CN113824096B - Method, device, equipment and storage medium for resetting direct current transmission line protection system - Google Patents

Method, device, equipment and storage medium for resetting direct current transmission line protection system Download PDF

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Publication number
CN113824096B
CN113824096B CN202111102028.2A CN202111102028A CN113824096B CN 113824096 B CN113824096 B CN 113824096B CN 202111102028 A CN202111102028 A CN 202111102028A CN 113824096 B CN113824096 B CN 113824096B
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China
Prior art keywords
signal
protection
transmission line
current transmission
action signal
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CN113824096A (en
Inventor
吴健颖
冯雷
彭茂兰
杨光源
梁正
黄炟超
郑伟
刘航
严喜林
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Maintenance and Test Center of Extra High Voltage Power Transmission Co
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Maintenance and Test Center of Extra High Voltage Power Transmission Co
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Priority to CN202111102028.2A priority Critical patent/CN113824096B/en
Publication of CN113824096A publication Critical patent/CN113824096A/en
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    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02H—EMERGENCY PROTECTIVE CIRCUIT ARRANGEMENTS
    • H02H7/00—Emergency protective circuit arrangements specially adapted for specific types of electric machines or apparatus or for sectionalised protection of cable or line systems, and effecting automatic switching in the event of an undesired change from normal working conditions
    • H02H7/26—Sectionalised protection of cable or line systems, e.g. for disconnecting a section on which a short-circuit, earth fault, or arc discharge has occured
    • H02H7/268—Sectionalised protection of cable or line systems, e.g. for disconnecting a section on which a short-circuit, earth fault, or arc discharge has occured for dc systems
    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02H—EMERGENCY PROTECTIVE CIRCUIT ARRANGEMENTS
    • H02H3/00—Emergency protective circuit arrangements for automatic disconnection directly responsive to an undesired change from normal electric working condition with or without subsequent reconnection ; integrated protection
    • H02H3/02—Details
    • H02H3/06—Details with automatic reconnection
    • H02H3/066—Reconnection being a consequence of eliminating the fault which caused disconnection
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
    • Y02E60/00—Enabling technologies; Technologies with a potential or indirect contribution to GHG emissions mitigation
    • Y02E60/60—Arrangements for transfer of electric power between AC networks or generators via a high voltage DC link [HVCD]

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  • Emergency Protection Circuit Devices (AREA)

Abstract

The application relates to a method, a device, equipment and a storage medium for resetting a direct current transmission line protection system, wherein the method comprises the following steps: acquiring electrical measurement data from a high-voltage direct-current transmission system through a direct-current transmission line protection system, and generating a protection action signal according to the electrical measurement data; the protection action signal comprises a first protection action signal; the first protection action signal is used for indicating the high-voltage direct-current transmission system to restart; if the direct current transmission line protection system receives a preset reset signal input by a user and the protection action signal is a first protection action signal, generating a zero clearing signal according to the first protection action signal and the preset reset signal; and resetting the direct current transmission line protection system according to the zero clearing signal. The technical scheme provided by the application can improve the reliability of the direct current transmission line protection system.

Description

Method, device, equipment and storage medium for resetting direct current transmission line protection system
Technical Field
The present disclosure relates to the field of high-voltage direct-current transmission technologies, and in particular, to a method, an apparatus, a device, and a storage medium for resetting a direct-current transmission line protection system.
Background
In the high-voltage direct-current transmission process, the direct-current transmission line protection system can output a restarting protection action signal to the high-voltage direct-current transmission system when the high-voltage direct-current transmission system fails. After receiving the restarted protection action signal, the HVDC system executes the restarted protection action, and needs to perform resetting operations on a counter, an initial value of the protection action signal and the like in the DC transmission line protection system.
In the prior art, an automatic resetting mode is generally adopted to perform resetting operation on the direct current transmission line protection system. However, in the conventional automatic resetting method, when a dc trigger pulse signal for triggering the operation of the inverter in the high-voltage dc transmission system disappears, the resetting operation cannot be performed by the automatic resetting method. Therefore, the conventional direct current transmission line protection system has the problem of poor reliability.
Disclosure of Invention
Based on this, the embodiment of the application provides a method, a device, equipment and a storage medium for resetting a direct current transmission line protection system, which can improve the reliability of the direct current transmission line protection system.
In a first aspect, a method for resetting a protection system of a direct current transmission line is provided, and the method includes:
acquiring electrical measurement data from a high-voltage direct-current transmission system through a direct-current transmission line protection system, and generating a protection action signal according to the electrical measurement data; the protection action signal comprises a first protection action signal; the first protection action signal is used for indicating the high-voltage direct-current transmission system to restart; if the direct current transmission line protection system receives a preset reset signal input by a user and the protection action signal is a first protection action signal, generating a zero clearing signal according to the first protection action signal and the preset reset signal; and resetting the direct current transmission line protection system according to the zero clearing signal.
In one embodiment, the method further comprises:
and if the direct current transmission line protection system does not acquire the trigger pulse signal from the high-voltage direct current transmission system, generating a zero clearing signal.
