Substation secondary device state monitoring method and system based on physical function topology

Abstract

The application discloses a kind of based on physical function topology's substation secondary device state monitoring method and system, the substation secondary device is hierarchized according to physical composition and is decomposed into equipment, board piece, device, functional module etc.object;Different functional modules are combined into functional object again according to the time sequence of function execution;The monitoring element of different object is extracted, and the alarm information of each object is established based on the logical relationship between elements, and the device physical function topology model is formed;Operation and maintenance monitoring system reads the physical function topology model of the equipment to be measured and real-time monitoring element data, generates alarm information based on alarm logic, realizes the internal state monitoring of secondary device;Through the method, the internal state of the substation secondary device can be monitored and fault or abnormal positioning is realized, and the convenience of equipment operation and maintenance is improved.

Description

TECHNICAL FIELD

[0001] The application belongs to the technical field of substation secondary device state monitoring, and particularly relates to a substation secondary device state monitoring method and system based on a physical function topology. BACKGROUND

[0002] In the field of power system operation and maintenance, substation secondary devices are core equipment for realizing grid monitoring, protection and control functions, and the reliability of their operation state is directly related to the safety and stability of the power grid. With the deepening of the construction of smart grids, higher requirements are put forward for the state perception and operation and maintenance management of secondary devices, and the industry generally expects to realize deep visualized monitoring of internal physical components and functional logic of secondary devices to improve fault early warning and disposal efficiency. Currently, this field is gradually transforming from the traditional periodic maintenance and after-maintenance mode to the predictive maintenance mode based on state monitoring.

[0003] In the prior art, the state monitoring of substation secondary devices is mainly realized by relying on a device information model complying with the DL / T860 standard. The model unifies modeling and organization of device functions and data through logical nodes, and classifies monitoring information into different logical nodes according to types. A monitoring system accesses model files and data interfaces provided by the device to obtain real-time information such as measurement values, state signals, alarm events, and the like, and performs state display and alarm prompting on this basis.

[0004] However, the above prior art has a most obvious shortcoming: the information model only focuses on logical description of device functions, lacks topological expression of internal physical composition of the device, and also fails to depict the timing execution relationship between functional modules. This results in that when the device abnormity or alarm occurs, the monitoring system cannot effectively trace the root cause of the alarm, and it is also difficult to quickly locate the specific fault physical component or functional link, which seriously restricts the depth of abnormality analysis and the efficiency of operation and maintenance defect elimination. SUMMARY

[0005] The purpose of the present application is to provide a substation secondary device state monitoring method and system based on a physical function topology, which realizes visualized monitoring of the internal state of the device and accurate positioning of the fault root by constructing a device model integrating physical composition and functional timing, and calculating alarm information based on real-time monitoring elements.

[0006] The substation secondary device state monitoring method of the present application comprises the following steps:

[0007] S1, constructing a secondary device physical function topology model: the secondary device is hierarchically decomposed into device DEVICE, board BOARD, component COMPONENT and function module MODULE objects according to physical composition, monitoring elements of various objects are analyzed and extracted, alarm information of each object is established based on the monitoring elements, and device physical topology is formed; the device function is decomposed into a plurality of independent sub-functions SUBFUNC, the function module group MODULES is constructed according to the execution time sequence, the alarm information of each SUBFUNC is established, and the device function topology is formed;

[0008] S2, the physical function topology model is downloaded to the monitored secondary device, the monitored secondary device analyzes the model, and real-time monitoring element data is collected, and the monitoring element data is sent according to the data subscription mode of the operation and maintenance monitoring system;

[0009] S3, the operation and maintenance monitoring system calls and analyzes the physical function topology model of the monitored secondary device after power-on, the device state display module generates a hierarchical device physical topology display interface according to the physical topology in the model, and generates a function display interface in which the function modules are connected in time sequence according to the function topology in the model; at the same time, real-time monitoring element data of the secondary device is obtained, alarm values are generated by combining the alarm information logic in the model, and the differences are displayed on the object interface.

[0010] The secondary device model is constructed by fusing physical structure and function time sequence, the hierarchical and time sequence modeling of the internal state of the device is realized, the model is downloaded to the device and real-time monitoring data is collected, the dynamic perception and data reporting of the device state are supported, the operation and maintenance system generates a visual interface of physical and function topology based on model analysis and real-time data, and the state difference display and accurate positioning of fault source are realized by combining the alarm logic, so that the transparency and operation accuracy of the secondary device state monitoring of the substation are comprehensively improved.

