CN112684289B - Non-full-phase operation state identification method and device, electrical protection equipment and medium - Google Patents
Non-full-phase operation state identification method and device, electrical protection equipment and medium Download PDFInfo
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- CN112684289B CN112684289B CN202011479660.4A CN202011479660A CN112684289B CN 112684289 B CN112684289 B CN 112684289B CN 202011479660 A CN202011479660 A CN 202011479660A CN 112684289 B CN112684289 B CN 112684289B
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Abstract
The embodiment of the invention discloses a method and a device for identifying a non-full-phase running state, electrical protection equipment and a medium. The method for identifying the non-full-phase running state comprises the following steps: acquiring three-phase voltage and each inter-phase voltage angle value of the ultra-high voltage transmission line, and determining each inter-phase angle change rate according to each inter-phase voltage angle value; determining a non-full-phase according to the three-phase voltage and the angle change rate of each phase; and generating a non-full phase alarm signal corresponding to the non-full phase after the non-full phase is determined, and outputting the non-full phase alarm signal and the non-full phase. The technical scheme of the embodiment of the invention realizes accurate identification of the non-full-phase running state, shortens the identification time of the non-full-phase running state and avoids high-resistance protection misoperation.
Description
Technical Field
The embodiment of the invention relates to the technical field of asymmetric operation of power systems, in particular to a method and a device for identifying a non-full-phase operation state, electrical protection equipment and a medium.
Background
The non-full-phase operation is a special condition of asymmetric operation of a power system, a single-phase reclosing mode is widely used for power grids of more than 220kV in China, and when a single-phase earth fault occurs on an ultrahigh voltage power transmission line, the line enters a non-full-phase operation state after the fault phase is removed by a relay protection device. For a high-voltage large-current grounding system, the non-full-phase operation is the same as the short circuit of a power system, and positive sequence, negative sequence and zero sequence currents and voltages can occur, so that protection misoperation is generated, and therefore, the rapid identification of the non-full-phase operation state and the locking of corresponding protection are very important.
For the identification of the non-full-phase operating state, the following methods are mainly used at present: the method for judging the combination of each phase current and the position of the circuit breaker judges the non-full-phase running state of the power transmission line after a short time delay when no current flows in a certain phase jump position of the power transmission line and currents flow in other phase combination positions; and (4) judging the non-full-phase running state of the power transmission line according to the voltage and current of each sequence by a symmetrical component method.
Because the existing electric protection equipment is not connected with a breaker at the position, the existing electric protection equipment mainly adopts a symmetrical component method to judge the non-full-phase operation state, but when the electric power system is in non-full-phase operation, the voltage and the current have certain decay time, and the identification of the non-full-phase operation state has certain hysteresis.
Disclosure of Invention
The embodiment of the invention provides a non-full-phase running state identification method and device, electrical protection equipment and a medium, which are used for accurately identifying the non-full-phase running state, shortening the identification time of the non-full-phase running state and avoiding high-resistance protection misoperation.
In a first aspect, an embodiment of the present invention provides a method for identifying a non-full-phase operating state, where the method includes:
acquiring three-phase voltage and each inter-phase voltage angle value of the ultra-high voltage transmission line, and determining each inter-phase angle change rate according to each inter-phase voltage angle value;
determining a non-full-phase according to the three-phase voltage and the angle change rate of each phase;
and generating a non-full phase alarm signal corresponding to the non-full phase after the non-full phase is determined, and outputting the non-full phase alarm signal and the non-full phase.
In a second aspect, an embodiment of the present invention further provides a device for identifying a non-full-phase operating state, where the device includes:
the numerical value acquisition module is used for acquiring the three-phase voltage and each inter-phase voltage angle value of the ultra-high voltage transmission line and determining each inter-phase angle change rate according to each inter-phase voltage angle value;
the determining module for determining the non-full-phase is used for determining the non-full-phase according to the three-phase voltage and the angle change rate of each phase;
and the data output module is used for generating a non-full phase alarm signal corresponding to the non-full phase after the non-full phase is determined, and outputting the non-full phase alarm signal and the non-full phase.
