CN115642707B - Distributed feeder network power distribution terminal logic unification method and power distribution terminal system - Google Patents
Distributed feeder network power distribution terminal logic unification method and power distribution terminal system Download PDFInfo
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- CN115642707B CN115642707B CN202211462659.XA CN202211462659A CN115642707B CN 115642707 B CN115642707 B CN 115642707B CN 202211462659 A CN202211462659 A CN 202211462659A CN 115642707 B CN115642707 B CN 115642707B
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y04—INFORMATION OR COMMUNICATION TECHNOLOGIES HAVING AN IMPACT ON OTHER TECHNOLOGY AREAS
- Y04S—SYSTEMS INTEGRATING TECHNOLOGIES RELATED TO POWER NETWORK OPERATION, COMMUNICATION OR INFORMATION TECHNOLOGIES FOR IMPROVING THE ELECTRICAL POWER GENERATION, TRANSMISSION, DISTRIBUTION, MANAGEMENT OR USAGE, i.e. SMART GRIDS
- Y04S10/00—Systems supporting electrical power generation, transmission or distribution
- Y04S10/20—Systems supporting electrical power generation, transmission or distribution using protection elements, arrangements or systems
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y04—INFORMATION OR COMMUNICATION TECHNOLOGIES HAVING AN IMPACT ON OTHER TECHNOLOGY AREAS
- Y04S—SYSTEMS INTEGRATING TECHNOLOGIES RELATED TO POWER NETWORK OPERATION, COMMUNICATION OR INFORMATION TECHNOLOGIES FOR IMPROVING THE ELECTRICAL POWER GENERATION, TRANSMISSION, DISTRIBUTION, MANAGEMENT OR USAGE, i.e. SMART GRIDS
- Y04S10/00—Systems supporting electrical power generation, transmission or distribution
- Y04S10/50—Systems or methods supporting the power network operation or management, involving a certain degree of interaction with the load-side end user applications
- Y04S10/52—Outage or fault management, e.g. fault detection or location
Abstract
The invention relates to the technical field of distributed feeder network fault protection, and provides a distributed feeder network power distribution terminal logic unification method and a distributed feeder network power distribution terminal system, wherein the distributed feeder network power distribution terminal logic unification method comprises the following steps: when a communication interruption point occurs or disappears in the distributed feeder network, the fault power distribution terminal changes self interactive parameters based on self serial numbers; each power distribution terminal in the distributed feeder network sends own interaction parameters to the power distribution terminals connected with the power distribution terminal at intervals of a first preset time, each power distribution terminal changes own interaction parameters according to the received interaction parameters after receiving the interaction parameters sent by the power distribution terminals connected with the power distribution terminal, until all the power distribution terminals in the distributed feeder network receive the interaction parameters within a second preset time, and the protection logic of each power distribution terminal is determined based on the own interaction parameters of the power distribution terminals. So that the protection logic of all the power distribution terminals is kept consistent.
Description
Technical Field
The invention relates to the technical field of distributed feeder network fault protection, in particular to a distributed feeder network power distribution terminal logic unifying method and a power distribution terminal system.
Background
In the technical field of distributed feeder network fault protection, distributed feeder automatic protection logic is protection logic which does not depend on a master station, achieves quick positioning and removal of faults and recovers power supply of a non-fault area through information interaction between adjacent power distribution terminals, and the protection logic has high requirements on communication quality between the power distribution terminals.
When the power distribution terminal judges that a communication interruption point occurs in the distributed feeder network topology, the distributed feeder automation logic is not applicable any more and needs to be converted into other protection logic to operate. However, in the network topology, only the directly adjacent power distribution terminals have mutual communication, so that only the power distribution terminal directly connected to the communication interruption point can determine the communication interruption, and other power distribution terminals not directly connected to the communication interruption point cannot determine the communication interruption, and the distributed feeder automation logic can still be kept to continue to operate, so that two protection logics are simultaneously operated in the same network topology environment, thereby causing a barrier to the normal operation of the network, and being not beneficial to positioning analysis and playback of faults.
Disclosure of Invention
In view of this, the embodiment of the present invention provides a method for unifying power distribution terminal logics of a distributed feeder network, so that protection logics of all power distribution terminals are kept consistent in the same network topology environment.
In order to achieve the purpose, the invention adopts the following technical scheme:
in a first aspect, an embodiment of the present invention provides a method for logically unifying power distribution terminals of a distributed feeder network, where the distributed feeder network includes a plurality of power distribution terminals, and the method includes: initializing the serial number and interactive parameters of each power distribution terminal in the distributed feeder network; when a communication interruption point occurs or disappears in the distributed feeder network, the fault power distribution terminal changes self interactive parameters based on self serial numbers; the fault power distribution terminal is a power distribution terminal directly connected with a communication interruption point; each power distribution terminal in the distributed feeder network sends own interaction parameters to the power distribution terminals connected with the power distribution terminal at intervals of a first preset time, each power distribution terminal changes own interaction parameters according to the received interaction parameters after receiving the interaction parameters sent by the power distribution terminals connected with the power distribution terminal, until all the power distribution terminals in the distributed feeder network receive the interaction parameters sent by the power distribution terminals connected with the power distribution terminals within a second preset time, and the protection logic of each power distribution terminal is determined based on the own interaction parameters of the power distribution terminals.
