CN117596190B - System and method for testing secondary signal transmission delay characteristics of transformer substation - Google Patents
System and method for testing secondary signal transmission delay characteristics of transformer substation Download PDFInfo
- Publication number
- CN117596190B CN117596190B CN202410073656.XA CN202410073656A CN117596190B CN 117596190 B CN117596190 B CN 117596190B CN 202410073656 A CN202410073656 A CN 202410073656A CN 117596190 B CN117596190 B CN 117596190B
- Authority
- CN
- China
- Prior art keywords
- data
- unit time
- transmission
- time
- unit
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Active
Links
- 230000008054 signal transmission Effects 0.000 title claims abstract description 98
- 238000012360 testing method Methods 0.000 title claims abstract description 50
- 238000000034 method Methods 0.000 title claims abstract description 17
- 230000005540 biological transmission Effects 0.000 claims abstract description 145
- 238000012545 processing Methods 0.000 claims abstract description 27
- 238000010998 test method Methods 0.000 claims abstract description 5
- 238000012544 monitoring process Methods 0.000 claims description 21
- 238000004891 communication Methods 0.000 claims description 19
- 238000005070 sampling Methods 0.000 claims description 17
- 230000007246 mechanism Effects 0.000 claims description 13
- 238000004140 cleaning Methods 0.000 claims description 10
- 238000004458 analytical method Methods 0.000 claims description 9
- 238000000605 extraction Methods 0.000 claims description 9
- 230000003993 interaction Effects 0.000 claims description 7
- 230000008859 change Effects 0.000 claims description 6
- 230000008569 process Effects 0.000 claims description 6
- 238000004364 calculation method Methods 0.000 claims description 5
- 238000012423 maintenance Methods 0.000 claims description 4
- 230000000007 visual effect Effects 0.000 claims description 4
- 238000010276 construction Methods 0.000 claims description 3
- 238000013480 data collection Methods 0.000 claims description 3
- 238000013075 data extraction Methods 0.000 claims description 3
- 238000005259 measurement Methods 0.000 abstract description 3
- 230000000694 effects Effects 0.000 description 5
- 230000003044 adaptive effect Effects 0.000 description 3
- 230000009286 beneficial effect Effects 0.000 description 2
- 238000006243 chemical reaction Methods 0.000 description 2
- 238000013523 data management Methods 0.000 description 2
- 238000005516 engineering process Methods 0.000 description 2
- 238000007726 management method Methods 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 238000003908 quality control method Methods 0.000 description 2
- 230000009467 reduction Effects 0.000 description 2
- 238000012800 visualization Methods 0.000 description 2
- 230000002411 adverse Effects 0.000 description 1
- 230000003321 amplification Effects 0.000 description 1
- 238000010420 art technique Methods 0.000 description 1
- 238000013473 artificial intelligence Methods 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 238000001914 filtration Methods 0.000 description 1
- 238000003199 nucleic acid amplification method Methods 0.000 description 1
- 238000004088 simulation Methods 0.000 description 1
- 230000001360 synchronised effect Effects 0.000 description 1
Abstract
The invention discloses a system and a method for testing secondary signal transmission delay characteristics of a transformer substation, and relates to the technical field of transformer substation testing. In order to solve the problems that in the prior art, the transmission of the secondary signal of the transformer substation cannot be monitored in real time, the transmission delay of the secondary signal can only be roughly estimated, an accurate measurement result cannot be provided, and the stability and the reliability of a power system are limited; the secondary signal transmission delay characteristic test system of the transformer substation comprises an analog quantity generation unit, a signal transmission unit, a signal processing unit and a delay characteristic test unit; the transmission safety and the transmission efficiency of the signal transmission channel are monitored in real time, the integrity, the new accuracy and the delay characteristic of the secondary signal transmission of the transformer substation are guaranteed, the test result is effectively tested and evaluated, a more accurate and efficient test method is provided, and important technical support is provided for the stable operation of the power system, so that the stability and the reliability of the power system are improved.
Description
Technical Field
The invention relates to the technical field of transformer substation testing, in particular to a system and a method for testing secondary signal transmission delay characteristics of a transformer substation.
Background
The intelligent substation is an important component and key link of the intelligent power grid, and adopts advanced technologies such as sensing information, communication, control, artificial intelligence and the like to establish a digital unified application platform for collecting, transmitting, analyzing and processing all information of the whole substation, so that informatization, automation and interaction of the substation are realized. The secondary signal is the most core content of the transformer substation, and the performance of the secondary signal directly influences the reliable operation of the intelligent transformer substation. Related patents exist about the testing of secondary signal transmission delay characteristics of a transformer substation; for example, chinese patent publication No. CN103777104a discloses a device and a method for testing delay characteristics of a secondary signal transmission system of a digital transformer substation, which can test delay characteristics of the secondary signal transmission system of the digital transformer substation. The patent marks the position of the cycle through the magnitude of the amplitude, and solves the interference of the whole cycle delay to the delay test; the self-generating synchronous clock signal is adopted, so that strict synchronization of internal sampling and signal loop sampling is ensured, and the accuracy of the detected delay characteristic is ensured; and comparing and determining the corresponding relation between the internal sampling points and the sampling points of the signal loop by adopting window comparison, and comparing and calculating the time difference of the corresponding sampling points to obtain delay characteristic information and reflect the jitter information of the transmission time difference of the system.
The above patent can test the delay characteristics of the secondary signal transmission system of the digital transformer substation, but still has the following problems:
in the prior art, the transmission of the secondary signal of the transformer substation cannot be monitored in real time, the transmission delay of the secondary signal can only be roughly estimated, an accurate measurement result cannot be provided, and in order to ensure that the data transmission delay is reduced, the data sharing of the power system cannot be realized, so that the data cannot be shared and analyzed in time, and a large amount of data cannot be effectively processed and analyzed, so that the stability and reliability of the power system are limited.
Disclosure of Invention
The invention aims to provide a system and a method for testing the delay characteristics of secondary signal transmission of a transformer substation, which effectively test and evaluate the delay characteristics of secondary signal transmission of the transformer substation, provide a more accurate and more efficient testing method, and provide important technical support for the stable operation of a power system, thereby improving the stability and the reliability of the power system and solving the problems in the background technology.