In a third aspect, an embodiment of the present invention further provides an electrical protection device, where the electrical protection device includes:
one or more processors;
a storage device for storing a plurality of programs,
when at least one of the programs is executed by the one or more processors, the one or more processors are caused to implement a non-full-phase operation state identification method provided by the embodiment of the first aspect of the present invention.
In a fourth aspect, an 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 the method for identifying a non-full-phase operating state provided in the embodiment of the first aspect of the present invention.
According to the technical scheme of the embodiment of the invention, the three-phase voltage of the ultra-high voltage transmission line and the angle value of each phase voltage are obtained, and the change rate of each phase angle is determined according to the angle value of each phase voltage; determining a non-full-phase according to the three-phase voltage and the angle change rate of each phase; and generating a non-full phase alarm signal corresponding to the non-full phase after the non-full phase is determined, and outputting the non-full phase alarm signal and the non-full phase. The problem that the traditional non-full-phase identification method can identify the non-full-phase running state only after the voltage and the current are stable and has hysteresis for identifying the non-full-phase running state is solved, so that the non-full-phase running state is accurately identified, the identification time of the non-full-phase running state is shortened, and high-resistance protection misoperation is avoided.
Drawings
Fig. 1 is a schematic flowchart of a non-full-phase operating state identification method according to an embodiment of the present invention;
fig. 2A is a schematic flowchart of a non-full-phase operating state identification method according to a second embodiment of the present invention;
fig. 2B is a schematic diagram of a non-full-phase operation state identification result provided in the embodiment of the present invention;
fig. 3 is a schematic flowchart of a non-full-phase operation state identification method according to a third embodiment of the present invention;
fig. 4 is a schematic structural diagram of a non-full-phase operation state identification device according to a fourth embodiment of the present invention;
fig. 5 is a schematic hardware structure diagram of an electrical protection device according to a fifth embodiment of the present invention.
Detailed Description
In order to make the objects, technical solutions and advantages of the present invention more apparent, embodiments of the present invention are described in further detail below with reference to the accompanying drawings. 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 but not all of the relevant aspects of the present invention are shown in the drawings. Before discussing exemplary embodiments in more detail, it should be noted that some exemplary embodiments are described as processes or methods depicted as flowcharts. Although a flowchart may describe the operations (or steps) as a sequential process, many of the operations can be performed in parallel, concurrently or simultaneously. In addition, the order of the operations may be re-arranged. The process may be terminated when its operations are completed, but may have additional steps not included in the figure. The processes may correspond to methods, functions, procedures, subroutines, and the like.
Example one
Fig. 1 is a schematic flow chart of a non-full-phase operating state identification method according to an embodiment of the present invention, where the embodiment is applicable to a situation where a high reactance protection device in an ultra-high voltage transmission line rapidly identifies a non-full-phase operating state, and the method may be executed by the non-full-phase operating state identification device, and the device may be implemented in a form of software and/or hardware. The method specifically comprises the following steps:
s110, obtaining three-phase voltage and each inter-phase voltage angle value of the ultra-high voltage transmission line, and determining each inter-phase angle change rate according to each inter-phase voltage angle value.
Specifically, the three-phase voltage and each inter-phase voltage angle value of the ultra-high voltage transmission line are simultaneously acquired through the electrical protection equipment, and the three-phase voltage and each inter-phase voltage angle value of the ultra-high voltage transmission line can be simultaneously acquired through the electrical protection equipment. Alternatively, the electrical protection device may be a high impedance protection device. The three-phase voltage and each phase voltage angle value of the ultra-high voltage transmission line are simultaneously acquired through the high-impedance protection device, and the three-phase voltage and each phase voltage angle value of the ultra-high voltage transmission line can be simultaneously displayed and acquired through a display screen of the high-impedance protection device, or the three-phase voltage and each phase voltage angle value of the ultra-high voltage transmission line are simultaneously displayed and acquired through a display device connected with the high-impedance protection device. The display device connected with the high-impedance protection device can be an independent display screen or intelligent terminal equipment with the display screen, and the intelligent terminal equipment can be electronic equipment such as a computer and a tablet.
