CN113702758B - Voltage loss detection method and related device for substation bus - Google Patents
Voltage loss detection method and related device for substation bus Download PDFInfo
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- CN113702758B CN113702758B CN202110943311.1A CN202110943311A CN113702758B CN 113702758 B CN113702758 B CN 113702758B CN 202110943311 A CN202110943311 A CN 202110943311A CN 113702758 B CN113702758 B CN 113702758B
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
- G01R31/00—Arrangements for testing electric properties; Arrangements for locating electric faults; Arrangements for electrical testing characterised by what is being tested not provided for elsewhere
- G01R31/08—Locating faults in cables, transmission lines, or networks
- G01R31/081—Locating faults in cables, transmission lines, or networks according to type of conductors
- G01R31/086—Locating faults in cables, transmission lines, or networks according to type of conductors in power transmission or distribution networks, i.e. with interconnected conductors
Abstract
The embodiment of the invention provides a voltage loss detection method and a related device for a bus of a transformer substation, wherein the method comprises the following steps: acquiring a voltage value of a bus and a current value of a low-voltage switch; if the voltage value of the bus is zero and the current value of the low-voltage switch is zero, determining the type of the transformer substation based on the transformer; when the type of the transformer substation is a multi-main transformer substation, the state of the bus-tie switch is identified; if the state of the bus-bar switch is split, determining that the bus is out of voltage; when the type of the transformer substation is a single main transformer substation, the state of the low-voltage switch is identified; if the state of the low-voltage switch is the split state, determining that the bus is out of voltage, and taking the topological state as a basis for judging whether the bus is out of voltage, thereby rapidly isolating the out-of-voltage bus, reducing the operation amount of a dispatcher and a transformer, facilitating rapid power restoration, and simultaneously improving the application range of self-healing of the distribution network.
Description
Technical Field
The embodiment of the invention relates to the technical field of power grid detection, in particular to a voltage loss detection method and a related device for a bus of a transformer substation.
Background
The bus on the bus of the transformer substation is an important component in the power system and is an important device for collecting and distributing electric energy. The bus is usually connected with more electrical elements, and the voltage loss of the bus can cause the elements to be powered off, so that large-area power failure accidents are caused. Therefore, bus voltage loss is one of the most serious faults of electrical equipment of a transformer substation.
In the prior art, after a dispatcher or a transformer operator analyzes according to a plurality of electric quantities and background signals, judging that the bus is out of voltage, and manually switching off all feeder switches connected with a fault bus, so that the time cost for recovering the bus of the transformer substation is increased, and the power supply reliability is reduced; meanwhile, the distribution network self-healing cannot exert the maximum effect, and the distribution network self-healing is realized in situ or the main station self-healing, so that the bus fault voltage loss is not realized.
Disclosure of Invention
The embodiment of the invention provides a voltage loss detection method and a related device for a bus of a transformer substation, which are used for accurately identifying the voltage loss of the bus and rapidly isolating the voltage loss bus, so that the operation amount of a dispatcher and a transformer is reduced, rapid power restoration is facilitated, and the application range of self-healing of a distribution network is improved.
In a first aspect, an embodiment of the present invention provides a method for detecting a voltage loss of a bus of a substation, including:
the method comprises the steps of obtaining a voltage value of a bus and a current value of a low-voltage switch, wherein the bus is connected with a transformer of a transformer substation through the low-voltage switch, and the buses are connected through a bus-bar switch;
if the voltage value of the bus is zero and the current value of the low-voltage switch is zero, determining the type of the transformer substation based on the transformer;
when the type of the transformer substation is a multi-main transformer substation, the state of the bus-tie switch is identified;
if the state of the bus-bar switch is split, determining that the bus is out of voltage;
when the type of the transformer substation is a single main transformer substation, the state of the low-voltage switch is identified;
and if the state of the low-voltage switch is a split state, determining that the bus is out of voltage.
Optionally, determining the type of the substation based on the transformer includes:
counting the number of transformers equipped in the transformer substation;
if the number of the transformers is equal to 1, determining that the type of the transformer substation is a single main transformer substation;
and if the number of the transformers is greater than 1, determining that the type of the transformer substation is a multi-main transformer substation.
Optionally, after identifying the state of the bus-tie switch when the type of the substation is a multi-main transformer substation, the method further comprises:
and if the state of the bus-tie switch is in the closed position, splitting each transformer in the transformer substation so as to adjust the type of the transformer substation from a multi-main-transformer substation to a single-main-transformer substation.