[0011] Preferably, in step S1, the DEVICE object includes device level parameters Pd, state information Xd, device level alarm information Ad, connection relationship LINKS between MODULES and at least one BOARD object;

[0012] The BOARD object includes board parameters Pb, state information Xb, board alarm information Ab and at least one COMPONENT object;

[0013] The COMPONENT object includes component parameters Pc, state information Xc, component alarm information Ac and a plurality of MODULE objects;

[0014] The MODULE object includes function module parameters Pm, state information Xm, function module alarm information Am and input and output terminals Terminal.

[0015] By defining a hierarchical and complete attribute object model, the secondary device is gradually decomposed from physical equipment to functional modules, so that each level has parameters, states and alarm information, thereby constructing a precise data model that deeply penetrates the internal structure and functional logic of the device, laying a solid data foundation for realizing transparent monitoring, fine diagnosis and rapid and accurate positioning of faults of the device state.

[0016] Preferably, the alarm information includes an expression Exp, an impact description EffectDesc and an operation suggestion Suggestion, wherein Exp is a logical operation expression composed of monitoring elements and other alarm information:

[0017] Exp(A)=f({P i |i<m},{X j |j<n},{A k |k<l})

[0018] Wherein, A represents an alarm signal, Exp is a logical expression, Exp(A) represents a logical expression generated by a certain alarm signal, f is a logical operation formula containing and, or, not, comparison and arithmetic operation, and the calculation result is 0 or 1; P i is a parameter, X j is state information, and A k is other alarm information; m, n and l respectively represent the upper limit of the number of parameters, state signals and other alarm signals;

[0019] An alarm information has and only has one Exp; EffectDesc is used to describe the impact of the alarm information being 1 on the device function; Suggestion is used to describe the operation mode to solve the problem when the alarm information is 1.

[0020] By defining an alarm information model composed of a logical expression, an impact description and an operation suggestion, discrete monitoring data is converted into an alarm signal with clear cause and effect relationship; wherein the logical expression realizes flexible combination and comprehensive judgment of cross-level monitoring elements, and the impact description and operation suggestion directly associate alarm root cause, functional impact and processing measures, thereby realizing accurate assessment of fault impact and intelligent guidance of operation and maintenance response while generating alarms, greatly improving the automation level and processing efficiency of fault analysis.

[0021] Preferably, in step S1, the MODULES are composed of a plurality of functional module indexes MDLIDX, each MDLIDX including a functional module name name and a level level, wherein name is a global index of MODULE, and level represents the execution time sequence of MODULE in SUBFUNC.

[0022] By organizing the function modules with time level and global index, the abstract function of the device is decomposed into a sequence of specific and orderly executed function modules, thus converting the static function topology into dynamic and visualized execution logic, which provides core support for precise trace of function flow, time sequencing monitoring of running state, and rapid positioning of faults on function link.

[0023] Preferably, in step S2, after the monitored secondary device parses the physical function topology model, a list of all parameters and state information is generated, real-time values are periodically collected and records containing data name and data value are generated; for state quantity data, in addition to recording real-time values, change event records are generated when the value changes; for analog quantity data, only real-time values are recorded; for control commands, complete control process and results are recorded.

[0024] By parsing the model to generate a complete data list, and formulating differentiated real-time collection and event triggered record strategies according to the characteristics of different data types (state quantity, analog quantity, control command), the dynamic running state and operation history of the device are comprehensively and accurately captured, thus providing a complete and timely data basis for the upper system, effectively supporting advanced applications such as state evaluation, fault analysis and operation traceback.

[0025] Preferably, in step S3, the alarm value is generated in combination with the alarm information logic in the model, including:

[0026] S31, parse the physical function topology model to extract all alarm information to form a list List;

[0027] S32, generate a machine computable logical expression according to the expression Exp of the alarm information Ai;

[0028] S33, query whether the operand of the logical expression contains other alarm information values Aj;

[0029] S34, if Aj is contained, search for Aj in List and replace Aj with the Exp of Aj, regenerate the Exp of Ai, and return to S32;

[0030] S35, if the operand does not contain other alarm information values, bring the real-time parameter and monitored element value into the logical expression to calculate the value of the alarm information Ai.