It can be understood that when the three-phase voltage of the high-voltage transmission line is not in a non-full-phase operation state, the angle value of each inter-phase voltage does not change within the acquisition time of the electrical protection equipment, and the angle change rate of each inter-phase voltage is zero; if at least one phase of the three-phase voltage of the high-voltage transmission line is in a non-full-phase operation state, the phase angle between one phase in the non-full-phase operation state and the other two phases is changed, namely the phase angle change rate between the one phase in the non-full-phase operation state and the other two phases is not kept unchanged. That is, the phase corresponding to the non-full-phase operation state of the ultra-high voltage transmission line can be quickly identified through the phase angle change rate of one phase in the non-full-phase operation state.
And S120, determining the non-full-phase according to the three-phase voltage and the angle change rate of each phase.
Specifically, when a certain phase voltage of three-phase voltages is in a non-full-phase operation moment, the frequency of the phase voltage corresponding to the phase voltage is reduced, the frequencies of other two-phase voltages are unchanged, meanwhile, one phase-to-phase voltage angle related to the phase voltage is increased by a fixed slope, the other phase-to-phase voltage angle is decreased by a fixed slope, and the irrelevant phase-to-phase voltage angle is maintained unchanged. And then the phase voltage values of the three-phase voltage are combined to be used as an auxiliary criterion, and the non-full-phase is determined according to the auxiliary criterion.
On the basis of the above embodiment, determining a non-full-phase according to the three-phase voltage and the angle change rate of each phase includes: and if the maximum phase voltage value in the three-phase voltage is greater than a first rated voltage value, the minimum phase voltage value in the three-phase voltage is greater than a second rated voltage value, the maximum phase angle change rate in the phase angle change rates is greater than a first angle change rate threshold value, and the minimum phase angle change rate in the phase angle change rates is less than a second angle change rate threshold value, determining that the phase is not a full phase.
The first angle change rate threshold value and the second angle change rate threshold value may be set by a person skilled in the art according to selection of actual extra-high voltage transmission lines by fixed values, and optionally, the first angle change rate threshold value may be 5red/s, and the second angle change rate threshold value may be 1 red/s.
The first rated voltage value and the second rated voltage value can be set by a person skilled in the art according to the selection of actual extra-high voltage transmission lines. Alternatively, the first rated voltage value may be 0.8 times the rated voltage value, and the second rated voltage value may be 0.5 times the rated voltage value.
And S130, generating a non-full phase alarm signal corresponding to the non-full phase after determining the non-full phase, and outputting the non-full phase alarm signal and the non-full phase.
The non-full-phase alarm signal is used for sending an alarm instruction to a person skilled in the art when the extra-high voltage transmission line is in a non-full-phase operating state, and the non-full-phase alarm signal may alarm through an alarm sound, may also alarm through sending an indicator light, and may also send an alarm sound and send an indicator light at the same time to alarm.
In order to ensure that the non-full-phase determined as the non-full-phase operation state is not a short-time or instant fault capable of automatically recovering the operation, before generating a non-full-phase alarm signal corresponding to the non-full-phase after determining the non-full-phase, the method further comprises the following steps: generating a non-full phase signal corresponding to the non-full phase; and if the duration of the non-full-phase operation state of the non-full-phase corresponding to the non-full-phase signal is greater than the delay duration of a preset signal, generating a non-full-phase alarm signal corresponding to the non-full-phase.
The preset signal delay time duration may be selected and set by a person skilled in the art according to an actual extra-high voltage transmission line, and the specific time length of the preset signal delay time duration is not limited in any way in this embodiment, and the above is only an explanation.
The electric protection equipment can be provided with an alarm device in advance, namely, when the alarm device detects that the three-phase voltage of the current ultrahigh voltage transmission line has a non-full-phase operation state, a target non-full-phase alarm signal is directly output, and the target non-full-phase alarm signal is used for outputting the non-full-phase corresponding to the non-full-phase operation state and the target non-full-phase alarm signal to technicians in the field so as to realize alarm.
