CN113485281B - Method and system for generating measuring point alarm and reset information in background of distributed control system - Google Patents
Method and system for generating measuring point alarm and reset information in background of distributed control system Download PDFInfo
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- G05B19/41865—Total factory control, i.e. centrally controlling a plurality of machines, e.g. direct or distributed numerical control [DNC], flexible manufacturing systems [FMS], integrated manufacturing systems [IMS] or computer integrated manufacturing [CIM] characterised by job scheduling, process planning, material flow
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Abstract
The invention discloses a method and a system for generating measuring point alarm and reset information in a background of a distributed control system, wherein the method comprises the following steps: deploying a real-time database, and establishing a measuring point information table; judging a real-time value in an analog measuring point information table in a real-time database of the upper computer and an alarm out-of-limit threshold value of the measuring point to obtain an analog measuring point out-of-line state result; comparing the line crossing state result of the measuring point with the alarm state stored in the library; judging the measuring point alarm state of the switching value according to the real-time value and the alarm mode in the switching value measuring point information table in the upper computer real-time database; comparing the judged measuring point alarm state result with the alarm state stored in the library; and finishing the background alarm generation process, and continuing to perform next round of background alarm detection after waiting for a fixed period of time. The method can prevent the hidden monitoring trouble caused by the loss of the alarm and the reset message. The condition that messages are lost due to communication between the upper computer and the lower computer is avoided, and the operation safety of the control system is improved.
Description
Technical Field
The invention relates to an alarm method of a distributed control system, in particular to a method and a system for generating measuring point alarm and reset information at a background of the distributed control system.
Background
In the distributed control system, if the value of the measuring point is abnormal, the process control station of the lower computer sends a process alarm message to an alarm receiving module of the upper computer and sends alarm information of the measuring point, such as analog quantity out-of-limit alarm action and switching value alarm action; if the measured point value is changed from abnormal to normal, the lower computer process control station sends a reset message to the background, and sends the information of the measured point reset, such as analog quantity out-of-limit alarm reset and switching quantity alarm reset. And after receiving the alarm message and the reset message, an alarm receiving module of the upper computer analyzes and updates the alarm state information in the measuring point information table of the real-time database, generates a process alarm event or an alarm reset event at the same time, and sends the process alarm event or the alarm reset event to other processes for processing. However, the condition of message loss may occur due to communication between the upper computer and the lower computer, at this time, the alarm and reset messages of the lower computer cannot be timely sent to the upper computer, and the upper computer cannot timely check the alarm and reset information of the measuring point, so that the operation hidden danger of the control system is increased.
Disclosure of Invention
In order to solve the above defects in the prior art, the present invention aims to provide a method and a system for generating station alarm and reset information by background software of a distributed control system, so as to prevent hidden monitoring troubles caused by loss of alarm and reset messages.
The invention is realized by the following technical scheme.
In one aspect of the invention, a method for generating measuring point alarm and reset information in a background of a distributed control system is provided, which comprises the following steps:
deploying a real-time database, and establishing a measuring point information table, wherein the measuring point information table comprises an analog measuring point information table and a switch measuring point information table;
each analog measurement point information table includes: a measured point value, an alarm out-of-limit threshold value, a current out-of-limit state, an alarm type, whether an alarm is in progress or not and whether an alarm is confirmed or not;
each switching measurement point includes: measuring a point value, an alarm mode, whether an alarm is in progress or not and whether the alarm is confirmed or not;
the measured point value is a real-time value of the measured point;
judging a real-time value in an analog measuring point information table in a real-time database of the upper computer and an alarm out-of-limit threshold value of the measuring point to obtain an analog measuring point out-of-line state result; comparing the simulation measuring point crossing state result with the alarm state stored in the library, and if the simulation measuring point crossing state result is inconsistent with the alarm state stored in the library, generating simulation measuring point alarm or reset information; and storing and displaying the alarm or reset information;
judging the alarm state of the switch measuring point according to the real-time value and the alarm mode in the switch measuring point information table in the upper computer real-time database; comparing and judging the alarm state result of the switch measuring point with the alarm state stored in the library, and if the alarm state result of the switch measuring point is inconsistent with the alarm state stored in the library, generating alarm or reset information of the switch measuring point; and storing and displaying the alarm or reset information.
