CN106779102B - Nuclear power plant maintenance strategy optimization method and device - Google Patents
Nuclear power plant maintenance strategy optimization method and device Download PDFInfo
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Abstract
The invention discloses a method and a device for optimizing maintenance strategies of a nuclear power plant, wherein the method comprises the following steps: s1, acquiring feedback information corresponding to the maintenance strategy of the equipment aiming at the aging fault mode; s2, determining the current state level of the equipment according to the feedback information and the currently determined maintenance strategy; and S3, optimizing the task content or the execution period of the maintenance strategy or keeping the maintenance strategy unchanged according to the state level determined in the step S2 and the historical trend of the equipment failure. According to the method, the state grade of the equipment is determined by collecting the feedback information and the currently determined maintenance strategy, and the task content or the execution period of the maintenance task under the current maintenance strategy is optimized or the maintenance strategy is maintained unchanged by combining the historical trend of the equipment fault, so that the usability and the reliability of each system of the power plant at a higher level are ensured, the service life management of the equipment is optimized, and the safe, reliable and effective operation of the power plant is ensured.
Description
Technical Field
The invention relates to the field of nuclear power, in particular to a maintenance strategy optimization method and device for a nuclear power plant.
Background
The nuclear power plant generally needs to evaluate whether the current maintenance strategy is suitable for the current equipment of the power plant and enables the current equipment to meet the preset function, screens out conditions such as excessive maintenance items and insufficient maintenance, and adjusts the maintenance strategy according to the evaluation result, so that the equipment reliability is improved, the maintenance resources of the nuclear power plant are optimized, the maintenance outline is optimized, the overall performance of the power plant is improved, and the safety, the reliability and the economical efficiency of the power plant are ensured and improved. The effectiveness of the maintenance strategy has important significance for improving the availability and reliability of equipment in the service life of the power plant and is an important basis of the maintenance strategy.
Disclosure of Invention
The technical problem to be solved by the present invention is to provide a method and an apparatus for optimizing a maintenance strategy of a nuclear power plant, aiming at the above requirements of the prior art.
The technical scheme adopted by the invention for solving the technical problems is as follows: a method for optimizing a maintenance strategy of a nuclear power plant is constructed, and the method comprises the following steps:
s1, acquiring feedback information corresponding to the maintenance strategy of the equipment aiming at the aging fault mode;
s2, determining the current state level of the equipment according to the feedback information and the currently determined maintenance strategy;
and S3, optimizing the task content or the execution period of the maintenance strategy or keeping the maintenance strategy unchanged according to the state level determined in the step S2 and the historical trend of the equipment failure.
In the method for optimizing the maintenance strategy of the nuclear power plant, step S2 includes: if the high-risk fault phenomenon of the equipment can be determined according to the feedback information, and the current determined maintenance strategy cannot manage the fault phenomenon, judging that the equipment state is an unacceptable state; if the fault phenomenon of degradation or degeneration of the equipment component can be determined according to the feedback information, and the fault phenomenon can be eliminated after each maintenance task of the currently determined maintenance strategy is executed, the equipment state is judged to be a critical state; and if the equipment fault phenomenon managed by the maintenance strategy cannot occur when a certain maintenance task of the currently determined maintenance strategy is executed in a delayed mode or is not executed according to the feedback information, judging that the equipment state is an acceptable state.
In the method for optimizing the nuclear power plant maintenance strategy according to the present invention, if the status level determined in step S2 is an unacceptable status, step S3 includes:
s31a, judging whether the task content of the maintenance task in the maintenance strategy is unreasonable, if so, executing a step S32a, otherwise, executing a step S33 a;
s32a, optimizing the task content, and ending;
s33a, judging whether the execution cycle of the maintenance task is unreasonable, if so, executing a step S34a, otherwise, executing a step S35 a;
s34a, shortening the execution cycle of the maintenance task and ending;
s35a, maintaining the execution period unchanged, and adjusting the task content; or the step S2 is performed after the maintenance strategy corresponding to the failure mode is determined again.
