Feeder automation processing method and system for mutual conversion between centralized type and in-situ type

Abstract

The present invention provides a feeder automation processing method and system capable of mutual conversion between centralized type and in-situ type, which relates to the technical field of feeder automation. The method includes dividing the switch types in the distribution line; configuring all the points required for the two feeder automation operation modes of centralized FA and in-situ FA for all switches except the outlet circuit breaker on the distribution line, and configuring two reclosing operations for the outlet circuit breaker; configuring two operation parameters of centralized FA and in-situ FA for the distribution automation master station, and setting that the three points of residual voltage locking, loss-of-voltage tripping, and delayed closing upon power restoration of the first sectionalizing switch are effective in both the centralized FA and in-situ FA modes; adding an item of residual voltage locking of the first sectionalizing switch to the start-up condition of the centralized FA mode, and taking the presence of terminal disconnection as the switching condition of the in-situ FA mode, so that the distribution line has the ability to mutually convert between centralized FA and in-situ FA. The present invention improves the operation reliability of the distribution line and reduces the line outage time.

Description

Technical Field

[0001] The present invention relates to the technical field of feeder automation, and in particular to a feeder automation processing method and system for mutual conversion between centralized type and local type. Background Art

[0002] At present, as a core technology of distribution automation, feeder automation plays a huge role in monitoring the operating conditions of distribution lines, locating and isolating fault sections, and restoring power supply to non-fault sections. And centralized feeder automation (FA) is the most common mode of feeder automation, which has high reliability and low misoperation rate, can reduce the fault isolation time and shorten the number of full-line outages of distribution lines. However, centralized FA has the following limitations:

[0003] 1) It has a strong dependence on communication signals. In the case of all or individual terminals dropping offline on the line, the fault isolation range will be expanded.

[0004] 2) In some areas of Shanxi, the acquisition of telemetry and telecommunication information of the outlet circuit breaker and the issuance of remote control commands can only be carried out in the dispatching system of the main grid. If a fault occurs between the outlet circuit breaker and the first sectional switch on the line, resulting in the outlet circuit breaker tripping, the distribution automation master station system cannot collect the line tripping information in time, and FA does not start, resulting in full-line outages from time to time. Summary of the Invention

[0005] Therefore, the embodiments of the present invention provide a feeder automation processing method and system for mutual conversion between centralized type and local type, which are used to solve the problems in the prior art that centralized FA has a strong dependence on communication signals, and in the case of all or individual terminals dropping offline on the line, the fault isolation range will be expanded, and the acquisition of telemetry and telecommunication information of the outlet circuit breaker and the issuance of remote control commands can only be carried out in the dispatching system of the main grid. When FA does not start, it will lead to full-line outages and other problems.

[0006] To solve the above problems, the embodiments of the present invention provide a feeder automation processing method for mutual conversion between centralized type and local type, and the method includes:

[0007] Classify the switch types in the distribution line, and the switch types include line outlet circuit breaker, first sectional switch, ordinary sectional switch, and tie switch;

[0008] Configure all the points required for two feeder automation operation modes of centralized feeder automation and local feeder automation for all switches except the outlet circuit breaker on the distribution line, and configure two reclosing operations for the outlet circuit breaker;

[0009] Configure two sets of operating parameters for centralized feeder automation and local feeder automation in the distribution automation master station, and set the three points of residual voltage locking, loss-of-voltage tripping, and delayed closing upon power restoration of the first sectional switch to be effective in both the centralized feeder automation and local feeder automation modes;

[0010] In the distribution automation master station system, add the item of residual voltage locking of the first sectional switch to the start-up conditions of the centralized feeder automation mode, and use the presence of terminal disconnection as the switching condition for the local feeder automation mode, so that the distribution line has the ability to convert between centralized feeder automation and local feeder automation.

[0011] Preferably, the outlet circuit breaker is a circuit breaker within the substation; the first sectional switch is the first circuit breaker downstream of the outlet circuit breaker. When there are multiple branches downstream, there are multiple first sectional switches; the ordinary sectional switches are all sectional switches except the first sectional switch; the tie switch is a switch connecting two distribution lines, and its normal state is open.

[0012] Preferably, the conversion process between centralized feeder automation and local feeder automation specifically includes:

[0013] Under normal circumstances, set the distribution line to operate in the centralized feeder automation mode;

[0014] When a permanent fault occurs between the outlet circuit breaker and the first sectional switch, the outlet circuit breaker trips due to overcurrent, the first section loses voltage and trips, then the outlet circuit breaker fails to reclose and locks, and the first sectional switch locks due to detecting instantaneous power restoration;

[0015] When the distribution automation master station system receives the residual voltage locking tele-signal sent by the first sectional switch, immediately start the centralized feeder automation processing flow. After confirming that the outlet circuit breaker and the first sectional switch are in the tripped state, the distribution automation master station issues a closing command to the tie switch to complete the location isolation of the fault area and the restoration of power supply to the non-fault area;

[0016] When an instantaneous fault occurs between the outlet circuit breaker and the first sectional switch, the outlet circuit breaker trips due to overcurrent, the first section loses voltage and trips, then the outlet circuit breaker recloses successfully, and the first sectional switch closes successfully after a delay;

[0017] When the distribution automation master station system receives permanent fault information at any location, except for the fault information between the outlet circuit breaker and the first sectional switch of the line, send a general call command to all terminals on the distribution line. If there is a terminal disconnection, a tele-signal indicating the presence of terminal disconnection is sent;

[0018] If the distribution automation master station receives the tele-signal indicating the presence of terminal disconnection, the distribution line automatically switches to the local feeder automation operation mode.

