CN116780462A - Current abnormality protection method and device for power supply of nuclear power equipment and power supply system - Google Patents
Current abnormality protection method and device for power supply of nuclear power equipment and power supply system Download PDFInfo
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- CN116780462A CN116780462A CN202310464452.4A CN202310464452A CN116780462A CN 116780462 A CN116780462 A CN 116780462A CN 202310464452 A CN202310464452 A CN 202310464452A CN 116780462 A CN116780462 A CN 116780462A
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- 238000000034 method Methods 0.000 title claims abstract description 37
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- 230000015654 memory Effects 0.000 claims description 12
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Classifications
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02H—EMERGENCY PROTECTIVE CIRCUIT ARRANGEMENTS
- H02H3/00—Emergency protective circuit arrangements for automatic disconnection directly responsive to an undesired change from normal electric working condition with or without subsequent reconnection ; integrated protection
- H02H3/08—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 responsive to excess current
- H02H3/093—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 responsive to excess current with timing means
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02H—EMERGENCY PROTECTIVE CIRCUIT ARRANGEMENTS
- H02H3/00—Emergency protective circuit arrangements for automatic disconnection directly responsive to an undesired change from normal electric working condition with or without subsequent reconnection ; integrated protection
- H02H3/02—Details
- H02H3/05—Details with means for increasing reliability, e.g. redundancy arrangements
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02J—CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
- H02J9/00—Circuit arrangements for emergency or stand-by power supply, e.g. for emergency lighting
- H02J9/04—Circuit arrangements for emergency or stand-by power supply, e.g. for emergency lighting in which the distribution system is disconnected from the normal source and connected to a standby source
- H02J9/06—Circuit arrangements for emergency or stand-by power supply, e.g. for emergency lighting in which the distribution system is disconnected from the normal source and connected to a standby source with automatic change-over, e.g. UPS systems
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Abstract
The application provides a current abnormality protection method and device for a power supply of nuclear power equipment and a power supply system, wherein the current abnormality protection method for the power supply of the nuclear power equipment is applied to the technical field of circuits and comprises the following steps: acquiring electrical parameters of a power supply of the nuclear power equipment, wherein the electrical parameters comprise output current; when the output current exceeds the preset current, determining the current abnormality type of the power supply according to the electrical parameter, and generating an abnormality identification corresponding to the current abnormality type; acquiring a timing duration pre-configured for the current abnormality type, and executing a protection strategy corresponding to the current abnormality type when the duration of the abnormality identification reaches the timing duration. The application can effectively ensure the power supply reliability when the power supply supplies power to the nuclear power equipment.
Description
Technical Field
The application belongs to the technical field of circuits, and particularly relates to a current abnormality protection method and device for a power supply of nuclear power equipment and a power supply system.
Background
At present, when power is supplied to the nuclear power equipment through the power supply, in order to ensure the circuit safety and the power supply reliability of the power supply, various electrical parameters in the power supply are generally monitored, and when the power supply is found to be abnormal, a corresponding protection strategy is executed.
For example, in the prior art, when an excessive output current of the power supply is detected, a protection policy is executed to avoid damage to components in the power supply circuit. However, the inventors of the present application have found that the cause of the excessive current may be different in different situations, and if this is not distinguished, the execution of the subsequent protection strategy may adversely affect the power supply reliability when the power supply supplies power to the nuclear power plant.
Disclosure of Invention
The application aims to provide a current abnormality protection method and device for a power supply of nuclear power equipment and a power supply system, so as to solve the problem that the execution of a protection strategy in the prior art may affect the power supply reliability.
