CN115622008A - On-site feeder automation fault processing method and device integrating acceleration protection - Google Patents
On-site feeder automation fault processing method and device integrating acceleration protection Download PDFInfo
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- CN115622008A CN115622008A CN202211404297.9A CN202211404297A CN115622008A CN 115622008 A CN115622008 A CN 115622008A CN 202211404297 A CN202211404297 A CN 202211404297A CN 115622008 A CN115622008 A CN 115622008A
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02H—EMERGENCY PROTECTIVE CIRCUIT ARRANGEMENTS
- H02H7/00—Emergency protective circuit arrangements specially adapted for specific types of electric machines or apparatus or for sectionalised protection of cable or line systems, and effecting automatic switching in the event of an undesired change from normal working conditions
- H02H7/26—Sectionalised protection of cable or line systems, e.g. for disconnecting a section on which a short-circuit, earth fault, or arc discharge has occured
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02J—CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
- H02J3/00—Circuit arrangements for ac mains or ac distribution networks
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Abstract
The invention belongs to the technical field of power transmission and distribution, and discloses a method and a device for processing local feeder automation faults with fusion acceleration protection, wherein the method comprises the following steps: when a power supply line fails, the outgoing line switch of the transformer substation is tripped in a protection mode, and the section switch of the power supply line is not switched off; reclosing of the outgoing line switch; if the fault is a permanent fault, the section switch before the fault point is not subjected to delay brake opening, and the section switch after the fault point detects one-time short-time incoming call time brake opening; the section switch before the fault point is sequentially switched on in a delayed mode, after the section switch is switched on to the fault point, the section switch immediately before the fault point is switched off again and is locked in the forward direction, and power supply of an upstream non-fault section is recovered; and the section switch next to the fault point detects the short-time incoming call again and reversely locks to finish fault processing. The method solves the problems of more switch action times, long power failure time or longer fault processing time in the transient fault existing in the voltage time type feeder automation in the prior art.
Description
Technical Field
The invention relates to the technical field of power transmission and distribution, in particular to a method and a device for processing local feeder automation faults with fusion of acceleration protection.
Background
The distribution network is directly connected with power users, and is a key link for guaranteeing the ' distribution of power and the ' use of power '. Along with the promotion of the rapid development of economic society to the power supply demand, the distribution network deepens into city and rural broad area, has characteristics such as equipment numerous, structure complicacy, operational environment are changeable, and the fault incidence is higher. The method has the advantages of quickly, accurately and reliably processing the faults of the power distribution network, and has important significance for improving the power supply reliability of the power distribution network and realizing the reliable operation of the power distribution network. In order to accelerate the processing speed of the faults of the power distribution network, power distribution automation systems are widely built and deployed at home and abroad, and the automatic fault processing is realized by feeder automation. Feeder automation can be divided into two broad categories, centralized and in-situ, depending on implementation. The centralized feeder automation is that after a line fails, a distribution automation master station collects the fault information of a line section switch, intensively studies and judges fault sections, and the action of a remote switch is isolated. The in-situ feeder automation is matched with automatic fault isolation through a circuit switch, does not depend on the research and judgment of a master station, and has the advantages of simplicity in implementation and high reliability.
At present, various on-site feeder automation technologies exist, including communication-independent on-site overlapping types such as a voltage-time type, a voltage-current type, a self-adaptive integration type and a communication-dependent intelligent distribution type, wherein the on-site overlapping type feeder automation does not depend on communication, can realize fault processing through automatic matching between switches, and is widely applied to power distribution networks. Due to the fact that partial switches are long in closing time and voltage and current type application configuration is complex in self-adaptive comprehensive type configuration, most of on-site feeder automation of the existing 10kV distribution line is of a voltage time type. The voltage time type section switch adopts the logic of 'no-voltage opening and power-on delay closing', when a fault occurs, the substation outlet switch is used for tripping under protection, all the voltage time type switches on the line are switched off under no-voltage, the outlet switch is reclosed, the voltage time type switches are switched on step by step after delay, and the substation trips again after the outlet switch is switched on to a fault section, so that the fault section is isolated.
