本文選題：協(xié)調(diào)控制技術 + 多電源聯(lián)合運行��； 參考：《華北電力大學》2017年碩士論文

【摘要】：近年來,我國的清潔能源發(fā)電技術得到了快速發(fā)展。然而,電網(wǎng)故障或擾動引發(fā)的清潔能源大面積無序脫網(wǎng)問題一直未能得到妥善的解決,這可能會惡化電網(wǎng)電壓和頻率,甚至造成更嚴重的電網(wǎng)事故。本文針對上述問題,結(jié)合清潔能源和常規(guī)能源的電源特性,提出了多電源聯(lián)合運行的協(xié)調(diào)控制分析流程,并從電源運行和保護兩大方面對實際電網(wǎng)風電和火電的聯(lián)合運行提出了協(xié)調(diào)控制措施,減少了故障下風電脫網(wǎng)的容量損失,提升了電網(wǎng)的安全穩(wěn)定水平。本文首先結(jié)合工程背景和電源特性構建了多類型電源相互影響的目標函數(shù),分析了約束條件,在此基礎上提出了多電源聯(lián)合運行的協(xié)調(diào)控制分析流程圖,分為關系構建模塊、電源運行條件協(xié)調(diào)控制模塊和電源保護參數(shù)協(xié)調(diào)控制模塊三大模塊進行分析。該流程既可全面反映大電網(wǎng)各個電源基地之間的相互影響關系,發(fā)現(xiàn)電網(wǎng)運行過程中的潛在問題,又能有效確定合理的協(xié)調(diào)控制措施。接著提出了電源基地運行條件的協(xié)調(diào)控制措施。利用PSD-BPA軟件在西北電網(wǎng)中仿真分析得到了河西走廊風電比例的上升會使電網(wǎng)安全穩(wěn)定水平下降的影響規(guī)律,提出了適當增大酒泉火電出力和減小酒泉火電機端電壓的協(xié)調(diào)控制措施。仿真結(jié)果表明,該措施能有效緩解簡單故障下河西走廊風電基地電壓驟升的現(xiàn)象,使風電過電壓脫網(wǎng)容量有了明顯的下降。最后提出了電源基地保護參數(shù)的協(xié)調(diào)控制措施。在簡單和嚴重故障下分析風電高電壓穿越技術對風電過電壓脫網(wǎng)的不同影響,針對嚴重故障下風電高電壓穿越技術可能導致風電高頻脫網(wǎng)容量增多的問題,提出了協(xié)調(diào)控制火電汽輪機超速保護參數(shù)的想法。利用PSD-BPA軟件仿真分析西北電網(wǎng)酒泉火電汽輪機超速保護對玉門風電高頻脫網(wǎng)的影響過程,提出了協(xié)調(diào)控制火電汽輪機保護動作持續(xù)時間和轉(zhuǎn)速設定值的措施。仿真結(jié)果表明,酒泉火電汽輪機超速保護的協(xié)調(diào)控制措施能有效避免嚴重故障下玉門風電脫網(wǎng)事故的發(fā)生,提高了電力系統(tǒng)風火聯(lián)合運行的安全穩(wěn)定性水平。本文提出的多電源聯(lián)合運行的協(xié)調(diào)控制分析流程適用于大電網(wǎng),既能全面而有效評估各電源基地間的相互影響關系,又能發(fā)現(xiàn)和解決電網(wǎng)運行過程中的潛在問題,實現(xiàn)清潔能源和常規(guī)能源的協(xié)調(diào)控制,減少了清潔能源無序脫網(wǎng)的容量損失,維持了電網(wǎng)安全穩(wěn)定運行,并能在西北電網(wǎng)得到較好的運用。
[Abstract]:In recent years, clean energy power generation technology has developed rapidly in China. However, the problem of large-scale disorderly decoupling of clean energy caused by power grid failures or disturbances has not been properly resolved, which may worsen the voltage and frequency of the power network, and even cause more serious power network accidents. In view of the above problems, combined with the characteristics of clean energy and conventional energy, this paper proposes a coordinated control analysis flow of combined operation of multiple power sources. The coordinated control measures for the combined operation of wind power and thermal power in actual power grid are put forward from two aspects of power supply operation and protection, which can reduce the loss of wind power capacity under the fault and improve the safety and stability level of the power network. In this paper, the object function of multi-type power supply interaction is constructed based on engineering background and power supply characteristics, and the constraint conditions are analyzed. On this basis, the coordinated control analysis flow chart of multi-power joint operation is proposed, which is divided into relation building module. The power operation condition coordination control module and the power protection parameter coordination control module are analyzed. This process can not only fully reflect the interaction between the power supply bases of large power grid, but also find out the potential problems in the operation of the power network, and can effectively determine the reasonable coordinated control measures. Then the coordinated control measures of the operation conditions of the power supply base are put forward. By using PSD-BPA software in Northwest Power Grid, the influence law of increasing wind power ratio in Hexi Corridor will decrease the level of safety and stability of power network is obtained. The coordinated control measures of increasing the output power of Jiuquan thermal power and reducing the terminal voltage of Jiuquan fire motor are put forward. The simulation results show that this measure can effectively alleviate the phenomenon of sudden rise of wind power base voltage in Hexi Corridor under simple fault, and make the overvoltage de-grid capacity of wind power decrease obviously. Finally, the coordinated control measures for the protection parameters of the power supply base are put forward. This paper analyzes the different influences of wind power high-voltage traversing technology on wind power overvoltage de-grid under simple and serious faults. In view of the problem that wind power high-voltage traversing technology may lead to the increase of wind power high-frequency de-grid capacity under severe fault, The idea of coordinated control of overspeed protection parameters of thermal power turbine is put forward. By using PSD-BPA software, the influence of excessive speed protection of steam turbine of Jiuquan thermal power plant in Northwest Power Grid on the high frequency decoupling of Yumen wind power is analyzed, and the measures of coordinated control of the operation duration and speed setting value of thermal power turbine protection are put forward. The simulation results show that the coordinated control measures of steam turbine overspeed protection in Jiuquan thermal power plant can effectively avoid the occurrence of off-grid accidents in Yumen wind power plant under serious faults and improve the safety and stability level of the combined operation of wind and fire in power system. The coordinated control analysis flow proposed in this paper is suitable for large power networks. It can not only comprehensively and effectively evaluate the interaction between power supply bases, but also find and solve the potential problems in the operation of power grid. The coordinated control of clean energy and conventional energy can reduce the loss of capacity of disorderly decoupling of clean energy, maintain the safe and stable operation of power grid, and be well applied in Northwest Power Grid.
【學位授予單位】：華北電力大學
【學位級別】：碩士
【學位授予年份】：2017
【分類號】：TM732

【參考文獻】

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本文編號：2082421