In order to achieve the above purpose, the technical scheme adopted by the application is to provide a current abnormality protection method for a power supply of a nuclear power equipment, wherein the current abnormality protection method for the power supply of the nuclear power equipment comprises the following steps:
acquiring electrical parameters of a power supply of nuclear power equipment, wherein the electrical parameters comprise output current;
when the output current exceeds a preset current, determining a current abnormality type of the power supply according to the electrical parameter, and generating an abnormality identification corresponding to the current abnormality type;
and acquiring a timing duration pre-configured for the current abnormality type, and executing a protection strategy corresponding to the current abnormality type when the duration of the abnormality identification reaches the timing duration.
In one possible implementation, the electrical parameter further includes an output voltage, and the current anomaly type includes a short circuit anomaly and a current surge anomaly; the determining the current abnormality type of the power supply according to the electrical parameter comprises the following steps:
if the output voltage of the power supply circuit is smaller than a first preset voltage, the current abnormality type of the power supply is short circuit abnormality;
if the output voltage of the power supply circuit is larger than a second preset voltage, the current abnormality type of the power supply is current impact abnormality;
the second preset voltage is not smaller than the first preset voltage, and the timing time length corresponding to the short circuit abnormality is longer than the timing time length corresponding to the current impact abnormality.
In one possible implementation, the generating an anomaly identification corresponding to the current anomaly type includes:
generating an abnormality identification corresponding to the current abnormality type when the duration of the current abnormality type of the power supply exceeds a preset detection duration; or generating an abnormality identification corresponding to the current abnormality type when determining the current abnormality type of the power supply.
In one possible implementation manner, if the current anomaly type is a short-circuit anomaly, the current anomaly protection method further includes:
if the disappearance time of the short circuit abnormality in the power supply reaches a preset exit time, the abnormality identification is withdrawn; wherein the exit duration is less than the timing duration.
In one possible implementation, the exit duration texit_set satisfies:
Tdb<Texit_set<Tenter_set；
wherein tenter_set is the timing duration, tdb is the duration of the output current of the power supply within a (-IscSet, iscSet) range, iscSet is the preset current.
In one possible implementation manner, the power supply is connected with a plurality of nuclear power equipment, and a first switch is arranged between each nuclear power equipment and the power supply; the current abnormality protection method further includes:
determining the timing duration according to the short-circuit protection time of the first switch;
the short-circuit protection time of the first switch refers to the time required for switching the first switch from a closed state to an open state when a short circuit occurs on a line where the first switch is located;
the timing duration is not less than the maximum protection time, and the maximum protection time refers to the maximum value of the short-circuit protection time of all the first switches.
In one possible implementation manner, the current anomaly protection method further includes:
if the current abnormality type is short-circuit abnormality and the timing duration is longer than a preset undervoltage detection duration, adjusting an undervoltage detection criterion corresponding to the power supply or not responding to an undervoltage protection strategy corresponding to the power supply;
the undervoltage detection time is a detection time for judging the undervoltage of the power supply, and the undervoltage detection criterion is a criterion adopted for judging the undervoltage of the power supply.
In one possible implementation, the power supply includes a bypass and an inverter circuit connected in parallel;
if the current abnormality type of the power supply is current surge abnormality and the current power supply line is the inverter circuit, the corresponding protection strategy is: switching the current power supply line to a bypass;
if the current abnormality type of the power supply is short-circuit abnormality, the corresponding protection strategy is to turn off the power supply.
The application also provides a current abnormality protection device of the power supply of the nuclear power equipment, which comprises a memory, a processor and a computer program stored in the memory and capable of running on the processor, wherein the steps of the current abnormality protection method of the power supply of the nuclear power equipment are realized when the processor executes the computer program.
In still another aspect of the present application, there is also provided a power supply system including:
the current abnormality protection device of the power supply of the nuclear power equipment is described above.
