CN114465214B - Fault disconnection configuration method based on 5G communication technology - Google Patents
Fault disconnection configuration method based on 5G communication technology Download PDFInfo
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- CN114465214B CN114465214B CN202210266299.XA CN202210266299A CN114465214B CN 114465214 B CN114465214 B CN 114465214B CN 202210266299 A CN202210266299 A CN 202210266299A CN 114465214 B CN114465214 B CN 114465214B
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- 238000005516 engineering process Methods 0.000 title claims abstract description 15
- 230000009191 jumping Effects 0.000 claims abstract description 7
- 238000012544 monitoring process Methods 0.000 claims abstract description 4
- 230000002159 abnormal effect Effects 0.000 claims description 15
- 238000004140 cleaning Methods 0.000 claims description 6
- 238000012216 screening Methods 0.000 claims description 6
- 238000000926 separation method Methods 0.000 claims description 4
- 230000005856 abnormality Effects 0.000 claims description 3
- 238000007621 cluster analysis Methods 0.000 claims description 3
- 238000001514 detection method Methods 0.000 claims description 3
- 238000005457 optimization Methods 0.000 claims description 3
- 230000007547 defect Effects 0.000 abstract description 2
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Classifications
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02H—EMERGENCY PROTECTIVE CIRCUIT ARRANGEMENTS
- H02H7/00—Emergency protective circuit arrangements specially adapted for specific types of electric machines or apparatus or for sectionalised protection of cable or line systems, and effecting automatic switching in the event of an undesired change from normal working conditions
- H02H7/26—Sectionalised protection of cable or line systems, e.g. for disconnecting a section on which a short-circuit, earth fault, or arc discharge has occured
- H02H7/261—Sectionalised protection of cable or line systems, e.g. for disconnecting a section on which a short-circuit, earth fault, or arc discharge has occured involving signal transmission between at least two stations
- H02H7/262—Sectionalised protection of cable or line systems, e.g. for disconnecting a section on which a short-circuit, earth fault, or arc discharge has occured involving signal transmission between at least two stations involving transmissions of switching or blocking orders
-
- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02H—EMERGENCY PROTECTIVE CIRCUIT ARRANGEMENTS
- H02H3/00—Emergency protective circuit arrangements for automatic disconnection directly responsive to an undesired change from normal electric working condition with or without subsequent reconnection ; integrated protection
- H02H3/02—Details
- H02H3/06—Details with automatic reconnection
- H02H3/063—Details concerning the co-operation of many similar arrangements, e.g. in a network
-
- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02H—EMERGENCY PROTECTIVE CIRCUIT ARRANGEMENTS
- H02H3/00—Emergency protective circuit arrangements for automatic disconnection directly responsive to an undesired change from normal electric working condition with or without subsequent reconnection ; integrated protection
- H02H3/02—Details
- H02H3/06—Details with automatic reconnection
- H02H3/066—Reconnection being a consequence of eliminating the fault which caused disconnection
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- Remote Monitoring And Control Of Power-Distribution Networks (AREA)
Abstract
The invention discloses a fault disconnection configuration device and a fault disconnection configuration method based on a 5G communication technology, which solve the defects of the prior art, and the fault disconnection configuration method comprises the following steps: step 1, monitoring the state of a power grid system side, if the system side works normally, continuing to monitor, and if the system side fails, jumping to step 2; step 2, the fault disconnecting device at the system side acts to disconnect a switch at the system side, a pair of tripping contact points are opened to a 5G transmitting module at the system side, and then the 5G transmitting module transmits tripping control signals to a 5G receiving module at the small power supply side through a 5G network; step 3, after receiving the tripping control signal, the 5G receiving module at the small power supply side opens a pair of tripping contact points to be connected into the small power supply side protection device; and 4, the small power supply protection device turns off the small power supply side switch.
Description
Technical Field
The invention relates to a small power line disconnection technology, in particular to a fault disconnection configuration method based on a 5G communication technology.