Based on the first aspect, in some embodiments, the interaction parameter includes a lockout state value, a lockout value, and a reset value.
Based on the first aspect, in some embodiments, when a communication interruption point occurs or disappears in the distributed feeder network, the faulty power distribution terminal changes its interaction parameter based on its sequence number, including: when a communication interruption point occurs in the network, setting the blocking state value of the fault power distribution terminal to be 1, and assigning the blocking value of the fault power distribution terminal to be the sum of the serial number value of the fault power distribution terminal and the blocking value before the communication interruption point occurs in the network; when the communication interruption point of the network disappears, the locking state value of the fault power distribution terminal is kept at 1, and the reset value of the fault power distribution terminal is assigned as the sum of the serial number value of the fault power distribution terminal and the reset value before the network communication interruption point disappears.
Based on the first aspect, in some embodiments, after receiving an interaction parameter sent by a power distribution terminal connected to each power distribution terminal, each power distribution terminal changes its interaction parameter according to the received interaction parameter, including: comparing the latching value in the received interactive parameter with the latching value in the interactive parameter, and assigning the latching value in the received interactive parameter to the interactive parameter if the latching value in the received interactive parameter is greater than the latching value in the interactive parameter; and comparing the return value in the received interactive parameter with the return value in the interactive parameter, and assigning the return value in the received interactive parameter to the interactive parameter if the return value in the received interactive parameter is greater than the return value in the interactive parameter.
Based on the first aspect, in some embodiments, the method further includes: when the locking value of the power distribution terminal is not 0, detecting the protection logic of the power distribution terminal, if the protection logic of the power distribution terminal is the preset protection logic, maintaining the preset protection logic, and if the protection logic of the power distribution terminal is the distributed feeder automation protection logic, converting the protection logic of the power distribution terminal from the distributed feeder automation protection logic to the preset protection logic.
Based on the first aspect, in some embodiments, the method further includes: when the power distribution terminal maintains the locking state value to be 1 within a third preset time length and the locking value is consistent with the resetting value, setting the locking value, the resetting value and the locking state value of the power distribution terminal to be 0; when the lockout value, the resetting value and the lockout state value of the power distribution terminal are set to be 0, detecting the protection logic of the power distribution terminal, if the protection logic of the power distribution terminal is the distributed feeder automatic protection logic, maintaining the distributed feeder automatic protection logic, and if the protection logic of the power distribution terminal is the preset protection logic, converting the protection logic of the power distribution terminal from the preset protection logic into the distributed feeder automatic protection logic.
Based on the first aspect, in some embodiments, after the lockout value, the reset value, and the lockout state value of the power distribution terminal are set to 0, the method further includes: and maintaining the locking value, the resetting value and the locking state value of the power distribution terminal to be 0 in a fourth preset time.
In a second aspect, the present invention further provides a distributed feeder network power distribution terminal system, including a plurality of power distribution terminals having a preset network topology, where each power distribution terminal has its own serial number and interaction parameters; in a preset network topology structure, a plurality of power distribution terminals can communicate with the power distribution terminals connected with the power distribution terminals, and self interaction parameters are sent to the power distribution terminals connected with the power distribution terminals every other first preset time; the fault power distribution terminal is a power distribution terminal directly connected with the communication interruption point, and when the communication interruption point occurs or disappears in the distributed feeder network, the fault power distribution terminal can change self interactive parameters based on self serial numbers; after receiving the interaction parameters sent by the power distribution terminals connected with the power distribution terminals, the power distribution terminals can change the interaction parameters of the power distribution terminals according to the received interaction parameters until all the power distribution terminals in the distributed feeder network within a second preset time period receive the interaction parameters sent by the power distribution terminals connected with the power distribution terminals, and the protection logic of each power distribution terminal is determined based on the interaction parameters of the power distribution terminals.
Based on the second aspect, in some embodiments, the interaction parameters include a lockout state value, a lockout value, and a reset value.
Based on the second aspect, in some embodiments, when a communication interruption point occurs or disappears in the distributed feeder network, the faulty power distribution terminal changes its interaction parameter based on its sequence number, including: when a communication interruption point occurs in the network, the fault power distribution terminal can set the blocking state value to 1, and assigns the blocking value of the fault power distribution terminal to be the sum of the serial number value of the fault power distribution terminal and the blocking value before the communication interruption point occurs in the network; when the communication interruption point of the network disappears, the fault power distribution terminal can keep the locking state value at 1, and assigns the reset value of the fault power distribution terminal as the sum of the serial number value of the fault power distribution terminal and the reset value before the network communication interruption point disappears.
In the embodiment of the invention, the logic unification method for determining the protection logic by setting the serial numbers, the interaction parameters and the interaction parameters at a plurality of power distribution terminals of the same distributed feeder network enables the protection logic of all the power distribution terminals to be always consistent no matter the communication interruption point appears or disappears in the same network topology environment.