[0031] The alarm computing mechanism expands the nested alarm logic with existing dependency layer by layer through recursive analysis and substitution, and finally converts it into an atomic expression directly operated by the basic monitoring data, thereby ensuring that the alarm information can be uniformly and accurately calculated based on the real-time parameters at the bottom layer, eliminating logical ambiguity and delay caused by alarm correlation from the root, and realizing rapid, accurate and joint generation of the whole station alarm signal.

[0032] In a second aspect, the substation secondary device state monitoring system comprises:

[0033] A model construction module for constructing a physical function topology model of the secondary device;

[0034] A device monitoring module deployed in the monitored secondary device for analyzing the model, collecting monitoring element data and sending;

[0035] An operation and maintenance monitoring module for analyzing the model, generating a display interface, calculating alarm information values and visualizing display.

[0036] The system realizes full-process closed-loop management from model definition, data collection to state calculation and visualized display by the collaborative work of the three modules of model construction, device monitoring and operation and maintenance monitoring, thereby constructing a monitoring system with highly consistent information and accurate diagnosis logic, and finally providing transparent monitoring and intelligent diagnosis capabilities from physical structure to functional logic for operation and maintenance personnel.

[0037] Preferably, the model construction module constructs the physical function topology model in XML file format, including the XML element structures of DEVICE, BOARD, COMPONENT, MODULE and SUBFUNC.

[0038] By using the standardized XML file format to define the physical function topology model, the complex hierarchical objects and associated relationships in the model can be described and transmitted in a universal and structured manner, thereby ensuring the consistency, interoperability and scalability of the device model information exchange and analysis between different system modules.

[0039] Preferably, the device monitoring module carries the monitoring data in cime file format and communicates with the operation and maintenance monitoring module through DL / T860 file service.

[0040] By encapsulating the monitoring data by using a standardized cime file format and transmitting based on a file service of the DL / T860 protocol, efficient, reliable and standardized interaction of massive real-time monitoring data between heterogeneous systems is realized, a complete and consistent data source is provided for the operation and maintenance monitoring module, and a solid foundation for interconnection and data sharing of the entire state monitoring system is laid.

[0041] Preferably, the display interface of the operation and maintenance monitoring module comprises:

[0042] a physical topology display interface that displays DEVICE, BOARD, COMPONENT and MODULE objects in a hierarchical structure;

[0043] a function display interface that displays a SUBFUNC execution flow in a time-sequenced function module concatenation manner;

[0044] The alarm state is displayed by color difference, and the impact description and operation suggestion are displayed simultaneously when an alarm occurs.

[0045] The display interface visually presents the internal structure and running logic of the device through the hierarchical physical topology and time-sequenced function flow double views, and comprehensively displays the alarms in combination with color difference, impact description and operation suggestion, so that the operation and maintenance personnel can intuitively grasp the overall state of the device, quickly locate the fault root cause and directly obtain processing guidance, thereby greatly improving the transparency of state monitoring and the precision and efficiency of operation and maintenance operations.

[0046] Advantages: Compared with the prior art, the present application has the following remarkable advantages: 1. By constructing a device model that integrates physical composition and function timing, and calculating alarm information based on real-time monitoring elements, the internal hierarchical physical structure and time-sequenced function flow of the device can be intuitively displayed, so that the fault root cause can be quickly located; 2. By hierarchically decomposing the secondary device into equipment, board, component and function module objects, and collecting monitoring element data of all objects, deep state monitoring from macro to micro is realized, covering the running state of the device throughout its life cycle; 3. By real-time calculation of alarm values based on alarm information logic expressions, in combination with parameters, state information and other alarm information, intelligent reasoning and abnormal tracing of alarms are realized, overcoming the limitations of traditional fixed alarm signals; 4. By using standardized model file formats and data communication protocols, model parsing and data exchange are facilitated, supporting the operation and maintenance monitoring system to quickly generate a display interface and real-time update alarm states, thereby improving the automation and response speed of operation and maintenance. BRIEF DESCRIPTION OF DRAWINGS

[0047] Figure 1 is a method flowchart of the present application;

[0048] Figure 2 is a device alarm information value calculation flowchart of the present application. DETAILED DESCRIPTION

[0049] The technical solutions of the present application will be further described below with reference to the accompanying drawings.