On the basis of the above embodiment, generating a non-full phase alarm signal corresponding to the non-full phase after determining the non-full phase comprises: and if the duration of the non-full-phase operation state of the non-full-phase corresponding to the non-full-phase signal is less than or equal to the delay duration of a preset signal and a target non-full-phase alarm signal is obtained, generating a non-full-phase alarm signal corresponding to the non-full-phase. And if the duration of the non-full-phase operation state of the non-full-phase corresponding to the non-full-phase signal is less than or equal to the preset signal delay duration and a target non-full-phase alarm signal is not obtained, determining that the ultrahigh-voltage transmission line is not in the non-full-phase operation state.
The embodiment only excludes that the ultrahigh voltage transmission line is not in the non-full-phase operation state, and does not explain and analyze the specific operation state of the ultrahigh voltage transmission line.
On the basis of the above embodiment, determining a non-full-phase according to the three-phase voltage and the angle change rate of each phase includes: and if the maximum phase voltage value in the three-phase voltage is less than or equal to a first rated voltage value, determining that the ultrahigh voltage transmission line is not in a non-full-phase operation state.
On the basis of the above embodiment, the method for identifying the non-full-phase operation state further includes: and respectively sending the non-full-phase alarm signal and the non-full-phase alarm signal to a remote server so as to enable the remote server to carry out fault alarm.
The remote server is used for alarming to technicians in the field after receiving the non-full-phase alarm signal and the non-full-phase, and the non-full-phase alarm signal and the non-full-phase can be displayed on a display screen of the remote server. The display screen of the remote server may be an independent display screen or a terminal device with a display screen, and optionally, the remote server may be, but is not limited to, a computer, a tablet, or a smart wearable device.
According to the technical scheme of the embodiment of the invention, the three-phase voltage of the ultra-high voltage transmission line and the angle value of each phase voltage are obtained, and the change rate of each phase angle is determined according to the angle value of each phase voltage; determining a non-full-phase according to the three-phase voltage and the angle change rate of each phase; and generating a non-full phase alarm signal corresponding to the non-full phase after the non-full phase is determined, and outputting the non-full phase alarm signal and the non-full phase. The problem that the traditional non-full-phase identification method can identify the non-full-phase running state only after the voltage and the current are stable and has hysteresis for identifying the non-full-phase running state is solved, so that the non-full-phase running state is accurately identified, the identification time of the non-full-phase running state is shortened, and high-resistance protection misoperation is avoided.
Example two
Fig. 2A is a schematic flowchart of a non-full-phase operating state identification method according to a second embodiment of the present invention. The present embodiment is optimized based on the above embodiments.
Correspondingly, the method of the embodiment specifically includes:
s210, obtaining three-phase voltage and each inter-phase voltage angle value of the ultra-high voltage transmission line, and determining each inter-phase angle change rate according to each inter-phase voltage angle value.
S220, if the maximum phase voltage value in the three-phase voltage is greater than a first rated voltage value, the minimum phase voltage value in the three-phase voltage is greater than a second rated voltage value, the maximum inter-phase angle change rate in the inter-phase angle change rates is greater than a first angle change rate threshold value, and the minimum inter-phase angle change rate in the inter-phase angle change rates is less than a second angle change rate threshold value, determining a non-full-phase.
Exemplarily, assuming that the three-phase voltages are an a-phase voltage, a B-phase voltage and a C-phase voltage respectively, judging whether the maximum phase voltage value in the a-phase voltage, the B-phase voltage and the C-phase voltage is greater than a first rated voltage value, if so, continuing to identify the non-full-phase operation state; and if the maximum phase voltage value in the A phase voltage, the B phase voltage and the C phase voltage is less than or equal to a first rated voltage value, determining that the ultrahigh voltage transmission line is not in a non-full-phase operation state.
Fig. 2B is a schematic diagram of a non-full-phase operation state identification result provided in the embodiment of the present invention. Referring to fig. 2B, the abscissa is time, and the abscissa includes simulation results of phase voltages and phase-to-phase angles at the moment when the phase a, the phase B, and the phase C are not full-phase, when the phase B is in a non-full-phase operating state, the phase-to-phase voltage angle of the phase AB and the phase-to-phase voltage angle of the phase BC change, and the phase-to-phase voltage angle of the phase AC remains unchanged, at this time, the maximum phase-to-phase voltage angle change rate changes, but the minimum phase-to-phase voltage angle change rate remains unchanged.
