摘要
同步调相机的稳态和暂态无功补偿能力主要取决于其稳态同步电抗和暂态电抗,当调相机发生转子气隙静偏心故障时会导致暂稳态电抗发生变化。针对如何准确考虑大型同步调相机静偏心故障状态下暂稳态电抗参数的变化趋势问题,首先,从调相机的暂稳态电抗参数的定义和电机内部各绕组及磁路结构之间的电磁关系出发,推导出同步调相机静偏心故障对其暂稳态电抗的影响关系。其次,基于同步调相机机械参数搭建出有限元模型,利用超导回路法仿真计算出调相机的暂稳态电抗参数,其有限元计算结果与调相机实际值误差在5%以内。最后,对于不同静偏心故障程度下调相机的暂稳态电抗进行有限元计算,结果表明,随着调相机静偏心故障程度的增大,调相机稳态同步电抗和暂态电抗都呈现增大的趋势,与理论推导结果相符合。
The steady-state and transient reactive power compensation ability of synchronous condenser mainly depends on its steady-state synchronous reactance and transient reactance.When the rotor air gap static eccentricity fault occurs,the transient and steady-state reactance will change.Aiming at the way to accurately consider the change trend of transient and steady-state reactance parameters under the static eccentric fault state of large synchronous condenser,based on the definition of the transient and steady-state reactance parameters of the synchronous condenser and the electromagnetic relationship between the windings and the magnetic circuit structure inside the motor,the influence of the static eccentricity fault of the synchronous condenser on its transient and steady-state reactance was derived.Secondly,the finite element model was built based on the mechanical parameters of the synchronous condenser,and the transient and steady-state reactance parameters of the synchronous condenser were calculated by using the superconducting circuit method.The error between the finite element calculation results and the actual value of the synchronous condenser is within 5%.Finally,the finite element calculation of the transient and steady-state reactance of the down-regulated camera with different degrees of static eccentricity fault was carried out.The results show that with the increase of the degree of static eccentricity fault of the synchronous condenser,the steady-state synchronous reactance and transient reactance of the synchronous condenser show an increasing trend,which is consistent with the theoretical derivation results.
作者
李俊卿
赵鹏
史玮明
陈忠
李颖
张波
王稚洺
何玉灵
LI Junqing;ZHAO Peng;SHI Weiming;CHEN Zhong;LI Ying;ZHANG Bo;WANG Zhiming;HE Yuling(School of Electric and Electronic Engineering,North China Electric Power University,Baoding 071003,China;School of Electric and Electronic Engineering,University of South Carolina,Columbia 071003,USA;School of Journalism and Communication,Hebei University,Baoding 071002,China;Department of Mechanical Engineering,North China Electric Power University,Baoding 071003,China)
出处
《电机与控制学报》
CSCD
北大核心
2024年第12期12-19,共8页
Electric Machines and Control
基金
国家自然科学基金(52177042)。
关键词
调相机
静偏心故障
暂稳态电抗
超导回路
有限元分析
参数识别
synchronous condenser
static eccentricity fault
transient and steady state reactance
superconducting circuit
finite element analysis
parameter identification
