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DC microgrid load fault diagnosis method and device, and storage medium

A fault diagnosis, DC micro-grid technology, applied in the direction of AC network circuits, electrical components, circuit devices, etc., can solve problems such as high maintenance costs, interference system judgment, communication line false alarms, etc., to achieve convenient and flexible application, high diagnostic accuracy , the effect of high reliability

Pending Publication Date: 2021-01-08
深圳市电创科技有限公司
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Problems solved by technology

[0003] The main disadvantages of this method are 1. It requires a large number of node monitoring devices, and supporting communication lines and concentrators, and the initial construction cost is high; Affects the reliability of diagnosis; 3. Communication lines are easily affected by the environment and cause false alarms, which interfere with system judgment

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  • DC microgrid load fault diagnosis method and device, and storage medium
  • DC microgrid load fault diagnosis method and device, and storage medium
  • DC microgrid load fault diagnosis method and device, and storage medium

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Embodiment Construction

[0020] Below in conjunction with specific embodiment and accompanying drawing, the present invention is further elaborated and illustrated:

[0021] Please refer to figure 1 , DC microgrid load fault diagnosis methods include:

[0022] S100: Import the load characteristic model, import the typical power or typical current of the single unit from the load characteristic model, and obtain the reference total power or reference total current according to the number of system circuit loads.

[0023] The load characteristic model is transferred into the system and used as the basis for system failure judgment. Its typical power and typical current are the typical values ​​of typical loads in the system, and the reference total power or reference total current is obtained by adding the power and current of each load in the system loop.

[0024] S200: Obtain the real-time measured total power or measured total current of the system, and obtain the measured power difference between ...

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Abstract

The invention discloses a DC microgrid load fault diagnosis method and device, and a storage medium. The method comprises the steps: calling in a load feature model, calling in the typical power of asingle body from the load feature model, and obtaining reference total power according to the number of system loop loads; acquiring real-time actual measurement total power of the system, and acquiring an actual measurement power difference value between the actual measurement total power and the reference total power; comparing the actual measurement power difference value with a fault thresholdvalue and an error threshold value, wherein the fault threshold value is greater than or equal to the error threshold value; if the actual measurement power difference value is smaller than the errorthreshold value, correcting the reference total power according to the actual measurement power difference value; and if the actual measurement power difference value is greater than the fault threshold value, obtaining a first ratio of the actual measurement power difference value to the typical power, and outputting the first ratio to serve as a system fault number. The DC microgrid load faultdiagnosis method provided by the invention is low in cost and high in reliability, and the system has the characteristics of continuous self-learning and self-reinforcement, and is high in anti-interference capability and high in diagnosis accuracy.

Description

technical field [0001] The invention relates to the technical field of direct current power grids, in particular to a method, equipment and storage medium for diagnosing load faults in direct current microgrids. Background technique [0002] Existing similar technical products use a node monitoring device installed at each load end to monitor the working status of each load in real time. When any abnormality is found, it will be reported to the superior concentrator by communication and then reported to the operation and maintenance personnel or further uploaded to the server for storage and analysis. [0003] The main disadvantages of this method are 1. It requires a large number of node monitoring devices, and supporting communication lines and concentrators, and the initial construction cost is high; Affect the reliability of diagnosis; 3. The communication line is easily affected by the environment to generate false alarms and interfere with system judgment. Contents ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H02J3/00
CPCH02J3/00125H02J2203/20
Inventor 马化盛
Owner 深圳市电创科技有限公司
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