Drawings
In order to more clearly illustrate the technical solutions in the embodiments of the present invention, the drawings required to be used in the embodiments or the prior art description will be briefly described below, and it is obvious that the drawings in the following description are only some embodiments of the present invention, and for those skilled in the art, other drawings may be obtained according to these drawings without inventive labor.
Fig. 1 is a flowchart of a method for unifying distributed feeder network power distribution terminal logics according to an embodiment of the present invention;
fig. 2 is a schematic diagram of a topology of a distributed feeder network according to an embodiment of the present invention;
fig. 3 is a schematic diagram of a communication break point of a distributed feeder network topology according to an embodiment of the present invention;
fig. 4 is a schematic diagram of a communication interruption point of a distributed feeder network topology according to an embodiment of the present invention.
Detailed Description
The present invention will be more clearly described below with reference to specific examples. The following examples will assist those skilled in the art in further understanding the role of the invention, but are not intended to limit the invention in any way. It should be noted that, for a person skilled in the art, several variations and modifications can be made without departing from the inventive concept, which falls within the scope of the present invention.
To make the objects, technical solutions and advantages of the present application more clear, the following description is made by way of specific embodiments with reference to the accompanying drawings.
In the technical field of distributed feeder network fault protection, the distributed feeder automatic protection logic is a protection logic which does not depend on a master station, realizes quick positioning and removal of faults and recovers power supply in a non-fault area through information interaction between adjacent power distribution terminals, and therefore, the requirement on communication quality between the power distribution terminals is very high.
When the power distribution terminal judges that the communication is interrupted, the distributed feeder automation logic is not applicable any more, and needs to be converted into other protection logic to run. However, in the network topology, only the directly adjacent power distribution terminals have mutual communication, and therefore, other power distribution terminals with communication interruption cannot be judged to still keep the distributed feeder automation logic to continue to operate, so that two protection logics are operated in the same network topology environment, and therefore, the two protection logics bring obstacles to the normal operation of the network and are not beneficial to positioning, analyzing and replaying faults.
Based on the above problem, the present invention provides a method for logically unifying power distribution terminals of a distributed feeder network, as shown in fig. 1, where the method includes steps 101 to 103.
Step 101: and initializing the serial number and the interactive parameters of each power distribution terminal in the distributed feeder network.
In some embodiments, the distributed feeder network includes a plurality of power distribution terminals, and as shown in fig. 2, the power engineer initializes a serial number and interaction parameters of each power distribution terminal in the distributed feeder network by manual setting or automatic setting, and the serial numbers of the plurality of power distribution terminals are set to 01 to 12 in order from left to right in fig. 2. Each initial value in the interaction parameter of each power distribution terminal is 0.
Step 102: when a communication interruption point occurs in the distributed feeder network or disappears, the fault power distribution terminal changes the interaction parameters of the fault power distribution terminal based on the sequence number of the fault power distribution terminal. The fault power distribution terminal is a power distribution terminal directly connected with the communication interruption point.
In some embodiments, the interaction parameter includes a lockout state value, a lockout value, and a reset value, the initial values of the lockout state value, the lockout value, and the reset value being 0. When a communication interruption point occurs in the network, the blocking state value of the fault power distribution terminal is set to be 1, and the blocking value of the fault power distribution terminal is assigned to be the sum of the serial number value of the fault power distribution terminal and the blocking value before the communication interruption point occurs in the network.
When the communication interruption point of the network disappears, the locking state value of the fault power distribution terminal is kept at 1, and the reset value of the fault power distribution terminal is assigned to be the sum of the serial number value of the fault power distribution terminal and the reset value before the network communication interruption point disappears.
Step 103: each power distribution terminal in the distributed feeder network sends own interaction parameters to the power distribution terminals connected with the power distribution terminal at intervals of a first preset time, each power distribution terminal changes own interaction parameters according to the received interaction parameters after receiving the interaction parameters sent by the power distribution terminals connected with the power distribution terminal, until all the power distribution terminals in the distributed feeder network receive the interaction parameters sent by the power distribution terminals connected with the power distribution terminals within a second preset time, and the protection logic of each power distribution terminal is determined based on the own interaction parameters of the power distribution terminals.
In some embodiments, the magnitude of the latching value in the received interactive parameter is compared with the magnitude of the latching value in the own interactive parameter, and if the latching value in the received interactive parameter is greater than the latching value in the own interactive parameter, the latching value in the received interactive parameter is assigned to the own interactive parameter.
And comparing the return value in the received interactive parameter with the return value in the interactive parameter, and assigning the return value in the received interactive parameter to the interactive parameter if the return value in the received interactive parameter is greater than the return value in the interactive parameter.
The second preset time length is determined by the number of the power distribution terminals in the distributed feeder network and the first preset time length, and after the second preset time length, any power distribution terminal in the distributed feeder network should receive the interactive parameter information transmitted by the fault power distribution terminal at any position in the distributed feeder network.
