本文關(guān)鍵詞：多時(shí)間尺度下考慮機(jī)組變槳?jiǎng)幼鲀?yōu)化的風(fēng)電場有功控制系統(tǒng)研究　出處：《南京理工大學(xué)》2017年碩士論文　論文類型：學(xué)位論文

  更多相關(guān)文章： 風(fēng)電場 有功功率控制 變槳控制 轉(zhuǎn)速控制 有功分配 實(shí)時(shí)修正

【摘要】：隨著電網(wǎng)中風(fēng)電滲透率的不斷提高,為了應(yīng)對大規(guī)模風(fēng)電接入給電網(wǎng)有功調(diào)度和安全穩(wěn)定運(yùn)行帶來的巨大壓力和新的挑戰(zhàn),減小大規(guī)模風(fēng)電并網(wǎng)對電力系統(tǒng)調(diào)頻、調(diào)度的不利影響,提高電網(wǎng)對風(fēng)電的消納能力,有必要深入研究風(fēng)電場的有功功率控制策略,充分發(fā)掘風(fēng)電機(jī)組功率調(diào)節(jié)及參與電網(wǎng)輔助服務(wù)的能力。本文主要對風(fēng)電場有功控制系統(tǒng)中的機(jī)組有功控制系統(tǒng)和風(fēng)電場有功分配系統(tǒng)開展相關(guān)研究,具體工作如下:針對現(xiàn)有風(fēng)電機(jī)組有功控制策略在高風(fēng)速段會(huì)引起變槳系統(tǒng)頻繁動(dòng)作的問題,本文提出了基于轉(zhuǎn)速與槳矩協(xié)調(diào)控制的改進(jìn)有功控制策略,兼顧風(fēng)電機(jī)組功率調(diào)節(jié)效果與運(yùn)行工況。該方法充分利用風(fēng)機(jī)具備的高轉(zhuǎn)速調(diào)節(jié)裕度,優(yōu)先通過調(diào)節(jié)風(fēng)輪動(dòng)能平衡風(fēng)力機(jī)輸入/輸出的不平衡功率,從而能夠有效降低風(fēng)機(jī)在全風(fēng)速段的變槳?jiǎng)幼黝l率與幅度,減輕變槳機(jī)構(gòu)疲勞,延長風(fēng)機(jī)運(yùn)行壽命,最后在Matlab/Simulink仿真平臺(tái)中驗(yàn)證了所提新型風(fēng)電機(jī)組有功功率控制策略的有效性。針對由風(fēng)速波動(dòng)和預(yù)測誤差所引起的風(fēng)電場發(fā)電誤差的問題,本文在風(fēng)電場有功控制系統(tǒng)中提出了基于多時(shí)間尺度的雙層有功分配控制框架,包括長時(shí)間尺度上的上層全局優(yōu)化分配策略和短時(shí)間尺度上的下層實(shí)時(shí)修正控制策略。其中,全局優(yōu)化分配策略綜合考慮場內(nèi)各機(jī)組的預(yù)測信息,運(yùn)行狀態(tài)與控制特性等多方面影響因素,以風(fēng)電場發(fā)電誤差最小、風(fēng)機(jī)啟停次數(shù)最少和機(jī)組控制系統(tǒng)動(dòng)作次數(shù)最小構(gòu)建目標(biāo)函數(shù),制定各機(jī)組的優(yōu)化調(diào)度指令,實(shí)現(xiàn)風(fēng)電場經(jīng)濟(jì)運(yùn)行;實(shí)時(shí)修正控制策略在全局優(yōu)化分配策略的基礎(chǔ)上,針對由風(fēng)速波動(dòng)及調(diào)度指令過高所引起的機(jī)組有功出力不足,利用具有功率調(diào)節(jié)裕度的機(jī)組來緩解風(fēng)電場有功波動(dòng),實(shí)時(shí)調(diào)整機(jī)組的有功調(diào)度指令,進(jìn)而提高風(fēng)電場輸出功率的穩(wěn)定性與可靠性。最后,通過仿真算例對比對所提風(fēng)電場有功分配策略的有效性進(jìn)行了驗(yàn)證。
[Abstract]:With the increasing permeability of wind power in the power grid, in order to cope with the huge pressure and new challenges brought by large-scale wind power access to the grid active power dispatching and safe and stable operation. It is necessary to study the active power control strategy of wind farm in order to reduce the adverse effect of large-scale wind power grid connection on power system frequency modulation and dispatch, and to improve the absorption ability of wind power grid. Fully explore the power regulation of wind turbines and the ability to participate in the auxiliary service of power grid. This paper mainly studies the active power control system of wind farm and the distribution system of active power in wind farm. The specific work is as follows: in view of the problem that the active power control strategy of the existing wind turbine will cause the variable propeller system to move frequently in the high wind speed, this paper proposes an improved active power control strategy based on the coordinated control of rotational speed and propeller moment. The method makes full use of the high speed adjustment margin of the fan and balances the unbalanced power of the wind turbine input / output by regulating the kinetic energy of the wind turbine. Thus it can effectively reduce the frequency and amplitude of the variable propeller movement of the fan in the whole wind speed section, reduce the fatigue of the propeller mechanism, and prolong the running life of the fan. Finally, the effectiveness of the proposed active power control strategy for wind turbine is verified on the Matlab/Simulink simulation platform. The wind farm power generation error caused by wind speed fluctuation and prediction error is analyzed. The question. In this paper, a two-layer active power distribution control framework based on multi-time scale is proposed in the active power control system of wind farm. It includes global optimal allocation strategy for long time scale and real-time modified control strategy for lower layer on short time scale, in which global optimal allocation strategy synthetically takes into account the prediction information of each unit in the field. The operation state and control characteristics are affected by the minimum power generation error of wind farm, the minimum number of fan start and stop and the minimum number of actions of the unit control system to construct the objective function, and to formulate the optimal dispatching instructions of each unit. To realize the economic operation of wind farm; Real-time modified control strategy on the basis of global optimal allocation strategy, due to the fluctuation of wind speed and the excessive dispatch command, the generating unit has insufficient active power output. The active power fluctuation of wind farm can be alleviated by using the unit with power regulation margin, and the active power dispatching instruction of the unit can be adjusted in real time, thus improving the stability and reliability of the output power of the wind farm. Finally. The effectiveness of the proposed active power allocation strategy for wind farms is verified by a simulation example.
【學(xué)位授予單位】：南京理工大學(xué)
【學(xué)位級別】：碩士
【學(xué)位授予年份】：2017
【分類號(hào)】：TM614

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