Fault diagnosis method for power distribution network including high density roof photovoltaic based on Petri network

A distribution network fault and diagnosis method technology, which is applied to the fault location, fault detection according to the conductor type, and electrical measurement, can solve the problems of difficult to ensure positioning accuracy and poor fault tolerance, so as to improve the fault diagnosis speed and improve the diagnosis efficiency. Accuracy, the effect of improving diagnostic tolerance and accuracy

Inactive Publication Date: 2018-11-30
国网江苏省电力有限公司淮安供电分公司 +2
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Problems solved by technology

When the uploaded information of the feeder terminal is missing, the matrix algorithm has disadvantages such as poor fault tolerance, and it is difficult to ensure the accuracy of positioning

Method used

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  • Fault diagnosis method for power distribution network including high density roof photovoltaic based on Petri network
  • Fault diagnosis method for power distribution network including high density roof photovoltaic based on Petri network
  • Fault diagnosis method for power distribution network including high density roof photovoltaic based on Petri network

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specific Embodiment 1

[0059] Specific embodiment 1: with figure 2 The section in the simple distribution network shown Failure occurs as an example when the segment When a fault occurs, the switch node , , The terminal uploads forward fault current information, so image 3 Places in the Petri net fault location model shown , , Contains tokens. And the warehouse , , Separation and change , , connected by an inhibitory arc, that is, the transition , , The trigger conditions cannot be met, and tokens cannot be transferred to the corresponding warehouse , , In order to ensure the accuracy of fault diagnosis.

[0060] For changes , , , , , set the ignition condition of its transition as:

[0061] All the input places of this transition are "ANDed", that is, when all the input places of the transition contain Token (when the transition and the input places are connected through the suppression arc, the identifier in the input place must be empty) , the...

specific Embodiment 2

[0064] Specific embodiment 2: with figure 2 The section in the simple distribution network shown Failure occurs as an example when the segment When a fault occurs, the switch node , , The terminal uploads forward fault current information, so image 3 Places in the Petri net fault location model shown , , Contains Token, Place Contains no tokens. According to the set transition, all input places are "ANDed" to trigger the rule, and the place and change connected and Does not contain tokens, so changes The trigger condition is not met. Combining the above inhibition arc principle, the transition , , , None can be triggered, change Satisfy the trigger condition, Token is finally transferred to the warehouse in the section A fault has occurred and the diagnosis is correct.

[0065] 5) Assign an initial identification to the corresponding place in the positioning model, as shown in the section of the simple power distribution network fai...

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Abstract

The invention provides a fault diagnosis method for power distribution network of high density roof photovoltaic based on Petri network, belongs to the technical field of fault diagnosis for power distribution network, and particular relates to the fault diagnosis method for the power distribution network including high density roof photovoltaic. The fault diagnosis method comprises the followingsteps that switch node information uploaded by terminal equipment is obtained; positive direction of the network is stipulated, switch nodes are numbered, and the information is configured; fault section location rules are determined; fault location models of the Petri network are set up according to a structure of the power distribution network; corresponding libraries in the location models aregiven initial identification; state equation of the Petri network is calculated; whether ignition is completed or not is adjusted, if completed, an ultimate location result is given according to the identification in a section library, the location is finished; and if the ignition is not completed, return and continuous calculation are carried out. According to the fault diagnosis method for the power distribution network including the high density roof photovoltaic based on the Petri network, a power distribution network system including the high density roof photovoltaic can be located in fault section quickly and precisely, and fault diagnosis efficiency and fault tolerance are effectively improved.

Description

technical field [0001] The invention discloses a Petri net-based fault diagnosis method for a distribution network containing high-density rooftop photovoltaics, which belongs to the technical field of fault diagnosis of distribution networks, and in particular relates to a fault diagnosis method for a distribution network containing high-density rooftop photovoltaics. Background technique [0002] In recent years, distributed photovoltaic power sources, which have the advantages of being clean, non-polluting, renewable, and without transportation, have gradually become a supplement and effective support for traditional centralized power generation models. Rooftop photovoltaic power generation systems have become one of the development trends of future power systems. After the distributed photovoltaic power source is connected to the distribution network, the traditional simple single-source radial network becomes a complex multi-source network, thus changing the direction an...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01R31/08
CPCG01R31/086G01R31/088Y04S10/52
Inventor 李峰孙波王轩雷文宝
Owner 国网江苏省电力有限公司淮安供电分公司
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