与长线相联的发电机自励磁仿真与实验  

Simulation of self -excitation of generators connected to long transmission lines

作　　者：崔文进[1] 陆超[1] 夏祖华[1] 王仲鸿[1] 华普校 郭顺宁 

机构地区：[1]清华大学电机工程与应用电子技术系,北京100084 [2]青海电力设计院,西宁810000

出　　处：《清华大学学报（自然科学版）》2002年第9期1154-1157,共4页Journal of Tsinghua University(Science and Technology)

摘　　要：为了解决青海省长距离输电线路对地电容造成的末端小水电自励磁问题 ,利用 PSCAD/EMTDC软件进行了仿真 ,并进行了三机对无穷大系统的动模实验 ,两者结果基本一致。对仿真和动模实验中的各种现象进行了解释 ,总结出一些关于自励磁现象发生条件和表象形式的一般规律 ;并提出了破坏谐振参数、改善励磁、调整运行方式、改变变压器分接头等抑制自励磁的解决措施 ,是对原有自励磁理论的仿真与实验补充。The significant capacitance effects of long transmission lines may cause self excitation in small generators connected to the main electric grid by such long lines in less populated areas such as western China. Numerical simulations of the Qinghai provincial grid using PSCAD/EMTDC code agreed with experimental results of a three -machines analogous system. The various phenomena were analyzed to understand the principle for self -excitation waveforms. And some measures, such as destroying the parameters of the resonance, improving the excitation system, alternation of the adapters of sub -transformers, and so on, were recommended to restraint the self -excitation waveforms via simulations and experiments.

关 键 词：长线相联 自励磁 PSCAD/EMTDC软件 计算机仿真 动模实验 同步发电机 对地电容效应 

分 类 号：TM341.06[电气工程—电机] TP391.9[自动化与计算机技术—计算机应用技术]