In some embodiments, the protection logic of each distribution terminal is determined based on an interaction parameter of the distribution terminal itself, when a blocking value of the distribution terminal is not 0, the protection logic of the distribution terminal is detected, if the protection logic of the distribution terminal is a preset protection logic, the preset protection logic is maintained, and if the protection logic of the distribution terminal is a distributed feeder automation protection logic, the protection logic of the distribution terminal is converted from the distributed feeder automation protection logic to the preset protection logic.
And when the power distribution terminal maintains the locking state value to be 1 in the third preset time period and the locking value is consistent with the resetting value, setting the locking value, the resetting value and the locking state value of the power distribution terminal to be 0, and maintaining the locking value, the resetting value and the locking state value of the power distribution terminal to be 0 in the fourth preset time period.
When the lockout value, the resetting value and the lockout state value of the power distribution terminal are set to be 0, detecting the protection logic of the power distribution terminal, if the protection logic of the power distribution terminal is the distributed feeder automatic protection logic, maintaining the distributed feeder automatic protection logic, and if the protection logic of the power distribution terminal is the preset protection logic, converting the protection logic of the power distribution terminal from the preset protection logic into the distributed feeder automatic protection logic.
The invention also provides a distributed feeder network power distribution terminal system which is suitable for the distributed feeder network power distribution terminal logic unification method.
In the preset network topology structure, a plurality of power distribution terminals can communicate with the power distribution terminals connected with the power distribution terminals, and the self interaction parameters are sent to the power distribution terminals connected with the power distribution terminals every other first preset time.
The fault power distribution terminal is a power distribution terminal directly connected with the communication interruption point, and when the communication interruption point occurs or disappears in the distributed feeder network, the fault power distribution terminal can change self interaction parameters based on self sequence numbers.
After receiving the interaction parameters sent by the power distribution terminals connected with the power distribution terminals, the plurality of power distribution terminals can change the interaction parameters of the power distribution terminals according to the received interaction parameters until all the power distribution terminals in the distributed feeder network within a second preset time period receive the interaction parameters sent by the power distribution terminals connected with the power distribution terminals, and the protection logic of each power distribution terminal is determined based on the interaction parameters of the power distribution terminals.
The interaction parameters include a lockout state value, a lockout value, and a reset value. When a communication interruption point occurs in the network, the fault power distribution terminal can set the blocking state value to 1, and the blocking value of the fault power distribution terminal is assigned to be the sum of the serial number value of the fault power distribution terminal and the blocking value before the communication interruption point occurs in the network.
When the communication interruption point of the network disappears, the fault power distribution terminal can keep the locking state value at 1, and assigns the reset value of the fault power distribution terminal as the sum of the serial number value of the fault power distribution terminal and the reset value before the network communication interruption point disappears.
When the locking value of the power distribution terminal is not 0, the protection logic of the power distribution terminal is detected, if the protection logic of the power distribution terminal is the preset protection logic, the power distribution terminal can maintain the preset protection logic, and if the protection logic of the power distribution terminal is the distributed feeder line automatic protection logic, the power distribution terminal can convert the protection logic into the preset protection logic from the distributed feeder line automatic protection logic.
When the power distribution terminal maintains that the locking state value is 1 and the locking value is consistent with the resetting value in the third preset time length, the power distribution terminal can set the locking value, the resetting value and the locking state value to 0.
When the lockout value, the resetting value and the lockout state value of the power distribution terminal are set to be 0, the protection logic of the power distribution terminal is detected, if the protection logic of the power distribution terminal is the distributed feeder automatic protection logic, the power distribution terminal can maintain the distributed feeder automatic protection logic, and if the protection logic of the power distribution terminal is the preset protection logic, the power distribution terminal can convert the protection logic from the preset protection logic into the distributed feeder automatic protection logic.
After the lockout value, the reset value and the lockout state value of the power distribution terminal are set to be 0, the power distribution terminal can maintain the lockout value, the reset value and the lockout state value of the power distribution terminal to be 0 within a fourth preset time.
Example 1
As shown in fig. 3, the serial number and the interactive parameter of each power distribution terminal in the distributed feeder network are initialized, the serial numbers 1 to 12 of the power distribution terminals are respectively assigned from left to right in the figure, and the lockout state value, the lockout value, and the reset value in the interactive parameters of all the power distribution terminals are all assigned to 0.
When a communication interruption point occurs in the network, such as between the power distribution terminal 06 and the power distribution terminal 07 in fig. 3, the communication is interrupted.
First, the left side of the communication interruption point is analyzed, and the power distribution terminal 06 is a fault power distribution terminal directly connected to the communication interruption point. The locking state value of the power distribution terminal 06 is set to 1, and meanwhile, the locking value of the power distribution terminal 06 is assigned to be the sum of the serial number value 6 of the power distribution terminal 06 and the locking value 0 before the communication interruption point occurs in the network, namely, the locking value is assigned to be 6. The interaction parameters sent by the power distribution terminal 06 are a lockout state value 1, a lockout value 6 and a reset value 0. And detecting the protection logic of the power distribution terminal 06, and converting the protection logic of the power distribution terminal 06 from the distributed feeder automation protection logic into preset protection logic for operation.
