CN110019450B - Wave recording data selecting, storing and uploading method and system - Google Patents
Wave recording data selecting, storing and uploading method and system Download PDFInfo
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- CN110019450B CN110019450B CN201710891057.9A CN201710891057A CN110019450B CN 110019450 B CN110019450 B CN 110019450B CN 201710891057 A CN201710891057 A CN 201710891057A CN 110019450 B CN110019450 B CN 110019450B
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- G06F16/00—Information retrieval; Database structures therefor; File system structures therefor
- G06F16/20—Information retrieval; Database structures therefor; File system structures therefor of structured data, e.g. relational data
- G06F16/25—Integrating or interfacing systems involving database management systems
Abstract
The invention relates to a method and a system for selecting, storing and uploading wave recording data. Firstly, the main station carries out load flow calculation aiming at an expected accident according to collected data of the power system, and issues a data selection requirement to a required wave recording device according to a calculation result; the data selection requirement comprises parameter information; then, the wave recording device carries out parameter setting according to the received data interception requirement, reselects the required data, generates a new file and uploads the new file to the main station. The method provides timely, reliable and accurate data for event reduction, inversion and evaluation, and avoids data loss caused by other factors. Meanwhile, the data sent by the wave recording device is the data regenerated after being screened from the data collected by the wave recording device according to the data interception requirement issued by the main station, so that the method is more efficient, quicker and more accurate, and comprehensive and timely information support is provided for analysis of power grid action behaviors and system protection behaviors.
Description
Technical Field
The invention belongs to the technical field of power system automation, and particularly relates to a wave recording data selecting, storing and uploading method and system.
Background
Modern power systems integrate power generation, power transformation, power transmission, power distribution and power utilization, and are wide in related range, various in elements and complex in structure. The problem of safe and stable operation of the power system is a worldwide problem related to social stability and economic development, power enterprises in various countries pay high attention to the problem of safety of the power system, and a great deal of manpower and financial resources are invested to develop research for guaranteeing the problem of safety of the power system.
The electric power system fault recorder is the foundation for researching modern electric network, and is an important device for recording electric quantity in the electric power system, and reflects the operation state of each electric power device in the electric power system, so that the electric network wave recording data is an important basis for evaluating relay protection action and analyzing the fault property and reason of the device, and is also the foundation for verifying various dynamic processes before, during and after the evaluation.
However, the current data recording system has certain defects: the data storage mode is too solid, the transient data file only stores data of several seconds before and after the disturbance according to a set fixed value, the continuous data file also only stores data of the whole station according to the storage duration or a fixed size, accurate data which takes an event as a target cannot be stored, and the inversion capability of the comprehensive event is poor; data are multi-state and difficult to unify in time sequence; partial data is lack of timeliness, when an accident occurs in a power grid, due to the fact that the data span range is large, various recording devices cannot be communicated with one another, the difficulty difference of data collection is large, the data collection coordination difficulty is limited by the capacity, the technical level, human factors and the like of the recording devices, some key data are lost due to data access delay and cannot be recovered, and partial event analysis cannot be conducted due to the fact that data are lack.
Disclosure of Invention
The invention aims to provide a method and a system for selecting, storing and uploading recorded wave data, which are used for solving the problem of poor event inversion capability caused by large data volume when the recorded wave data are directly acquired from a wave recording device in the prior art.
In order to solve the technical problems, the technical scheme of the invention is as follows:
the invention provides a method for selecting, storing and uploading recorded wave data, which comprises the following method schemes:
the first method scheme comprises the following steps:
the main station carries out load flow calculation aiming at an expected accident according to the collected data of the power system, and issues a data selection requirement to a required wave recording device according to a calculation result; the data selection requirement comprises parameter information;
the wave recording device carries out parameter setting according to the received data selection requirement, reselects the required wave recording data, generates a new file and uploads the new file to the main station.
In the second method, on the basis of the first method, the parameter information includes a required start time and end time, a required storage frequency, and a required channel.
And in a third method scheme, on the basis of the second method scheme, the selecting and storing frequency issued by the main station is not more than the sampling frequency of the wave recording device.
