發(fā)布時(shí)間：2018-03-26 17:32

  本文選題：雙饋發(fā)電機(jī)　切入點(diǎn)：廣義奈圭斯特判據(jù)　出處：《中國電機(jī)工程學(xué)報(bào)》2017年05期

【摘要】：弱電網(wǎng)條件下雙饋風(fēng)電機(jī)組控制系統(tǒng)與電網(wǎng)的交互影響目前得到了廣泛的關(guān)注,傳統(tǒng)的雙饋電機(jī)變流器控制系統(tǒng)設(shè)計(jì)中并沒有考慮電網(wǎng)阻抗的影響,因此該文采用阻抗分析方法分析了雙饋風(fēng)電變流器控制系統(tǒng)特性對雙饋發(fā)電機(jī)并網(wǎng)穩(wěn)定性的影響。首次在同步旋轉(zhuǎn)坐標(biāo)系下建立了考慮鎖相環(huán)影響的雙饋發(fā)電機(jī)輸入導(dǎo)納模型,建模過程中同時(shí)考慮了雙饋發(fā)電機(jī)的電磁暫態(tài)特性和轉(zhuǎn)子電流環(huán)控制器的影響。在此基礎(chǔ)上,詳細(xì)分析了鎖相環(huán)和電流環(huán)控制器參數(shù)變化對雙饋發(fā)電機(jī)輸入導(dǎo)納矩陣的影響。在所建模型的基礎(chǔ)上對弱電網(wǎng)連接情況下的雙饋發(fā)電機(jī)穩(wěn)定性進(jìn)行分析,利用廣義奈圭斯特穩(wěn)定判據(jù)分析電流環(huán)以及鎖相環(huán)PI參數(shù)對于系統(tǒng)穩(wěn)定性的影響,仿真結(jié)果驗(yàn)證了所建立模型和理論分析的正確性。
[Abstract]:At present, the interaction between the control system of doubly-fed wind turbine and the power grid has been paid more and more attention under the condition of weak grid, and the influence of grid impedance has not been taken into account in the traditional design of the control system of doubly-fed wind turbine converter. Therefore, the impedance analysis method is used to analyze the influence of the control system characteristics of the doubly-fed wind converter on the stability of the doubly-fed generator. The input admittance model of the doubly-fed generator considering the effect of phase-locked loop is established for the first time in the synchronous rotating coordinate system. The electromagnetic transient characteristics of doubly-fed generator and the influence of rotor current loop controller are considered in the modeling process. The influence of the parameters of PLL and current loop controller on the input admittance matrix of doubly-fed generator is analyzed in detail. The stability of doubly-fed generator under the condition of weak grid connection is analyzed on the basis of the established model. The influence of Pi parameters of current loop and phase locked loop on the stability of the system is analyzed by using the generalized Nigel stability criterion. The simulation results verify the correctness of the established model and the theoretical analysis.
【作者單位】： 哈爾濱工業(yè)大學(xué)電氣工程系;
【基金】：國家自然科學(xué)基金項(xiàng)目(51577040)~~
【分類號】：TM614

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本文編號：1668852