The voltage time type feeder automation mainly has the following problems: (1) After the outgoing line switch trips, the section switch is not subjected to selective voltage loss brake separation and then is overlapped step by step, and the switch has more action times and long power failure time during instantaneous fault. (2) The time limit of the section switch X and the time limit of the section switch Y are 7s/5s, and the fault processing time is longer. Therefore, there is a need to provide a new on-site feeder automation fault handling method, which solves the above problems and improves the fault handling level of the power distribution network.
Disclosure of Invention
The embodiment of the invention provides an on-site feeder automation fault processing method and device integrating acceleration protection, and aims to solve the problems of multiple switch action times, long power failure time or long fault processing time in instantaneous fault in voltage time feeder automation in the prior art. The following presents a simplified summary in order to provide a basic understanding of some aspects of the disclosed embodiments. This summary is not an extensive overview and is intended to neither identify key/critical elements nor delineate the scope of such embodiments. Its sole purpose is to present some concepts in a simplified form as a prelude to the more detailed description that is presented later.
According to a first aspect of the embodiments of the present invention, there is provided a method for local feeder automation fault handling with fusion acceleration protection, including:
when a power supply line fails, the outgoing line switch of the transformer substation is tripped in a protection mode, and the section switch of the power supply line is not switched off; after the first time length, the outgoing line switch is reclosed;
if the fault is a permanent fault:
the section switch before the fault point is not subjected to time delay brake opening, and the section switch after the fault point detects one-time short-time incoming call time brake opening;
sequentially delaying X time limit switching-on by the section switch before the fault point, switching-off again and positively locking by the section switch immediately before the fault point after switching-on to the fault point so as to isolate the front end of the section where the fault point is positioned and recover the power supply of the upstream non-fault section;
and the section switch next to the fault point detects the short-time incoming call again and reversely locks to isolate the rear end of the section where the fault point is located and complete fault processing.
In one embodiment, in the method, the section switch before the fault point is not subjected to time delay switching-off, and the step of detecting a short-time incoming call time switching-off by the section switch after the fault point further comprises:
the section switch is provided with acceleration protection without time delay so as to realize the section switch non-delay brake-off before the fault point.
In one embodiment, the acceleration protection in the method comprises phase overcurrent protection, zero sequence overcurrent protection and small current grounding transient direction protection.
In one embodiment, in the method, the sectionalizing switch before the fault point is not subjected to time-delay switching-off, and the step of detecting one-time short-time incoming call time switching-off by the sectionalizing switch after the fault point further comprises the following steps:
the duration of the short-time incoming call is less than X time limit.
In one embodiment, the method includes the steps that a section switch before a fault point is sequentially switched on in a time-delay X time limit manner, and after the section switch before the fault point is switched on, the section switch immediately before the fault point is switched off again and is switched off in a forward direction, and the method further includes the following steps:
and the section switch is provided with an acceleration protection after closing so as to realize the secondary opening and forward locking of the section switch close to the fault point.
In one embodiment, the post-closing acceleration protection in the method comprises phase-sequence overcurrent acceleration, zero-sequence overcurrent acceleration and zero-sequence voltage acceleration.
In one embodiment, the method includes the steps that a section switch before a fault point is sequentially switched on in a time-delay X time limit manner, and after the section switch before the fault point is switched on, the section switch immediately before the fault point is switched off again and is switched off in a forward direction, and the method further includes the following steps:
after the section switch is switched on to the fault point, the section switch close to the fault point accelerates to protect switching-off within a second time length, and the switching-off time length of the section switch close to the fault point is less than Y time length, so that forward locking is realized.
In one embodiment, the step of detecting the short-time incoming call again by the section switch immediately after the fault point in the method and locking the section switch reversely further comprises the following steps:
the time length of the short-time incoming call is less than X time limit so as to realize reverse locking.
In one embodiment, the step of detecting the short-time incoming call back locking again by the section switch immediately after the fault point in the method further comprises the following steps:
and after the voltage of the single side of the interconnection switch of the power supply line is lost, the connection switch is switched on after the third time length is reached.
In one embodiment, the step of detecting the short-time incoming call again by the section switch immediately after the fault point in the method and locking the section switch reversely further comprises the following steps:
and the section switches behind the section where the fault point is located are sequentially switched on in a delayed mode through X time limit so as to recover the power supply of the downstream non-fault section and finish fault processing.
