CN111525520B - Accident total or protection method, device, equipment and storage medium - Google Patents
Accident total or protection method, device, equipment and storage medium Download PDFInfo
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- CN111525520B CN111525520B CN202010304300.4A CN202010304300A CN111525520B CN 111525520 B CN111525520 B CN 111525520B CN 202010304300 A CN202010304300 A CN 202010304300A CN 111525520 B CN111525520 B CN 111525520B
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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
- H02H7/22—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 for distribution gear, e.g. bus-bar systems; for switching devices
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02H—EMERGENCY PROTECTIVE CIRCUIT ARRANGEMENTS
- H02H3/00—Emergency protective circuit arrangements for automatic disconnection directly responsive to an undesired change from normal electric working condition with or without subsequent reconnection ; integrated protection
- H02H3/02—Details
- H02H3/04—Details with warning or supervision in addition to disconnection, e.g. for indicating that protective apparatus has functioned
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Abstract
The application discloses a method, a device, equipment and a storage medium for accident summary or protection, wherein the method comprises the following steps: when the dispatching automation system detects that the substation is triggered by an accident master or protection action signal, the state of the switchgear related to the accident master or protection action signal is checked through the topological connection relation; and when the state of the associated switch equipment has a deflection state from closing to opening, judging whether the associated equipment is accident tripping, and if so, giving an accident tripping alarm. The method and the device solve the problem that the accident tripping of the switch equipment or the accident tripping of a plurality of switch equipment related to the protection action signal can be caused by the protection actions of some equipment in the existing relay protection, and at the moment, only the accident tripping of one switch equipment can be displayed by adopting a dispatching automatic accident alarm judging mechanism; the phenomenon of missed judgment accident tripping exists, the scheduling operation of a power grid is influenced, and the technical problem that corresponding remedial measures are taken for accidents after the accidents occur is not facilitated.
Description
Technical Field
The application relates to the technical field of transformer substation safety protection, in particular to an accident summary or protection method, device, equipment and storage medium.
Background
In the operation of an actual transformer substation, information is acquired by sensors such as a voltage transformer and a current transformer through relay protection, and the actual operation condition of equipment is detected. When the operation equipment in the transformer substation abnormally operates, the relay protection detects faults or abnormal conditions occurring in the power system, so that an alarm signal is sent out. Or directly isolating and cutting off the fault part.
The function of the dispatching automation system can be divided into two parts of data acquisition, system monitoring and energy management, real-time data of a power system is acquired by using communication, electronic and computer technologies, the operation of a power grid and a transformer substation is monitored and controlled, and the acquisition function of four remote (remote signaling, remote measuring, remote control and remote regulation) information is realized by using a remote communication technology. And in the dispatching automation system, the abnormal operation of the substation equipment is alarmed by acquiring the four-remote operation information of the substation equipment. In the dispatching automation system, the definition of equipment information mainly comprises bus, transformer, switch, disconnecting link, grounding switch, PT, CT and the like, the dispatching automation system collects four-remote information of substation equipment, defines the information in a dispatching automation system database, defines a graphical interface in the system for realizing visual detection, and correspondingly associates the collected four-remote information with equipment in an electrical primary wiring diagram in the graphical interface in the dispatching automation system to realize visual monitoring of the operation of the power grid.
In the alarm information in the dispatching automation system, the specific judgment mechanism for the accident tripping alarm of the switch equipment in the transformer substation is in a combined form of 'accident total or protection + switch tripping deflection', namely when the dispatching automation system receives the accident total action or the protection signal action of an electrical interval switch from closing to opening, and simultaneously the system receives the accident total action or the protection signal action of the electrical interval, the accident tripping is judged to be the switching of the switch equipment from closing to opening. Dispatch automation systems can currently only associate a "total or protection of accident" action signal within a specific electrical interval to a device in the specific electrical interval, such as: the protection action of some equipment in the actual relay protection can cause the accidental tripping of the switch equipment or the accidental tripping of a plurality of switch equipment related to the protection action signal, and at the moment, only the accidental tripping of one switch equipment can be displayed by adopting a dispatching automatic accident alarm judging mechanism; in actual power grid operation, the judgment mechanism has the phenomenon of missed judgment accident tripping, so that the dispatching operation of the power grid is influenced, the occurrence of accidents is not facilitated, and corresponding remedial measures are taken for the accidents.