After the power distribution terminal 04 and the power distribution terminal 05 receive the interactive parameters of the power distribution terminal 06, the magnitude of the latching value 6 in the interactive parameters received by the power distribution terminal 06 and the magnitude of the latching value 0 in the interactive parameters of the power distribution terminal 06 are compared, and as the latching value 6 in the received interactive parameters is greater than the latching value 0 in the interactive parameters of the power distribution terminal 04 and the power distribution terminal 05, the latching value 6 in the received interactive parameters is assigned to the interactive parameters of the power distribution terminal 04 and the power distribution terminal 05. And the interaction parameters of the power distribution terminal 04 and the power distribution terminal 05 are changed into a locking state value 0, a locking value 6 and a resetting value 0, and the power distribution terminal 04 and the power distribution terminal 05 are converted from the distributed feeder automatic protection logic into the preset protection logic to operate.
The method comprises the steps that a power distribution terminal 04 and a power distribution terminal 05 send interaction parameters to a connected power distribution terminal every a first time period, the power distribution terminal 03 can receive the interaction parameters of the power distribution terminal 04, the power distribution terminal 01 and the power distribution terminal 02 receive the interaction parameters of the power distribution terminal 03, the interaction parameters of all power distribution terminals on the left side of a communication interruption point are changed into a lockout state value 0, a lockout value 6 and a reset value 0 after the power distribution terminal 03, the power distribution terminal 02 and the power distribution terminal 01 all receive the interaction parameters sent by the connected power distribution terminal within a second preset time period, and all the power distribution terminals on the left side of the communication interruption point are converted into preset protection logic operation from distributed feeder automation protection logic.
And analyzing the right side of the communication interruption point, sending an interactive parameter locking state value 1, a locking value 7 and a resetting value 0 to the outside by the power distribution terminal 07, and converting the distributed feeder automation protection logic of the power distribution terminal 07 into preset protection logic for operation.
After receiving the interaction parameters of the power distribution terminal 07, the power distribution terminal 09 and the power distribution terminal 08 both send a locking state value 0, a locking value 7 and a resetting value 0 to the outside, and the power distribution terminal 09 and the power distribution terminal 08 are converted from the distributed feeder automatic protection logic to the preset protection logic for operation.
The power distribution terminal 10 receives the interaction parameters of the power distribution terminal 09, the power distribution terminal 11 and the power distribution terminal 12 receive the interaction parameters of the power distribution terminal 10, then the power distribution terminal 10, the power distribution terminal 11 and the power distribution terminal 12 all send a locking state value 0, a locking value 7 and a resetting value 0 outwards, and all power distribution terminals on the right side of the communication interruption point are converted into preset protection logic operation from distributed feeder automatic protection logic in the second preset time period.
When the communication interruption point disappears, the communication between the power distribution terminal 06 and the power distribution terminal 07 is restored to normal.
And analyzing the left side of the disappearance of the communication interruption point, keeping the locking state value of the fault power distribution terminal 06 to be 1 when the communication interruption point of the network disappears, and assigning the reset value of the fault power distribution terminal 06 to be the sum of the serial number value 6 of the fault power distribution terminal 06 and the reset value 0 before the disappearance of the network communication interruption point. At the moment, the interactive parameters of the power distribution terminal 06 are a locked state value 1, a locked value 6 and a reset value 6, after the power distribution terminal 06 maintains the interactive parameters for the third preset time period, the interactive parameters are changed into a locked state value 0 and a locked value 0, the reset value 0 is changed from the preset protection logic to the distributed feeder automation protection logic operation, the interactive parameters of the power distribution terminal 06 are not newly assigned within the fourth preset time period, the locked state value 0 and the locked value 0 are maintained, and the reset value 0 is not changed.
After receiving the interaction parameters of the power distribution terminal 06, the power distribution terminal 04 and the power distribution terminal 05 send a lockout state value 0, a lockout value 6, and a reset value 6, after a third preset time, the preset protection logic is switched to the distributed feeder automatic protection logic operation, and the lockout state value 0, the lockout value 0, the reset value 0, and no new assignment is performed within a fourth preset time.
The power distribution terminal 03 receives the interaction parameters of the power distribution terminal 04, the power distribution terminal 01 and the power distribution terminal 02 receive the interaction parameters of the power distribution terminal 03, a locking state value 0, a locking value 6 and a resetting value 6 are sent, after the third preset time period, the third preset time period is converted into distributed feeder automatic protection logic operation from preset protection logic, the locking state value 0, the locking value 0 and the resetting value 0 are sent, and new assignment is not carried out within the fourth preset time period.
And analyzing the right side of the disappearance of the communication break point, the power distribution terminal 07 sends a locking state value 1, a locking value 7 and a resetting value 7, the preset protection logic is switched to the distributed feeder automation protection logic operation after the third preset time, the locking state value 0, the locking value 0 and the resetting value 0 are sent, and new assignment is not carried out within the fourth preset time.