With respect to the above technical solutions, the present invention has a further preferable solution:
further, there are two alarm modes: 1, alarming, namely alarming when the switching value is 1; and (4) alarming at 0, namely alarming when the switch value is 0.
Further, the alarm violation threshold includes 6 thresholds: the high-high out-of-limit threshold value, the low out-of-limit threshold value and the low out-of-limit threshold value are sequentially reduced in numerical value;
the current out-of-limit state reflects the current alarm out-of-limit state of the measuring point, and comprises 7 states: normal, higher upper limit, higher limit, lower limit, and lower limit;
the alarm types comprise no alarm, static alarm and dynamic alarm;
no alarm indicates that no alarm information is generated at the current measuring point; the static alarm indicates that the alarm threshold crossing value of the measuring point does not change and is consistent with the alarm threshold crossing value in the real-time database; the dynamic alarm shows that the alarm threshold value of the measuring point is dynamic change and is inconsistent with the alarm threshold value in the library.
Further, generating alarm or reply information, including:
traversing effective measuring point information in an analog measuring point information table in a real-time database, and determining whether to perform background alarm detection according to the alarm type;
according to the judgment result of the out-of-limit state of the current measuring point and whether the measuring point in the database is giving an alarm or not and the current out-of-limit state, determining whether to update the alarm state or not and sending an alarm event or an alarm reset event;
if the analog measuring points have undetected effective analog measuring points, the threshold crossing state of the next measuring point is continuously checked; otherwise, the alarm state judgment of the measuring point of the switching value is executed.
Further, determining whether to perform background alarm detection according to the alarm type includes:
if the current measuring point alarm mode is dynamic alarm, the analog measuring point information table has undetected effective analog measuring points, and the out-of-limit state of the next measuring point is continuously checked; otherwise, judging the measuring point alarm state of the switching value;
and if the alarm type of the current measuring point is static alarm, judging the out-of-limit state of the current measuring point according to the real-time value and the out-of-limit threshold of the analog measuring point in the library.
Further, judging the current measuring point out-of-limit state comprises the following steps:
if the real-time value of the current analog measurement point is greater than the high-high out-of-limit threshold value of the point, the out-of-limit state is in the high-high out-of-limit state, the alarm state is determined to be updated, and an alarm event or an alarm reset event is sent;
if the real-time value of the current analog measurement point is greater than the high-high out-of-limit threshold value of the point, the out-of-limit state is in a high-high limit state, the alarm state is determined to be updated, and an alarm event or an alarm reset event is sent;
if the real-time value of the current analog measurement point is larger than the high out-of-limit threshold value of the point, the out-of-limit state is in the out-of-limit state, the alarm state is determined to be updated, and an alarm event or an alarm reset event is sent;
if the real-time value of the current analog measurement point is smaller than the low-low out-of-limit threshold value of the point, the out-of-limit state is in the lower low-low limit state, the alarm state is determined to be updated, and an alarm event or an alarm reset event is sent;
if the real-time value of the current analog measurement point is smaller than the low out-of-limit threshold value of the point, the out-of-limit state is in the lower out-of-limit state, the alarm state is determined to be updated, and an alarm event or an alarm reset event is sent;
if the real-time value of the current analog measurement point is smaller than the low out-of-limit threshold value of the point, the out-of-limit state is in the lower limit, the alarm state is determined to be updated, and an alarm event or an alarm reset event is sent;
and if the real-time value of the current analog measurement point is greater than the low out-of-limit threshold value of the point and less than the high out-of-limit threshold value of the measurement point, the out-of-limit state is in a normal state, the alarm state is determined to be updated, and an alarm event or an alarm reset event is sent.