Disclosure of Invention
The application provides an accident total or protection method, device, equipment and storage medium, which solve the problem that some equipment protection actions in the existing relay protection can cause the accident tripping of the switch equipment or the accident tripping of a plurality of switch equipment related to the protection action signal, and at the moment, only the accident tripping of one switch equipment can be displayed by adopting a dispatching automatic accident alarm judging mechanism; the phenomenon of missed judgment accident tripping exists, the scheduling operation of a power grid is influenced, and the technical problem that corresponding remedial measures are taken for accidents after the accidents occur is not facilitated.
In a first aspect, the present application provides a method for accident prevention or protection, including:
when the dispatching automation system detects that the substation is triggered by an accident master or protection action signal, the state of a switchgear related to the accident master or protection action signal is checked through a topological connection relation;
and when the state of the associated switch equipment has a deflection state from closing to opening, judging whether the associated equipment is accident tripping, and if so, giving an accident tripping alarm.
Optionally, the topological connection relationship specifically includes:
generating a common node between terminals of the devices connected with each other, and recording the common node and the attribution device to which the device terminal belongs;
and establishing a primary wiring diagram by establishing the connection of the common nodes.
Optionally, when the state of the associated switching device has a deflection state from closing to opening, determining whether the associated switching device is an accidental trip, and if so, making an accidental trip alarm specifically includes:
when the associated switch equipment is detected to have a deflection state from closing to separating, whether the associated switch equipment meets accident total or protection and switch tripping deflection at the same time is judged, if yes, the associated switch equipment is judged to be accident tripping, and an alarm is given.
Optionally, when the state of the associated switching device has a deflection state from closing to opening, determining whether the associated switching device is an accidental trip, and if so, making an accidental trip alarm further includes:
if not, the protection action signal is judged to be abnormal, and an alarm is given.
A second aspect of the present application provides an accident prevention or protection device comprising:
the signal triggering module is used for checking the state of a switch device associated with an accident total or protection action signal through a topological connection relation when the dispatching automation system detects that the accident total or protection action signal of the transformer substation is triggered;
and the alarm module is used for judging whether the associated equipment is in accident tripping or not when the associated switch equipment is in a deflection state from closed to separated, and giving an accident tripping alarm if the associated equipment is in the accident tripping state.
Optionally, the topological connection relationship specifically includes:
generating a common node between terminals of the devices connected with each other, and recording the common node and the attribution device to which the device terminal belongs;
and establishing a primary wiring diagram by establishing the connection of the common nodes.
Optionally, the alarm module is specifically configured to:
when the associated switch equipment is detected to have a deflection state from closing to separating, whether the associated switch equipment meets accident total or protection and switch tripping deflection at the same time is judged, if yes, the associated switch equipment is judged to be accident tripping, and an alarm is given.
Optionally, the alarm module is further configured to:
if not, the protection action signal is judged to be abnormal, and an alarm is given.
A third aspect of the application provides an incident total or protection device comprising a processor and a memory:
the memory is used for storing program codes and transmitting the program codes to the processor;
the processor is configured to perform the crash summary or protection method of the first aspect according to instructions in the program code.
A fourth aspect of the present application provides a computer-readable storage medium for storing program code for performing the incident total or protection method of the first aspect.
According to the technical scheme, the method has the following advantages:
in the present application, an accident summary or protection method is provided, including:
when the dispatching automation system detects that the substation is triggered by an accident master or protection action signal, the state of a switchgear related to the accident master or protection action signal is checked through a topological connection relation;
and when the state of the associated switch equipment has a deflection state from closing to opening, judging whether the associated equipment is accident tripping, and if so, giving an accident tripping alarm.