[0050] The embodiment of the present application provides a substation secondary device state monitoring method based on a physical function topology, as shown in the following formula: Figure 1 Taking a substation digital measurement and control device as an example, the substation secondary device state monitoring method and system based on the physical function topology are as follows:

[0051] Step one: constructing a physical function topology model of the measurement and control device based on an XML file format. The measurement and control device is hierarchically constructed into DEVICE, BOARD, COMPONENT, MODULE and other XML elements according to physical composition.

[0052] There is only one DEVICE element in the model, which is used to carry device-level information. The DEVICE element includes a plurality of device parameter (PARA) elements, a plurality of device status information (STATUS) elements, a plurality of device alarm information (ALM) elements, LINKS elements between MODULEs, and a plurality of BOARD elements. The LINKS element is composed of a plurality of LINK elements, and one LINK uniquely describes a directed connection, which is composed of a source end (SRC) and a terminal end (DST). The SRC and the DST are both terminals of the MODULE.

[0053] One BOARD element maps one actual measurement and control device board, such as a management board, which includes a plurality of board parameter (PARA) elements, a plurality of board status information (STATUS) elements, a plurality of board alarm information (ALM) elements, and a plurality of COMPONENT elements.

[0054] One COMPONENT element maps a device on an actual board, such as a CPU, which includes a device parameter (PARA) element, a device status information (STATUS) element, a device alarm information (ALM) element, and a plurality of MODULE elements.

[0055] One MODULE element maps a relatively independent function module program, such as a sampling value processing module, which includes a plurality of function module parameter (PARA) elements, a plurality of function module status information (STATUS) elements, a plurality of function module alarm information (ALM) elements, and a plurality of input and output terminals (Terminal).

[0056] An alarm information (ALM) element contains an Exp element, an EffectDesc element and a Suggestion element. Exp is a logical operation expression composed of monitoring elements and other alarm information, as shown in the following formula:

[0057] Exp(A) = f({Pi|i<m}, {Xj|j<n}, {Ak|k<l}), where A represents an alarm signal, Exp is a logical expression, Exp(A) represents a logical expression generated by a certain alarm signal, f is a logical operation expression containing and, or, not, comparison and arithmetic operation, and the calculation result is 0 or 1; P i is a parameter, X j is state information, and A k is other alarm information; m, n, and l respectively represent the upper limit of the number of parameters, state signals, and other alarm signals. The alarm information value is determined by Exp calculation; the EffectDesc element is a string, which describes the impact of the alarm on the device function when the alarm information value is 1 (i.e. the Exp operation value is 1); the Suggestion element is a string, which describes how to operate to further understand or solve the problem when the alarm information value is 1.

[0058] The elements of DEVICE, BOARD, COMPONENT, and MODULE constructed in the physical function topology model of the TT&C device are shown in Table 1. Taking the device as a whole, the management module, its CPU device, and the functional module as examples, the extracted parameters and state information are shown in Table 2. The connection relationship between some MODULEs is shown in Table 3. Some alarm information is shown in Table 4.

[0059] Table 1 Object table of TT&C device

[0060]

[0061] Table 2 Monitoring element table of TT&C device

[0062]

[0063] Table 3 Association relationship table between functional modules of TT&C device

[0064]

[0065] Table 4 Part of alarm information table of TT&C device

[0066]

[0067] The elements of meas, bin, ctrl and sycn are constructed, respectively mapping the telemetry, telesignaling, remote control and synchronization of the measuring and controlling device SUBFUNC, all MODULES required for execution of each SUBFUNC are selected from Table 1, the functional module group (MODULES) element is constructed according to the execution time sequence, and the device function topology is formed. The MODULES element is composed of several functional module indexes (MDLIDX) elements. One MDLIDX element contains a functional module name (name) element and a level (level) element. The name is the global index of the MODULE, and the level is the execution time sequence of the MODULE in the SUBFUNC. When the levels of two MDLIDXs are the same, it means that the two MODULES are executed simultaneously in parallel. Taking the telemetry function as an example, the constructed MODULES are shown in Table 5:

[0068] Table 5 Measuring and controlling device telemetry function module group table

[0069]

[0070] Step two: download the physical function topology XML model to the measuring and controlling device. After the measuring and controlling device parses the model, a list of all parameter and state information is generated, the real-time values of the data in the list are periodically collected, and a record containing the data name and data value is generated, wherein the data name is the global index of the parameter or state information in the model. In this example, the measuring and controlling device uses a cime file to carry data. For state variables, in addition to recording real-time values, change event records are generated when the values change; for analog data, only real-time values are recorded; for control commands, the complete control process and results are recorded. After connecting with the operation and maintenance monitoring system, the data file is sent in response to the calling file command of the operation and maintenance monitoring system. The data information entry content in the file is shown in Table 6.

