Method for fault discrimination, checking and fault influence range analysis of power grid

A power grid fault and influence range technology, applied in the direction of measuring electricity, measuring electrical variables, data processing applications, etc., can solve the problems of sacrificing accuracy and reliability, so as to improve accuracy and reliability, avoid misjudgment, avoid The effect of missed judgment

Inactive Publication Date: 2018-02-02
SHANGHAI MUNICIPAL ELECTRIC POWER CO +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The timeliness is satisfied in this way, but the accuracy and reliability are sacrificed. It is difficult to take into account the use of other criteria that are helpful for fault research and judgment, as well as the time delay and false signal facto...

Method used

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  • Method for fault discrimination, checking and fault influence range analysis of power grid
  • Method for fault discrimination, checking and fault influence range analysis of power grid
  • Method for fault discrimination, checking and fault influence range analysis of power grid

Examples

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Embodiment 1

[0033] This application proposes a fault judgment method that includes big data mining to obtain useful information, fault judgment logic design, fault information formation, fault impact range analysis and display, main network / distribution network data fusion, etc. The specific implementation steps are as follows.

[0034] like figure 1 , figure 2 As shown, a method for grid fault judgment, verification and fault impact range analysis includes the following steps:

[0035] S1. Establish a judgment information data model collected from different fault data sources;

[0036] S2. Obtain updated primary grid topology, wiring diagrams and equipment ledgers of different voltage levels, and establish a one-to-one mapping relationship for all grid equipment and their identifications through a fuzzy matching algorithm;

[0037] S3. Obtain the original event information from different fault data sources, and perform different preliminary screening on it according to different data ...

Embodiment 2

[0048] image 3 Shown is the fault judgment process for the remote signal displacement event in the switch displacement, as follows:

[0049] 1. Determine whether the circuit breaker type is one of line, main transformer, bus coupler / section / bypass, if so, proceed to the next step of judgment, otherwise judge it as a non-fault event, and end the judgment;

[0050] 2. Judging whether there is a fault trip record within the set time before and after the occurrence of the event, if not, proceed to the next step of judgment, otherwise it is judged as a non-fault event, and the judgment ends;

[0051] 3. Judging whether there is a protection action or an accident general action within the set time before and after the event, if so, proceed to the next step of judgment, otherwise it is judged as a non-fault event, and the judgment is ended;

[0052] 4. Judging whether there is a record of the circuit breaker’s displacement within the set time before and after the event, if not, pro...

Embodiment 3

[0058] If there is a protective action within about 5 seconds before and after the opening of the switch, the opening is identified as an accidental opening, which is very likely to be a real fault tripping. The judgment rule of this method for the accidental opening information is The following situations are not considered as real fault tripping events:

[0059] 1. A successful reclosing signal appears after the accident opening occurs;

[0060] 2. After the accident opening occurs, the switching current does not drop to zero;

[0061] 3. The switch current is always zero during the period of accident opening;

[0062] 4. When the accident opening occurs, the switch circuit is in the maintenance state;

[0063] 5. Frequent opening and closing actions occur in a short period of time before and after the accident opening.

[0064] If the above conditions are not met, if there is a remote control operation on the accident trip during the time period when it occurs, no clear ...

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Abstract

The invention relates to a method for the fault discrimination, checking and fault influence range analysis of a power grid, and the method comprises the following steps: 1, building a discriminationinformation data model; 2, building a one-to-one mapping relation between operation sides and production management sides for all power grid equipment, so as to achieve the mutual recognition; 3, obtaining original event information from different fault data sources, carrying out the different initial screening of the original event information according to the difference of the data sources, carrying out the discrimination of the original event information meeting a condition through the correlation event information in a set time period before and after an original event according to a corresponding fault discrimination rule, and classifying the original event information meeting the condition into a suspected fault event set; 4, carrying out the manual checking of the suspected fault event set, determining a fault discrimination result, analyzing the fault influence range through a primary wiring topology of the power grid if the event is determined to be a fault, and representing an analysis result. Compared with the prior art, the method employs multiple pieces of data information and multiple criteria for joint discrimination, and improves the fault discrimination accuracy and reliability.

Description

technical field [0001] The invention relates to the field of grid fault analysis of power systems, in particular to a method for grid fault judgment, check and fault impact range analysis. Background technique [0002] The tripping accident of the power grid has always been the core link of the power grid security. It is the focus of attention of various business departments of the power grid dispatching, operation inspection, and production management. The trip means large-scale power outage accidents, especially for power users with high power supply requirements, even a short power outage will cause serious consequences, such as hospitals in operation, high-speed rail signal systems in operation, aviation command, etc. [0003] Another serious consequence of power grid accident tripping that cannot be detected and dealt with in time is that a single fault may cause cascading failures, and even cause grid disconnection, which seriously threatens the safe operation of the p...

Claims

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Application Information

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IPC IPC(8): G06Q10/06G06Q50/06G01R31/00G01R31/02
CPCG01R31/00G01R31/50G06Q10/06313G06Q10/0635G06Q10/0637G06Q50/06Y04S10/50
Inventor 谢海宁沈冰潘爱强
Owner SHANGHAI MUNICIPAL ELECTRIC POWER CO
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