Further, whether the minimum phase voltage of the a-phase voltage, the B-phase voltage and the C-phase voltage is greater than a second rated voltage value, whether the maximum phase voltage angle change rate of the AB-phase voltage angle change rate, the AC-phase voltage angle change rate and the BC-phase voltage angle change rate is greater than a first angle change rate threshold value, and whether the minimum phase voltage angle change rate of the AB-phase voltage angle change rate, the AC-phase voltage angle change rate and the BC-phase voltage angle change rate is less than a second angle change rate threshold value is judged, and the non-full-phase can be further determined only if the three conditions are met.
Specifically, when the BC-phase angle difference ang (ubc) is 120 degrees and the BC-phase voltage angle change rate dagg (ubc) is 0, it is determined that the a phase is in a non-full-phase operation state; when the CA interphase angle difference ang (Uca) is 120 degrees and the AC phase interphase voltage angle change rate dagg (Uca) is 0, the phase B is in a non-full-phase operation state; when the angle difference ang (Uab) between the phases AB is 120 degrees and the voltage angle change rate dagg (Uab) between the phases AB is 0, the phase C is in a non-full-phase operation state.
And S230, generating a non-full phase signal corresponding to the non-full phase.
S240, generating a non-full phase alarm signal corresponding to the non-full phase after determining the non-full phase, and outputting the non-full phase alarm signal and the non-full phase.
Specifically, if the duration of the non-full-phase operation state of the non-full-phase corresponding to the non-full-phase signal is longer than the delay duration of a preset signal, a non-full-phase alarm signal corresponding to the non-full-phase is generated.
Further, on the basis of the above embodiment, generating a non-full phase alarm signal corresponding to the non-full phase after determining the non-full phase comprises: and if the duration of the non-full-phase operation state of the non-full-phase corresponding to the non-full-phase signal is less than or equal to the delay duration of a preset signal and a target non-full-phase alarm signal is obtained, generating a non-full-phase alarm signal corresponding to the non-full-phase. And if the duration of the non-full-phase operation state of the non-full-phase corresponding to the non-full-phase signal is less than or equal to the preset signal delay duration and a target non-full-phase alarm signal is not obtained, determining that the ultrahigh-voltage transmission line is not in the non-full-phase operation state.
With continued reference to fig. 2B, when phase B is in the non-full-phase operating state, phase B will exhibit the phase identification result at the identified instant, and at the same time, a non-full-phase alarm signal is generated to alarm.
And S250, respectively sending the non-full-phase alarm signal and the non-full-phase alarm signal to a remote server so as to enable the remote server to carry out fault alarm.
According to the technical scheme of the embodiment of the invention, the method for quickly identifying the non-full-phase state by high-impedance protection is formed by utilizing the characteristics that the frequency of the corresponding fault phase voltage is reduced and the frequency of other two-phase voltage is unchanged at the moment when the ultra-high voltage transmission line is in non-full-phase operation, one phase voltage angle related to the fault phase is increased by a fixed slope and the other phase voltage angle is decreased by a fixed slope, and the irrelevant phase voltage angle is maintained unchanged.
EXAMPLE III
Fig. 3 is a schematic flow chart of a non-full-phase operation state identification method according to a third embodiment of the present invention. The technical scheme of the embodiment of the invention is further optimized on the basis of the embodiment. The method of the embodiment specifically includes:
s310, obtaining three-phase voltage and each inter-phase voltage angle value of the ultra-high voltage transmission line, and determining each inter-phase angle change rate according to each inter-phase voltage angle value.
And S320, judging whether the maximum phase voltage value in the three-phase voltage is greater than a first rated voltage value, if so, executing a step S330, and if not, executing a step S390.
S330, judging whether the minimum phase voltage value in the three-phase voltage is larger than a second rated voltage value, whether the maximum inter-phase angle change rate in the inter-phase angle change rates is larger than a first angle change rate threshold value, and whether the minimum inter-phase angle change rate in the inter-phase angle change rates is smaller than a second angle change rate threshold value, if yes, executing a step S340, and if not, executing a step S370.
