CN104753734B - A method for automatically diagnosing remote signaling data transmission faults in EMS systems of power grids - Google Patents

Abstract

The invention discloses a method for automatically diagnosing the transmission failure of remote signaling and displacement data in the EMS system of a power grid. By monitoring various protection/measurement and control IEDs, telecontrol devices, switches and pre-communication devices of the main station in real time, After the displacement of the remote signaling data value is detected, the remote signaling omission and false positive detection process is triggered to detect whether the remote signaling data M2, The remote signaling data M3 on the switch side and the remote signaling data M4 on the front communication device side of the main station, and judge whether the values of M1, M2, M3, and M4 are the same; generate the remote signaling omission and false alarm of the corresponding equipment according to the monitoring results; thus It can detect false positives and false negatives of remote signaling data in the EMS system at the first time, and can automatically and accurately locate false positives or false negatives nodes. While ensuring the accuracy of measurement information transmission in the power grid EMS system, it greatly reduces the operator burden.

Description

A method for automatically diagnosing remote signaling data transmission faults in EMS systems of power grids

technical field

The invention relates to the field of industrial internet of things, in particular to a power system fault diagnosis technology.

Background technique

As the power grid structure becomes more and more complex, the capacity of the power grid continues to expand, and the amount of information that needs to be transmitted in real time increases exponentially. high demands. In order to ensure the normal operation of the SAS system and EMS system, perfect, safe and correct automatic scheduling is essential.

In the field of dispatch automation system communication, information exchange is carried out between systems or devices through communication protocols, which are the basis for the realization of system functions. Due to the communication channel or equipment mistakenly sending data, in the dispatching automation system, remote signal false positives, missed reports, remote control cannot be executed or executed incorrectly, and telemetry jumps occur from time to time, which interferes with the normal operation of the entire dispatching automation system. Especially when these situations occur in remote or local automatic closed-loop control systems such as automatic reactive voltage control (AVQC) and automatic generation control (AGC), the severity is more prominent. In actual operation, the staff generally understand the current working status of the system through the man-machine interface, and only the information provided by the system can be viewed. When automatic information is found to be abnormal, due to the lack of effective monitoring techniques, failures can often only be analyzed based on experience, which is blind and affects troubleshooting. In order to find out the cause of the abnormality, technicians need to carefully check each link and restore the truth from the information provided by the equipment or system. In this case, the situation that occurred during the operation of the system needs to be strictly recorded. For the binary data transmitted on the communication line such as the communication protocol, it should also be able to record and analyze, so as to make judgments when needed in the future. Although the power monitoring systems or equipment provided by many system manufacturers can record the operating conditions of the power system and operations during operation, such as various power protection devices, measurement and control equipment, and fault recorders, etc., the integrated A unified information application system for monitoring and early warning of communication networks based on a modern information integration platform has not yet matured.

The communication network diagram of the existing energy management EMS system and substation automation system is shown in Figure 1, including two parts: the master station side and the plant station side. The master station side is composed of multiple workbenches and front-end communication devices (each Generally connected through the intranet), the factory station side is composed of switches, telecontrol equipment, protection/measurement and control IEDs, and primary equipment at the bottom layer (the devices are generally connected through the intranet). In the dispatching automation system, the telecontrol channel is a bridge connecting the dispatching master station and the plant station system. The plant station data is uploaded to the master station for monitoring through the telecontrol channel, and the master station issues instructions to the plant station equipment through the telecontrol channel. Therefore, the operation quality of the dispatching automation system is largely determined by the telecontrol channel. The failure of telecontrol communication usually manifests itself as a poor communication process, but it is necessary to specifically judge whether it is a failure of the channel itself or a failure of the use of the communication protocol. At present, there is a lack of effective means and tools, resulting in the repair of telecontrol channel failures often taking a long time. Put in more power.

The basic content of telecontrol information includes: remote signaling information, telemetry information, remote control information, and remote adjustment information. This information is the basis for dispatchers to make decisions and judgments. The data collected on the operating status of the power system is incorrectly reflected to the dispatch center, which will affect the dispatchers to make correct judgments and decisions. Therefore, it is very important to ensure the real-time and accuracy of telecontrol data.

