Abstract: 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.
Type:
Grant
Filed:
March 30, 2007
Date of Patent:
June 16, 2009
Assignees:
Beijing Vango Technologies, Inc., Vango (Hangzhou) Technologies Inc.
Abstract: 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.
Type:
Application
Filed:
March 30, 2007
Publication date:
December 6, 2007
Applicants:
Beijing Vango Technologies, Inc., Vango (Hangzhou) Technologies Inc.