Suzhou Electric Appliance Research Institute
期刊號: CN32-1800/TM| ISSN1007-3175

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光伏參與抑制電力系統(tǒng)區(qū)間振蕩的無功控制策略研究

來源:電工電氣發(fā)布時間:2019-04-29 13:29 瀏覽次數(shù):730
光伏參與抑制電力系統(tǒng)區(qū)間振蕩的無功控制策略研究
 
程青青,都洪基
(南京理工大學 自動化學院,江蘇 南京 210094)
 
    摘 要:針對大規(guī)模光伏并網對系統(tǒng)區(qū)間低頻振蕩可能產生的負面影響,研究了基于無功控制的光伏抑制系統(tǒng)區(qū)間振蕩的控制策略。建立光伏并網模型,采用向控制輸入點注入高斯偽隨機信號的方式辨識出系統(tǒng)的降階傳遞函數(shù),根據(jù)留數(shù)指標對反饋信號進行選擇,選擇留數(shù)幅值最大的信號作為阻尼控制器的輸入信號,參考電力系統(tǒng)穩(wěn)定器的超前- 滯后結構,采用留數(shù)法對阻尼控制器的各參數(shù)進行整定。以四機兩區(qū)域系統(tǒng)為算例,搭建相應的光伏并網模型,通過時域仿真表明:所提出的基于無功控制的光伏附加阻尼控制器對于系統(tǒng)區(qū)間振蕩具有較好的抑制效果。
    關鍵詞:光伏并網;區(qū)間低頻振蕩;無功控制;光伏附加阻尼控制;留數(shù)
    中圖分類號:TM615;TM712     文獻標識碼:A     文章編號:1007-3175(2019)04-0007-06
 
Reactive Power Control Strategy Research for Photovoltaic System to Suppress Interval Oscillation in Power System
 
CHENG Qing-qing, DU Hong-ji
(School of Automation, Nanjing University of Science and Technology, Nanjing 210094, China)
 
   Abstract: Aiming at possible negative impact of large-scale grid connected photovoltaic system on the low frequency oscillation of the system, this paper researched the control strategy of interval oscillation based on reactive power control for photovoltaic suppression system interval oscillation. The photovoltaic grid connected model was established, and the reduced order transfer function of the system was identified by injecting Gauss pseudo-random signal into the control input point. According to the residue index, the feedback signal was selected, and the residual signal of the maximum amplitude was chosen as the input signal of the damping controller. Referring to the lead lag structure of the power system stabilizer, the residue method was used to adjust the parameters of the damping controller. With the four machine two area system as an example, the corresponding photovoltaic grid connected model was built. The time domain simulation shows that the proposed photovoltaic additional damping controller based on reactive power control has a better suppression effect on the system interval oscillation.
    Key words: photovoltaic grid-connected; interval low frequency oscillation; reactive power control; photovoltaic additional damping control; residue
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