CN113219292B - Bus accident diagnosis method, device, equipment and storage medium - Google Patents
Bus accident diagnosis method, device, equipment and storage medium Download PDFInfo
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- CN113219292B CN113219292B CN202110770013.7A CN202110770013A CN113219292B CN 113219292 B CN113219292 B CN 113219292B CN 202110770013 A CN202110770013 A CN 202110770013A CN 113219292 B CN113219292 B CN 113219292B
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Abstract
The invention discloses a bus accident diagnosis method, a bus accident diagnosis device, bus accident diagnosis equipment and a storage medium. The method comprises the following steps: acquiring at least one electrically-spaced accident signal connected to a bus; determining the bus voltage state and a target electrical interval corresponding to the bus voltage state according to the accident signal, wherein the bus voltage state comprises: a no-voltage state and a no-voltage state; and determining a switch state corresponding to the target electrical interval, and determining the fault type of the accident signal according to the switch state and the bus voltage state. By the technical scheme, the bus accident type can be quickly diagnosed, manual operation is saved, and the bus accident recovery speed and the bus power supply reliability are improved.
Description
Technical Field
The embodiment of the invention relates to the technical field of fault diagnosis, in particular to a bus accident diagnosis method, device, equipment and storage medium.
Background
Most transformer substations in the era of microcomputer relay protection are unattended transformer substations, when a 10kV line fault and a 10kV bus voltage loss fault occur, operators need to be arranged to go to the substation to check the fault immediately, and the operators are matched with a dispatching terminal to acquire various protection actions and switch displacement time sequence information to diagnose the fault source, so that the fault line is isolated independently, and the running state of the 10kV bus is recovered as soon as possible.
At present, various types of information are mainly acquired manually for diagnosing fault points, and possible fault points are checked one by one according to the experience of professional technicians to determine actual fault points, so that the operation is complex, time and labor are wasted, the speed of repairing bus accidents is low, and the reliability of bus power supply is low.
Disclosure of Invention
The embodiment of the invention provides a bus accident diagnosis method, a bus accident diagnosis device, bus accident diagnosis equipment and a storage medium, so that the bus accident type can be quickly diagnosed, manual operation is saved, and the bus accident recovery speed and the bus power supply reliability are improved.
In a first aspect, an embodiment of the present invention provides a bus accident diagnosis method, including:
acquiring at least one electrically-spaced accident signal connected to a bus;
determining the bus voltage state and a target electrical interval corresponding to the bus voltage state according to the accident signal, wherein the bus voltage state comprises: a no-voltage state and a no-voltage state;
and determining a switch state corresponding to the target electrical interval, and determining the fault type of the accident signal according to the switch state and the bus voltage state.
Further, the accident signal includes: and correspondingly, determining a target electrical interval corresponding to the bus voltage state according to the accident signal by using a protection action mark, wherein the protection action mark comprises the following steps:
if the bus voltage state is a voltage loss state and the action of a target protection device is determined according to the protection action mark, determining all electrical intervals connected to the bus as target electrical intervals;
if the bus voltage state is a no-voltage-loss state, determining that an electrical interval corresponding to the accident signal is a target electrical interval;
wherein the object protection device comprises: any one of a grounding transformer protection device, a main transformer backup protection device and a section protection device.
Further, the method further comprises:
and if the voltage state of the bus is a voltage loss state and the target protection device does not act according to the protection action mark, determining that the fault type of the accident signal is a power supply fault corresponding to the bus.
Further, the accident signal includes: the determining, according to the switching state and the bus voltage state, the fault type of the accident signal according to the protection action time corresponding to the interval protection device of the target electrical interval and the switching tap time corresponding to each protection action, includes:
if the switch state is the on-position state and the bus voltage state is the voltage loss state, determining that the fault type of the accident signal is the bus voltage loss caused by the failure of the target electrical compartment switch;
and if the switching state is a position division state, determining the fault type of the accident signal according to the bus voltage state, the protection action time and the switching position division time corresponding to each protection action.
Further, determining the fault type of the accident signal according to the bus voltage state, the protection action time and the switch tap time corresponding to each protection action, includes:
determining the difference value between the switch off time and the protection action time as protection off time corresponding to a target electrical interval;
if the bus voltage state is a voltage loss state, the protection switching-off time is less than or equal to a first preset time, and a protection action reset mark corresponding to the interval protection device is not obtained within a second preset time, determining that the fault type of the accident signal is bus voltage loss caused by that a fault is not isolated after a target electrical interval switch is switched off, wherein the second preset time is greater than the first preset time;
if the bus voltage state is a voltage loss state, the protection switching-off time is longer than first preset time, the bus voltage state is a voltage loss state, and the switch position division time is longer than first reference time, determining that the fault type of the accident signal is that the bus voltage loss is caused by slow switch division of a target electrical interval; wherein the first reference time is a time when a target protection device operates in the target electrical interval.
Further, the method further comprises:
if the bus voltage state is a voltage loss state, the protection switching-off time is longer than a first preset time, and the switch position-separating time is shorter than or equal to the first reference time, then a switch slow-separation alarm prompt is carried out;
if the bus voltage state is a no-voltage-loss state, the protection switching-off time is longer than a first preset time, and the switch position-separating time is longer than a second reference time, then a switch slow-separation alarm prompt is carried out;
the second reference time is a set threshold value.
Further, before determining the fault type of the accident signal according to the switch state and the bus voltage state, the method further comprises the following steps:
if the interval protection device is not reclosed, determining the first action time of the interval protection device as first protection action time;
and if the interval protection device is reclosed, determining the first action time of the interval protection device as second protection action time, and determining the last action time of the interval protection device as third protection action time.