In order to achieve the above purpose, the present invention provides the following technical solutions:
substation secondary signal transmission time delay characteristic test system includes: the device comprises an analog quantity generating unit, a signal transmission unit, a signal processing unit and a delay characteristic testing unit;
The analog quantity generation unit is used for acquiring the operation data of the actual power system, generating analog signals based on the operation data, and classifying according to the simulated characteristics to generate a plurality of analog quantity data sets;
the signal transmission unit is used for constructing a signal transmission channel, safely transmitting the plurality of analog quantity data sets based on the signal transmission channel, and monitoring the transmission safety of the analog quantity data sets in real time;
the signal processing unit is used for receiving a plurality of analog quantities acquired from the signal transmission channel, extracting signal characteristics, performing correlation calculation and determining the signal characteristics as secondary signal loop data of the transformer substation;
and the delay characteristic testing unit is used for carrying out parameter analysis on the secondary signal loop data of the transformer substation, obtaining an analysis result to determine the secondary signal transmission delay characteristic of the transformer substation, and carrying out visual display on the operation data of the power system.
Further, the analog quantity generation unit includes:
the data acquisition module is used for acquiring the operation data of the actual power system in real time, comprising continuous power frequency sinusoidal current/voltage signals in the power grid, and converting the acquired current/voltage signals to obtain corresponding digital quantities;
And the analog quantity classification module is used for extracting analog signal characteristics of the corresponding digital quantity, determining the analog quantity category of each digital quantity, classifying and integrating the operation data of the power system corresponding to the digital quantity based on the analog quantity category, and generating an analog quantity data set of the category.
Further, the data acquisition module includes:
the time information extraction module is used for extracting an upper limit time value and a lower limit time value of a value range of unit time, wherein the value range of the unit time is 1min-3min;
the first data volume information acquisition module is used for determining that the first unit time is the lower time value of the value range of the unit time and acquiring the data volume of the operation data of the actual power system acquired in each first unit time in 50 continuous first unit times as first data volume information;
the second data amount information acquisition module is used for determining that the second unit time is the upper time limit value of the value range of the unit time after the end of 50 continuous first unit times, and acquiring the data amount of the operation data of the actual power system acquired in each second unit time in the 50 continuous second unit times as second data amount information; the data quantity of the operation data of the actual power system acquired in the first unit time and the second unit time corresponds to each other one by one according to the acquisition time sequence; that is, the first unit time corresponds to the data amount of the collected operation data of the actual power system of the first second unit time, and so on;
A unit time determining module for determining a unit time using the first data amount information and the second data amount information; wherein, the unit time is obtained by the following formula:
；
；
wherein T represents a unit time; t (T) up And T down Respectively representing an upper limit time value and a lower limit time value of a value range of unit time; t (T) c Representing a compensation time; c (C) i And C j Representing the data quantity of the operation data of the actual power system acquired in the ith first unit time and the jth second unit time corresponding to the ith first unit time;
the data volume real-time acquisition module is used for acquiring the data volume of the operation data of the actual power system acquired in each unit time in real time after the unit time is determined;
the redundant data quantity determining module is used for setting the maximum allowable redundant data quantity of data transmission according to the data quantity of the operation data of the actual power system acquired in each unit time and the maximum transmission data corresponding to the unit time corresponding to the transmission channel index;
and the data cleaning module is used for cleaning the data of the transmission channel when the transmission redundancy data in the transmission channel reaches the maximum allowable redundancy data amount.
Further, the redundant data amount determining module includes:
The data amount information extraction module is used for extracting the data amount of the operation data of the actual power system acquired in each unit time;
the maximum transmission data extraction module is used for extracting the maximum transmission data corresponding to the unit time corresponding to the transmission channel index;
the first parameter factor setting module is used for setting a first parameter factor by utilizing the data quantity of the operation data of the actual power system acquired in each unit time; the first parameter factor is obtained through the following formula:
；
wherein K is 1 Representing a first parameter factor; t represents a unit time; t (T) up And T down Respectively representing an upper limit time value and a lower limit time value of a value range of unit time; n represents the number of unit times that have elapsed for the actual power system run time length after the unit time determination, and n>1；C di Representing the data quantity of the operation data of the actual power system correspondingly acquired in the ith unit time; c (C) p1 Representing the acquired average data quantity corresponding to the first unit time in the first data quantity information; c (C) p2 Representing the acquired average data quantity corresponding to the second unit time in the second data quantity information;
the second parameter factor setting module is used for setting a second parameter factor by using the maximum transmission data corresponding to the unit time corresponding to the transmission channel index; wherein the second parameter factor is obtained by the following formula:
；
；
Wherein K is 2 Representing a second parameter factor; x is X 1 And X 2 Representing a first coefficient and a second coefficient, respectively; n represents the number of unit times that have elapsed for the actual power system run time length after the unit time determination, and n>1；C di Representing the data quantity of the operation data of the actual power system correspondingly acquired in the ith unit time; c (C) dp Representing the total average acquired data volume of the first unit time and the second unit time; c (C) max Representing the maximum transmission data corresponding to the unit time corresponding to the transmission channel index;
the maximum allowable redundant data quantity acquisition module is used for setting the maximum allowable redundant data quantity of data transmission by utilizing the first parameter factor and the second parameter factor, wherein the maximum allowable redundant data quantity is acquired through the following formula:
；
wherein C is r Representing a maximum allowable amount of redundant data; c (C) r0 Theoretical redundant data generated by data transmission of a preset unit transmission data amount is shown by the signal transmission channel, and the unit transmission data amount is 1GB-1.2GB; k (K) 1 Representing a first parameter factor; k (K) 2 Representing a second parameter factor.
Further, the signal transmission unit includes:
the transmission channel construction module is used for acquiring communication link identifiers of the receiving end and the transmitting end based on the Internet of things and constructing a signal transmission channel based on the communication link identifiers;
The transmission channel monitoring module is used for monitoring the transmission risk of the receiving end and the transmitting end in real time and determining the network transmission efficiency of the signal transmission channel;
and the safety transmission module is used for acquiring the data distribution condition of the analog quantity data set and carrying out safety protection on the analog quantity data set based on the data distribution condition.
