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Harmonic distortion and oscillatory voltages and the role of negative impedance

机译：谐波失真和振荡电压以及负阻抗的作用

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摘要

This paper focuses on two power quality effects that are noticed with power electronic appliances. One effect is a harmonic oscillation by inverters of photo voltaic systems because they bring a high parallel capacitance to the grid and negative output impedance. The other effect is a sub-harmonic oscillation due to the negative differential impedance of constant power loads. This paper discusses both effects and proposes counter measures to mitigate these effects. For harmonic oscillations due to photo voltaic inverters, an extra feature for these inverters is discussed. For the sub-harmonic oscillatory voltages due to appliances with negative differential impedances, a solution can be found in the voltage control systems of the power generators connected to the network.
机译：本文重点介绍了电力电子设备注意到的两个功率质量效果。一种效果是光伏系统的逆变器谐波振荡，因为它们对电网和负输出阻抗带来了高平行电容。由于恒定功率负载的负差分阻抗，其他效果是副谐波振荡。本文讨论了效果，并提出了对措施减轻了这些效果。对于由于光伏逆变器引起的谐波振荡，讨论了这些逆变器的额外特征。对于由于具有负差分阻抗的器具引起的子谐波振荡电压，可以在连接到网络的发电机的电压控制系统中找到解决方案。

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