Comprehensive state evaluation theory method for new intelligent station relay protection equipment

Abstract

The invention discloses a comprehensive state evaluation theory method for new intelligent station relay protection equipment. The method comprises steps: a protection device is adopted as a monitoring platform for the device itself, the protection device is self detected, first parameters of the protection device and second parameters of a secondary circuit are acquired, and the first parametersand the second parameters are transmitted to a signal processing system, wherein the secondary circuit is used for monitoring the circuit where the device and the protection device are connected; andbased on the first parameters and the second parameters, state evaluation is carried out: an evaluation component and a scoring principle for the whole device are set, and the equipment in the relay protection device or an interval operation condition can be evaluated. When the method of the invention is applied, an intelligent closed loop management process of intelligent acquisition, risk earlywarning, state evaluation, maintenance strategy and measure management for state maintenance of the substation relay protection equipment can be realized, and the purposes of safe and reliable equipment operation and economic and reasonable maintenance can be achieved.

Description

technical field [0001] The present invention relates to the field of electric power systems, in particular to a comprehensive state evaluation theory method for new intelligent station relay protection equipment Background technique [0002] With the rapid development of the national economy, the scale, technical level and complexity of the modern power grid have been greatly improved, and higher requirements have been put forward for the power supply reliability of the power grid and the maintenance level of relay protection equipment: At the same time, as the first line of defense of the power grid, the relay protection equipment should be able to reliably remove faults and ensure the safe and stable operation of the power grid; secondly, the maintenance work of the relay protection equipment should not affect the normal operation of the power grid system and the reliability of power supply; Third, it is necessary to ensure the high-quality level of maintenance of relay pr...

AI Technical Summary

Problems solved by technology

As a result, the offline condition-based maintenance system generally does not consider the relatively complex general modeling design when designing, but directly performs system modeling based on the condition-based maintenance guidelines of the power grid company, and only partially supports the configuration and maintenance of some condition evaluation calculation formulas , where the state quantity data is directly stored in the form of a database table, and the evaluation algorithm and maintenance strategy algorithm are directly solidified in the program

The disadvantages of this architecture are: the definition of the state quantity of the system is fixed in the program, does not support dynamic modeling, and lacks organic connection with the power grid equipment model; the algorithm is rigid and cannot configure different algorithms for different equipment, and the algorithm relies heavily on maintenance guidance Otherwise, it is difficult for equipment suppliers to participate in the algorithm design, which will lead to frequent changes in maintenance guidelines and maintenance systems; the evaluation results are simplified, and only a single state evaluation score is used to represent the state evaluation results. Too simple evaluation results cannot support a Effective maintenance decision-making algorithm; there is no effective abstraction of condition-based maintenance and auxiliary decision-making process, which is not conducive to guiding the design and development of the system

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