In the method for optimizing the nuclear power plant maintenance strategy according to the present invention, if the status level determined in step S2 is a critical status, step S3 includes:
s31b, judging whether the feedback information has a fixed trend or the equipment aging component has a predictable service life, if so, executing a step S32b, otherwise, executing a step S33 b;
s32b, according to the service life of the equipment components or the time trend of the equipment component failure mode operation, prolonging the execution period of the maintenance task and ending;
s33b, judging whether the maintenance task needs to manage other fault modes, if so, executing a step S34b, otherwise, entering a step S35 b;
s34b, keeping the execution period unchanged, and ending;
s35b, judging whether the equipment can normally work before the next maintenance task is executed according to the operation experience data of the power plant equipment, if so, executing a step S36b, otherwise, jumping to a step S34 b;
and S36b, delaying the execution cycle of the maintenance task once.
In the method for optimizing the nuclear power plant maintenance strategy according to the present invention, if the status level determined in step S2 is an acceptable status, step S3 includes:
s31c, judging whether the device state of the same type of device is over-degraded or degraded, if so, executing a step S32c, otherwise, executing a step S33 c;
s32c, the maintenance strategy is kept unchanged, and the operation is finished;
s33c, judging whether the maintenance task needs to manage other fault modes, if so, executing a step S34c, otherwise, entering a step S35 c;
s34c, sequentially acquiring feedback information of other failure modes and entering the step S2;
and S35c, prolonging the execution period.
The invention also discloses a maintenance strategy optimization device for the nuclear power plant, which comprises the following steps:
the feedback information acquisition device is used for acquiring feedback information corresponding to a maintenance strategy of the equipment aiming at the aging fault mode;
the state judgment device is used for determining the current state level of the equipment according to the feedback information and the currently determined maintenance strategy;
and the optimization device is used for optimizing the task content or the execution period of the maintenance strategy or maintaining the maintenance strategy unchanged according to the determined state level and the historical trend of the equipment failure.
In the nuclear power plant maintenance strategy optimization apparatus of the present invention, the state judgment means includes:
the first judgment unit is used for judging that the equipment state is in an unacceptable state when the equipment can be determined to have a high-risk fault phenomenon according to the feedback information and the current determined maintenance strategy cannot manage the fault mode corresponding to the fault phenomenon;
the second judgment unit is used for judging that the equipment state is a critical state when the fault phenomenon that the equipment part is degraded or degraded can be determined according to the feedback information and can be eliminated after each maintenance task of the currently determined maintenance strategy is executed;
and the third judging unit is used for judging that the equipment state is in an acceptable state when the equipment running condition can be determined to be good according to the feedback information, and the equipment fault phenomenon managed by the maintenance strategy cannot occur when a certain maintenance task of the currently determined maintenance strategy is executed in a delayed mode or is not executed.
In the nuclear power plant maintenance strategy optimization device, the optimization device comprises a first optimization unit, a second optimization unit and a third optimization unit, wherein the first optimization unit is used for judging whether the task content of a maintenance task in the maintenance strategy is unreasonable when the state level is in an unacceptable state, optimizing the task content if the task content is unreasonable, judging whether the execution period of the maintenance task is unreasonable if the task content is reasonable, and optimizing the execution period of the maintenance task if the execution period is unreasonable; or the state judgment device is triggered again after the maintenance strategy corresponding to the failure mode is determined again.
In the nuclear power plant maintenance strategy optimization device, the optimization device comprises a second optimization unit, wherein the second optimization unit is used for judging whether the feedback information has a fixed trend or the equipment aging component has a predictable life when the state level is a critical state, and if so, the execution period of a maintenance task is prolonged according to the equipment component life or the time trend of equipment component failure mode operation; if not, judging whether the maintenance task needs to manage other fault modes, if so, maintaining the execution period unchanged, if not, judging whether the equipment can normally work before the next maintenance task is executed according to the operation experience data of the power plant equipment, if so, delaying the execution period of the maintenance task once, and if not, maintaining the execution period unchanged.
In the nuclear power plant maintenance strategy optimization device, the optimization device comprises a third optimization unit used for judging whether the equipment state of the similar equipment is over-degraded or degraded when the state level is an acceptable state, if so, the maintenance strategy is kept unchanged, if not, whether other fault modes need to be managed by the maintenance task is judged, if so, the state judgment device is triggered after feedback information of other fault modes is sequentially acquired, and otherwise, the execution period is prolonged.