Further, the transmission channel monitoring module specifically comprises:
acquiring historical transmission success data of each receiving end, analyzing the historical transmission success data to determine the integrity and the safety of the historical transmission success data, and evaluating the safety index of the receiving end according to the integrity and the safety;
acquiring the flow change condition of the network node of each receiving end when transmitting data, and evaluating the importance of each network node in a signal transmission channel according to each flow change condition;
extracting associated communication nodes based on the importance of the network nodes in a signal transmission channel, monitoring link operation parameters among the associated communication nodes in real time, and acquiring link operation quality among the associated communication nodes through the link operation parameters;
and acquiring the single maximum aggregate data quantity of the two corresponding associated communication nodes based on the link operation quality, and calculating the current network transmission efficiency of the signal transmission channel according to the single maximum aggregate data quantity.
Further, the signal transmission unit is further configured to establish a sharing mechanism between the power systems, so as to realize information sharing of operation data of the power systems, and specifically is:
determining signal cache nodes among the power systems according to the constructed signal transmission channels, determining a data retrieval rule among the power systems based on the characteristics of the signal cache nodes, and generating a signal transmission network protocol between the signal cache nodes;
acquiring interaction records among the power systems according to the signal transmission network protocol, generating grid data chains among the power systems based on the interaction records, and extracting features of the grid data chains to obtain first grid features;
and carrying out gradient inversion processing on the first grid characteristics to obtain second grid characteristics, and establishing a data sharing mechanism between the power systems according to the second grid characteristics.
Further, the signal processing unit includes:
the signal receiving module is used for acquiring an analog quantity data set from the signal transmission channel and acquiring analog quantity signals in the analog quantity data set at equal time intervals;
and the secondary signal extraction module is used for determining digital messages corresponding to the analog quantity signals, and each frame of sampling value message in the digital messages corresponds to multiple paths of current/voltage sampling values of the same time section one by one.
Further, the delay characteristic test unit includes:
the test processing module is used for restoring each analog quantity signal based on a time sequence, calculating the phase difference of current/voltage waveforms at each place in the secondary signal loop data based on current/voltage sampling values in the digital message, and calculating the transmission delay of the secondary signal based on the phase difference;
the delay characteristic determining module is used for acquiring phase differences of current/voltage waveforms corresponding to a plurality of periods based on the transmission delay of the secondary signal, calculating and analyzing the transmission delay of the secondary signal of the plurality of periods, and determining the transmission delay characteristic of the secondary signal based on an analysis result;
the display module is used for displaying the processed data and results in real time and displaying the operation history data and trend graphs of the power system;
and the calibration control module is used for carrying out periodical automatic maintenance and calibration on each device and component in the test system based on the high-precision standard instrument and device, wherein the high-precision standard instrument and device are in one-to-one correspondence with each device and component to be maintained and calibrated.
The invention provides another technical scheme, namely a method for testing the secondary signal transmission delay characteristic of a transformer substation, which is based on the system for testing the secondary signal transmission delay characteristic of the transformer substation, and comprises the following steps:
Step one: the method comprises the steps that operation data of an electric power system are collected in real time through a data collection device, when analog signals are received, the received time is accurately recorded, and the received time is used as a comparison standard of secondary signal transmission delay characteristics;
step two: processing and calculating the received data, determining the data as secondary signal loop data of the transformer substation, comparing the phase difference between the secondary signal loop data of the transformer substation and current/voltage waveforms at all positions, and periodically analyzing the phase difference to determine secondary signal transmission delay characteristics of the transformer substation;
step three: and displaying the processed data and results in real time, and simultaneously displaying historical data and trend graphs of the transformer substation, wherein a user selects display contents through an operation interface, and controls the processing process of the display data through the operation interface.
Compared with the prior art, the invention has the beneficial effects that:
1. through carrying out digital conversion on the signals, simulating the running state of an actual power system based on analog quantity, so that subsequent processing and judgment are facilitated, the transmission safety and transmission efficiency of a signal transmission channel are monitored in real time, the integrity and accuracy of the signals are guaranteed, meanwhile, the low delay and reliability of the signal transmission channel are guaranteed, the delay characteristics of secondary signal transmission of a transformer substation are effectively tested and evaluated, powerful data processing and visualization capability are achieved, the test results are displayed in a visual mode, a more accurate and efficient test method is provided, and important technical support is provided for stable operation of the power system, so that the stability and reliability of the power system are improved.
2. The risk terminal and the safety terminal can be effectively distinguished by determining the safety index of the receiving end, the safety and the stability of signal transmission are improved, the current network transmission efficiency of the signal transmission channel is calculated by monitoring the running quality of a link in real time, the loss condition of data in the transmission process is avoided, the stability and the data transmission efficiency are improved, meanwhile, the stability and the high efficiency of the data transmission and the sharing process are ensured, the stable operation of the data transmission is ensured, meanwhile, the subsequently generated data sharing mechanism is more adaptive to the two data sharing mechanisms, and the suitability and the feasibility of the sharing mechanism are improved.
Drawings
Fig. 1 is a block diagram of a secondary signal transmission delay characteristic test system of a transformer substation according to the present invention.
Description of the embodiments
The following description of the embodiments of the present invention will be made clearly and completely with reference to the accompanying drawings, in which it is apparent that the embodiments described are only some embodiments of the present invention, but not all embodiments. All other embodiments, which can be made by those skilled in the art based on the embodiments of the invention without making any inventive effort, are intended to be within the scope of the invention.