According to the accident master or protection method, accident tripping of the switch device is achieved through a mode of 'accident master or protection + topological connection relation check', the establishment of the connection relation is achieved through the establishment of the public node between the terminals of the switch device, the situation that the deflection of the switch device associated with 'protection signal action' exists can be judged, compared with the prior art, the situation that the alarm is started when the accident tripping of a plurality of switch devices is caused by one protection signal action can be achieved, and therefore effective and accurate judgment of the scheduling automation system on the accident tripping time of the power grid operation switch is achieved. The method and the device solve the problem that the accident tripping of the switch equipment or the accident tripping of a plurality of switch equipment related to the protection action signal can be caused by the protection actions of some equipment in the existing relay protection, and at the moment, only the accident tripping of one switch equipment can be displayed by adopting a dispatching automatic accident alarm judging mechanism; the phenomenon of missed judgment accident tripping exists, the scheduling operation of a power grid is influenced, and the technical problem that corresponding remedial measures are taken for accidents after the accidents occur is not facilitated.
Drawings
FIG. 1 is a schematic flow chart diagram illustrating one embodiment of an incident total or protection method provided herein;
FIG. 2 is a schematic flow chart diagram illustrating another embodiment of an incident total or protection method provided herein;
fig. 3 is a primary wiring diagram of a 220kV double-bus wiring manner of a substation in an accident total or protection method according to an embodiment of the present application;
fig. 4 is a schematic diagram of a manner of constructing a power grid topology connection relationship of an accident total or protection method according to an embodiment of the present application;
fig. 5 is a schematic structural diagram of an accident prevention or protection device according to an embodiment of the present disclosure.
Detailed Description
In order to make the technical solutions of the present application better understood, the technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the drawings in the embodiments of the present application, and it is obvious that the described embodiments are only a part of the embodiments of the present application, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present application.
The accident is total: each electrical interval has a total accident signal which is OR-synthesized by all protection action signals in the electrical interval, namely: when a protection action signal acts in an electric interval, the accident of the electric interval always acts simultaneously.
Remote signaling (remote signaling information): and remote signals are used for collecting and transmitting various protection and switching value information.
Telemetry (telemetry information): and (4) remotely measuring, collecting and transmitting operation parameters including various electrical quantities (such as voltage, current, power and the like on a line), load flow and the like.
Remote control (remote control information): and the remote control module is used for receiving and executing remote control commands, mainly switching on and switching off, and remotely controlling some remote switch control devices.
Remote tuning (remote tuning information): and remote regulation, receiving and executing a remote regulation command, and remotely debugging remote controlled equipment, such as regulating the output power of a generator.
The embodiment of the application provides an accident total or protection method, device, equipment and storage medium, which solve the problem that some equipment protection actions in the existing relay protection can cause the accident tripping of the switch equipment or the accident tripping of a plurality of switch equipment related to a protection action signal, and at the moment, only the accident tripping of one switch equipment can be displayed by adopting a dispatching automatic accident alarm judging mechanism; the phenomenon of missed judgment accident tripping exists, the scheduling operation of a power grid is influenced, and the technical problem that corresponding remedial measures are taken for accidents after the accidents occur is not facilitated.
Referring to fig. 1, 3 and 4, fig. 1 is a schematic flow chart of an embodiment of an accident prevention or protection method provided by the present application; fig. 3 is a primary wiring diagram of a 220kV double-bus wiring manner of a substation in an accident total or protection method according to an embodiment of the present application; fig. 4 is a schematic diagram of a manner of constructing a power grid topology connection relationship of an accident total or protection method according to an embodiment of the present application.
A first aspect of an embodiment of the present application provides an accident summary or protection method, including:
100, when the dispatching automation system detects that the substation is triggered by an accident total or protection action signal, checking the state of a switchgear related to the accident total or protection action signal through a topological connection relation;
200, when the state of the associated switch equipment has a deflection state from closing to opening, judging whether the associated equipment is accident tripping, and if so, giving an accident tripping alarm.
It should be noted that, in order to determine the accident tripping of the dispatching automation system, the embodiment of the present application determines the state of the switchgear by using a manner based on a topological connection relationship when an accident total or protection signal acts in an interval. When detecting that an accident total or protection action signal starts at a specific interval of a certain transformer substation in the dispatching automation system, the state of the switchgear associated with the accident total or protection action signal is checked through the topological connection relation, and when detecting that the switchgear is switched to a divided deflection state, the switchgear is judged to be an accident trip in the system through a judgment mechanism meeting the conditions of the accident total or protection and the switch trip deflection.