The method and the device for optimizing the maintenance strategy of the nuclear power plant have the following beneficial effects: according to the method, the state grade of the equipment is determined by collecting the feedback information and the currently determined maintenance strategy, and the task content or the execution period of the maintenance task under the current maintenance strategy is optimized or the maintenance strategy is maintained unchanged by combining the historical trend of the equipment fault, so that the usability and the reliability of each system of the power plant at a higher level are ensured, the service life management of the equipment is optimized, and the safe, reliable and effective operation of the power plant is ensured.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below, it is obvious that the drawings in the following description are only embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to the provided drawings without creative efforts:
FIG. 1 is a flow chart of a preferred embodiment of a nuclear power plant maintenance strategy optimization method of the present invention;
FIG. 2 is a flowchart of a first embodiment of step S3 in FIG. 1;
fig. 3 is a flowchart of a second embodiment of step S3 in fig. 1;
fig. 4 is a flowchart of the third embodiment of step S3 in fig. 1.
Detailed Description
In the embodiment of the invention, the current state grade of the equipment is determined according to the feedback information and the currently determined maintenance strategy by acquiring the feedback information corresponding to the maintenance strategy of the equipment aiming at the aging fault mode; and then according to the determined state level and the historical trend of equipment faults, evaluating whether the current maintenance strategy is suitable for the current equipment of the power plant and enables the current equipment to meet the preset function, screening out conditions such as excessive maintenance items and insufficient maintenance, and adjusting the maintenance strategy according to the evaluation result, such as optimizing task content or execution period of the maintenance strategy or maintaining the maintenance strategy unchanged, so as to ensure that each system of the power plant is in higher-level availability and reliability, optimizing equipment life management, and ensuring safe, reliable and effective operation of the power plant.
In order to better understand the technical solutions, the technical solutions will be described in detail below with reference to the drawings and the specific embodiments of the specification, and it should be understood that the embodiments and specific features of the embodiments of the present invention are detailed descriptions of the technical solutions of the present application, and are not limited to the technical solutions of the present application, and the technical features of the embodiments and examples of the present invention may be combined with each other without conflict.
Referring to fig. 1, a flow chart of a preferred embodiment of the method for optimizing a maintenance strategy of a nuclear power plant of the present invention is shown. In a preferred embodiment, the method comprises:
s1, acquiring feedback information corresponding to the maintenance strategy of the equipment aiming at the aging fault mode;
s2, determining the current state level of the equipment according to the feedback information and the currently determined maintenance strategy;
and S3, optimizing the task content or the execution period of the maintenance strategy or keeping the maintenance strategy unchanged according to the state level determined in the step S2 and the historical trend of the equipment failure.
The respective steps are explained in detail below.
Regarding step S1:
in the step, relevant feedback information in the aspect of equipment operation state is collected, wherein the relevant feedback information comprises various experience feedbacks, daily inspection feedbacks, power plant event report feedbacks, various relevant experience feedbacks in the industry and the like. In the preferred embodiment, the feedback information sources mainly include the following three aspects:
a) working condition information recorded by on-site operation inspection personnel
b) Statistical empirical data;
c) performance monitoring reporting
Regarding step S2:
the equipment state of the invention is divided into: an unacceptable state, a critical state, an acceptable state.
And if the fault phenomenon with high risk can be determined to occur on the equipment according to the feedback information, the fault phenomenon can cause more serious fault influence or unacceptable fault influence and consequence of the power plant to influence the production or safety of the nuclear power plant, and the fault mode corresponding to the fault phenomenon which occurs cannot be managed by the currently determined maintenance strategy, the equipment state is determined to be in an unacceptable state.
A critical state, wherein if the fault phenomenon of degradation or degeneration of the equipment can be determined according to the feedback information, the fault phenomenon can be eliminated after each maintenance task of the currently determined maintenance strategy is executed, and the design function requirement of the power plant on the equipment where the component is located cannot be influenced, the equipment state is determined to be the critical state;
where equipment component degradation or degradation is anticipated in advance, equipment or component performance degradation results from equipment long-term operational service, equipment component aging failures, and existing maintenance strategies for equipment may manage such time-dependent failure modes. The current maintenance task and the execution period corresponding to the equipment in the critical state are reasonable to some extent (for example, the rubber sealing ring of the valve has time-related abrasion, and the sealing ring can be replaced periodically to prevent the valve from leaking outwards or inwards due to the abrasion of the sealing ring).
And the acceptable state indicates that the equipment running state is very good, and if the equipment fault phenomenon managed by the maintenance strategy cannot occur when a certain maintenance task of the currently determined maintenance strategy is executed in a delayed mode or is not executed according to the feedback information, the equipment state is judged to be the acceptable state.
