CN108923529B - Intelligent substation secondary safety measure diagnosis method and system - Google Patents
Intelligent substation secondary safety measure diagnosis method and system Download PDFInfo
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Abstract
The invention provides a secondary safety measure diagnosis method and a secondary safety measure diagnosis system for an intelligent substation, wherein the operation states of a protection device and a safety automation device are divided into an operation scene, a signal scene, an exit scene and a maintenance scene, and the operation states of a merging unit and an intelligent terminal are divided into an operation scene and a maintenance scene; formulating secondary safety measure diagnosis rules corresponding to all scenes according to the divided scenes; and acquiring the running state information of the protection device, the safety automation device, the merging unit and the intelligent terminal in real time, comparing the acquired running state information with the corresponding secondary safety measure diagnosis rule according to the sequence of the scene rule, and judging whether the secondary misjudgment rule is met. The diagnosis purpose is definite, the diagnosis rule is perfect, the diagnosis of the secondary equipment is accurate, the secondary safety measure execution process is effectively monitored and intelligently prompted, and the reliable isolation of the equipment to be overhauled and the safety and stability of the equipment are ensured.
Description
Technical Field
The invention belongs to the technical field of power system automation, and particularly relates to a secondary safety measure diagnosis method and system for an intelligent substation.
Background
The secondary safety measure is used as a technical guarantee for dealing with field work such as defect elimination, overhaul, upgrade, reconstruction and extension after the operation of the transformer substation, and has important significance for ensuring the safety of primary and secondary equipment of the intelligent transformer substation and the stable operation of a power grid.
The pressing plate and the loop are main safety isolation objects in secondary safety measures, in an intelligent station secondary system adopting optical fiber communication and IEC61850 information modeling, visible hard wiring becomes optical fibers, real terminals become virtual terminals, hard pressing plates become soft pressing plates, the concept of maintenance pressing plates is introduced, more importantly, the influence of various soft pressing plates and maintenance pressing plates on the interoperation relationship between the device is far more complicated than that of a conventional station, and the new changes bring much difficulty to workers engaged in the establishment and execution of the secondary safety measures of the intelligent station. Along with the popularization and the promotion of intelligent substations, the operation and maintenance technology of the transformer substation is more and more emphasized by various large power grid companies, wherein secondary safety measures become especially important, and the reason for the secondary safety measures is that the secondary safety measures effectively and safely isolate equipment to be overhauled from equipment running, so that the safe and reliable running of a power grid during the overhaul of the transformer substation is ensured. The secondary safety measure of the intelligent substation is mainly divided into two parts of real and virtual. The real state refers to that before equipment is overhauled, an overhaul pressure plate is required to be put in, and an optical fiber containing a breaker, a disconnecting switch position, a tripping and closing command and analog quantity SV information is pulled out; the virtual signals are various signals transmitted through network messages in the intelligent substation.
At present, an analog quantity sampling loop of an intelligent substation adopts a 9-2 SV message, and information such as trip protection, opening and the like adopts a GOOSE message. When the intelligent substation is modified, expanded and maintained, the safety measure operation of the secondary equipment is mainly formed by combining multiple safety measure technologies such as a tripping and closing outlet pressing plate, a maintenance pressing plate, a GOOSE receiving pressing plate and a sending soft pressing plate, the secondary equipment has the characteristics of large number of pressing plates, unobtrusiveness, no obvious electrical breakpoints and the like, the safety measure steps are wrong due to insufficient personnel experience when the safety measure is established, and missing, mistaken switching and the like are easily caused in the manual operation process. Once errors, missed delivery and misdelivery occur, serious grid faults can be caused. For example, in a chinese patent having a publication number of "CN 105914892A," entitled "a secondary overhaul safety measure ticket system and an implementation method thereof," the safety measure ticket system proposed in the patent includes a model data management module, a real-time library, a history library, a graphic editor, and a safety measure ticket application module. The method for secondarily overhauling the safety measure tickets realizes a series of functional requirements of intelligent ticket planning, error check prevention, preview simulation, safety measure ticket management and visual display for the secondarily overhauled safety measure tickets, solves the problems of high difficulty and high error possibility of the traditional manual compilation of the secondary safety measure tickets, and improves the working efficiency of secondary operation and maintenance maintainers, but the secondary safety measure diagnosis system of the patent does not analyze the state and the scene of secondary equipment in detail before overhauling, so that the diagnosis is blindness and irregularity and the purpose is unclear; and the diagnosis rules of the rule base are not perfect enough, the pertinence is not strong enough, and the effective monitoring and intelligent prompting on the safety measure execution process cannot be carried out.
