時(shí)存儲(chǔ)、動(dòng)態(tài)回放和分析處理,采用傳統(tǒng)測(cè)量?jī)x器已經(jīng)不能滿足這些要求,采用數(shù)字存儲(chǔ)示波器記錄數(shù)據(jù),存在存儲(chǔ)深度不夠及數(shù)據(jù)分析處理的問題。
The rotor velocity and position can be taken as two states variable of the system by using the ekf on the basis of the theory of the bldcm . based on the measured stator currents and stator voltages , we can estimate the rotor velocity and position . it is very useful for us to study the application of the velocity and position sensorless operation of brushless dc motor drives 在直流無刷電機(jī)的原理基礎(chǔ)上,利用擴(kuò)展卡爾曼濾波器將轉(zhuǎn)子轉(zhuǎn)速和位置看成系統(tǒng)的兩個(gè)狀態(tài)變量,根據(jù)定子側(cè)可測(cè)的電流、電壓值,逐步估計(jì)出轉(zhuǎn)子轉(zhuǎn)速和位置,為無速度和位置傳感器無刷直流電機(jī)控制系統(tǒng)打下基礎(chǔ)。