And S340, determining the non-full phase, and generating a non-full phase signal corresponding to the non-full phase.
And S350, judging whether the duration of the non-full-phase operation state of the non-full-phase corresponding to the non-full-phase signal is greater than the delay duration of a preset signal, if so, executing a step S360, and if not, executing a step S370.
And S360, generating non-full phase alarm signals corresponding to the non-full phase.
And S370, judging whether a target non-full-phase alarm signal is acquired, if so, executing a step S380, and if not, executing a step S390.
And S380, outputting the non-full phase alarm signal and the non-full phase.
And S390, determining that the ultrahigh voltage transmission line is not in a non-full-phase operation state.
Example four
Fig. 4 is a schematic structural diagram of a non-full-phase operating state identification device according to a fourth embodiment of the present invention, which is applicable to a situation where a high reactance protection device in an ultra-high voltage transmission line rapidly identifies a non-full-phase operating state.
As shown in fig. 4, the apparatus includes: a value obtaining module 410, a determination non-full phase determining module 420 and a data output module 430, wherein:
the numerical value obtaining module 410 is used for obtaining three-phase voltages and phase-to-phase voltage angle values of the extra-high voltage transmission line and determining phase-to-phase angle change rates according to the phase-to-phase voltage angle values;
a determining non-full-phase determining module 420, configured to determine a non-full-phase according to the three-phase voltage and the change rate of each inter-phase angle;
and a data output module 430, configured to generate a non-full phase alarm signal corresponding to the non-full phase after determining the non-full phase, and output the non-full phase alarm signal and the non-full phase.
The non-full-phase operation state recognition device of the embodiment determines the change rate of each inter-phase angle according to each inter-phase voltage angle value by acquiring the three-phase voltage and each inter-phase voltage angle value of the ultra-high voltage transmission line; determining a non-full-phase according to the three-phase voltage and the angle change rate of each phase; and generating a non-full phase alarm signal corresponding to the non-full phase after the non-full phase is determined, and outputting the non-full phase alarm signal and the non-full phase. The problem that the traditional non-full-phase identification method can identify the non-full-phase running state only after the voltage and the current are stable and has hysteresis for identifying the non-full-phase running state is solved, so that the non-full-phase running state is accurately identified, the identification time of the non-full-phase running state is shortened, and high-resistance protection misoperation is avoided.
On the basis of the above embodiments, determining a non-full phase according to the three-phase voltage and the angle change rate of each phase includes:
and if the maximum phase voltage value in the three-phase voltage is greater than a first rated voltage value, the minimum phase voltage value in the three-phase voltage is greater than a second rated voltage value, the maximum phase angle change rate in the phase angle change rates is greater than a first angle change rate threshold value, and the minimum phase angle change rate in the phase angle change rates is less than a second angle change rate threshold value, determining that the phase is not a full phase.
On the basis of the above embodiments, before generating the non-full phase alarm signal corresponding to the non-full phase after determining the non-full phase, the method further includes:
generating a non-full phase signal corresponding to the non-full phase;
correspondingly, generating a non-full phase alarm signal corresponding to the non-full phase after determining the non-full phase comprises:
and if the duration of the non-full-phase operation state of the non-full-phase corresponding to the non-full-phase signal is greater than the delay duration of a preset signal, generating a non-full-phase alarm signal corresponding to the non-full-phase.
On the basis of the above embodiments, generating a non-full phase alarm signal corresponding to the non-full phase after determining the non-full phase comprises:
and if the duration of the non-full-phase operation state of the non-full-phase corresponding to the non-full-phase signal is less than or equal to the delay duration of a preset signal and a target non-full-phase alarm signal is obtained, generating a non-full-phase alarm signal corresponding to the non-full-phase.
On the basis of the above embodiments, generating a non-full phase alarm signal corresponding to the non-full phase after determining the non-full phase comprises:
and if the duration of the non-full-phase operation state of the non-full-phase corresponding to the non-full-phase signal is less than or equal to the preset signal delay duration and a target non-full-phase alarm signal is not obtained, determining that the ultrahigh-voltage transmission line is not in the non-full-phase operation state.
