【摘要】：國家標準對并網(wǎng)風機在故障期間的低電壓穿越能力提出了技術(shù)要求,即能在電壓跌落一定范圍內(nèi)不脫網(wǎng)運行,并提供動態(tài)無功支撐。為了提高雙饋風電機組的低電壓穿越能力,提出了基于狀態(tài)相關(guān)Riccati方程(state-dependent Riccati equation,SDRE)的控制器。SDRE控制器具有靈活的設(shè)計方式,可以通過實時優(yōu)化狀態(tài)相關(guān)系數(shù)矩陣,提升暫態(tài)響應(yīng)性能,實現(xiàn)被控對象在較大范圍內(nèi)的漸近穩(wěn)定。針對雙饋風電機組設(shè)計了SDRE控制器,并通過與Crowbar的配合,實現(xiàn)了符合國家標準的低壓故障穿越策略。通過算例系統(tǒng)在三相故障下的仿真,驗證了所提控制策略相比常規(guī)PI控制策略以及故障期間持續(xù)投入Crowbar的策略,能夠更好地實現(xiàn)低電壓穿越。
[Abstract]:The national standard puts forward the technical requirements for the low voltage traversing ability of grid-connected fan during the fault period, that is, it can run within a certain range of voltage drop and provide dynamic reactive power support. In order to improve the low voltage traversing ability of doubly-fed wind turbine, a state dependent Riccati equation (state-dependent Riccati equation,SDRE) based controller. SDRE controller has a flexible design method, which can optimize the state correlation coefficient matrix in real time. The transient response performance is improved to achieve the asymptotic stability of the controlled object in a wide range. The SDRE controller is designed for doubly-fed wind turbine, and the low voltage fault traversing strategy is realized by cooperating with Crowbar. The simulation results show that the proposed control strategy can achieve low voltage traversing better than the conventional PI control strategy and the strategy of continuously putting Crowbar into the fault period.
【作者單位】： 電力系統(tǒng)及發(fā)電設(shè)備控制和仿真國家重點實驗室(清華大學電機系);西安交通大學電氣工程學院;陜西省地方電力設(shè)計研究院;
【基金】：國家自然科學基金委創(chuàng)新群體項目(51621065) 國家重點基礎(chǔ)研究發(fā)展計劃項目(973項目)(2013CB228201)~~
【分類號】：TM315
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本文編號：2215938