Power transmission and transformation system risk early warning method

Abstract

The invention discloses a power transmission and transformation system risk early warning method. The method includes the following steps that: S1, a power transmission line risk assessment establishing overall framework is established, a risk assessment model is established according to each component of a power transmission line, the quantization of state quantities is established, and the degrees of membership of the state quantities are solved; and S2, a calculation method and an evaluation standard for the correction of the risk value of the power transmission line by the operating years and operating environment of equipment and the operation status of a power grid are determined, and the aging coefficients of the components, the operating environment time coefficient and geographical position coefficient of the power transmission line are defined. With the power transmission and transformation system risk early warning method of the invention adopted, an interval of the power transmission line, where a fault occurs, can be determined more accurately, fault inspection can be performed in a targeted manner, the inspection range of line fault inspectors can be decreased, line fault inspection time can be decreased, the cause of the fault of the power transmission line can be determined more accurately, and the efficiency of fault analysis can be improved.

Description

technical field [0001] The invention relates to an early warning method, in particular to a risk early warning method for a power transmission and transformation system. Background technique [0002] The continuous expansion of the scale and increasing importance of the power system has made the society have higher requirements for the reliable operation of the power system. Electric workers not only need to solve the existing problems, but also need to understand the possibility of equipment problems and the severity of the problems through risk assessment. Not only that, the data of risk assessment are often used in the operation and maintenance scheduling of the power grid, and can play a guiding role in the operation monitoring, maintenance management, fault handling, and on-site inspection of power companies. At the same time, the environment of overhead transmission lines is complex and changeable, and the operation status is seriously affected by rain, snow, lightnin...

AI Technical Summary

Problems solved by technology

Risk assessment is a complex and time-consuming task in all industries. Since the assessment results are mixed with a large number of subjective factors, the accuracy of the mathematical model for assessment is low and the compatibility is poor.

In the electric power industry, the main problems in the current risk assessment of transmission lines are: 1. The evaluation method is simple, the parameters are fixed, and the convincing results are limited

2. It is difficult to obtain data, the information is incomplete, the assessment is not comprehensive enough, and the assessment results cannot truly reflect the risk situation of the equipment

3. Status assessment and risk assessment are out of touch. Most power grid companies only conduct status assessment, and follow-up maintenance and risk assessment work no longer pay attention

4. Low-accuracy and incomplete risk assessment reports cannot reflect the real risks of equipment, and the assessment results often have limited impact on maintenance decisions, so they cannot strongly support the maintenance decision-making