The method and the device for protecting the abnormal current of the power supply of the nuclear power equipment, provided by the application, have the beneficial effects that:
the embodiment of the application distinguishes the abnormal situation of overlarge current in the power supply and provides a protection scheme aiming at different current abnormal types. Namely, the electric parameters are sampled and the current abnormality type is primarily identified, after the current abnormality type is successfully identified, the corresponding protection strategy is not executed, but the corresponding abnormality identification is generated, and after the duration of the abnormality identification reaches the timing duration, the circuit protection is performed. The embodiment of the application configures corresponding timing time length for different current abnormality types in advance, so that a specific protection strategy can be adopted for specific current abnormality types, and the influence of the uniform protection strategy on the power supply reliability when power is supplied to the nuclear power equipment is avoided.
For example, in one particular scenario, a nuclear power plant power supply typically powers multiple nuclear power plants (i.e., loads), and a switch is typically provided between the power supply and each load. On the basis, when the power supply supplies power to the nuclear power equipment, the sudden increase of the load generally causes large current impact on the power supply, and certain protection action needs to be quickly taken on the power supply. When the power supply supplies power to the nuclear power equipment, large current is often generated in the power supply due to short circuit of one or more load branches, and at the moment, if an abnormal protection strategy is executed quickly as same as current impact abnormality, the whole power supply can be powered off, so that other loads except for short circuit loads can be powered off, and the power supply reliability of the power supply can be reduced. Therefore, according to the scheme of the embodiment of the application, more timing time can be configured for the short circuit abnormality, namely, the protection strategy is executed when the short circuit abnormality occurs for more time, so that enough time is provided for the automatic disconnection of the switch between the short circuit load and the power supply. On the basis, the scheme of the embodiment of the application is analyzed, if the switch between the short-circuit load and the power supply circuit is disconnected after the short-circuit is abnormal, the corresponding abnormal mark is not continuous, and the corresponding protection strategy is not needed to be continuously executed, so that all loads are prevented from being powered off due to the short circuit of one or more loads, the power supply reliability of the power supply source for supplying power to the nuclear power equipment is effectively ensured, a maintainer can determine a load branch needing to be overhauled according to the disconnected switch during overhauling, and the overhauling of the maintainer is facilitated.
Drawings
In order to more clearly illustrate the technical solutions of the embodiments of the present application, the drawings that are needed in the embodiments or the description of the prior art will be briefly introduced below, and it is obvious that the drawings in the following description are only some embodiments of the present application, and that other drawings can be obtained according to these drawings without inventive effort for a person skilled in the art.
FIG. 1 is a schematic flow chart of a method for protecting abnormal current of a power supply of a nuclear power plant according to an embodiment of the present application;
fig. 2 is a schematic diagram of a power supply scenario of a power supply according to an embodiment of the present application;
FIG. 3 is a schematic diagram of waveforms of output currents of a power supply according to an embodiment of the present application;
fig. 4 is a schematic structural diagram of a current abnormality protection device for a power supply of a nuclear power device according to an embodiment of the present application.
Detailed Description
In order to make the technical problems, technical schemes and beneficial effects to be solved more clear, the application is further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are for purposes of illustration only and are not intended to limit the scope of the application.
The application will be described in further detail with reference to the drawings and the detailed description.
Referring to fig. 1, fig. 1 is a flow chart of a current abnormality protection method for a power supply of a nuclear power device according to an embodiment of the present application, where the current abnormality protection method for the power supply of the nuclear power device includes:
s101: obtaining electrical parameters of a power supply of the nuclear power equipment, wherein the electrical parameters comprise output current.
In this embodiment, the electrical parameter may be obtained, and whether the power supply has a current abnormality may be determined according to the output current in the electrical parameter.
S102: when the output current exceeds the preset current, determining the current abnormality type of the power supply according to the electric parameter, and generating an abnormality identification corresponding to the current abnormality type.
In this embodiment, when the output current of the power supply is detected to be too large (that is, when the output current of the power supply is detected to be greater than a preset current), it is determined that the power supply has a current abnormality, and on this basis, the type of circuit abnormality of the power supply can be primarily identified through the acquired electrical parameters.