In order to solve the technical problems that in the prior art, the transmission of the secondary signal of the transformer substation cannot be monitored in real time, only rough estimation can be generally performed on the transmission delay of the secondary signal, an accurate measurement result cannot be provided, and the stability and reliability of the power system are limited, please refer to fig. 1, the embodiment provides the following technical scheme:
substation secondary signal transmission time delay characteristic test system includes:
the analog quantity generation unit is used for acquiring the operation data of the actual power system, generating analog signals based on the operation data, and classifying according to the simulated characteristics to generate a plurality of analog quantity data sets;
an analog quantity generation unit includes:
the data acquisition module is used for acquiring the operation data of the actual power system in real time, comprising continuous power frequency sinusoidal current/voltage signals in the power grid, and converting the acquired current/voltage signals to obtain corresponding digital quantities;
the analog quantity classification module is used for extracting analog signal characteristics of the corresponding digital quantities, determining analog quantity types of each digital quantity, classifying and integrating operation data of the power system corresponding to the digital quantity based on the analog quantity types, and generating an analog quantity data set of the type;
Specifically, by receiving the raw signal from the sensor and making appropriate adjustments and modifications to the raw signal based on prior art techniques, generally involves: signal amplification, filtering, etc. to eliminate noise, interference, and other adverse effects to ensure signal quality and stability;
the signal transmission unit is used for constructing a signal transmission channel, safely transmitting the plurality of analog quantity data sets based on the signal transmission channel, and monitoring the transmission safety of the analog quantity data sets in real time;
specifically, the data acquisition module includes:
the time information extraction module is used for extracting an upper limit time value and a lower limit time value of a value range of unit time, wherein the value range of the unit time is 1min-3min;
the first data volume information acquisition module is used for determining that the first unit time is the lower time value of the value range of the unit time and acquiring the data volume of the operation data of the actual power system acquired in each first unit time in 50 continuous first unit times as first data volume information;
the second data amount information acquisition module is used for determining that the second unit time is the upper time limit value of the value range of the unit time after the end of 50 continuous first unit times, and acquiring the data amount of the operation data of the actual power system acquired in each second unit time in the 50 continuous second unit times as second data amount information; the data quantity of the operation data of the actual power system acquired in the first unit time and the second unit time corresponds to each other one by one according to the acquisition time sequence; that is, the first unit time corresponds to the data amount of the collected operation data of the actual power system of the first second unit time, and so on;
A unit time determining module for determining a unit time using the first data amount information and the second data amount information; wherein, the unit time is obtained by the following formula:
；
；
wherein T represents a unit time; t (T) up And T down Respectively represent the value ranges of unit timeAn upper time limit value and a lower time limit value; t (T) c Representing a compensation time; c (C) i And C j Representing the data quantity of the operation data of the actual power system acquired in the ith first unit time and the jth second unit time corresponding to the ith first unit time; meanwhile, the unit time is continuously used for subsequent 'real-time monitoring' after one calculation and determination, and repeated calculation is not needed;
the data volume real-time acquisition module is used for acquiring the data volume of the operation data of the actual power system acquired in each unit time in real time after the unit time is determined;
the redundant data quantity determining module is used for setting the maximum allowable redundant data quantity of data transmission according to the data quantity of the operation data of the actual power system acquired in each unit time and the maximum transmission data corresponding to the unit time corresponding to the transmission channel index;
and the data cleaning module is used for cleaning the data of the transmission channel when the transmission redundancy data in the transmission channel reaches the maximum allowable redundancy data amount.
The technical effects of the technical scheme are as follows: dynamic unit time determination: by using the first data amount information and the second data amount information, the module can dynamically determine the unit time so as to adapt to different data amount conditions of the operation data of the power system. This helps to ensure that the data acquisition is adaptive and efficient.
Real-time data acquisition and monitoring: the data volume real-time acquisition module can acquire the data volume of the operation data of the actual power system acquired in each unit time in real time. This helps to monitor the real-time operation of the power system.
Redundant data management: the redundant data amount determining module determines a maximum allowable redundant data amount according to the data amount and the transmission channel index. This helps to reduce unnecessary data transmission and improve data transmission efficiency.
Data cleaning mechanism: when the redundant data in the transmission channel reaches the maximum allowable redundant data quantity, the data cleaning module performs data cleaning so as to ensure the quality of data transmission and reduce the network burden.
In general, the technical effects of the technical scheme of the embodiment include dynamic data acquisition, real-time monitoring, redundant data management and data cleaning, which are helpful for ensuring efficient acquisition and transmission of the operation data of the power system, and improving the data quality and data transmission efficiency. This is important for power system monitoring and data acquisition.
Specifically, the redundant data amount determining module includes:
the data amount information extraction module is used for extracting the data amount of the operation data of the actual power system acquired in each unit time;
the maximum transmission data extraction module is used for extracting the maximum transmission data corresponding to the unit time corresponding to the transmission channel index;
the first parameter factor setting module is used for setting a first parameter factor by utilizing the data quantity of the operation data of the actual power system acquired in each unit time; the first parameter factor is obtained through the following formula:
；
wherein K is 1 Representing a first parameter factor; t represents a unit time; t (T) up And T down Respectively representing an upper limit time value and a lower limit time value of a value range of unit time; n represents the number of unit times that have elapsed for the actual power system run time length after the unit time determination, and n>1；C di Representing the data quantity of the operation data of the actual power system correspondingly acquired in the ith unit time; c (C) p1 Representing the acquired average data quantity corresponding to the first unit time in the first data quantity information; c (C) p2 Representing the acquired average data quantity corresponding to the second unit time in the second data quantity information;
The second parameter factor setting module is used for setting a second parameter factor by using the maximum transmission data corresponding to the unit time corresponding to the transmission channel index; wherein the second parameter factor is obtained by the following formula:
；
；
；
wherein K is 2 Representing a second parameter factor; x is X 1 And X 2 Representing a first coefficient and a second coefficient, respectively; n represents the number of unit times that have elapsed for the actual power system run time length after the unit time determination, and n>1；C di Representing the data quantity of the operation data of the actual power system correspondingly acquired in the ith unit time; c (C) dp Representing the total average acquired data volume of the first unit time and the second unit time; c (C) max Representing the maximum transmission data corresponding to the unit time corresponding to the transmission channel index;
the maximum allowable redundant data quantity acquisition module is used for setting the maximum allowable redundant data quantity of data transmission by utilizing the first parameter factor and the second parameter factor, wherein the maximum allowable redundant data quantity is acquired through the following formula:
；
wherein C is r Representing a maximum allowable amount of redundant data; c (C) r0 Theoretical redundant data generated by data transmission of a preset unit transmission data amount is shown by the signal transmission channel, and the unit transmission data amount is 1GB-1.2GB; k (K) 1 Representing a first parameter factor; k (K) 2 Representing a second parameter factor.