For the tripping of the switchgear caused by the tripping of the bus differential protection in the double-bus connection mode in fig. 3, the protection method provided by the embodiment of the application can effectively determine that the tripping of the switchgear is an accidental tripping, when the dispatching automation system detects that the bus in the double-bus connection mode generates a bus differential protection signal, the system can detect the state of the switchgear associated with the bus differential protection through the topological connection relation, at this time, the switching state of 2201 switch, 2012 switch, 2234 switch and 2235 switch is detected to generate a shifting state from switching on to switching off through the topological connection relation, so that the accidental tripping determination of "total accident or protection + switch tripping shifting" is met, and the switching shifting of 2201 switch, 2012 switch, 2234 switch and 2235 switch can be effectively determined as the accidental tripping in the system.
Further, the topological connection relationship specifically includes:
generating a common node between terminals of the devices connected with each other, and recording the common node and the attribution device to which the device terminal belongs;
and establishing a primary wiring diagram by establishing the contact of the common nodes.
It should be noted that, when the dispatching automation system detects that the bus in the double-bus connection mode generates the bus differential protection signal, the system detects the state of the switchgear associated with the bus differential protection through the topological connection relationship.
Further, when the state of the associated switch device is in a position-changing state from closing to opening, whether the associated device is an accident trip is judged, and if yes, the alarm for the accident trip specifically comprises the following steps:
when the associated switch equipment is detected to have a deflection state from closing to separating, whether the associated switch equipment meets accident total or protection and switch tripping deflection at the same time is judged, if yes, the associated switch equipment is judged to be accident tripping, and an alarm is given.
The bus differential signal may be a bus differential protection signal generated by a double bus connection method.
For ease of understanding, please refer to fig. 2, which is a schematic flow chart of another embodiment of an accident prevention or protection method provided herein;
further, when the state of the associated switch device has a displacement state from closing to opening, whether the associated device is an accident trip is judged, and if so, the alarm of the accident trip further comprises the following steps:
if not, judging that the protection action signal is abnormal and giving an alarm.
It should be noted that, as shown in fig. 3, taking a 220kV double-bus connection mode of a substation as an example, bus differential protection is adopted, a double-bus connection mode is generally adopted in 110kV and 220kV substations, and for bus equipment, relay protection equipment is a relevant protection measure for the bus equipment, such as: in the double-bus operation mode, when the relay protection equipment detects the differential protection of an operating bus 1, the relay protection equipment firstly drives the equipment to trip off a bus-coupled switch (2012 switch), limits the influence range for preventing the bus protection from affecting the equipment on another bus 2, and continuously trips off all switches (2201 switch, 2234 switch and 2235 switch) of a line connected with the bus 1, thereby further reducing the expansion and influence of the accident range. At this time, the tripped 2201 switch, 2012 switch, 2234 switch and 2235 switch is the accident trip caused by the bus differential protection. When the accident tripping determination method of 'accident total or protection + switch tripping deflection' is adopted in the dispatching automation system, the bus differential protection signal is generally associated with the 2201 switch (namely a main transformer high-level switch), and at the moment, when the accident tripping of the 2201 switch, 2012 switch, 2234 switch and 2235 switch caused by the bus differential protection occurs, the dispatching automation system can only determine the 2012 switch accident tripping because the accident tripping of the 2201 switch, 2012 switch, 2234 switch and 2235 switch fails to determine.