S103: acquiring a timing duration pre-configured for the current abnormality type, and executing a protection strategy corresponding to the current abnormality type when the duration of the abnormality identification reaches the timing duration.
In this embodiment, different timing durations may be configured for different current anomaly types in advance, and on this basis, if the anomaly identification of the power supply continues all the time and the duration reaches the timing duration corresponding to the current anomaly type, a protection policy corresponding to the current anomaly type may be specified.
From the above description, the embodiment of the application distinguishes the abnormal situation of excessive current in the power supply and provides a protection scheme aiming at different current abnormal types. Namely, the electric parameters are sampled and the current abnormality type is primarily identified, after the current abnormality type is successfully identified, the corresponding protection strategy is not executed, but the corresponding abnormality identification is generated, and after the duration of the abnormality identification reaches the timing duration, the circuit protection is performed. The embodiment of the application configures corresponding timing time length for different current abnormality types in advance, so that a specific protection strategy can be adopted for specific current abnormality types, and the influence of the uniform protection strategy on the power supply reliability when power is supplied to the nuclear power equipment is avoided.
For example, referring to fig. 2, fig. 2 is a power supply scenario of a power supply provided by an embodiment of the present application, and the load in fig. 2 refers to a nuclear power device. As shown in the scenario of fig. 2, the power supply supplies power to a plurality of loads, and a first switch k1 is disposed between each load and the power supply. On the basis, when the power supply supplies power to the nuclear power equipment, the sudden increase of the load generally causes large current impact on the power supply, and certain protection action needs to be quickly taken on the power supply. When the power supply supplies power to the nuclear power equipment, a large current is often generated in the power supply due to the short circuit of one or a plurality of load branches. For example, if the load 2 is shorted, a large current is generated, so that the power supply detects the short circuit, and if the abnormal protection strategy is executed quickly as the current surge abnormality, the whole power supply may be powered off, so that other loads except the load 2 may be powered off, and the power supply reliability of the power supply may be reduced. Therefore, according to the scheme of the embodiment of the application, more timing time can be configured for the short circuit abnormality, namely, the protection strategy is executed when the short circuit abnormality occurs for more time, so that enough time is provided for the automatic disconnection of the switch k1 between the short circuit load and the power supply. On the basis, the scheme of the embodiment of the application is analyzed, if the switch between the short-circuit load and the power supply circuit is disconnected after the short-circuit is abnormal, the corresponding abnormal mark is not continuous, and the corresponding protection strategy is not needed to be continuously executed, so that all loads are prevented from being powered off due to the short circuit of one or more loads, the power supply reliability of the power supply source for supplying power to the nuclear power equipment is effectively ensured, a maintainer can determine a load branch needing to be overhauled according to the disconnected switch during overhauling, and the overhauling of the maintainer is facilitated.
In one possible implementation, the electrical parameters further include output voltage, and the current anomaly type includes a short circuit anomaly and a current surge anomaly. Determining the current abnormality type of the power supply according to the electrical parameter, including:
if the output voltage of the power supply circuit is smaller than the first preset voltage, the current abnormality type of the power supply is short circuit abnormality.
If the output voltage of the power supply circuit is larger than the second preset voltage, the current abnormality type of the power supply is current surge abnormality.
The second preset voltage is not smaller than the first preset voltage, and the timing time length corresponding to the short circuit abnormality is longer than the timing time length corresponding to the current impact abnormality.
That is, when the current anomaly type of the power supply is a short-circuit anomaly, the output current of the power supply circuit is greater than the preset current, and the output voltage of the power supply circuit is less than the first preset voltage. When the current abnormality type of the power supply is current surge abnormality, the output current of the power supply circuit is larger than a preset current, and the output voltage of the power supply circuit is larger than a second preset voltage.
In this embodiment, the electrical parameter further includes an active output power of the power supply, and on this basis, in order to improve accuracy in determining the current abnormality type, the current abnormality type of the power supply may be determined based on the output current, the output voltage, and the active output power of the power supply.
