CN112486009B - Time service signal abnormal waveform recording analyzer and method - Google Patents
Time service signal abnormal waveform recording analyzer and method Download PDFInfo
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Abstract
The invention provides a time service signal abnormal waveform recording analyzer and a method, wherein the time service signal abnormal waveform recording analyzer comprises the following steps: the device comprises a sampling module, a local clock module, a transient storage module, a high-capacity nonvolatile storage module and a data processing module; the sampling module is used for collecting a time service signal and transmitting the time service signal to the local clock module and the transient storage module; the local clock module is used for receiving the time service signal, judging the abnormal condition of the time service signal in real time, generating an abnormal signal when the abnormal condition occurs and transmitting the abnormal signal to the data processing module; the data processing module is used for receiving the abnormal signal, transmitting the real-time data in the set time in the transient storage module to the high-capacity nonvolatile storage module and storing the data to form an abnormal recording file; acquiring a fault reason through analyzing the abnormal record file; the technical problems of accidental time service alarm, immediate resetting of the alarm and difficult field maintenance are solved, and the time service signals can be monitored and recorded in real time when IRIG-B code time service is adopted in a transformer substation, captured and analyzed repeatedly.
Description
Technical Field
The disclosure relates to a time service signal abnormal waveform recording analyzer and a method.
Background
In the existing power system, the IRIG-B code of RS485/422 level is the main time service mode adopted by secondary equipment. Due to the fact that on-site wiring is multiple, the quality of time service signals received by secondary equipment is poor or unstable due to reasons such as cable transmission distance, signal interference and load quantity, for example, voltage instability, burrs, signal jitter and the like. The instability causes accidental time service alarm, the alarm is immediately reset, the field maintenance is difficult, and the fault point is difficult to judge, so that the field operation and maintenance problem to be solved at present is urgent.
Disclosure of Invention
In order to solve the technical problems and achieve the purpose of determining fault points of sporadic time service alarm of secondary equipment, the disclosure considers that a time service signal abnormal waveform recording analyzer and a method are adopted to record and reproduce time service signal waveforms measured by the secondary equipment during alarm, and the problems of clock equipment, cable transmission, too much load and the like are determined through analysis, so that the problem of field operation and maintenance is solved.
In a first aspect, the present disclosure provides a time service signal abnormal waveform recording analyzer, including: the device comprises a sampling module, a local clock module, a transient storage module, a high-capacity nonvolatile storage module and a data processing module;
The sampling module is used for collecting a time service signal and transmitting the time service signal to the local clock module and the transient storage module;
the local clock module is used for receiving the time service signal, judging the abnormal condition of the time service signal in real time, generating an abnormal signal when the abnormal condition occurs and transmitting the abnormal signal to the data processing module;
the data processing module is used for receiving the abnormal signals, transmitting the real-time data in the set time in the transient storage module to the high-capacity nonvolatile storage module and storing the real-time data to form an abnormal recording file; and acquiring a fault reason through analyzing the abnormal record file.
In a second aspect, the present disclosure also provides a method for using the time service signal abnormal waveform recording analyzer according to the first aspect, including:
the sampling module is used for collecting a time service signal and transmitting the time service signal to the local clock module and the transient storage module;
receiving the time service signal through a local clock module, judging the abnormal condition of the time service signal in real time, generating an abnormal signal when the abnormal condition occurs, and transmitting the abnormal signal to a data processing module;
receiving the abnormal signal through the data processing module, transmitting the real-time data in the set time in the transient storage module to the high-capacity nonvolatile storage module and storing the data to form an abnormal recording file; and analyzing the abnormal record file to obtain the fault reason.
Compared with the prior art, this disclosure possesses following beneficial effect:
1. the data storage adopts transient storage to ensure the capture of real-time waveforms, takes 10s as a window period, circularly stores sampling data, internally judges whether a fault alarm is triggered or an external alarm signal is received, and then transfers the sampling data to a high-capacity nonvolatile memory to store the waveform data during the fault; the technical problems that accidental time service alarm, alarm return and field maintenance are difficult are solved, 100-1000M waveform data can be restored to be graphs by adopting a proper processor and a display module, the graphs are completely displayed on a screen of an analyzer in a certain proportion through a certain algorithm, and whether the time service signal waveform has burrs, distortion, punctual edge jitter and the like when the abnormal time service alarm exists is checked; when IRIG-B code time service is adopted in the transformer substation, real-time monitoring and recording of time service signals can be realized, occasional time service fault signals are captured and reappeared for analysis.