Optionally, after identifying the state of the low switch when the type of the substation is a single main transformer substation, the method further comprises:
if the state of the low-voltage switch is a combination position, determining the type of a winding in the transformer;
and detecting whether the bus is out of voltage based on the type of the winding.
Optionally, the transformer is connected with a variable center bus through a variable center switch, and the transformer is connected with a variable high bus through a variable high switch;
the detecting whether the bus is out of voltage based on the type of the winding includes:
if the type of the winding is two windings, detecting whether the bus is out of voltage or not based on the state of the variable-height switch and the voltage value of the variable-height bus;
and if the winding type is three windings, detecting whether the bus is out of voltage or not based on the state of the variable-height switch, the state of the variable-middle switch, the voltage value of the variable-height bus and the voltage value of the variable-middle bus.
Optionally, the detecting whether the bus is out of voltage based on the state of the high switch and the voltage value of the high bus includes:
if the state of the high-voltage switch is a split state, determining that the bus is out of voltage;
and if the state of the high-voltage changing switch is a combination position and the voltage value of the high-voltage changing bus is zero, determining that the bus is out of voltage.
Optionally, the detecting whether the bus is out of voltage based on the state of the high switch, the state of the medium switch, the voltage value of the high bus, and the voltage value of the medium bus includes:
if the state of the high-changing switch is the split state and the state of the middle-changing switch is the split state, determining that the bus is out of voltage;
if the state of the variable-height switch is a split state, the state of the variable-middle switch is a combined state, and the voltage value of the variable-middle bus is zero, determining that the bus is out of voltage;
if the state of the variable-height switch is the closing position, the state of the variable-middle switch is the dividing position, and the voltage value of the variable-height bus is zero, determining that the bus is out of voltage;
and if the state of the variable-height switch is the closing position, the state of the variable-middle switch is the closing position, the voltage value of the variable-height bus is zero, and the voltage value of the variable-middle bus is zero, determining that the bus is out of voltage.
In a second aspect, an embodiment of the present invention further provides a voltage loss detection device for a substation bus, including:
the electric quantity acquisition module is used for acquiring the voltage value of a bus and the current value of a low-voltage switch, wherein the bus is connected with a transformer of a transformer substation through the low-voltage switch, and the buses are connected through a bus-bar switch;
the transformer substation type determining module is used for determining the type of the transformer substation based on the transformer if the voltage value of the bus is zero and the current value of the low-voltage switch is zero;
the first state identification module is used for identifying the state of the bus-tie switch when the type of the transformer substation is a multi-main transformer substation;
the first voltage-loss condition determining module is used for determining that the bus is out of voltage if the state of the bus-connected switch is split;
the second state identification module is used for identifying the state of the low-voltage switch when the type of the transformer substation is a single main transformer substation;
and the second voltage-loss condition determining module is used for determining the bus voltage loss if the state of the low-voltage switch is a split state.
Optionally, the substation type determining module includes:
the transformer number acquisition statistics sub-module is used for counting the number of transformers equipped in the transformer substation;
the single main transformer determining submodule is used for determining that the type of the transformer substation is a single main transformer substation if the number of the transformers is equal to 1;
and the multi-main-transformer determining submodule is used for determining that the type of the transformer substation is a multi-main-transformer substation if the number of the transformers is larger than 1.
Optionally, the method further comprises:
and the transformer splitting module is used for splitting each transformer in the transformer substation if the state of the bus-tie switch is in a closed position, so that the type of the transformer substation is adjusted from a multi-main-transformer substation to a single-main-transformer substation.
Optionally, the method further comprises:
the winding type determining module is used for determining the type of the winding in the transformer if the state of the low-voltage switch is a combination bit;
and the third voltage loss condition determining module is used for detecting whether the bus is out of voltage or not based on the type of the winding.
Optionally, the transformer is connected with a variable center bus through a variable center switch, and the transformer is connected with a variable high bus through a variable high switch;
the third decompression condition determining module includes:
the first type voltage loss judging submodule is used for detecting whether the bus is out of voltage or not based on the state of the variable-height switch and the voltage value of the variable-height bus if the type of the winding is two windings;
and the second type voltage loss judging sub-module is used for detecting whether the bus is out of voltage or not based on the state of the variable-height switch, the state of the variable-middle switch, the voltage value of the variable-height bus and the voltage value of the variable-middle bus if the winding is three-winding.
