A method and system for selecting a filter in a direct current transmission system
A technology of DC transmission system and DC filter, which can be applied to DC circuits to reduce harmonics/ripples, AC network circuits, circuit devices, etc., can solve problems such as unintuitive, difficult to calculate accurately, difficult to cover by analytical algorithms, etc., to achieve The method is simple and intuitive to calculate the effect
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[0022] The present invention will be described in detail below in conjunction with the accompanying drawings. However, it should be understood that the accompanying drawings are provided only for better understanding of the present invention, and they should not be construed as limiting the present invention.
[0023] During the opening and closing process of the converter valve, the voltage will change abruptly. These sudden changes contain a large number of high-frequency components, and these high-frequency components will cause voltage oscillation through the broadband circuit of the converter valve body itself. A series of transient electromagnetic disturbances generated during the opening and closing process of the converter valve will propagate along the circuit, and enter sensitive equipment such as control circuit boards through direct or coupled electrical connections, resulting in electromagnetic disturbances. For this reason, adding DC filter and high-frequency fil...
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