Intelligent electronic device and method thereof
AssigneeAccuenergy (Canada) Inc.
InventorsShaohang Cui, Ketao Li, Haoliang Deng, Yufan Wang, Liang Wang
Life of this patent
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Abstract
Provided are a method and apparatus to measure line frequency. Specifically, an Intelligent Electronic Device employs a method in which a processor receives a training dataset including an input variable set and a corresponding zero-crossing position output variable, obtains a hypothesis function based on the training dataset, estimates zero-crossing positions using the hypothesis function and computes a fundamental frequency of the signal based on the estimated zero-crossing positions.
Claims8
A method of measuring frequency in an Intelligent Electronic Device, the method comprising:
- providing a training dataset including an input variable set and a corresponding zero-crossing position output variable;
- obtaining a hypothesis function based on the training dataset;
- estimating zero-crossing positions using the hypothesis function;
- computing a fundamental frequency of a power line signal based on the estimated zero-crossing positions.
An intelligent electronic device (IED) comprising:
- at least one sensor configured for sensing at least one electrical parameter of electrical power distributed from an electrical distribution system to a load;
- at least one analog-to-digital converter coupled to the at least one sensor and configured for converting an analog signal output from the at least one sensor to digital data;
- and
- at least one processing module coupled to the at least one analog-to-digital converter, wherein the at least one processing module is configured to:
- receive a training dataset including an input variable set and a corresponding zero-crossing position output variable;
- obtain a hypothesis function based on the training dataset;
- estimate zero-crossing positions using the hypothesis function;
- and
- compute a fundamental frequency of a power line signal based on the estimated zero-crossing positions.
Dependencies are inferred from the claim text.