In the fourth method, the required start time is less than the required end time on the basis of the second method.
And a fifth method scheme, on the basis of the first method scheme, before issuing a data selection requirement to the required wave recording device according to the calculation result, the method further comprises the step of sending the corresponding relation of the physical meanings of all the channels on the wave recording device.
And a sixth method scheme, wherein on the basis of the second method scheme, the step of reselecting the required wave recording data to generate a new file comprises the following steps: and combining one or more stored original continuous data according to the starting time and the ending time, and selecting required wave recording data according to the required storage frequency and the required channel according to the required detailed time period to generate a new file.
In the seventh method, based on the first method, the step of uploading the generated new file to the master station includes: the main station calls the stored recording file list, the recording device returns the file list, the main station calls the stored recording file according to the file name in the list, and the recording device uploads the file to the main station.
The invention also provides a recording data selecting, storing and uploading system, which comprises the following system scheme:
the system scheme I comprises a main station and a wave recording device;
the main station is used for carrying out load flow calculation aiming at an expected accident according to the collected data of the power system and issuing a data selection requirement to a required wave recording device according to a calculation result; the data selection requirement comprises parameter information;
the wave recording device is used for setting parameters according to the received data selection requirements, selecting and collecting required wave recording data and uploading the wave recording data to the main station.
And in the second system scheme, on the basis of the first system scheme, the parameter information comprises required starting time and ending time, required storage frequency and required channels.
And in the third system scheme, on the basis of the second system scheme, the selecting and storing frequency issued by the master station is not more than the sampling frequency of the wave recording device.
And in the fourth system scheme, on the basis of the second system scheme, the required starting time is less than the required ending time.
And on the basis of the first system scheme, before issuing a data interception requirement to the required wave recording device according to a calculation result, the wave recording device is also used for uploading the corresponding relation of the physical meanings of all the channels.
And on the basis of the second system scheme, the wave recording device combines one or more stored original continuous data according to the starting time and the ending time, and selects the required wave recording data according to the required storage frequency and the required channel according to the required detailed time period to generate a new file.
And a seventh system scheme, wherein on the basis of the first system scheme, the main station calls a selected and stored wave recording file list, the wave recording device returns the file list, the main station replaces the selected and stored wave recording file very early according to the file name in the list, and the wave recording device uploads the file to the main station.
The invention has the beneficial effects that:
according to the method and the device for selecting, storing and uploading the recording data, a possible disturbance event is expected before a fault event occurs, a data interception requirement is determined in advance by a master station, the data requirement is matched immediately after the event occurs, the recording device collects key data in time, timely, reliable and accurate data are provided for event reduction, inversion and evaluation, and the situation that data are lost due to other factors is avoided. Meanwhile, the data sent by the wave recording device is the data regenerated after being screened from the wave recording data collected by the wave recording device according to the data interception requirement issued by the main station, and the required data does not need to be manually selected from the existing one or more file data stored by the wave recording device, so that the method is more efficient, quicker and more accurate. Therefore, comprehensive and timely information support is provided for analysis of power grid action behaviors and system protection behaviors.
Drawings
FIG. 1 is a flow chart of the method for selecting, storing and uploading recorded wave data according to the present invention;
FIG. 2 is a model design diagram used in the examples.
Detailed Description
In order to make the objects, technical solutions and advantages of the present invention clearer, the present invention is further described in detail below with reference to the accompanying drawings and embodiments.
The flow of the method for selecting, storing and uploading the recording data is shown in fig. 1, and the method comprises the following steps:
firstly, when the power system normally operates, the main station of the panoramic sensing wave recording system calculates the load flow, the stability and the short-circuit current aiming at the expected accident by using the online data as input through a high-speed private network, constructs a data judgment index based on the calculation and analysis result, selects sensitive equipment at the time of the accident, and puts forward data selection requirements of data types, data ranges and the like aiming at the equipment. The master station of the panoramic perception wave recording system selects key points according to characteristic analysis perception data and sends parameter information of the key points to the wave recording device through writing service.
The parameter information includes key data such as a specified time period (including a start time and an end time), a specified storage frequency, a specified channel (including an analog channel and a digital channel), and the like. All the key data need to extend DO type, and can be automatically extended according to IEC 61850.