The technical effects of the technical scheme are as follows: dynamic redundant data volume management: by using the first parameter factor and the second parameter factor, the module can dynamically adjust the maximum allowable redundant data amount so as to adapt to different data acquisition conditions and transmission channel indexes. This helps to improve the efficiency and quality of data transmission.
Consider transmission channel performance: by using the second parameter factor and the maximum transmission data, the system may better consider the performance of the transmission channel and adjust the amount of redundant data based on its maximum transmission data. This helps to optimise the data transmission to accommodate different network conditions.
And (3) data transmission quality control: by calculating the maximum allowable redundant data quantity, the system can control the quality of data transmission and ensure the accuracy and the effectiveness of the data transmission.
The network burden is reduced: by optimizing the amount of redundant data, the system can reduce unnecessary data transmission, thereby reducing network load and improving data transmission efficiency.
In general, the technical effects of the above technical solution of the present embodiment include dynamic redundant data size management, consideration of transmission channel performance, data transmission quality control, and reduction of network load, which helps to improve the efficiency, reliability and quality of data transmission. This is very beneficial for data acquisition and transmission systems.
A signal transmission unit comprising:
the transmission channel construction module is used for acquiring communication link identifiers of the receiving end and the transmitting end based on the Internet of things and constructing a signal transmission channel based on the communication link identifiers;
the transmission channel monitoring module is used for monitoring the transmission risk of the receiving end and the transmitting end in real time and determining the network transmission efficiency of the signal transmission channel;
the safety transmission module is used for acquiring the data distribution condition of the analog quantity data set and carrying out safety protection on the analog quantity data set based on the data distribution condition;
the signal processing unit is used for receiving a plurality of analog quantities acquired from the signal transmission channel, extracting signal characteristics, performing correlation calculation and determining the signal characteristics as secondary signal loop data of the transformer substation;
a signal processing unit comprising:
the signal receiving module is used for acquiring an analog quantity data set from the signal transmission channel and acquiring analog quantity signals in the analog quantity data set at equal time intervals;
the secondary signal extraction module is used for determining digital messages corresponding to each analog quantity signal, and each frame of sampling value message in the digital messages corresponds to multiple paths of current/voltage sampling values of the same time section one by one;
Specifically, the digital message is a series of discrete sampling value messages, multiple paths of current/voltage sampling values of the same time section are recorded in each frame of sampling value message, and the analog quantity signal comprises multiple paths of current/voltage signals and time stamps corresponding to the multiple paths of current/voltage signals;
and the delay characteristic testing unit is used for carrying out parameter analysis on the secondary signal loop data of the transformer substation, obtaining an analysis result to determine the secondary signal transmission delay characteristic of the transformer substation, and carrying out visual display on the operation data of the power system.
Specifically, the signal is subjected to digital conversion, the running state of an actual power system is simulated based on analog quantity, so that subsequent processing and judgment are facilitated, the transmission safety and transmission efficiency of a signal transmission channel are monitored in real time, the signal integrity and accuracy are guaranteed, meanwhile, the low delay and reliability of the signal transmission channel are guaranteed, the delay characteristic of secondary signal transmission of a transformer substation is effectively tested and evaluated, powerful data processing and visualization capability are achieved, a test result is visually displayed, a more accurate and efficient test method is provided, and important technical support is provided for stable operation of the power system, so that the stability and reliability of the power system are improved.
In order to solve the technical problems that in the prior art, in order to ensure that the data transmission delay is reduced, the data sharing of the power system cannot be realized, so that the data cannot be timely shared and analyzed, and a large amount of data cannot be effectively processed and analyzed, referring to fig. 1, the embodiment provides the following technical scheme:
the transmission channel monitoring module specifically comprises:
acquiring historical transmission success data of each receiving end, analyzing the historical transmission success data to determine the integrity and the safety of the historical transmission success data, and evaluating the safety index of the receiving end according to the integrity and the safety;
acquiring the flow change condition of the network node of each receiving end when transmitting data, and evaluating the importance of each network node in a signal transmission channel according to each flow change condition;
extracting associated communication nodes based on the importance of the network nodes in a signal transmission channel, monitoring link operation parameters among the associated communication nodes in real time, and acquiring link operation quality among the associated communication nodes through the link operation parameters;
acquiring corresponding single maximum aggregate data quantity of the two associated communication nodes based on the link operation quality, and calculating the current network transmission efficiency of a signal transmission channel according to the single maximum aggregate data quantity;
The signal transmission unit is also used for establishing a sharing mechanism among the power systems to realize information sharing of operation data of the power systems, and specifically comprises the following steps:
determining signal cache nodes among the power systems according to the constructed signal transmission channels, determining a data retrieval rule among the power systems based on the characteristics of the signal cache nodes, and generating a signal transmission network protocol between the signal cache nodes;
acquiring interaction records among the power systems according to the signal transmission network protocol, generating grid data chains among the power systems based on the interaction records, and extracting features of the grid data chains to obtain first grid features;
and carrying out gradient inversion processing on the first grid characteristics to obtain second grid characteristics, and establishing a data sharing mechanism between the power systems according to the second grid characteristics.
Specifically, the risk terminal and the safety terminal can be effectively distinguished by determining the safety index of the receiving end, the safety and the stability of signal transmission are improved, the current network transmission efficiency of the signal transmission channel is calculated by monitoring the running quality of a link in real time, the loss condition of data in the transmission process is avoided, the stability and the data transmission efficiency are improved, meanwhile, the stability and the high efficiency of the data transmission and the sharing process are ensured, the stable operation of the data transmission is ensured, meanwhile, the subsequently generated data sharing mechanism is more adaptive to the two data sharing mechanisms, and the suitability and the feasibility of the sharing mechanism are improved.