[0019] Preferably, when a permanent fault occurs between the outlet circuit breaker and the first sectionalizing switch, the power distribution line processing procedure specifically includes:

[0020] When a permanent fault occurs at point F1 between the outlet circuit breaker CB1 and the first sectionalizing switch FS11, the power distribution automation master station receives the fault tele-signaling information, the protection of the outlet circuit breaker CB1 operates to trip, and the first sectionalizing switch FS11 opens due to loss of voltage;

[0021] The substation outlet circuit breaker CB1 performs a single reclosing operation;

[0022] Due to closing on the fault point, the outlet circuit breaker CB1 protects and operates to trip again. Since the closing time is less than Y time, the outlet circuit breaker CB1 is blocked and no second reclosing operation is performed; meanwhile, the first sectionalizing switch FS11 is blocked because the instantaneous residual voltage is detected, and the fault point is located and isolated;

[0023] The blocked tele-signaling of the first sectionalizing switch FS11 is sent to the power distribution automation master station. The power distribution automation master station determines that the fault occurs between the outlet circuit breaker CB1 and the first sectionalizing switch FS11, and starts the feeder automation processing program to close the tie switch LS to complete the power supply to the non-fault area.

[0024] Preferably, when an instantaneous fault occurs between the outlet circuit breaker and the first sectionalizing switch, the power distribution line processing procedure specifically includes:

[0025] When an instantaneous fault occurs at point F1 between the outlet circuit breaker CB1 and the first sectionalizing switch FS11, the power distribution automation master station receives the fault tele-signaling information, the protection of the outlet circuit breaker CB1 operates to trip, and the first sectionalizing switch FS11 opens due to loss of voltage;

[0026] The substation outlet circuit breaker CB1 performs a single reclosing operation. Since the fault between the outlet circuit breaker CB1 and the first sectionalizing switch FS11 has disappeared, the outlet circuit breaker CB1 recloses successfully;

[0027] The first sectionalizing switch FS11 closes successfully after a 7s delay.

[0028] Preferably, when there is a terminal disconnection in the power distribution line and a permanent fault occurs between two ordinary sectionalizing switches, the power distribution line processing procedure specifically includes:

[0029] When a permanent fault occurs at point F2 between the ordinary sectionalizing switch FS12 and the ordinary sectionalizing switch FS13, the power distribution automation master station receives the fault tele-signaling information, the power distribution automation master station starts the general call program, discovers that the ordinary sectionalizing switch FS12 is disconnected, and randomly switches to the local type feeder automation operation mode;

[0030] The circuit breaker CB1 at the substation outlet detects a line fault, the protection operates and trips, all voltage-type switches on the distribution line on the CB1 side of the outlet circuit breaker open due to loss of voltage, and at the same time, the tie switch LS starts a countdown of X time due to unilateral loss of voltage;

[0031] The outlet circuit breaker CB1 makes the first reclosing. After 7 s, the first sectionalizing switch FS11 is energized and closes. After another 7 s, the ordinary sectionalizing switch FS12 is energized and closes onto the fault point;

[0032] The outlet circuit breaker CB1 is protected and trips again. The first sectionalizing switch FS11, the ordinary sectionalizing switches FS12 and FS13 lose voltage and open, and the ordinary sectionalizing switches FS12 and FS13 are locked;

[0033] The substation outlet circuit breaker CB1 makes the second reclosing. After 7 s, the first sectionalizing switch FS11 on the distribution line on the CB1 side of the outlet circuit breaker closes;

[0034] The countdown of X time of the tie switch LS ends, and it automatically closes to restore power supply to the non-fault section.

[0035] Preferably, when there is a situation of terminal disconnection in the distribution line and an instantaneous fault occurs between ordinary sectionalizing switches, the specific process of processing the distribution line includes:

[0036] When an instantaneous fault occurs at point F2 between the ordinary sectionalizing switch FS12 and the ordinary sectionalizing switch FS13, the distribution automation master station receives the fault telemetry signal, starts the general call program, discovers that the ordinary sectionalizing switch FS12 is disconnected, and randomly switches to the local type of feeder automation operation mode;

[0037] The circuit breaker CB1 at the substation outlet detects a line fault, the protection operates and trips, all voltage-type switches on the distribution line on the CB1 side of the outlet circuit breaker open due to loss of voltage, and at the same time, the tie switch LS starts a countdown of X time due to unilateral loss of voltage;

[0038] The outlet circuit breaker CB1 makes the first reclosing. After 7 s, the first sectionalizing switch FS11 is energized and closes. After another 7 s, the ordinary sectionalizing switch FS12 is energized and closes. Since the fault at point F2 has disappeared, after another 7 s, the ordinary sectionalizing switch FS13 is energized and closes, and the line resumes normal power supply.

