本文選題：風(fēng)火打捆　切入點(diǎn)：交直流外送　出處：《東北電力大學(xué)》2014年碩士論文

【摘要】：大力發(fā)展新能源是我國未來能源開發(fā)的主要戰(zhàn)略方向。隨著新能源的開發(fā)建設(shè)，作為新能源領(lǐng)域中最成熟、最具開發(fā)規(guī)模和商業(yè)化應(yīng)用前景的發(fā)電方式之一，風(fēng)力發(fā)電在電源結(jié)構(gòu)將占據(jù)越來越大的比重。本文基于風(fēng)火打捆交直流外送典型輸電模式，定位于風(fēng)火打捆的送端電網(wǎng)，，針對直流閉鎖后大容量冗余功率的轉(zhuǎn)移沖擊給系統(tǒng)帶來的暫態(tài)穩(wěn)定問題，研究風(fēng)火交互耦合作用對電網(wǎng)暫態(tài)穩(wěn)定性的影響，并提出強(qiáng)化此場景下系統(tǒng)安全性的優(yōu)化措施。 首先基于PSD-BPA電力系統(tǒng)仿真軟件，建立了能夠表征風(fēng)火打捆外送系統(tǒng)基本特性的數(shù)學(xué)模型，并用該模型仿真分析了多種邊界條件下系統(tǒng)的穩(wěn)定性。然后采用EEAC法則與不平衡能量動(dòng)力學(xué)理論，分析了風(fēng)火打捆交直流外送場景下直流閉鎖故障引發(fā)的暫態(tài)失穩(wěn)機(jī)理。提出了表征暫態(tài)穩(wěn)定程度的量化描述；分析了多種邊界條件下暫態(tài)穩(wěn)定性的差異；剖析了風(fēng)火耦合作用影響暫態(tài)穩(wěn)定性的關(guān)鍵因素。再次在分析典型系統(tǒng)基礎(chǔ)上，針對實(shí)際電網(wǎng)開展了進(jìn)一步研究。結(jié)合西北電網(wǎng)風(fēng)火打捆交直流外送實(shí)際情況，重點(diǎn)研究哈鄭直流閉鎖故障下的系統(tǒng)穩(wěn)定性，仿真分析了風(fēng)電恒功率因數(shù)控制條件下風(fēng)火不同比例對外送安全穩(wěn)定性的影響；分析了風(fēng)電場配置的動(dòng)態(tài)無功補(bǔ)償對暫態(tài)穩(wěn)定的動(dòng)態(tài)支撐作用。最后針對哈密風(fēng)火打捆外送場景下特高壓直流閉鎖存在的失穩(wěn)風(fēng)險(xiǎn)，充分發(fā)揮電網(wǎng)中多種安控手段的作用，研究了直流功率緊急提升、外送交流通道配置的可控高抗等FACTS的緊急控制以及切常規(guī)火電、風(fēng)電機(jī)組等綜合性控制措施，對控制效果進(jìn)行了仿真驗(yàn)證。 本文的研究成果為我國風(fēng)火打捆大型能源基地高壓交直流外送安全穩(wěn)定運(yùn)行提供了參考。
[Abstract]:Vigorously developing new energy is the main strategic direction of our country's energy development in the future.With the development and construction of new energy, wind power generation will occupy more and more proportion in the power supply structure as one of the most mature, most developed and commercialized power generation methods in the field of new energy.Based on the typical AC / DC transmission mode of wind and fire bundles, this paper is aimed at the transient stability of the power transmission system caused by the transfer of large capacity redundant power after DC locking.The effect of wind and fire interaction on the transient stability of power network is studied, and the optimization measures to enhance the system security in this scenario are proposed.Firstly, based on the PSD-BPA power system simulation software, a mathematical model is established to characterize the basic characteristics of the wind and fire bundles delivery system, and the stability of the system under various boundary conditions is analyzed by using the model.Then the mechanism of transient instability caused by wind and fire bundled AC / DC outputting is analyzed by using EEAC's rule and unbalanced energy dynamics theory.A quantitative description of the degree of transient stability is proposed, the differences of transient stability under various boundary conditions are analyzed, and the key factors that influence the transient stability of the wind-fire coupling are analyzed.Based on the analysis of the typical system, further research is carried out on the actual power grid.Combined with the actual situation of wind and fire bundled AC / DC outputting in Northwest Power Grid, the system stability of Ha-Zheng DC lock-in fault is studied emphatically, and the influence of different proportion of wind and fire on the safety and stability of external transmission under the condition of constant power factor control of wind power is simulated and analyzed.The dynamic supporting effect of dynamic reactive power compensation for wind farm configuration on transient stability is analyzed.Finally, aiming at the risk of instability of UHV DC latch in Hami wind and fire bundles, the paper gives full play to the role of various safety control methods in power grid, and studies the emergency enhancement of DC power.The emergency control of FACTS with controllable high reactance and integrated control measures such as cutting conventional thermal power and wind turbine with outgoing AC channel are verified by simulation.The research results in this paper provide a reference for the safe and stable operation of high voltage AC / DC outputting in large energy base of wind and fire binding in China.
【學(xué)位授予單位】：東北電力大學(xué)
【學(xué)位級別】：碩士
【學(xué)位授予年份】：2014
【分類號】：TM614

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