Background
With the strong advancement of novel power systems, large-scale new energy sources are connected to the grid from the 35 kilovolt (10 kilovolts) side of a 110 kilovolt-class transformer substation. In order to ensure that the main power supply line of the 110kV transformer substation can be successfully overlapped when in fault, the grid-connected small power supply line is required to be disconnected before the reclosing of the 110kV line switch. According to the protection configuration mode of the current system side and the power supply side, a fault disconnection device is configured on the small power supply side, and the fault disconnection device is also configured in a 110 kilovolt transformer substation to serve as backup protection of the small power supply side disconnection device.
The existing fault disconnection device has the following problems:
1) The system side fault disconnection device directly cuts off a substation side small power supply internet access line switch after action, and under the condition of more internet access lines, the public load is connected in a T mode, and the public load is powered off after disconnection of the lines.
2) Under the traditional configuration, the system side fault disconnection device can trip the system side small power supply line switch, and is unfavorable for the recovery of the small power supply to be connected with the power network. And after the main 110kV line is powered back, the small power supply side cannot directly contact with the system side, so that the automatic switching-on of the small power supply is realized.
Under the condition of large-scale new energy grid connection, the small power supply is wide in distribution and scattered in position, and the communication difficulty and the high cost of the system side protection device and the small power supply side protection are realized through the traditional communication means such as optical fibers, network cables and the like.
Disclosure of Invention
The invention aims to overcome the defects in the prior art and provides a fault disconnection configuration method based on a 5G communication technology.
The invention aims at realizing the following technical scheme:
a fault disconnection configuration method based on a 5G communication technology comprises the following steps:
Step 1, monitoring the state of a power grid system side, if the system side works normally, continuing to monitor, and if the system side fails, jumping to step 2;
Step 2, the fault disconnection device at the system side acts to disconnect a switch at the system side, a pair of tripping contact points are opened to a 5G sending module at the system side, and then the 5G sending module sends tripping control signals to a 5G receiving module at the small power supply side through a 5G network;
Step 3, after receiving the tripping control signal, the 5G receiving module at the small power supply side opens a pair of tripping contact points to be connected into the small power supply side protection device;
And 4, the small power supply protection device turns off the small power supply side switch.
Preferably, the fault disconnection configuration method based on the 5G communication technology further includes a step of recovering switching-on, specifically:
Step 5, detecting the state of the power grid system side, if the system side fault is relieved, jumping to step 6, and if the system side is still in the fault state, continuing to keep detection;
Step 7, the fault disconnection device at the system side acts to overlap the switch at the system side, a pair of tripping contact points are opened to the 5G sending module at the system side, and then the 5G sending module sends an overlapping control signal to the 5G receiving module at the small power supply side through a 5G network;
step 8, after receiving the coincidence control signal, the 5G receiving module of the small power supply side opens a pair of coincidence joints to be connected into the small power supply side protection device;
And 9, overlapping the small power side switch by the small power protection device.
Preferably, a first timing unit is arranged on the system side, a second timing unit is arranged on the small power supply side, and the first timing unit records the event time when the switch on the system side is turned off or is overlapped; when the small power side switch is turned off or overlapped, the second timing unit records the event time, the time difference recorded by the first timing unit and the second timing unit is the response delay time, all delay times are recorded, and the delay time is analyzed: clustering all the delay times, wherein the dimension of the clustering comprises the type of the delay time and the natural time interval of the occurrence delay time, a plurality of clustering areas are formed after cluster analysis, and each clustering center is the optimal delay time of the delay time; for a new delay time, judging whether the delay time is in a certain cluster range, if not, judging that the new delay time is abnormal, if so, judging whether the type of the delay time and the natural time interval of the occurrence delay time are the same as the type of the optimal delay time corresponding to the cluster center and the natural time of the occurrence delay time, if so, judging that the new delay time is normal, and if not, judging that the new delay time is abnormal.