On the basis of the above embodiments, determining a non-full phase according to the three-phase voltage and the angle change rate of each phase includes:
and if the maximum phase voltage value in the three-phase voltage is less than or equal to a first rated voltage value, determining that the ultrahigh voltage transmission line is not in a non-full-phase operation state.
On the basis of the above embodiments, the apparatus further includes:
and respectively sending the non-full-phase alarm signal and the non-full-phase alarm signal to a remote server so as to enable the remote server to carry out fault alarm.
The non-full-phase operation state identification device provided by each embodiment can execute the non-full-phase operation state identification method provided by any embodiment of the invention, and has the corresponding functional modules and beneficial effects of executing the non-full-phase operation state identification method.
EXAMPLE five
Fig. 5 is a schematic structural diagram of a computer apparatus according to a fifth embodiment of the present invention, as shown in fig. 5, the computer apparatus includes a processor 510, a memory 520, an input device 530, and an output device 540; the number of the processors 510 in the computer device may be one or more, and one processor 510 is taken as an example in fig. 5; the processor 510, the memory 520, the input device 530 and the output device 540 in the computer apparatus may be connected by a bus or other means, and the connection by the bus is exemplified in fig. 5.
The memory 520 is a computer-readable storage medium, and can be used to store software programs, computer-executable programs, and modules, such as program instructions/modules corresponding to the non-full-phase operation state identification method in the embodiment of the present invention (for example, the value obtaining module 410, the non-full-phase determination module 420, and the data output module 430 in the non-full-phase operation state identification apparatus). The processor 510 executes software programs, instructions and modules stored in the memory 520 to execute various functional applications and data processing of the computer device, that is, to implement the above-described non-full-phase operation state identification method.
The memory 520 may mainly include a program storage area and a data storage area, wherein the program storage area may store an operating system, an application program required for at least one function; the storage data area may store data created according to the use of the terminal, and the like. Further, the memory 520 may include high speed random access memory, and may also include non-volatile memory, such as at least one magnetic disk storage device, flash memory device, or other non-volatile solid state storage device. In some examples, memory 520 may further include memory located remotely from processor 510, which may be connected to a computer device through a network. Examples of such networks include, but are not limited to, the internet, intranets, local area networks, mobile communication networks, and combinations thereof.
The input device 530 may be used to receive input numeric or character information and generate key signal inputs related to user settings and function control of the computer apparatus. The output device 540 may include a display device such as a display screen.
Example six
An embodiment of the present invention further provides a storage medium containing computer-executable instructions, where the computer-executable instructions are executed by a computer processor to perform a method for identifying a non-full-phase operating state, and the method includes:
acquiring three-phase voltage and each inter-phase voltage angle value of the ultra-high voltage transmission line, and determining each inter-phase angle change rate according to each inter-phase voltage angle value;
determining a non-full-phase according to the three-phase voltage and the angle change rate of each phase;
and generating a non-full phase alarm signal corresponding to the non-full phase after the non-full phase is determined, and outputting the non-full phase alarm signal and the non-full phase.
Of course, the storage medium provided by the embodiment of the present invention contains computer-executable instructions, and the computer-executable instructions are not limited to the operations of the method described above, and may also perform related operations in the non-full-phase operation state identification method provided by any embodiment of the present invention.
From the above description of the embodiments, it is obvious for those skilled in the art that the present invention can be implemented by software and necessary general hardware, and certainly, can also be implemented by hardware, but the former is a better embodiment in many cases. Based on such understanding, the technical solutions of the present invention may be embodied in the form of a software product, which can be stored in a computer-readable storage medium, such as a floppy disk, a Read-Only Memory (ROM), a Random Access Memory (RAM), a FLASH Memory (FLASH), a hard disk or an optical disk of a computer, and includes several instructions for enabling a computer device (which may be a personal computer, a server, or a network device) to execute the methods according to the embodiments of the present invention.
It should be noted that, in the embodiment of the non-full-phase operation state identification device, the included units and modules are only divided according to functional logic, but are not limited to the above division, as long as the corresponding functions can be realized; in addition, specific names of the functional units are only for convenience of distinguishing from each other, and are not used for limiting the protection scope of the present invention.