At this time, a construction diagram of the topological connection relationship in the dispatching automation system is shown in detail in fig. 4, a graph in the system electrical primary wiring diagram is constructed by an application development framework of a graphical user interface, and each equipment element is constructed by a connection terminal. In fig. 4, the devices in the 220kV line interval include switches, disconnecting links, buses and lines, the devices are connected through connecting lines, at this time, physical connections are established between the devices in the 220kV line interval, and in order to establish a connection relationship between the devices, a connection terminal is defined on the connection terminal side of each device and other devices, as shown in fig. 4, a bus 1 device includes a bus 1 terminal 1; the bus 2 equipment comprises a bus 2 terminal 1; 22341 knife switch equipment comprises 22341 knife switch terminals 1 and 22343 knife switch terminals 2; 22342 knife switch equipment comprises 22342 knife switch terminals 1 and 22342 knife switch terminals 2; 2234 switch device includes 2234 switch terminal 1, 2234 switch terminal 2; 22344 knife switch devices include 22344 knife switch terminals 1 and 22344 knife switch terminals 2, the terminals included in each device include information defined by each device, a common node is generated between the terminals connected with each other, the common node to which the device terminal belongs and which device the terminal belongs to are recorded when the system is stored, and the connection relation of a primary wiring diagram of the dispatching automation system is established by establishing direct connection between the device terminals and the common node between the terminals, so that the power grids are connected as a whole.
For easy understanding, please refer to fig. 5, which is a schematic structural diagram of an accident prevention and protection device provided by the present application.
A second aspect of the present application provides an accident prevention or protection device comprising:
the signal triggering module 10 is configured to, when the dispatching automation system detects that an accident total or protection action signal triggers the substation, check a state of a switchgear associated with the accident total or protection action signal through a topological connection relationship;
and the alarm module 20 is used for judging whether the associated equipment is in accident tripping or not when the associated switch equipment is in a deflection state from closed state to separated state, and giving an accident tripping alarm if the associated equipment is in the accident tripping state.
Further, the topological connection relationship specifically includes:
generating a common node between terminals of the devices connected with each other, and recording the common node and the attribution device to which the device terminal belongs;
and establishing a primary wiring diagram by establishing the contact of the common nodes.
Further, the alarm module 20 is specifically configured to:
when the associated switch equipment is detected to have a deflection state from closing to separating, whether the associated switch equipment meets accident total or protection and switch tripping deflection at the same time is judged, if yes, the associated switch equipment is judged to be accident tripping, and an alarm is given.
Further, the alarm module 20 is further configured to:
if not, the protection action signal is judged to be abnormal, and an alarm is given.
A third aspect of the application provides an incident total or protection device comprising a processor and a memory:
the memory is used for storing the program codes and transmitting the program codes to the processor;
the processor is configured to execute the crash summary or protection method provided by the above-described embodiments according to instructions in the program code.
A fourth aspect of the present application provides a computer-readable storage medium for storing program code for performing the accident summary or protection method provided by the above-described embodiments.
The terms "comprises," "comprising," and any other variation thereof in the description and the drawings described above are intended to cover a non-exclusive inclusion, such that a process, method, system, article, or apparatus that comprises a list of steps or elements is not necessarily limited to those steps or elements expressly listed, but may include other steps or elements not expressly listed or inherent to such process, method, article, or apparatus.
It should be understood that in the present application, "at least one" means one or more, "a plurality" means two or more. "and/or" for describing an association relationship of associated objects, indicating that there may be three relationships, e.g., "a and/or B" may indicate: only A, only B and both A and B are present, wherein A and B may be singular or plural. The character "/" generally indicates that the former and latter associated objects are in an "or" relationship. "at least one of the following" or similar expressions refer to any combination of these items, including any combination of single item(s) or plural items. For example, at least one (one) of a, b, or c, may represent: a, b, c, "a and b", "a and c", "b and c", or "a and b and c", wherein a, b, c may be single or plural.
In the several embodiments provided in the present application, it should be understood that the disclosed system, apparatus and method may be implemented in other manners. For example, the above-described apparatus embodiments are merely illustrative, and for example, the division of the units is only one logical division, and other divisions may be realized in practice, for example, a plurality of units or components may be combined or integrated into another system, or some features may be omitted, or not executed. In addition, the shown or discussed mutual coupling or direct coupling or communication connection may be an indirect coupling or communication connection through some interfaces, devices or units, and may be in an electrical, mechanical or other form.
The units described as separate parts may or may not be physically separate, and parts displayed as units may or may not be physical units, may be located in one place, or may be distributed on a plurality of network units. Some or all of the units can be selected according to actual needs to achieve the purpose of the solution of the embodiment.