Optionally, the first type of voltage loss determination submodule includes:
the first judging unit is used for determining that the bus is out of voltage if the state of the high switch is a split state;
and the second judging unit is used for determining that the bus is out of voltage if the state of the high-voltage switch is in the closed position and the voltage value of the high-voltage bus is zero.
Optionally, the second type of voltage loss determination submodule includes:
the third judging unit is used for determining that the bus is out of voltage if the state of the high-changing switch is the split state and the state of the middle-changing switch is the split state;
a fourth judging unit, configured to determine that the bus is out of voltage if the state of the up switch is a split state, the state of the down switch is a closed state, and the voltage value of the down bus is zero;
a fifth judging unit, configured to determine that the bus is out of voltage if the state of the up switch is a closed position, the state of the down switch is a split position, and the voltage value of the up bus is zero;
and a sixth judging unit, configured to determine that the bus is out of voltage if the state of the up switch is in the on position, the state of the down switch is in the on position, the voltage value of the up bus is zero, and the voltage value of the down bus is zero.
In a third aspect, an embodiment of the present invention further provides a computer apparatus, including:
one or more processors;
a memory for storing one or more programs,
the one or more programs, when executed by the one or more processors, cause the one or more processors to implement the method for detecting a voltage loss of a substation busbar according to the first aspect.
In a fourth aspect, an embodiment of the present invention further provides a computer readable storage medium, where a computer program is stored, where the computer program, when executed by a processor, implements the method for detecting voltage loss of a substation busbar according to the first aspect.
In the embodiment, a voltage value of a bus and a current value of a low-voltage switch are obtained, the bus is connected with a transformer of a transformer substation through the low-voltage switch, and the buses are connected through a bus-bar switch; if the voltage value of the bus is zero and the current value of the low-voltage switch is zero, determining the type of the transformer substation based on the transformer; when the type of the transformer substation is a multi-main transformer substation, the state of the bus-tie switch is identified; if the state of the bus-bar switch is split, determining that the bus is out of voltage; when the type of the transformer substation is a single main transformer substation, the state of the low-voltage switch is identified; if the state of the low-voltage switch is the split state, determining that the bus is out of voltage, taking the topological state as the basis for judging whether the bus is out of voltage, improving the accuracy of the out-of-voltage detection of the complex transmission line and rapidly positioning the fault source can be realized, thereby rapidly isolating the out-of-voltage bus, reducing the operation amount of a dispatcher and a transformer, facilitating rapid power restoration and simultaneously improving the application range of self-healing of the distribution network.
Drawings
Fig. 1 is a flowchart of a method for detecting voltage loss of a bus of a transformer substation according to a first embodiment of the present invention;
fig. 2A is a schematic structural diagram of a multi-main transformer substation according to a first embodiment of the present invention;
fig. 2B is a schematic structural diagram of a single main transformer substation according to a first embodiment of the present invention;
fig. 3 is a flowchart of a method for detecting voltage loss of a bus of a transformer substation according to a second embodiment of the present invention;
fig. 4 is a block diagram of a voltage loss detection device for a bus of a transformer substation according to a third embodiment of the present invention;
fig. 5 is a schematic structural diagram of a computer device according to a fourth embodiment of the present invention.
Detailed Description
The invention is described in further detail below with reference to the drawings and examples. It is to be understood that the specific embodiments described herein are merely illustrative of the invention and are not limiting thereof. It should be further noted that, for convenience of description, only some, but not all of the structures related to the present invention are shown in the drawings.
Example 1
Fig. 1 is a flowchart of a voltage loss detection method for a bus of a transformer substation according to an embodiment of the present invention, where the method may be applied to a case of voltage loss detection according to a topology of the bus, and the method may be performed by a voltage loss detection device for the bus of the transformer substation, where the voltage loss detection device for the bus of the transformer substation may be implemented by software and/or hardware, and may be configured in a computer device, for example, a computer, a server, a workstation, etc., and specifically includes the following steps:
In the present embodiment, as shown in fig. 2A and 2B, the bus bars 211 are connected to the transformer 200 of the substation through the low-voltage switch 242, the bus bars 211 are connected through the bus bar switch, and the bus bars 211 are also called low-voltage bus bars.