Contents of the invention

The technical problem mainly solved by the present invention is to provide a method for automatically diagnosing the faults of remote signaling data transmission in the EMS system of the power grid, so as to ensure that the false positives and missed positives of the remote signaling displacement data information existing in the system can be found in the first time, and It can automatically and accurately locate false positive or false negative nodes, which greatly reduces the burden on operators while ensuring the accuracy of measurement information transmission in the power grid EMS system.

In order to solve the above technical problems, the present invention provides a method for automatically diagnosing the loss of remote signal displacement data in the EMS system of the power grid. Measurement and control intelligent equipment IED, remote control device, switch, the protection/measurement and control IED is connected to the remote control device through the internal network, the remote control device is connected to the switch through the internal network, and the switch communicates with the front end through the external network device connection, including the following steps:

Monitor each protection/measurement and control IED, remote control device, switch and the front-end communication device of the master station respectively, capture the communication messages of the measurement objects that meet the preset conditions, and use the communication messages from the communication messages Extract the remote signaling displacement data information;

If the remote signal displacement data information M1 extracted by the protection/measurement and control IED side is displaced, the remote signal omission and false alarm detection process is triggered to detect whether the remote signals of the same measurement object are respectively obtained within the corresponding time period. Remote signal displacement data information M2 on the moving device side, remote signal displacement data information M3 on the switch side, and remote signal displacement data information M4 on the front communication device side of the master station, and determine whether the values of M1, M2, M3, and M4 are the same; If it is detected that the M2 or M3 or M4 remote signal displacement data information is not obtained within the corresponding time period, it is determined that the corresponding remote control device or switch or the front-end communication device of the master station has a false report, and a remote signal false report alarm is generated; If the value of at least one of the remote signaling displacement data information in M2, M3, and M4 is inconsistent with M1, it is determined that the remote control device or switch or the front-end communication device of the master station corresponding to the inconsistent value has a false alarm, and a remote signaling error report is generated. police.

As a further improvement, the method also includes the following steps:

If the remote signal displacement data information M2, M3 or M4 on the front-end communication device side of the remote control device, the switchboard or the master station is displaced, it is judged whether the same measurement object has triggered the remote signal omission and false alarm detection process , if the remote signaling omission and false alarm detection process is not triggered, it is determined that the position corresponding to the displaced remote signaling displacement data information has a false alarm, and a remote signaling false alarm is generated.

As a further improvement, the remote signaling omission and false positive detection process further includes the following steps:

A Judging whether to obtain the latest M2 remote signal displacement data information of the same measurement object after the first preset time, if not obtained, generate a remote signal missing report alarm; if obtained, determine whether the value of M2 is the same as M1, if If it is different, a remote signal false report alarm will be generated;

B If M2 is obtained within the first preset time and M2 is the same as M1, then judge whether to obtain the latest M3 remote signal displacement data information of the same measurement object after the second preset time, if not, generate a remote signal Missed report alarm; if obtained, judge whether the M3 value is the same as M2, and if not, generate a remote signal false report alarm;

C If M3 is obtained within the second preset time and M3 is the same as M2, then judge whether to obtain the latest M4 remote signal displacement data information of the same measurement object after the third preset time, if not, generate a remote signal Missed report alarm; if it is obtained, it is judged whether the M4 value is the same as M3, and if it is different, a remote signal false report alarm is generated; if M4 is obtained within the third preset time and M4 is the same as M3, then the remote signal false report false alarm The detection process ends;

The first preset time, the second preset time, and the third preset time are the same or different.

As a further improvement, the structure of the remote signaling displacement data information consists of three parts: data value, quality code, and time stamp, and the determination of whether to obtain the latest M2, M3 or M4 remote signaling displacement data information of the same measurement object In the step, judgment is made according to the timestamp.

As a further improvement, after the step of extracting the remote signal displacement data information from the communication message, the following steps are also included:

Store the remote signaling displacement data information in a real-time database, compare the value of the remote signaling displacement data information to be stored with the current value of the remote signaling displacement data information in the real-time database, and determine the Whether the remote signaling displacement data information M1, M2, M3 or M4 on the side of the front-end communication device of the protection/measurement and control IED, remote control device, switchboard or master station has been displaced.