The wave recording device needs to send the corresponding relation of the physical meanings of all channels first, and the main station checks and selects the needed channels and then sends the channels. And the starting time issued by the master station of the panoramic sensing wave recording system is smaller than the ending time, otherwise, the wave recording device can reply the write service failure. The designated selecting and storing frequency issued by the master station of the panoramic sensing wave recording system is not more than the sampling frequency of the wave recording device, otherwise, the wave recording device can reply the write service failure.
And then, after receiving the parameter issuing identification as the start, the wave recording device receives and caches the parameter information issued by the main station of the panoramic perception wave recording system. The analog quantity channel and the switching value channel are issued for multiple times, and one channel number is issued each time. If the information such as the multiple storage frequency and the designated time period is received, the last time of receiving is taken as the standard. And when the received issued identification is completed, the parameter setting is considered to be completed. The uploading files are selected and stored to start remote signaling, parameters are issued, the files are selected and stored to be expanded into DO types, and the files can be automatically expanded according to IEC 61850.
And then, the wave recording device carries out parameter setting according to the received data interception requirement, after the parameter setting is finished, continuous data are stitched according to the appointed starting time, the data are intercepted according to the ending time, the original data are sampled and collected according to the appointed cache frequency, the appointed channel is selected, and the data are stored.
During storage, a main index taking an event as a service target is constructed, a time sequence is taken as a storage secondary index, data reflecting system dynamic behavior sensitivity is screened from wave recording data stored in a distributed mode, an event-data mapping pair set is constructed, collected data are acquired, and various dynamic process time sequence states need to be calibrated according to the sequence of occurrence and development of the event, so that the data are stored in order. The method provides timely and reliable data capable of reflecting the real operation characteristics of the system for event evaluation and event inversion.
And finally, the wave recording device sends the selected and stored file to a main station of the panoramic sensing wave recording system. The specific uploading process is as follows: the main station calls a wave recording file list selected and stored according to a main station screening principle through an extended "/COMTRADE _ XXX/" file directory calling command, the wave recording device returns the file list, and the main station calls the file according to the list and uploads the file by the wave recording device.
Wherein, the model design of the DO type expanded in the above steps is shown in FIG. 2.
Firstly, when a master station issues a selection principle, an analog quantity channel AnaChnl and a switching quantity channel DigChnl are issued for multiple times, and each channel is numbered, wherein the number of the analog quantity channels is 192 at most, and the number of the switching quantity channels is 1024 at most; the start time StartTm and the end time EndTm are of the TSG type, the time span is not more than 120 seconds, and the selective sampling frequency AmpFre is not more than 4 kHz.
Then, after receiving the parameter and issuing ParaStart as true, the wave recording device starts to cache the issued parameter; if the multiple sampling frequency and time parameters are received, and the last time of receiving is taken as the standard, after Parastart is received as false, the parameter setting is considered to be completed, the file is uploaded, the remote signaling is started to select and store, SelMade is set as false, and the file is started to be selected and stored.
And then, the wave recording device intercepts, samples and selects one or more continuously stored files according to parameters such as time, channel, frequency and the like, then stores the selected files to generate a file, uploads the file to be selected and stored to complete remote signaling, and the SelMade is set to true.
And finally, calling a wave recording file list selected and stored according to a main station screening principle by the main station through an extended "/COMTRADE _ SEL/" file directory calling command, returning the file list by the wave recording device, calling the file by the main station according to the list, and finishing data uploading by the wave recording device.
A specific example is given below. For example: the XX main station predicts that the XX line of the 14 XX station at the 15 th site possibly has current short circuit fault according to the whole net rack data and preset accidents, screens out data possibly related to four stations according to the data, and immediately sends wave recording data selection requirements to the four stations after the fault occurs, wherein the parameters comprise: the failure starts from 14:00 to 14:02 minutes, the channels only comprise 6 or 9 channels possibly related to one line in the station, data with the sampling frequency of 2kHz is sampled, each wave recording device rapidly generates a new file through the obtained parameters and uploads the new file to the main station, and the main station can obtain an accurate, comprehensive and reliable data set with the event of the expected accident as a main index and the time sequence as a secondary index at the first time, so that timely and reliable data capable of comprehensively reflecting the real operation characteristics of the system are provided for event evaluation and event inversion.