In one embodiment, the guard action signal further comprises a second guard action signal; generating a protection action signal from the electrical measurement data, comprising:
judging whether the electrical measurement data is abnormal electrical measurement data or not; if the electrical measurement data is abnormal electrical measurement data, generating a protection freezing signal according to the electrical measurement data; based on the protection freezing signal, freezing the current protection action signal of the direct current transmission line protection system, and determining the current protection action signal in a frozen state as a protection action signal; the current protection action signal is a first protection action signal or a second protection action signal.
In one embodiment, generating the protection action signal from the electrical measurement data further comprises:
and if the electrical measurement data is not abnormal electrical measurement data, generating a first protection action signal according to the current value of a counter in the direct current transmission line protection system.
In one embodiment, generating a first protection action signal according to a current value of a counter in a protection system of a direct current transmission line includes:
judging whether the electrical measurement data meet preset protection conditions or not; if the preset protection condition is met, a counter in the direct current transmission line protection system is controlled to count in an accumulating mode according to a preset accumulating rule; and generating a first protection action signal when the counter is accumulated to a first preset protection action delay fixed value.
In one embodiment, the method further comprises:
if the preset protection condition is not met, controlling a counter in the direct current transmission line protection system to count up and down according to a preset accumulation and reduction rule; and resetting the direct current transmission line protection system when the counter is accumulated and reduced to a second preset protection action delay fixed value.
In one embodiment, resetting the dc transmission line protection system according to the clear signal includes:
and resetting the protection action signal of the direct current transmission line protection system and the current value of the counter according to the zero clearing signal.
In a second aspect, there is provided a dc transmission line protection system resetting device, the device comprising:
the acquisition module is used for acquiring electrical measurement data from the high-voltage direct-current transmission system through the direct-current transmission line protection system and generating a protection action signal according to the electrical measurement data; the protection action signal comprises a first protection action signal; the first protection action signal is used for indicating the high-voltage direct-current transmission system to restart;
the first generation module is used for generating a zero clearing signal according to the first protection action signal and the preset reset signal if the direct current transmission line protection system receives the preset reset signal input by a user and the protection action signal is the first protection action signal;
and the resetting module is used for resetting the direct current transmission line protection system according to the zero clearing signal.
In a third aspect, there is provided a computer device comprising a memory and a processor, the memory storing a computer program which, when executed by the processor, performs the method steps of any of the embodiments of the first aspect described above.
In a fourth aspect, a computer-readable storage medium is provided, on which a computer program is stored which, when executed by a processor, carries out the method steps in any of the embodiments of the first aspect described above.
The method, the device, the equipment and the storage medium for resetting the direct current transmission line protection system acquire electrical measurement data from the high-voltage direct current transmission system through the direct current transmission line protection system, and generate a protection action signal according to the electrical measurement data; if the direct current transmission line protection system receives a preset reset signal input by a user and the protection action signal is a first protection action signal, generating a zero clearing signal according to the first protection action signal and the preset reset signal; and resetting the direct current transmission line protection system according to the zero clearing signal. In the technical scheme provided by the embodiment of the application, compared with the traditional method for carrying out the resetting operation on the direct-current transmission line protection system by adopting an automatic resetting mode, the method has the advantages that the manual resetting function is added, the first protection action signal and the preset resetting signal input by a user are associated, and when the direct-current trigger pulse signal triggering the converter to work disappears, the manual resetting operation can be carried out on the direct-current transmission line protection system by adopting the manual resetting mode, so that the reliability of the direct-current transmission line protection system is improved.
Drawings
FIG. 1 is a block diagram of a computer device provided in an embodiment of the present application;
fig. 2 is a flowchart of a method for resetting a dc transmission line protection system according to an embodiment of the present application;
FIG. 3 is a flowchart of generating a protection action signal according to an embodiment of the present application;
FIG. 4 is a flowchart of generating a first protection action signal according to an embodiment of the present application;
fig. 5 is a flowchart for resetting a dc transmission line protection system according to a counter value provided in an embodiment of the present application;
fig. 6 is a flowchart of a method for resetting a dc transmission line protection system according to an embodiment of the present application;
fig. 7 is a block diagram of a resetting device of a dc transmission line protection system according to an embodiment of the present application.
Detailed Description
For the purpose of making the objects, technical solutions and advantages of the present application more apparent, the embodiments of the present application will be described in further detail below with reference to the accompanying drawings.
The method for resetting the direct current transmission line protection system can be applied to computer equipment, wherein the computer equipment can be a server or a terminal, the server can be one server or a server cluster formed by a plurality of servers, the embodiment of the application is not particularly limited to the method, and the terminal can be but not limited to various personal computers, notebook computers, smart phones, tablet computers and portable wearable equipment.