In a second aspect, an embodiment of the present invention further provides a bus accident diagnosis apparatus, including:
the acquisition module is used for acquiring at least one electric interval accident signal connected to the bus;
an interval determining module, configured to determine the bus voltage state and a target electrical interval corresponding to the bus voltage state according to the accident signal, where the bus voltage state includes: a no-voltage-loss state fault type;
and the determining module is used for determining the switch state corresponding to the target electrical interval and determining the fault type of the accident signal according to the switch state and the bus voltage state.
In a third aspect, an embodiment of the present invention further provides a computer device, including a memory, a processor, and a computer program stored on the memory and executable on the processor, where the processor executes the computer program to implement the bus accident diagnosis method according to any one of the embodiments of the present invention.
In a fourth aspect, the embodiments of the present invention further provide a computer-readable storage medium, on which a computer program is stored, and the computer program, when executed by a processor, implements the bus accident diagnosis method according to any one of the embodiments of the present invention.
The embodiment of the invention obtains at least one electric interval accident signal connected with a bus; determining the bus voltage state and a target electrical interval corresponding to the bus voltage state according to the accident signal, wherein the bus voltage state comprises: a no-voltage state and a no-voltage state; the method comprises the steps of determining the switch state corresponding to the target electrical interval, determining the fault type of the accident signal according to the switch state and the bus voltage state, solving the problems of complex operation, time and labor waste caused by the fact that various information is collected manually and possible fault points are checked one by one depending on the experience of professional technicians, realizing rapid diagnosis of the bus accident type, saving manual operation, and further improving the bus accident recovery speed and the bus power supply reliability.
Drawings
In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings needed to be used in the embodiments will be briefly described below, it should be understood that the following drawings only illustrate some embodiments of the present invention and therefore should not be considered as limiting the scope, and for those skilled in the art, other related drawings can be obtained according to the drawings without inventive efforts.
FIG. 1 is a flow chart of a bus accident diagnosis method according to a first embodiment of the present invention;
FIG. 2 is a flow chart of a bus accident diagnosis method according to a second embodiment of the present invention;
FIG. 3 is a flow chart of a bus accident diagnosis method according to a third embodiment of the present invention;
FIG. 4 is a flow chart of a marker-based bus incident diagnostic method in an embodiment of the present invention;
fig. 5 is a schematic structural diagram of a bus accident diagnosis device according to a fourth embodiment of the present invention;
fig. 6 is a schematic structural diagram of a computer device in the fifth embodiment of the present invention.
Detailed Description
The present invention will be described in further detail with reference to the accompanying drawings and examples. It is to be understood that the specific embodiments described herein are merely illustrative of the invention and are not limiting of the invention. It should be further noted that, for the convenience of description, only some of the structures related to the present invention are shown in the drawings, not all of the structures.
It should be noted that: like reference numbers and letters refer to like items in the following figures, and thus, once an item is defined in one figure, it need not be further defined and explained in subsequent figures. Meanwhile, in the description of the present invention, the terms "first", "second", and the like are used only for distinguishing the description, and are not to be construed as indicating or implying relative importance.
Example one
Fig. 1 is a flowchart of a bus accident diagnosis method according to an embodiment of the present invention, where the present embodiment is applicable to a case of diagnosing a fault source and a type of a bus accident, the method may be executed by a computer device according to an embodiment of the present invention, and the apparatus may be implemented in a software and/or hardware manner. In an electric power system, a bus refers to the connection of voltage distribution devices at various levels in a substation and the connection of electrical equipment such as a transformer and the like and the corresponding distribution devices, and the bus has the function of collecting, distributing and transmitting electric energy. The electrical interval in the substation refers to a complete electrical circuit, and may include a protection device, a disconnecting switch, a transformer, a lightning arrester, and the like.
As shown in fig. 1, the method specifically includes the following steps:
and S110, acquiring at least one electric interval accident signal connected to the bus.
In this embodiment, the electrical compartment may be a compartment formed by the bus bar and the connection device; the accident signal of the electrical compartment may be a signal generated when a bus bar in the electrical compartment fails and/or a connection device of the bus bar in the electrical compartment fails. Each electrical bay comprising at least one protection device and at least one switch, the accident signal of the electrical bay may comprise: at least one of bus three-phase voltage, bus voltage loss mark, protection action mark, first protection action time, switch potential separation mark and switch potential separation time. The bus in the embodiment of the invention is a 10KV bus at a low voltage side, and the bus is hereinafter referred to as the bus for short.
The action may be an action of starting protection of a line corresponding to the electrical interval or starting protection of a corresponding protection device when the electrical interval is failed. The protection action flag may be used to flag the action state of the protection device, for example, the protection action flag may be 1 to indicate the action of the protection device, and the protection action flag may be 0 to indicate the non-action of the protection device. The first protection action time may be a time of an electrically-spaced interval protection device action.
The switch quantile may refer to a behavior that a switch in an electrical interval trips when the electrical interval fails, so that a switch quantile mark may be used to mark a quantile state of the switch, and the switch quantile time may be a time when the switch quantile. For example, the switch separation bit is marked as 1 to indicate the switch is opened, and the protection action is marked as 0 to indicate the switch is closed.
The bus voltage loss mark can be used for marking a bus voltage loss state, for example, the bus voltage loss mark is 1 to indicate bus voltage loss, and the bus voltage loss mark is 0 to indicate no bus voltage loss.
Specifically, when an accident occurs, the substation sends an interval protection device action signal within a preset time before and after the accident signal corresponding to each electrical interval to the computer equipment, so that the computer equipment can diagnose the fault occurrence point and the fault reason of the accident according to the interval protection device action signal. For example, the interval protection device operation signal may be acquired within 5S before and after the accident signal time of each electrical interval.
S120, determining the bus voltage state and a target electrical interval corresponding to the bus voltage state according to the accident signal, wherein the bus voltage state comprises: a no-voltage condition and a no-voltage condition.
