面向大型同步发电机组的起励系统设计  

Design of Field Flashing System for Large Synchronous Generators

作　　者：霍乾涛[1,2] 刘国华[1,2] 王海军[1,2] 马腾宇[1,2] 徐春建[1,2] 

机构地区：[1]南瑞集团公司(国网电力科学研究院),江苏省南京市211106 [2]国电南瑞科技股份有限公司,江苏省南京市211106

出　　处：《电力系统自动化》2016年第15期148-153,共6页Automation of Electric Power Systems

摘　　要：大型同步发电机已广泛采用自并励励磁系统。文中在对大型同步发电机起励深入研究的基础上,根据起励的特点并结合工程实践,提出了一种基于起励—转子回路时间常数的起励系统主回路设计新方法,包括起励电源的选择、起励—转子回路时间常数的选取计算及关键器件设计方法等。同时,提出了一组适用于大型同步发电机起励的控制新策略,包括整流装置与起励的协调控制、起励回路退出控制策略、基于积分分离法的升压过程控制策略等。仿真结果与1 000MW汽轮机组、700 MW水轮机组的工程实践充分验证了所提出的起励设计方法与控制策略的正确性和有效性。Self-shunt excitation systems are widely used in large synchronous generators.Based on an in-depth study of field flashing of large synchronous generators,and according to the characteristics and requirements of field flashing,this paper proposes a new method of designing the main circuit of the field flashing system based on the time constant of field flashing and rotor winding,including the scheme of power supply selection and rectification,the selection and calculation method of the time constant of field flashing and rotor winding,and the key device design method.A series of new control strategies for the large synchronous generators are presented,including the coordinated control strategy between the field flashing system and the rectifier,the safety exit strategy,and the step-up process control strategy based on the integral separation method.The effectiveness of the proposed design method and control strategy is fully verified by simulation results and project practice of1 000 MW turbo-generators and 700 MW hydro-generators.

关 键 词：大型同步发电机 自并励励磁系统 起励 积分分离法 软起励 零起升压 

分 类 号：TM31[电气工程—电机]