[0039] The embodiment of the present invention also provides a feeder automation processing system that can be mutually converted between a centralized type and a local type, and the system includes:

[0040] A switch type classification module, which is used to classify the switch types in the distribution line, and the switch types include a line outlet circuit breaker, a first sectionalizing switch, an ordinary sectionalizing switch, and a tie switch;

[0041] A switch configuration module, which is used to configure all points required for two feeder automation operation modes, namely centralized feeder automation and local feeder automation, for all switches on the distribution line except the outlet circuit breaker, and configure two reclosing operations for the outlet circuit breaker;

[0042] A master station configuration module, which is used to configure two operation parameters, namely centralized feeder automation and local feeder automation, for the distribution automation master station, and set that the three points of residual voltage locking, loss-of-voltage tripping, and delayed closing when power is restored of the first sectionalizing switch are valid in both the centralized feeder automation mode and the local feeder automation mode;

[0043] A condition setting module, which is used to add the item of residual voltage locking of the first sectionalizing switch to the start condition of the centralized feeder automation mode in the distribution automation master station system, and use the presence of terminal disconnection as the switching condition of the local feeder automation mode, so that the distribution line has the ability to mutually convert between centralized feeder automation and local feeder automation.

[0044] An embodiment of the present invention also provides an electronic device, which includes a processor, a memory, and a bus system. The processor and the memory are connected through the bus system. The memory is used to store instructions, and the processor is used to execute the instructions stored in the memory to implement the above-mentioned feeder automation processing method for mutual conversion between centralized type and local type.

[0045] An embodiment of the present invention also provides a computer storage medium, which stores a computer software product. The computer software product includes several instructions for causing a computer device to execute the above-mentioned feeder automation processing method for mutual conversion between centralized type and local type.

[0046] It can be seen from the above technical solutions that the present invention application has the following advantages:

[0047] (1) The present invention configures the functions of "residual voltage locking", "loss-of-voltage tripping", and "delayed closing when power is restored" for the first sectionalizing switch of the distribution line, and adds the occurrence of "residual voltage locking" of the first sectionalizing switch of the distribution line to the start condition of the centralized FA. Therefore, when a fault occurs between the outlet circuit breaker and the first sectionalizing switch of the line without the main and distribution network information systems being connected, the distribution automation master station system can still obtain the fault information in time, isolate the fault section, and restore power supply to the non-fault section; and because the first sectionalizing switch is simultaneously configured with the functions of "loss-of-voltage tripping" and "delayed closing when power is restored", the distribution line still has the ability to distinguish between instantaneous faults and permanent faults.

[0048] (2) The present invention configures two types of parameter items, namely centralized FA and local FA, for all switches on the distribution line, enabling the line to have the ability to convert between centralized FA and local FA. Under normal circumstances, the line operates in the centralized FA mode. When a permanent fault occurs at any position on the line, the distribution automation master station first issues a "general call" command to all terminals on this line to confirm the communication status between the terminals and the master station. When it is found that there are terminals with dropped connections, the master station automatically switches to the local FA operation mode to prevent the expansion of the fault isolation range due to dropped terminal connections.

[0049] (3) The method of the present invention is practical and simple. It can handle line faults in the case where the main and distribution network information systems cannot be interconnected and terminals are dropped, improving the operation reliability of the distribution line and reducing the outage time of the distribution line. BRIEF DESCRIPTION OF THE DRAWINGS

[0050] In order to more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the following will briefly describe the drawings required in the embodiments. By referring to the drawings, the features and advantages of the present invention will be more clearly understood. The drawings are schematic and should not be construed as imposing any limitations on the present invention. For those of ordinary skill in the art, other drawings can be obtained based on these drawings without creative efforts. Among them:

[0051] Figure 1 It is a flowchart of a feeder automation processing method for mutual conversion between centralized type and local type provided in the embodiment;

[0052] Figure 2 It is a schematic diagram of the processing process of the distribution line when a permanent fault occurs between the outlet circuit breaker and the first sectional switch in the embodiment;

[0053] Figure 3 It is a schematic diagram of the processing process of the distribution line when an instantaneous fault occurs between the outlet circuit breaker and the first sectional switch in the embodiment;

[0054] Figure 4 It is a schematic diagram of the processing process of the distribution line when a permanent fault occurs between ordinary sectional switches when there are dropped terminals on the distribution line in the embodiment;

[0055] Figure 5 It is a schematic diagram of the processing process of the distribution line when an instantaneous fault occurs between ordinary sectional switches when there are dropped terminals on the distribution line in the embodiment;

[0056] Figure 6 It is a block diagram of a feeder automation processing system for mutual conversion between centralized type and local type provided in the embodiment. DETAILED DESCRIPTION OF THE EMBODIMENTS

[0057] To make the objectives, technical solutions and advantages of the embodiments of the present invention clearer, the technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are some, but not all, of the embodiments of the present invention. All other embodiments obtained by those of ordinary skill in the art based on the embodiments of the present invention without creative efforts shall fall within the protection scope of the present invention.