As a further improvement, a master station data diagnosis device is installed on the master station side to monitor the various protection/measurement and control IEDs, telecontrol devices, switches, and front-end communication devices of the master station as described above, and capture the data that meets the requirements. The communication message of the measurement object with preset conditions, and the step of extracting the remote signaling displacement data information from the communication message; and executing the remote signaling omission and false alarm detection process.

As a further improvement, a local data analysis device is installed on the plant side to monitor the various protection/measurement and control IEDs, telecontrol devices, and switches of the plant, and capture the communication reports of the measurement objects that meet the preset conditions. text, and the step of extracting remote signaling displacement data information from the communication message;

Set a master station data diagnosis device on the master station side, perform the monitoring of the master station, capture the communication message of the measurement object that meets the preset conditions, and extract the remote signal displacement data information from the communication message A step of.

As a further improvement, in the remote signaling omission and false positive detection process, the local data analysis device executes the steps A and B, and the master station data diagnosis device executes the step C.

Compared with the prior art, the embodiment of the present invention has the main difference and its effect in that it monitors the various protection/measurement and control IEDs, telecontrol devices, switches and the pre-communication devices of the master station in real time, and captures the information that meets the preset requirements. Set the communication message of the measurement object of the condition, and extract the remote signal displacement data information from the communication message; detect in real time whether the remote signal displacement data information M1 extracted by each protection/measurement and control IED side has changed , once the displacement occurs, the remote signal omission and false positive detection process will be triggered to detect whether the remote signal displacement data information M2 on the telecontrol device side and the remote signal displacement data information on the switch side of the same measurement object are normally obtained within the preset time M3 and the remote signal displacement data information M4 on the front communication device side of the master station, and judge whether the values of M1, M2, M3, and M4 are the same; if it is detected that the remote signal displacement of M2, M3 or M4 is not obtained within the preset time data information, it is determined that the corresponding remote control device or switch or the front-end communication device of the master station has missed a report, and a remote signal missing report alarm is generated; if the value of at least one remote signal displacement data information in M2, M3, and M4 is inconsistent with M1 , it is determined that the remote control device or switch or the front-end communication device of the master station corresponding to the inconsistent value has a false alarm, and a remote signal false alarm is generated. Through real-time multi-point monitoring and real-time detection and judgment of different communication nodes in the EMS system of the power grid, the false positives and false negatives of the remote signal displacement data information in the system can be found in the first time, and the false positives can be automatically and accurately located. Nodes that report or fail to report, while ensuring the accuracy of measurement information transmission in the power grid EMS system, greatly reduce the burden on operators.

Description of drawings

Fig. 1 is the communication network schematic diagram of power grid EMS system and substation automation system in the background technology;

Fig. 2 is a flow chart of the method for automatically diagnosing the loss of remote signaling displacement data in the EMS system of the power grid according to the first embodiment of the present invention.

Detailed ways

In order to make the purpose, technical solution and advantages of the present invention clearer, the following will further describe the implementation of the present invention in detail in conjunction with the accompanying drawings.

The first embodiment of the present invention relates to a method for automatically diagnosing the loss of remote signal displacement data in the EMS system of the power grid. The communication network structure between the EMS system of the power grid and the substation automation system includes: The protection/measurement and control intelligent equipment IED, telecontrol device, and switch in the factory station, among which the protection/measurement and control IED, telecontrol device, and switch are connected through the internal network, and the switch is connected to the front communication device through the external network to form Telecontrol channel, the measurement information is transmitted through the telecontrol channel.

In this embodiment, a master station data diagnosis device is installed on the master station side, and each protection/measurement and control type IED, telecontrol device, and switchboard installed in the factory station, as well as the front-end communication device arranged in the master station, are respectively real-time Monitor and capture the communication messages that meet the preset conditions, and extract the remote signal displacement data information from the communication messages, and perform multi-point remote signal displacement data information based on the remote signal displacement data information extracted from multiple points False positive and negative detection, so as to ensure the correct transmission of remote signal displacement data and timely detection of faults in an all-round way.

The specific process is shown in Figure 2.

