A SYSTEM AND METHOD FOR MEASURING PHASE ATTRIBUTES OF ELECTRICAL GRID SYSTEM AND EQUIPMENT USING A SMART PROBE

• US 20130066576A1
• Filed: 09/13/2011
• Published: 03/14/2013
• Est. Priority Date: 09/13/2011
• Status: Active Grant

• Current Assignee: Honeywell International Inc.
• Original Assignee: Honeywell International Inc.
• Inventors: CS, Adishesha, Mahasenan, Arun Vijayakumari, Veeragandham, Bhanumurthy
• Granted Patent: US 9,164,135 B2
• Time in Patent Office: Days
• US Class Current: 702/67
• CPC Class Codes: G01R 15/142 Arrangements for simultaneous measurements of several parameters employing techniques covered by groups G01R15/14 - G01R15/26
• CPC Class Codes: G01R 25/08 by counting of standard pulses

Abstract

A system for measuring phase attributes of high voltage electrical lines comprises a single high voltage probe. The probe comprises a sensing element for selectively measuring voltage of a high voltage electrical line. A processing circuit detects zero crossings of the measured voltage, applies a time tag to the zero crossings, and stores samples of the amplitude and time tagged zero crossings. A memory stores samples of the amplitude and time tagged zero crossings for a plurality of high voltage electrical lines. A processor is operatively associated with the memory for determining phase relationships between the plurality of high voltage electrical lines.

Claims

1. A system for measuring phase attributes of high voltage electrical lines comprising:

a single high voltage probe comprising a sensing element for selectively measuring current or voltage of a high voltage electrical line and developing a measured signal, and a processing circuit for detecting zero crossings of the measured signal, applying a time tag to the zero crossings, and storing samples of the measured signal and time tagged zero crossings;

a memory for storing samples of the measured signal and time tagged zero crossings for a plurality of high voltage electrical lines; and

a processor operatively associated with the memory for determining phase relationships between the plurality of high voltage electrical lines.

2. The system for measuring phase attributes of high voltage electrical lines of claim 1 wherein the probe comprises a housing and the processing circuit, the memory and the processor are enclosed in the housing.

3. The system for measuring phase attributes of high voltage electrical lines of claim 2 wherein the probe further comprises a display for displaying the phase relationships.

4. The system for measuring phase attributes of high voltage electrical lines of claim 2 further comprising a remote device wirelessly communicating with the probe and the remote device comprises a display for displaying the phase relationships.

5. The system for measuring phase attributes of high voltage electrical lines of claim 1 comprising a remote device for wirelessly communicating with the single probe and including the memory and the processor.

6. The system for measuring phase attributes of high voltage electrical lines of claim 5 wherein the remote device further comprises a display for displaying the phase relationships.

7. A system for measuring phase attributes of high voltage electrical lines comprising:

a smart probe comprising a housing supporting a sensing element, a probe circuit in the housing and coupled to the sensing element for selectively measuring current or voltage of a high voltage electrical line and developing a measured signal, a reference time clock, a processing circuit for detecting zero crossings of the measured signal and applying a time tag from the time clock to the zero crossings, and a first memory for storing samples of the measured signal and time tagged zero crossings;

a second memory operatively associated with the first memory for storing samples of the measured signal and time tagged zero crossings for a plurality of high voltage electrical lines; and

a processor operatively associated with the second memory for determining phase relationships between the plurality of high voltage electrical lines.

8. The system for measuring phase attributes of high voltage electrical lines of claim 7 wherein the second memory and the processor are enclosed in the housing.

9. The system for measuring phase attributes of high voltage electrical lines of claim 8 wherein the smart probe further comprises a display for displaying the phase relationships.

10. The system for measuring phase attributes of high voltage electrical lines of claim 8 further comprising a remote device wirelessly communicating with the smart probe and the remote device comprises a display for displaying the phase relationships.

11. The system for measuring phase attributes of high voltage electrical lines of claim 7 comprising a remote device for wirelessly communicating with the smart probe and including the second memory and the processor.

12. The system for measuring phase attributes of high voltage electrical lines of claim 11 wherein the remote device further comprises a display for displaying the phase relationships.

13. A method for measuring phase attributes of high voltage electrical lines comprising:

providing a single high voltage probe comprising a sensing element for selectively measuring current or voltage of a high voltage electrical line and developing a measured signal, and a processing circuit for detecting zero crossings of the measured signal, applying a time tag to the zero crossings, and storing samples of the measured signal and time tagged zero crossings;

operating the probe to sequentially store samples of the measured signal and time tagged zero crossings for a plurality of high voltage electrical lines; and

determining phase relationships between the plurality of high voltage electrical lines using the sequentially stored samples.

14. The method for measuring phase attributes of high voltage electrical lines of claim 13 wherein the operating and determining steps are performed in the probe.

15. The method for measuring phase attributes of high voltage electrical lines of claim 14 further comprising displaying the phase relationships at the probe.

16. The method for measuring phase attributes of high voltage electrical lines of claim 14 further comprising the probe wirelessly communicating with a remote device for displaying the phase relationships.

17. The method for measuring phase attributes of high voltage electrical lines of claim 13 comprising the probe wirelessly communicating with a remote device and the remote device performing the operating and determining steps.

18. The method for measuring phase attributes of high voltage electrical lines of claim 17 further comprising displaying the phase relationships at the remote device.