In one embodiment, whether the voltage is lost or not can be detected by analyzing the electrical quantity of the bus bar, and in actual operation, a plurality of sensors for detecting the electrical quantity are arranged on the bus bar, and the electrical quantity of the bus bar can be obtained by reading the detection value of the sensors, including the voltage value of the bus bar and the current value of the low-voltage switch.
And 102, if the voltage value of the bus is zero and the current value of the low-voltage switch is zero, determining the type of the transformer substation based on the transformer.
In this embodiment, the electrical quantity of the bus is identified, and if the voltage value of the bus is zero and the current value of the low-voltage switch is zero, it indicates that the power transmission line where the bus is located has failed. In order to improve the accuracy of bus voltage loss detection, a reliable basis is provided for locating a fault source, and the type of the transformer substation can be determined by referring to the setting condition of the transformer.
The transformer is core equipment of an electric locomotive traction power supply system, and is key equipment for ensuring safe and stable operation of the traction power supply system. According to actual operation requirements, a single transformer (namely a single main transformer substation) or a plurality of transformers (namely a plurality of main transformer substations) can be provided for the transformer substation, and the steps of bus voltage loss detection are different for different types of provided transformers.
When determining the type of the transformer substation, counting the number of transformers equipped with the transformer substation, if the number of transformers is equal to 1, determining the type of the transformer substation as a single main transformer substation, and executing step 104; if the number of transformers is greater than 1, determining that the type of the transformer substation is a multi-main transformer substation, and executing step 103.
It should be noted that, the transformer substation may configure a plurality of transformers or a plurality of bus-tie switches according to actual operation requirements, and the number of transformers and bus-tie switches is not limited in this embodiment.
And 103, when the type of the transformer substation is a multi-main transformer substation, identifying the state of the bus-tie switch.
When the type of the transformer substation is a multi-main transformer substation, the transformer is provided with a plurality of transformers, the transformers are connected with corresponding buses through low-voltage switches, and the buses are connected through bus-tie switches, wherein the bus-tie switches refer to tie switches (namely bus tie switches) for connecting the buses.
Therefore, when the type of the transformer substation is a multi-main transformer substation, whether the bus is out of voltage can be analyzed by identifying the state of the bus-bar switch.
And 104, when the type of the transformer substation is a single main transformer substation, identifying the state of the low-voltage switch.
When the type of the transformer is a single main transformer substation, it means that the substation has one transformer, which is connected to the bus bar through a low-voltage switch, and at this time, whether the bus bar is out of voltage can be analyzed by recognizing the state of the low-voltage switch.
And 105, if the state of the bus-connected switch is the split state, determining that the bus is out of voltage.
In this embodiment, the states of the bus-tie switch are divided into two types, one is a combination bit and the other is a split bit.
If the state of the bus-bar switch is split, the bus voltage loss can be determined.
And 106, if the state of the low switch is a split state, determining that the bus is out of voltage.
In this embodiment, the state of the low switch is divided into two types, one is the on-bit and one is the off-bit.
If the state of the low switch is split, then bus voltage loss can be determined.
In the embodiment, a voltage value of a bus and a current value of a low-voltage switch are obtained, the bus is connected with a transformer of a transformer substation through the low-voltage switch, and the buses are connected through a bus-bar switch; if the voltage value of the bus is zero and the current value of the low-voltage switch is zero, determining the type of the transformer substation based on the transformer; when the type of the transformer substation is a multi-main transformer substation, the state of the bus-tie switch is identified; if the state of the bus-bar switch is split, determining that the bus is out of voltage; when the type of the transformer substation is a single main transformer substation, the state of the low-voltage switch is identified; if the state of the low-voltage switch is the split state, determining that the bus is out of voltage, taking the topological state as the basis for judging whether the bus is out of voltage, improving the accuracy of the out-of-voltage detection of the complex transmission line and rapidly positioning the fault source can be realized, thereby rapidly isolating the out-of-voltage bus, reducing the operation amount of a dispatcher and a transformer, facilitating rapid power restoration and simultaneously improving the application range of self-healing of the distribution network.
Example two
Fig. 3 is a flowchart of a voltage loss detection method for a bus of a transformer substation according to a second embodiment of the present invention, where the method is based on the foregoing embodiment, and further adds an operation of voltage loss detection when a bus-bar switch is in a closed position or a low-voltage switch is in a closed position, and the method specifically includes the following steps:
The buses are connected with a transformer of the transformer substation through the low-voltage switch, and are connected through the bus-bar switch.