After receiving the interaction parameters of the power distribution terminal 07, the power distribution terminal 09 and the power distribution terminal 08 both send a lockout state value 0, a lockout value 7 and a reset value 7, the third preset time period is converted from the preset protection logic to the distributed feeder automatic protection logic operation, the lockout state value 0, the lockout value 0 and the reset value 0 are sent, and new assignment is not carried out within the fourth preset time period.
The power distribution terminal 10 receives the interactive parameters of the power distribution terminal 09, the power distribution terminal 11 and the power distribution terminal 12 receive the interactive parameters of the power distribution terminal 10, and send a lockout state value 0, a lockout value 7 and a reset value 7, after a third preset time, the third preset time is converted from preset protection logic into distributed feeder automatic protection logic operation, and the third preset time is sent to send a lockout state value 0, a lockout value 0, a reset value 0, and no new assignment is performed within a fourth preset time.
Example 2
The serial number and the interactive parameter of each power distribution terminal in the distributed feeder network are initialized, the serial numbers 1 to 12 of the power distribution terminals are respectively assigned from left to right in the figure, and the latching state value, the latching value and the resetting value in the interactive parameters of all the power distribution terminals are all assigned to be 0.
When a communication interruption point occurs in the network, as shown in fig. 4, communication at the communication interruption point occurs among the power distribution terminal 04, the power distribution terminal 05, and the power distribution terminal 06.
Analysis to the left of the communication break:
the power distribution terminal 05 sends a locking state value 1, a locking value 5 and a resetting value 0, and the power distribution terminal 05 is converted from the distributed feeder automatic protection logic into other protection logics to operate.
The power distribution terminal 04 sends a locking state value 1, a locking value 4 and a resetting value 0, and the power distribution terminal 04 is converted from the distributed feeder automatic protection logic into other protection logics to operate.
After receiving the interaction parameters of the power distribution terminal 04, the power distribution terminal 05 sends a lockout state value 1, a lockout value 9 and a reset value 0.
After receiving the interaction parameters of the power distribution terminal 05, the power distribution terminal 04 sends a lockout state value 1, a lockout value 9 and a reset value 0.
After receiving the interaction parameters of the power distribution terminal 04, the power distribution terminal 03 sends a locking state value 0, a locking value 9 and a resetting value 0, and the power distribution terminal 03 is converted from the distributed feeder automatic protection logic to other protection logics for operation.
The power distribution terminal 01 and the power distribution terminal 02 receive the interactive parameters of the power distribution terminal 03, send a locking state value 0, a locking value 9 and a resetting value 0, and convert the distributed feeder automatic protection logic of all the power distribution terminals into other protection logic to operate.
Analysis to the right of the communication break:
the power distribution terminal 06 sends a lockout state value 1, a lockout value 6 and a reset value 0, and the power distribution terminal 06 is converted from the distributed feeder automatic protection logic to other protection logic to operate.
After receiving the interaction parameters of the power distribution terminal 06, the power distribution terminal 07 sends a lockout state value 0, a lockout value 6, and a reset value 0, and the power distribution terminal 07 is converted from the distributed feeder automation protection logic to other protection logic for operation.
The power distribution terminal 08 and the power distribution terminal 09 receive the interaction parameters of the power distribution terminal 07, the power distribution terminal 10 receives the interaction parameters of the power distribution terminal 09, the power distribution terminal 11 and the power distribution terminal 12 receive the interaction parameters of the power distribution terminal 10, the power distribution terminal and the power distribution terminal all send a locking state value 0, a locking value 6 and a resetting value 0, and all the power distribution terminals are converted from distributed feeder automatic protection logic to other protection logic to operate.
When the communication interruption point disappears, the communication among the power distribution terminal 04, the power distribution terminal 05 and the power distribution terminal 06 is normal.
Analysis to the left:
the distribution terminal 05 transmits the lockout state value 1, the lockout value 9, and the reset value 5.
The distribution terminal 04 transmits the lockout state value 1, the lockout value 9, and the reset value 4.
After receiving the interaction parameters of the power distribution terminal 04, the power distribution terminal 05 sends a lockout state value 1, a lockout value 9, and a reset value 9.
After receiving the interaction parameters of the power distribution terminal 05, the power distribution terminal 04 sends a lockout state value 1, a lockout value 9 and a reset value 9.
After the third preset time, the distribution terminal 04 and the distribution terminal 05 are converted from other protection logics into distributed feeder automatic protection logics to operate, a locking state value 0, a locking value 0 and a resetting value 0 are sent, and new assignment is not performed within the fourth preset time.
After receiving the interaction parameters of the power distribution terminal 04, the power distribution terminal 03 sends a locking state value 0, a locking value 9 and a reset value 9, the power distribution terminal is switched from other protection logics to distributed feeder automation protection logic operation according to the third preset time length, the locking state value 0, the locking value 0 and the reset value 0 are sent, and new assignment is not carried out within the fourth preset time length.
After receiving the interaction parameters of the power distribution terminal 03, the power distribution terminal 01 and the power distribution terminal 02 send a locking state value 0, a locking value 9 and a resetting value 9, the power distribution terminal is switched from other protection logics to distributed feeder automatic protection logic operation according to a third preset time length, the locking state value 0, the locking value 0 and the resetting value 0 are sent, and new assignment is not carried out within a fourth preset time length.
