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UNDERSTANDING AND MANAGING HARMONICS AND SUPRAHARMONICS IN MODERN ELECTRICITY NETWORKS

Network operators all over the word face increasing challenges to integrate more and more modern power electronic equipment, like photovoltaic inverters, electric vehicle chargers, LED lighting or battery storage systems into their grids. Due to energy efficiency policies, most of that equipment utilizes switching frequencies above 2 kHz, which results in growing distortion levels in the frequency range 2-150 kHz (supraharmonics). On the other hand, their impact on harmonics below 2 kHz remains still important. For a holistic view, not only emission, but also the impact on the network impedance characteristics (i.e. resonances) has to be considered.

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