Taking the example of a computer device being a server, FIG. 1 illustrates a block diagram of a server, as shown in FIG. 1, which may include a processor and memory connected by a system bus. Wherein the processor of the server is configured to provide computing and control capabilities. The memory of the server includes nonvolatile storage medium and internal memory. The nonvolatile storage medium stores an operating system, a computer program, and a database. The internal memory provides an environment for the operation of the operating system and computer programs in the non-volatile storage media. The computer program when executed by the processor is used for realizing a resetting method of the direct current transmission line protection system.
It will be appreciated by those skilled in the art that the structure shown in fig. 1 is merely a block diagram of a portion of the structure associated with the present application and does not constitute a limitation of the server to which the present application is applied, and that alternatively the server may include more or less components than those shown, or may combine some components, or have a different arrangement of components.
The execution subject of the embodiment of the present application may be a computer device, or may be a dc transmission line protection system resetting device, and the following method embodiment is described with reference to the computer device as the execution subject.
In one embodiment, as shown in fig. 2, a flowchart of a method for resetting a dc transmission line protection system provided in an embodiment of the present application is shown, where the method may include the following steps:
220, acquiring electrical measurement data from a high-voltage direct-current transmission system through a direct-current transmission line protection system, and generating a protection action signal according to the electrical measurement data; the protection action signal comprises a first protection action signal; the first protection action signal is used for indicating the high-voltage direct-current transmission system to restart.
The electrical measurement data are used for representing the running state of the high-voltage direct-current transmission system, and the direct-current transmission line protection system can acquire the electrical measurement data through the corresponding input/output I/O system, can acquire the electrical measurement data of the high-voltage direct-current transmission system in real time, and can acquire the electrical measurement data according to preset interval duration. The electrical measurement data may be data such as dc voltage and dc current, or may be other types of electrical measurement data. After the acquired electrical measurement data meets the preset condition, that is, when it is determined that the hvdc transmission system fails, a protection action signal may be generated, and the protection action signal may include a first protection action signal, that is, the protection action signal qu=1. Because the protection outlet of the direct current transmission line protection system can be restarted, the generated first protection action signal can restart the high voltage direct current transmission system, so that the fault of the high voltage direct current transmission system disappears.
Step 240, if the dc transmission line protection system receives the preset reset signal input by the user and the protection action signal is the first protection action signal, generating a clear signal according to the first protection action signal and the preset reset signal.
The direct current transmission line protection system is additionally provided with a manual reset function, and after the direct current transmission line protection system receives a preset reset signal input by a user, the protection action signal at the moment is determined to be a first protection action signal, and a zero clearing signal is generated according to the first protection action signal and the preset reset signal. The preset reset signal may be generated by a user by triggering a manual reset button of the direct current transmission line protection system. When the protection action signal is the first protection action signal, the high-voltage direct-current transmission system can be restarted, and at the moment, the protection action signal generated by the direct-current transmission line protection system can be determined to be the first protection action signal.
And 260, resetting the direct current transmission line protection system according to the clear signal.
The protection logic of the protection outlet for restarting the direct current transmission line protection system can be realized by adopting a DISA integral counting module for counting, namely a DISA integral counter is adopted. After the direct current transmission line protection system generates a zero clearing signal, the current value of a protection action signal in the direct current transmission line protection system, the current value of the DISA integral counter and the like can be reset, so that the direct current transmission line protection system can normally exit the protection action when the next high voltage direct current transmission system fails, and the stable operation of the high voltage direct current transmission system is ensured.
In the embodiment, electric measurement data is obtained from a high-voltage direct-current transmission system through a direct-current transmission line protection system, and a protection action signal is generated according to the electric measurement data; if the direct current transmission line protection system receives a preset reset signal input by a user and the protection action signal is a first protection action signal, generating a zero clearing signal according to the first protection action signal and the preset reset signal; and resetting the direct current transmission line protection system according to the zero clearing signal. Compared with the traditional method for resetting the direct-current transmission line protection system by adopting an automatic resetting mode, the method has the advantages that the manual resetting function is added, the first protection action signal is associated with the preset resetting signal input by a user, and when the direct-current trigger pulse signal triggering the converter to work disappears, the manual resetting mode can be adopted for resetting the direct-current transmission line protection system, so that the reliability of the direct-current transmission line protection system is improved.
In one embodiment, another possible process of generating the clear signal further includes: and if the direct current transmission line protection system does not acquire the trigger pulse signal from the high-voltage direct current transmission system, generating a zero clearing signal.
The trigger pulse vanishing signal is pre-associated with a zero clearing signal of the direct current transmission line protection system, namely, the trigger pulse vanishing signal is used as an input of the zero clearing signal. And when the trigger pulse signal is not acquired from the high-voltage direct-current transmission system by the direct-current transmission line protection system, namely when the pulse trigger signal disappears, generating a zero clearing signal.