And step 303, when the type of the transformer substation is a multi-main transformer substation, identifying the state of the bus-tie switch.
And 304, if the state of the bus-connected switch is the split state, determining that the bus is out of voltage.
And 305, if the state of the bus-tie switch is in the closed position, splitting each transformer in the transformer substation so as to adjust the type of the transformer substation from a multi-main-transformer substation to a single-main-transformer substation.
If the bus-bar switch is in the on-position, the bus of the transformer substation and the line where the bus-bar switch is located are not failed, so that each transformer in the transformer substation can be further logically split, each transformer can be logically and independently regarded as a transformer substation, and the transformer substation is differentiated from a plurality of main transformer substations into a single main transformer substation, so that the bus voltage loss judgment is carried out according to the voltage loss detection steps of a plurality of single main transformer substations.
For example, the multi-main transformer substation shown in fig. 2A is split into a single-main transformer substation a and a main transformer substation B shown in fig. 2B.
In this embodiment, if the state of the low switch is in the on state, the fault source may exist on other buses connected to the transformer.
In practical situations, because the types of windings in the transformer are different from other buses connected with the transformer, the positioning efficiency of the fault source can be improved by determining the types of windings in the transformer and correspondingly adjusting the mode of the voltage loss detection, so that the precision of the voltage loss detection is improved.
In a specific implementation, as shown in fig. 2A and 2B, the transformer of the substation 200 may be connected to the centering bus 220 through a centering switch 243, and the transformer of the substation 200 may be connected to the leveling bus 230 through a leveling switch 244.
The type of windings in the transformer comprises two windings and three windings, wherein the two windings represent that 2 windings are arranged in the transformer, namely 2 voltage levels, at the moment, other buses connected with the transformer substation comprise a high-changing bus and a low-changing bus, a switch on the high-changing bus is a high-changing switch, and a switch on the low-changing bus is a low-changing switch; the three windings represent 3 windings in the transformer, i.e. 3 voltage levels, at which time the bus connected to the transformer comprises a high bus, a medium bus and a low bus, and correspondingly the switch on the high bus is the high switch, the switch on the medium bus is the medium switch and the switch on the low bus is the low switch.
If the winding type is two windings, the state of the heightening switch and the voltage value of the heightening bus can be detected, so that whether the bus loses voltage or not is detected based on the state of the heightening switch and the voltage value of the heightening bus.
In one case, if the state of the high switch is a split, the bus voltage loss can be determined.
In another case, if the state of the high switch is the on state and the voltage value of the high bus is zero, the bus voltage loss can be determined.
If the winding type is three windings, the state of the variable high switch, the state of the variable middle switch, the voltage value of the variable high bus and the voltage value of the variable middle bus can be detected, so that whether the bus loses voltage or not is detected based on the state of the variable high switch, the state of the variable middle switch, the voltage value of the variable high bus and the voltage value of the variable middle bus.
In one case, if the state of the high switch is the split and the state of the medium switch is the split, the bus voltage loss can be determined.
In another case, if the state of the high-going switch is the split state, the state of the medium-going switch is the close state, and the voltage value of the medium-going bus is zero, the bus voltage loss can be determined.
In another case, if the state of the high-voltage switch is the on position, the state of the middle-voltage switch is the off position, and the voltage value of the high-voltage bus is zero, the bus voltage loss can be determined;
in another case, if the state of the high-going switch is on, the state of the medium-going switch is on, the voltage value of the high-going bus is zero, and the voltage value of the medium-going bus is zero, the bus voltage loss can be determined.
In order to ensure the power supply reliability, under the condition that the main power supply of the transformer substation is completely lost, the load of the transformer substation is often reversely supplied to the bus through the ring network circuit, and at the moment, if the PT (potential transformer) is disconnected or the PT is overhauled, the erroneous judgment of the voltage loss of the bus can be caused.
In this operating mode, the function of the cut-off switch for automatically closing the voltage loss of the busbar can therefore be provided manually or automatically.
After judging that the bus is out of voltage, in order to avoid misjudgment caused by the time of reclosing action of the circuit and instantaneous jitter, delay time can be set for the switching switch by matching with the self-healing action time, for example, 30 seconds to 60 seconds.