The bus voltage loss refers to a phenomenon that a bus voltage is zero or close to zero due to a fault in a power system. It is understood that the bus no-voltage-loss state may include: the state that the bus voltage is within the preset fluctuation range of the rated voltage when the power system normally operates can also include the state that the power system has an accident, but the bus voltage is still within the preset fluctuation range of the rated voltage.
Specifically, the bus voltage state may be determined according to the bus three-phase voltage included in the accident signal, or may be determined according to a bus voltage loss flag included in the accident signal.
The mode of the target electrical interval corresponding to the bus voltage state can be as follows: if the bus is in a no-voltage-loss state, only the fact that whether the switch position corresponding to the electrical interval corresponding to the accident signal is abnormal needs to be diagnosed, so that the target electrical interval is the electrical interval corresponding to the accident signal; if the bus bar is in a voltage loss state, it is necessary to diagnose whether or not the protection devices in all the electrical compartments connected to the bus bar are abnormal, and therefore, the target electrical compartment is all the electrical compartments connected to the bus bar.
And S130, determining a switch state corresponding to the target electrical interval, and determining the fault type of the accident signal according to the switch state and the bus voltage state.
The fault type of the accident signal may include a fault point and a fault reason causing the accident. The switch states may include switch normal divide, switch reject, and switch slow divide. The slow switch division means that the switch is divided into bits but the bit division time is abnormal.
Specifically, the state of the target electrical compartment switch is determined according to a switch position division mark and switch position division time contained in the accident signal, and the fault type of the accident signal is determined according to the switch state of the bus in a voltage loss state or the switch state of the bus in a voltage loss-free state.
According to the technical scheme of the embodiment, at least one electric interval accident signal connected to the bus is acquired; determining a bus voltage state and a target electrical interval corresponding to the bus voltage state according to the accident signal; the state of a switch corresponding to the target electrical interval is determined, the fault type of the accident signal is determined according to the switch state and the bus voltage state, the bus accident type can be diagnosed quickly, manual operation is saved, and the bus accident recovery speed and the bus power supply reliability are improved.
Example two
Fig. 2 is a flowchart of a bus accident diagnosis method in a second embodiment of the present invention, which is optimized based on the second embodiment, in this embodiment, the accident signal includes: correspondingly, determining a target electrical interval corresponding to the bus voltage state according to the accident signal, wherein the bus voltage state and the protection action mark comprise: if the bus voltage state is a voltage loss state and the action of a target protection device is determined according to the protection action mark, determining all electrical intervals connected to the bus as target electrical intervals; and if the bus voltage state is a no-voltage-loss state, determining that the electrical interval corresponding to the accident signal is a target electrical interval.
As shown in fig. 2, the method of this embodiment specifically includes the following steps:
s210, acquiring an accident signal of at least one electrical interval connected to a bus, wherein the accident signal comprises: bus voltage status and protection action flags.
S220, determining the bus voltage state according to the accident signal, wherein the bus voltage state comprises the following steps: a no-voltage condition and a no-voltage condition.
Optionally, the accident signal of the electrical interval includes: and correspondingly, determining the bus voltage state according to the accident signal, wherein the bus three-phase voltage comprises the following steps:
judging whether the three-phase voltage of the bus is smaller than a preset voltage or not;
if so, determining that the bus voltage state is a voltage loss state;
if not, determining that the bus voltage state is a no-voltage-loss state.
The preset voltage may be set according to actual requirements, for example, the preset voltage may be 0.3 times of a rated voltage.
The bus voltage loss flag may be set to 1 when the bus is in the voltage loss state, and may be set to 0 when the bus is in the voltage loss free state.
And S230, if the voltage state of the bus is a voltage loss state and the target protection device is determined to act according to the protection action mark, determining all the electrical intervals connected to the bus to be target electrical intervals.
The protection device is a device used for isolating faults in the electrical intervals when an accident occurs, each electrical interval comprises at least one protection device, the protection device can be a target protection device and can be other protection devices, and when the bus has the accident, if any target protection device acts, the fault can be removed; when any electric interval has a fault, if any target protection device or the protection device corresponding to the interval acts, the fault can be removed. The object protection device may include: a grounding transformer protection device, a main transformer backup protection device or a subsection protection device.
Specifically, if the bus voltage state is a voltage loss state, whether the target protection device operates is judged according to a protection operation mark corresponding to the target protection device included in the accident signal, if the target protection device operates, all the electrical intervals connected to the bus are set as target electrical intervals, switches in the target electrical intervals are further diagnosed, and the fault type causing the bus accident is determined.
Optionally, if the bus voltage state is a voltage loss state and it is determined that the target protection device does not operate according to the protection operation mark, it is determined that the fault type of the accident signal is a power failure corresponding to the bus.
Specifically, if the bus voltage state is a voltage loss state, it is determined that none of the target protection devices is operated according to the fact that the protection operation flags corresponding to the target protection devices are all 0, and the fault type of the fault signal is a power failure corresponding to the bus, that is, the cause of the bus fault is the power failure corresponding to the bus.
It should be noted that the bus in this embodiment refers to a 10KV bus on the low-voltage side, and the power source corresponding to the bus may be a 35KV bus fault on the high-voltage side, or a transformer fault for supplying electric energy to the bus.
And S240, if the bus voltage state is a no-voltage-loss state, determining that the electric interval corresponding to the accident signal is a target electric interval.
If the bus voltage state is a no-voltage-loss state, each electrical interval on the bus does not need to be diagnosed, only the electrical interval corresponding to the accident signal needs to be determined as a target electrical interval, and further, a switch in the target electrical interval is diagnosed to determine the fault type causing the bus accident.
And S250, determining a switch state corresponding to the target electrical interval, and determining the fault type of the accident signal according to the switch state and the bus voltage state.