In one embodiment, the method wherein the X time limit is 3s.
In one embodiment, the method has a Y time limit of 2s.
In one embodiment, the second duration in the method is no greater than 100ms.
According to a second aspect of the embodiments of the present invention, there is provided an in-place feeder automation fault handling apparatus incorporating accelerated protection.
In one embodiment, the device comprises an outgoing switch action module, a section switch opening module, a front-end isolation module and a back-end isolation module; wherein, the first and the second end of the pipe are connected with each other,
the outgoing switch action module is used for tripping the outgoing switch of the transformer substation in a protection mode when a power supply line fails, and a section switch of the power supply line is not switched off; after the first time period, the outgoing line switch is reclosed;
the section switch opening module is used for enabling the section switch in front of a fault point to be opened without delay when the fault is a permanent fault, and the section switch behind the fault point is opened when detecting a short-time incoming call;
the front end isolation module is used for sequentially delaying the time-limited switching-on of the section switch in front of the fault point by X, switching off the section switch in front of the fault point and locking the section switch in the forward direction again after the section switch is switched on to the fault point so as to isolate the front end of the section where the fault point is located and recover the power supply of the upstream non-fault section;
and the rear end isolation module is used for enabling the section switch which is next to the fault point to reversely lock when detecting the short-time incoming call again so as to isolate the rear end of the section where the fault point is located and finish fault processing.
According to a third aspect of embodiments of the present invention, there is provided a computer apparatus.
In some embodiments, the computer device comprises a memory storing a computer program and a processor implementing the steps of the method according to the first aspect when executing the computer program.
According to a fourth aspect of embodiments of the present invention, there is provided a computer-readable storage medium.
In some embodiments, a computer program is stored on a computer readable storage medium; the computer program is executed by a processor to implement the steps of the method according to the first aspect.
The technical scheme provided by the embodiment of the invention can have the following beneficial effects:
the invention provides an on-site feeder automation fault processing method integrating accelerated protection, wherein a line section switch applies a distribution primary and secondary integration breaker and adopts logic of 'no-break-under-voltage and fault accelerated protection break-off in incoming call detection'. For instantaneous faults, the power supply of the whole line can be recovered by one-time reclosing of the outgoing line switch of the transformer substation, and the power failure time is greatly reduced. For permanent faults, when the outgoing line switch is reclosed, the switch before the fault detects the fault to accelerate protection switching-off, and then fault sections are reclosed and isolated step by step. By adopting the method, the outgoing switch only needs one reclosing, the action times of the outgoing switch and the sectional switch are less, and the power failure time is short. Compared with voltage time type feeder automation, the sectional switch cancels the no-voltage brake-separating function and reserves the reverse locking function of short-time incoming call (time is less than X time limit) under the brake-separating state.
It is to be understood that both the foregoing general description and the following detailed description are exemplary and explanatory only and are not restrictive of the invention, as claimed.
Drawings
The accompanying drawings, which are incorporated in and constitute a part of this specification, illustrate embodiments consistent with the invention and together with the description, serve to explain the principles of the invention.
Fig. 1 is a flowchart of a method for processing a fault in-place feeder automation with fusion acceleration protection according to an embodiment of the present application;
fig. 2 is a first schematic diagram of line fault processing according to an embodiment of the present application;
fig. 3 is a second schematic diagram of line fault handling according to an embodiment of the present application;
fig. 4 is a third schematic diagram of line fault handling according to an embodiment of the present application;
fig. 5 is a fourth schematic diagram of line fault handling according to an embodiment of the present application;
fig. 6 is a fifth schematic diagram of line fault handling according to an embodiment of the present application;
fig. 7 is a sixth schematic diagram of line fault handling according to an embodiment of the present application;
fig. 8 is a seventh schematic diagram illustrating line fault handling according to an embodiment of the present application;
fig. 9 is an eighth schematic diagram of line fault handling according to an embodiment of the present application;
fig. 10 is a block diagram of an in-situ feeder automation fault handling device incorporating accelerated protection according to an embodiment of the present application;
FIG. 11 is a schematic diagram illustrating a configuration of a computer device, according to an example embodiment.
