ARC HANDLING CONTROL DEVICE, ARC HANDLING CONTROL METHOD AND RECORDING MEDIUM

• US 20180233901A1
• Filed: 11/29/2016
• Published: 08/16/2018
• Est. Priority Date: 02/10/2016
• Status: Active Application

• Current Assignee: Omron Corporation
• Original Assignee: Omron Corporation
• Inventors: ASHIDA, Takeshi, TOMITA, Kohei
• Granted Patent: US 10,291,016 B2
• Time in Patent Office: Days
• CPC Class Codes: H02H 1/0015 Using arc detectors
• CPC Class Codes: H02H 7/20 for electronic equipment for converters H02H7/10; for electric measuring instruments G01R1/36; for dc voltage or current semiconductor regulators G05F1/569; for amplifiers H03F1/52; for electronic switching circuits H03K17/08
• CPC Class Codes: H02S 40/30 Electrical components
• CPC Class Codes: H02S 40/32 comprising DC/AC inverter means associated with the PV module itself, e.g. AC modules
• CPC Class Codes: H02S 50/00 Monitoring or testing of PV systems, e.g. load balancing or fault identification
• CPC Class Codes: H02S 50/10 Testing of PV devices, e.g. of PV modules or single PV cells testing of semiconductor devices during manufacturing H01L22/00
• CPC Class Codes: Y02E 10/50 Photovoltaic [PV] energy

Abstract

The objective of the present invention is to reduce erroneous detection of arcs, and to reduce erroneous responses concomitant with erroneous detection. In a photovoltaic power generation system (100), a main control part (37) controls an arc detecting device (40) in such a way as to suspend arc detection during periods in which arc-like noise is being generated. Examples that can be cited of periods during which arc-like noise is generated include a period from when a PCS (30) starts up to when the supply of power to a power grid (80) begins, and a period during which a current (I) flowing from a power generating device (10) to the PCS (30) is changing suddenly.

Claims

1. An arc handling control device comprising a control part that controls an arc handling device that handles an arc that is generated in a power generation system including a direct current power supply that performs power generation or charging and discharging of power, and a power conversion device that converts power that is supplied from the direct current power supply,

wherein the control part controls the arc handling device so that an operation that is executed according to detection of the arc is not performed in a period in which arc-like noise is generated.

2. The arc handling control device according to claim 1, wherein the period during which the arc-like noise is generated is a period from a time when the power conversion device starts up to a time when the converted power starts to be output to a load.

3. The arc handling control device according to claim 1, further comprising:

a calculation part that calculates an electric change amount which is an index indicating a degree of temporal change in current or voltage supplied from the direct current power supply to the power conversion device,

wherein the period during which the arc-like noise is generated is a period in which the electric change amount calculated by the calculation part is larger than a predetermined threshold value.

4. The arc handling control device according to claim 1, wherein the control part controls the arc handling device so that the operation that is executed according to detection of the arc is not performed when power conversion in the power conversion device is stopped.

5. The arc handling control device according to claim 1, wherein the arc handling device is an arc extinguishment device that extinguishes the arc.

6. The arc handling control device according to claim 1, wherein the arc handling control device is provided in the power conversion device.

7. The arc handling control device according to claim 1, wherein the arc handling control device is provided in the arc handling device, and is capable of communicating with the power conversion device.

10. A recording medium recording a control program for causing a computer to function as the arc handling control device according to claim 1.

11. The arc handling control device according to claim 2, further comprising:

a calculation part that calculates an electric change amount which is an index indicating a degree of temporal change in current or voltage supplied from the direct current power supply to the power conversion device,

wherein the period during which the arc-like noise is generated is a period in which the electric change amount calculated by the calculation part is larger than a predetermined threshold value.

12. The arc handling control device according to claim 2, wherein the control part controls the arc handling device so that the operation that is executed according to detection of the arc is not performed when power conversion in the power conversion device is stopped.

13. The arc handling control device according to claim 3, wherein the control part controls the arc handling device so that the operation that is executed according to detection of the arc is not performed when power conversion in the power conversion device is stopped.

14. The arc handling control device according to claim 2, wherein the arc handling device is an arc extinguishment device that extinguishes the arc.

15. The arc handling control device according to claim 3, wherein the arc handling device is an arc extinguishment device that extinguishes the arc.

16. The arc handling control device according to claim 4, wherein the arc handling device is an arc extinguishment device that extinguishes the arc.

17. The arc handling control device according to claim 2, wherein the arc handling control device is provided in the power conversion device.

18. The arc handling control device according to claim 3, wherein the arc handling control device is provided in the power conversion device.

19. The arc handling control device according to claim 4, wherein the arc handling control device is provided in the power conversion device.

20. The arc handling control device according to claim 2, wherein the arc handling control device is provided in the arc handling device, and is capable of communicating with the power conversion device.

21. The arc handling control device according to claim 3, wherein the arc handling control device is provided in the arc handling device, and is capable of communicating with the power conversion device.

8. An arc handling control method for controlling an arc handling device that handles an arc that is generated in a power generation system including a power conversion device that converts power from a direct current power supply,

the arc handling control method comprising a step of controlling the arc handling device so that an operation that is executed according to detection of the arc is not performed in a period in which arc-like noise is generated.

9. (canceled)