The abnormality type of the power supply is determined based on the output current, the output voltage and the active output power of the power supply, and can be described as follows:
if the output current of the power supply exceeds the preset current, the output voltage of the power supply is smaller than the first preset voltage, and the active output power of the power supply is smaller than the first preset power, determining that the current abnormality type of the power supply is short-circuit abnormality.
If the output current of the power supply exceeds the preset current, the output voltage of the power supply is larger than the second preset voltage, and the active output power of the power supply is larger than the second preset power, determining that the current abnormality type of the power supply is current surge abnormality.
Wherein the second preset power is not less than the first preset power.
In one possible implementation, generating an anomaly identification corresponding to a current anomaly type includes:
and generating an abnormality identification corresponding to the current abnormality type when the duration of the current abnormality type of the power supply exceeds a preset detection duration. Alternatively, an abnormality identification corresponding to the current abnormality type is generated when the current abnormality type of the power supply source is determined.
In this embodiment, when the duration of the current anomaly type of the power supply exceeds a preset detection duration, an anomaly identifier corresponding to the current anomaly type is generated, where the anomaly identifier is used to indicate that a short circuit anomaly has occurred in the power supply, and the foregoing time duration is equal to a delay time, that is, after it is determined that the short circuit anomaly exists in the power supply, the delay time duration executes a corresponding protection policy. The method can be effectively applied to the accurate detection and effective protection of short circuit abnormality in alternating current scenes, and ensures the power supply reliability.
In this embodiment, an anomaly identifier corresponding to the current anomaly type may be generated when the current anomaly type of the power supply is determined, where the anomaly identifier is used to indicate that a short circuit anomaly occurs in the power supply, and on this basis, if the duration of the anomaly identifier can reach the foregoing time duration, a corresponding protection policy may be executed. The method can be effectively applied to the accurate detection and effective protection of short circuit abnormality in a direct current scene, and ensures the power supply reliability. The method is not suitable for an alternating current scene, because the electrical parameters of the power supply are periodically changed in the alternating current scene, if an abnormal mark is generated when the current abnormal type of the power supply is determined, erroneous judgment is easily caused by the periodic change of the electrical parameters, and then a function module using the abnormal mark subsequently is in error.
In one possible implementation manner, if the current anomaly type is a short-circuit anomaly, the current anomaly protection method further includes:
and if the disappearance time of the short circuit abnormality in the power supply reaches the preset exit time, the abnormality identification is withdrawn. Wherein the exit duration is less than the timing duration.
In this embodiment, if the short-circuit abnormality in the power supply disappears and the disappearance time of the short-circuit abnormality reaches the preset exit duration during the timing of the timing duration, the abnormality identification may be revoked. On the basis, the corresponding protection strategy is not executed subsequently, so that the influence on the power supply reliability of the whole power supply is avoided.
For this, referring to fig. 2, according to the current anomaly protection method provided by the embodiment of the present application, if the load 2 is short-circuited, the power supply detects the short circuit and executes the corresponding protection policy after the timing period, if after detecting the short circuit anomaly, the duration of detecting the disappearance of the short circuit anomaly reaches the exit period before executing the corresponding protection policy, it indicates that the first switch k1 between the load 2 and the power supply is largely tripped, at this time, the short circuit anomaly is eliminated, and the corresponding protection policy is not required to be executed any more.
In one possible implementation, the exit duration texit_set satisfies:
Tdb<Texit_set<Tenter_set。
wherein Tenter_set is a timing duration, tdb is a duration that the output current of the power supply is within a (-IscSet, iscSet) range, and IscSet is a preset current.
