Calculation method for availability ratio and optimal repair cycle of relay protection device

A technology of relay protection and calculation method, which is applied in the direction of calculation, electrical digital data processing, special data processing application, etc. It can solve the problems of uncertain reliability, inability to simulate the change of non-random uncertainty of equipment failure rate, etc. To achieve the effect of accurate and effective calculation

Inactive Publication Date: 2010-07-28
NORTH CHINA ELECTRIC POWER UNIV (BAODING) +2
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Problems solved by technology

[0006] Aiming at the problem that the change of equipment failure rate and the non-random uncertainty caused by maintenance cannot be simulated in the calculation process of the availability rate and optimal maintenance period of the existing relay protection equipment, the present invention pr

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  • Calculation method for availability ratio and optimal repair cycle of relay protection device
  • Calculation method for availability ratio and optimal repair cycle of relay protection device
  • Calculation method for availability ratio and optimal repair cycle of relay protection device

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[0024] The preferred embodiments are described in detail below in conjunction with the drawings. It should be emphasized that the following description is only exemplary, and is not intended to limit the scope of the present invention and its application.

[0025] figure 1 It is a flowchart of the calculation method of the availability of relay protection equipment. figure 1 In, based on the theory of credibility and uncertainty, simulating the operating conditions of intact equipment with uncertainty and failure rate over time, the process of calculating the availability of power system relay protection equipment includes:

[0026] Step 1: Establish a mathematical model of the reliability of the integrity of the repaired relay protection equipment and determine the mathematical model parameters.

[0027] The maintenance of relay protection equipment shows that after the maintenance personnel repair the protection equipment, the result is also ambiguous, that is, it is generally not ...

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Abstract

The invention discloses a calculation method for the availability ratio and optimal repair cycle of a relay protection device. The calculation method for the availability ratio comprises the following steps: establishing a mathematical model of the reliability of the completeness of the repaired relay protection device and determining a parameter of the mathematical model; obtaining a reliabilitycalculation formula of the repaired relay protection device according to the distribution function of the service life of the relay protection device; determining a failure distribution function according to the effect of fuzzy uncertainty on the relay protection device; and calculating the availability ratio of the relay protection device according to the fault distribution function. The calculation method for the optimal repair cycle is implemented by calculating the availability ratios A (T) of the relay protection device in different repair cycles T according to the calculation method forthe availability ratio of the relay protection device to find out the maximal availability ratio A (T) of the relay protection device, therefore, the repair cycle corresponding to the maximal availability ratio A (T) is the optimal repair cycle of the relay protection device. The invention can make the calculations of the availability ratio and the optimal repair cycle of the relay protection device more accurate.

Description

technical field [0001] The invention belongs to the technical field of power system protection, and in particular relates to a calculation method for the availability rate and optimal maintenance period of relay protection equipment. Background technique [0002] Relay protection equipment is the guard of the power system, and it is responsible for the first protection of the three lines of defense in the power system. Relay protection equipment can effectively cut off the fault when the power system fails, so as to ensure the safe, stable and economical operation of the power system. At present, digital relay protection equipment is gradually replacing traditional relay protection equipment due to its advantages of flexibility, reliability, and economy, and is widely used in power systems and continues to develop. [0003] Preventive maintenance refers to the maintenance method of relay protection equipment at regular intervals to avoid failure of relay protection equipmen...

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Application Information

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IPC IPC(8): G06F17/50
Inventor 薛安成庄博王宁黄少峰徐刚杨心平
Owner NORTH CHINA ELECTRIC POWER UNIV (BAODING)
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