[0058] Embodiment 1

[0059] As Figure 1 shown, the embodiments of the present invention propose a feeder automation processing method for mutual conversion between centralized type and in-situ type, and the method includes:

[0060] S1: Classify the switch types in the distribution line, and the switch types include line outlet circuit breaker, first sectional switch, ordinary sectional switch, and tie switch;

[0061] S2: Configure all the points required for the two feeder automation operation modes of centralized feeder automation and in-situ feeder automation for all switches except the outlet circuit breaker on the distribution line, and configure two reclosing operations for the outlet circuit breaker;

[0062] S3: Configure the two operation parameters of centralized feeder automation and in-situ feeder automation for the distribution automation master station, and set the three points of residual voltage locking, loss-of-voltage tripping, and delayed closing upon power restoration of the first sectional switch to be effective in both the centralized feeder automation mode and the in-situ feeder automation mode;

[0063] S4: In the distribution automation master station system, add the item of residual voltage locking of the first sectional switch to the start condition of the centralized feeder automation mode, and use the presence of terminal disconnection as the switching condition of the in-situ feeder automation mode, so that the distribution line has the ability to mutually convert between centralized feeder automation and in-situ feeder automation.

[0064] As can be seen from the above technical solution, the present invention provides a feeder automation processing method for mutual conversion between centralized type and in-situ type. First, the first sectional switch of the distribution line is configured with functions of "residual voltage locking", "voltage loss tripping", and "delayed closing upon power restoration", and the occurrence of "residual voltage locking" of the first sectional switch of the distribution line is added to the starting conditions of the centralized FA. Thus, when a fault occurs between the outlet circuit breaker and the first sectional switch of the line without the main and distribution network information systems being connected, the distribution automation master station system can still obtain the fault information in a timely manner, isolate the fault section, and restore the power supply of the non-fault section; and because the first sectional switch is simultaneously configured with functions of "voltage loss tripping" and "delayed closing upon power restoration", the distribution line still has the ability to distinguish between instantaneous faults and permanent faults. Secondly, two types of parameter items, namely centralized FA and in-situ FA, are configured for all switches on the distribution line, enabling the line to have the ability to mutually convert between centralized FA and in-situ FA. Under normal circumstances, the line operates in the centralized FA mode. When it is sensed that a permanent fault occurs at any position on the line, the distribution automation master station first issues a "general call" command to all terminals of this line to confirm the communication status between the terminals and the master station. When it is found that there are terminals with dropped connections, the master station automatically switches to the in-situ FA operation mode to prevent the expansion of the fault isolation range due to terminal disconnection. The method of the present invention is practical and simple, and can handle line faults in the case of non-interoperability of the main and distribution network information systems and terminal disconnection, improving the operation reliability of the distribution line and reducing the outage time of the distribution line.

[0065] In this embodiment, in step S1, the switch types in the distribution line are classified. The switch types include the line outlet circuit breaker, the first sectional switch, the ordinary sectional switch, and the tie switch. Among them, the outlet circuit breaker is the circuit breaker within the substation; the first sectional switch is the first circuit breaker downstream of the outlet circuit breaker. When there are multiple branches downstream, there are multiple first sectional switches; the ordinary sectional switch is all sectional switches except the first sectional switch; the tie switch is the switch connecting two distribution lines, and its normal state is open.

[0066] In this embodiment, in step S2, all points required for two feeder automation operation modes, namely centralized FA and in-situ FA, are configured for all switches on the distribution line except the outlet circuit breaker, and two reclosing operations are configured for the outlet circuit breaker.

[0067] In this embodiment, in step S3, two operation parameters, namely centralized FA and in-situ FA, are configured for the distribution automation master station, and three points of residual voltage locking, voltage loss tripping, and delayed closing upon power restoration of the first sectional switch are set to be valid in both the centralized FA and in-situ FA modes.

[0068] The present invention enables a line to have the ability to mutually convert between centralized FA and local FA by configuring two types of parameter items, namely centralized FA and local FA, for all switches on the distribution line. Under normal circumstances, the line operates in the centralized FA mode. When a permanent fault occurs at any position on the line, the distribution automation master station first issues a "general call" command to all terminals on this line to confirm the communication status between the terminals and the master station. When it is found that there are terminals with dropped connections, the master station automatically switches to the local FA operation mode to prevent the expansion of the fault isolation range due to terminal disconnections.

[0069] In this embodiment, in step S4, in the distribution automation master station system, a residual voltage locking item of the first sectionalizing switch is added to the start-up conditions of the centralized FA mode, and the existence of terminal disconnections is used as the switching condition for the local FA mode, so that the distribution line has the ability to mutually convert between centralized FA and local FA.

[0070] The present invention adds the occurrence of "residual voltage locking" of the first sectionalizing switch on the distribution line to the start-up conditions of the centralized FA. Thus, when a fault occurs between the outlet circuit breaker and the first sectionalizing switch on the line without the main and distribution network information systems being connected, the distribution automation master station system can still obtain the fault information in a timely manner, isolate the fault section, and restore power supply to the non-fault sections. Moreover, since the first sectionalizing switch is configured with functions of "under-voltage tripping" and "delayed closing upon power restoration" at the same time, the distribution line still has the ability to distinguish between instantaneous faults and permanent faults.