According to the technical scheme of the embodiment, at least one electric interval accident signal connected to the bus is acquired; determining the bus voltage state according to the accident signal; if the bus voltage state is a voltage loss state and the action of a target protection device is determined according to the protection action mark, determining all electrical intervals connected to the bus as target electrical intervals; if the bus voltage state is a no-voltage-loss state, determining that the electrical interval corresponding to the accident signal is a target electrical interval, determining a switch state corresponding to the target electrical interval, determining the fault type of the accident signal according to the switch state and the bus voltage state, determining different electrical intervals according to the bus voltage-loss state, and diagnosing switches included in the electrical intervals, so that the fault type of the bus accident can be diagnosed quickly, manual operation is saved, and the speed of bus accident recovery and the bus power supply reliability are improved.
EXAMPLE III
Fig. 3 is a flowchart of a bus fault diagnosis method in a third embodiment of the present invention, which is optimized based on the above embodiment, in this embodiment, the fault signal includes: correspondingly, determining the fault type of the accident signal according to the switch state and the bus voltage state includes: if the switch state is the on-position state and the bus voltage state is the voltage loss state, determining that the fault type of the accident signal is the bus voltage loss caused by the failure of the target electrical compartment switch; and if the switching state is a position division state, determining the fault type of the accident signal according to the bus voltage state, the protection action time and the switching position division time corresponding to each protection action.
As shown in fig. 3, the method of this embodiment specifically includes the following steps:
s310, acquiring an accident signal of at least one electrical interval connected to a bus, wherein the accident signal comprises: the protection action time corresponding to the interval protection device of the target electrical interval and the switch position dividing time corresponding to each protection action.
Wherein each electrical compartment on the bus is provided with a compartment guard and a switch. The first protection operation time is a time when the interval protection device of the target electrical interval operates. And after the interval protection device acts, the switch can carry out position division action within a certain time, and the position division time of the switch is the position division time of the switch in the target electrical interval corresponding to the interval protection device in the target electrical interval after each action. In an accident, the interval protection device may have multiple actions, and accordingly, multiple switch split times.
And S320, determining the bus voltage state and a target electrical interval corresponding to the bus voltage state according to the accident signal.
And S330, determining the switch state corresponding to the target electrical interval.
And S340, if the switch state is the on-position state and the bus voltage state is the voltage loss state, determining that the fault type of the accident signal is the bus voltage loss caused by the failure of the target electrical compartment switch.
Specifically, when an accident occurs in the power system, the principle of removing the fault and recovering the power supply is as follows: after the target protection device acts to protect the circuit, the electrically-spaced switch that failed also needs to be tripped to isolate the fault. If the voltage state of the bus is a voltage-loss state and the switch state corresponding to the target electrical interval is an on-position state, the switch of the target electrical interval is not in an off position, namely the switch fails to operate, and therefore the fault type of the accident signal can be determined to be the bus voltage-loss caused by the failure of the target electrical interval switch.
And S350, if the switch state is a sub-position state, determining the fault type of the accident signal according to the bus voltage state, the first protection action time and the switch sub-position time.
The first protection operation time is a time when the interval protection device of the target electrical interval operates. The switch position division time refers to the time of the switch disconnection after the protection device of the target electrical interval acts.
Specifically, if the switching state corresponding to the target electrical interval is a stepping state, it indicates that the switch is stepping when an accident occurs in the power system, but the time for determining the switching stepping can ensure that the target electrical interval is isolated, so as to achieve fault removal, and therefore, the fault type of the accident signal needs to be determined according to the bus voltage state, the first protection action time, and the switching stepping time.
Optionally, before determining the fault type of the accident signal according to the switch state and the bus voltage state, the method further includes:
if the interval protection device is not reclosed, determining the first action time of the interval protection device as first protection action time;
and if the interval protection device is reclosed, determining the first action time of the interval protection device as second protection action time, and determining the last action time of the interval protection device as third protection action time.
Specifically, if the line fault is a permanent fault and cannot be eliminated, and the interval protection device of the target electrical interval of the electrical interval is not reclosed, the first action time of the interval protection device of the target electrical interval is determined as the first protection action time corresponding to the target electrical interval. If the line fault is an instantaneous fault or a temporary fault and the fault is eliminated, the interval protection device of the target electrical interval can automatically recover the line corresponding to the target electrical interval through reclosing; if the line fault is not eliminated, the reclosing automatically recovers the line corresponding to the target electrical interval, and the fault is not eliminated, the protection device of the target electrical interval acts again, and the switch tripping state is kept. Therefore, the first action time of the interval protection device of the target electrical interval is determined as the second protection action time corresponding to the target electrical interval, and the last action time is determined as the third protection action time corresponding to the target electrical interval.
According to the technical scheme of the embodiment, at least one electric interval accident signal connected to the bus is acquired; determining the bus voltage state and a target electrical interval corresponding to the bus voltage state according to the accident signal; determining a switch state corresponding to the target electrical interval; if the switch state is the on-position state and the bus voltage state is the voltage loss state, determining that the fault type of the accident signal is the bus voltage loss caused by the failure of the target electrical compartment switch; if the switch state is the open position state, determining the fault type of the accident signal according to the bus voltage state, the first protection action time and the switch open position time, determining different electrical intervals according to the bus voltage loss state, quickly diagnosing the fault type of the bus accident according to the corresponding switch open position state and/or protection open time in the electrical intervals, saving manual operation, and further improving the speed of bus accident recovery and the bus power supply reliability.
Optionally, determining the fault type of the accident signal according to the bus voltage state, the first protection action time and the switch tap time includes:
determining the difference value between the switch off time and the first protection action time as protection off time corresponding to a target electrical interval;
if the bus voltage state is a voltage loss state, the protection switching-off time is less than or equal to a first preset time, and a protection action reset mark corresponding to the interval protection device is not obtained within a second preset time, determining that the fault type of the accident signal is bus voltage loss caused by that the fault is not isolated after the target electrical interval switch is switched off, wherein the second preset time is greater than the first preset time;
and if the protection switching-off time is longer than first preset time, the voltage state of the bus is a voltage loss state, and the switch position separation time is longer than first reference time, determining that the fault type of the accident signal is that the bus voltage loss is caused by slow switch separation of the switch of the target electrical interval.
