主动式配电网铁磁谐振消谐方法研究

Ｒesearch on Ferro － resonance Harmonic Elimination Method for Active Distribution Network

摘要:

针对当前中性点不接地中低压配电网中频发的铁磁谐振这一典型故障,首先,研究分析了其谐振现象的产生机理与抑制方法,并在此基础上提出了一种基于非故障相电压幅值实时跟踪、调节PT开口三角形阻尼电阻的主动式谐振消弭方法;进而,基于电力系统全数字实时仿真平台ADPSS/ETSDAC,结合某35 k V变电站实际参数,搭建了铁磁谐振故障的仿真模型进行分析;最后,仿真验证了所提出的谐振消弭方法的可行性与正确性。

Abstract:

The ferro － resonance is a typical fault occurring frequently in the medium and low voltage neutral ungrounded distribution network，its triggering mechanism and inhibition method are analyzed，and a novel active resonance inhibition method based on real － time sound phase voltage magnitude tracking and open － delta resistance regulation is proposed． Furthermore， based on a full digital real － time simulation platform of power system called ADPSS/ETSDAC，according to actual parameters of a 35 kV substation，a simulation model of ferro － resonance in a distribution network is established． Feasibility and validity of the proposed resonance inhibition method are verified by the simulation results．