[0071] Specifically, the mutual conversion process between centralized feeder automation and local feeder automation specifically includes:

[0072] Under normal circumstances, the distribution line is set to operate in the centralized FA mode;

[0073] When a permanent fault occurs between the outlet circuit breaker and the first sectionalizing switch, the outlet circuit breaker trips due to overcurrent, the first section loses voltage and trips, then the outlet circuit breaker fails to reclose and locks, and the first sectionalizing switch has residual voltage locking due to detecting instantaneous power restoration;

[0074] When the distribution automation master station system receives the residual voltage locking tele-signal sent by the first sectionalizing switch, it immediately starts the centralized FA processing flow. After confirming that the outlet circuit breaker and the first sectionalizing switch are in the tripped state, the distribution automation master station issues a closing command to the tie switch to complete the location isolation of the fault area and the restoration of power supply to the non-fault area;

[0075] When an instantaneous fault occurs between the outlet circuit breaker and the first sectionalizing switch, the outlet circuit breaker trips due to overcurrent, the first section loses voltage and trips, then the outlet circuit breaker recloses successfully, and the first sectionalizing switch closes successfully after a delay;

[0076] When the main distribution automation station system receives information about a permanent fault at any location, except for the fault information between the outlet circuit breaker and the first sectionalizing switch on the line, a general call command is sent to all terminals on the distribution line. If there is a terminal dropout, a telemetry signal indicating the terminal dropout is sent up.

[0077] If the main distribution automation station receives a telemetry signal indicating a terminal dropout, the distribution line automatically switches to the local FA operation mode.

[0078] To better illustrate the advantages of the present invention, the following will be described in conjunction with specific faults on the distribution line.

[0079] 1. When a permanent fault occurs between the outlet circuit breaker and the first sectionalizing switch, the processing procedure of the distribution line specifically includes:

[0080] 1.1. The line is normally powered, as shown in Figure 2 (a).

[0081] 1.2. When a permanent fault occurs at point F1 between the outlet circuit breaker CB1 and the first sectionalizing switch FS11, the main distribution automation station receives the fault telemetry information. The outlet circuit breaker CB1's protection operates and trips, and the first sectionalizing switch FS11 opens due to loss of voltage, as shown in Figure 2 (b).

[0082] 1.3. The substation outlet circuit breaker CB1 performs a single reclosing, as shown in Figure 2 (c).

[0083] 1.4. Since the closing is on the fault point, the outlet circuit breaker CB1's protection operates and trips again. Since the closing time is less than Y time, the outlet circuit breaker CB1 is blocked and no second reclosing is performed. At the same time, the first sectionalizing switch FS11 is blocked because it detects the instantaneous residual voltage, completing the fault point location and isolation, as shown in Figure 2 (d).

[0084] 1.5. The blocked telemetry signal of the first sectionalizing switch FS11 is sent up to the main distribution automation station. The main distribution automation station determines that the fault occurs between the outlet circuit breaker CB1 and the first sectionalizing switch FS11, and starts the feeder automation processing program to close the tie switch LS to complete the power supply to the non-fault area, as shown in Figure 2 (e).

[0085] 2. When an instantaneous fault occurs between the outlet circuit breaker and the first sectionalizing switch, the processing procedure of the distribution line specifically includes:

[0086] 2.1. The distribution line is normally powered, as shown in Figure 3 (a);

[0087] 2.2. When an instantaneous fault occurs at point F1 between the outlet circuit breaker CB1 and the first sectionalizing switch FS11, the distribution automation master station receives the fault tele-signaling information. The protection of the outlet circuit breaker CB1 operates and trips, and the first sectionalizing switch FS11 opens due to loss of voltage, as shown in Figure 3 (b);

[0088] 2.3. The substation outlet circuit breaker CB1 performs a single reclosing. Since the fault between the outlet circuit breaker CB1 and the first sectionalizing switch FS11 has disappeared, the outlet circuit breaker CB1 recloses successfully, as shown in Figure 3 (c);

[0089] 2.4. After 7 s, the first sectionalizing switch FS11 closes successfully after a time delay, as shown in Figure 3 (d).

[0090] 3. When there is a terminal disconnection in the distribution line and a permanent fault occurs between ordinary sectionalizing switches, the specific process of the distribution line handling includes:

[0091] 3.1. The distribution line is normally powered, as shown in Figure 4 (a);

[0092] 3.2. When a permanent fault occurs at point F2 between the ordinary sectionalizing switch FS12 and the ordinary sectionalizing switch FS13, the distribution automation master station receives the fault tele-signaling information. The distribution automation master station starts the general call program, discovers that the ordinary sectionalizing switch FS12 is offline, and randomly switches to the local type feeder automation operation mode, as shown in Figure 4 (b);

[0093] 3.3. The substation outlet circuit breaker CB1 detects the line fault, and the protection operates and trips. All the voltage-type switches on the distribution line side of the outlet circuit breaker CB1 open due to loss of voltage. At the same time, the tie switch LS starts the X-time countdown due to unilateral loss of voltage, as shown in Figure 4 (c);

[0094] 3.4. The outlet circuit breaker CB1 performs the first reclosing. After 7 s, the first sectionalizing switch FS11 closes when power is restored. After another 7 s, the ordinary sectionalizing switch FS12 closes when power is restored and closes on the fault point, as shown in Figure 4 (d);

[0095] 3.5. The outlet circuit breaker CB1 protects and operates and trips again. The first sectionalizing switch FS11, the ordinary sectionalizing switch FS12, and the ordinary sectionalizing switch FS13 open due to loss of voltage, and the ordinary sectionalizing switch FS12 and the ordinary sectionalizing switch FS13 are blocked, as shown in Figure 4 (e);

[0096] 3.6. The circuit breaker CB1 at the substation outlet undergoes a second reclosing. After 7 seconds, the first sectionalizing switch FS11 on the distribution line side of the outlet circuit breaker CB1 closes, as shown in Figure 4 (f);

[0097] 3.7. When the X - time countdown of the tie switch LS ends, it automatically closes to restore power supply to the non - fault section, as shown in Figure 4 (g).