In the traditional fault disconnection, due to the lack of recording the time for switching off or overlapping the system side or small power supply side switch, even if the system side or small power supply side switch is normally switched off or overlapping, the time difference cannot be known, and the possible fault tendency cannot be judged, so that the design of utilizing the clusters in the design can be used for classifying and judging the delay time for switching off or overlapping the system side or small power supply side switch, so that whether the delay time is normal can be quickly known, and early warning can be realized for equipment with fault tendency.
Preferably, the fault separation configuration method based on the 5G communication technology further comprises a method for optimizing the clustering, the optimizing method comprises the steps of cleaning data and optimizing the clustering method, and the data cleaning process specifically comprises the following steps:
after the clustering is completed, searching for delay time outside the clustering area, and defining all the time outside the clustering area as abnormal delay time;
the optimization process of the clustering method specifically comprises the following steps:
Collecting all abnormal delay time, judging whether the delay time of screening the abnormality is misjudgment or not by related personnel, marking the abnormal delay time of screening the misjudgment by the related personnel as normal delay time, re-clustering all normal delay time, judging that the clustering is completed if the number of delay time outside a re-clustering area after the re-clustering is smaller than or equal to a set threshold value, adjusting the dimension number of the clustering or adjusting the Euclidean distance of the clustering if the number of delay time outside the re-clustering area after the re-clustering is larger than the set threshold value until the number of delay time outside the re-clustering area after the clustering is smaller than or equal to the set threshold value or the maximum clustering times are reached, and completing the clustering.
Preferably, if a certain delay time is within at least two cluster ranges, the type of the delay time and a natural time interval in which the delay time occurs are acquired, the delay time is classified into a cluster range of the optimal delay time having the same type of the delay time and the natural time interval in which the delay time occurs, and if the type of the delay time and the natural time interval in which the delay time occurs are the same as the type of the delay time of the optimal delay time within at least two cluster ranges, the delay time is classified into a cluster range closest to the euclidean distance of the cluster center.
The beneficial effects of the invention are as follows: the fault splitting device with the 5G transmitting module is configured on the system side, the 5G receiving module is configured by each small power supply side protection, and the fault splitting device can be not configured on the small power supply side. After the system side fault disconnection device judges that the system side has faults, the device acts to open a pair of tripping contacts to the 5G sending module. The 5G transmitting module transmits a "trip" signal to the 5G receiving module disposed at the small power source side. After receiving the signal, the 5G receiving module at the small power supply side opens a pair of tripping contact to be connected into the small power supply side protection device, so as to realize that the system side fault disconnection device directly cuts off the line switch at the power supply side.
After the reclosing of the main power supply line at the system side is successful and the power transmission is recovered, the system side fault disconnection device adopts the same method to open a command of 'allowing coincidence' to the small power supply side, so that the small power supply is automatically put into recovery grid-connected power transmission after the fault.
Drawings
Fig. 1 is a schematic block diagram of a circuit of the present invention.
Detailed Description
The invention is further described below with reference to the drawings and examples.
Examples:
as shown in fig. 1, a fault separation configuration method based on a 5G communication technology includes the following steps:
Step 1, monitoring the state of a power grid system side, if the system side works normally, continuing to monitor, and if the system side fails, jumping to step 2;
Step 2, the fault disconnecting device at the system side acts to disconnect a switch at the system side, a pair of tripping contact points are opened to a 5G transmitting module at the system side, and then the 5G transmitting module transmits tripping control signals to a 5G receiving module at the small power supply side through a 5G network;
Step 3, after receiving the tripping control signal, the 5G receiving module at the small power supply side opens a pair of tripping contact points to be connected into the small power supply side protection device;
And 4, the small power supply protection device turns off the small power supply side switch.
The fault disconnection configuration method based on the 5G communication technology further comprises a restoration switching-on step, and specifically comprises the following steps:
Step 5, detecting the state of the power grid system side, if the system side fault is relieved, jumping to step 6, and if the system side is still in the fault state, continuing to keep detection;
Step 7, the fault disconnecting device at the system side acts to overlap the switch at the system side, a pair of tripping contact points are opened to the 5G transmitting module at the system side, and then the 5G transmitting module transmits an overlapping control signal to the 5G receiving module at the small power supply side through a 5G network;
step 8, after receiving the coincidence control signal, the 5G receiving module of the small power supply side opens a pair of coincidence joints to be connected into the small power supply side protection device;
And 9, overlapping the small power side switch by the small power protection device.
