本文選題：風力發(fā)電 + 系統(tǒng)調(diào)峰��； 參考：《長沙理工大學》2014年碩士論文

【摘要】：為解決能源緊缺和環(huán)境污染問題,風力發(fā)電以其無污染、資源豐富等優(yōu)勢而得到快速發(fā)展。然而,由于風能受不斷變化的天氣條件影響,風力發(fā)電表現(xiàn)出很強的間歇性、隨機性、反調(diào)峰特性。隨著風電大規(guī)模并網(wǎng),風電功率的不確定性會使系統(tǒng)調(diào)峰難度增加,甚至威脅到電力系統(tǒng)的安全穩(wěn)定運行�？紤]到魯棒優(yōu)化方法無需假設隨機變量的分布函數(shù),且優(yōu)化結(jié)果的穩(wěn)定性好。因此,本文基于魯棒優(yōu)化理論研究了大規(guī)模風電接入后電力系統(tǒng)的調(diào)峰問題。風電大規(guī)模接入會導致系統(tǒng)的調(diào)峰需求大幅增加,抽水蓄能機組具有良好的調(diào)峰特性,為此建立考慮抽水蓄能的電力系統(tǒng)調(diào)峰模型。采用原始-對偶內(nèi)點法對該模型進行求解�；贏MPL仿真平臺,以改進的IEEE-14節(jié)點系統(tǒng)進行算例分析,算例表明抽水蓄能機組參與出力分配后會使系統(tǒng)等效負荷峰谷差率變小,減少了負荷高峰時段機組的開機數(shù)量,降低了系統(tǒng)的運行成本�？紤]風力發(fā)電的隨機特性,將風電功率的估計值與實際值之間的偏差定義為風電擾動功率�；隰敯魞�(yōu)化理論,以盒式不確定集刻畫風電功率的擾動范圍,構(gòu)建計及不確定風電出力的線路安全約束,由此提出考慮不確定風電功率的電力系統(tǒng)盒式魯棒調(diào)峰模型。運用對偶原理簡化該模型,將其轉(zhuǎn)化為可計算的確定性非線性規(guī)劃問題。最后,以改進的IEEE-14節(jié)點系統(tǒng)進行算例分析,算例表明當風電功率的擾動范圍增大到一定程度時,為保證線路的運行安全,機組需重新分配出力,致使系統(tǒng)運行成本增加。進一步考慮負荷的隨機性,基于魯棒優(yōu)化理論,以盒式不確定集刻畫負荷和風電功率的擾動范圍,構(gòu)建計及不確定負荷和風電功率的線路安全約束,進而提出考慮不確定負荷和風電功率的電力系統(tǒng)盒式魯棒調(diào)峰模型。并通過仿真計算得到了取不同風電功率和負荷的擾動范圍時各機組出力情況和系統(tǒng)運行成本,從而為風電并網(wǎng)后電力系統(tǒng)的調(diào)峰問題提供了重要參考。
[Abstract]:In order to solve the problem of energy shortage and environmental pollution, wind power generation has been developed rapidly because of its advantages of no pollution and abundant resources.However, wind energy is affected by changing weather conditions, and wind power generation shows strong intermittent, randomness and anti-peak-shaving characteristics.With the large-scale grid connection of wind power, the uncertainty of wind power will increase the difficulty of peak regulation, and even threaten the safe and stable operation of power system.It is considered that the robust optimization method does not need to assume the distribution function of random variables, and the stability of the optimization results is good.Therefore, based on robust optimization theory, the peak-shaving problem of power system after large-scale wind power access is studied in this paper.The large scale access of wind power will lead to a large increase in the demand for peak-shaving of the system, and the pumped storage unit has good peak-shaving characteristics. Therefore, a peak-shaving model of power system considering pumped storage is established.The original-dual interior point method is used to solve the model.Based on the AMPL simulation platform, an example of the improved IEEE-14 node system is presented. The results show that the peak and valley difference rate of equivalent load of the system will be reduced after the pumped storage unit participates in the force distribution, and the number of units in the peak load period will be reduced.The running cost of the system is reduced.Considering the stochastic characteristics of wind power generation, the deviation between the estimated value and the actual value of wind power is defined as wind power disturbance power.Based on the robust optimization theory, the disturbance range of wind power is described by cassette uncertainty sets, and the line safety constraints considering uncertain wind power are constructed, and a box-type robust peak shaving model for power system considering uncertain wind power is proposed.The duality principle is used to simplify the model and transform it into a computable deterministic nonlinear programming problem.Finally, an example of the improved IEEE-14 node system is given. The results show that when the disturbance range of the wind power increases to a certain extent, in order to ensure the safe operation of the line, the unit needs to redistribute the force, resulting in the increase of the operating cost of the system.Considering the randomness of load further, based on the robust optimization theory, the disturbance range of load and wind power is described by cassette uncertainty set, and the line safety constraints considering uncertain load and wind power are constructed.Furthermore, a robust peak shaving model for power system with uncertain load and wind power is proposed.Through the simulation calculation, the output conditions and system operating cost of different wind power and load disturbance range are obtained, which provides an important reference for the peak-shaving problem of power system after wind power is connected to grid.
【學位授予單位】：長沙理工大學
【學位級別】：碩士
【學位授予年份】：2014
【分類號】：TM614

【參考文獻】

相關碩士學位論文 前1條

1 艾則孜江·加帕爾;電網(wǎng)接納間歇性能源能力研究[D];北京交通大學;2012年

，

本文編號：1768490