In the traditional method, a trigger pulse vanishing signal is associated with a protection freezing signal of a direct current transmission line protection system, and when the direct current transmission line protection system generates a first protection action signal, the high-voltage direct current transmission system is restarted. Because the acquired electrical measurement quantity still meets the preset condition in a short time, a counter in the direct current transmission line protection system is continuously accumulated, if a protection freezing signal is generated under the condition that the direct current transmission line protection system does not acquire a trigger pulse signal from the high-voltage direct current transmission system, a protection outlet of the direct current transmission line protection system can be always kept, thereby leading the direct current transmission line protection system to always generate an alarm signal, further leading the direct current transmission line protection system to reject the protection outlet after the next fault of the high-voltage direct current transmission system, leading to direct current monopole locking of the high-voltage direct current transmission system, and leading to difficulty in resetting due to the fact that the direct current transmission line protection system cannot be reset after the direct current monopole locking.
In this embodiment, by associating the trigger pulse vanishing signal with the clear signal of the dc power transmission line protection system, when the trigger pulse signal is not obtained, that is, when the clear signal is generated, the dc power transmission line protection system is reset, thereby improving the reliability of the dc power transmission line protection system and improving the stability and safety of the operation of the high-voltage dc power transmission system.
In one embodiment, the protection action signal further includes a second protection action signal, as shown in fig. 3, which shows a flowchart of a method for resetting a dc transmission line protection system provided in an embodiment of the present application, and specifically relates to a possible process of generating the protection action signal, where the method may include the following steps:
step 320, determining whether the electrical measurement data is abnormal electrical measurement data.
Step 340, if the electrical measurement data is abnormal electrical measurement data, generating a protection freeze signal according to the electrical measurement data.
Step 360, based on the protection freezing signal, freezing the current protection action signal of the direct current transmission line protection system, and determining the current protection action signal in the frozen state as the protection action signal; the current protection action signal is a first protection action signal or a second protection action signal.
The obtained electrical measurement data can be compared with the pre-stored normal electrical measurement data, so that whether the obtained electrical measurement data is abnormal electrical measurement data or not can be determined, and the pre-stored normal electrical measurement data can be obtained from a normally-running high-voltage direct-current power transmission system. When determining whether the acquired electrical measurement data is abnormal electrical measurement data, it may be determined whether the acquired electrical measurement data is consistent with normal electrical measurement data, or whether the difference between the electrical measurement data and the normal electrical measurement data is within a preset range, or whether the acquired electrical measurement data is abnormal electrical measurement data may be determined by other methods, which is not particularly limited in this embodiment.
When the electrical measurement data is abnormal electrical measurement data, a protection freezing signal is generated, the current protection action signal of the direct current transmission line protection system is frozen based on the protection freezing signal, the current protection action signal in the frozen state is determined as the protection action signal, and the DISA integral counter can be reset. Since the protection action signal of the dc power transmission line protection system may include two states, the protection action signal may further include a second protection action signal, where the second protection action signal corresponds to the first protection action signal, that is, the second protection action signal qu=0, so that the hvdc power transmission system is not restarted. Thus, the frozen current protection operation signal may be the first protection operation signal or the second protection operation signal.
In this embodiment, whether the electrical measurement data is abnormal electrical measurement data is determined; if the electrical measurement data is abnormal electrical measurement data, generating a protection freezing signal according to the electrical measurement data; based on the protection freezing signal, freezing the current protection action signal of the direct current transmission line protection system, and determining the current protection action signal in the frozen state as the protection action signal. After the protection freezing signal is generated, if the current protection action signal is a second protection action signal, the protection freezing signal is equivalent to the resetting operation of the protection system of the direct current transmission line; if the current protection action signal is the first protection action signal, and if a preset reset signal input by a user is received at the same time, the reset of the direct current transmission line protection system can be realized by generating a clear signal, so that the convenience of resetting the direct current transmission line protection system is improved.
In one embodiment, when the protection action signal is generated according to the electrical measurement data, if the electrical measurement data is not abnormal electrical measurement data, the first protection action signal is generated according to the current value of a counter in the direct current transmission line protection system.
Optionally, as shown in fig. 4, a flowchart of a method for resetting a dc transmission line protection system provided in an embodiment of the present application, specifically, a possible process of generating a first protection action signal may include the following steps:
step 420, determining whether the electrical measurement data meets a preset protection condition.
Step 440, if the preset protection condition is satisfied, controlling a counter in the direct current transmission line protection system to count up according to a preset accumulation rule.
Step 460, generating a first protection action signal when the counter accumulates to a first preset protection action delay fixed value.
In the case where the electrical measurement data is not abnormal electrical measurement data, it is necessary to determine whether the electrical measurement data satisfies a preset protection condition. The preset protection condition may be exceeding a preset electrical measurement value, for example, the preset protection condition may be a preset dc voltage value. And if the obtained direct current voltage exceeds a preset direct current voltage fixed value, determining that the electrical measurement data meets a preset protection condition. If the preset protection condition is met, the DISA integral counter in the direct current transmission line protection system is controlled to count in an accumulated mode according to a preset accumulation rule, wherein the preset accumulation rule can be set according to actual requirements, for example, 20 accumulation can be carried out every execution period.
When the counter accumulates to the first preset protection action delay fixed value, that is, the current value of the DISA integral counter reaches the first preset protection action delay fixed value after accumulation, the first protection action signal is generated, and the first preset protection action delay fixed value can also be set according to actual requirements, for example, the first preset protection action delay fixed value can be set to be 50ms. In this embodiment, the accumulated value of each execution cycle of the disk integral counter and the first preset protection action delay fixed value are not particularly limited.
