CN-121977654-A - Integrated safety monitoring method and equipment for gas pressure regulating cabinet

CN121977654ACN 121977654 ACN121977654 ACN 121977654ACN-121977654-A

Abstract

The invention provides a method and equipment for integrally monitoring safety of a gas pressure regulating cabinet, and relates to the technical field of safety monitoring of gas pressure regulating operation. The method comprises the steps of identifying pressure regulating operation conditions according to pressure regulating requirements in the operation process of a gas pressure regulating cabinet, limiting the target state range of outlet pressure and flow which should be met in the pressure regulating process, determining the target pressure regulating behavior of a valve before executing pressure regulating action, determining the synchronous change index of outlet pressure and flow in the pressure regulating process according to the change trend between the outlet pressure and flow change in the pressure regulating process, establishing the constraint relation which should be met by the outlet pressure and flow change under the target pressure regulating behavior based on the synchronous change index of the outlet pressure and flow, acquiring the change of the outlet pressure and the flow when the pressure regulating process is finished, determining the pressure and flow deviation relative to the constraint relation, judging the pressure regulating process to be in an abnormal operation state when any deviation exceeds the corresponding allowable deviation threshold, triggering abnormal early warning and recording abnormal operation events.

Inventors

TIAN LIN
GU LEI
YU SHUNLIN

Assignees

天津圆通燃气有限公司

Dates

Publication Date: 20260505
Application Date: 20260325

Claims (9)

