同步发电机转子电磁暂态的准确表达  

Exact Representation to Rotor Electromagnetic Transient of Synchronous Generator

作　　者：李生虎[1] LI Shenghu(School of Electrical Engineering and Automation,Hefei University of Technology,Hefei 230009,China)

机构地区：[1]合肥工业大学电气与自动化工程学院,合肥230009

出　　处：《电气电子教学学报》2022年第2期153-157,共5页Journal of Electrical and Electronic Education

基　　金：国家自然科学基金项目:“风电并网电力系统干扰动稳定性灵敏度分析和控制措施优化”(51877061)。

摘　　要：同步发电机电磁暂态建模是电网稳定分析和控制的基础。现有文献基于初值定理或超导体概念推导暂态/次暂态电抗/电势,人为假设过强,且不能证明表达方式唯一。转子电磁暂态推导过程复杂,且存在多种形式。本文基于定转子回路电压/磁链方程,通过矩阵变换,严格证明暂态/次暂态电感/电势表达形式唯一。提出基于内电势的转子电磁暂态准确表达。发现现有转子电磁暂态近似表达的时间常数存在误差。研究成果有助于对同步电机模型的理解和应用。The representation to the electromagnetic transient of the synchronous generators(SG)is the basis for the stability analysis and control of power system.The existing definitions to transient/subtransient reactances/potentials based on the initial-value theorem and/or superconductor concept have too strong hypothesis,and the uniqueness of the representations is not proved.The deviation to the rotor electromagnetic transient is complex,and has many expressions.Based on the voltage/flux equations of the stator and rotor,this paper uses the matrix transformation to prove the uniqueness of the definitions of the transient/subtransient reactances/potentials.Exact representation of the rotor electromagnetic transient with the inner potentials is newly proposed.It is found that error exists with the time constants of the existing approximate representation.The study is beneficial to the understanding and application of SG's modeling.

关 键 词：同步电机 电磁暂态 精确表达 矩阵变换 

分 类 号：TM61[电气工程—电力系统及自动化] TM712