The invention also provides a wave recording data selecting, storing and uploading system, which comprises a main station and a wave recording device; the main station is used for carrying out load flow calculation aiming at an expected accident according to the collected data of the power system and issuing a data interception requirement to a required wave recording device according to a calculation result; the data interception requirement comprises parameter information; the wave recording device is used for setting parameters according to the received data interception requirement, selecting and collecting required wave recording data and uploading the wave recording data to the main station.
The essence of the system is that the method is implemented, and the description of the method is clear enough, so that the system is not described in detail.
While the present invention has been described in detail with reference to the preferred embodiments, it should be understood that the above description should not be taken as limiting the invention. Various modifications and alterations to this invention will become apparent to those skilled in the art upon reading the foregoing description. Accordingly, the scope of the invention should be determined from the following claims.
Claims (14)
1. A method for selecting, storing and uploading recorded wave data is characterized by comprising the following steps:
the main station carries out load flow calculation aiming at an expected accident according to the collected data of the power system, and issues a data selection requirement to a required wave recording device according to a calculation result; the data selection requirement comprises parameter information;
the wave recording device carries out parameter setting according to the received data selection requirement, reselects the required wave recording data, generates a new file and uploads the new file to the main station.
2. The recording data storing and uploading method according to claim 1, wherein the parameter information includes a required start time and end time, a required storing frequency, and a required channel.
3. The method of claim 2, wherein the frequency of the selecting and storing transmitted by the master station is not greater than the sampling frequency of the recording device.
4. The method of claim 2, wherein the requested start time is less than the requested end time.
5. The method of claim 1, further comprising the step of sending the correspondence between the physical meanings of all channels to the recording device before sending the data selection request to the desired recording device according to the calculation result.
6. The recording data selecting, storing and uploading method of claim 2, wherein the step of re-selecting the desired recording data to generate a new file comprises: and combining one or more stored original continuous data according to the starting time and the ending time, and selecting required wave recording data according to the required storage frequency and the required channel according to the required detailed time period to generate a new file.
7. The recording data selecting, storing and uploading method as claimed in claim 1, wherein the step of uploading the generated new file to the master station comprises: the main station calls the stored recording file list, the recording device returns the file list, the main station calls the stored recording file according to the file name in the list, and the recording device uploads the file to the main station.
8. A wave recording data selecting, storing and uploading system is characterized by comprising a main station and a wave recording device;
the main station is used for carrying out load flow calculation aiming at an expected accident according to the collected data of the power system and issuing a data selection requirement to a required wave recording device according to a calculation result; the data selection requirement comprises parameter information;
the wave recording device is used for setting parameters according to the received data selection requirements, reselecting the required wave recording data, generating a new file and uploading the new file to the main station.
9. The recording data archiving and uploading system according to claim 8, wherein the parameter information includes a desired start time and end time, a desired archiving frequency, and a desired channel.
10. The recording data storing and uploading system of claim 9, wherein the storing frequency issued by the master station is not greater than the sampling frequency of the recording device.
11. The recorded wave data storage and upload system of claim 9 wherein the requested start time is less than the requested end time.
12. The recording data selecting, storing and uploading system of claim 8, further comprising a step of uploading the correspondence of physical meanings of all channels to the recording device before issuing the data selecting request to the desired recording device according to the calculation result.
13. The recording data selecting, storing and uploading system of claim 9, wherein the step of re-selecting the desired recording data to create a new file comprises: and combining one or more stored original continuous data according to the starting time and the ending time, and selecting required wave recording data according to the required storage frequency and the required channel according to the required detailed time period to generate a new file.
14. The recorded wave data storage and upload system of claim 8 wherein the step of uploading the generated new file to the master station comprises: the main station calls the stored recording file list, the recording device returns the file list, the main station calls the stored recording file according to the file name in the list, and the recording device uploads the file to the main station.
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