求翻译：变频电源为电压反馈串联型，采用不控整流，工作时整流可控硅全导通，所以高次谐波分量小，对电网的影响小。是什么意思？

Series variable frequency power supply for the voltage feedback type, the use of non-controlled rectifier, thyristor rectifier working full conduction, so the high harmonics is small, a small impact on the grid.

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The frequency conversion power source for the voltage feedback series, uses does not control the rectification, when the work the rectification silicon-controlled rectifier entire breakover, therefore the higher harmonic component is small, the influence is small to the electrical network.

Variable frequency power supply for voltage feedback series, with no controlled rectifier, work rectifying thyristor breakover, so higher order harmonic components in small, little influence on the power grid.

Series variable frequency power supply for the voltage feedback type, the use of non-controlled rectifier, thyristor rectifier working full conduction, so the high harmonics is small, a small impact on the grid.