Regarding step S3:
after the device status has been ranked at step S2, different coping strategies are executed according to its status level. Three status levels are described below.
Fig. 2 is a flowchart of a first embodiment of step S3 in fig. 1.
Any unacceptable condition is more risky to the equipment and system than a critical condition and an acceptable condition, and for equipment to develop unacceptable conditions, corrective action and long-term preventative maintenance strategies need to be taken. If an unacceptable state occurs, it needs to be considered that the reason for causing the operation state of the equipment to be unacceptable is that the task content of the maintenance task in the maintenance strategy is unreasonable or the execution period is not reasonable enough, and generally, the unreasonable task content is more risky than the unreasonable execution period.
Specifically, if the state level determined in step S2 is the unacceptable state, the step S3 includes:
s31a, judging whether the task content of the maintenance task in the maintenance strategy is unreasonable, if so, executing a step S32a, otherwise, executing a step S33 a;
s32a, optimizing the task content, and ending;
s33a, judging whether the execution cycle of the maintenance tasks is unreasonable, if so, executing a step S34a, otherwise, indicating that the maintenance tasks corresponding to the equipment failure mode are not aligned when the analysis is started, and executing a step S35 a;
s34a, shortening the execution cycle of the maintenance task and ending;
s35a, entering the step, showing that the unacceptable state of the equipment is not caused by unreasonable task content of the maintenance task and unreasonable execution cycle, so that two possibilities exist at this time, the first possibility is that the maintenance task content is not described definitely, so that the task execution effect comes in and goes out with the schematically described task, the execution cycle is maintained unchanged, and the task content is adjusted; the second possibility is that no maintenance task corresponding to the failure mode is found, and the step S2 is followed after the maintenance strategy corresponding to the failure mode is determined again.
Referring to fig. 3, it is a flowchart of a second embodiment of step S3 in fig. 1; if the state level determined in step S2 is the critical state, the step S3 includes:
s31b, judging whether the feedback information has a fixed trend or the equipment aging component has a predictable service life, if so, executing a step S32b, otherwise, executing a step S33 b;
s32b, according to the service life of the equipment components or the time trend of the equipment component failure mode operation, prolonging the execution period of the maintenance task and ending;
s33b, judging whether the maintenance task needs to manage other fault modes, if so, executing a step S34b, otherwise, entering a step S35 b;
s34b, entering the step, showing that there is not enough data to ensure that the performance of the equipment is not reduced after the maintenance task is once postponed, keeping the execution period unchanged for conservative sake, and ending;
s35b, judging whether the equipment can normally work before the next maintenance task is executed according to the operation experience data of the power plant equipment, if so, executing a step S36b, otherwise, jumping to a step S34 b;
and S36b, delaying the execution cycle of the maintenance task once, and paving the final cycle optimization through the one-time delay of the exploratory task.
Referring to fig. 4, it is a flowchart of the third embodiment of step S3 in fig. 1. If the state level determined in step S2 is the acceptable state, the step S3 includes:
s31c, judging whether the device state of the same type of device is over-degraded or degraded, if so, executing a step S32c, otherwise, executing a step S33 c;
s32c, the maintenance strategy is kept unchanged, and the operation is finished;
s33c, judging whether the maintenance task needs to manage other fault modes, if so, executing a step S34c, otherwise, entering a step S35 c;
s34c, sequentially acquiring feedback information of other failure modes and entering the step S2;
entering the step, it is described that the corresponding maintenance task on the device manages other failure modes at the same time, so that the execution period of the maintenance task cannot be prolonged by only the feedback states of the previously collected failure modes, in this case, the feedback states corresponding to the other failure modes need to be collected, each failure mode is decided according to the above-mentioned flow, and the maintenance task period can be prolonged only when all the failure modes meet the condition of being capable of prolonging the period.
And S35c, prolonging the execution period.
Correspondingly, the invention also discloses a maintenance strategy optimization device of the nuclear power plant corresponding to the method, which specifically comprises the following steps:
the feedback information acquisition device is used for acquiring feedback information corresponding to a maintenance strategy of the equipment aiming at the aging fault mode;
the state judgment device is used for determining the current state level of the equipment according to the feedback information and the currently determined maintenance strategy;
and the optimization device is used for optimizing the task content or the execution period of the maintenance strategy or maintaining the maintenance strategy unchanged according to the determined state level and the historical trend of the equipment failure.
