Power grid device condition monitoring method

A technology of power grid equipment and state, applied in the direction of circuit breaker testing, measuring electricity, measuring devices, etc., can solve the problems of unstable use of power grid equipment and easy scrapping, and achieve the effects of avoiding unstable power supply, accurate judgment, and accurate statistics

Inactive Publication Date: 2019-07-05
STATE GRID ZHEJIANG HANGZHOU CITY FUYANG DISTRICT POWER SUPPLY CO LTD +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0002] As users have higher and higher requirements for power supply reliability, power companies have also put forward higher requirements for safety, economy, stability, operation and provision of high-quality power supply services. At present, power grids have increased investment in urban and rural power grid construction. The hardware conditions have been improved and improved to improve the equipment level, but due to the limit value of the number of actions of the capacitor circuit breaker and the outlet switch circuit breaker, it is easy to be scrapped after a period of use, resulting in unstable use of power grid equipment

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0029] The invention provides a method for monitoring the state of power grid equipment. The state of the power grid equipment includes the use state of capacitor circuit breakers and the use state of outlet switch circuit breakers. The method for monitoring the state of power grid equipment includes the following steps:

[0030] a. Set the capacitor closing limit A1 and the switch closing limit B1;

[0031] b. Set the capacitor closing warning value A2 and the switch closing warning value B2;

[0032] c. Count the effective closing times A3 of capacitors and the effective closing times B3 of switches;

[0033] d. Judging the use status of the capacitor circuit breaker. When A3≤A2, the capacitor circuit breaker is in a normal state; when A2

[0034] e. Judging the use status of the outlet switch circuit breaker. When B3≤B2, the outlet switch circuit breaker is in the normal state; when B2

Embodiment 2

[0046] The main difference between this embodiment and the first embodiment is that it also includes the monitoring of the load status of the main transformer.

[0047] The grid power supply status also includes the load status of the main transformer, the rated capacity of the main transformer is P2, the main transformer load alert rate C1 and the main transformer load warning rate C2 are set, the active power value P1 of the high voltage side of the main transformer is counted, and the main transformer load rate C3=P1 / When P2, C3≤C1, the main transformer load is in the normal state, when C11, the main transformer load is overloaded. The advantage of this setting is that the staff can check the load of the main transformer of the grid equipment at any time to understand the operation of the grid equipment. If the load of the main transformer is in an early warning state or overloaded state, the staff can perform maintenance in time to improve the grid power supply. stabilit...

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Abstract

The invention provides a power grid device condition monitoring method. The method comprises the steps that a a capacitor closing limit A1 and a switch closing limit B1 are set; b a capacitor closingwarning value A2 and a switch closing warning value B2 are set; c the number of times A3 of effective closing of a capacitor and the number of times B3 of effective closing of a switch are counted; dif A3 is less than or equal to A2, a capacitor circuit breaker is normal; if A2 is less than A3 which is less than or equal to A1, the capacitor circuit breaker is in an early warning state; if A3 isgreater than A1, the capacitor circuit breaker is in an over-limit state; e if B3 is less than or equal to B2, an outlet switch circuit breaker is normal; if B2 is less than B3 which is less than or equal to B1, an outlet switch circuit breaker is in an early warning state; if B3 is greater than B1, the outlet switch circuit breaker is in an over-limit state; and f when the capacitor circuit breaker is in the early warning state or when the outlet switch circuit breaker is in the early warning state, a power grid device is to be repaired, and the staff is reminded to arrange maintenance for the power grid device, and the power supply of a power grid can be more stable and reliable.

Description

technical field [0001] The invention relates to a method for monitoring the state of power grid equipment. Background technique [0002] As users have higher and higher requirements for power supply reliability, electric power companies have also put forward higher requirements for safety, economy, stability, operation and provision of high-quality power supply services. At present, power grids have increased investment in urban and rural power grid construction. The hardware conditions have been improved to improve the equipment level. However, due to the limit of the number of operations of the capacitor circuit breaker and the outlet switch circuit breaker, it is easy to be scrapped after a period of use, resulting in unstable use of the power grid equipment. Contents of the invention [0003] The purpose of the present invention is to provide a method for monitoring the status of grid equipment, which monitors the status of the grid equipment in real time, so that the ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01R31/00G01R31/327
CPCG01R31/00G01R31/327
Inventor 姚毅滨张霞谢棋陆建东顾凌云刘大伟俞建飞张晶朱立泓帅万高盛智敏孔令令晏玲张慧明徐毓安
Owner STATE GRID ZHEJIANG HANGZHOU CITY FUYANG DISTRICT POWER SUPPLY CO LTD
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