Further, according to the judgment result of the out-of-limit state of the current measuring point and whether the measuring point in the database is giving an alarm or not and the current out-of-limit state, whether the alarm state is updated or not is determined, and an alarm event or an alarm reset event is sent, which specifically comprises the following steps:
if the judgment result is that the current measuring point is in the out-of-limit state, but the value of the field which is giving an alarm in the library is 0 or the current out-of-limit state is incorrect, setting the field which is giving an alarm to be 1 or not, setting the field which is giving an alarm to be 0 or not, and generating an alarm event; sending a process alarm event to other processes for processing, and if an undetected effective analog measurement point exists in the analog measurement point information table, continuously checking the out-of-limit state of the next measurement point; otherwise, executing the measuring point alarm state judgment of the switching value;
if the judgment result is that the current measuring point is in a normal state, but the alarming field of the measuring point in the measuring point information table in the database is 1, setting the alarming field of the measuring point to be 0, generating an alarming event, and sending an alarming return event to other processes for processing.
Further, according to the real-time value of the switching value measuring point and the alarm mode in the upper computer real-time database, the method for judging the measuring point alarm state of the switching value comprises the following steps:
and judging the alarm state of the measuring point according to the real-time value and the alarm mode of the switch measuring point in the database:
if the real-time value field of the current switch measurement point in the database is 1 and the alarm mode field is 1 for alarm, or if the real-time value field of the current switch measurement point is 0 and the alarm mode field is 0 for alarm, generating an alarm event and sending the process alarm event to other processes for processing;
if the real-time value field of the current switch measurement point in the database is 1 and the alarm mode field is 0 for alarm, or the real-time value field of the current switch measurement point is 0 and the alarm mode field is 1 for alarm, generating an alarm resetting event and sending the process alarm resetting event to other processes for processing;
if the analog quantity switch meter has an undetected effective switch measuring point, the step 21 is continued to check the alarm state of the next measuring point, otherwise, the lower wheel background alarm detection is carried out.
Further, the alarm event and the alarm reset event comprise event content and station information, wherein:
the alarm event content is that the analog quantity exceeds xx limit actions and comes from background detection or the switching value alarm action and comes from background detection, and xx represents an out-of-limit state; the content of the alarm resetting event is 'analog quantity alarm resetting from background detection' or 'switching value alarm resetting from background detection';
the station information includes station identification names and position information.
In another aspect of the present invention, a system for generating station alarm and reset information in a background of a distributed control system is further provided, including:
the real-time database is used for establishing an analog measuring point information table and a switch measuring point information table;
judging a real-time value in an analog measuring point information table in a real-time database of the upper computer and an alarm out-of-limit threshold value of the measuring point to obtain an analog measuring point out-of-line state result;
judging the measuring point alarm state of the switching value according to the real-time value and the alarm mode in the switching value measuring point information table in the upper computer real-time database;
and comparing the measured point alarm state results of the analog quantity and the switching value with the alarm state stored in the library to generate alarm or reset information.
Due to the adoption of the technical scheme, the invention has the following beneficial effects:
in the method, an upper computer is adopted to periodically scan the real-time value of a measuring point in a library and compare the real-time value with an out-of-limit threshold value, the out-of-limit state of the measuring point is judged, and then whether an alarm and a reset message event are generated or not is determined by combining the current alarm state of the measuring point. Because the communication between the upper computer and the lower computer can cause the problem of message loss, the method timely sends the alarm and reset messages of the lower computer to the upper computer, and the upper computer timely checks and receives the alarm and reset information of the measuring points, thereby avoiding the hidden trouble of operation of the control system and improving the operation safety of the control system.
Drawings
The accompanying drawings, which are included to provide a further understanding of the invention and are incorporated in and constitute a part of this application, illustrate embodiment(s) of the invention and together with the description serve to explain the principles of the invention:
FIG. 1 is a block flow diagram of the present invention;
FIG. 2 is a block diagram of the process of determining an analog alarm over-line state according to the present invention;
FIG. 3 is a block diagram of the process of determining the switching value alarm over-line state according to the present invention.
Detailed Description
The present invention will now be described in detail with reference to the drawings and specific embodiments, wherein the exemplary embodiments and descriptions of the present invention are provided to explain the present invention without limiting the invention thereto.
