【摘要】：該文著重研究大規(guī)模集中并網的雙饋風電基地故障后有功控制行為對系統(tǒng)暫態(tài)功角第二擺穩(wěn)定性的影響機理。首先基于靜態(tài)擴展等面積定則,對雙饋感應式風機接入后系統(tǒng)的網絡節(jié)點電壓方程進行改進,構建適用于含風電多機系統(tǒng)暫態(tài)功角穩(wěn)定性定量分析的等值單機無窮大系統(tǒng)模型;利用該模型對雙饋風機與兩臺同步機互聯(lián)的簡化系統(tǒng)進行解析分析,分別給出風電并網系統(tǒng)暫態(tài)功角第二擺失穩(wěn)的充分條件、必要條件,揭示出故障后風機有功出力低會降低第二擺穩(wěn)定性;進一步分析風電并網系統(tǒng)中功角第二擺穩(wěn)定性與第一擺穩(wěn)定性的關系,從整體上揭示風機有功恢復速率變慢會使原本只會出現(xiàn)首擺失穩(wěn)的系統(tǒng)發(fā)生第二擺失穩(wěn),并最終導致系統(tǒng)整體穩(wěn)定性下降;最后對機理分析進行仿真驗證。所做研究拓展了當前風電并網后只關注首擺失穩(wěn)的暫態(tài)功角穩(wěn)定性分析方法,為大規(guī)模風電集中并網電力系統(tǒng)暫態(tài)穩(wěn)定控制提供理論指導。
[Abstract]:This paper focuses on the influence of active power control behavior on the stability of the second pendulum in the transient power angle of a large scale centralized grid-connected wind power station. Firstly, based on the static expansion equal-area rule, the network node voltage equation is improved after the doubly-fed induction fan is connected into the system, and the equivalent single-machine infinite bus system model suitable for quantitative analysis of transient power angle stability of multi-generator system with wind power is constructed. By using this model, the simplified system interconnected with two synchronous machines is analytically analyzed, and the sufficient conditions and necessary conditions for the second pendulum instability of the transient power angle of the wind power grid connected system are given, respectively. It is revealed that the stability of the second pendulum will be reduced by the low active power output of the fan after failure, and the relationship between the stability of the second pendulum at the power angle and the stability of the first pendulum in the wind power grid-connected system is further analyzed. As a whole, it is revealed that the slow recovery rate of the active power of the fan will cause the second swing instability of the original system which only occurs in the first swing instability, and eventually lead to the overall stability of the system. Finally, the mechanism analysis is verified by simulation. The research extends the transient power angle stability analysis method which only pays attention to the first swing instability after wind power grid connection, and provides theoretical guidance for large-scale wind power centralized grid-connected power system transient stability control.
【作者單位】： 新能源電力系統(tǒng)國家重點實驗室(華北電力大學);
【基金】：國家重點研發(fā)計劃項目課題(2016YFB0900105) 國家自然科學基金重大項目課題(51190103) 國家電網公司科技項目(大型風電/光伏發(fā)電基地功率匯集與外送技術研究)~~
【分類號】：TM614;TM712

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1 梁振光;發(fā)電機功角的實時計算方法[J];繼電器;2004年01期

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本文編號：2218098