Novel railway overhead contact system power taking power source purification device
A purification device and catenary technology, which is applied to harmonic reduction devices, AC network voltage adjustment, and AC network to reduce harmonics/ripples, etc., can solve problems such as the design of power quality characteristics of catenary power supplies, and improve power supply quality Effect
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[0011] Such as figure 1 As shown, the new railway catenary power supply purification device of the present invention includes an input filter, an output voltage controller, and an output filter. The input filter is a conventional LC filter, and its main function is to filter out the AC input The main characteristics of high-order harmonics of voltage are good high-frequency suppression effect and high system stability.
[0012] The main function of the output voltage controller is to keep the output voltage waveform as a stable and smooth sine wave under the condition of large-scale fluctuation of the input voltage and severe distortion of the input voltage waveform. In the present invention, the controller adopts a multi-closed-loop controller scheme of inductive current (that is, inverter output current) feedback control plus output voltage effective value feedback control and load current feedforward control, which can control the output voltage waveform, frequency , The a...
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