In this embodiment, reference may be made to fig. 3, and fig. 3 is a schematic waveform diagram of an output current of a power supply according to an embodiment of the present application. In FIG. 3, i out As shown in fig. 3, when the exit period is too short, the time when the short-circuit abnormality disappears reaches the exit period, it cannot be determined that the large current (here, the case where the output current is too large) disappears, and may just be because the output current just passes through the zero crossing point. Thus (2)The embodiment of the application sets Texit_set>Tdb to avoid the influence of zero crossing points, thereby accurately judging whether the large current disappears. Wherein Tdb is a period of time during which the output current of the power supply is within a (-IscSet, iscSet) range.
In this embodiment, tenter_set in fig. 3 represents a time period that can cover a current period of at least two power supply source output currents.
In one possible implementation, the power supply is connected to a plurality of nuclear power units, and a first switch is disposed between each nuclear power unit and the power supply. The abnormal current protection method of the power supply of the nuclear power equipment further comprises the following steps:
and determining the timing duration according to the short-circuit protection time of the first switch.
The short-circuit protection time of the first switch refers to the time required for switching the first switch from the closed state to the open state when a short circuit occurs on a line where the first switch is located.
In this embodiment, as can be seen from the analysis of the foregoing embodiment, the purpose of the delay timer is to provide enough time for the first switch to automatically open, and then on this basis, the short-circuit protection time of the first switch can be obtained to determine the timer duration. If the short-circuit protection time of the first switch cannot be obtained, the common type of the first switch can be determined, and the timing duration is determined according to the short-circuit protection time of the first switch of the common type.
In one possible implementation, the timing duration is not less than the maximum guard time.
Wherein the maximum protection time refers to the maximum value of the short-circuit protection time of all the first switches.
In this embodiment, the method for determining the timing length tenter_set according to the short-circuit protection time of the first switch is as follows: tenter_set=t max +Δt, where t max For maximum guard time, Δt is a preset amount of time.
In one possible implementation manner, the current anomaly protection method further includes:
and if the current abnormality type is short-circuit abnormality and the timing duration is longer than the preset undervoltage detection duration, adjusting an undervoltage detection criterion corresponding to the power supply or not responding to an undervoltage protection strategy corresponding to the power supply.
The undervoltage detection duration is a detection duration when the undervoltage of the power supply is determined, that is, when the output voltage of the power supply is detected to be smaller than a preset undervoltage threshold value and the duration when the output voltage of the power supply is smaller than the preset undervoltage threshold value reaches the undervoltage detection duration, the undervoltage of the power supply is determined to have occurred.
The undervoltage detection criterion is a criterion adopted when the undervoltage of the power supply is judged.
In this embodiment, when the current anomaly type is a short-circuit anomaly, the output voltage of the power supply is lower, and if the timing duration is smaller than the undervoltage detection duration, the undervoltage anomaly of the power supply is detected, that is, erroneous judgment and erroneous protection are caused. Therefore, if the current anomaly type is short-circuit anomaly and the timing duration is longer than the preset undervoltage detection duration, the embodiment can adjust the undervoltage detection criterion corresponding to the power supply or does not respond to the undervoltage protection strategy corresponding to the power supply, so that erroneous judgment or error protection is avoided, and the reliability of power supply is affected.
In this embodiment, the adjusting the undervoltage detection criterion corresponding to the power supply includes: the undervoltage detection duration is prolonged, or the active output power of the power supply is additionally used as the criterion of undervoltage detection.
In one possible implementation, if the current anomaly type of the power supply is a short circuit anomaly, the corresponding protection policy is to turn off the power supply.
In this embodiment, the protection policy corresponding to the short-circuit abnormality is to turn off the power supply. The above embodiments are integrated, that is: if the power supply is abnormal due to short circuit and the abnormal mark is not withdrawn all the time in the timing period of the timing duration, the power supply can be turned off after the abnormal mark is continuously timed for the duration, so that damage to components in the power supply is avoided. If the power supply is short-circuited and the abnormal identifier is withdrawn during the time period of the time duration, the power supply may not be turned off.