Detailed Description
The following description and the drawings sufficiently illustrate specific embodiments herein to enable those skilled in the art to practice them. Portions and features of some embodiments may be included in or substituted for those of others. The scope of the embodiments herein includes the full ambit of the claims, as well as all available equivalents of the claims. The terms "first," "second," and the like, herein are used solely to distinguish one element from another without requiring or implying any actual such relationship or order between such elements. In practice, a first element can also be referred to as a second element, and vice versa. Furthermore, the terms "comprises," "comprising," or any other variation thereof, are intended to cover a non-exclusive inclusion, such that a structure, apparatus, or device that comprises a list of elements does not include only those elements but may include other elements not expressly listed or inherent to such structure, apparatus, or device. Without further limitation, an element defined by the phrases "comprising one of 8230; \8230;" 8230; "does not exclude the presence of additional like elements in a structure, device, or apparatus that comprises the element. The embodiments are described in a progressive manner, each embodiment focuses on differences from other embodiments, and the same and similar parts among the embodiments are referred to each other.
Herein, the term "plurality" means two or more, unless otherwise specified.
Fig. 1 shows a flow chart of the method for processing fault of on-site feeder automation with fusion acceleration protection of the present invention, as shown in fig. 1:
s1: when a power supply line fails, the outgoing line switch of the transformer substation is tripped in a protection mode, and the section switch of the power supply line is not switched off; after the first time, the outlet switch is reclosed.
In the specific implementation, when a line fails, the protection action of the substation outgoing line switch trips, and the line section switch does not act.
In specific implementation, the substation outlet switch is reclosed after a certain time, namely the first time, if the fault is an instantaneous fault, the line can be restored to normal operation, and based on the fault, the substation outlet switch is reclosed once, so that full-line power supply can be restored, and the power failure time is greatly reduced.
S2: if the failure is a permanent failure: the section switch before the fault point has no delay brake-off, and the section switch after the fault point detects one-time short-time incoming call time brake-off.
In the specific implementation, if the fault is a permanent fault, all the section switches before the fault point are switched off without time delay; in some embodiments of the present application, when the section switch before the fault point is not delayed to be switched off, the section switch after the fault point detects a short-time incoming call, and all sections are automatically switched off.
In specific implementation, the section switch is configured with non-delay acceleration protection to realize non-delay tripping of the section switch before a fault point, in other words, when the substation outlet switch is reclosed, all the section switches before the fault point have no delay tripping.
Further, the duration of the short-time call in the step is less than the X time limit. Optionally, the X time limit is 3s.
S3: the section switch before the fault point delays X time limit switching-on in sequence, after the switching-on reaches the fault point, the section switch immediately before the fault point is switched off again and is locked in the forward direction, so as to isolate the front end of the section where the fault point is located and recover the power supply of the upstream non-fault section;
in specific implementation, after the section switch before the fault point is subjected to non-delay switching-off, the section switch is sequentially subjected to delay switching-on, and after the section switch close to the fault point is switched on to the fault point, the section switch is subjected to switching-off again and is positively locked, so that the front end isolation of a fault section and the power supply of an upstream non-fault section are realized.
In specific implementation, the sectionalizing switch is configured with post-closing acceleration protection to realize that the sectionalizing switch immediately before the fault point is opened again and locked forward, in other words, after the sectionalizing switch immediately before the fault point is closed to the fault point, the sectionalizing switch is opened again and locked forward, and the implementation method is that the sectionalizing switch is configured with post-closing acceleration protection, wherein the post-closing acceleration protection comprises: phase over-current acceleration, zero-sequence over-current acceleration, and zero-sequence voltage acceleration.
In specific implementation, after the switch is switched on to a fault point, the section switch immediately before the fault point accelerates to protect switching-off within a period of time, namely within a second period of time, and the switching-off time of the section switch immediately before the fault point is less than Y time limit from the last switching-on time, so that forward locking is realized. Optionally, the Y time limit is 2s, and the second time duration is not greater than 100ms.
S4: and the section switch next to the fault point detects the short-time incoming call again and reversely locks to isolate the rear end of the section where the fault point is located and complete fault processing.