[0098] 4. When there is a terminal disconnection in the distribution line and an instantaneous fault occurs between ordinary sectionalizing switches, the specific process of the distribution line handling includes:

[0099] 4.1. The distribution line is normally powered, as shown in Figure 5 (a);

[0100] 4.2. When an instantaneous fault occurs at point F2 between the ordinary sectionalizing switch FS12 and the ordinary sectionalizing switch FS13, the distribution automation master station receives the fault tele - signal information. The distribution automation master station starts the general call program, discovers that the ordinary sectionalizing switch FS12 is offline, and randomly switches to the local - type feeder automation operation mode, as shown in Figure 5 (b);

[0101] 4.3. The circuit breaker CB1 at the substation outlet detects a line fault, the protection acts to trip. All the voltage - type switches on the distribution line side of the outlet circuit breaker CB1 open due to loss of voltage. At the same time, the tie switch LS starts the X - time countdown due to single - sided loss of voltage, as shown in Figure 5 (c);

[0102] 4.4. The circuit breaker CB1 at the substation outlet undergoes the first reclosing. After 7 seconds, the first sectionalizing switch FS11 is energized and closes. After another 7 seconds, the ordinary sectionalizing switch FS12 is energized and closes. Since the fault at point F2 has disappeared, after another 7 seconds, the ordinary sectionalizing switch FS13 is energized and closes, and the line resumes normal power supply, as shown in Figure 5 (d).

[0103] Embodiment 2

[0104] As shown in Figure 6 , the present invention provides a FA processing system for mutual conversion between centralized type and local type. The system is used to implement the FA processing method for mutual conversion between centralized type and local type described in Embodiment 1, and specifically includes:

[0105] The switch type division module 10 is used to divide the switch types in the distribution line. The switch types include the line outlet circuit breaker, the first sectionalizing switch, the ordinary sectionalizing switch, and the tie switch;

[0106] The switch configuration module 20 is used to configure all the points required for the two FA operation modes of centralized FA and local FA for all switches on the distribution line except the outlet circuit breaker, and configure two reclosing operations for the outlet circuit breaker;

[0107] The master station configuration module 30 is used to configure the two operation parameters of centralized FA and local FA for the distribution automation master station, and set that the three points of residual voltage locking, loss-of-voltage tripping, and delayed closing when power is restored of the first sectionalizing switch are effective in both the centralized FA and local FA modes;

[0108] The condition setting module 40 is used to add the item of residual voltage locking of the first sectionalizing switch to the start condition of the centralized FA mode in the distribution automation master station system, and use the presence of terminal disconnection as the switching condition of the local FA mode, so that the distribution line has the ability to mutually convert between centralized FA and local FA.

[0109] A FA processing system for mutual conversion between centralized type and local type in this embodiment is used to implement the foregoing FA processing method for mutual conversion between centralized type and local type. Therefore, the specific implementation manners in the FA processing system for mutual conversion between centralized type and local type can be seen in the embodiment part of the foregoing FA processing method for mutual conversion between centralized type and local type. For example, the switch type division module 10, the switch configuration module 20, the master station configuration module 30, and the condition setting module 40 are respectively used to implement steps S1, S2, S3, and S4 in the foregoing FA processing method for mutual conversion between centralized type and local type. Therefore, the specific implementation manners can refer to the descriptions of the corresponding various part embodiments. To avoid redundancy, they will not be elaborated here.

[0110] Embodiment III

[0111] The embodiment of the present invention further provides an electronic device, which includes a processor, a memory, and a bus system. The processor and the memory are connected through the bus system. The memory is used to store instructions, and the processor is used to execute the instructions stored in the memory to implement the foregoing FA processing method for mutual conversion between centralized type and local type.

[0112] Embodiment IV

[0113] The embodiment of the present invention further provides a computer storage medium, which stores a computer software product. The computer software product includes several instructions for causing a computer device to execute the foregoing FA processing method for mutual conversion between centralized type and local type.

[0114] Those skilled in the art should understand that the embodiments of the present application can be provided as a method, a system, or a computer program product. Therefore, the present application can take the form of a complete hardware embodiment, a complete software embodiment, or an embodiment combining software and hardware aspects. Moreover, the present application can take the form of a computer program product implemented on one or more computer-usable storage media (including but not limited to disk storage, CD-ROM, optical storage, etc.) containing computer-usable program code.

