| 有限长均匀链式电力系统中机电扰动传播分析 |
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| 引用本文： | 王德林,王晓茹.有限长均匀链式电力系统中机电扰动传播分析[J].中国电机工程学报,2011,31(28). |
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| 作者姓名： | 王德林 王晓茹 |
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| 作者单位： | 西南交通大学电气工程学院,四川省成都市,610031 |
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| 基金项目： | 国家自然科学基金项目(50937002); 高等学校博士学科点专项科研基金资助项目(200806131023); 中央高校基本科研业务费专项资金项目(SWJTU09CX029,SWJTU09ZT10)~~ |
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| 摘 要： | 为掌握电力系统中机电扰动传播的本质，基于有限长均匀链式离散电力系统，在不考虑发电机的内阻抗时，研究机电扰动在系统中传播的反射特性。通过拉普拉斯（Laplace）变换，推导出冲激函数和阶跃函数形式的扰动作用下发电机的转子角和功率增量随时间变化的解析表达式，给出离散模型中扰动传播的反射公式，与连续体模型中机电波的反射公式相同，说明了电力系统的机电动态可表达为机电扰动传播过程中多次反射的叠加。最后通过一个实例验证了所得结论的正确性。该结论对于认识大规模电力系统的频率在时间和空间上的分布特性、揭示机电动态现象的内在机制具有一定的理论意义。
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| 关 键 词： | 电力系统 机电扰动传播 反射系数 机电动态 贝塞尔函数 拉普拉斯变换 |
Analysis on Electromechanical Disturbance Propagation in a Finite-length Uniform Chain Discrete Power System |
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| WANG Delin,WANG Xiaoru.Analysis on Electromechanical Disturbance Propagation in a Finite-length Uniform Chain Discrete Power System[J].Proceedings of the CSEE,2011,31(28). |
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| Authors: | WANG Delin WANG Xiaoru |
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| Affiliation: | WANG Delin,WANG Xiaoru(School of Electrical Engineering,Southwest Jiaotong University,Chengdu 610031,Sichuan Province,China) |
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| Abstract: | In order to grasp the essence of electro-mechaincal disturbance propagation in a power network,based on a finite length uniform chain discrete power system,the reflection characteristics of electromechanical disturbance propagation were studied after the machine internal impedance was neglected.Utilizing the Laplace transformations,the analytical expressions of the machine rotor's angle increments and power increments at all buses were derived under the impacts of disturbance with the form of the unit-impul... |
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| Keywords: | power system electromechanical disturbance propagation reflection coefficient electromechanical dynamics Bessel functions Laplace transformation |
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