In specific implementation, when the section switch before the fault point is subjected to non-delay brake opening, the section switch after the fault point detects a short-time incoming call, and all the section switches are automatically opened; when the section switch before the fault point is switched on and the fault is switched off again, the section switch next to the fault point detects a short-time incoming call again, and the section switch is automatically locked reversely to realize the isolation of the rear end of the fault section; specifically, the duration of the short-time incoming call is less than the X time limit to realize reverse blocking, in other words, the section switch behind the fault point detects automatic brake opening of the short-time incoming call, and the implementation method is that the incoming call time is less than the X time limit.
In specific implementation, after the single side of a connection switch of a power supply line loses voltage, the connection switch is automatically switched on after a set time delay reaches a third time. And the section switches behind the section where the fault point is located are sequentially switched on in a delayed mode through X time limit so as to recover the power supply of the downstream non-fault section and finish fault processing.
To sum up, the method provided by the embodiment of the present application can realize the following functions:
and after voltage loss, closing the position to carry out fault detection and accelerated protection. The function is matched with the reclosing of the outgoing line switch, and when the outgoing line switch is reclosed, the sectional switch is switched on before the fault and the fault is detected by an incoming call to accelerate the protection of the opening, so that the outgoing line switch is prevented from tripping again. The function supports phase overcurrent protection, zero sequence overcurrent protection and small current grounding protection, and the protection action has no time delay.
And closing the switch after voltage loss for a short time to switch off the switch. When the outgoing switch is superposed with a fault, the section switch before the fault point is switched off in an accelerating way, and each section switch after the fault point senses 1 time of short-time incoming call and is switched off automatically.
And the unilateral pressure delay closing is realized. When the sectional switch detects that voltage exists on one side in the opening state, the sectional switch is automatically closed in a delayed X time limit (3 s).
And switching on to fault accelerated protection switching off. When the section switch is switched on to a fault, the accelerated protection switching-off of the fault is detected, the protection tripping of the outgoing line switch is avoided, the phase overcurrent protection, the zero sequence overcurrent protection and the small current grounding protection are supported, and the accelerated protection delay can be set.
Short-time closing and positive locking. And the single side of the sectional switch has voltage delay closing, if the switch is opened again within Y time limit (2 s) after the switch is closed, the forward closing is immediately locked, and the single side has voltage and does not have delay closing. The Y time limit is the no fault confirmation time after the switch is closed.
The short-time incoming call is reversely locked in the brake-off state. When the section switch is in a switching-off state, if a short-time incoming call is sensed on one side, and the incoming call time is less than X time limit (3 s) and then the section switch is in power failure, the section switch starts reverse locking, and the section switch is not switched on after the incoming call is pressed on the other side.
To further illustrate the methods proposed in the embodiments of the present application, the present application takes a short circuit fault as an example to describe the operation logic, and those skilled in the art can implement the methods of the embodiments of the present application according to the following examples and by combining the foregoing methods, for example: and processing the single-phase earth fault.
Referring to fig. 2 to 9, cb1 and CB2 are outgoing switches of line 1 and line 2, respectively, LS1 is a tie switch of the two lines, FB1 to FB4 are section switches of line 1, the switches are shown in black to represent closing, white to represent opening, K1 to K5 to represent line sections, and the dotted lines represent omitted line portions of line 2.
In this example, the outgoing switch CB1 protection configuration is: the three-section type overcurrent protection, zero-sequence overcurrent protection and small-current grounding protection are adopted, wherein the overcurrent I section is delayed for 0.12s, the overcurrent II section is delayed for 0.4s, the overcurrent III section is delayed for 0.6s, the zero-sequence overcurrent is delayed for 0.5s, and the small-current grounding protection is delayed for 10s. 1 reclosing time is configured, and the reclosing time is 2s.