Disclosure of Invention
The invention aims to provide a secondary safety measure diagnosis method and a secondary safety measure diagnosis system for an intelligent substation, which are used for solving the problems of incomplete secondary safety measure diagnosis rules and unclear diagnosis purposes in the prior art.
In order to achieve the purpose, the invention provides a secondary safety measure diagnosis method for an intelligent substation, which comprises the following steps:
1) according to the types of the protection device and the safety automation device, the overhaul mark and the pressing plate switching-on/off state, dividing the operation states of the protection device and the safety automation device into an operation scene, a signal scene, a quitting scene and an overhaul scene, and dividing the operation states of the merging unit and the intelligent terminal into an operation scene and an overhaul scene;
2) formulating secondary safety measure diagnosis rules corresponding to all scenes according to the divided scenes;
3) and acquiring the running state information of the protection device, the safety automation device, the merging unit and the intelligent terminal in real time, comparing the acquired running state information with the corresponding secondary safety measure diagnosis rule according to the sequence of the scene rule, and judging whether the secondary misjudgment rule is met.
In order to adapt to the incidence relation among different secondary devices of the intelligent substation, when secondary safety measure diagnosis is carried out, a scene rule sequence is formulated for at least two devices which are associated with each other according to the sequence of an operation scene device soft pressing plate, an overhaul scene device soft pressing plate and an overhaul scene device overhaul pressing plate; for a single device, a scene rule sequence is established according to the sequence of an operation scene, a signal scene, an exit scene and a maintenance scene.
Further, if the secondary safety measure expert database diagnosis rule is not met, alarm information is generated.
In order to conveniently check the diagnosis result, when the acquired running state information of the protection device, the safety automation device, the merging unit and the intelligent terminal is compared with the secondary wrong diagnosis rule, a diagnosis result is generated, and the diagnosis result is displayed in a graphical mode.
Further, the diagnosis result comprises a state abnormity reason, an influence range and a solution suggestion.
The invention also provides a secondary safety measure diagnosis system of the intelligent substation, which comprises a scene analysis module, an acquisition module and a diagnosis module, wherein the scene analysis module is used for dividing the running states of the protection device and the safety automation device into a running scene, a signal scene, a quitting scene and a maintenance scene according to the types of the protection device and the safety automation device, the maintenance mark and the pressing plate switching-on and switching-off state, dividing the running states of the merging unit and the intelligent terminal into the running scene and the maintenance scene, and formulating a secondary safety measure diagnosis rule corresponding to each scene according to the divided scenes; the acquisition module is used for acquiring the running state information of the protection device, the safety automation device, the merging unit and the intelligent terminal in real time; the diagnosis module is used for comparing the collected running state information with the secondary safety measure diagnosis rule and judging whether the secondary misjudgment rule is met.
In order to adapt to the incidence relation among different secondary devices of the intelligent substation, when secondary safety measure diagnosis is carried out, a scene rule sequence is formulated for at least two devices which are associated with each other according to the sequence of an operation scene device soft pressing plate, an overhaul scene device soft pressing plate and an overhaul scene device overhaul pressing plate; for a single device, a scene rule sequence is established according to the sequence of an operation scene, a signal scene, an exit scene and a maintenance scene.
Further, if the secondary safety measure expert database diagnosis rule is not met, alarm information is generated.
In order to conveniently check the diagnosis result, when the acquired running state information of the protection device, the safety automation device, the merging unit and the intelligent terminal is compared with the secondary wrong diagnosis rule, a diagnosis result is generated, and the diagnosis result is displayed in a graphical mode.
Further, the diagnosis result comprises a state abnormity reason, an influence range and a solution suggestion.