As shown in FIG. 1, the method for generating the station alarm and reset information in the background of the distributed control system of the invention comprises the following steps:
step 1, deploying a real-time database, and establishing a measuring point information table for dispersing measuring point information in a control system. The measuring point information table comprises an analog measuring point information table and a switch measuring point information table:
each analog measurement point information table includes: a point measurement value, an alarm out-of-limit threshold, a current out-of-limit state, an alarm type, whether an alarm is in progress, whether an alarm is confirmed, and the like. The alarm out-of-limit threshold includes 6: the high-high out-of-limit threshold, the low out-of-limit threshold, and the low out-of-limit threshold are sequentially reduced in value. The current out-of-limit state reflects the current alarm out-of-limit state of the measuring point, and comprises 7 states: normal, higher upper limit, higher limit, lower limit. The alarm type includes three types of alarm, static alarm and dynamic alarm, wherein the alarm-free state indicates that no alarm information is generated at the current measuring point, the static alarm indicates that the measuring point is unchanged in alarm threshold value and is consistent with the alarm threshold value in the real-time library, and the dynamic alarm indicates that the alarm threshold value of the measuring point is dynamically changed and possibly is inconsistent with the library.
Each of the switching value measurement point information tables includes: a point measurement value, an alarm mode, whether an alarm is in progress, whether an alarm is confirmed, and the like. The alarm mode has two kinds: 1, alarming, namely alarming when the switching value is 1; and (5) alarming at 0, and alarming when the switching value is 0. Other attributes are synonymous with the analog attributes.
Wherein the measuring point value is a real-time value of the measuring point.
Step 2, judging a real-time value in an analog measuring point information table in an upper computer real-time database and an alarm out-of-limit threshold value of the measuring point to obtain an analog measuring point out-of-line state result; comparing the simulation measuring point crossing state result with the alarm state stored in the library, and if the simulation measuring point crossing state result is inconsistent with the alarm state stored in the library, generating alarm or reset information; and storing and displaying the alarm or reset information. As shown in fig. 2. Specifically, the method comprises the following steps:
step 21, traversing effective measuring point information in an analog measuring point information table in the real-time database, and determining whether to perform background alarm detection according to an alarm mode:
step 201, if the current measuring point alarm mode alarms dynamically, executing step 23.
Step 202, if the alarm mode of the current measuring point is static alarm, judging the out-of-limit state of the current measuring point according to the real-time value and the out-of-limit threshold value of the analog measuring point in the library:
(1) if the real-time value of the current analog measurement point is greater than the high-high out-of-limit threshold of the point, the out-of-limit state is in a high-high out-of-limit state, and step 22 is executed;
(2) if the real-time value of the current analog measurement point is greater than the high-high out-of-limit threshold value of the point, the out-of-limit state is in a high-high limit, and step 22 is executed;
(3) if the real-time value of the current analog measurement point is greater than the high out-of-limit threshold value of the point, the out-of-limit state is in an out-of-limit state, and step 22 is executed;
(4) if the real-time value of the current analog measurement point is smaller than the lower and lower threshold values of the point, the lower and lower threshold values of the out-of-limit state are, and step 22 is executed;
(5) if the real-time value of the current analog measurement point is smaller than the low-low out-of-limit threshold value of the point, the out-of-limit state is in a lower low limit, and step 22 is executed;
(6) if the real-time value of the current analog measurement point is smaller than the low out-of-limit threshold value of the point, the out-of-limit state is in the lower limit, and step 22 is executed;
(7) if the real-time value of the current analog measurement point is greater than the low threshold of the point and less than the high threshold of the point, the out-of-limit state is in the normal state, and step 22 is executed.
And step 22, determining whether to generate an alarm state and sending an alarm event or an alarm resetting event according to the judgment result of the out-of-limit state of the current measuring point in the step 21 and whether the measuring point in the database is giving an alarm or not and the current out-of-limit state.
Step 221, if the judgment result is that the current measuring point is in the out-of-limit state, but the value of the alarm field in the library is 0, that is, the current measuring point is not in the alarm state, or the current out-of-limit state is incorrect, setting the alarm field in the library to be 1, setting the alarm confirmation field to be 0, generating an alarm event, wherein the alarm event comprises event content and measuring point information, the event content is that the analog quantity exceeds xx limit action and comes from background detection, xx represents the out-of-limit state, the measuring point information comprises measuring point identification names, position information and the like, sending the process alarm event to other processes for processing, and executing step 23.