Referring to fig. 3 to 9, when a short-circuit fault occurs in the section K3, the local feeder automation fault processing process using the fusion acceleration protection of the present application is as follows:
as shown in fig. 3, after a fault occurs, the outgoing line switch CB1 performs overcurrent protection switching-off, and the section switches FB1 to FB4 keep switching-on;
as shown in fig. 4, after cb12s, namely, after the first time, reclosing is performed, and if the instantaneous fault is successfully reclosed, the normal power supply is recovered on the whole line;
as shown in fig. 5, if the fault is a permanent fault, when the CB1 is overlapped, the front section switches FB1 and FB2 of the fault point are switched on after losing voltage, and the accelerated protection switching-off of the fault current is detected, and meanwhile, the rear section switches FB3 and FB4 of the fault point detect that the short-time power-on is automatically switched off for 1 time;
as shown in fig. 6, the single side of fb1 has voltage, 3s (X time limit) is delayed for switching on, FB2 delays for switching on again for 3s, FB2 switches on until the fault point detects fault current, and the accelerated protection is switched off (within 100ms, i.e. within the second time limit), and since FB2 switches on for a second time less than 2s (Y time limit), the switching off state is locked, so as to realize the isolation of the front end of the fault section, and the non-fault sections K1 and K2 at the upstream of the fault point recover power supply;
as shown in fig. 7, the fb3 short-time incoming call on one side has the incoming call time less than 3s (X time limit), starts the reverse latch, and does not delay the closing when the incoming call on the opposite side, thereby realizing the rear end isolation of the fault section;
as shown in fig. 8, after the one side of the interconnection switch LS1 loses voltage, a delay closing timer is started, and the connection switch is automatically closed after a set delay time, that is, a third time length, is reached, and power supply of a section K5 is recovered;
as shown in fig. 9, the single side of the fb4 has a voltage delay of 3s, namely, X time limit closing, and the power supply of the K4 section is recovered; FB3 is locked in the reverse direction and cannot be switched on again, and the fault handling process is finished.
In summary, the on-site feeder automation fault handling method with integrated accelerated protection provided by the invention adopts the logic of 'no-brake-off under voltage loss and brake-off accelerated protection for incoming call detection fault'. When the 10kV distribution line short-circuit fault and the single-phase earth fault are processed, the outgoing line switch of the transformer substation only needs one reclosing, the automatic positioning and isolation of a fault section and the recovery of power supply of a non-fault section can be achieved, the reclosing times of the outgoing line switch of the transformer substation can be effectively reduced, the fault handling speed is accelerated, and the power failure time of the non-fault section is shortened. After the method is applied, compared with the existing voltage time in-place type feeder automation processing method, the reclosing frequency of the outgoing line switch of the transformer substation, the action frequency of the line section switch and the fault handling time are obviously improved.
It should be understood that, although the steps in the flowchart are shown in order as indicated by the arrows, the steps are not necessarily performed in order as indicated by the arrows. The steps are not limited to being performed in the exact order illustrated and, unless explicitly stated herein, may be performed in other orders. Moreover, at least some of the steps in the figures may include multiple sub-steps or multiple stages that are not necessarily performed at the same time, but may be performed at different times, and the order of performing the sub-steps or stages is not necessarily sequential, but may be performed alternately or alternately with other steps or at least some of the sub-steps or stages of other steps.
Referring to fig. 10, an embodiment of the present application provides a fused accelerated protection in-situ feeder automation fault handling apparatus, which includes an outgoing line switch action module 10, a section switch opening module 20, a front-end isolation module 30, and a back-end isolation module 40; wherein, the first and the second end of the pipe are connected with each other,
the outgoing line switch action module 10 is used for tripping the outgoing line switch of the transformer substation in a protection manner when a power supply line fails, and a section switch of the power supply line is not opened; after the first time length, the outlet switch is reclosed;
the section switch opening module 20 is used for making the section switch before the fault point have no delay opening when the fault is a permanent fault, and the section switch after the fault point detects a short-time incoming call and opens the switch;
the front-end isolation module 30 is configured to sequentially delay the section switch before the fault point by X time limit to switch on, and after the section switch before the fault point is switched on, switch off the section switch immediately before the fault point again and lock the section switch forward to isolate the front end of the section where the fault point is located and recover power supply of the upstream non-fault section;
and the back end isolation module 40 is used for enabling the section switch immediately behind the fault point to reversely lock when detecting the short-time incoming call again so as to isolate the back end of the section where the fault point is located and complete fault processing.
