【摘要】：該文著重研究大規(guī)模集中并網(wǎng)的雙饋風(fēng)電基地故障后有功控制行為對(duì)系統(tǒng)暫態(tài)功角第二擺穩(wěn)定性的影響機(jī)理。首先基于靜態(tài)擴(kuò)展等面積定則,對(duì)雙饋感應(yīng)式風(fēng)機(jī)接入后系統(tǒng)的網(wǎng)絡(luò)節(jié)點(diǎn)電壓方程進(jìn)行改進(jìn),構(gòu)建適用于含風(fēng)電多機(jī)系統(tǒng)暫態(tài)功角穩(wěn)定性定量分析的等值單機(jī)無(wú)窮大系統(tǒng)模型;利用該模型對(duì)雙饋風(fēng)機(jī)與兩臺(tái)同步機(jī)互聯(lián)的簡(jiǎn)化系統(tǒng)進(jìn)行解析分析,分別給出風(fēng)電并網(wǎng)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(fēng)機(jī)有功出力低會(huì)降低第二擺穩(wěn)定性;進(jìn)一步分析風(fēng)電并網(wǎng)系統(tǒng)中功角第二擺穩(wěn)定性與第一擺穩(wěn)定性的關(guān)系,從整體上揭示風(fēng)機(jī)有功恢復(fù)速率變慢會(huì)使原本只會(huì)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(dǎo)致系統(tǒng)整體穩(wěn)定性下降;最后對(duì)機(jī)理分析進(jìn)行仿真驗(yàn)證。所做研究拓展了當(dāng)前風(fēng)電并網(wǎng)后只關(guān)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(fēng)電集中并網(wǎng)電力系統(tǒng)暫態(tài)穩(wěn)定控制提供理論指導(dǎo)。
[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(guó)家重點(diǎn)實(shí)驗(yàn)室(華北電力大學(xué));
【基金】：國(guó)家重點(diǎn)研發(fā)計(jì)劃項(xiàng)目課題(2016YFB0900105) 國(guó)家自然科學(xué)基金重大項(xiàng)目課題(51190103) 國(guó)家電網(wǎng)公司科技項(xiàng)目(大型風(fēng)電/光伏發(fā)電基地功率匯集與外送技術(shù)研究)~~
【分類號(hào)】：TM614;TM712

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本文編號(hào)：2218098