摘要
为了定量研究高压直流(HVDC)换流阀的开通和关断电气应力,建立了饱和电抗器的暂态电路仿真模型。将饱和电抗器模型等效为1台空载变压器,其漏感和励磁电感分别对应于饱和电抗器的空心电感和铁芯电感;为了避免微分运算带来的误差,将饱和电抗器的非线性铁芯电感等效为伏秒数受控的电流源模型,这样不仅可以提高运算精度,而且可以增强求解过程的收敛稳定性;在传统波穿透理论基础上,进一步考虑了硅钢片"由内而外"的径向逐渐饱和过程,给出了饱和电抗器的涡流电阻模型,大大提高了仿真模型的准确度。通过电容器冲击放电试验验证了饱和电抗器电路仿真模型的优越性。
In order to analysis the turnon and turnoff stress of a high voltage direct current （HVDC） converter valve, the transient circuit simulation model of saturable reactors was built. The simulation model of a saturable reactor was re garded as a noload transformer, whose magnetizing inductance and leakage inductance correspond to the magneticcore and aircore inductance of saturable reactors respectively. The nonlinear inductance of magnetic cores used was equiva lent to a current source controlled by its linked voltssec in order to reduce the calculation errors caused by differentials. The eddycurrent resistance is calculated using the improved wave penetration theory. By doing so, the accuracy and convergence properties of simulation model proposed were greatly improved. The capacitor discharging experiments were conducted to verify the parameters of saturable reactors. It can be seen that the simulation waveforms had a good agree ment with those abstained from high voltage （HV） discharging experiments.
出处
《高电压技术》
EI
CAS
CSCD
北大核心
2014年第1期288-293,共6页
High Voltage Engineering
基金
国家高技术研究发展计划(863计划)(2012AA052701)
国家电网公司科技项目~~
关键词
高压直流
换流阀
开通和关断应力
饱和电抗器
铁芯电感
涡流电阻
高压放电试验
HVDC
converter valve
turn-on and turn-off stress
saturable reactors
magnetic inductance
eddy currentresistance
HV discharging experiment