The system side is provided with a first timing unit, the small power supply side is provided with a second timing unit, and when the switch on the system side is disconnected or overlapped, the first timing unit records the event time; when the small power side switch is turned off or overlapped, the second timing unit records the event time, the time difference recorded by the first timing unit and the second timing unit is the response delay time, all delay times are recorded, and the delay time is analyzed: clustering all the delay times, wherein the dimension of the clustering comprises the type of the delay time and the natural time interval of the occurrence delay time, a plurality of clustering areas are formed after cluster analysis, and each clustering center is the optimal delay time of the delay time; for a new delay time, judging whether the delay time is in a certain cluster range, if not, judging that the new delay time is abnormal, if so, judging whether the type of the delay time and the natural time interval of the occurrence delay time are the same as the type of the optimal delay time corresponding to the cluster center and the natural time of the occurrence delay time, if so, judging that the new delay time is normal, and if not, judging that the new delay time is abnormal.
In the traditional fault disconnection, due to the lack of recording the time for switching off or overlapping the system side or small power supply side switch, even if the system side or small power supply side switch is normally switched off or overlapping, the time difference cannot be known, and the possible fault tendency cannot be judged, so that the design of utilizing the clusters in the design can be used for classifying and judging the delay time for switching off or overlapping the system side or small power supply side switch, so that whether the delay time is normal can be quickly known, and early warning can be realized for equipment with fault tendency.
The fault disconnection configuration method based on the 5G communication technology also comprises a method for optimizing clusters, wherein the optimizing method comprises the steps of cleaning data and optimizing a clustering method, and the data cleaning process specifically comprises the following steps:
after the clustering is completed, searching for delay time outside the clustering area, and defining all the time outside the clustering area as abnormal delay time;
the optimization process of the clustering method specifically comprises the following steps:
Collecting all abnormal delay time, judging whether the delay time of screening the abnormality is misjudgment or not by related personnel, marking the abnormal delay time of screening the misjudgment by the related personnel as normal delay time, re-clustering all normal delay time, judging that the clustering is completed if the number of delay time outside a re-clustering area after the re-clustering is smaller than or equal to a set threshold value, adjusting the dimension number of the clustering or adjusting the Euclidean distance of the clustering if the number of delay time outside the re-clustering area after the re-clustering is larger than the set threshold value until the number of delay time outside the re-clustering area after the clustering is smaller than or equal to the set threshold value or the maximum clustering times are reached, and completing the clustering.
If a certain delay time is in at least two clustering ranges, the type of the delay time and a natural time interval in which the delay time occurs are acquired, the delay time is classified into a clustering range of the optimal delay time of the natural time interval in which the delay time occurs and the type of the delay time is the same as the type of the delay time of the optimal delay time in at least two clustering ranges, and if the delay time is the same as the natural time interval in which the delay time occurs, the delay time is classified into a clustering range closest to the Euclidean distance of the clustering center.
The fault splitting device with the 5G transmitting module is configured on the system side, the 5G receiving module is configured by each small power supply side protection, and the fault splitting device can be not configured on the small power supply side. After the system side fault disconnection device judges that the system side has faults, the device acts to open a pair of tripping contacts to the 5G sending module. The 5G transmitting module transmits a "trip" signal to the 5G receiving module disposed at the small power source side. After receiving the signal, the 5G receiving module at the small power supply side opens a pair of tripping contact to be connected into the small power supply side protection device, so as to realize that the system side fault disconnection device directly cuts off the line switch at the power supply side.
After the reclosing of the main power supply line at the system side is successful and the power transmission is recovered, the system side fault disconnection device adopts the same method to open a command of 'allowing coincidence' to the small power supply side, so that the small power supply is automatically put into recovery grid-connected power transmission after the fault.