In step 201, the master station data diagnosis device monitors the various protection/measurement and control IEDs, remote control devices, switches and the front-end communication device of the master station, captures the communication messages from the selected measurement object, and Extract the remote signal displacement data information M1, M2, M3, M4 from the communication message. In this embodiment, the remote signal displacement data information extracted and analyzed from the communication message monitored by the front-end communication device side of the master station is represented by M4; the communication message monitored from the IED side such as protection/measurement and control The extracted and analyzed remote signal displacement data information is represented by M1; the remote signal displacement data information extracted and analyzed from the communication message monitored by the remote control device side is represented by M2; the communication message monitored from the switch side is represented by M2 The remote signal displacement data information extracted and analyzed in this paper is represented by M3. Due to the obvious time characteristics of industrial data, the structure of the extracted remote signaling displacement data information can be represented by VQT (Value, Quality, Timestamp, data value, quality code, timestamp) in general.

In step 202, the master station data diagnosis device stores the monitored remote signaling displacement data information of the measurement object into the real-time database.

In step 203, the real-time database compares whether the value of the remote signaling displacement data to be stored at the same location of the same measurement object (that is, M1-M4) is the same as the value stored last time, that is, whether the value of the remote signaling displacement data to be stored is Displacement occurs, if displacement occurs, enter step 204, if no displacement occurs, this process ends. During specific implementation, an event trigger can be set to monitor in real time part of the storage space in the real-time database that stores remote signal displacement data. Once a certain value (any measurement object M1-M4 value) is found to be displaced, trigger event, go to step 204.

In step 204, it is judged whether the displaced remote signal displacement data is M1? If yes, go to step 205 to start the detection process of remote signaling mis-delivery and missing transmission; if it is not M1, that is, M2 or M3 or M4 is displaced, go to step 211.

In step 205, start the remote signal mis-send and miss-send detection process, the master station data diagnosis device detects the M2 remote signal displacement data information of the same measurement object after the first preset time period, according to the M2 remote signal displacement data information time stamp information (t) to determine whether the latest M2 remote signal displacement data information of the measurement object is currently received, and if received, go to step 206; If the fault warning is missed, this process ends.

In step 206, the data diagnosis device of the master station judges whether the M2 remote signal displacement data information of the measurement object is the same as M1, and if they are the same, then enters step 207, otherwise, enters step 212, and determines the position of the M2 (that is, the telecontrol equipment side ) there is a false alarm, a remote signal false positive fault alarm is generated, and this process ends.

In step 207, the master station data diagnosis device detects the M3 remote signal displacement data information of the same measurement object after the second preset time period, and judges whether the current time stamp information (t) in the M3 remote signal displacement data information is Receive the latest M3 remote signal displacement data information of the measurement object, if received, go to step 208, otherwise go to step 213, determine that there is a missing report at the position, generate a remote signal missing report fault warning, and end this process.

In step 208, the data diagnosis device of the master station judges whether the M3 remote signal displacement data information of the measurement object is the same as M2, and if they are the same, enter step 209; otherwise, enter step 212, and determine that the M3 position (ie, the switch side) In the case of false positives, a remote signal false negative fault alarm is generated, and this process ends.

In step 209, the master station data diagnosis device detects the M4 remote signal displacement data information of the same measurement object after the third preset time period, and judges whether the current time stamp information (t) in the M4 remote signal displacement data information is Receive the latest M4 remote signal displacement data information of the measurement object, if received, go to step 210, otherwise go to step 213, determine that there is a missing report at the position (that is, the front communication device side of the master station), and generate a remote signal If the fault warning is missed, this process ends.

In step 210, the data diagnosis device of the master station judges whether the M4 remote signaling displacement data information of the measurement object is the same as M3, and if they are the same, the detection process of this remote signaling error transmission and missing transmission ends; otherwise, it enters step 212 to determine the There is a false alarm at the M4 position (that is, the front-end communication equipment of the master station), and a remote signal false positive fault alarm is generated, and this process ends.

In step 211, for the case of displacement of M2, M3 or M4, firstly, it is judged whether the measurement object has a detection process of remote signaling error transmission or missing transmission, that is, it is judged whether M1 has been displaced (if M1 is displaced, then It will inevitably trigger the detection process of remote signaling error transmission and missing transmission. If the detection process is not triggered, it means that M1 has not changed position), if it has entered the remote signal error transmission and leakage detection process of the measurement object, this process will end; If there is no remote signaling error detection process for the measurement object, it indicates that the value of M2, M3, or M4 has changed when the value of the remote signal displacement data of the same measurement object M1 has not changed. , enter step 212, determine that there is a false alarm at the position where the displacement occurs, generate a remote signal false alarm fault alarm, and end this process.