In one possible implementation, the power supply includes a bypass and an inverter circuit connected in parallel.
If the current abnormality type of the power supply is current surge abnormality and the current power supply line is an inverter circuit, the corresponding protection strategy is: the current supply line is switched to the bypass.
In this embodiment, if the power supply includes a bypass and an inverter circuit connected in parallel, and the current power supply line is the inverter circuit when current surge abnormality occurs in the power supply, the current power supply line of the power supply may be switched to the bypass to avoid the influence of current surge on the components of the inverter circuit.
By integrating the above embodiments, the application distinguishes the abnormal situation of excessive current through considering the actual application scene, and gives out a corresponding protection strategy, and on the basis, the application can effectively ensure the power supply reliability of the power supply during actual application.
Referring to fig. 4, in another aspect of the present application, there is further provided a current anomaly protection device 300 for a power supply of a nuclear power device, including: one or more processors 301, one or more input devices 302, one or more output devices 303, and one or more memories 304. The processor 301, the input device 302, the output device 303, and the memory 304 communicate with each other via a communication bus 305. The memory 304 is used to store a computer program comprising program instructions. The processor 301 is configured to execute program instructions stored in the memory 304. Wherein the processor 301 is configured to invoke program instructions to perform the steps of the method embodiments described above.
It should be appreciated that in embodiments of the present application, the processor 301 may be a central processing unit (CentralProcessingUnit, CPU). The processor may also be other general purpose processors, digital signal processors (DigitalSignalProcessor, DSP), application specific integrated circuits (ApplicationSpecificIntegratedCircuit, ASIC), off-the-shelf programmable gate arrays (Field-ProgrammableGateArray, FPGA) or other programmable logic devices, discrete gate or transistor logic devices, discrete hardware components, or the like. A general purpose processor may be a microprocessor or the processor may be any conventional processor or the like. The input device 302 may include a touch pad, a fingerprint sensor (for collecting fingerprint information of a user and direction information of a fingerprint), a microphone, etc., and the output device 303 may include a display (LCD, etc.), a speaker, etc. The memory 304 may include read only memory and random access memory and provides instructions and data to the processor 301. A portion of memory 304 may also include non-volatile random access memory. For example, the memory 304 may also store information of device type. In a specific implementation, the processor 301, the input device 302, and the output device 303 described in the embodiments of the present application may execute the implementation manners described in the first embodiment and the second embodiment of the current anomaly protection method for the power supply of the nuclear power device provided in the embodiments of the present application.
In still another aspect of the present application, there is also provided a power supply system including:
the current abnormality protection device of the power supply of the nuclear power equipment is described above.
The present application is not limited to the above embodiments, and various equivalent modifications and substitutions can be easily made by those skilled in the art within the technical scope of the present application, and these modifications and substitutions are intended to be included in the scope of the present application. Therefore, the protection scope of the application is subject to the protection scope of the claims.
Claims (10)
1. The current abnormality protection method for the power supply of the nuclear power equipment is characterized by comprising the following steps of:
acquiring electrical parameters of a power supply of nuclear power equipment, wherein the electrical parameters comprise output current;
when the output current exceeds a preset current, determining a current abnormality type of the power supply according to the electrical parameter, and generating an abnormality identification corresponding to the current abnormality type;
and acquiring a timing duration pre-configured for the current abnormality type, and executing a protection strategy corresponding to the current abnormality type when the duration of the abnormality identification reaches the timing duration.
2. The method for protecting a power supply of a nuclear power plant from current abnormality according to claim 1, wherein the electrical parameter further includes an output voltage, and the type of current abnormality includes a short-circuit abnormality and a current surge abnormality; the determining the current abnormality type of the power supply according to the electrical parameter comprises the following steps:
if the output voltage of the power supply circuit is smaller than a first preset voltage, the current abnormality type of the power supply is short circuit abnormality;
if the output voltage of the power supply circuit is larger than a second preset voltage, the current abnormality type of the power supply is current impact abnormality;
the second preset voltage is not smaller than the first preset voltage, and the timing time length corresponding to the short circuit abnormality is longer than the timing time length corresponding to the current impact abnormality.