The first preset time can be set according to actual requirements, and can also be determined according to the circuit structure of the electrical interval.
First reference time TstThe time of the target protection device action in the target electrical interval. For example, the target protection device may be a grounding transformer protection device, and the first reference time T may bestFor the time T when the grounding transformer protection device actsJDB(ii) a The target protection device is a backup protection device of the main transformer, and the first reference time T isstFor time T when backup protection device of grounding transformer actsZB(ii) a The target protection device is a segmented protection device, the first reference time T isstFor the time T when the segment protection device is actuatedFD。
Specifically, the first protection operation time corresponding to the target electrical interval i is set to TiDThe corresponding switch position division time after the target electrical interval action is TiFIf the protection switching-off time corresponding to the target electrical interval is TiF-TiDAnd the protection switching-off time reflects the time speed of the switch switching-off of the electrical interval. And determining the fault type of the accident signal according to the bus voltage state and the protection switching-off time.
Illustratively, if the bus voltage state is a voltage loss state, the protection switching-off time is less than or equal to a first preset time, which indicates that the switch position separation time is normal, further judging whether a protection action reset mark corresponding to the interval protection device is obtained within a second preset time to determine whether the switch really plays a role in isolating the electrical interval after the switch position separation, and if the protection action reset mark corresponding to the interval protection device is obtained within the second preset time, which indicates that the switch position separation situation is normal, and the protection device resets to realize isolation faults; if the protection action reset mark corresponding to the interval protection device is not obtained within the second preset time, it is indicated that the condition of the switch-off tap position is normal, but the protection device is not reset, so that the fault type of the accident signal is bus voltage loss caused by that the fault is not isolated after the target electrical interval switch is tapped.
If the bus voltage state is a voltage loss state and the protection switching-off time is greater than the first preset time, it is indicated that the switch off-position time is abnormal, and the reason for the abnormal switch off-position time needs to be further determined according to the switch off-position time and the first reference time, so as to determine the fault type corresponding to the accident signal. If the switch splitting time is greater than the first reference time, the switch splitting time is greater than the action time of the target protection device, and therefore the fault type of the accident signal is determined to be that the bus voltage is lost due to slow switch splitting.
Optionally, the method further includes:
if the bus voltage state is a voltage loss state, the protection switching-off time is longer than a first preset time, and the switch position-separating time is shorter than or equal to the first reference time, then a switch slow-separation alarm prompt is carried out;
and if the bus voltage state is a no-voltage-loss state, the protection switching-off time is longer than a first preset time, and the switch position-separating time is longer than a second reference time, and a switch slow-separation alarm prompt is performed.
The second reference time is a set threshold value in the no-voltage-loss state of the bus, and may be set to 250ms, for example.
Specifically, if the bus voltage state is a voltage loss state, the protection switching-off time is longer than first preset time, and the switch position-separating time is shorter than first reference time, the slow switch separation is described, but the bus voltage loss is not caused, so that the warning prompt of the slow switch separation is performed, and the switch is conveniently overhauled and maintained.
And if the voltage state of the bus is in a no-voltage-loss state, and the protection switching-off time is longer than the first preset time, further waiting for analysis according to the switch off-position time and the second reference time. If the switch position dividing time is greater than the second reference time, performing switch slow division alarm prompt; in order to avoid the phenomenon of frequent alarm, if the switch position dividing time is less than or equal to the second reference time, alarm processing is not carried out.
On the basis of any one of the above embodiments, in order to simplify the diagnosis process, Flag1 is adopted to mark the voltage loss state of the bus, Flag2 marks the switch fault of the electrical interval, Flag3 marks the dividing state of the electrical interval switch, Flag4 marks the slow dividing state of the switch, and Flag5 marks the protection action reset. Fig. 4 is a flowchart of a bus accident diagnosis method based on a marker according to an embodiment of the present invention, and as shown in fig. 4, the specific steps of the embodiment of the present invention are as follows:
step 1: the method comprises the steps that computer equipment obtains accident signals of an electrical interval connected to a bus, whether three-phase voltage of the bus is smaller than preset voltage or not is judged, if yes, bus no-voltage Flag1=1, and if not, bus no-voltage Flag1= 0.
Step 2: if the bus is in voltage loss, the target electrical interval is all electrical intervals connected on the bus, and if the bus is not in voltage loss, the target electrical interval is the electrical interval corresponding to the accident signal.
And step 3: and sequentially judging whether each target electrical interval has faults or not, and if the target electrical intervals have the faults, determining the fault type of a fault point. The step 3 specifically comprises the following steps:
step 31: if Flag1=1, it is determined whether the target protection device is operating. If the target protection devices do not act, determining that the fault type of the accident signal is a power supply fault corresponding to the bus, namely a transformer fault or a power supply fault on the high-voltage side of the bus; if any target protection device is active, step 32 is executed. When Flag1=0, step 32 is directly executed.
Step 32: determining whether a switch of a target electrical interval is in a split state, if not, determining that Flag2=1 and Flag3=1, and determining that the fault type of the accident signal is that the bus is in voltage loss caused by the refusing of the electrical switch; if yes, Flag3=0 and step 33 is executed.
Step 33: and obtaining protection action time corresponding to an interval protection device of a target electrical interval and switch open time corresponding to each action time, and determining protection open time. Judging whether the protection switching-off time is less than or equal to a first preset time, if so, Flag2=0, Flag4=0, and executing step 34; if not, go to step 35.