In the embodiment, whether the electrical measurement data meets the preset protection condition is judged; if the preset protection condition is met, a counter in the direct current transmission line protection system is controlled to count in an accumulating mode according to a preset accumulating rule; and generating a first protection action signal when the counter is accumulated to a first preset protection action delay fixed value. The first protection action signal can be accurately generated through the accumulated value of the counter in the direct current transmission line protection system, so that a protection outlet can be more reliably carried out on the high-voltage direct current transmission system.
In one embodiment, as shown in fig. 5, which shows a flowchart of a method for resetting a dc transmission line protection system provided in the embodiment of the present application, specifically, a possible process for resetting a dc transmission line protection system according to a counter value may include the following steps:
and step 520, if the preset protection condition is not met, controlling a counter in the direct current transmission line protection system to perform the accumulation and reduction count according to a preset accumulation and reduction rule.
And step 540, resetting the direct current transmission line protection system when the counter is accumulated and reduced to a second preset protection action delay fixed value.
Under the condition that the electrical measurement data does not meet the preset protection condition, a counter in the direct current transmission line protection system is controlled to count down according to a preset accumulation and subtraction rule, wherein the preset accumulation and subtraction rule can be set according to actual requirements, for example, 1 accumulation and subtraction can be performed every execution period. And when the counter is reduced to a second preset protection action delay fixed value, resetting the direct current transmission line protection system, namely resetting the protection action signal of the direct current transmission line protection system and the DISA integral counter. The second preset protection action delay fixed value can be the same as the first preset protection action delay fixed value, and can also be set according to actual requirements. In this embodiment, the cumulative value of each period of execution of the disk integral counter and the second preset protection action delay fixed value are not particularly limited.
In this embodiment, if the preset protection condition is not satisfied, a counter in the dc transmission line protection system is controlled to perform the count-up and count-down according to a preset count-up and count-down rule; and resetting the direct current transmission line protection system when the counter is accumulated and reduced to a second preset protection action delay fixed value. The resetting operation of the direct current transmission line protection system can be more reliably realized through the accumulated and subtracted value of the counter in the direct current transmission line protection system.
In one embodiment, as shown in fig. 6, a flowchart of a method for resetting a dc transmission line protection system provided in an embodiment of the present application is shown, where the method may include the following steps:
step 601, acquiring electrical measurement data.
Step 602, judging whether a clear signal is received.
And 603, resetting the direct current transmission line protection system according to the clear signal if the clear signal is received.
Step 604, if the clear signal is not received, it is determined whether a protection freeze signal is received.
Step 605, if the protection freezing signal is received, freezing the current protection action signal of the direct current transmission line protection system, and determining the current protection action signal in the frozen state as the protection action signal.
Step 606, if the protection freeze signal is not received, it is determined whether the electrical measurement data meets a preset protection condition.
And 607, if the preset protection condition is met, controlling a counter in the direct current transmission line protection system to count up according to a preset accumulation rule.
Step 608, determining whether the counter reaches a preset protection action delay fixed value.
Step 609, generating a first protection action signal when the counter accumulates to a first preset protection action delay fixed value.
And 610, if the preset protection condition is not met, controlling a counter in the direct current transmission line protection system to perform the accumulation and reduction count according to a preset accumulation and reduction rule.
And 611, resetting the direct current transmission line protection system when the counter is accumulated and reduced to a second preset protection action delay fixed value.
The implementation principle and technical effects of each step in the method for resetting the dc transmission line protection system provided in this embodiment are similar to those in the foregoing embodiments of the method for resetting the dc transmission line protection system, and are not described herein again. The implementation manner of each step in the embodiment of fig. 6 is merely an example, and the implementation manner is not limited, and the order of each step may be adjusted in practical application, so long as the purpose of each step can be achieved.
In the technical scheme provided by the embodiment of the application, due to the fact that the manual reset function is added, the first protection action signal is associated with the preset reset signal input by the user, when the direct-current trigger pulse signal triggering the converter to work disappears, the reset operation can be carried out on the direct-current transmission line protection system in a manual reset mode, and therefore the reliability of the direct-current transmission line protection system is improved.
It should be understood that, although the steps in the flowcharts of fig. 2-6 are shown in order as indicated by the arrows, these steps are not necessarily performed in order as indicated by the arrows. The steps are not strictly limited to the order of execution unless explicitly recited herein, and the steps may be executed in other orders. Moreover, at least some of the steps in fig. 2-6 may include multiple steps or stages that are not necessarily performed at the same time, but may be performed at different times, nor does the order in which the steps or stages are performed necessarily performed in sequence, but may be performed alternately or alternately with at least a portion of the steps or stages in other steps or other steps.
