INTELLIGENT ELECTRONIC DEVICE AND METHOD THEREOF

1 . A method of generating an identifier for an electrical parameter measured by an IED, the method comprising:

obtaining attributes of the electrical parameter;

generating an identifier for the electrical parameter according to the attributes.

2 . The method of claim 1 , wherein attributes of the electrical parameter comprising:

a parameter group representing a group of electrical parameters with the similar functions;

parameter type representing specific type of the parameter group;

update rate representing a period between times of current electrical parameters measured by IED and the next electrical parameters measured by IED;

channel type representing the specific channel where the electrical parameter is measured.

3 . The method of claim 2 , where attributes of the electrical parameter further comprise channel identification representing a specific harmonics order for harmonics measurement.

4 . 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;

a DSP (Digital Signal Processor) coupled to the at least one analog-to-digital converter, and configured to perform digital signal processing on the signal from the at least one analog-to-digital converter;

a CPU coupled to the DSP via a hardware path;

wherein the DSP and the CPU are configured to communicate using a transmission protocol including a data header and a data payload based on the hardware path;

wherein the data header includes a field of parameter group, the data payload includes fields of a parameter type, an update rate and a channel type; the parameter group represents a group of electrical parameters with the similar functions; the parameter type represents specific type of the parameter group; the update rate represents a period between times of current electrical parameters measured by IED and the next electrical parameters measured by IED; the channel type represents the specific channel where the electrical parameter is measured.

5 . The IED of claim 4 , wherein the CPU communicates with the DSP on a dedicated hardware bus.

6 . The IED of claim 5 , where the dedicated hardware bus uses serial transmission.

7 . The IED of claim 5 , where the dedicated hardware bus uses a transmission protocol supported by the CPU and the DSP.