Step 34: whether the interval protection device of the target electrical interval has the reset action or not is judged, if yes, the protection action reset Flag5=0, and the interval protection device of the target electrical interval is reset, so that Flag1=1, Flag2=0, Flag3=0, Flag4=0, and Flag5=0 indicate the bus fault. If not, Flag5=1, the bay protection device of the target electrical bay is not reset, and the fault type of the fault signal is determined as the bus voltage loss caused by the non-isolated fault after the target electrical bay switch is positioned according to Flag1=1, Flag2=1, Flag3=0, Flag4=0 and Flag5= 1.
Step 35: and in the state of the voltage loss of the bus, determining the second protection action time corresponding to the target protection device as a first reference time, judging whether the switch position dividing time is less than or equal to the first reference time, if so, determining switch slow division according to Flag2=0 and Flag4=1, and performing switch slow division alarm prompt according to Flag2=0, Flag3=0 and Flag4=1, but not influencing the voltage transmission of the bus. If not, Flag2=1 and Flag4=1, so that Flag1=1, Flag2=1, Flag3=0 and Flag4=1 determine that the fault type of the fault signal is that the switch slow component of the target electrical interval causes the voltage of the bus to be lost. Determining a set threshold as second reference time when the bus is not in a voltage loss state, and judging whether the switch position division time is less than or equal to the second reference time; if yes, the alarm prompt is not carried out, and if no, according to Flag1=0, Flag2=1, Flag3=0, and Flag4=1, the switch slow-speed score is indicated, but the bus voltage loss is not caused, and the switch slow-speed score alarm prompt is carried out.
Example four
Fig. 5 is a schematic structural diagram of a bus accident diagnosis device according to a fourth embodiment of the present invention. The present embodiment can be applied to the case of diagnosing the fault source and type of the bus fault, the apparatus can be implemented in a software and/or hardware manner, and the apparatus can be integrated in a computer device provided in the implementation of the present invention, as shown in fig. 5, the apparatus for bus fault diagnosis specifically includes: an acquisition module 410, an interval determination module 420, and a fault type determination module 430.
The acquiring module 410 is used for acquiring an accident signal of at least one electrical interval connected to a bus;
an interval determining module 420, configured to determine the bus voltage state and a target electrical interval corresponding to the bus voltage state according to the accident signal, where the bus voltage state includes: a no-voltage state and a no-voltage state; and a fault type determining module 430, configured to determine a switch state corresponding to the target electrical interval, and determine a fault type of the accident signal according to the switch state and the bus voltage state.
Optionally, the interval determining module 420 includes:
the first interval determining unit is used for determining all electrical intervals connected to the bus as target electrical intervals if the voltage state of the bus is a voltage loss state and the target protection device is determined to act according to the protection action mark;
the second interval determining unit is used for determining that the electric interval corresponding to the accident signal is a target electric interval if the bus voltage state is a no-voltage-loss state;
wherein the object protection device comprises: any one of a grounding transformer protection device, a main transformer backup protection device and a section protection device.
Optionally, the apparatus further comprises:
and the power failure determining module is used for determining that the failure type of the accident signal is the power failure corresponding to the bus if the voltage state of the bus is the voltage loss state and the target protection device does not act according to the protection action mark.
Optionally, the fault type determining module 430 includes:
the switch failure fault determining unit is used for determining that the fault type of the accident signal is bus voltage loss caused by the failure of the target electrical compartment switch if the switch state is the on-position state and the bus voltage state is the voltage loss state;
and the switch position dividing fault determining unit is used for determining the fault type of the accident signal according to the bus voltage state, the protection action time and the switch position dividing time corresponding to each protection action if the switch state is a position dividing state.
Optionally, the switch position-division fault determining unit is specifically configured to:
determining the difference value between the switch off time and the protection action time as protection off time corresponding to a target electrical interval;
if the bus voltage state is a voltage loss state, the protection switching-off time is less than or equal to a first preset time, and a protection action reset mark corresponding to the interval protection device is not obtained within a second preset time, determining that the fault type of the accident signal is bus voltage loss caused by that a fault is not isolated after a target electrical interval switch is switched off, wherein the second preset time is greater than the first preset time;
if the protection switching-off time is longer than first preset time, the voltage state of the bus is a voltage loss state, and the switch position separation time is longer than first reference time, determining that the fault type of the accident signal is that the bus voltage loss is caused by slow switch separation of a target electrical interval;
wherein the first reference time is a time when a target protection device operates in the target electrical interval.
Optionally, the switch position division fault determining unit is further configured to:
if the bus voltage state is a voltage loss state and the switch position dividing time is less than or equal to the first reference time, or the bus voltage state is a voltage loss-free state and the switch position dividing time is greater than the second reference time, performing alarm prompt;
the second reference time is a set threshold value.
Optionally, the fault type determining module is further configured to:
if the interval protection device is not reclosed, determining the first action time of the interval protection device as first protection action time;
and if the interval protection device is reclosed, determining the first action time of the interval protection device as second protection action time, and determining the last action time of the interval protection device as third protection action time.
The product can execute the method provided by any embodiment of the invention, and has corresponding functional modules and beneficial effects of the execution method.
EXAMPLE five
Fig. 6 is a schematic structural diagram of a computer device in the fifth embodiment of the present invention. FIG. 6 illustrates a block diagram of an exemplary computer device 12 suitable for use in implementing embodiments of the present invention. The computer device 12 shown in FIG. 6 is only an example and should not bring any limitations to the functionality or scope of use of embodiments of the present invention.
As shown in FIG. 6, computer device 12 is in the form of a general purpose computing device. The components of computer device 12 may include, but are not limited to: one or more processors or processors 16, a memory 28, and a bus 18 that connects the various system components (including the memory 28 and the processors 16).