The invention has the beneficial effects that:
according to the scheme provided by the invention, before the secondary equipment is overhauled, the state and the scene of the secondary equipment are analyzed in detail, a perfect secondary safety measure diagnosis rule is formulated, the running state information of the secondary equipment is collected in real time, and the collected running state information is compared with the secondary safety measure diagnosis rule, so that the secondary equipment is diagnosed, the diagnosis purpose is definite, the diagnosis of the secondary equipment is accurate, the secondary safety measure execution process is effectively monitored and intelligently prompted, and the reliable isolation of the equipment to be overhauled and the safety and stability of the equipment are ensured.
Drawings
FIG. 1 is a structural block diagram of a secondary safety measure diagnosis system of an intelligent substation according to the present invention;
FIG. 2 is a diagram illustrating a multi-scenario analysis transformation according to the present invention.
Detailed Description
The following further describes embodiments of the present invention with reference to the drawings:
the invention provides an intelligent substation secondary safety measure diagnosis system which comprises a scene analysis module, an acquisition module and a diagnosis module, wherein the scene analysis module is used for dividing the running states of a protection device and a safety automation device into a running scene, a signal scene, a quitting scene and a maintenance scene according to the types of the protection device and the safety automation device, an overhaul mark and a pressing plate switching-on/off state, dividing a merging unit and an intelligent terminal into the running scene and the maintenance scene, and formulating secondary safety measure diagnosis rules corresponding to all scenes according to the divided scenes; the acquisition module is used for acquiring the running state information of the protection device, the safety automation device, the merging unit and the intelligent terminal in real time; the diagnosis module is used for comparing the collected running state information with the secondary safety measure diagnosis rule and judging whether the secondary misjudgment rule is met.
Based on the intelligent substation secondary safety measure diagnosis system, the intelligent substation secondary safety measure diagnosis method is provided, and comprises the following steps:
1) according to the types of the protection device and the safety automation device, the overhaul mark and the pressing plate throwing-in and withdrawing state, the protection device and the safety automation device are divided into different scenes, and the merging unit and the intelligent terminal are divided into different scenes;
2) formulating a secondary safety measure expert database diagnosis rule corresponding to each scene according to the divided scenes;
3) the method comprises the steps of collecting running state information of a protection device, a safety automation device, a merging unit and an intelligent terminal in real time, classifying, arranging and analyzing collected information data, comparing the collected running state information with corresponding secondary safety measure diagnosis rules according to a scene rule sequence, and judging whether the secondary safety measure diagnosis rules are met.
Specifically, the running state information of the protection device, the safety automatic device, the merging unit and the intelligent terminal is collected in real time, a data source of the secondary fault-pressing diagnosis system is uploaded through a basic service platform of the intelligent substation, the service platform is a service support of data interaction of the intelligent substation, the service platform is a basic platform of communication and interaction between service processing service and equipment, and uploading of four-remote data and forwarding of equipment information are provided. And analyzing and diagnosing the running state information of the primary and secondary equipment of the power grid, which is acquired by the platform, as basic data. And comprehensively analyzing and formulating rules of the overhaul pressing plate, the functional pressing plate, the SV receiving pressing plate and the states of the GOOSE sending and receiving pressing plates according to the type of the equipment, the scene of the equipment, the running state of the equipment and the scene of the equipment with GOOSE association with the equipment.
In the process of secondary safety measure overhaul execution or recovery, the intelligent diagnosis system compares the recorded secondary safety measure operation ticket information with the acquired pressure plate state information of the related protection equipment, and checks whether the content and the sequence of the operation steps are correct and whether the pressure plate state is accurately returned or not according to the secondary safety measure expert diagnosis library of the corresponding scene and the established rules.
Wherein, the secondary safety measure operation ticket information of logging indicates to say that maintenance operation process is logged into the system, for example: in the implementation process of 'throwing the XX pressing plate and disconnecting the XX optical fiber.. et al', the system can monitor the actual operation process, and if wrong operation or missing operation occurs in the operation process, alarm information can be generated.