Step 222, if the judgment result is that the current measuring point is in a normal state, but the alarm field of the measuring point in the measuring point information table in the database is 1, setting the alarm field of the measuring point to be 0, and generating an alarm resetting event; the alarm resetting event comprises event content and measuring point information, wherein the event content is analog quantity alarm resetting and comes from background detection, the measuring point information comprises a measuring point identification name, position information and the like, and the alarm resetting event is sent to other processes for processing.
Step 23, if there are no valid analog measurement points detected in the analog measurement point information table, continue step 201 to check the out-of-limit status of the next measurement point, otherwise, execute step 3.
Step 3, judging the measuring point alarm state of the switching value according to a real-time value and an alarm mode in a switching value information table in a real-time database of the upper computer; comparing the judged alarm state result of the measuring point with the alarm state stored in the library, and if the alarm state result of the measuring point is inconsistent with the alarm state stored in the library, generating alarm or reset information; and storing and displaying the alarm or reset information. As shown in fig. 3, specifically:
step 31, according to the real-time value and the alarm mode of the switch measuring point in the database, judging the alarm state of the measuring point:
step 311, if the real-time value field of the current switch measurement point in the database is 1, and the alarm mode field is 1 for alarm, or the real-time value of the current switch measurement point is 0, and the alarm mode field is 0 for alarm, when the measurement point is not in the alarm state field in the database, setting whether the measurement point is in the alarm field is 1, and the alarm confirmation field is 0, and generating an alarm event, wherein the alarm event includes event content and measurement point information, the event content is "switch amount alarm action, and comes from background detection", and the measurement point information includes measurement point identification name, position information, etc., and sending the process alarm event to other processes for processing.
Step 312, if the real-time value field of the current switch measurement point in the database is 1 and the alarm mode field is 0 for alarm, or the real-time value of the current switch measurement point is 0 and the alarm mode field is 1 for alarm, when the measurement point is in the alarm state field in the database, setting whether the measurement point is in the alarm state field to be 0, and generating an alarm resetting event; the alarm resetting event comprises event content and measuring point information, wherein the event content is 'switching value alarm resetting from background detection', the measuring point information comprises a measuring point identification name, position information and the like, and the process alarm resetting event is sent to other processes for processing.
Step 313, if there are no effective switch measuring points detected in the switch measuring point information table, the step 31 is continued to check the alarm state of the next measuring point, otherwise, the step 4 is executed.
And 4, finishing the background alarm generation process of the round, and continuing to execute the step 1 to perform next round of background alarm detection after waiting for a fixed period of time.
The embodiment of the invention also provides a system for generating the measuring point alarm and reset information by the background of the distributed control system, which comprises the following steps:
the real-time database is used for establishing a measuring point information table, and the measuring point information table comprises an analog measuring point information table and a switch measuring point information table;
judging a real-time value in an analog measuring point information table in a real-time database of the upper computer and an alarm out-of-limit threshold value of the measuring point to obtain an analog measuring point out-of-line state result;
judging the measuring point alarm state of the switching value according to the real-time value and the alarm mode in the switching value measuring point information table in the upper computer real-time database;
and comparing the measured point alarm state results of the analog quantity and the switching value with the alarm state stored in the library to generate alarm or reset information.
The invention is further illustrated by the following specific example.
Step 1, deploying a real-time database, and establishing a measuring point information table for dispersing measuring point information in a control system. The measuring point information table comprises an analog measuring point information table and a switch measuring point information table:
the analog measurement point information table includes: a point measurement value, an alarm out-of-limit threshold, a current out-of-limit state, an alarm type, whether an alarm is in progress, whether an alarm is confirmed, and the like.
The switching value measurement point information table includes: a point measurement value, an alarm mode, whether an alarm is in progress, whether an alarm is confirmed, and the like.
The measured point value of a certain analog measurement point AI1 is 50, and the alarm out-of-limit threshold value of the measured point is as follows: the high-high out-of-limit threshold is 80, the high-high out-of-limit threshold is 40, the high out-of-limit threshold is 20, the low out-of-limit threshold is-40, the low out-of-limit threshold is-80, the out-of-alarm type is static alarm, the current out-of-limit state of the point in the library is in a normal state, whether the alarm is currently 0 or not, and whether the alarm is actually 0 or not. The alarm mode of a certain switch measurement point DI1 is 1 alarm, the current value is 1, the alarm state of the point in the library is normal, whether the alarm is 0 or not, and whether the alarm is confirmed to be 0 or not.