[0071] Table 6 Measuring and controlling device monitoring data file content

[0072]

[0073] Among them, the category uniquely identifies the content of this data, 1 represents a displacement telesignaling, 2 represents a remote control operation, 3 represents a periodic full data upload, 4 represents an analog trigger telesignaling, and 5 represents a start-up record.

[0074] Step three: the operation and maintenance monitoring system is powered on, the physical function topology model of the monitored measuring and controlling device is called and parsed using the file service of DL / T860, the device state display module generates a hierarchical DEVICE, BOARD, COMPONENT and MODULE object composed of device physical topology display interface according to the model, and generates a functional display interface of a time-sequenced functional module string according to the functional topology in the model.

[0075] The system periodically calls the monitoring data cime file of the measurement and control device, parses the data in the file, and displays each object monitoring element data on the physical topology display interface and the function display interface.

[0076] The alarm information of each object in the model is generated by the real-time monitoring data value combined with the Exp of the alarm information, and the calculation process is as shown in the following Figure 2

[0077] In the first step, all alarm information in the measurement and control device model is extracted to form a list List.

[0078] In the second step, the logic formula that can be used for machine calculation is generated according to the Exp (Ai) of the alarm information.

[0079] In the third step, it is inquired whether other alarm information values Aj are contained in the operands of the logic formula.

[0080] In the fourth step, if the operands of the logic formula contain Aj, Aj is searched in List, Exp (Aj) is used to replace Aj, Exp (Ai) is regenerated, and the second step is returned.

[0081] In the fifth step, if the operands of the logic formula do not contain other alarm information values, only contain parameters and state information, the parameters and state information values in the latest cime file are brought into the logic formula, and the value of the alarm information Ai is calculated.

[0082] After the alarm value is calculated, the object interface is differentiated and displayed, when the value is 0, the object is displayed in green, when the value is 1, the object is displayed in red, and the EffectDesc and Suggestion of the alarm information are displayed, so that the running personnel can quickly locate the cause of the device abnormal alarm, the specific fault device, and how to quickly solve the fault.

[0083] Based on the similar inventive concept, the embodiment of the application also provides a substation secondary device state monitoring system corresponding to the substation secondary device state monitoring method, comprising:

[0084] A model construction module is used to construct a secondary device physical function topology model.

[0085] A device monitoring module is deployed in the monitored secondary device, and is used to parse the model, collect monitoring element data, and send.

[0086] An operation and maintenance monitoring module is used to parse the model, generate a display interface, calculate an alarm information value, and perform visual display.

[0087] ​The application is characterized in that, by introducing a device mechanism model, objects such as "equipment", "plate", "device" and "functional module" are displayed from a physical perspective in a hierarchical manner, a complete process of equipment function execution is displayed through time sequence connection between the "functional modules", and deep state monitoring of the equipment is realized by collecting monitoring element data of all objects. The traditional mode of directly transmitting an alarm signal by the measured equipment is changed, a logic expression of alarm information based on the monitoring elements is constructed in the mechanism model, real-time monitoring element data is used to calculate the alarm state of the equipment in real time, and deep monitoring and fault tracing of the secondary device physical device and the functional state are realized.