A delay characteristic test unit comprising:
the test processing module is used for restoring each analog quantity signal based on a time sequence, calculating the phase difference of current/voltage waveforms at each place in the secondary signal loop data based on current/voltage sampling values in the digital message, and calculating the transmission delay of the secondary signal based on the phase difference;
the delay characteristic determining module is used for acquiring phase differences of current/voltage waveforms corresponding to a plurality of periods based on the transmission delay of the secondary signal, calculating and analyzing the transmission delay of the secondary signal of the plurality of periods, and determining the transmission delay characteristic of the secondary signal based on an analysis result;
the display module is used for displaying the processed data and results in real time and displaying the operation history data and trend graphs of the power system;
and the calibration control module is used for carrying out periodical automatic maintenance and calibration on each device and component in the test system based on the high-precision standard instrument and device, wherein the high-precision standard instrument and device are in one-to-one correspondence with each device and component to be maintained and calibrated.
Specifically, the analog quantity signals are subjected to reduction simulation to secondary signals of different types and different time intervals, the cycle positions are calibrated according to the amplitude values, current/voltage waveforms of a plurality of periods are obtained, the phase difference of the secondary signals of the whole plurality of periods is calculated, delay characteristic information is obtained, interference of the whole cycle delay to delay tests is effectively solved, accordingly, the transmission delay characteristics of the secondary signals are better estimated, a user can select display contents through an operation interface, the processing process of data can be controlled through the operation interface, calibration and maintenance of various devices and components in a test system are automatically completed through a calibration control module, the accuracy and the reliability of test results are guaranteed, manual intervention is reduced, and the working efficiency is improved.
In order to better show the test flow of the secondary signal transmission delay characteristic test system of the transformer substation, the invention provides a secondary signal transmission delay characteristic test method of the transformer substation, which is based on the secondary signal transmission delay characteristic test system of the transformer substation and comprises the following steps:
step one: the method comprises the steps that operation data of an electric power system are collected in real time through a data collection device, when analog signals are received, the received time is accurately recorded, and the received time is used as a comparison standard of secondary signal transmission delay characteristics;
step two: processing and calculating the received data, determining the data as secondary signal loop data of the transformer substation, comparing the phase difference between the secondary signal loop data of the transformer substation and current/voltage waveforms at all positions, and periodically analyzing the phase difference to determine secondary signal transmission delay characteristics of the transformer substation;
step three: and displaying the processed data and results in real time, and simultaneously displaying historical data and trend graphs of the transformer substation, wherein a user selects display contents through an operation interface, and controls the processing process of the display data through the operation interface.
The foregoing is only a preferred embodiment of the present invention, but the scope of the present invention is not limited thereto, and any person skilled in the art, who is within the scope of the present invention, should be covered by the protection scope of the present invention by making equivalents and modifications to the technical solution and the inventive concept thereof.
Claims (6)
1. Substation secondary signal transmission time delay characteristic test system, its characterized in that: comprising the following steps: the device comprises an analog quantity generating unit, a signal transmission unit, a signal processing unit and a delay characteristic testing unit;
the analog quantity generation unit is used for acquiring the operation data of the actual power system, generating analog signals based on the operation data, and classifying according to the simulated characteristics to generate a plurality of analog quantity data sets;
an analog quantity generation unit includes:
the data acquisition module is used for acquiring the operation data of the actual power system in real time, comprising continuous power frequency sinusoidal current/voltage signals in the power grid, and converting the acquired current/voltage signals to obtain corresponding digital quantities;
the analog quantity classification module is used for extracting analog signal characteristics of the corresponding digital quantities, determining analog quantity types of each digital quantity, classifying and integrating operation data of the power system corresponding to the digital quantity based on the analog quantity types, and generating an analog quantity data set of the type;
a data acquisition module comprising:
the time information extraction module is used for extracting an upper limit time value and a lower limit time value of a value range of unit time, wherein the value range of the unit time is 1min-3min;
The first data volume information acquisition module is used for determining that the first unit time is the lower time value of the value range of the unit time and acquiring the data volume of the operation data of the actual power system acquired in each first unit time in 50 continuous first unit times as first data volume information;
the second data amount information acquisition module is used for determining that the second unit time is the upper time limit value of the value range of the unit time after the end of 50 continuous first unit times, and acquiring the data amount of the operation data of the actual power system acquired in each second unit time in the 50 continuous second unit times as second data amount information; the data quantity of the operation data of the actual power system acquired in the first unit time and the second unit time corresponds to each other one by one according to the acquisition time sequence;
a unit time determining module for determining a unit time using the first data amount information and the second data amount information; wherein, the unit time is obtained by the following formula:
；
；
wherein T represents a unit time; t (T) up And T down Respectively representing an upper limit time value and a lower limit time value of a value range of unit time; t (T) c Representing a compensation time; c (C) i And C j Representing the data quantity of the operation data of the actual power system acquired in the ith first unit time and the jth second unit time corresponding to the ith first unit time;
the data volume real-time acquisition module is used for acquiring the data volume of the operation data of the actual power system acquired in each unit time in real time after the unit time is determined;
the redundant data quantity determining module is used for setting the maximum allowable redundant data quantity of data transmission according to the data quantity of the operation data of the actual power system acquired in each unit time and the maximum transmission data corresponding to the unit time corresponding to the transmission channel index;
the data cleaning module is used for cleaning the data of the transmission channel when the transmission redundant data in the transmission channel reaches the maximum allowable redundant data quantity;
the signal transmission unit is used for constructing a signal transmission channel, safely transmitting the plurality of analog quantity data sets based on the signal transmission channel, and monitoring the transmission safety of the analog quantity data sets in real time;
a signal transmission unit comprising:
the transmission channel construction module is used for acquiring communication link identifiers of the receiving end and the transmitting end based on the Internet of things and constructing a signal transmission channel based on the communication link identifiers;
The transmission channel monitoring module is used for monitoring the transmission risk of the receiving end and the transmitting end in real time and determining the network transmission efficiency of the signal transmission channel;
the safety transmission module is used for acquiring the data distribution condition of the analog quantity data set and carrying out safety protection on the analog quantity data set based on the data distribution condition;
the transmission channel monitoring module specifically comprises:
acquiring historical transmission success data of each receiving end, analyzing the historical transmission success data to determine the integrity and the safety of the historical transmission success data, and evaluating the safety index of the receiving end according to the integrity and the safety;
acquiring the flow change condition of the network node of each receiving end when transmitting data, and evaluating the importance of each network node in a signal transmission channel according to each flow change condition;
extracting associated communication nodes based on the importance of the network nodes in a signal transmission channel, monitoring link operation parameters among the associated communication nodes in real time, and acquiring link operation quality among the associated communication nodes through the link operation parameters;
acquiring corresponding single maximum aggregate data quantity of the two associated communication nodes based on the link operation quality, and calculating the current network transmission efficiency of a signal transmission channel according to the single maximum aggregate data quantity;
The signal processing unit is used for receiving a plurality of analog quantities acquired from the signal transmission channel, extracting signal characteristics, performing correlation calculation and determining the signal characteristics as secondary signal loop data of the transformer substation;
and the delay characteristic testing unit is used for carrying out parameter analysis on the secondary signal loop data of the transformer substation, obtaining an analysis result to determine the secondary signal transmission delay characteristic of the transformer substation, and carrying out visual display on the operation data of the power system.