Step 2, judging a real-time value (a measured point value is the real-time value of a measured point) in an analog measured point information table in the upper computer real-time database and an alarm out-of-limit threshold value of the measured point to obtain an analog measured point out-of-line state result; comparing the line crossing state result of the measuring point with the alarm state stored in the library, and if the line crossing state result of the measuring point is inconsistent with the alarm state stored in the library, generating alarm or reset information; and storing and displaying the alarm or reset information.
As shown in fig. 2, taking the analog measurement point AI1 as an example:
the measured point value of the analog measurement point AI1 is 50, and the measured point value is compared with the alarm out-of-limit threshold value of the measured point, and the measured point value of the point is smaller than the high-height out-of-limit threshold value 80 of the point and larger than the high-height out-of-limit threshold value 40 of the point, so that the out-of-limit state of the point is higher and higher, the alarm state of the point stored in the library at the moment is compared with normal, and the out-of-limit state is inconsistent with the state in the library, thereby indicating that the alarm message is lost. Setting the alarm field of the analog measurement point AI1 as 1 and the alarm confirmation field as 0, generating an alarm event, wherein the alarm event comprises event content and measurement point information, the event content is 'action of higher limit of analog quantity and higher limit of analog quantity, from background detection', the measurement point information comprises a measurement point identification name AI1, position information of the measurement point and the like, and sending the process alarm event to other processes for processing.
Step 3, judging the alarm state of the measuring point of the switching value according to a real-time value (a measuring point value is the real-time value of the measuring point) and an alarm mode in a switching value information table in a real-time database of the upper computer; comparing the judged alarm state result of the measuring point with the alarm state stored in the library, and if the alarm state result of the measuring point is inconsistent with the alarm state stored in the library, generating alarm or reset information; and storing and displaying the alarm or reset information.
Taking the on-off measurement point DI1 as an example:
the alarm mode of the switch measurement point DI1 is 1 alarm, the current value is 0, the out-of-limit state of the point is normal, the alarm state of the point in the comparison library is 1 alarm, the out-of-limit state is inconsistent with the state in the library, and the condition that the alarm resetting message is lost is shown. And if the alarm field of the switch setting measuring point DI1 is 0, the alarm confirmation field is 0, and an alarm resetting event is generated, wherein the alarm resetting event comprises event content and measuring point information, the event content is 'switch amount alarm resetting and comes from background detection', the measuring point information comprises a measuring point identification name switch measuring point DI1, the measuring point position information and the like, and the process alarm resetting event is sent to other processes for processing.
The embodiment solves the problems that the alarm message with higher limit at the measuring point of the analog quantity AI1 is lost and the alarm recovery message is lost after the measuring point 1 of the switching quantity DI1 is changed to 0, and achieves the aims of uploading the alarm and recovery conditions of the lower computer to the upper computer in time and searching the alarm and recovery information of the received measuring point by the upper computer in time. Similar to the above example, the method can also realize that the analog quantity alarm resetting and the switching value alarm condition of the lower computer are uploaded to the upper computer in time, and the upper computer searches the alarm and resetting information of the received measuring point in time, so the method improves the operation safety of the control system.
The present invention is not limited to the above-mentioned embodiments, and based on the technical solutions disclosed in the present invention, those skilled in the art can make some substitutions and modifications to some technical features without creative efforts according to the disclosed technical contents, and these substitutions and modifications are all within the protection scope of the present invention.