2. The high-speed sampling and A/D conversion rate disclosed by the invention can be used for capturing signals such as burrs and the like only when the frequency reaches 1M/s or higher, and the storage is finished under the frequency, certain hardware requirements are required on sampling, A/D conversion, unloading hardware and a memory, an FPGA is selected to replace a CPU device, fixed logic is adopted to directly store or unload the sampling data, and the sampling storage rate and stability can be ensured.
3. After receiving the time service signal, the time service fault alarm circuit divides the time service signal into one path to a built-in local clock, the local clock simulates decoding of secondary equipment, and meanwhile, the time service fault alarm of the secondary equipment is received. When fault analysis is carried out, the time service processing conditions of the secondary equipment and the local clock in the invention can be compared to be used as a reference for fault analysis, and the precision and the reliability of the waveform recording analyzer can be effectively improved.
Drawings
The accompanying drawings, which are incorporated in and constitute a part of this application, are included to provide a further understanding of the application, and the description of the exemplary embodiments and illustrations of the application are intended to explain the application and are not intended to limit the application.
Fig. 1 is a schematic structural view of an analyzer for recording abnormal waveforms of the timing signals.
The specific implementation mode is as follows:
the present disclosure is further illustrated by the following examples in conjunction with the accompanying drawings.
It should be noted that the following detailed description is exemplary and is intended to provide further explanation of the disclosure. Unless defined otherwise, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this application belongs.
It is noted that the terminology used herein is for the purpose of describing particular embodiments only and is not intended to be limiting of exemplary embodiments according to the present application. As used herein, the singular forms "a", "an" and "the" are intended to include the plural forms as well, and it should be understood that when the terms "comprises" and/or "comprising" are used in this specification, they specify the presence of stated features, steps, operations, devices, components, and/or combinations thereof, unless the context clearly indicates otherwise.
Example 1
In order to determine the fault point of the accidental time service alarm of the secondary equipment, the time service signal abnormal waveform recording analyzer is adopted to record and reproduce the time service signal waveform measured by the secondary equipment during the alarm, and the problems of clock equipment, cable transmission, too much load and the like are determined through analysis. The problem of on-site operation and maintenance is solved.
The utility model discloses a time service signal abnormal waveform record analysis appearance for electric power system transformer substation, including sampling module, AD conversion module, local clock module, storage module, data processing module, display module and management module etc.. The invention can realize real-time monitoring and recording of the time service signal when the IRIG-B code time service is adopted in the transformer substation, capture the sporadic time service fault signal and repeat the analysis.
As shown in fig. 1, the present disclosure provides a time signal abnormal waveform recording analyzer, comprising: the device comprises a sampling module, a local clock module, a transient storage module, a high-capacity nonvolatile storage module and a data processing module;
the sampling module is used for collecting a time service signal and transmitting the time service signal to the local clock module and the transient storage module;
The local clock module is used for receiving the time service signal, judging the abnormal condition of the time service signal in real time, generating an abnormal signal when the abnormal condition occurs and transmitting the abnormal signal to the data processing module;
the data processing module is used for receiving the abnormal signals, transmitting the real-time data in the set time in the transient storage module to the high-capacity nonvolatile storage module and storing the real-time data to form an abnormal recording file; and analyzing the abnormal record file to obtain the fault reason.
The system further comprises a management module, wherein the management module is used for receiving a time service alarm signal of the secondary equipment, transmitting the alarm signal to the data processing module, transmitting real-time data within set time in the transient storage module to the high-capacity nonvolatile storage module and storing the real-time data to form an abnormal recording file; specifically, the management module is connected to a time service abnormal alarm signal sent by time service equipment in the transformer substation, when a time service alarm occurs, abnormal waveform recording of the data processing module is triggered, real-time data of the last 10 seconds is copied to the high-capacity nonvolatile storage module through the transient storage module, a timestamp is printed, and an external trigger abnormal recording file is formed.
The management module is also connected with the display module, checks the time service receiving abnormal recording file through the display module, converts file data into an interface oscillogram, reproduces a time service signal waveform when the time service equipment sends out a time service abnormal alarm, and analyzes the reason of the fault alarm.
The management module is also used for controlling the data processing module to store, migrate and acquire data.
The management module is also used for receiving a time service signal abnormity indication of the local clock, controlling the data processing module to store, transfer and acquire data, checking a time service receiving abnormity recording file through the display module, converting the file data into an interface oscillogram, and verifying the quality of the time service signal of the transformer substation site.
The secondary equipment time service alarm signal is an accidental time service alarm caused by poor or unstable quality of the secondary equipment receiving the time service signal, such as unstable voltage, burr and signal jitter, and the time service mode of the secondary equipment is IRIG-B code of RS485/422 level.
