Phase identification system and method

1. A phase identification system comprising:

a sensor coupled to a terminal of a distribution transformer and configured to sense electrical parameters;

a processor coupled to the sensor for processing the electrical parameters at the terminal, wherein the sensor and the processor are embedded within a bushing unit on the distribution transformer;

wherein the processor is further configured to identify and display phase information at the distribution transformer by analyzing a noise pattern extracted by a filter from the electrical parameters.

2. The phase identification system of claim 1 further comprising an antenna coupled to the processor for transmitting the phase information to a data center.

3. The phase identification system of claim 1 , wherein the processor is further configured to compare a second noise pattern from a sub-station transformer or a location where phase is known with the noise pattern of the distribution transformer.

4. The phase identification system of claim 1 , wherein the sensor is configured to detect a geometric harmonic modulated signal.

5. The phase identification system of claim 1 , wherein the processor is configured to detect a harmonic amplitude from a plurality of harmonics detected by the sensor.

6. The phase identification system of claim 1 , wherein the processor is further coupled to a data center for processing and comparing the electrical parameters.

7. The phase identification system of claim 1 further comprising a power harvester for supplying power to the sensor, the processor, and the display.

8. A method to identify phase information at a distribution transformer terminal comprising:

filtering a noise pattern of an electrical distribution parameter in a sensor coupled to a terminal of a distribution transformer,

identifying phase information of the terminal by analyzing the filtered noise pattern; and

displaying the phase information of the terminal at the distribution transformer terminal.

9. The method of claim 8 , wherein the electrical distribution parameter comprises at least one of a voltage waveform or a current waveform.

10. The method of claim 8 further comprising communicating the phase information to a data center.

11. The method of claim 8 further comprising injecting a geometric harmonic modulated signal into a substation or the terminal.

12. The method of claim 11 further comprising demodulating the geometric harmonic modulated signal.

13. The method of claim 11 further comprising detecting voltage amplitudes of a plurality of voltage harmonics of the electrical distribution parameter and an electrical substation parameter of the substation and comparing the detected voltage amplitudes.

14. A system comprising:

a distribution network comprising a substation coupled to a plurality of distribution transformers;

a plurality of sensors coupled to terminals of the distribution transformers, each sensor configured to detect at least one electrical parameter;

a data center for processing the electrical parameters; and

a phase identification unit coupled to the data center and embedded within a terminal of the distribution transformer, the phase identification unit configured to identify a phase information at the terminals of the distribution transformers by analyzing a noise pattern extracted by a filter from the at least one electrical parameter.

15. The system of claim 14 , wherein the sensors are configured to detect a voltage waveform or a current waveform.

16. The system of claim 14 , wherein the phase identification system comprises a digitizer configured to digitize the electrical parameters.

17. The system of claim 14 , wherein the phase identification system comprises a processor to compute relative harmonic amplitudes.