本文選題：光伏發(fā)電　切入點：持續(xù)時間特性　出處：《電力系統(tǒng)自動化》2017年06期

【摘要】：隨著光伏發(fā)電滲透率在電力系統(tǒng)中的快速增加,電網(wǎng)的規(guī)劃和調(diào)度過程中均有必要對其進行精細化的考慮。但光伏發(fā)電功率具有較強的隨機性,對其穩(wěn)態(tài)功率特性的描述需要采用概率統(tǒng)計手段。首先根據(jù)光伏出力運行點及其波動限值定義了光伏出力狀態(tài),然后針對光伏出力維持在某一狀態(tài)不變的時間長度進行了定量研究,提出了光伏發(fā)電功率持續(xù)時間分布的概念�；诘聡椭袊鴮崪y數(shù)據(jù)的分析表明:光伏出力的持續(xù)時間分布存在明顯的雙峰值特征,適合采用逆高斯分布和廣義極值分布函數(shù)進行加權(quán)混合擬合;雙峰值特征表明,光伏發(fā)電可能在局部云層擾動下出現(xiàn)快速功率波動,從而只能在數(shù)分鐘內(nèi)保持出力狀態(tài)不變,也可能在天氣條件良好時跟隨日地運動緩慢變化,其出力可維持某一狀態(tài)長達數(shù)小時。所述研究可用于光伏發(fā)電功率調(diào)度控制過程中測量和決策周期的選定、光伏電站輸出波動限值檢驗等,進而為輸電系統(tǒng)中設備的設計選型提供重要的參考依據(jù)。
[Abstract]:With the rapid increase of photovoltaic (PV) generation permeability in power system, it is necessary to consider it carefully in the planning and dispatching process of power network.However, photovoltaic power generation has a strong randomness, the description of its steady-state power characteristics needs the use of probability and statistics.Firstly, the state of photovoltaic output is defined according to the operating point of photovoltaic force and its fluctuation limit. Then, the concept of power duration distribution of photovoltaic power generation is put forward, which is based on the quantitative study of the time length of photovoltaic output force being maintained in a certain state.The analysis based on the measured data in Germany and China shows that the duration distribution of photovoltaic force has obvious double peak characteristics, which is suitable for weighted mixed fitting using inverse Gao Si distribution and generalized extreme distribution function.Photovoltaic power can fluctuate rapidly under local cloud disturbances, so that it can only remain the same for a few minutes, or it may follow the slow motion of the sun and earth when the weather conditions are good.Its output can maintain a certain state for several hours.The research can be used to determine the measurement and decision period in the process of PV power dispatching and control, to check the limit of output fluctuation of photovoltaic power plant, and to provide an important reference basis for the design and selection of equipment in transmission system.
【作者單位】： 強電磁工程與新技術(shù)國家重點實驗室(華中科技大學);ABB(中國)有限公司ABB中國研究院;
【基金】：國家自然科學基金資助項目(51577075) 國家重點研發(fā)計劃資助項目(2016YFB0900400,2016YFB0900403) 中國博士后科學基金資助項目(2016M590694)~~
【分類號】：TM615

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