基于动态相量建模的全补偿消弧线圈无源性控制研究

The passivity-based control algorithm for full compensation arc suppression coil based on dynamic phasor models

全补偿消弧线圈可有效解决接地残流的补偿问题,其建模及控制方法是决定其补偿性能的主要因素.基于对双谐波源的单相接地故障系统的研究,从理论上分析了谐波源类型和故障点位置对故障点谐波电压和电流的影响,阐述了对零序电压进行检测的两个原因.提出一种基于动态相量建模的无源性控制新方法,对逆变器进行动态相量建模,通过去除补偿电流动态相量这一变量达到检测零序电压的目的,然后建立系统误差方程,依据Lyapunov稳定性定理得到能量函数,最后选择耗散系数获得控制率.提出的方法既能检测零序电压,同时也保证了响应速度和补偿精度,其可行性得到了仿真及实验结果的验证.

Full compensation arc suppression coil can solve the problem of residual current compensation effectively,and the modeling and control are the main factors which determine its compensation performances.Based on the analysis on the single phase earth fault system for double harmonic sources,the influences of harmonic source types and fault point position on harmonic voltage and current were analyzed theoretically,and two reasons of detecting zero sequence voltage were described.A novel passivity-based control method based on dynamic phasor models was proposed.The objective of detecting zero sequence voltage can be achieved by removaling of the dynamic phasor model of compensation current as a variable after dynamic phasor modeling for the inverters.The energy function was derived from the error equations of system according to the lyapunov stability.Finally,the control law can be obtained by selecting dissipation coefficients.This method mentioned above can detect and analysis zero sequence voltage.The models are accurate enough,and can ensure response speed and compensation precision.The simulation and experimental results verify the availability.