This embodiment listens in real time to multiple main communication nodes distributed in the plant station and the master station (such as various protection/measurement and control IEDs of the plant station, telecontrol devices, switches, and front-end communication devices of the master station). After the remote signaling data value changes, the remote signaling omission and false alarm detection process is triggered in time. In the detection process, the omission and false alarm diagnosis are performed for different node positions, and the remote signaling of the corresponding equipment is generated according to the diagnosis results. False reporting and false reporting alarms; thus, it is possible to discover the false positives and false negatives of remote signaling data in the communication process between the EMS system and the substation automation system at the first time, and can automatically and accurately locate the false positives or false negatives nodes. While measuring the accuracy of information transmission in the system, it greatly reduces the burden on operators.

The second embodiment of the present invention also relates to a method for automatically diagnosing the loss of remote signal displacement data in the power grid EMS system. This embodiment is roughly the same as the first embodiment. The difference is that in the first embodiment, the master station The data diagnostic device monitors and detects remote signaling errors and missed transmissions on the protection/measurement and control IEDs, telecontrol devices, and switches of the plant station, as well as the front-end communication device of the master station. Set up a local data analysis device to monitor the various protection/measurement and control IEDs, telecontrol devices, and switches in the plant, capture the communication messages that meet the preset conditions, and extract the remote signal variables from the communication messages. Bit data information, and report the extracted remote signal displacement data information to the real-time database of the main station; the data diagnosis device of the main station only monitors the front-end communication device of the main station, and captures the communication messages that meet the preset conditions , and extract the remote signaling displacement data information from the communication message, and upload the extracted remote signaling displacement data information to the real-time database of the master station.

After triggering the detection process of remote signaling false positives and false negatives, the local data analysis device of the factory station will detect (judgment) the remote signaling false positives and false negatives of the remote signaling displacement data information of M1, M2, and M3, that is, the first Steps 205-208 in the embodiment are executed by the local data analysis device of the factory station. If it is determined that there is a missing or wrong delivery, the local data analysis device of the factory station will trigger the missing or wrong sending of the corresponding remote signal displacement data. Alarm (steps 212 and 213). The data diagnosis device of the master station only judges the missing report and false report of the M4 remote signal displacement data information on the side of the front communication device of the master station, that is, the steps 209 and 210 in the first embodiment are determined by the data diagnosis of the master station. The device executes, and if it is determined that there is a missing or wrong sending situation, the data diagnosis device of the master station will trigger a corresponding remote signaling displacement data missing or wrong sending alarm (steps 212 and 213). Therefore, in the case of one master station controlling multiple factories, facing the massive measurement data information of each factory station, it can effectively balance the load of the master station and greatly reduce the burden on the master station.

Although the present invention has been illustrated and described with reference to certain preferred embodiments thereof, it will be understood by those skilled in the art that various changes in form and details may be made therein without departing from the present invention. The spirit and scope of the invention.

Claims (7)