2. The substation secondary signal transmission delay characteristic test system according to claim 1, wherein: a redundant data amount determination module comprising:
the data amount information extraction module is used for extracting the data amount of the operation data of the actual power system acquired in each unit time;
the maximum transmission data extraction module is used for extracting the maximum transmission data corresponding to the unit time corresponding to the transmission channel index;
the first parameter factor setting module is used for setting a first parameter factor by utilizing the data quantity of the operation data of the actual power system acquired in each unit time; the first parameter factor is obtained through the following formula:
；
wherein K is 1 Representing a first parameter factor; t represents a unit time; t (T) up And T down Respectively representing an upper limit time value and a lower limit time value of a value range of unit time; n represents the number of unit times that have elapsed for the actual power system run time length after the unit time determination, and n>1；C di Representing the data quantity of the operation data of the actual power system correspondingly acquired in the ith unit time; c (C) p1 Representing the acquired average data quantity corresponding to the first unit time in the first data quantity information; c (C) p2 Representing the acquired average data quantity corresponding to the second unit time in the second data quantity information;
the second parameter factor setting module is used for setting a second parameter factor by using the maximum transmission data corresponding to the unit time corresponding to the transmission channel index; wherein the second parameter factor is obtained by the following formula:
；
；
；
wherein K is 2 Representing a second parameter factor; x is X 1 And X 2 Representing a first coefficient and a second coefficient, respectively; n represents the number of unit times that have elapsed for the actual power system run time length after the unit time determination, and n>1；C di Represents the ithThe unit time corresponds to the data quantity of the collected operation data of the actual power system; c (C) dp Representing the total average acquired data volume of the first unit time and the second unit time; c (C) max Representing the maximum transmission data corresponding to the unit time corresponding to the transmission channel index;
the maximum allowable redundant data quantity acquisition module is used for setting the maximum allowable redundant data quantity of data transmission by utilizing the first parameter factor and the second parameter factor, wherein the maximum allowable redundant data quantity is acquired through the following formula:
；
wherein C is r Representing a maximum allowable amount of redundant data; c (C) r0 Theoretical redundant data generated by data transmission of a preset unit transmission data amount is shown by the signal transmission channel, and the unit transmission data amount is 1GB-1.2GB; k (K) 1 Representing a first parameter factor; k (K) 2 Representing a second parameter factor.
3. The substation secondary signal transmission delay characteristic test system according to claim 2, wherein: the signal transmission unit is also used for establishing a sharing mechanism among the power systems to realize information sharing of operation data of the power systems, and specifically comprises the following steps:
determining signal cache nodes among the power systems according to the constructed signal transmission channels, determining a data retrieval rule among the power systems based on the characteristics of the signal cache nodes, and generating a signal transmission network protocol between the signal cache nodes;
acquiring interaction records among the power systems according to the signal transmission network protocol, generating grid data chains among the power systems based on the interaction records, and extracting features of the grid data chains to obtain first grid features;
And carrying out gradient inversion processing on the first grid characteristics to obtain second grid characteristics, and establishing a data sharing mechanism between the power systems according to the second grid characteristics.
4. A substation secondary signal transmission delay characteristic test system as claimed in claim 3, wherein: a signal processing unit comprising:
the signal receiving module is used for acquiring an analog quantity data set from the signal transmission channel and acquiring analog quantity signals in the analog quantity data set at equal time intervals;
and the secondary signal extraction module is used for determining digital messages corresponding to the analog quantity signals, and each frame of sampling value message in the digital messages corresponds to multiple paths of current/voltage sampling values of the same time section one by one.
5. The substation secondary signal transmission delay characteristic test system according to claim 4, wherein: a delay characteristic test unit comprising:
the test processing module is used for restoring each analog quantity signal based on a time sequence, calculating the phase difference of current/voltage waveforms at each place in the secondary signal loop data based on current/voltage sampling values in the digital message, and calculating the transmission delay of the secondary signal based on the phase difference;
The delay characteristic determining module is used for acquiring phase differences of current/voltage waveforms corresponding to a plurality of periods based on the transmission delay of the secondary signal, calculating and analyzing the transmission delay of the secondary signal of the plurality of periods, and determining the transmission delay characteristic of the secondary signal based on an analysis result;
the display module is used for displaying the processed data and results in real time and displaying the operation history data and trend graphs of the power system;
and the calibration control module is used for carrying out periodical automatic maintenance and calibration on each device and component in the test system based on the high-precision standard instrument and device, wherein the high-precision standard instrument and device are in one-to-one correspondence with each device and component to be maintained and calibrated.
