基于射影定理次同步附加励磁阻尼控制器设计  

Design of Supplementary Excitation Damping Controller for Damping SSR Based on Projective Theorem

作　　者：徐大鹏[1] 刘威[1] 沙志成[1] 陈实[2] 李宽 

机构地区：[1]山东电力工程咨询院有限公司,山东济南250013 [2]四川大学电气信息学院,四川成都610065 [3]国网山东省电力公司电力科学研究院,山东济南250003

出　　处：《山东电力技术》2017年第6期26-30,共5页Shandong Electric Power

摘　　要：在交流输电线路中加入串联补偿,可有效提高电力输送能力,但串联补偿的接入,有可能引起送端火电机组的次同步谐振现象,从而造成机组轴系的损坏。附加励磁阻尼控制器作为抑制次同步谐振的一种经济有效的措施而被广泛使用在实际工程中。本文从系统传递函数的角度出发,基于射影定理设计附加励磁阻尼控制器。首先通过TLS-ESPRIT算法得到发电机轴系固有扭振频率下的系统传递函数,然后基于射影定理设计附加励磁阻尼控制器,最终实现次同步谐振的抑制。以IEEE第一标准模型作为实例仿真模型。仿真结果表明,基于矩阵束算法和射影定理设计的附加励磁阻尼控制器可有效抑制交流串联补偿引起的次同步谐振,且所设计控制器具有阶数低的优点,有利于工程实现。The series capacitive compensation added to AC transmission lines can effectively increase the power transmission capacity.However,series capacitive compensation may cause subsynchronous resonance（SSR） and cause damage to the unit shaft system.Supplementary excitation damping controller,as an economic and effective way,is commonly used in practical engineering for damping SSR.A SEDC base on projective theorem is proposed from the system transfer function point of view.Firstly,the system transfer function of every torsional vibration natural frequencies is identified.Then,the corresponding output feedback damping controller is designed based on the projective theorem and realize block control for each modal.The IEEE first benchmark model is used for simulation,using PSCAD/EMTDC.The simulation result shows that the proposed SEDC based on matrix pencil method and projective theorem can effectively damp subsynchronous resonance while the controller has the advantages of low order which facilitates project implementation.

关 键 词：串联电容补偿 次同步谐振 射影定理 附加励磁阻尼控制器 

分 类 号：TM761[电气工程—电力系统及自动化]