Claims (10)
1. A method for generating measuring point alarm and reset information in a background of a distributed control system is characterized by comprising the following steps:
deploying a real-time database, and establishing an information table comprising an analog measuring point and a switch measuring point;
judging the real-time value of the analog measuring point in the real-time database of the upper computer and the alarm out-of-limit threshold value of the measuring point to obtain an out-of-limit state result of the analog measuring point; comparing the out-of-limit state result of the analog measurement point with the alarm state stored in the library, and if the out-of-limit state result of the analog measurement point is inconsistent with the alarm state stored in the library, generating alarm or reset information; and storing and displaying the alarm or reset information;
judging the alarm state of the switch measuring point according to the switch measuring point real-time value and the alarm mode in the upper computer real-time database; comparing and judging the alarm state result of the switch measuring point with the alarm state stored in the library, and if the alarm state result of the switch measuring point is inconsistent with the alarm state stored in the library, generating alarm or reset information; and storing and displaying the alarm or reset information.
2. The method for generating station alarm and reset information in the background of a decentralized control system according to claim 1, wherein each analog measurement point comprises: a measured point value, an alarm out-of-limit threshold value, a current out-of-limit state, an alarm type, whether an alarm is in progress or not and whether an alarm is confirmed or not;
the measured point value is a real-time value of the measured point;
the alarm violation threshold includes 6 thresholds: the high-high out-of-limit threshold value, the low out-of-limit threshold value and the low out-of-limit threshold value are sequentially reduced in numerical value;
the current out-of-limit state reflects the current alarm out-of-limit state of the measuring point, and comprises 7 states: normal, higher upper limit, higher limit, lower limit, and lower limit;
the alarm-crossing types comprise no alarm, static alarm and dynamic alarm;
no alarm indicates that no alarm information is generated at the current measuring point; the static alarm represents that the alarm threshold value of the measuring point is unchanged and is consistent with the alarm threshold value in the real-time library; the dynamic alarm shows that the alarm threshold value of the measuring point is dynamic change and is inconsistent with the alarm threshold value in the library.
3. The method for generating station alarm and reset information in the background of the decentralized control system according to claim 1, wherein each switch measurement point comprises: measuring a point value, an alarm mode, whether an alarm is in progress or not and whether the alarm is confirmed or not;
the alarm mode comprises two modes: 1, alarming, namely alarming when the switching value is 1; and (4) alarming at 0, namely alarming when the switch value is 0.
4. The method for generating station alarm and reset information in the background of the decentralized control system according to claim 1, wherein generating alarm or reset information comprises:
traversing effective measuring point information in an analog measuring point information table in a real-time library, and determining whether to perform background alarm detection according to an alarm mode;
determining whether to update the alarm state and send an alarm event or an alarm reset event according to the judgment result of the out-of-limit state of the current measuring point, whether the measuring point is in the alarm field or not in the database and the content of the field of the current out-of-limit state;
if the analog measurement point information table has undetected effective analog measurement points, the threshold crossing state of the next measurement point is continuously checked; otherwise, the alarm state judgment of the measuring point of the switching value is executed.
5. The method for generating station alarm and reset information in the background of the decentralized control system according to claim 4, wherein determining whether to perform background alarm detection according to the alarm mode comprises:
if the current measuring point alarm mode is non-static alarm, the analog measuring point information table has undetected effective analog measuring points, and the out-of-limit state of the next measuring point is continuously checked; otherwise, judging the measuring point alarm state of the switching value;
if the current measuring point alarming mode is static alarming, the out-of-limit state is judged according to the real-time value and the out-of-limit threshold value of the analog measuring point in the library, and the out-of-limit state of the current measuring point is judged.
6. The method for generating the station alarm and reset information at the background of the decentralized control system according to claim 5, wherein the determining the current station out-of-limit state comprises:
if the real-time value of the current analog measurement point is greater than the high-high out-of-limit threshold value of the point, the out-of-limit state is in the high-high out-of-limit state, the alarm state is determined to be updated, and an alarm event or an alarm reset event is sent;
if the real-time value of the current analog measurement point is larger than the high-high out-of-limit threshold value of the point, the out-of-limit state is in a high-high limit state, the alarm state is updated, and an alarm event or an alarm reset event is sent;
if the real-time value of the current analog measurement point is larger than the high out-of-limit threshold value of the point, the out-of-limit state is in the out-of-limit state, the alarm state is updated, and an alarm event or an alarm reset event is sent;
if the real-time value of the current analog measurement point is smaller than the low-low out-of-limit threshold value of the point, the out-of-limit state is in the lower low-low limit state, the alarm state is updated, and an alarm event or an alarm reset event is sent;
if the real-time value of the current analog measurement point is smaller than the low out-of-limit threshold value of the point, the out-of-limit state is in the lower out-of-limit state, the alarm state is determined to be updated, and an alarm event or an alarm reset event is sent;
if the real-time value of the current analog measurement point is smaller than the low out-of-limit threshold value of the point, the out-of-limit state is in the lower limit, the alarm state is updated, and an alarm event or an alarm reset event is sent;
and if the real-time value of the current analog measurement point is greater than the low out-of-limit threshold value of the point and less than the high out-of-limit threshold value of the measurement point, the out-of-limit state is in a normal state, the alarm state is updated, and an alarm event or an alarm reset event is sent.
