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A Method for State Evaluation of Power Transmission Equipment

A technology for state evaluation and power transmission equipment, applied in the direction of electric digital data processing, special data processing applications, instruments, etc., can solve problems such as the inability to scientifically grasp the health status and state development trend of power transmission equipment

Active Publication Date: 2016-03-23
EXAMING & EXPERIMENTAL CENT OF ULTRAHIGH VOLTAGE POWER TRANSMISSION COMPANY CHINA SOUTHEN POWER GRID +1
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Problems solved by technology

None of the above can scientifically grasp the overall health status and status development trend of power transmission equipment

Method used

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  • A Method for State Evaluation of Power Transmission Equipment
  • A Method for State Evaluation of Power Transmission Equipment
  • A Method for State Evaluation of Power Transmission Equipment

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Embodiment Construction

[0064] The content of the present invention will be described in further detail below in conjunction with the accompanying drawings and specific embodiments.

[0065] According to the fuzzy evaluation method in this paper, the fuzzy comprehensive evaluation is carried out on the state of a section of 500kV transmission line, and the results of the fuzzy comprehensive evaluation are verified in combination with the actual operation situation. The state evaluation parameter system of this transmission line is shown in Table 1, and its state evaluation set is V={good, general, attention, serious}.

[0066] Table 1 Membership function

[0067]

[0068] Taking the component conductors of power transmission equipment as an example, the records of the online monitoring status quantities and daily inspection status quantities of the transmission line conductors in this section are shown in Table 2 below. Table 2 contains the status quantity ratings and attention values ​​given in ...

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Abstract

The invention discloses a state evaluation method for power transmission equipment. The state evaluation method for the power transmission equipment comprises the following steps that S1, multi-source heterogeneous information is fused, and a state evaluation parameter system of the power transmission equipment is built in a multi-layer architecture mode; S2, state grades of evaluation are determined, a fuzzy evaluation matrix is obtained according to state variable limiting values in design documents and comment guidelines; S3, the objective weight of each state variable is determined with the information entropy method; S4, the subjective weight of each state variable is determined with the analytic hierarchy process, the subjective weights are combined with the objective weights, and the comprehensive weight of each state variable is worked out; S5, according to the fuzzy evaluation matrix obtained in the step S2 and the comprehensive weights obtained in the step S4, a state evaluation matrix of each component and a global state evaluation matrix of the power transmission equipment are worked out. According to the state evaluation method for the power transmission equipment, the subjective weights, the objective weights and the fuzzy evaluation matrix are combined, so that the problem that because fixed weights are adopted, the global state is slightly influenced when individual indexes are severely abnormal is solved.

Description

technical field [0001] The invention relates to a power system operation safety technology, in particular to a state evaluation method for power transmission equipment. Background technique [0002] The safety of power transmission equipment is the basis for the safe, reliable and stable operation of the power grid. Effective and accurate assessment, diagnosis and prediction of equipment status is an important way to improve the reliability of power supply and the intelligent level of power grid operation. [0003] The fuzzy mathematical method is suitable for the state evaluation of power transmission equipment. It uses the theory of membership degree and membership function in fuzzy sets to mathematically abstract the control relationship of multi-state variables in power transmission equipment. The fuzzy method first conducts single-factor evaluation on various fuzzy factors, then performs fuzzy inference according to a predetermined rule set, and interprets the evaluatio...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G06F17/30
Inventor 宋云海陈岳王奇李晋伟常安邓军严英杰
Owner EXAMING & EXPERIMENTAL CENT OF ULTRAHIGH VOLTAGE POWER TRANSMISSION COMPANY CHINA SOUTHEN POWER GRID
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