Of course, the cut-off switch can be set according to the requirement, for example, a certain line is not put into a self-healing function, and the cut-off switch can be locked; the circuit with the self-healing function can not be locked, and erroneous judgment of bus voltage loss can be saved through circuit self-healing under extreme conditions.
It should be noted that, for simplicity of description, the method embodiments are shown as a series of acts, but it should be understood by those skilled in the art that the embodiments are not limited by the order of acts, as some steps may occur in other orders or concurrently in accordance with the embodiments. Further, those skilled in the art will appreciate that the embodiments described in the specification are presently preferred embodiments, and that the acts are not necessarily required by the embodiments of the invention.
Example III
Fig. 4 is a structural block diagram of a voltage loss detection device for a bus of a transformer substation according to a third embodiment of the present invention, which may specifically include the following modules:
the electric quantity acquisition module 401 is used for acquiring a voltage value of a bus and a current value of a low-voltage switch, wherein the bus is connected with a transformer of a transformer substation through the low-voltage switch, and the buses are connected through a bus-bar switch;
a substation type determining module 402, configured to determine a type of the substation based on the transformer if a voltage value of the bus is zero and a current value of the low-voltage switch is zero;
a first state identifying module 403, configured to identify a state of the bus-tie switch when the type of the substation is a multi-main transformer substation;
a first voltage-loss condition determining module 404, configured to determine that the bus is out of voltage if the state of the bus-tie switch is split;
a second state identifying module 405, configured to identify a state of the low-voltage switch when the type of the substation is a single main transformer substation;
and the second voltage-loss condition determining module 406 is configured to determine that the bus is out of voltage if the state of the low switch is a split state.
In one embodiment of the present invention, the substation type determining module 402 includes:
the transformer number acquisition and statistics sub-module is used for counting the number of transformers equipped in the transformer substation;
the single main transformer determining submodule is used for determining that the type of the transformer substation is a single main transformer substation if the number of the transformers is equal to 1;
and the multi-main-transformer determining submodule is used for determining that the type of the transformer substation is a multi-main-transformer substation if the number of the transformers is larger than 1.
In one embodiment of the present invention, further comprising:
and the transformer splitting module is used for splitting each transformer in the transformer substation if the state of the bus-tie switch is in a closed position, so that the type of the transformer substation is adjusted from a multi-main-transformer substation to a single-main-transformer substation.
In one embodiment of the present invention, further comprising:
the winding type determining module is used for determining the type of the winding in the transformer if the state of the low-voltage switch is a combination bit;
and the third voltage loss condition determining module is used for detecting whether the bus is out of voltage or not based on the type of the winding.
In one embodiment of the invention, the transformer is connected with a medium bus through a medium switch, and the transformer is connected with a high bus through a high switch;
the third decompression condition determining module includes:
the first type voltage loss judging submodule is used for detecting whether the bus is out of voltage or not based on the state of the variable-height switch and the voltage value of the variable-height bus if the type of the winding is two windings;
and the second type voltage loss judging sub-module is used for detecting whether the bus is out of voltage or not based on the state of the variable-height switch, the state of the variable-middle switch, the voltage value of the variable-height bus and the voltage value of the variable-middle bus if the winding is three-winding.
In one embodiment of the present invention, the first type of decompression determination submodule includes:
the first judging unit is used for determining that the bus is out of voltage if the state of the high switch is a split state;
and the second judging unit is used for determining that the bus is out of voltage if the state of the high-voltage switch is in the closed position and the voltage value of the high-voltage bus is zero.
In one embodiment of the present invention, the second type of decompression determination submodule includes:
the third judging unit is used for determining that the bus is out of voltage if the state of the high-changing switch is the split state and the state of the middle-changing switch is the split state;
a fourth judging unit, configured to determine that the bus is out of voltage if the state of the up switch is a split state, the state of the down switch is a closed state, and the voltage value of the down bus is zero;
a fifth judging unit, configured to determine that the bus is out of voltage if the state of the up switch is a closed position, the state of the down switch is a split position, and the voltage value of the up bus is zero;
and a sixth judging unit, configured to determine that the bus is out of voltage if the state of the up switch is in the on position, the state of the down switch is in the on position, the voltage value of the up bus is zero, and the voltage value of the down bus is zero.