Claims

1. A substation secondary device state monitoring method based on physical function topology, characterized in that, The method comprises the following steps: S1, constructing a secondary device physical function topology model: the secondary device is hierarchically decomposed into device DEVICE, board BOARD, component COMPONENT and function module MODULE objects according to physical composition, monitoring elements of various objects are analyzed and extracted, alarm information of each object is established based on the monitoring elements, and device physical topology is formed; the device function is decomposed into a plurality of independent sub-functions SUBFUNC, the function module group MODULES is constructed according to the execution sequence, and alarm information is established for each SUBFUNC, and device function topology is formed; The object of the DEVICE comprises device-level parameters Pd, state information Xd, device-level alarm information Ad, connection relationship LINKS between MODULES and at least one BOARD object; the object of the BOARD comprises board parameters Pb, state information Xb, board alarm information Ab and at least one COMPONENT object; the object of the COMPONENT comprises component parameters Pc, state information Xc, component alarm information Ac and a plurality of MODULE objects; the MODULE object comprises function module parameters Pm, state information Xm, function module alarm information Am and input and output terminals Terminal; The alarm information is any alarm information associated with the device DEVICE, the board BOARD, the component COMPONENT, the function module MODULE or the sub-function SUBFUNC, and each alarm information comprises an expression Exp, an influence description EffectDesc and an operation suggestion Suggestion, wherein the Exp is a logical operation expression composed of monitoring elements and other alarm information: ; wherein A represents an alarm signal, Exp is a logic expression, Exp(A) represents a logic expression generated by a certain alarm signal, f is a logic operation expression containing and, or, not, comparison and arithmetic operation, and the calculation result is 0 or 1; P i is a parameter, X j is state information, A k is other alarm information; m, n, and l respectively represent the upper limit of the number of parameters, state signals, and other alarm signals. Each alarm information has only one Exp; the EffectDesc is used to describe the influence of the alarm information on the device function when the alarm information is 1; the Suggestion is used to describe the operation mode for solving the problem when the alarm information is 1; The MODULES are composed of a plurality of function module indexes MDLIDX, each MDLIDX comprises a function module name name and a level level, wherein the name is a global index of the MODULE, and the level represents the execution sequence of the MODULE in the SUBFUNC; S2, downloading the physical function topology model to the monitored secondary device, the monitored secondary device analyzes the model, collects monitoring element data in real time, and sends the monitoring element data according to the data subscription mode of the operation and maintenance monitoring system; After the monitored secondary device analyzes the model, a list of all parameters and state information is generated, real-time values are collected periodically, and records containing data names and data values are generated; for state quantity data, in addition to recording real-time values, change event records are generated when the values change; for analog quantity data, only real-time values are recorded; for control commands, complete control process and results are recorded; S3, the operation and maintenance monitoring system is powered on to call and analyze the physical function topology model of the monitored secondary device, and the device state display module generates a hierarchical device physical topology display interface according to the physical topology in the model, and generates a function display interface in which time-sequenced function modules are concatenated according to the function topology in the model; at the same time, the monitoring element data of the secondary device is acquired in real time, the alarm value is generated in combination with the alarm information logic in the model, and the alarm value is displayed differently on the object interface; The alarm value generated in combination with the alarm information logic in the model comprises: S31, analyze the physical function topology model, extract all alarm information to form a list List; S32, generate a machine computable logic expression according to the expression Exp of the alarm information Ai; S33, query whether the operand of the logic expression contains other alarm information values Aj; S34, if Aj is contained, search for Aj in List and replace Aj with the Exp of Aj, regenerate the Exp of Ai, and return to S32; S35, if the operand does not contain other alarm information values, bring the real-time parameters and monitoring element values into the logic expression to calculate the value of the alarm information Ai.

2. A substation secondary device state monitoring system based on physical function topology for implementing the method of claim 1, characterized by Comprise: A model construction module for constructing a physical function topology model of a secondary device; A device monitoring module deployed on a monitored secondary device for analyzing the model, collecting monitoring element data, and sending; An operation and maintenance monitoring module for analyzing the model, generating a display interface, calculating an alarm information value, and visualizing the display.

3. The system of claim 2, wherein, The model construction module constructs the physical function topology model in XML file format, including the XML element structures of DEVICE, BOARD, COMPONENT, MODULE, and SUBFUNC.

4. The system of claim 2, wherein, The device monitoring module carries monitoring data in cime file format and communicates data with the operation and maintenance monitoring module through a DL / T860 file service.

5. The system of claim 2, wherein, The display interface of the operation and maintenance monitoring module comprises: A physical topology display interface that displays DEVICE, BOARD, COMPONENT, and MODULE objects in a hierarchical structure; A function display interface that displays a SUBFUNC execution flow in a time-sequenced function module concatenation manner; Wherein, the alarm state is displayed by color difference, and the impact description and operation suggestion are displayed simultaneously when an alarm occurs.

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