It is to be noted that the foregoing is only illustrative of the preferred embodiments of the present invention and the technical principles employed. Those skilled in the art will appreciate that the present invention is not limited to the particular embodiments described herein, and that various obvious changes, rearrangements and substitutions will now be 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 method for identifying a non-full-phase operation state is characterized by comprising the following steps:
acquiring three-phase voltage and each inter-phase voltage angle value of the ultra-high voltage transmission line, and determining each inter-phase angle change rate according to each inter-phase voltage angle value;
if the maximum phase voltage value in the three-phase voltage is greater than a first rated voltage value, the minimum phase voltage value in the three-phase voltage is greater than a second rated voltage value, the maximum phase angle change rate in each phase angle change rate is greater than a first angle change rate threshold value, and the minimum phase angle change rate in each phase angle change rate is less than a second angle change rate threshold value, determining a non-full-phase;
and generating a non-full phase alarm signal corresponding to the non-full phase after the non-full phase is determined, and outputting the non-full phase alarm signal and the non-full phase.
2. The method of claim 1, further comprising, prior to generating a non-full phase alarm signal corresponding to the non-full phase after determining the non-full phase,:
generating a non-full phase signal corresponding to the non-full phase;
correspondingly, generating a non-full phase alarm signal corresponding to the non-full phase after determining the non-full phase comprises:
and if the duration of the non-full-phase operation state of the non-full-phase corresponding to the non-full-phase signal is greater than the delay duration of a preset signal, generating a non-full-phase alarm signal corresponding to the non-full-phase.
3. The method of claim 2, wherein generating a non-full phase alarm signal corresponding to the non-full phase after determining the non-full phase comprises:
and if the duration of the non-full-phase operation state of the non-full-phase corresponding to the non-full-phase signal is less than or equal to the delay duration of a preset signal and a target non-full-phase alarm signal is obtained, generating a non-full-phase alarm signal corresponding to the non-full-phase.
4. The method of claim 1, wherein generating a non-full phase alarm signal corresponding to the non-full phase after determining the non-full phase comprises:
and if the duration of the non-full-phase operation state of the non-full-phase corresponding to the non-full-phase signal is less than or equal to the preset signal delay duration and a target non-full-phase alarm signal is not obtained, determining that the ultrahigh-voltage transmission line is not in the non-full-phase operation state.
5. The method of claim 1, wherein determining a non-full phase from the three-phase voltages and the respective phase-to-phase angular rates of change comprises:
and if the maximum phase voltage value in the three-phase voltage is less than or equal to a first rated voltage value, determining that the ultrahigh voltage transmission line is not in a non-full-phase operation state.
6. The method of claim 1, further comprising:
and respectively sending the non-full-phase alarm signal and the non-full-phase alarm signal to a remote server so as to enable the remote server to carry out fault alarm.
7. A non-all-phase operating state identifying device, comprising:
the numerical value acquisition module is used for acquiring the three-phase voltage and each inter-phase voltage angle value of the ultra-high voltage transmission line and determining each inter-phase angle change rate according to each inter-phase voltage angle value;
a determining non-full-phase determining module, configured to determine a non-full-phase if a maximum phase voltage value of the three-phase voltages is greater than a first rated voltage value, a minimum phase voltage value of the three-phase voltages is greater than a second rated voltage value, a maximum phase angle change rate of the phase angle change rates is greater than a first angle change rate threshold value, and a minimum phase angle change rate of the phase angle change rates is less than a second angle change rate threshold value;
and the data output module is used for generating a non-full phase alarm signal corresponding to the non-full phase after the non-full phase is determined, and outputting the non-full phase alarm signal and the non-full phase.
8. An electrical protection device, characterized in that it comprises:
one or more processors;
storage means for storing one or more programs;
when executed by the one or more processors, cause the one or more processors to implement the non-full phase operational state identification method of any one of claims 1-6.
9. A computer-readable storage medium, on which a computer program is stored which, when being executed by a processor, carries out a method for non-full-phase operating state recognition according to any one of claims 1 to 6.
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