The voltage loss detection device for the substation bus provided by the embodiment of the invention can execute the voltage loss detection method for the substation bus provided by any embodiment of the invention, and has the corresponding functional modules and beneficial effects of the execution method.
Example IV
Fig. 5 is a schematic structural diagram of a computer device according to a fourth embodiment of the present invention. Fig. 5 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. 5 is merely an example and should not be construed as limiting the functionality and scope of use of embodiments of the present invention.
As shown in FIG. 5, the computer device 12 is in the form of a general purpose computing device. Components of computer device 12 may include, but are not limited to: one or more processors or processing units 16, a system memory 28, a bus 18 that connects the various system components, including the system memory 28 and the processing units 16.
The system 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. The 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 or write to non-removable, nonvolatile magnetic media (not shown in FIG. 5, commonly referred to as a "hard disk drive"). Although not shown in fig. 5, a magnetic disk drive for reading from and writing to a removable non-volatile magnetic disk (e.g., a "floppy disk"), and an optical disk drive for reading from or writing to a removable non-volatile optical disk (e.g., a CD-ROM, DVD-ROM, or other optical media) may be provided. In such cases, each drive may be coupled to bus 18 through one or more data medium interfaces. Memory 28 may include at least one program product having a set (e.g., at least one) of program modules 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 in, for example, 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 or some combination of which may include an implementation of a network environment. Program modules 42 generally perform the functions and/or methods of the embodiments described herein.
The computer device 12 may also communicate with one or more external devices 14 (e.g., keyboard, pointing device, display 24, etc.), one or more devices that enable a user to interact with the computer device 12, and/or any devices (e.g., network card, modem, etc.) that enable the computer device 12 to communicate with one or more other computing devices. Such communication may occur through an input/output (I/O) interface 22. Moreover, computer device 12 may also communicate with one or more networks such as a Local Area Network (LAN), a Wide Area Network (WAN) and/or a public network, such as the Internet, through network adapter 20. As shown, network adapter 20 communicates with other modules of computer device 12 via bus 18. It should be appreciated that although not shown, other hardware and/or software modules may be used in connection with computer device 12, including, but not limited to: microcode, device drivers, redundant processing units, external disk drive arrays, RAID systems, tape drives, data backup storage systems, and the like.
The processing unit 16 executes various functional applications and data processing by running a program stored in the system memory 28, for example, to implement the method for detecting voltage loss of the substation bus provided by the embodiment of the present invention.
Example five
The fifth embodiment of the present invention further provides a computer readable storage medium, on which a computer program is stored, where the computer program when executed by a processor implements each process of the above-mentioned method for detecting a voltage loss of a bus of a transformer substation, and the same technical effect can be achieved, so that repetition is avoided, and no further description is given here.
The computer readable storage medium may include, for example, but is not limited to, an electronic, magnetic, optical, electromagnetic, infrared, or semiconductor system, apparatus, or device, or a combination of any 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 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.
Note that the above is only a preferred embodiment of the present invention and the technical principle applied. 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, while the invention has been described in connection with the above embodiments, the invention is not limited to the embodiments, but may be embodied in many other equivalent forms without departing from the spirit or scope of the invention, which is set forth in the following claims.
Claims (9)
1. The voltage loss detection method for the bus of the transformer substation is characterized by comprising the following steps of:
the method comprises the steps of obtaining a voltage value of a bus and a current value of a low-voltage switch, wherein the bus is connected with a transformer of a transformer substation through the low-voltage switch, and the buses are connected through a bus-bar switch;
if the voltage value of the bus is zero and the current value of the low-voltage switch is zero, determining the type of the transformer substation based on the transformer;
when the type of the transformer substation is a multi-main transformer substation, the state of the bus-tie switch is identified;
if the state of the bus-bar switch is split, determining that the bus is out of voltage;
when the type of the transformer substation is a single main transformer substation, the state of the low-voltage switch is identified;
if the state of the low-voltage switch is a split state, determining that the bus is out of voltage;
after identifying the state of the bus-tie switch when the type of the substation is a multi-main substation, the method further comprises:
and if the state of the bus-tie switch is in the closed position, splitting each transformer in the transformer substation so as to adjust the type of the transformer substation from a multi-main-transformer substation to a single-main-transformer substation.
2. The method of claim 1, wherein said determining the type of the substation based on the transformer comprises:
counting the number of transformers equipped in the transformer substation;
if the number of the transformers is equal to 1, determining that the type of the transformer substation is a single main transformer substation;
and if the number of the transformers is greater than 1, determining that the type of the transformer substation is a multi-main transformer substation.