1. The integrated safety monitoring method of the gas pressure regulating cabinet is characterized by comprising the following steps of, In the operation process of the gas pressure regulating cabinet, a pressure regulating operation working condition is identified according to the current pressure regulating requirement, and the target state range of the outlet pressure and the flow which should be met in the pressure regulating operation working condition in the pressure regulating process is limited, wherein the pressure regulating process is a process from the start of executing the pressure regulating action to the recovery of the outlet pressure and the flow to the stable state; before the gas pressure regulating cabinet executes pressure regulating action, determining target pressure regulating action of a valve for directly influencing outlet pressure and outlet flow change according to current pressure regulating requirements; Determining an outlet pressure-flow synchronous change index of the pressure regulating process according to a change trend between outlet pressure change and corresponding outlet flow change of the pressure regulating process in the outlet pressure and flow target state range; Correspondingly associating an outlet pressure-flow synchronous change index in the pressure regulating process with the target pressure regulating behavior, and establishing a constraint relation which is met by the outlet pressure and outlet flow change under the target pressure regulating behavior; Acquiring outlet pressure variation and outlet flow variation at the end of the pressure regulating process, comparing the outlet pressure variation with a constraint relation which is met by outlet pressure and outlet flow variation under the target pressure regulating action, and determining pressure deviation and flow deviation relative to the corresponding constraint relation; Comparing the pressure deviation amount and the flow deviation amount with corresponding allowable deviation thresholds, and when any deviation amount exceeds the corresponding allowable deviation thresholds, judging that the pressure regulating process of the gas pressure regulating cabinet is in an abnormal operation state, triggering abnormal early warning and recording an abnormal operation event.
2. The integrated safety monitoring method of a gas regulator cabinet according to claim 1, wherein the identifying the pressure regulating operation condition according to the current pressure regulating requirement and defining the outlet pressure and flow target state range that should be satisfied by the pressure regulating process under the pressure regulating operation condition specifically comprises: According to the current pressure regulating requirement, obtaining target outlet pressure and target outlet flow, and reading the designed rated flow of the gas pressure regulating cabinet; A pressure regulating operation working condition library is established in advance, and the pressure regulating operation working condition library is divided according to the pressure regulating load level, wherein the pressure regulating operation working condition library comprises a low-flow pressure regulating working condition, a medium-flow pressure regulating working condition and a high-flow pressure regulating working condition; Judging the voltage regulating operation condition corresponding to the current voltage regulating requirement according to the ratio of the target outlet flow to the designed rated flow; Based on the determined pressure-regulating operation working condition, reading a corresponding outlet pressure and flow target state range from a pressure-regulating operation working condition library; after the outlet pressure and the flow target state range are limited, the current outlet pressure before the pressure regulating action is executed is obtained, whether the current outlet pressure falls into the outlet pressure target state range or not is judged, and the outlet pressure and the flow target state range which are satisfied are taken as the outlet pressure and the flow target state range under the condition that the current outlet pressure falls into the pressure target state range.
3. The integrated safety monitoring method of a gas regulator cabinet according to claim 2, wherein the determining the target pressure regulating behavior of the valve for directly affecting the outlet pressure and the outlet flow variation according to the current pressure regulating demand comprises, According to the current pressure regulating requirement, determining a valve selected to execute pressure regulating action in the pressure regulating process, and determining the valve selected to execute the pressure regulating action as a valve for directly influencing outlet pressure and outlet flow change; Determining a target pressure regulating behavior corresponding to each valve for directly influencing the outlet pressure and outlet flow change in a pressure regulating process, wherein the target pressure regulating behavior comprises opening, closing, opening increase or opening decrease; valves each for directly affecting outlet pressure and outlet flow variation and their corresponding target pressure regulation behavior are recorded.
4. The integrated safety monitoring method of a gas pressure regulating cabinet according to claim 3, wherein the determining the synchronous change index of the outlet pressure-flow rate in the pressure regulating process according to the change trend between the outlet pressure change and the corresponding outlet flow rate change in the pressure regulating process specifically comprises, Continuously acquiring the current outlet pressure and the current outlet flow in the pressure regulating process according to a set sampling time interval, and calculating the outlet pressure variation and the outlet flow variation of each acquisition point; judging the direction consistency of the outlet pressure variation and the outlet flow variation point by point based on the outlet pressure variation and the outlet flow variation of the acquisition point, calculating the pressure-flow consistency ratio of the pressure regulating process, and judging that the outlet pressure variation and the outlet flow variation of the pressure regulating process are in a synchronous variation state when the pressure-flow consistency ratio of the pressure regulating process is greater than or equal to a preset consistency judgment threshold value; When the outlet pressure-flow rate in the pressure regulating process is judged to be in a synchronous change state, based on sampling points with the same direction of the outlet pressure change amount and the outlet flow rate change amount in the pressure regulating process, calculating the average change rate of the outlet pressure change amount, the average change rate of the outlet flow rate change amount, the maximum change amplitude of the outlet pressure change amount and the maximum change amplitude of the outlet flow rate change amount as outlet pressure-flow rate synchronous change indexes in the pressure regulating process.
5. The integrated safety monitoring method of a gas regulator cabinet according to claim 4, wherein the calculation of the average rate of change of the outlet pressure variation and the average rate of change of the outlet flow variation comprises, Calculating outlet pressure variation and outlet flow variation between adjacent sampling points based on the outlet pressure and outlet flow of each sampling point; Calculating the outlet pressure variation and the outlet flow variation between adjacent sampling points at sampling time intervals corresponding to the outlet pressure variation and the outlet flow variation between the adjacent sampling points to obtain the outlet pressure variation rate and the outlet flow variation rate between the adjacent sampling points; And carrying out average operation on the outlet pressure change rate and the outlet flow change rate between every two adjacent sampling points to respectively obtain the average change rate of the outlet pressure change quantity and the average change rate of the outlet flow change quantity in the pressure regulating process.
6. The integrated safety monitoring method of a gas regulator cabinet according to claim 5, wherein the establishing the constraint relation that the outlet pressure and the flow change should satisfy under the target pressure regulating action includes, Calculating a change interval to be reached by the outlet pressure of each valve for each valve selected to execute the pressure regulating action based on the target pressure regulating action of the valve according to the average change rate and the maximum change amplitude of the outlet pressure change quantity in the pressure regulating process; calculating a change interval to be reached by the outlet flow of each valve according to the average change rate and the maximum change amplitude of the outlet flow change amount in the pressure regulating process based on the target pressure regulating behavior of the valve aiming at each valve selected to execute the pressure regulating action; and respectively adding the change interval which is to be reached by the outlet pressure and the change interval which is to be reached by the outlet flow and corresponds to each valve selected to execute the pressure regulating action, so as to obtain the constraint relation which is to be satisfied by the outlet pressure change and the outlet flow change under the target pressure regulating action.
7. The method of claim 6, wherein calculating a variation interval to which the outlet pressure of the valve selected to perform the pressure regulating action should be made comprises, Response time to completion of target pressure regulating behavior at valve selected to perform pressure regulating action In, based on the average rate of change of the outlet pressure variation Predicting the outlet pressure variation generated in the valve action stage to obtain the predicted pressure variation ; Judging the predicted pressure change Maximum variation amplitude from outlet pressure variation When the size of (a) is related to In the case that the type of the target pressure regulating action is opening or opening degree is increased, determining the lower limit of the outlet pressure change of the valve Upper limit of outlet pressure variation For the case that the type of the target pressure regulating behavior is closing or opening decreasing, determining the outlet pressure variation lower limit of the valve Upper limit of outlet pressure variation When (1) In the case that the type of the target pressure regulating action is opening or opening degree is increased, determining the lower limit of the outlet pressure change of the valve Upper limit of outlet pressure variation For the case that the type of the target pressure regulating behavior is closing or opening decreasing, determining the outlet pressure variation lower limit of the valve Upper limit of outlet pressure variation To perform the current outlet pressure before the pressure regulating action, , In order for the voltage regulating action to be completed with a time stamp, The pressure regulating process is started with a time stamp, The outlet pressure variation corresponding to the minimum opening variation of the valve; Determining a change interval to be reached by the outlet pressure of the valve selected to perform the pressure regulating action as 。
8. The method of claim 7, wherein calculating a variation interval to be reached by the outlet flow of the valve selected to perform the pressure regulating action comprises, Response time to completion of target pressure regulating behavior at valve selected to perform pressure regulating action In, based on the average rate of change of the outlet flow rate variation Predicting the outlet flow variation generated in the valve action stage to obtain the predicted flow variation ; Judging the predicted flow rate variation Maximum variation amplitude from outlet flow variation When the size of (a) is related to When the type of the target pressure regulating action is opening or opening degree is increased, determining the lower limit of the outlet flow change of the valve Upper limit of outlet flow variation For the case that the type of the target pressure regulating action is closing or opening degree is reduced, determining the lower limit of the outlet flow change of the valve Upper limit of outlet flow variation When (1) When the type of the target pressure regulating action is opening or opening degree is increased, determining the lower limit of the outlet flow change of the valve Upper limit of outlet flow variation For the case that the type of the target pressure regulating action is closing or opening degree is reduced, determining the lower limit of the outlet flow change of the valve Upper limit of outlet flow variation , wherein, To perform the current outlet flow before the pressure regulating action, The outlet flow variable quantity corresponding to the minimum opening variable quantity of the valve; Determining a change interval to be reached by the outlet flow of the valve selected to perform the pressure regulating action as 。
9. The integrated safety monitoring equipment of the gas pressure regulating cabinet is characterized by comprising, At least one processor; and a memory communicatively coupled to the at least one processor; Wherein the memory stores instructions executable by the at least one processor to enable the at least one processor to perform the gas regulator integrated safety monitoring method of any one of claims 1-8.