The high-speed sampling module is used for collecting a time service signal and transmitting the time service signal to the high-speed A/D conversion module and the local clock module;
furthermore, the sampling module comprises a high-speed sampling module and a high-speed A/D conversion module, the high-speed sampling module is used for collecting time service signals and transmitting the time service signals to the local clock module and the high-speed A/D conversion module, the high-speed A/D conversion module converts voltage values of waveforms of the time service signals into digital quantities, and the data converted into the digital quantities are stored in the transient storage module in real time under the control of the data processing module;
Further, the local clock module receives the time service signal, judges and analyzes the signal, corrects the internal time of the local clock module, and keeps high-precision self-timekeeping when the time service signal is abnormal;
furthermore, the local clock module is used for receiving a time service signal, triggering abnormal waveform recording of the data module when the time service signal shakes, time information jumps, burrs exist in the signal and the like, copying real-time data within set time from the transient storage module to the large-capacity nonvolatile storage module, and printing a time stamp to form a time service receiving abnormal recording file. The set time is within the first 1-20 seconds, preferably within the first 10 seconds, of the time when the time signal jitter occurs.
Further, after receiving the time service signal, the local clock module performs signal judgment and analysis, corrects the internal time of the local clock module, keeps high-precision self-timekeeping when the time service signal is abnormal, copies the real-time data of the latest 10 seconds from the transient module to the large-capacity nonvolatile storage module, and prints a timestamp to form a time service receiving abnormal recording file;
furthermore, the data processing module is used for controlling the high-speed AD module to record the waveform data to the transient storage module in real time. And according to the instructions of the management module and the local clock, the data of the transient storage module is transferred to the large-capacity nonvolatile storage module.
Further, the power system records grid fault waveforms with a sampling rate of 256 points/second or higher, which may require one million points/second or higher. High-speed sampling and A/D conversion rate, can capture signals such as burrs only when reaching 1M/s or higher frequency, and can finish storage under the frequency, and certain hardware requirements are provided for sampling, A/D conversion, unloading hardware and a memory. According to the method, the FPGA is selected to replace a CPU device, and the sampling data is directly stored or transferred by adopting fixed logic, so that the sampling and storing speed and stability can be ensured.
Further, data storage adopts transient storage to guarantee capture of real-time waveforms, a window period of 10s is taken as one window period, sampling data are stored in a circulating mode, and after internal judgment is made that a fault alarm is triggered or an external alarm signal is received, the sampling data are stored in a high-capacity nonvolatile memory in a transferring mode to store waveform data during fault. The large-capacity nonvolatile memory module adopts a nonvolatile memory (abbreviated as NVM), which is a computer memory that stored data does not disappear when the current is turned off.
Furthermore, a proper processor and a display module are adopted to restore 100-1000M waveform data into a graph, and the graph is completely displayed on an analyzer screen in a certain proportion through a certain algorithm to check whether the timing signal waveform has burrs, distortion, on-time edge jitter and the like when a timing abnormal alarm exists.
Furthermore, after receiving the time service signal, the method divides a path to a built-in local clock through the driving circuit, simulates decoding of the secondary equipment by the local clock, and receives time service fault alarm of the secondary equipment. In fault analysis, the timing processing conditions of the secondary equipment and the local clock in the disclosure can be compared to be used as a reference for fault analysis.
Example 2
A use method of a time service signal abnormal waveform recording analyzer comprises the following steps:
a sampling module is used for collecting a time service signal and transmitting the time service signal to a local clock module and a transient storage module;
receiving the time service signal through a local clock module, judging the abnormal condition of the time service signal in real time, generating an abnormal signal when the abnormal condition occurs, and transmitting the abnormal signal to a data processing module;
receiving the abnormal signal through the data processing module, transmitting the real-time data in the set time in the transient storage module to the high-capacity nonvolatile storage module and storing the data to form an abnormal recording file; and analyzing the abnormal record file to obtain the fault reason.
The management module is used for receiving a time service alarm signal of the secondary equipment, transmitting the alarm signal to the data processing module, and transmitting real-time data within set time in the transient storage module to the high-capacity nonvolatile storage module for storage to form an abnormal recording file; specifically, the management module is connected to a time service abnormal alarm signal sent by time service equipment in the transformer substation, when a time service alarm occurs, abnormal waveform recording of the data processing module is triggered, real-time data of the last 10 seconds is copied to the high-capacity nonvolatile storage module through the transient storage module, a timestamp is printed, and an external trigger abnormal recording file is formed.
Although the present disclosure has been described with reference to specific embodiments, it should be understood that the scope of the present disclosure is not limited thereto, and those skilled in the art will appreciate that various modifications and changes can be made without departing from the spirit and scope of the present disclosure.