The memory 28 may include computer system readable media in the form of volatile memory, such as Random Access Memory (RAM) 30 and/or cache memory 32. Computer device 12 may further include other removable/non-removable, volatile/nonvolatile computer system storage media. By way of example only, storage system 34 may be used to read from and write to non-removable, nonvolatile magnetic media (not shown in FIG. 6, and commonly referred to as a "hard drive"). Although not shown in FIG. 6, a magnetic disk drive for reading from and writing to a removable, nonvolatile magnetic disk (e.g., a "floppy disk") and an optical disk drive for reading from or writing to a removable, nonvolatile optical disk (e.g., a CD-ROM, DVD-ROM, or other optical media) may be provided. In these cases, each drive may be connected to bus 18 by one or more data media interfaces. Memory 28 may include at least one program product having a set (e.g., at least one) of program modules that are configured to carry out the functions of embodiments of the invention.
A program/utility 40 having a set (at least one) of program modules 42 may be stored, for example, in memory 28, such program modules 42 including, but not limited to, an operating system, one or more application programs, other program modules, and program data, each of which examples or some combination thereof may comprise an implementation of a network environment. Program modules 42 generally carry out the functions and/or methodologies of the described embodiments of the invention.
The processor 16 executes various functional applications and data processing by executing programs stored in the memory 28, for example, implementing the bus accident diagnosis method provided by the embodiment of the present invention: acquiring at least one electrically-spaced accident signal connected to a bus; determining the bus voltage state and a target electrical interval corresponding to the bus voltage state according to the accident signal, wherein the bus voltage state comprises: a no-voltage state and a no-voltage state; and determining a switch state corresponding to the target electrical interval, and determining the fault type of the accident signal according to the switch state and the bus voltage state.
EXAMPLE six
Sixth embodiment of the present invention provides a computer-readable storage medium, on which a computer program is stored, where the computer program, when executed by a processor, implements the bus accident diagnosis method provided in all the embodiments of the present invention: acquiring at least one electrically-spaced accident signal connected to a bus; determining the bus voltage state and a target electrical interval corresponding to the bus voltage state according to the accident signal, wherein the bus voltage state comprises: a no-voltage state and a no-voltage state; and determining a switch state corresponding to the target electrical interval, and determining the fault type of the accident signal according to the switch state and the bus voltage state.
Any combination of one or more computer-readable media may be employed. The computer readable medium may be a computer readable signal medium or a computer readable storage medium. A computer readable storage medium may be, for example, but not limited to, an electronic, magnetic, optical, electromagnetic, infrared, or semiconductor system, apparatus, or device, or any combination of the foregoing. More specific examples (a non-exhaustive list) of the computer readable storage medium would include the following: an electrical connection having one or more wires, a portable computer diskette, a hard disk, a Random Access Memory (RAM), a read-only memory (ROM), an erasable programmable read-only memory (EPROM or flash memory), an optical fiber, a portable compact disc read-only memory (CD-ROM), an optical storage device, a magnetic storage device, or any suitable combination of the foregoing. In the context of this document, a computer readable storage medium may be any tangible medium that can contain, or store a program for use by or in connection with an instruction execution system, apparatus, or device.
A computer readable signal medium may include a propagated data signal with computer readable program code embodied therein, for example, in baseband or as part of a carrier wave. Such a propagated data signal may take many forms, including, but not limited to, electro-magnetic, optical, or any suitable combination thereof. A computer readable signal medium may also be any computer readable medium that is not a computer readable storage medium and that can communicate, propagate, or transport a program for use by or in connection with an instruction execution system, apparatus, or device.
Program code embodied on a computer readable medium may be transmitted using any appropriate medium, including but not limited to wireless, wireline, optical fiber cable, RF, etc., or any suitable combination of the foregoing.
Computer program code for carrying out operations for aspects of the present invention may be written in any combination of one or more programming languages, including an object oriented programming language such as Java, Smalltalk, C + + or the like and conventional procedural programming languages, such as the "C" programming language or similar programming languages. The program code may execute entirely on the user's computer, partly on the user's computer, as a stand-alone software package, partly on the user's computer and partly on a remote computer or entirely on the remote computer or server. In the case of a remote computer, the remote computer may be connected to the user's computer through any type of network, including a Local Area Network (LAN) or a Wide Area Network (WAN), or the connection may be made to an external computer (for example, through the Internet using an Internet service provider).
It is to be noted that the foregoing is only illustrative of the preferred embodiments of the present invention and the technical principles employed. It will be understood by those skilled in the art that the present invention is not limited to the particular embodiments described herein, but is capable of various obvious changes, rearrangements and substitutions as will now become apparent to those skilled in the art without departing from the scope of the invention. Therefore, although the present invention has been described in greater detail by the above embodiments, the present invention is not limited to the above embodiments, and may include other equivalent embodiments without departing from the spirit of the present invention, and the scope of the present invention is determined by the scope of the appended claims.
Claims (9)
1. A bus bar fault diagnosis method, comprising:
acquiring at least one electrically-spaced accident signal connected to a bus;
determining the bus voltage state and a target electrical interval corresponding to the bus voltage state according to the accident signal, wherein the bus voltage state comprises: a no-voltage state and a no-voltage state;
determining a switch state corresponding to the target electrical interval, and determining the fault type of the accident signal according to the switch state and the bus voltage state;
the accident signal includes: the determining, according to the switching state and the bus voltage state, the fault type of the accident signal according to the protection action time corresponding to the interval protection device of the target electrical interval and the switching tap time corresponding to each protection action, includes:
if the switch state is the on-position state and the bus voltage state is the voltage loss state, determining that the fault type of the accident signal is the bus voltage loss caused by the failure of the target electrical compartment switch;
and if the switching state is a position division state, determining the fault type of the accident signal according to the bus voltage state, the protection action time and the switching position division time corresponding to each protection action.
2. The method of claim 1, wherein the incident signal comprises: and correspondingly, determining a target electrical interval corresponding to the bus voltage state according to the accident signal by using a protection action mark, wherein the protection action mark comprises the following steps:
if the bus voltage state is a voltage loss state and the action of a target protection device is determined according to the protection action mark, determining all electrical intervals connected to the bus as target electrical intervals;
if the bus voltage state is a no-voltage-loss state, determining that an electrical interval corresponding to the accident signal is a target electrical interval;
wherein the object protection device comprises: any one of a grounding transformer protection device, a main transformer backup protection device and a section protection device.