Description

Integrated safety monitoring method and equipment for gas pressure regulating cabinet Technical Field The invention relates to the technical field of safety monitoring of gas pressure regulating operation, in particular to a method and equipment for monitoring safety of a gas pressure regulating cabinet. Background The gas regulator cubicle is widely applied to urban gas transmission and distribution systems and is used for regulating the pressure and flow of gas under different working conditions so as to meet the gas demand of downstream users. In the actual operation process, the gas pressure regulating cabinet needs to frequently execute pressure regulating actions, the pressure regulating process is usually completed by a plurality of valves in a coordinated manner, and the opening, closing or opening adjustment of different valves directly influences the change process of outlet pressure and outlet flow. In the operation process of the existing gas pressure regulating cabinet, the pressure regulating safety monitoring generally takes the outlet pressure value or the outlet flow value after the pressure regulating action is taken as a judging basis, namely, after the pressure regulating is completed, whether the outlet pressure or the outlet flow falls into a preset safety range is judged. The monitoring mode focuses on the final result state of the voltage regulating action, and does not carry out procedural constraint on the complete execution process of the single voltage regulating action. However, in actual operation, the pressure regulating action is a process of executing pressure regulating action by the valve and causing continuous variation of the outlet pressure and the outlet flow, and under different pressure regulating requirements, the corresponding pressure regulating action of the valve is different, and the pressure variation amplitude, the flow variation amplitude and the variation relation between the two caused by the pressure regulating action should also have definite target characteristics. In the prior art, the corresponding relation between the change process of the outlet pressure and the outlet flow in the pressure regulating process and the determined target pressure regulating behavior of the valve before pressure regulation is not established, and the constraint description of whether the pressure and flow change in the pressure regulating process accords with the target pressure regulating behavior is lacked. In the pressure regulating scene of multiple valves, the superposition of the pressure regulating behaviors of the valves acts on the change process of the outlet pressure and the outlet flow together, the prior art generally judges the whole pressure or flow result only after the pressure regulating is finished, and the change interval which is required to be met by the whole pressure change and the flow change under the target pressure regulating behavior of each valve in the pressure regulating process is not limited, so that when abnormal change occurs in the pressure regulating process, whether the change belongs to the normal response under the target pressure regulating behavior or not is difficult to distinguish, or unexpected change is caused by the deviation of the valve execution or the abnormality of the pressure regulating process, thereby influencing the accuracy and timeliness of the pressure regulating operation safety monitoring. Therefore, the existing safety monitoring technology of the gas pressure regulating cabinet still has defects in the aspects of monitoring fineness in the pressure regulating process, pressure regulating behavior constraint expression and abnormal identification in the pressure regulating process, and is difficult to meet the actual requirements of online, safe and quantifiable monitoring on the pressure regulating process. Disclosure of Invention Aiming at the problems, the invention provides an integrated safety monitoring method and equipment for a gas pressure regulating cabinet, which are used for realizing safety monitoring and abnormal identification of the operation state of the pressure regulating process by identifying the pressure regulating operation condition, limiting the target state range of the outlet pressure and the flow, constructing the constraint relation between the outlet pressure and the flow under the target pressure regulating action, and comparing and judging based on the deviation condition of the outlet pressure variation and the outlet flow variation when the pressure regulating process is finished. In order to achieve the above object, in a first aspect, the present invention provides an integrated safety monitoring method for a gas regulator cubicle, comprising the following steps, In the operation process of the gas pressure regulating cabinet, a pressure regulating operation working condition is identified according to the current pressure regulating requirement, and the target state range