In the step 1), the state, the maintenance mark and the pressing plate state information of the protection device, the safety automation device, the merging unit and the intelligent terminal are combined into an environment, which is called as a scene. Therefore, the running states of the protection device and the safety automation device can be divided into a running scene, a signal scene, an exit scene and a maintenance scene; and dividing the running states of the merging unit and the intelligent terminal into a running scene and a maintenance scene. The expert database diagnosis rules corresponding to each scene are shown in table 1.
TABLE 1 expert database diagnosis rule Table corresponding to each scene
After the scenes are divided, when secondary safety measure diagnosis is carried out, setting a scene rule sequence for at least two devices which are mutually associated according to the sequence of an operation scene device soft pressing plate, an overhaul scene device soft pressing plate and an overhaul scene device overhaul pressing plate, namely, firstly executing a device soft pressing plate safety measure project of an operation scene associated with overhaul scene devices, then executing a related safety measure step of a soft pressing plate of the device under the overhaul scene, and finally executing a safety measure operation step of overhauling a hard pressing plate of the device under the overhaul scene; for a single device, a scene rule sequence is formulated according to the sequence of an operation scene, a signal scene, an exit scene and a maintenance scene, namely, according to a scene conversion rule, the operation device is sequentially switched from the operation scene to the signal scene, then switched to the exit scene, and finally switched to the maintenance scene, and when the operation is recovered, the scene switching operation is carried out according to the opposite direction.
As shown in fig. 2, firstly, whether the equipment is hung with the maintenance plate is detected, and if the equipment is hung with the maintenance plate, the running state of the equipment is converted into the maintenance scene; if the situation that the maintenance board is not hung on the equipment is detected, whether the GOOSE sending pressing plate completely exits is judged, if not, the operation scene is converted, if the GOOSE sending pressing plate completely exits, whether the protection function pressing plate exits is continuously judged, if not, the signal scene is converted, and if the protection function pressing plate exits, the quit scene is converted.
In this embodiment, when the collected device operating state information is compared with the secondary safety measure expert database diagnostic rule, if the secondary safety measure expert database diagnostic rule is not satisfied, the alarm information is generated, and a diagnostic result is generated. In order to ensure that the diagnosis result can be clearly displayed to operation and maintenance staff, the diagnosis result is displayed in a graphical mode. The diagnosis result includes many information, and the diagnosis result of the embodiment includes the cause of the abnormal state, the influence range and the solution suggestion.
The state of the secondary equipment is analyzed in detail based on the multi-scene analysis method, the rule diagnosis is performed pertinently, the problems encountered in the secondary overhaul safety measure of the intelligent substation are reflected to the substation operation and inspection personnel in an intelligent and visual mode, the errors in the safety measure execution of the operation and inspection personnel are prompted, analyzed and alarmed, the safety of the secondary safety measure execution of the intelligent substation is improved, and the reliable isolation of the overhaul equipment and the safety and stability of the operation equipment are ensured.
The specific embodiments are given above, but the present invention is not limited to the above-described embodiments. The basic idea of the present invention lies in the above basic scheme, and it is obvious to those skilled in the art that no creative effort is needed to design various modified models, formulas and parameters according to the teaching of the present invention. Variations, modifications, substitutions and alterations may be made to the embodiments without departing from the principles and spirit of the invention, and still fall within the scope of the invention.
Claims (10)
1. A secondary safety measure diagnosis method for an intelligent substation is characterized by comprising the following steps:
1) according to the types of the protection device and the safety automation device, the overhaul mark and the pressing plate switching-on/off state, dividing the operation states of the protection device and the safety automation device into an operation scene, a signal scene, a quitting scene and an overhaul scene, and dividing the operation states of the merging unit and the intelligent terminal into an operation scene and an overhaul scene;
2) formulating secondary safety measure diagnosis rules corresponding to all scenes according to the divided scenes;
3) acquiring running state information of the protection device, the safety automation device, the merging unit and the intelligent terminal in real time, comparing the acquired running state information with corresponding secondary safety measure diagnosis rules according to the sequence of scene rules, and judging whether the secondary safety measure diagnosis rules are met;
the secondary safety measure diagnosis rule corresponding to the exit scene is as follows: a. the maintenance pressing plate is withdrawn, all the functional pressing plates are withdrawn, and all the GOOSE sending pressing plates are withdrawn; b. the SV receives the pressing plate to be put into operation at intervals; c. when the equipment is in cold standby at an interval, the SV receiving pressing plate exits when the associated merging unit is in an overhaul scene; d. when the equipment with the GOOSE association with the equipment is in a maintenance scene, the GOOSE receiving pressing plate corresponding to the equipment exits; e. when the equipment runs at intervals, and the equipment which is associated with the GOOSE of the equipment is in a non-overhaul scene, the corresponding GOOSE receives the pressing plate input.
