CN112653092B - Generator exit protection method and terminal equipment - Google Patents
Generator exit protection method and terminal equipment Download PDFInfo
- Publication number
- CN112653092B CN112653092B CN202011538272.9A CN202011538272A CN112653092B CN 112653092 B CN112653092 B CN 112653092B CN 202011538272 A CN202011538272 A CN 202011538272A CN 112653092 B CN112653092 B CN 112653092B
- Authority
- CN
- China
- Prior art keywords
- generator
- preset
- output
- frequency
- rate
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Active
Links
- 238000000034 method Methods 0.000 title claims abstract description 57
- 230000003247 decreasing effect Effects 0.000 claims description 27
- 230000007423 decrease Effects 0.000 claims description 22
- 238000004590 computer program Methods 0.000 claims description 21
- 230000008569 process Effects 0.000 claims description 18
- 230000009467 reduction Effects 0.000 claims description 18
- 230000008859 change Effects 0.000 claims description 14
- 238000003860 storage Methods 0.000 claims description 8
- 230000010355 oscillation Effects 0.000 abstract description 5
- 238000010586 diagram Methods 0.000 description 6
- 230000006870 function Effects 0.000 description 6
- 238000012545 processing Methods 0.000 description 4
- 230000008878 coupling Effects 0.000 description 3
- 238000010168 coupling process Methods 0.000 description 3
- 238000005859 coupling reaction Methods 0.000 description 3
- 230000009286 beneficial effect Effects 0.000 description 2
- 238000004891 communication Methods 0.000 description 2
- 238000012360 testing method Methods 0.000 description 2
- 238000012935 Averaging Methods 0.000 description 1
- 238000012271 agricultural production Methods 0.000 description 1
- 238000003491 array Methods 0.000 description 1
- 230000005540 biological transmission Effects 0.000 description 1
- 230000007123 defense Effects 0.000 description 1
- 238000013461 design Methods 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 238000009776 industrial production Methods 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 230000003287 optical effect Effects 0.000 description 1
- 238000006467 substitution reaction Methods 0.000 description 1
Classifications
-
- 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
- H02H7/06—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 for dynamo-electric generators; for synchronous capacitors
Landscapes
- Engineering & Computer Science (AREA)
- Power Engineering (AREA)
- Control Of Eletrric Generators (AREA)
- Supply And Distribution Of Alternating Current (AREA)
Abstract
The application is applicable to the technical field of generators, and discloses a generator exit protection method and terminal equipment, wherein the generator supplies power to a load through a converter, and the method comprises the following steps: obtaining output parameters of a generator; judging whether the generator is about to withdraw or not according to the output parameters; and if the generator is judged to be about to withdraw, a control signal is sent to the converter, and the control signal is used for indicating the converter to carry out protection shutdown. The application can prevent the load from being failed due to the oscillation phenomenon when the generator exits, and can protect the load.
Description
Technical Field
The application belongs to the technical field of generators, and particularly relates to a generator exit protection method and terminal equipment.
Background
The generator is mechanical equipment for converting other forms of energy into electric energy, and has wide application in industrial and agricultural production, national defense, science and technology and daily life.
The generator can supply power to the load during normal operation. However, when the generator is withdrawn, the output current of the generator is increased, so that the oscillation phenomenon is easy to occur, and the generator is withdrawn for a long time and is in an oscillation state for a long time, so that the load is easy to be broken down.
Disclosure of Invention
In view of the above, the embodiment of the application provides a method for protecting the generator from being withdrawn and a terminal device, so as to solve the problem that the load is easy to fail when the generator is withdrawn in the prior art.
A first aspect of an embodiment of the present application provides a method for protecting a generator from being withdrawn, where the generator supplies power to a load through a converter, and the method for protecting the generator from being withdrawn includes:
obtaining output parameters of a generator;
judging whether the generator is about to withdraw or not according to the output parameters;
and if the generator is judged to be about to withdraw, a control signal is sent to the converter, and the control signal is used for indicating the converter to carry out protection shutdown.
A second aspect of an embodiment of the present application provides a generator exit protection device, where the generator exit protection device is adapted to the generator exit protection method described in the first aspect, where the generator supplies power to a load through a converter, and the generator exit protection device includes:
the acquisition module is used for acquiring output parameters of the generator;
the judging module is used for judging whether the generator is about to exit or not according to the output parameters;
and the sending module is used for sending a control signal to the converter if the generator is judged to be about to withdraw, and the control signal is used for indicating the converter to carry out protection shutdown.
A third aspect of an embodiment of the present application provides a terminal device comprising a memory, a processor and a computer program stored in the memory and capable of running on the processor, the processor implementing the steps of the generator exit protection method according to the first aspect when executing the computer program.
A fourth aspect of embodiments of the present application provides a computer readable storage medium storing a computer program which when executed by one or more processors performs the steps of the generator exit protection method of the first aspect.
Compared with the prior art, the embodiment of the application has the beneficial effects that: the power generator in the embodiment of the application supplies power to the load through the converter, the embodiment of the application can judge whether the power generator is about to withdraw according to the output parameters of the power generator, if the power generator is about to withdraw, a control signal is sent to the converter to ensure that the converter is protected and stopped, so that the power generator stops supplying power to the load, the occurrence of the condition that the load is failed due to the oscillation phenomenon when the power generator withdraws can be prevented, and the load can be protected.
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 described below, it being obvious that the drawings in the following description are only some embodiments of the present application, and that other drawings may be obtained according to these drawings without inventive effort for a person skilled in the art.
