幾種提高牛頓法潮流收斂性的初值給定方法研究
李智歡1，朱喬木2，蘇寅生1，韓云飛2，黃河1，陳金富2
1 中國南方電網有限責任公司，廣東 廣州 510623；
2 華中科技大學 強電磁工程與新技術國家重點實驗室，湖北 武漢 430074
摘 要：針對牛頓法潮流計算的初值敏感問題，考慮了兩種含小阻抗支路的病態系統和重負荷病態系統對潮流收斂性的影響，結合IEEE9、IEEE39和某市電網等多個算例，對比分析了平直啟動、直流潮流法、PQ分解法、高斯-塞德爾法等多種初值給定的方法。算例計算結果表明，選擇合適的方法給定迭代初值，可較好解決用牛頓法進行潮流計算時因為初值選取不當導致的潮流收斂過慢或者無法收斂的問題。
關鍵詞：牛頓法潮流計算；初值敏感；潮流收斂；初值
中圖分類號：TM711；TM744 文獻標識碼：A 文章編號：1007-3175(2015)10-0001-05
Research on Several Initial Value Methods of Improved Newton-Raphson Power Flow Convergence
LI Zhi-huan1, ZHU Qiao-mu2, SU Yin-sheng1, HAN Yun-fei2, HUANG He1, CHEN Jin-fu2
China Southern Power Grid Co., Ltd, Guangzhou 510623, China; 2 State Key Laboratory of Advanced Electromagnetic Engineering and Technology, Huazhong University of Science and Technology, Wuhan 430074, China
Abstract: In allusion to the initial value sensitivity problem of Newton-Raphson power flow calculation, this paper considered the impacts of the morbidity system containing small impedance subcircuits and the heavy loading morbidity system on the power flow calculation convergence of power systems. Combining with several calculated examples of IEEE9, IEEE39 and certain city power grid, this paper compared and analyzed straightness starting, direct current power flow, PQ decomposition, Gauss-Seidel etc multiple initial value methods. The result of calculation shows that the problems of slow convergence rate and no convergence because of improper initial value selection can be effectively solved by using initial values provided by suitable methods.
Key words: Newton-Raphson power flow calculation; initial value sensitivity; power flow convergence; initial value
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