Wherein the state judgment device includes:
the first judgment unit is used for judging that the equipment state is in an unacceptable state when the equipment can be determined to have a high-risk fault phenomenon according to the feedback information and the current determined maintenance strategy cannot manage the fault mode corresponding to the fault phenomenon;
the second judgment unit is used for judging that the equipment state is a critical state when the fault phenomenon that the equipment part is degraded or degraded can be determined according to the feedback information and can be eliminated after each maintenance task of the currently determined maintenance strategy is executed;
and the third judging unit is used for judging that the equipment state is in an acceptable state when the equipment running condition can be determined to be good according to the feedback information, and the equipment fault phenomenon managed by the maintenance strategy cannot occur when a certain maintenance task of the currently determined maintenance strategy is executed in a delayed mode or is not executed.
Specifically, the optimization device includes:
the first optimization unit is used for judging whether the task content of a maintenance task in the maintenance strategy is unreasonable or not when the state level is in an unacceptable state, optimizing the task content if the task content is unreasonable, judging whether the execution period of the maintenance task is unreasonable or not if the task content is reasonable, and optimizing the execution period of the maintenance task if the execution period is unreasonable; or the state judgment device is triggered again after the maintenance strategy corresponding to the failure mode is determined again.
The second optimization unit is used for judging whether the feedback information has a fixed trend or the equipment aging component has a predictable life when the state level is a critical state, and if so, prolonging the execution period of the maintenance task according to the equipment component life or the time trend of the equipment component fault mode operation; if not, judging whether the maintenance task needs to manage other fault modes, if so, maintaining the execution period unchanged, if not, judging whether the equipment can normally work before the next maintenance task is executed according to the operation experience data of the power plant equipment, if so, delaying the execution period of the maintenance task once, and if not, maintaining the execution period unchanged.
And the third optimization unit is used for judging whether the equipment state of the similar equipment is over-degraded or degraded when the state level is in an acceptable state, if so, the maintenance strategy is kept unchanged, if not, whether the maintenance task needs to manage other fault modes is judged, if so, the state judgment device is triggered after feedback information of other fault modes is sequentially acquired, and otherwise, the execution period is prolonged.
In summary, the method and the device for optimizing the maintenance strategy of the nuclear power plant have the following advantages: according to the method, the state grade of the equipment is determined by collecting the feedback information and the currently determined maintenance strategy, and the task content or the execution period of the maintenance task under the current maintenance strategy is optimized or the maintenance strategy is maintained unchanged by combining the historical trend of the equipment fault, so that the usability and the reliability of each system of the power plant at a higher level are ensured, the service life management of the equipment is optimized, and the safe, reliable and effective operation of the power plant is ensured.
While the present invention has been described with reference to the embodiments shown in the drawings, the present invention is not limited to the embodiments, which are illustrative and not restrictive, and it will be apparent to those skilled in the art that various changes and modifications can be made therein without departing from the spirit and scope of the invention as defined in the appended claims.
Claims (2)
1. A method for optimizing a maintenance strategy of a nuclear power plant is characterized by comprising the following steps:
s1, acquiring feedback information corresponding to the maintenance strategy of the equipment aiming at the aging fault mode;
s2, determining the current state level of the equipment according to the feedback information and the currently determined maintenance strategy;
s3, optimizing the task content or the execution period of the maintenance strategy or keeping the maintenance strategy unchanged according to the state level determined in the step S2 and the historical trend of the equipment failure;
step S2 includes: if the high-risk fault phenomenon of the equipment can be determined according to the feedback information, and the current determined maintenance strategy cannot manage the fault phenomenon, judging that the equipment state is an unacceptable state; if the fault phenomenon of degradation or degeneration of the equipment component can be determined according to the feedback information, and the fault phenomenon can be eliminated after each maintenance task of the currently determined maintenance strategy is executed, the equipment state is judged to be a critical state; if the equipment fault phenomenon managed by the maintenance strategy can not occur when a certain maintenance task of the currently determined maintenance strategy is executed in a delayed mode or is not executed according to the feedback information, judging that the equipment state is in an acceptable state;
if the state level determined in step S2 is the unacceptable state, the step S3 includes:
s31a, judging whether the task content of the maintenance task in the maintenance strategy is unreasonable, if so, executing a step S32a, otherwise, executing a step S33 a;