[0115] The present application is described with reference to the flowcharts and / or block diagrams of methods, apparatuses (systems), and computer program products according to the embodiments of the present application. It should be understood that each flow and / or block in the flowchart and / or block diagram, and the combination of flows and / or blocks in the flowchart and / or block diagram, can be realized by computer program instructions. These computer program instructions can be provided to the processor of a general-purpose computer, a special-purpose computer, an embedded processor, or other programmable data processing devices to generate a machine, so that the instructions executed by the processor of the computer or other programmable data processing devices generate a device for realizing the functions specified in Figure 1 one or more of the flows Figure 1 or a plurality of flows and / or blocks

[0116] These computer program instructions can also be stored in a computer-readable memory that can direct a computer or other programmable data processing device to work in a specific manner, so that the instructions stored in the computer-readable memory generate a manufactured article including an instruction device, and the instruction device realizes the functions specified in Figure 1 one or more of the flows Figure 1 or a plurality of flows and / or blocks Figure 1 or a plurality of blocks. These computer program instructions can also be loaded onto a computer or other programmable data processing device, so that a series of operation steps are executed on the computer or other programmable device to generate a computer-implemented process. Thus, the instructions executed on the computer or other programmable device provide steps for realizing the functions specified in Figure 1 one or more of the flows

[0117] Obviously, the above embodiments are only examples for clear illustration and are not limitations on the implementation manners. For those of ordinary skill in the art, other different forms of changes or variations can be made based on the above description. It is not necessary and impossible to list all the implementation manners here. And the obvious changes or variations derived therefrom are still within the protection scope of the present invention.

Claims

1. A feeder automation processing method for mutual conversion between centralized type and in-situ type, characterized in that, it includes: Dividing the switch types in the distribution line, and the switch types include line outlet circuit breakers, the first sectionalizing switch, ordinary sectionalizing switches, and tie switches; Configuring all points required for two feeder automation operation modes of centralized feeder automation and in-situ feeder automation for all switches except the outlet circuit breaker on the distribution line, and configuring two reclosing operations for the outlet circuit breaker; Configuring two operation parameters of centralized feeder automation and in-situ feeder automation for the distribution automation master station, and setting that the three points of residual voltage locking, loss-of-voltage tripping, and delayed closing upon power restoration of the first sectionalizing switch are effective in both the centralized feeder automation mode and the in-situ feeder automation mode; In the distribution automation master station system, adding the item of residual voltage locking of the first sectionalizing switch to the start condition of the centralized feeder automation mode, and taking the presence of terminal disconnection as the switching condition of the in-situ feeder automation mode, so that the distribution line has the ability to mutually convert between centralized feeder automation and in-situ feeder automation; Among them, the mutual conversion process between centralized feeder automation and in-situ feeder automation specifically includes: Under normal circumstances, set the distribution line to operate in the centralized feeder automation mode; When a permanent fault occurs between the outlet circuit breaker and the first sectionalizing switch, the outlet circuit breaker trips due to overcurrent, the first section loses voltage and trips, then the outlet circuit breaker fails to reclose and locks, and the first sectionalizing switch locks due to detecting instantaneous power restoration; When the distribution automation master station system receives the residual voltage locking tele-signal sent by the first sectionalizing switch, immediately start the centralized feeder automation processing process. After confirming that the outlet circuit breaker and the first sectionalizing switch are in the tripped state, the distribution automation master station issues a closing command to the tie switch to complete the location isolation of the fault area and the restoration of power supply to the non-fault area; When an instantaneous fault occurs between the outlet circuit breaker and the first sectionalizing switch, the outlet circuit breaker trips due to overcurrent, the first section loses voltage and trips, then the outlet circuit breaker recloses successfully, and the first sectionalizing switch closes successfully after a delay; When the distribution automation master station system receives permanent fault information at any position, except for the fault information between the outlet circuit breaker and the first sectionalizing switch on the line, send a general call command to all terminals on the distribution line. If there is a terminal disconnection, then send a tele-signal indicating the presence of terminal disconnection; If the distribution automation master station receives the tele-signal indicating the presence of terminal disconnection, the distribution line automatically switches to the in-situ feeder automation operation mode.

2. The feeder automation processing method for mutual conversion between centralized type and in-situ type according to claim 1, characterized in that, The outlet circuit breaker is a substation circuit breaker; the first sectionalizing switch is the first circuit breaker downstream of the outlet circuit breaker. When there are multiple branches downstream, there are multiple first sectionalizing switches; the ordinary sectionalizing switches are all sectionalizing switches except the first sectionalizing switch; the tie switch is a switch connecting two distribution lines, and its normal state is open.

3. The feeder automation processing method for mutual conversion between centralized type and in-situ type according to claim 1, characterized in that, When a permanent fault occurs between the outlet circuit breaker and the first sectionalizing switch, the distribution line handling process specifically includes: When a permanent fault occurs at point F1 between the outlet circuit breaker CB1 and the first sectionalizing switch FS11, the distribution automation master station receives the fault tele-signaling information. The protection of the outlet circuit breaker CB1 operates and trips, and the first sectionalizing switch FS11 opens due to loss of voltage. The substation outlet circuit breaker CB1 performs a single reclosing operation. Since it is closed onto the fault point, the outlet circuit breaker CB1's protection operates and trips again. Because the closing time is less than time Y, the outlet circuit breaker CB1 is blocked and no second reclosing operation is performed. At the same time, the first sectionalizing switch FS11 is blocked because it detects the instantaneous residual voltage, completing the fault point location and isolation. The blocked tele-signaling of the first sectionalizing switch FS11 is sent up to the distribution automation master station. The distribution automation master station determines that the fault occurs between the outlet circuit breaker CB1 and the first sectionalizing switch FS11, and starts the feeder automation handling procedure, closing the tie switch LS to complete the power supply to the non-fault area.