Claims (9)
1. An abnormal waveform recording analyzer of a time service signal is characterized by comprising: the device comprises a sampling module, a local clock module, a transient storage module, a high-capacity nonvolatile storage module, a data processing module and a management module;
the sampling module is used for collecting a time service signal and transmitting the time service signal to the local clock module and the transient storage module;
the local clock module is used for receiving the time service signal, judging the abnormal condition of the time service signal in real time, generating an abnormal signal when the abnormal condition occurs and transmitting the abnormal signal to the data processing module;
the data processing module is used for receiving the abnormal signal, transmitting the real-time data in the set time in the transient storage module to the high-capacity nonvolatile storage module and storing the data to form a first abnormal recording file; acquiring a fault reason through analyzing a first abnormal recording file, wherein the analyzing of the first abnormal recording file comprises the steps of restoring 100-1000M pieces of waveform data into a graph, and completely displaying the graph on an analyzer screen to check whether burrs, distortion and on-time edge jitter exist in a time service signal waveform when a time service abnormal alarm exists;
The management module is used for receiving a time service alarm signal of the secondary equipment and transmitting the alarm signal to the data processing module, the data processing module transmits real-time data within a set time in the transient storage module to the high-capacity nonvolatile storage module and stores the real-time data to form a second abnormal recording file, and the analysis process of the second abnormal recording file is the same as the analysis process of the first abnormal recording file.
2. The time service signal abnormal waveform recording analyzer as claimed in claim 1, wherein the management module is further connected to the display module, and the management module is further configured to view the time service receiving second abnormal recording file through the display module, convert the file data into an interface waveform diagram, reproduce the time service signal waveform when the secondary device sends out a time service abnormal alarm, and analyze the cause of the fault alarm.
3. The abnormal waveform recording analyzer of the time service signal of claim 1, wherein the management module is further configured to receive an abnormal time service signal indication from a local clock, control the data processing module to store, migrate, obtain data, view a first abnormal recording file received by time service through the display module, convert the file data into an interface waveform diagram, and verify the quality of the time service signal at the substation site.
4. The apparatus according to claim 1, wherein the sampling module comprises a high-speed sampling module and a high-speed a/D conversion module, the high-speed sampling module is configured to collect the time signal and transmit the time signal to the local clock module and the high-speed a/D conversion module, and the high-speed a/D conversion module converts a voltage value of the waveform of the time signal into a digital value and stores the digital value in the transient storage module in real time under the control of the data processing module.
5. The apparatus according to claim 1, wherein the local clock module receives the time signal, determines and analyzes the signal, corrects the internal time of the local clock module, and maintains high-precision self-timing when the time signal is abnormal.
6. The abnormal waveform recording analyzer of the time service signal as claimed in claim 1, wherein the local clock module is used for receiving the time service signal, when the time service signal shakes, the time information jumps and burrs exist in the signal, the abnormal waveform recording of the data processing module is triggered, the real-time data in the set time is copied to the large-capacity nonvolatile storage module from the transient storage module, and a time stamp is printed to form a first abnormal recording file for receiving the time service signal.
7. The apparatus according to claim 1, wherein the data processing module is configured to control the high-speed a/D conversion module to record waveform data in real time into the transient storage module; and according to the instructions of the management module and the local clock, transferring the data of the transient storage module to the high-capacity nonvolatile storage module.
8. A method of using the time service signal abnormal waveform recording analyzer as claimed in any one of claims 1-7, comprising:
a sampling module is used for collecting a time service signal and transmitting the time service signal to a local clock module and a transient storage module;
receiving the time service signal through a local clock module, judging the abnormal condition of the time service signal in real time, generating an abnormal signal when the abnormal condition occurs, and transmitting the abnormal signal to a data processing module;
receiving the abnormal signal through the data processing module, transmitting the real-time data in the set time in the transient storage module to the high-capacity nonvolatile storage module and storing the data to form a first abnormal recording file; and acquiring a fault reason through analyzing the first abnormal record file.
9. The use method of the time service signal abnormal waveform recording analyzer as claimed in claim 8, further comprising the steps of receiving a time service alarm signal of the secondary equipment through the management module, transmitting the alarm signal to the data processing module, and transmitting real-time data within a set time in the transient storage module to the large-capacity nonvolatile storage module and storing the real-time data to form a second abnormal recording file.
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| CN207799002U (en) * | 2018-04-16 | 2018-08-31 | 山东山大电力技术股份有限公司 | A kind of non-contact travelling wave ranging system of distribution |
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