7. The method for generating alarm and reset information of the measuring points in the background of the decentralized control system according to claim 4, wherein according to the judgment result of the out-of-limit state of the current measuring point and the contents of the alarm field and the current out-of-limit state field of the measuring point in the database, whether to update the alarm state and send the alarm event or the alarm reset event is determined, and specifically comprises the following steps:
if the judgment result is that the current measuring point is in the out-of-limit state, but the value of the field which is giving an alarm in the library is 0 or the current out-of-limit state is incorrect, setting the field which is giving an alarm to be 1 or not, setting the field which is giving an alarm to be 0 or not, and generating an alarm event; sending a process alarm event to other processes for processing, and if an undetected effective analog measurement point exists in the analog measurement point information table, continuously checking the out-of-limit state of the next measurement point; otherwise, executing the measuring point alarm state judgment of the switching value;
if the judgment result is that the current measuring point is in a normal state, but the alarming field of the measuring point in the measuring point information table in the database is 1, setting the alarming field of the measuring point to be 0, generating an alarming resetting event, and sending the alarming resetting event to other processes for processing.
8. The method for generating the station alarm and reset information in the background of the decentralized control system according to claim 7, wherein the step of judging the station alarm state of the switching value according to the switching value real-time value and the alarm mode of the switching value in the real-time database of the upper computer comprises the following steps:
and judging the alarm state of the measuring point according to the real-time value and the alarm mode of the switch measuring point in the database:
if the real-time value field of the current switch measurement point in the database is 1 and the alarm mode field is 1 for alarm, or if the real-time value field of the current switch measurement point is 0 and the alarm mode field is 0 for alarm, generating an alarm event and sending the process alarm event to other processes for processing;
if the real-time value field of the current switch measurement point in the database is 1 and the alarm mode field is 0 for alarm, or the real-time value field of the current switch measurement point is 0 and the alarm mode field is 1 for alarm, generating an alarm resetting event and sending the process alarm resetting event to other processes for processing;
and if the analog quantity switch meter has an undetected effective switch measuring point, continuously checking the alarm state of the next measuring point, and otherwise, performing lower wheel background alarm detection.
9. The method for generating station alarm and reset information in the background of the decentralized control system according to claim 8, wherein the alarm event and the alarm reset event include event content and station information, and wherein: the alarm event content is that the analog quantity exceeds xx limit actions and comes from background detection or the switching value alarm action and comes from background detection, and xx represents an out-of-limit state; the content of the alarm resetting event is 'analog quantity alarm resetting from background detection' or 'switching value alarm resetting from background detection';
the station information includes station identification names and position information.
10. A system for generating measuring point alarm and reset information in a background of a decentralized control system is characterized by comprising the following steps:
the real-time database is used for establishing an information table comprising an analog measuring point and a switch measuring point;
judging the real-time value of the analog measuring point in the real-time database of the upper computer and the alarm out-of-limit threshold value of the measuring point to obtain an out-of-limit state result of the analog measuring point;
judging the measuring point alarm state of the switching value according to the switching value measuring point real-time value and the alarm mode in the upper computer real-time database;
and comparing the measured point alarm state results of the analog quantity and the switching value with the alarm state stored in the library to generate alarm or reset information.
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| CN113741378B (en) * | 2021-11-04 | 2022-03-15 | 西安热工研究院有限公司 | Fault analysis method and system for background abnormal point high-frequency acquisition of distributed control system |
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