1. A method for automatically diagnosing the failure of remote signaling data transmission in the power grid EMS system. The communication network structure between the power grid EMS system and the substation automation system includes a front-end communication device set at the master station and a protection/measurement and control class set at the plant station Intelligent equipment IED, remote control device, switch, the protection/measurement and control IED is connected to the remote control device through the internal network, the remote control device is connected to the switch through the internal network, and the switch is connected to the front communication device through the external network , characterized in that it includes the following steps: Monitor each protection/measurement and control IED, remote control device, switch and the front-end communication device of the master station respectively, capture the communication messages of the measurement objects that meet the preset conditions, and use the communication messages from the communication messages Extract the remote signaling displacement data information; If the remote signal displacement data information M1 extracted by the protection/measurement and control IED side is displaced, the remote signal omission and false alarm detection process is triggered to detect whether the remote signals of the same measurement object are respectively obtained within the corresponding time period. Remote signal displacement data information M2 on the moving device side, remote signal displacement data information M3 on the switch side, and remote signal displacement data information M4 on the front communication device side of the master station, and determine whether the values of M1, M2, M3, and M4 are the same; If it is detected that the M2 or M3 or M4 remote signal displacement data information is not obtained within the corresponding time period, it is determined that the corresponding remote control device or switch or the front-end communication device of the master station has a false report, and a remote signal false report alarm is generated; If the value of at least one of the remote signaling displacement data information in M2, M3, and M4 is inconsistent with M1, it is determined that the remote control device or switch or the front-end communication device of the master station corresponding to the inconsistent value has a false alarm, and a remote signaling error report is generated. police; If the remote signaling displacement data information M2, M3 or M4 of the front-end communication device side of the remote control device, the switchboard or the master station is displaced, it is judged whether the same measurement object has triggered the false alarm of the remote signaling In the detection process, if the remote signal omission and false alarm detection process is not triggered, it is determined that the position corresponding to the displaced remote signal displacement data information has a false alarm, and a remote signal false report alarm is generated. 2. the method for automatically diagnosing power grid EMS system remote signaling data transmission failure according to claim 1, is characterized in that, described remote signaling omission false positive detection flow process further comprises the following steps: A Judging whether to obtain the latest M2 remote signal displacement data information of the same measurement object after the first preset time, if not obtained, generate a remote signal missing report alarm; if obtained, determine whether the value of M2 is the same as M1, if If it is different, a remote signal false report alarm will be generated; B If M2 is obtained within the first preset time and M2 is the same as M1, then judge whether to obtain the latest M3 remote signal displacement data information of the same measurement object after the second preset time, if not, generate a remote signal Missed report alarm; if obtained, judge whether the M3 value is the same as M2, and if not, generate a remote signal false report alarm; C If M3 is obtained within the second preset time and M3 is the same as M2, then judge whether to obtain the latest M4 remote signal displacement data information of the same measurement object after the third preset time, if not, generate a remote signal Missed report alarm; if it is obtained, it is judged whether the M4 value is the same as M3, and if it is different, a remote signal false report alarm is generated; if M4 is obtained within the third preset time and M4 is the same as M3, then the remote signal false report false alarm The detection process ends; The first preset time, the second preset time, and the third preset time are the same or different. 3. the method for automatically diagnosing power grid EMS system remote signal data transmission fault according to claim 2, it is characterized in that, the structure of described remote signal displacement data information is made of data value, quality code, time stamp three parts, so In the step of judging whether to acquire the latest M2, M3 or M4 remote signaling displacement data information of the same measurement object, the judgment is made according to the time stamp. 4. the method for automatically diagnosing the grid EMS system remote signal data transmission failure according to claim 2, it is characterized in that, after the described step of extracting remote signal displacement data information from communication message, also comprise the following steps: Store the remote signaling displacement data information in a real-time database, compare the value of the remote signaling displacement data information to be stored with the current value of the remote signaling displacement data information in the real-time database, and determine the Whether the remote signaling displacement data information M1, M2, M3 or M4 on the side of the front-end communication device of the protection/measurement and control IED, remote control device, switchboard or master station has been displaced. 5. according to the method for automatically diagnosing the electric network EMS system remote signal data transmission failure described in any one in claim 1 to 4, it is characterized in that, a master station data diagnosis device is set at the master station side, executes described to plant station Each protection/measurement and control IED, remote control device, switch, and front-end communication device of the master station are monitored, and the communication messages of the measurement objects that meet the preset conditions are captured, and the remote control is extracted from the communication messages. The step of sending and displacing data information; and executing the remote signaling omission and false positive detection process. 6. according to the method for the automatic diagnosis power grid EMS system remote signaling data transmission failure described in any one of claims 2 to 4, it is characterized in that, a local data analysis device is set at the station side, and executes described to station Each protection/measurement and control IED, telecontrol device, and switch monitors, captures the communication message of the measurement object that meets the preset conditions, and extracts the remote signal displacement data information from the communication message; Set a master station data diagnosis device on the master station side, perform the monitoring of the master station, capture the communication message of the measurement object that meets the preset conditions, and extract the remote signal displacement data information from the communication message A step of. 7. The method for automatically diagnosing the grid EMS system remote signaling data transmission fault according to claim 6, characterized in that, in the detection process of missing and false alarms of the remote signaling, the local data analysis device executes the step A and step B, the step C is executed by the master station data diagnosis device.