3. The method of claim 2, further comprising:
and if the voltage state of the bus is a voltage loss state and the target protection device does not act according to the protection action mark, determining that the fault type of the accident signal is a power supply fault corresponding to the bus.
4. The method of claim 1, wherein determining the fault type of the fault signal based on the bus voltage status, the protection action time, and the switch tap time corresponding to each of the protection actions comprises:
determining the difference value between the switch off time and the protection action time as protection off time corresponding to a target electrical interval;
if the bus voltage state is a voltage loss state, the protection switching-off time is less than or equal to a first preset time, and a protection action reset mark corresponding to the interval protection device is not obtained within a second preset time, determining that the fault type of the accident signal is bus voltage loss caused by that a fault is not isolated after a target electrical interval switch is switched off, wherein the second preset time is greater than the first preset time;
if the voltage state of the bus is a voltage loss state, the protection switching-off time is longer than first preset time, and the switch position-separating time is longer than first reference time, determining that the fault type of the accident signal is the bus voltage loss caused by slow switch separation of the target electrical interval;
wherein the first reference time is a time when a target protection device operates in the target electrical interval.
5. The method of claim 4, further comprising:
if the bus voltage state is a voltage loss state, the protection switching-off time is longer than a first preset time, and the switch position-separating time is shorter than or equal to the first reference time, then a switch slow-separation alarm prompt is carried out;
if the bus voltage state is a no-voltage-loss state, the protection switching-off time is longer than a first preset time, and the switch position-separating time is longer than a second reference time, then a switch slow-separation alarm prompt is carried out;
the second reference time is a set threshold value.
6. The method of claim 1, further comprising, prior to determining the fault type of the fault signal based on the switch state and the bus voltage state:
if the interval protection device is not reclosed, determining the first action time of the interval protection device as first protection action time;
and if the interval protection device is reclosed, determining the first action time of the interval protection device as second protection action time, and determining the last action time of the interval protection device as third protection action time.
7. A bus bar accident diagnosis device, comprising:
the acquisition module is used for acquiring at least one electric interval accident signal connected to the bus;
an interval determining module, configured to determine the bus voltage state and a target electrical interval corresponding to the bus voltage state according to the accident signal, where the bus voltage state includes: a no-voltage-loss state fault type;
the determining module is used for determining a switch state corresponding to the target electrical interval and determining the fault type of the accident signal according to the switch state and the bus voltage state;
the accident signal includes: the protection action time corresponding to the interval protection device of the target electrical interval and the switch tap time corresponding to each protection action, correspondingly, the fault type determining module includes:
the switch failure fault determining unit is used for determining that the fault type of the accident signal is bus voltage loss caused by the failure of the target electrical compartment switch if the switch state is the on-position state and the bus voltage state is the voltage loss state;
and the switch position dividing fault determining unit is used for determining the fault type of the accident signal according to the bus voltage state, the protection action time and the switch position dividing time corresponding to each protection action if the switch state is a position dividing state.
8. A computer device comprising a memory, a processor and a computer program stored on the memory and executable on the processor, wherein the processor when executing the program implements a bus bar fault diagnosis method as claimed in any one of claims 1 to 6.
9. A computer-readable storage medium, on which a computer program is stored, characterized in that the program, when being executed by a processor, implements a bus bar fault diagnosis method according to any one of claims 1 to 6.
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| US5715124A (en) * | 1996-04-08 | 1998-02-03 | Sundstrand Corporation | System and method of isolation for detecting a passive protective function failure for an electric power generating system |
| JP4778251B2 (en) * | 2005-03-25 | 2011-09-21 | Ｎｅｃインフロンティア株式会社 | Electronic device inspection method and system using the method |
| CN101820185B (en) * | 2009-02-26 | 2013-07-31 | 西北电网有限公司 | Power grid fault judgment method based on IEC61850 signal semantic logic |
| CN104297637B (en) * | 2014-10-31 | 2015-09-02 | 国家电网公司 | The power system failure diagnostic method of comprehensive utilization electric parameters and time sequence information |
| CN110348690B (en) * | 2019-06-12 | 2021-07-27 | 国网江苏省电力有限公司金湖县供电分公司 | Tree search based result query menu grid accident auxiliary decision making system and method |
| CN111008908A (en) * | 2019-11-13 | 2020-04-14 | 广西电网有限责任公司 | Staged fault diagnosis method |
| CN111934293B (en) * | 2020-08-12 | 2022-08-30 | 广东电网有限责任公司 | Power system fault analysis method, device, equipment and storage medium |
| CN112014695A (en) * | 2020-08-20 | 2020-12-01 | 国网安徽省电力有限公司检修分公司 | GIS equipment fault rapid positioning system and method |
| CN112182816B (en) * | 2020-09-22 | 2023-02-28 | 国网福建省电力有限公司龙岩供电公司 | Method for preventing misoperation in online mode in accident voltage loss region of 35 kV-110 kV power grid |
| CN112415314A (en) * | 2020-11-17 | 2021-02-26 | 华北电力大学（保定） | Hidden fault identification method for relay protection system |
| CN112736866B (en) * | 2020-12-16 | 2023-08-22 | 国网安徽省电力有限公司 | Relay protection self-adaptive real-time evaluation method and system based on wide area information |
| CN112782525A (en) * | 2020-12-25 | 2021-05-11 | 南方电网深圳数字电网研究院有限公司 | Feeder line branch fault studying and judging method and device based on distribution transformer voltage loss alarm |
| CN112952822A (en) * | 2021-03-24 | 2021-06-11 | 国网福建省电力有限公司龙岩供电公司 | Method and equipment for identifying voltage-loss area in multiple dimensions and generating complex electrical path |
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