2. The intelligent substation secondary safety measure diagnosis method according to claim 1, wherein when secondary safety measure diagnosis is performed, a scene rule sequence is formulated according to the sequence of operation scene device soft pressing plate-overhaul scene device overhaul pressing plate for at least two devices which are mutually associated; for a single device, a scene rule sequence is established according to the sequence of an operation scene, a signal scene, an exit scene and a maintenance scene.
3. The intelligent substation secondary safety measure diagnosis method according to claim 1 or 2, characterized in that if the secondary safety measure expert database diagnosis rule is not satisfied, alarm information is generated.
4. The intelligent substation secondary safety measure diagnosis method according to claim 1, wherein when the collected operation state information of the protection device, the safety automation device, the merging unit and the intelligent terminal is compared with a secondary safety measure diagnosis rule, a diagnosis result is generated, and the diagnosis result is displayed in a graphical mode.
5. The intelligent substation secondary safety measure diagnosis method according to claim 4, wherein the diagnosis result comprises a state abnormity reason, an influence range and a solution suggestion.
6. The secondary safety measure diagnosis system of the intelligent substation is characterized by comprising a scene analysis module, an acquisition module and a diagnosis module, wherein the scene analysis module is used for dividing the running states of a protection device and a safety automation device into a running scene, a signal scene, a quitting scene and a maintenance scene according to the types of the protection device and the safety automation device, an overhaul mark and a pressing plate switching-on/off state, dividing the running states of a merging unit and an intelligent terminal into the running scene and the maintenance scene, and formulating secondary safety measure diagnosis rules corresponding to all scenes according to the divided scenes; the acquisition module is used for acquiring the running state information of the protection device, the safety automation device, the merging unit and the intelligent terminal in real time; the diagnosis module is used for comparing the collected running state information with the secondary safety measure diagnosis rule and judging whether the secondary safety measure diagnosis rule is met;
the secondary safety measure diagnosis rule corresponding to the exit scene is as follows: a. the maintenance pressing plate is withdrawn, all the functional pressing plates are withdrawn, and all the GOOSE sending pressing plates are withdrawn; b. the SV receives the pressing plate to be put into operation at intervals; c. when the equipment is in cold standby at an interval, the SV receiving pressing plate exits when the associated merging unit is in an overhaul scene; d. when the equipment with the GOOSE association with the equipment is in a maintenance scene, the GOOSE receiving pressing plate corresponding to the equipment exits; e. when the equipment runs at intervals, and the equipment which is associated with the GOOSE of the equipment is in a non-overhaul scene, the corresponding GOOSE receives the pressing plate input.
7. The intelligent substation secondary safety measure diagnosis system according to claim 6, wherein when secondary safety measure diagnosis is performed, a scene rule sequence is formulated according to the sequence of operation scene equipment soft pressing plate-overhaul scene equipment overhaul pressing plate for at least two pieces of equipment which are mutually associated; for a single device, a scene rule sequence is established according to the sequence of an operation scene, a signal scene, an exit scene and a maintenance scene.
8. The intelligent substation secondary safety measure diagnosis system according to claim 6 or 7, further comprising an alarm module, wherein if the secondary safety measure expert database diagnosis rule is not satisfied, the alarm module generates alarm information.
9. The intelligent substation secondary safety measure diagnosis system according to claim 6, wherein the diagnosis module generates a diagnosis result when comparing the collected operation state information of the protection device, the safety automation device, the merging unit and the intelligent terminal with the secondary safety measure diagnosis rule, and the diagnosis result is displayed in a graphical manner.
10. The intelligent substation secondary safety measure diagnosis system according to claim 9, wherein the diagnosis result comprises a state anomaly reason, an influence range and a solution suggestion.
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