For specific limitations of the on-site feeder automation fault handling apparatus with convergence acceleration protection, reference may be made to the above limitations of the on-site feeder automation fault handling method with convergence acceleration protection, which are not described herein again. The modules in the on-site feeder automation fault handling device with fusion acceleration protection can be wholly or partially realized by software, hardware and a combination thereof. The modules can be embedded in a hardware form or independent from a processor in the computer device, and can also be stored in a memory in the computer device in a software form, so that the processor can call and execute operations corresponding to the modules.
In another embodiment of the present application, a computer device is provided, and the computer device may be a server, and its internal structure diagram may be as shown in fig. 11. The computer device includes a processor, a memory, and a network interface connected by a system bus. Wherein the processor of the computer device is configured to provide computing and control capabilities. The memory of the computer device comprises a nonvolatile storage medium and an internal memory. The non-volatile storage medium stores an operating system, a computer program, and a database. The internal memory provides an environment for the operation of an operating system and computer programs in the non-volatile storage medium. The database of the computer device is used for storing static information and dynamic information data. The network interface of the computer device is used for communicating with an external terminal through a network connection. Which computer program is executed by a processor to carry out the steps in the above-described method embodiments.
Those skilled in the art will appreciate that the architecture shown in fig. 11 is merely a block diagram of some of the structures associated with the inventive arrangements and is not intended to limit the computing devices to which the inventive arrangements may be applied, as a particular computing device may include more or less components than those shown, or may combine certain components, or have a different arrangement of components.
In an embodiment, a computer-readable storage medium is provided, on which a computer program is stored which, when being executed by a processor, carries out the steps of the above-mentioned method embodiments.
It will be understood by those skilled in the art that all or part of the processes of the methods of the embodiments described above can be implemented by hardware instructions of a computer program, which can be stored in a non-volatile computer-readable storage medium, and when executed, can include the processes of the embodiments of the methods described above. Any reference to memory, storage, database or other medium used in embodiments provided herein may include at least one of non-volatile and volatile memory. Non-volatile Memory may include Read-Only Memory (ROM), magnetic tape, floppy disk, flash Memory, optical Memory, or the like. Volatile Memory can include Random Access Memory (RAM) or external cache Memory. By way of illustration and not limitation, RAM can take many forms, such as Static Random Access Memory (SRAM) or Dynamic Random Access Memory (DRAM), among others.
The present invention is not limited to the structures that have been described above and shown in the drawings, and various modifications and changes can be made without departing from the scope thereof. The scope of the invention is limited only by the appended claims.
Claims (16)
1. An in-situ feeder automation fault handling method fused with accelerated protection is characterized by comprising the following steps:
when a power supply line fails, a substation outgoing line switch is tripped out in a protection mode, and a section switch of the power supply line is not opened; after a first time length, the outlet switch is reclosed;
if the fault is a permanent fault, then:
the section switch before the fault point has no delay brake-off, and the section switch after the fault point detects one-time short-time incoming call time brake-off;
the section switch before the fault point is sequentially delayed for X time limit switching-on, after the section switch is switched on to the fault point, the section switch adjacent to the fault point is switched off again and is positively locked, so that the front end of the section where the fault point is located is isolated, and the power supply of an upstream non-fault section is recovered;
and the section switch next to the fault point reversely locks when detecting the short-time incoming call again so as to isolate the rear end of the section where the fault point is located and finish fault processing.
2. The in-place feeder automation fault handling method with integrated acceleration protection according to claim 1, wherein the sectionalizing switch before the fault point is not delayed to open, and the step of detecting a short incoming call time opening by the sectionalizing switch after the fault point further comprises:
and the section switch is provided with acceleration protection without time delay so as to realize the section switch non-delay brake-separating before the fault point.
3. The in-place feeder automation fault handling method fused with acceleration protection according to claim 2, wherein the acceleration protection comprises phase overcurrent protection, zero sequence overcurrent protection, and small current grounding transient direction protection.
4. The method for local feeder automation fault handling with converged acceleration protection according to claim 3, wherein the sectionalizing switch before the fault point is not delayed to be switched off, and the step of detecting a short-time incoming call by the sectionalizing switch after the fault point further comprises:
and the duration of the short-time incoming call is less than the X time limit.