Referring to fig. 7, a block diagram of a dc transmission line protection system resetting device 700 according to an embodiment of the present application is shown. As shown in fig. 7, the dc transmission line protection system resetting device 700 may include: an acquisition module 702, a first generation module 704, and a reset module 706, wherein:
the acquisition module 702 is configured to acquire electrical measurement data from the high-voltage direct-current power transmission system through the direct-current power transmission line protection system, and generate a protection action signal according to the electrical measurement data; the protection action signal comprises a first protection action signal; the first protection action signal is used for indicating the high-voltage direct-current transmission system to restart.
The first generating module 704 is configured to generate a clear signal according to the first protection action signal and the preset reset signal if the dc transmission line protection system receives the preset reset signal input by the user and the protection action signal is the first protection action signal.
And the resetting module 706 is configured to reset the dc transmission line protection system according to the clear signal.
In one embodiment, the dc transmission line protection system resetting device 700 further includes a second generating module 708, where the second generating module 708 is configured to generate a clear signal if the dc transmission line protection system does not acquire the trigger pulse signal from the hvdc transmission system.
In one embodiment, the acquiring module 702 includes a judging unit, a first generating unit, and a determining unit, where the judging unit is configured to judge whether the electrical measurement data is abnormal electrical measurement data; the first generation unit is used for generating a protection freezing signal according to the electrical measurement data if the electrical measurement data are abnormal electrical measurement data; the determining unit is used for freezing the current protection action signal of the direct current transmission line protection system based on the protection freezing signal, and determining the current protection action signal in the frozen state as the protection action signal; the current protection action signal is a first protection action signal or a second protection action signal.
In one embodiment, the obtaining module 702 further includes a second generating unit, where the second generating unit is configured to generate the first protection action signal according to a current value of a counter in the dc transmission line protection system if the electrical measurement data is not abnormal electrical measurement data.
In one embodiment, the second generating unit is specifically configured to determine whether the electrical measurement data meets a preset protection condition; if the preset protection condition is met, a counter in the direct current transmission line protection system is controlled to count in an accumulating mode according to a preset accumulating rule; and generating a first protection action signal when the counter is accumulated to a first preset protection action delay fixed value.
In one embodiment, the second generating unit is further configured to control a counter in the dc transmission line protection system to perform a cumulative count according to a preset cumulative count rule if the preset protection condition is not satisfied; and resetting the direct current transmission line protection system when the counter is accumulated and reduced to a second preset protection action delay fixed value.
In one embodiment, the resetting module 706 includes a resetting unit, where the resetting unit is configured to reset the protection action signal of the dc transmission line protection system and the current value of the counter according to the clear signal.
The specific limitation of the dc transmission line protection system resetting device may be referred to the limitation of the dc transmission line protection system resetting method hereinabove, and will not be described herein. All or part of each module in the resetting device of the direct current transmission line protection system can be realized by software, hardware and a combination thereof. The above modules may be embedded in hardware or may be independent of a processor in the computer device, or may be stored in software in a memory in the computer device, so that the processor may invoke and perform the operations of the above modules.
In one embodiment of the present application, a computer device is provided, the computer device comprising a memory and a processor, the memory having stored therein a computer program, the processor, when executing the computer program, performing the steps of:
acquiring electrical measurement data from a high-voltage direct-current transmission system through a direct-current transmission line protection system, and generating a protection action signal according to the electrical measurement data; the protection action signal comprises a first protection action signal; the first protection action signal is used for indicating the high-voltage direct-current transmission system to restart; if the direct current transmission line protection system receives a preset reset signal input by a user and the protection action signal is a first protection action signal, generating a zero clearing signal according to the first protection action signal and the preset reset signal; and resetting the direct current transmission line protection system according to the zero clearing signal.
In one embodiment of the present application, the processor when executing the computer program further performs the steps of:
and if the direct current transmission line protection system does not acquire the trigger pulse signal from the high-voltage direct current transmission system, generating a zero clearing signal.
In one embodiment of the present application, the protection action signal further comprises a second protection action signal;
the processor when executing the computer program also implements the steps of:
judging whether the electrical measurement data is abnormal electrical measurement data or not; if the electrical measurement data is abnormal electrical measurement data, generating a protection freezing signal according to the electrical measurement data; based on the protection freezing signal, freezing the current protection action signal of the direct current transmission line protection system, and determining the current protection action signal in a frozen state as a protection action signal; the current protection action signal is a first protection action signal or a second protection action signal.
In one embodiment of the present application, the processor when executing the computer program further performs the steps of:
and if the electrical measurement data is not abnormal electrical measurement data, generating a first protection action signal according to the current value of a counter in the direct current transmission line protection system.
In one embodiment of the present application, the processor when executing the computer program further performs the steps of:
judging whether the electrical measurement data meet preset protection conditions or not; if the preset protection condition is met, a counter in the direct current transmission line protection system is controlled to count in an accumulating mode according to a preset accumulating rule; and generating a first protection action signal when the counter is accumulated to a first preset protection action delay fixed value.
In one embodiment of the present application, the processor when executing the computer program further performs the steps of:
if the preset protection condition is not met, controlling a counter in the direct current transmission line protection system to count up and down according to a preset accumulation and reduction rule; and resetting the direct current transmission line protection system when the counter is accumulated and reduced to a second preset protection action delay fixed value.
