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Under normal operation, variable-frequency power supplies generate electrical harmonics, and as mentioned earlier, these electrical harmonics can cause various harms to the surrounding environment. To prevent these hazards, we can take some protective measures to reduce and guard against the damage caused by electrical harmonics to the surrounding environment. So, what methods can we use to reduce such protection needs? The technicians from Zhonggang Yangsheng will explain to us what measures can be taken to protect against power harmonics in variable frequency drives. To reduce these harmonics, we can employ techniques such as shielding, isolation, grounding, and filtering of the harmonics generated by the variable frequency drives; by isolating these harmonics, we can minimize damage to the equipment. Harmonic components in the system can also be reduced by improving the way the system operates and by installing AC filters, among other measures. Harmonics can also be reduced by increasing the system’s short-circuit capacity, raising the supply voltage level, and increasing the pulsation frequency of the conversion devices, thereby minimizing the interference and damage caused to equipment and power systems. The above are some measures to reduce the electrical harmonics generated by variable-frequency power supplies, which helps to minimize damage to surrounding electrical devices. I hope this is helpful to everyone; if you know of any other more effective methods, feel free to share them.