3. The method according to claim 1 or 2, characterized in that after identifying the state of the low-voltage switch when the type of substation is a single main transformer substation, the method further comprises:
if the state of the low-voltage switch is a combination position, determining the type of a winding in the transformer;
and detecting whether the bus is out of voltage based on the type of the winding.
4. A method according to claim 3, wherein the transformer is connected to a neutral bus via a neutral switch and the transformer is connected to a high bus via a high switch;
the detecting whether the bus is out of voltage based on the type of the winding includes:
if the type of the winding is two windings, detecting whether the bus is out of voltage or not based on the state of the variable-height switch and the voltage value of the variable-height bus;
and if the winding type is three windings, detecting whether the bus is out of voltage or not based on the state of the variable-height switch, the state of the variable-middle switch, the voltage value of the variable-height bus and the voltage value of the variable-middle bus.
5. The method of claim 4, wherein detecting whether the bus is out of voltage based on the state of the high switch, the voltage value of the high bus, comprises:
if the state of the high-voltage switch is a split state, determining that the bus is out of voltage;
and if the state of the high-voltage changing switch is a combination position and the voltage value of the high-voltage changing bus is zero, determining that the bus is out of voltage.
6. The method of claim 4, wherein the detecting whether the bus is out of voltage based on the state of the high switch, the state of the medium switch, the voltage value of the high bus, the voltage value of the medium bus, comprises:
if the state of the high-changing switch is the split state and the state of the middle-changing switch is the split state, determining that the bus is out of voltage;
if the state of the variable-height switch is a split state, the state of the variable-middle switch is a combined state, and the voltage value of the variable-middle bus is zero, determining that the bus is out of voltage;
if the state of the variable-height switch is the closing position, the state of the variable-middle switch is the dividing position, and the voltage value of the variable-height bus is zero, determining that the bus is out of voltage;
and if the state of the variable-height switch is the closing position, the state of the variable-middle switch is the closing position, the voltage value of the variable-height bus is zero, and the voltage value of the variable-middle bus is zero, determining that the bus is out of voltage.
7. The utility model provides a transformer substation's generating line loss of voltage detection device which characterized in that includes:
the electric quantity acquisition module is used for acquiring the voltage value of a bus and the current value of a low-voltage switch, wherein the bus is connected with a transformer of a transformer substation through the low-voltage switch, and the buses are connected through a bus-bar switch;
the transformer substation type determining module is used for determining the type of the transformer substation based on the transformer if the voltage value of the bus is zero and the current value of the low-voltage switch is zero;
the first state identification module is used for identifying the state of the bus-tie switch when the type of the transformer substation is a multi-main transformer substation;
the first voltage-loss condition determining module is used for determining that the bus is out of voltage if the state of the bus-connected switch is split;
the second state identification module is used for identifying the state of the low-voltage switch when the type of the transformer substation is a single main transformer substation;
the second voltage-losing condition determining module is used for determining that the bus is out of voltage if the state of the low-voltage switch is a split state;
and the transformer splitting module is used for splitting each transformer in the transformer substation if the state of the bus-tie switch is in a closed position, so that the type of the transformer substation is adjusted from a multi-main-transformer substation to a single-main-transformer substation.
8. A computer device, the computer device comprising:
one or more processors;
a memory for storing one or more programs,
when the one or more programs are executed by the one or more processors, the one or more processors implement the method for detecting a voltage loss of a substation busbar according to any one of claims 1 to 6.
9. A computer-readable storage medium, characterized in that the computer-readable storage medium has stored thereon a computer program which, when executed by a processor, implements a method for detecting a voltage loss of a busbar of a substation according to any one of claims 1 to 6.
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| CN109861218A (en) * | 2019-03-14 | 2019-06-07 | 深圳供电局有限公司 | A kind of 10kV backup auto-activating device |
| CN110277828B (en) * | 2019-06-24 | 2023-04-25 | 中国能源建设集团广东省电力设计研究院有限公司 | Alternating-current bus rapid backup automatic switching control method based on flexible direct-current distribution network technology |
| CN111915029B (en) * | 2020-05-27 | 2023-01-20 | 广东电网有限责任公司 | Intelligent recording system and method for bus voltage loss |
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