In one embodiment of the present application, the processor when executing the computer program further performs the steps of:
and resetting the protection action signal of the direct current transmission line protection system and the current value of the counter according to the zero clearing signal.
The computer device provided in the embodiments of the present application has similar implementation principles and technical effects to those of the above method embodiments, and will not be described herein.
In one embodiment of the present application, a computer readable storage medium is provided having a computer program stored thereon, which when executed by a processor, performs the steps of:
acquiring electrical measurement data from a high-voltage direct-current transmission system through a direct-current transmission line protection system, and generating a protection action signal according to the electrical measurement data; the protection action signal comprises a first protection action signal; the first protection action signal is used for indicating the high-voltage direct-current transmission system to restart; if the direct current transmission line protection system receives a preset reset signal input by a user and the protection action signal is a first protection action signal, generating a zero clearing signal according to the first protection action signal and the preset reset signal; and resetting the direct current transmission line protection system according to the zero clearing signal.
In one embodiment of the present application, the computer program when executed by the processor further performs the steps of:
and if the direct current transmission line protection system does not acquire the trigger pulse signal from the high-voltage direct current transmission system, generating a zero clearing signal.
In one embodiment of the present application, the protection action signal further comprises a second protection action signal;
the computer program when executed by the processor also performs the steps of:
judging whether the electrical measurement data is abnormal electrical measurement data or not; if the electrical measurement data is abnormal electrical measurement data, generating a protection freezing signal according to the electrical measurement data; based on the protection freezing signal, freezing the current protection action signal of the direct current transmission line protection system, and determining the current protection action signal in a frozen state as a protection action signal; the current protection action signal is a first protection action signal or a second protection action signal.
In one embodiment of the present application, the computer program when executed by the processor further performs the steps of:
and if the electrical measurement data is not abnormal electrical measurement data, generating a first protection action signal according to the current value of a counter in the direct current transmission line protection system.
In one embodiment of the present application, the computer program when executed by the processor further performs the steps of:
judging whether the electrical measurement data meet preset protection conditions or not; if the preset protection condition is met, a counter in the direct current transmission line protection system is controlled to count in an accumulating mode according to a preset accumulating rule; and generating a first protection action signal when the counter is accumulated to a first preset protection action delay fixed value.
In one embodiment of the present application, the computer program when executed by the processor further performs the steps of:
if the preset protection condition is not met, controlling a counter in the direct current transmission line protection system to count up and down according to a preset accumulation and reduction rule; and resetting the direct current transmission line protection system when the counter is accumulated and reduced to a second preset protection action delay fixed value.
In one embodiment of the present application, the computer program when executed by the processor further performs the steps of:
and resetting the protection action signal of the direct current transmission line protection system and the current value of the counter according to the zero clearing signal.
The computer readable storage medium provided in this embodiment has similar principles and technical effects to those of the above method embodiment, and will not be described herein.
Those skilled in the art will appreciate that implementing all or part of the above described methods may be accomplished by way of a computer program stored on a non-transitory computer readable storage medium, which when executed, may comprise the steps of the embodiments of the methods described above. Any reference to memory, storage, database, or other medium used in the various embodiments provided herein may include non-volatile and/or volatile memory. The nonvolatile memory can include Read Only Memory (ROM), programmable ROM (PROM), electrically Programmable ROM (EPROM), electrically Erasable Programmable ROM (EEPROM), or flash memory. Volatile memory can include Random Access Memory (RAM) or external cache memory. By way of illustration and not limitation, RAM is available in a variety of forms such as Static RAM (SRAM), dynamic RAM (DRAM), synchronous DRAM (SDRAM), double Data Rate SDRAM (DDRSDRAM), enhanced SDRAM (ESDRAM), synchronous Link DRAM (SLDRAM), memory bus direct RAM (RDRAM), direct memory bus dynamic RAM (DRDRAM), and memory bus dynamic RAM (RDRAM), among others.
The technical features of the above embodiments may be arbitrarily combined, and all possible combinations of the technical features in the above embodiments are not described for brevity of description, however, as long as there is no contradiction between the combinations of the technical features, they should be considered as the scope of the description.
The foregoing examples represent only a few embodiments of the present application, which are described in more detail and are not thereby to be construed as limiting the scope of the claims. It should be noted that it would be apparent to those skilled in the art that various modifications and improvements could be made without departing from the spirit of the present application, which would be within the scope of the present application. Accordingly, the scope of protection of the present application is to be determined by the claims appended hereto.