The above-described embodiment is only a preferred embodiment of the present invention, and is not limited in any way, and other variations and modifications may be made without departing from the technical aspects set forth in the claims.
Claims (4)
1. The fault disconnection configuration method based on the 5G communication technology is characterized by comprising the following steps of:
Step 1, monitoring the state of a power grid system side, if the system side works normally, continuing to monitor, and if the system side fails, jumping to step 2;
Step 2, the fault disconnection device at the system side acts to disconnect a switch at the system side, a pair of tripping contact points are opened to a 5G sending module at the system side, and then the 5G sending module sends tripping control signals to a 5G receiving module at the small power supply side through a 5G network;
Step 3, after receiving the tripping control signal, the 5G receiving module at the small power supply side opens a pair of tripping contact points to be connected into the small power supply side protection device;
step 4, the small power supply protection device turns off the small power supply side switch;
The system side is provided with a first timing unit, the small power supply side is provided with a second timing unit, and when the switch on the system side is disconnected or overlapped, the first timing unit records the event time; when the small power side switch is turned off or overlapped, the second timing unit records the event time, the time difference recorded by the first timing unit and the second timing unit is the response delay time, all delay times are recorded, and the delay time is analyzed: clustering all the delay times, wherein the dimension of the clustering comprises the type of the delay time and the natural time interval of the occurrence delay time, a plurality of clustering areas are formed after cluster analysis, and each clustering center is the optimal delay time of the delay time; for a new delay time, judging whether the delay time is in a certain cluster range, if not, judging that the new delay time is abnormal, if so, judging whether the type of the delay time and the natural time interval of the occurrence delay time are the same as the type of the optimal delay time corresponding to the cluster center and the natural time of the occurrence delay time, if so, judging that the new delay time is normal, and if not, judging that the new delay time is abnormal.
2. The fault separation configuration method based on the 5G communication technology according to claim 1, further comprising a step of recovering switching-on, specifically:
Step 5, detecting the state of the power grid system side, if the system side fault is relieved, jumping to step 6, and if the system side is still in the fault state, continuing to keep detection;
Step 6, the fault disconnection device at the system side acts to overlap the switch at the system side, a pair of tripping contact points are opened to the 5G sending module at the system side, and then the 5G sending module sends an overlapping control signal to the 5G receiving module at the small power supply side through a 5G network;
Step 7, after receiving the coincidence control signal, the 5G receiving module at the small power supply side opens a pair of coincidence joints to be connected into the small power supply side protection device;
and 8, overlapping the small power side switch by the small power protection device.
3. The fault separation configuration method based on the 5G communication technology according to claim 1, further comprising a method for optimizing a cluster, wherein the optimizing method comprises a data cleaning and a clustering method optimizing, and the data cleaning process specifically comprises the following steps:
after the clustering is completed, searching for delay time outside the clustering area, and defining all the time outside the clustering area as abnormal delay time;
the optimization process of the clustering method specifically comprises the following steps:
Collecting all abnormal delay time, judging whether the delay time of screening the abnormality is misjudgment or not by related personnel, marking the abnormal delay time of screening the misjudgment by the related personnel as normal delay time, re-clustering all normal delay time, judging that the clustering is completed if the number of delay time outside a re-clustering area after the re-clustering is smaller than or equal to a set threshold value, adjusting the dimension number of the clustering or adjusting the Euclidean distance of the clustering if the number of delay time outside the re-clustering area after the re-clustering is larger than the set threshold value until the number of delay time outside the re-clustering area after the clustering is smaller than or equal to the set threshold value or the maximum clustering times are reached, and completing the clustering.
4. The fault-disconnection arrangement method according to claim 1 or 3, wherein if a certain delay time is within at least two cluster ranges, the type of the delay time and a natural time zone in which the delay time occurs are acquired, the delay time is classified into a cluster range of an optimal delay time having the same type of the delay time and the natural time zone in which the delay time occurs, and if the type of the delay time and the natural time zone in which the delay time occurs are the same as each other in at least two cluster ranges, the delay time is classified into a cluster range closest to a cluster center euclidean distance.
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