3. The method for protecting a current anomaly of a power supply of a nuclear power plant according to claim 1, wherein the generating an anomaly identification corresponding to the type of the current anomaly comprises:
generating an abnormality identification corresponding to the current abnormality type when the duration of the current abnormality type of the power supply exceeds a preset detection duration; or generating an abnormality identification corresponding to the current abnormality type when determining the current abnormality type of the power supply.
4. The method for protecting a current abnormality of a power supply of a nuclear power plant according to claim 1, wherein if the current abnormality type is a short-circuit abnormality, the method for protecting a current abnormality further comprises:
if the disappearance time of the short circuit abnormality in the power supply reaches a preset exit time, the abnormality identification is withdrawn; wherein the exit duration is less than the timing duration.
5. The method for protecting abnormal current of power supply of nuclear power equipment according to claim 4, wherein the exit period texit_set satisfies: tdb < texit_set < tenter_set;
wherein tenter_set is the timing duration, tdb is the duration of the output current of the power supply within a (-IscSet, iscSet) range, iscSet is the preset current.
6. The method for protecting abnormal current of power supply of nuclear power equipment according to claim 1, wherein the power supply is connected with a plurality of nuclear power equipment, and a first switch is arranged between each nuclear power equipment and the power supply; the current abnormality protection method further includes:
determining the timing duration according to the short-circuit protection time of the first switch;
the short-circuit protection time of the first switch refers to the time required for switching the first switch from a closed state to an open state when a short circuit occurs on a line where the first switch is located;
the timing duration is not less than the maximum protection time, and the maximum protection time refers to the maximum value of the short-circuit protection time of all the first switches.
7. The method for protecting a current anomaly of a power supply of a nuclear power plant according to claim 1, further comprising:
if the current abnormality type is short-circuit abnormality and the timing duration is longer than a preset undervoltage detection duration, adjusting an undervoltage detection criterion corresponding to the power supply or not responding to an undervoltage protection strategy corresponding to the power supply;
the undervoltage detection time is a detection time for judging the undervoltage of the power supply, and the undervoltage detection criterion is a criterion adopted for judging the undervoltage of the power supply.
8. The method for protecting a power supply of a nuclear power plant from abnormal current according to any one of claims 1 to 7, wherein the power supply includes a bypass and an inverter circuit connected in parallel;
if the current abnormality type of the power supply is current surge abnormality and the current power supply line is the inverter circuit, the corresponding protection strategy is: switching the current power supply line to a bypass;
if the current abnormality type of the power supply is short-circuit abnormality, the corresponding protection strategy is to turn off the power supply.
9. A current anomaly protection device for a power supply of a nuclear power plant, comprising a memory, a processor and a computer program stored in the memory and executable on the processor, characterized in that the processor implements the steps of the method according to any one of claims 1 to 8 when executing the computer program.
10. A power supply system, comprising:
the current anomaly protection device for a power supply of a nuclear power plant according to claim 9.
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| CN202310464452.4A CN116780462A (en) | 2023-04-26 | 2023-04-26 | Current abnormality protection method and device for power supply of nuclear power equipment and power supply system |
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| CN202310464452.4A CN116780462A (en) | 2023-04-26 | 2023-04-26 | Current abnormality protection method and device for power supply of nuclear power equipment and power supply system |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN119482336A (en) * | 2025-01-14 | 2025-02-18 | 深圳市龙星辰电源有限公司 | A medical power supply and multi-level safety protection method thereof |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN119482336A (en) * | 2025-01-14 | 2025-02-18 | 深圳市龙星辰电源有限公司 | A medical power supply and multi-level safety protection method thereof |
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