Claims (10)

1. A method for resetting a protection system for a direct current transmission line, the method comprising:
acquiring electrical measurement data from a high-voltage direct-current transmission system through the direct-current transmission line protection system, and judging whether the electrical measurement data are abnormal electrical measurement data or not; if the electrical measurement data are abnormal electrical measurement data, generating a protection freezing signal according to the electrical measurement data; based on the protection freezing signal, freezing the current protection action signal of the direct current transmission line protection system, and determining the current protection action signal in a frozen state as a protection action signal; the current protection action signal comprises a first protection action signal and a second protection action signal; the first protection action signal is used for indicating the high-voltage direct-current transmission system to restart;
if the direct current transmission line protection system receives a preset reset signal input by a user and the protection action signal is the first protection action signal, generating a zero clearing signal according to the first protection action signal and the preset reset signal;
and resetting the direct current transmission line protection system according to the zero clearing signal.
2. The method according to claim 1, wherein the method further comprises:
and if the direct current transmission line protection system does not acquire the trigger pulse signal from the high-voltage direct current transmission system, generating the zero clearing signal.
3. The method of claim 1, wherein generating a protection action signal from the electrical measurement data further comprises:
and if the electrical measurement data are not abnormal electrical measurement data, generating the first protection action signal according to the current value of a counter in the direct current transmission line protection system.
4. A method according to claim 3, wherein generating the first protection action signal according to the current value of a counter in the dc transmission line protection system comprises:
judging whether the electrical measurement data meet preset protection conditions or not;
if the preset protection condition is met, a counter in the direct current transmission line protection system is controlled to count in an accumulating mode according to a preset accumulating rule;
and generating the first protection action signal when the counter is accumulated to a first preset protection action delay fixed value.
5. The method according to claim 4, wherein the method further comprises:
if the preset protection condition is not met, controlling a counter in the direct current transmission line protection system to count up and down according to a preset accumulation and reduction rule;
and resetting the direct current transmission line protection system when the counter is accumulated and reduced to a second preset protection action delay fixed value.
6. The method of claim 1, wherein resetting the dc transmission line protection system based on the clear signal comprises:
and resetting the protection action signal of the direct current transmission line protection system and the current value of the counter according to the zero clearing signal.
7. A dc transmission line protection system resetting device, the device comprising:
the acquisition module is used for acquiring electrical measurement data from the high-voltage direct-current transmission system through the direct-current transmission line protection system and judging whether the electrical measurement data are abnormal electrical measurement data or not; if the electrical measurement data are abnormal electrical measurement data, generating a protection freezing signal according to the electrical measurement data; based on the protection freezing signal, freezing the current protection action signal of the direct current transmission line protection system, and determining the current protection action signal in a frozen state as a protection action signal; the current protection action signal comprises a first protection action signal and a second protection action signal; the first protection action signal is used for indicating the high-voltage direct-current transmission system to restart;
the first generation module is used for generating a zero clearing signal according to the first protection action signal and the preset reset signal if the direct current transmission line protection system receives the preset reset signal input by a user and the protection action signal is the first protection action signal;
and the resetting module is used for resetting the direct current transmission line protection system according to the zero clearing signal.
8. The apparatus of claim 7, wherein the apparatus further comprises:
and the second generation module is used for generating the zero clearing signal if the direct current transmission line protection system does not acquire the trigger pulse signal from the high-voltage direct current transmission system.
9. A computer device comprising a memory and a processor, the memory storing a computer program which, when executed by the processor, implements the steps of the method of any of claims 1 to 6.
10. A computer-readable storage medium, on which a computer program is stored which, when being executed by a processor, carries out the steps of the method according to any one of claims 1 to 6.
CN202111102028.2A 2021-09-18 2021-09-18 Method, device, equipment and storage medium for resetting direct current transmission line protection system Active CN113824096B (en)

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Publication number Priority date Publication date Assignee Title
CN104269840A (en) * 2014-10-20 2015-01-07 国家电网公司 Restarting method for faults of direct current transmission line of extra-high voltage direct current engineering
CN104767196A (en) * 2015-04-02 2015-07-08 中国南方电网有限责任公司超高压输电公司检修试验中心 Automatic in service and out of service method for restarting monitoring function of direct current transmission line fault
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CN111934289A (en) * 2020-07-01 2020-11-13 南方电网科学研究院有限责任公司 Control method, device, equipment and medium for inverter side valve short-circuit protection action
CN113241741A (en) * 2021-05-14 2021-08-10 广东电网有限责任公司电力调度控制中心 Direct-current line protection method, device and equipment for preventing false start of alternating-current fault

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN104269840A (en) * 2014-10-20 2015-01-07 国家电网公司 Restarting method for faults of direct current transmission line of extra-high voltage direct current engineering
CN104767196A (en) * 2015-04-02 2015-07-08 中国南方电网有限责任公司超高压输电公司检修试验中心 Automatic in service and out of service method for restarting monitoring function of direct current transmission line fault
CN208835837U (en) * 2018-07-20 2019-05-07 广东电网有限责任公司 Long-range involution equipment and system
CN111934289A (en) * 2020-07-01 2020-11-13 南方电网科学研究院有限责任公司 Control method, device, equipment and medium for inverter side valve short-circuit protection action
CN113241741A (en) * 2021-05-14 2021-08-10 广东电网有限责任公司电力调度控制中心 Direct-current line protection method, device and equipment for preventing false start of alternating-current fault

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