Moreover, three-phase four-wire active filters can suppress zero line current, and solve symmetric problem of system effectively.

另外，三相四线制有源电力滤波器能有效地抑制零线电流，并能有效地解决系统的不对称问题。

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So, it is significant to prevent the occurrence of faulted neutral line within the circuit of three phase and four line system.

因此，防止三相四线制配电回路断零事故的发生，具有更广泛的意义。

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So, it is significant to prevent the occurrence of faulted neutral line within the circuit of three phase and four line system.

因此，防止三相四线制配电回路断零事故的发生，具有更广泛的意义。

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