6. The substation secondary signal transmission delay characteristic test method is based on the substation secondary signal transmission delay characteristic test system described in claim 5, and is characterized in that: the method comprises the following steps:
step one: the method comprises the steps that operation data of an electric power system are collected in real time through a data collection device, when analog signals are received, the received time is accurately recorded, and the received time is used as a comparison standard of secondary signal transmission delay characteristics;
step two: processing and calculating the received data, determining the data as secondary signal loop data of the transformer substation, comparing the phase difference between the secondary signal loop data of the transformer substation and current/voltage waveforms at all positions, and periodically analyzing the phase difference to determine secondary signal transmission delay characteristics of the transformer substation;
Step three: and displaying the processed data and results in real time, and simultaneously displaying historical data and trend graphs of the transformer substation, wherein a user selects display contents through an operation interface, and controls the processing process of the display data through the operation interface.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202410073656.XA CN117596190B (en) | 2024-01-18 | 2024-01-18 | System and method for testing secondary signal transmission delay characteristics of transformer substation |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202410073656.XA CN117596190B (en) | 2024-01-18 | 2024-01-18 | System and method for testing secondary signal transmission delay characteristics of transformer substation |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN117596190A CN117596190A (en) | 2024-02-23 |
| CN117596190B true CN117596190B (en) | 2024-03-19 |
Family
ID=89911935
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202410073656.XA Active CN117596190B (en) | 2024-01-18 | 2024-01-18 | System and method for testing secondary signal transmission delay characteristics of transformer substation |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN117596190B (en) |
Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103777104A (en) * | 2014-02-24 | 2014-05-07 | 国家电网公司 | Time-delay characteristic testing device and method of digital substation secondary signal transmission system |
| CN104779702A (en) * | 2015-04-23 | 2015-07-15 | 国网四川省电力公司电力科学研究院 | Intelligent transformer station secondary equipment state data warning displaying method |
| CN111460612A (en) * | 2020-03-03 | 2020-07-28 | 国网河南省电力公司电力科学研究院 | Real-time simulation operation method and system for primary equipment and secondary equipment of transformer substation |
| CN112910089A (en) * | 2021-01-25 | 2021-06-04 | 国网山东省电力公司青岛供电公司 | Transformer substation secondary equipment fault logic visualization method and system |
| CN114095396A (en) * | 2021-11-15 | 2022-02-25 | 中国电力科学研究院有限公司 | Intelligent substation data communication detection method, system, equipment and storage medium |
| EP4068551A1 (en) * | 2021-03-29 | 2022-10-05 | Siemens Aktiengesellschaft | System and method for predicting failure in a power system in real-time |
Family Cites Families (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CA3024175A1 (en) * | 2016-06-01 | 2017-12-07 | Isco International, Llc | Method and apparatus for performing signal conditioning to mitigate interference detected in a communication system |
-
2024
- 2024-01-18 CN CN202410073656.XA patent/CN117596190B/en active Active
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103777104A (en) * | 2014-02-24 | 2014-05-07 | 国家电网公司 | Time-delay characteristic testing device and method of digital substation secondary signal transmission system |
| CN104779702A (en) * | 2015-04-23 | 2015-07-15 | 国网四川省电力公司电力科学研究院 | Intelligent transformer station secondary equipment state data warning displaying method |
| CN111460612A (en) * | 2020-03-03 | 2020-07-28 | 国网河南省电力公司电力科学研究院 | Real-time simulation operation method and system for primary equipment and secondary equipment of transformer substation |
| CN112910089A (en) * | 2021-01-25 | 2021-06-04 | 国网山东省电力公司青岛供电公司 | Transformer substation secondary equipment fault logic visualization method and system |
| EP4068551A1 (en) * | 2021-03-29 | 2022-10-05 | Siemens Aktiengesellschaft | System and method for predicting failure in a power system in real-time |
| CN114095396A (en) * | 2021-11-15 | 2022-02-25 | 中国电力科学研究院有限公司 | Intelligent substation data communication detection method, system, equipment and storage medium |
Non-Patent Citations (1)
| Title |
|---|
| 黄灿 ; 肖驰夫 ; 方毅 ; 郑建勇 ; .智能变电站中采样值传输延时的处理.电网技术.2011,(第01期),全文. * |
Also Published As
| Publication number | Publication date |
|---|---|
| CN117596190A (en) | 2024-02-23 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN111131417B (en) | Metering, monitoring and analyzing system and method for transformer substation | |
| CN107886171B (en) | PMU data-based breaker state online diagnosis method and system | |
| CN111382789B (en) | Power load identification method and system based on machine learning | |
| CN111669123B (en) | Method and device for fault diagnosis of photovoltaic string | |
| CN106803797A (en) | A kind of VoIP speech quality method for objectively evaluating based on network parameter | |
| CN115170000A (en) | Remote monitoring method and system based on electric energy meter communication module | |
| CN115566804B (en) | Electric power monitoring system based on distributed optical fiber sensing technology | |
| CN107741577A (en) | A kind of Source of Gateway Meter degree of accuracy on-line monitoring and analysis method and system | |
| CN106405280B (en) | A kind of intelligent substation on-line monitoring parameter trend method for early warning | |
| CN116800199A (en) | Distributed photovoltaic operation electric energy quality monitoring and analyzing method | |
| KR101953558B1 (en) | Apparatus and Method for Fault Management of Smart Devices | |
| CN116823226A (en) | Electric power district fault monitoring system based on big data | |
| KR100576511B1 (en) | System and method for calculating real-time voltage stability risk index in power system using time series data | |
| CN115792457A (en) | Method and system for diagnosing and analyzing station acquisition fault based on edge calculation | |
| CN113469488B (en) | Online diagnosis and analysis system for topological structure of power distribution network equipment | |
| CN115113125A (en) | Correction system of multichannel arbitrary waveform generator | |
| CN113027658B (en) | Real-time state evaluation method for water turbine runner and application thereof | |
| CN117596190B (en) | System and method for testing secondary signal transmission delay characteristics of transformer substation | |
| CN113153262A (en) | Offshore oilfield accessible capacity evaluation method based on cable thermal characteristics | |
| CN116128690B (en) | Carbon emission cost value calculation method, device, equipment and medium | |
| CN112162226B (en) | Measurement characteristic separation testing device and method and terminal equipment | |
| CN112486096A (en) | Machine tool operation state monitoring method | |
| CN115566997B (en) | Photovoltaic module attenuation test system and method for air compression station | |
| CN114167345B (en) | Method for evaluating accuracy of power quality detection device | |
| CN109556649B (en) | Signal acquisition monitoring method of intelligent sensor |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| GR01 | Patent grant | ||
| GR01 | Patent grant |