Analysis to the right:
the power distribution terminal 06 sends a lockout state value 1, a lockout value 6 and a reset value 6, after a third preset time, the power distribution terminal 06 is converted from other protection logics into distributed feeder automation protection logic operation, and sends a lockout state value 0, a lockout value 0 and a reset value 0, and new assignment is not performed within a fourth preset time.
After receiving the interaction parameters of the power distribution terminal 06, the power distribution terminal 07 sends a lockout state value 0, a lockout value 6, and a reset value 6, after a third preset time, the power distribution terminal 07 is switched from other protection logics to distributed feeder automation protection logic operation, sends a lockout state value 0, a lockout value 0, and a reset value 0, and no new assignment is performed within a fourth preset time.
The power distribution terminal 08 and the power distribution terminal 09 receive the interaction parameters of the power distribution terminal 07, the power distribution terminal 10 receives the interaction parameters of the power distribution terminal 09, the power distribution terminal 11 and the power distribution terminal 12 receive the interaction parameters of the power distribution terminal 10, and both send a locking state 0, a locking value 6 and a resetting value 6, after a third preset time, all the power distribution terminals are converted from other protection logics into distributed feeder automatic protection logic operation, and the locking state value 0, the locking value 0, the resetting value 0 and new assignment within a fourth preset time are sent.
In the above embodiments, the description of each embodiment has its own emphasis, and reference may be made to the related description of other embodiments for parts that are not described or recited in any embodiment.
Those of ordinary skill in the art will appreciate that the various illustrative elements and algorithm steps described in connection with the embodiments disclosed herein may be implemented as electronic hardware, or combinations of computer software and electronic hardware. Whether such functionality is implemented as hardware or software depends upon the particular application and design constraints imposed on the implementation. Skilled artisans may implement the described functionality in varying ways for each particular application, but such implementation decisions should not be interpreted as causing a departure from the scope of the present invention.
In the embodiments provided in the present invention, it should be understood that the disclosed apparatus/terminal device and method may be implemented in other ways. For example, the above-described embodiments of the apparatus/terminal device are merely illustrative, and for example, the division of the modules or units is only one type of logical function division, and other division manners may be available in actual implementation, for example, multiple units or components may be combined or integrated into another system, or some features may be omitted, or not executed. In addition, the shown or discussed mutual coupling or direct coupling or communication connection may be an indirect coupling or communication connection through some interfaces, devices or units, and may be in an electrical, mechanical or other form.
The units described as separate parts may or may not be physically separate, and parts displayed as units may or may not be physical units, may be located in one position, or may be distributed on multiple network units. Some or all of the units can be selected according to actual needs to achieve the purpose of the solution of the embodiment.
In addition, functional units in the embodiments of the present invention may be integrated into one processing unit, or each unit may exist alone physically, or two or more units are integrated into one unit. The integrated unit can be realized in a form of hardware, and can also be realized in a form of a software functional unit.
The integrated module/unit, if implemented in the form of a software functional unit and sold or used as a stand-alone product, may be stored in a computer readable storage medium. Based on such understanding, all or part of the flow of the method according to the embodiments of the present invention may also be implemented by a computer program, which may be stored in a computer-readable storage medium, and when the computer program is executed by a processor, the steps of the method embodiments may be implemented. Wherein the computer program comprises computer program code, which may be in the form of source code, object code, an executable file or some intermediate form, etc. The computer-readable medium may include: any entity or device capable of carrying the computer program code, recording medium, usb disk, removable hard disk, magnetic disk, optical disk, computer memory, read-only memory (ROM), random Access Memory (RAM), electrical carrier wave signals, telecommunications signals, software distribution medium, etc.
The above-mentioned embodiments are only used for illustrating the technical solutions of the present invention, and not for limiting the same; although the present invention has been described in detail with reference to the foregoing embodiments, it will be understood by those of ordinary skill in the art that: the technical solutions described in the foregoing embodiments may still be modified, or some technical features may be equivalently replaced; such modifications and substitutions do not substantially depart from the spirit and scope of the embodiments of the present invention, and are intended to be included within the scope of the present invention.