s32a, optimizing the task content, and ending;
s33a, judging whether the execution cycle of the maintenance task is unreasonable, if so, executing a step S34a, otherwise, executing a step S35 a;
s34a, shortening the execution cycle of the maintenance task and ending;
s35a, maintaining the execution period unchanged, and adjusting the task content; or step S2 is switched to after the maintenance strategy corresponding to the failure mode is redetermined
If the state level determined in step S2 is the critical state, the step S3 includes:
s31b, judging whether the feedback information has a fixed trend or the equipment aging component has a predictable service life, if so, executing a step S32b, otherwise, executing a step S33 b;
s32b, according to the service life of the equipment components or the time trend of the equipment component failure mode operation, prolonging the execution period of the maintenance task and ending;
s33b, judging whether the maintenance task needs to manage other fault modes, if so, executing a step S34b, otherwise, entering a step S35 b;
s34b, keeping the execution period unchanged, and ending;
s35b, judging whether the equipment can normally work before the next maintenance task is executed according to the operation experience data of the power plant equipment, if so, executing a step S36b, otherwise, jumping to a step S34 b;
s36b, delaying the execution cycle of the maintenance task once;
if the state level determined in step S2 is the acceptable state, the step S3 includes:
s31c, judging whether the device state of the same type of device is over-degraded or degraded, if so, executing a step S32c, otherwise, executing a step S33 c;
s32c, the maintenance strategy is kept unchanged, and the operation is finished;
s33c, judging whether the maintenance task needs to manage other fault modes, if so, executing a step S34c, otherwise, entering a step S35 c;
s34c, sequentially acquiring feedback information of other failure modes and entering the step S2;
and S35c, prolonging the execution period.
2. A nuclear power plant maintenance strategy optimization device, comprising:
the feedback information acquisition device is used for acquiring feedback information corresponding to a maintenance strategy of the equipment aiming at the aging fault mode;
the state judgment device is used for determining the current state level of the equipment according to the feedback information and the currently determined maintenance strategy;
the optimization device is used for optimizing the task content or the execution period of the maintenance strategy or maintaining the maintenance strategy unchanged according to the determined state level and the historical trend of the equipment fault;
the state judgment device includes:
the first judgment unit is used for judging that the equipment state is in an unacceptable state when the equipment can be determined to have a high-risk fault phenomenon according to the feedback information and the current determined maintenance strategy cannot manage the fault mode corresponding to the fault phenomenon;
the second judgment unit is used for judging that the equipment state is a critical state when the fault phenomenon that the equipment part is degraded or degraded can be determined according to the feedback information and can be eliminated after each maintenance task of the currently determined maintenance strategy is executed;
the third judging unit is used for judging that the equipment state is in an acceptable state when the equipment running condition can be determined to be good according to the feedback information and the equipment fault phenomenon managed by the maintenance strategy cannot occur when a certain maintenance task of the currently determined maintenance strategy is executed in a delayed mode or is not executed;
the optimization device comprises a first optimization unit, a second optimization unit and a third optimization unit, wherein the first optimization unit is used for judging whether the task content of the maintenance task in the maintenance strategy is unreasonable or not when the state level is in an unacceptable state, optimizing the task content if the task content is unreasonable, judging whether the execution period of the maintenance task is unreasonable or not if the task content is reasonable, and optimizing the execution period of the maintenance task if the execution period is unreasonable; or after the maintenance strategy corresponding to the failure mode is determined again, the state judgment device is triggered again;
the optimization device comprises a second optimization unit, a second optimization unit and a second optimization unit, wherein the second optimization unit is used for judging whether the feedback information has a fixed trend or the equipment aging component has a predictable life when the state level is a critical state, and if so, the execution period of the maintenance task is prolonged according to the equipment component life or the time trend of the equipment component fault mode operation; if not, judging whether the maintenance task needs to manage other fault modes, if so, maintaining the execution period unchanged, if not, judging whether the equipment can normally work before the next maintenance task is executed according to the operation experience data of the power plant equipment, if so, delaying the execution period of the maintenance task once, and if not, maintaining the execution period unchanged;
the optimization device comprises a third optimization unit, which is used for judging whether the equipment state of the similar equipment is over-degraded or degraded when the state level is in an acceptable state, if so, the maintenance strategy is kept unchanged, if not, whether the maintenance task needs to manage other fault modes is judged, if so, the state judgment device is triggered after feedback information of other fault modes is sequentially acquired, otherwise, the execution period is prolonged.
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