4. The feeder automation handling method for mutual conversion between centralized type and local type according to claim 1, characterized in that, When an instantaneous fault occurs between the outlet circuit breaker and the first sectionalizing switch, the distribution line handling process specifically includes: When an instantaneous fault occurs at point F1 between the outlet circuit breaker CB1 and the first sectionalizing switch FS11, the distribution automation master station receives the fault tele-signaling information. The protection of the outlet circuit breaker CB1 operates and trips, and the first sectionalizing switch FS11 opens due to loss of voltage. The substation outlet circuit breaker CB1 performs a single reclosing operation. Since the fault between the outlet circuit breaker CB1 and the first sectionalizing switch FS11 has disappeared, the outlet circuit breaker CB1 recloses successfully. The first sectionalizing switch FS11 closes successfully after a 7s delay.

5. The feeder automation handling method for mutual conversion between centralized type and local type according to claim 1, characterized in that, When there is a terminal disconnection situation in the distribution line and a permanent fault occurs between ordinary sectionalizing switches, the distribution line handling process specifically includes: When a permanent fault occurs at point F2 between the ordinary sectionalizing switch FS12 and the ordinary sectionalizing switch FS13, the distribution automation master station receives the fault tele-signaling information. The distribution automation master station starts the general call program and finds that the ordinary sectionalizing switch FS12 is disconnected, and randomly switches to the local type feeder automation operation mode. The substation outlet circuit breaker CB1 detects the line fault, and its protection operates and trips. All the voltage-type switches on the distribution line side of the outlet circuit breaker CB1 open due to loss of voltage. At the same time, the tie switch LS starts a countdown of time X due to unilateral loss of voltage. The outlet circuit breaker CB1 performs the first reclosing operation. After 7s, the first sectionalizing switch FS11 closes when power is restored. After another 7s, the ordinary sectionalizing switch FS12 closes when power is restored and closes onto the fault point. The outlet circuit breaker CB1's protection operates and trips again. The first sectionalizing switch FS11, the ordinary sectionalizing switch FS12, and the ordinary sectionalizing switch FS13 open due to loss of voltage, and the ordinary sectionalizing switch FS12 and the ordinary sectionalizing switch FS13 are blocked. The second reclosing of the substation outlet circuit breaker CB1, and 7 seconds later, the first sectionalizing switch FS11 on the distribution line side of the outlet circuit breaker CB1 closes; The countdown of the X time of the tie switch LS ends, and it automatically closes to restore power supply to the non-faulty section.

6. The centralized and local type conversion feeder automation processing method according to claim 1, characterized in that, when there is a terminal disconnection in the distribution line and an instantaneous fault occurs between ordinary sectionalizing switches, the specific process of the distribution line processing includes: When an instantaneous fault occurs at point F2 between the ordinary sectionalizing switch FS12 and the ordinary sectionalizing switch FS13, the distribution automation master station receives the fault telemetry information, starts the total call program, and finds that the ordinary sectionalizing switch FS12 is disconnected, and randomly switches to the local type feeder automation operation mode; The substation outlet circuit breaker CB1 detects a line fault, the protection operates and trips, all voltage type switches on the distribution line side of the outlet circuit breaker CB1 open due to loss of voltage, and at the same time, the tie switch LS starts the X time countdown due to unilateral loss of voltage; The first reclosing of the outlet circuit breaker CB1, 7 seconds later, the first sectionalizing switch FS11 closes when power is restored, and after another 7 seconds, the ordinary sectionalizing switch FS12 closes when power is restored. Since the fault at point F2 has disappeared, after another 7 seconds, the ordinary sectionalizing switch FS13 closes when power is restored, and the line resumes normal power supply.

7. A feeder automation processing system for mutual conversion between centralized and local types, characterized in that, the system is used to implement the centralized and local type conversion feeder automation processing method described in any one of claims 1 to 6, and specifically includes: A switch type division module for dividing the switch types in the distribution line, and the switch types include line outlet circuit breakers, first sectionalizing switches, ordinary sectionalizing switches, and tie switches; A switch configuration module for configuring all points required for the two feeder automation operation modes of centralized feeder automation and local type feeder automation for all switches except the outlet circuit breaker on the distribution line, and configuring two reclosings for the outlet circuit breaker; A master station configuration module for configuring two operation parameters of centralized feeder automation and local type feeder automation for the distribution automation master station, and setting the three points of residual voltage locking, loss of voltage tripping, and power-on delay closing of the first sectionalizing switch to be valid in both the centralized feeder automation and local type feeder automation modes; A condition setting module for adding the item of residual voltage locking of the first sectionalizing switch to the start condition of the centralized feeder automation mode in the distribution automation master station system, and taking the existence of terminal disconnection as the switching condition of the local type feeder automation mode, so that the distribution line has the ability to mutually convert between centralized feeder automation and local type feeder automation.

8. An electronic device, characterized in that, the electronic device includes a processor, a memory and a bus system, the processor and the memory are connected through the bus system, the memory is used to store instructions, and the processor is used to execute the instructions stored in the memory to implement the centralized and local type conversion feeder automation processing method described in any one of claims 1 to 6.

9. A computer storage medium, characterized in that, the computer storage medium stores a computer software product, and the computer software product includes a number of instructions for causing a computer device to execute the centralized and in-situ type conversion feeder automation processing method according to any one of claims 1 to 6.

Images