5. The in-situ feeder automation fault handling method integrated with accelerated protection according to claim 4, wherein the step of sequentially delaying X time limit closing of the section switch before the fault point, and after closing the fault point, opening and closing the section switch immediately before the fault point again and locking the section switch in a forward direction further comprises:
and the section switch is provided with post-closing acceleration protection so as to realize that the section switch immediately before the fault point is opened again and locked in the positive direction.
6. The method for on-site feeder automation fault handling with fusion acceleration protection according to claim 5, wherein the post-closing acceleration protection comprises phase over-current acceleration, zero-sequence over-current acceleration, and zero-sequence voltage acceleration.
7. The method for local feeder automation fault handling with fusion of accelerated protection according to claim 6, wherein the step of sequentially delaying X time limit switch-on of the section switch before the fault point, and switching off and forward locking the section switch immediately before the fault point after the switch-on to the fault point further comprises:
after the section switch is switched on to the fault point, the section switch close to the fault point is subjected to accelerated protection switching-off within a second time length, and the switching-off time length of the section switch close to the fault point is less than Y time limit, so that forward locking is realized.
8. The method for in-place feeder automation fault handling with converged acceleration protection according to claim 7, wherein the step of detecting a short-term incoming call back-latch again by the sectionalizer immediately after the fault point further comprises:
and the duration of the short-time incoming call is less than the X time limit so as to realize reverse locking.
9. The fused accelerated protection in-place feeder automation fault handling method of claim 8, wherein the step of the sectionalizer immediately after the fault point detecting the short incoming call again and locking back further comprises:
and after the voltage of the single side of the interconnection switch of the power supply line is lost, the switch is switched on after the third time is reached.
10. The method for in-place feeder automation fault handling with converged acceleration protection according to claim 9, wherein the step of detecting a short-term incoming call back-latch again by the sectionalizer immediately after the fault point further comprises:
and the section switch behind the section where the fault point is located is sequentially switched on through the X time limit delay so as to recover the power supply of the downstream non-fault section and finish fault processing.
11. The fused accelerated protection in-place feeder automation fault handling method of any one of claims 1-10, wherein the X time limit is 3s.
12. The fused accelerated protection in-place feeder automation fault handling method according to any one of claims 7 to 10, wherein the Y time limit is 2s.
13. The fused accelerated protection in-place feeder automation fault handling method of any one of claims 7 to 10, wherein the second time period is no greater than 100ms.
14. An on-site feeder automation fault processing device integrating accelerated protection is characterized by comprising an outgoing switch action module, a sectional switch opening module, a front-end isolation module and a rear-end isolation module; wherein the content of the first and second substances,
the outgoing switch action module is used for tripping the outgoing switch of the transformer substation in a protection mode when a power supply line fails, and a section switch of the power supply line is not switched off; after the first time period, the outgoing line switch is reclosed;
the section switch opening module is used for enabling the section switch in front of a fault point to be opened without time delay when the fault is a permanent fault, and enabling the section switch behind the fault point to be opened when the section switch detects a short-time incoming call;
the front end isolation module is used for sequentially delaying the time-delay X-time-limit switching-on of the section switch in front of the fault point, switching off the section switch close to the fault point again and locking the section switch in the forward direction after the section switch is switched on to the fault point so as to isolate the front end of the section where the fault point is located and recover the power supply of the upstream non-fault section;
and the rear end isolation module is used for enabling the section switch which is next to the fault point to reversely lock when detecting the short-time incoming call again so as to isolate the rear end of the section where the fault point is located and finish fault processing.
15. A computer device comprising a memory and a processor, the memory storing a computer program, characterized in that the processor realizes the steps of the method of any of claims 1-13 when executing the computer program.
16. A computer-readable storage medium, having stored thereon a computer program; the computer program is executed by a processor to implement the method of any one of claims 1-13.
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN116345420A (en) * | 2023-05-12 | 2023-06-27 | 珠海许继电气有限公司 | Communication transfer processing method and system for distribution line faults |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN116345420A (en) * | 2023-05-12 | 2023-06-27 | 珠海许继电气有限公司 | Communication transfer processing method and system for distribution line faults |
| CN116345420B (en) * | 2023-05-12 | 2023-10-27 | 珠海许继电气有限公司 | Communication transfer processing method and system for distribution line faults |
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