| 摘要 |
Devices and methods for accurately realizing the integration functions, in particular for energy metering systems using a Rogowski coil, are disclosed. In this regard, exemplary embodiments of the present invention may be constructed as two stable filters for the current (I) and voltage (U) channel. In the analog realization form, the transfer function of the voltage channel may be constructed as a high-pass filter function with at least one zero at the origin, while the transfer function of the current channel may be constructed as the multiplication of the high-pass filter function of the voltage channel and the ideal analog integration function. In the digital realization form, the transfer function of the filter for the voltage channel may be constructed as a high-pass filter function with zero(s) at the same location(s) as the pole(s) of the digital integration function, while the transfer function of the filter for the current channel is the multiplication of the high-pass filter function of the voltage channel and the digital integration function.
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