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Fault handling method and device for AC/DC hybrid power supply system

A fault handling method, AC and DC hybrid technology, applied to circuit devices, AC network circuits, emergency protection circuit devices, etc., can solve frequent shutdowns and other problems

Active Publication Date: 2021-06-04
GREE ELECTRIC APPLIANCES INC
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] In view of this, the present disclosure provides a fault handling method for an AC / DC hybrid power supply system to solve the problem of frequent shutdowns of the system due to multiple sporadic faults

Method used

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  • Fault handling method and device for AC/DC hybrid power supply system
  • Fault handling method and device for AC/DC hybrid power supply system
  • Fault handling method and device for AC/DC hybrid power supply system

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Embodiment Construction

[0033]Various exemplary embodiments of the present disclosure will now be described in detail with reference to the accompanying drawings. It should be noted that relative arrangements of components and steps, numerical expressions and numerical values ​​set forth in these embodiments do not limit the scope of the present disclosure unless specifically stated otherwise.

[0034] At the same time, it should be understood that, for the convenience of description, the sizes of the various parts shown in the drawings are not drawn according to the actual proportional relationship.

[0035] The following description of at least one exemplary embodiment is merely illustrative in nature and in no way intended as any limitation of the disclosure, its application or uses.

[0036] Techniques, methods and devices known to those of ordinary skill in the relevant art may not be discussed in detail, but where appropriate, such techniques, methods and devices should be considered part of th...

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PUM

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Abstract

The disclosure provides a fault processing method, a fault processing device, and an AC / DC hybrid power supply system. The fault handling method includes: after a fault occurs in the AC / DC hybrid power supply system, judging whether the fault belongs to the first-level fault; In the case of a fault, it is judged whether the fault meets the condition of being transformed into a first-level fault; if so, the shutdown process is performed, otherwise, non-stop fault processing is performed. The condition for turning into a first-level fault includes the first condition or the second condition. The first condition is that the number of occurrences of the secondary fault to which the fault belongs within a first predetermined time is greater than or equal to a first threshold. The second condition is that the number of occurrences of faults within a second predetermined time is greater than or equal to a second threshold. The present disclosure can reduce the problem of frequent downtime of the system caused by multiple sporadic failures, thereby improving user experience.

Description

technical field [0001] The present disclosure relates to the technical field of AC / DC hybrid power supply, in particular to a fault handling method and device for an AC / DC hybrid power supply system. Background technique [0002] Currently, an AC / DC hybrid power supply system can be used to supply power to the load. Taking the photovoltaic power supply system as an example, after the power supply system is powered on, regardless of whether the grid-connected or photovoltaic is running, once any fault occurs on the grid-connected side (that is, the AC side) or the photovoltaic side (that is, the DC side), the system will immediately recover from the non-fault state. Switch to fault state. After entering the fault state, the system will block the corresponding drive pulse or disconnect the corresponding DC contactor and AC contactor, etc., prohibiting operation. At this time, the DC load connected to the DC bus and the open interface will not have a corresponding source to s...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H02J3/00H02J3/38H02J5/00H02H7/26
CPCH02H7/26H02J3/00H02J5/00
Inventor 曲东瑞蒋世用文武陈宁宁
Owner GREE ELECTRIC APPLIANCES INC