高压直流换流阀用饱和电抗器的暂态电路仿真模型

发布时间：2018-02-13 16:35

本文关键词： 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　出处：《高电压技术》2014年01期 　论文类型：期刊论文

【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。
[Abstract]:In order to quantitatively study the switching on and off electrical stress of HVDC converter valve, a transient circuit simulation model of saturated reactor is established. The model of saturated reactor is equivalent to a no-load transformer. The leakage inductance and the excitation inductance correspond to the hollow inductance and the iron core inductance of the saturated reactor respectively. In order to avoid the error caused by the differential calculation, the nonlinear core inductance of the saturated reactor is equivalent to the current source model controlled by the number of volts. In this way, not only the accuracy of calculation can be improved, but also the convergence stability of the solution can be enhanced. On the basis of the traditional theory of wave penetration, the radial gradual saturation process of silicon steel sheet "from inside to out" is further considered. The eddy current resistance model of the saturated reactor is presented, which greatly improves the accuracy of the simulation model, and the superiority of the simulation model of the saturated reactor circuit is verified by the capacitor impulse discharge test.
【作者单位】：国网智能电网研究院;
【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~~
【分类号】：TM474

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