In addition, functional units in the embodiments of the present application may be integrated into one processing unit, or each unit may exist alone physically, or two or more units are integrated into one unit. The integrated unit can be realized in a form of hardware, and can also be realized in a form of a software functional unit.
The integrated unit, if implemented in the form of a software functional unit and sold or used as a stand-alone product, may be stored in a computer readable storage medium. Based on such understanding, the technical solution of the present application may be substantially implemented or contributed to by the prior art, or all or part of the technical solution may be embodied in a software product, which is stored in a storage medium and includes instructions for causing a computer device (which may be a personal computer, a server, or a network device) to execute all or part of the steps of the method according to the embodiments of the present application. And the aforementioned storage medium includes: a U disk, a removable hard disk, a Read-Only Memory (ROM), a Random Access Memory (RAM), a magnetic disk or an optical disk, and other various media capable of storing program codes.
The above embodiments are only used for illustrating the technical solutions of the present application, and not for limiting the same; although the present application has been described in detail with reference to the foregoing embodiments, it should be understood by those of ordinary skill in the art that: the technical solutions described in the foregoing embodiments may still be modified, or some technical features may be equivalently replaced; and such modifications or substitutions do not depart from the spirit and scope of the corresponding technical solutions in the embodiments of the present application.
Claims (10)
1. A method of accident containment or protection, comprising:
when the dispatching automation system detects that the substation is triggered by an accident master or protection action signal, the state of a switchgear related to the accident master or protection action signal is checked through a topological connection relation;
and when the state of the associated switch equipment has a deflection state from closing to opening, judging whether the associated equipment is accident tripping, and if so, giving an accident tripping alarm.
2. The accident summary or protection method according to claim 1, wherein the topological connection relationship specifically includes:
generating a common node between terminals of the devices connected with each other, and recording the common node and the attribution device to which the device terminal belongs;
and establishing a primary wiring diagram by establishing the connection of the common nodes.
3. The accident total or protection method according to claim 1, wherein when the associated switching device has a shift state from close to open, determining whether the associated switching device is an accident trip, and if so, making an accident trip alarm specifically includes:
when the associated switch equipment is detected to have a deflection state from closing to separating, whether the associated switch equipment meets accident total or protection and switch tripping deflection at the same time is judged, if yes, the associated switch equipment is judged to be accident tripping, and an alarm is given.
4. The accident total or protection method according to claim 1, wherein the determining whether the associated equipment is an accident trip when the associated switchgear state has a shift state from close to open, and if so, making an accident trip alarm further comprises:
if not, the protection action signal is judged to be abnormal, and an alarm is given.
5. An accident prevention or protection device, comprising:
the signal triggering module is used for checking the state of a switch device associated with an accident total or protection action signal through a topological connection relation when the dispatching automation system detects that the accident total or protection action signal of the transformer substation is triggered;
and the alarm module is used for judging whether the associated equipment is in accident tripping or not when the associated switch equipment is in a deflection state from closed to separated, and giving an accident tripping alarm if the associated equipment is in the accident tripping state.
6. The crash summary or protection device according to claim 5, wherein the topological connection relationship specifically comprises:
generating a common node between terminals of the devices connected with each other, and recording the common node and the attribution device to which the device terminal belongs;
and establishing a primary wiring diagram by establishing the connection of the common nodes.
7. The accident summary or protection device of claim 5, wherein the alarm module is specifically configured to:
when the associated switch equipment is detected to have a deflection state from closing to separating, whether the associated switch equipment meets accident total or protection and switch tripping deflection at the same time is judged, if yes, the associated switch equipment is judged to be accident tripping, and an alarm is given.
8. The crash summary or protection device of claim 5, wherein the alarm module is further configured to:
if not, the protection action signal is judged to be abnormal, and an alarm is given.
9. An incident total or protection device, the device comprising a processor and a memory:
the memory is used for storing program codes and transmitting the program codes to the processor;
the processor is configured to perform the crash summary or protection method of any of claims 1-4 in accordance with instructions in the program code.
10. A computer-readable storage medium, characterized in that the computer-readable storage medium is configured to store a program code for performing the accident totalization or protection method of any of claims 1-4.
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