Multi-information fusion circuit breaker state monitoring method and system thereof

A circuit breaker state and multi-information fusion technology, applied in the field of electric power automation, can solve problems affecting the stability of the station control layer network, differences, and increased costs in the station

Inactive Publication Date: 2017-08-29
NARI TECH CO LTD +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] (1) The online monitoring algorithms of each manufacturer are different, and the actual monitoring effect of the equipment needs to be further improved;
[0006] (2) Configuring multiple online monitoring IED devices not only increases the cost in the station, but also affects the stability of the station control layer network
IED equipment

Method used

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  • Multi-information fusion circuit breaker state monitoring method and system thereof
  • Multi-information fusion circuit breaker state monitoring method and system thereof
  • Multi-information fusion circuit breaker state monitoring method and system thereof

Examples

Experimental program
Comparison scheme
Effect test

Example Embodiment

[0063] Example 1

[0064] reference figure 1 , Multi-information fusion circuit breaker condition monitoring method, including:

[0065] S1, according to the rated breaking current and breaking capacity of the circuit breaker, determine the relationship curve between the allowable breaking times of the circuit breaker contacts and the tripping current;

[0066] S2, based on the relationship curve determined by S1, after each circuit breaker is opened, the loss rate caused by the circuit breaker is calculated separately;

[0067] S3, accumulate the loss rate caused by each opening of the circuit breaker to obtain the current total loss rate;

[0068] S4: Set the alarm value of the current total loss rate, determine whether the current total loss rate reaches the alarm value, and if it reaches the alarm value, generate circuit breaker contact wear alarm data;

[0069] S5: Establish an SCBR logical node in the IEC61850 model to record the current total loss rate of each circuit breaker in t...

Example Embodiment

[0092] Example 2

[0093] according to figure 2 The loss curve shown in is set on the human-computer interaction LCD panel of the protection measurement and control device: P1' (1.2kA, 1000), P2' (8kA, 150), P3' (20kA, 12), CT ratio 1200:1, the initial value of the current total wear rate of the circuit breaker is 0, and the action time of the circuit breaker mechanism is set to 0.2s.

[0094] 1) The device is remotely opened without external protection current. The calculated loss rate is shown in Table 1:

[0095] Table 1 Remotely operated circuit breaker wear monitoring

[0096]

[0097] 2) The protection device casts the overcurrent stage I, the action setting is set to 4A, taking the A phase fault as an example, for P1-P2, P2-P3,> P3 these 3 current ranges select 4 reference points for fault test respectively,> P3 point test times is 1 time, other points test times is 5 times. Error (%) in the table=|actual loss (%)-theoretical loss (%)|. The actual loss (%) is the loss value ...

Example Embodiment

[0106] Example 3

[0107] A multi-information fusion circuit breaker condition monitoring system includes:

[0108] The relationship curve fitting module determines the relationship curve between the allowable opening times of the circuit breaker contacts and the tripping current according to the rated breaking current and breaking capacity of the circuit breaker;

[0109] The circuit breaker breaking loss calculation module, based on the relationship curve determined by S1, calculates the loss rate caused by the circuit breaker each time the circuit breaker is broken;

[0110] The current total loss rate calculation module accumulates the loss rate caused by each break of the circuit breaker to obtain the current total loss rate;

[0111] The total loss rate alarm module sets the alarm value of the current total loss rate, determines whether the current total loss rate reaches the alarm value, and generates the circuit breaker contact wear alarm data if it reaches the alarm value;

[01...

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Abstract

The invention discloses a multi-information fusion circuit breaker state monitoring method and a system thereof. The method is characterized by during application, firstly, according to a rated breaking current and an interrupting capacity of a circuit breaker, determining a relation curve between breaking times allowed by a circuit breaker contact point and a tripping current; then, after the circuit breaker is disconnected every time, based on the relation curve, calculating a loss rate corresponding to disconnection of this time of the circuit breaker; accumulating the loss rates of disconnection of several times and acquiring a current total loss rate; if the current total loss rate reaches an alarm value, generating circuit breaker contact head wearing alarm data; and finally fusing the current total loss rate of the circuit breaker, the circuit breaker contact head wearing alarm data and protection measurement and control data into same IEC61850 model data and sending to a monitoring background. In the invention, on-line monitoring precision of a circuit breaker state can be increased to a certain degree; an access quantity of transformer substation control layer equipment is reduced; and operation cost of a transformer substation is decreased.

Description

technical field [0001] The invention relates to the technical field of electric power automation, in particular to a multi-information fusion circuit breaker state monitoring method and system. Background technique [0002] The normal operation of the circuit breaker affects the stable operation of the substation as a whole. The maintenance cycle of the circuit breaker equipment is generally determined according to the number of breaking times provided by the manufacturer. At present, the status monitoring of primary equipment mainly relies on various sensors. With the in-depth promotion of domestic smart substation technology, the online monitoring and maintenance technology of primary equipment status such as transformers and GIS switches in substations is becoming more and more stable and mature. The establishment of the IEC61850 standard enables the information of the circuit breaker status monitoring intelligent electronic equipment in the substation bay layer to be emb...

Claims

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Application Information

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IPC IPC(8): G01R31/327
CPCG01R31/327
Inventor 沈宇龙沈健周劭亮夏成林吴骞刘辉张琼冯智凯陈力孙健萍
Owner NARI TECH CO LTD
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