Methods and systems for performance ratio-based scheduling of solar module maintenance

• US 10,079,572 B2
• Filed: 08/19/2014
• Issued: 09/18/2018
• Est. Priority Date: 08/19/2014
• Status: Active Grant

• Current Assignee: Flex, Ltd.
• Original Assignee: Flex, Ltd.
• Inventors: Singh, Amitabh, Boross, Andras, Ng, Cheau-Long, Voss, Stephen J., Golnas, Anastasios
• Primary Examiner(s): Kuan, John
• Application Number:
  US14/463,316
• Publication Number:
  US 20160056760A1
• Time in Patent Office: 1,491 Days
• Field of Search: None
• CPC Class Codes: H02S 50/00 Monitoring or testing of PV systems, e.g. load balancing or fault identification
• CPC Class Codes: Y02E 10/50 Photovoltaic [PV] energy

Abstract

A method for performance ratio-based scheduling of solar system maintenance is implemented by a monitoring computing device. The monitoring computer device includes a processor in communication with a memory. The method includes receiving a plurality of production data associated with a solar system, determining at least one performance ratio based upon at least a portion of the plurality of production data wherein each performance ratio is associated with a range of expected performance values, validating the at least one performance ratio, determining that the at least one performance ratio is outside the range of expected performance values, and adjusting a maintenance schedule associated with the solar system based upon the at least one performance ratio.

Claims

1. A method for performance ratio-based scheduling of solar module maintenance, the method comprising:

delivering power to at least one load from an array of photovoltaic (PV) modules;

measuring, by a meter, the power delivered to the at least one load;

collecting, via one or more sensors, a plurality of production data associated with the array of PV modules using a gateway device;

transmitting, from the gateway device, the plurality of production data associated with the array of PV modules to a monitoring computing device, wherein the array of PV modules are located at a first location and the monitoring computing device is located at a second location physically separated from the first location;

storing the plurality of production data as historical production data;

determining at least one performance ratio based upon at least a portion of the plurality of production data, wherein each performance ratio is associated with a range of expected performance values;

validating the at least one performance ratio;

determining that the at least one performance ratio is outside the range of expected performance values, wherein determining that the at least one performance ratio is outside the range of expected performance values includes;

retrieving the historical production data;

determining at least one estimated performance ratio by extrapolating from the historical production data; and

comparing the at least one estimated performance ratio to the at least one performance ratio; and

adjusting a schedule to perform a next maintenance activity associated with the array of PV modules based upon the at least one performance ratio and performing the next maintenance activity according to the adjusted schedule.

2. The method of claim 1, further comprising:

generating a linear regression based on the historical production data; and

applying at least one present value to determine the at least one estimated performance ratio.

3. The method of claim 1, further comprising:

determining the range of expected performance values by calculating an acceptable variance of the at least one performance ratio based upon the historical production data.

4. The method of claim 1, further comprising:

determining that the at least one performance ratio indicates a device failure;

identifying a device associated with the device failure; and

transmitting a signal associated with the device failure.

5. The method of claim 1, further comprising:

determining that the at least one performance ratio does not indicate a device failure;

determining a probable explanation associated with the at least one performance ratio; and

transmitting a maintenance request.