Claims (8)
1. A method of logically unifying distributed feeder network power distribution terminals, the distributed feeder network comprising a plurality of power distribution terminals, the method comprising:
initializing the serial number and interaction parameters of each power distribution terminal in the distributed feeder network;
when a communication interruption point occurs in the distributed feeder network or disappears, the fault power distribution terminal changes the interaction parameters of the fault power distribution terminal based on the sequence number of the fault power distribution terminal; the fault power distribution terminal is a power distribution terminal directly connected with a communication interruption point;
each power distribution terminal in the distributed feeder network sends self interaction parameters to the power distribution terminals connected with the power distribution terminal at intervals of a first preset time length, and each power distribution terminal changes the self interaction parameters according to the received interaction parameters after receiving the interaction parameters sent by the power distribution terminal connected with the power distribution terminal, until all the power distribution terminals in the distributed feeder network receive the interaction parameters sent by the power distribution terminals connected with the power distribution terminals within a second preset time length, and the protection logic of each power distribution terminal is determined based on the self interaction parameters of the power distribution terminals;
wherein the interaction parameters comprise a lockout state value, a lockout value and a reset value;
after each power distribution terminal receives the interaction parameters sent by the power distribution terminals connected with the power distribution terminal, the interaction parameters of the power distribution terminals are changed according to the received interaction parameters, and the method comprises the following steps:
comparing the magnitude of the locking value in the received interactive parameter with the magnitude of the locking value in the interactive parameter per se, and assigning the locking value in the received interactive parameter to the interactive parameter per se if the locking value in the received interactive parameter is greater than the locking value in the interactive parameter per se;
and comparing the magnitude of the return value in the received interactive parameter with the magnitude of the return value in the interactive parameter per se, and assigning the return value in the received interactive parameter to the interactive parameter per se if the return value in the received interactive parameter is greater than the return value in the interactive parameter per se.
2. The method of claim 1, wherein the changing, by the failed distribution terminal, its interaction parameters based on its sequence number when the communication interruption point occurs or disappears in the distributed feeder network comprises:
when a communication interruption point occurs in the network, setting the blocking state value of the fault power distribution terminal to be 1, and assigning the blocking value of the fault power distribution terminal to be the sum of the sequence number value of the fault power distribution terminal and the blocking value of the network before the communication interruption point occurs;
when the communication interruption point of the network disappears, the locking state value of the fault power distribution terminal is kept at 1, and the reset value of the fault power distribution terminal is assigned as the sum of the serial number value of the fault power distribution terminal and the reset value before the network communication interruption point disappears.
3. The distributed feeder network power distribution terminal logic unification method of claim 1, further comprising:
when the lockout value of the power distribution terminal is not 0, the protection logic of the power distribution terminal is detected, if the protection logic of the power distribution terminal is in the preset protection logic state, the preset protection logic state is maintained, and if the protection logic of the power distribution terminal is in the distributed feeder automation protection logic state, the protection logic of the power distribution terminal is changed from the distributed feeder automation protection logic state to the preset protection logic state.
4. The distributed feeder network power distribution terminal logic unification method of claim 3, further comprising:
when the power distribution terminal maintains that the locking state value is 1 and the locking value is consistent with the resetting value within a third preset time length, setting the locking value, the resetting value and the locking state value of the power distribution terminal to be 0;
when the lockout value, the resetting value and the lockout state value of the power distribution terminal are set to be 0, the protection logic of the power distribution terminal is detected, if the protection logic of the power distribution terminal is distributed feeder automatic protection logic, the distributed feeder automatic protection logic is maintained, and if the protection logic of the power distribution terminal is preset protection logic, the protection logic of the power distribution terminal is changed from the preset protection logic to the distributed feeder automatic protection logic.
5. The distributed feeder network power distribution terminal logical unification method of claim 4, wherein when said power distribution terminal lockout, reset, and lockout status values are set to 0, said method further comprises:
and maintaining the locking value, the resetting value and the locking state value of the power distribution terminal to be 0 in a fourth preset time.
6. A distributed feeder network power distribution terminal system, characterized in that the distributed feeder network power distribution terminal logic unification method according to any one of claims 1-5 is applied, the distributed feeder network power distribution terminal system comprises a plurality of power distribution terminals with a preset network topology structure, wherein each power distribution terminal has its own serial number and interaction parameters;
in the preset network topology structure, the plurality of power distribution terminals can communicate with the power distribution terminals connected with the power distribution terminals, and self interaction parameters are sent to the power distribution terminals connected with the power distribution terminals every other first preset time;
the fault power distribution terminal is a power distribution terminal directly connected with the communication interruption point, and when the communication interruption point occurs or disappears in the distributed feeder network, the fault power distribution terminal can change self interactive parameters based on self serial numbers;
after receiving the interaction parameters sent by the power distribution terminals connected with the power distribution terminals, the power distribution terminals can change the interaction parameters of the power distribution terminals according to the received interaction parameters until all the power distribution terminals in the distributed feeder network receive the interaction parameters sent by the power distribution terminals connected with the power distribution terminals within a second preset time period, and the protection logic of each power distribution terminal is determined based on the interaction parameters of the power distribution terminals.
7. The distributed feeder network power distribution terminal system of claim 6, wherein the interaction parameters include a lockout state value, a lockout value, and a reset value.
8. The distributed feeder network power distribution terminal system of claim 7, wherein said failed power distribution terminal changing its interaction parameters based on its sequence number when a communication interruption point occurs or disappears in the distributed feeder network comprises:
when a communication interruption point occurs in the network, the fault power distribution terminal can set the blocking state value to 1, and assigns the blocking value of the fault power distribution terminal to be the sum of the serial number value of the fault power distribution terminal and the blocking value before the communication interruption point occurs in the network;
when the communication interruption point of the network disappears, the fault power distribution terminal can keep the locking state value at 1, and assigns the reset value of the fault power distribution terminal as the sum of the serial number value of the fault power distribution terminal and the reset value before the network communication interruption point disappears.
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