Fig. 1 is a schematic flow chart of an implementation of a method for protecting a generator exit according to an embodiment of the present application;
FIG. 2 is a schematic diagram of a generator for supplying power to a load according to an embodiment of the present application;
FIG. 3 is a schematic block diagram of a generator exit protection device provided by an embodiment of the present application;
fig. 4 is a schematic block diagram of a terminal device according to an embodiment of the present application.
Detailed Description
In the following description, for purposes of explanation and not limitation, specific details are set forth such as the particular system architecture, techniques, etc., in order to provide a thorough understanding of the embodiments of the present application. It will be apparent, however, to one skilled in the art that the present application may be practiced in other embodiments that depart from these specific details. In other instances, detailed descriptions of well-known systems, devices, circuits, and methods are omitted so as not to obscure the description of the present application with unnecessary detail.
In order to illustrate the technical scheme of the application, the following description is made by specific examples.
Fig. 1 is a schematic flow chart of an implementation of a method for protecting an exit of a generator according to an embodiment of the present application, and for convenience of explanation, only a portion related to the embodiment of the present application is shown. The execution body of the embodiment of the application can be a terminal device.
Fig. 2 is a schematic structural diagram of a generator for supplying power to a load according to an embodiment of the present application. As shown in fig. 2, the generator 21 supplies power to the load 23 through the converter 22 in normal operation, and the battery 24 supplies power to the load 23 through the converter 22 after the generator 21 is withdrawn. The converter 22 may be an AC/DC converter, or may include an AC/DC converter and a DC/AC converter. The specific structure of the current transformer 22 can be set according to the requirements of the load 23.
As shown in fig. 1, the method may include the steps of:
s101: and obtaining output parameters of the generator.
Wherein, the output parameters of the generator can be obtained by adopting the existing method.
Alternatively, the output parameters of the generator may be obtained in real time.
S102: and judging whether the generator is about to withdraw or not according to the output parameters.
Optionally, whether the generator is about to be withdrawn or not may be determined according to the output parameter of the generator acquired in real time, and if it is determined that the generator is not about to be withdrawn, the process returns to S101 to continue the cycle execution.
S103: and if the generator is judged to be about to withdraw, a control signal is sent to the converter, and the control signal is used for indicating the converter to carry out protection shutdown.
In the embodiment of the application, if the generator is judged to be about to withdraw according to the output parameter of the generator, a control signal is sent to the converter. The converter can carry out protection shutdown according to the control signal, namely, the electric connection relation between the generator and the load is disconnected, so that the generator does not continue to supply power to the load, and the purpose of protecting the load can be achieved. When the generator is no longer supplying power to the load, the battery may supply power to the load through the converter.
As can be seen from the above description, the power generator in the embodiment of the present application supplies power to the load through the current transformer, and the embodiment of the present application can determine whether the power generator is about to withdraw according to the output parameter of the power generator, and if it is determined that the power generator is about to withdraw, send a control signal to the current transformer to make the current transformer perform protection shutdown, so that the power generator stops supplying power to the load, and the load can be protected by preventing the occurrence of a fault condition of the load caused by an oscillation phenomenon when the power generator withdraws.
In one embodiment of the present application, the output parameter includes an output frequency;
the step S102 may include the steps of:
acquiring the rate of decrease of the output frequency in a first preset time;
if the rate of decrease of the output frequency in the first preset time is not less than the first preset percentage, judging that the generator is about to exit;
if the rate of decrease of the output frequency is less than the first preset percentage in the first preset time, the generator is judged not to be about to exit.
In the process of exiting, the output frequency of the generator is reduced at a certain rate, and whether the generator is about to exit or not can be judged according to the reduction rate of the output frequency in a certain time.
The decreasing rate of the output frequency in the first preset time may be obtained by subtracting the output frequency at the end of the first preset time from the output frequency at the beginning of the first preset time, and dividing the frequency difference by the output frequency at the beginning of the first preset time.
The first preset time may be set according to actual needs, for example, the current time may be taken as the ending time of the first preset time, and then the current time is pushed forward for a period of time to be taken as the starting time of the first preset time, where the duration of the first preset time is generally a smaller duration. The first preset percentage is larger than 0, and the specific value of the first preset percentage can be set according to actual requirements.
In one embodiment of the present application, in the step S103, the step of sending a control signal to the current transformer may include the steps of:
determining the moment when the output frequency drops to a preset frequency lower limit value according to the current output frequency value and the drop rate of the output frequency in a first preset time;
transmitting a control signal to the converter at a timing when the output frequency falls to a preset frequency lower limit value, or transmitting a control signal including a timing when the output frequency falls to a preset frequency lower limit value to the converter; the control signal is used for indicating the converter to carry out protection shutdown at the moment when the output frequency is reduced to the preset frequency lower limit value.
The lower frequency limit value may be an output frequency value of the generator that starts to affect the load performance during the exiting process. That is, when the output frequency of the generator is lower than the lower frequency limit value during the exiting process, the load is affected, and the load may be failed.
In the embodiment of the application, the moment when the output frequency is reduced to the lower frequency limit value can be predicted according to the current output frequency value and the reduction rate of the output frequency in the first preset time, and the converter is controlled to perform protection shutdown at the moment, so that the utilization rate of the generator can be improved on the premise of protecting the load.
Specifically, a control signal is sent to the converter at the moment when the predicted output frequency is reduced to the lower limit value of the frequency, and the converter immediately performs protection shutdown after receiving the control signal; the control signal including the time when the output frequency falls to the preset frequency lower limit value may be transmitted to the converter, and the converter may perform the protection shutdown at the time when the output frequency falls to the preset frequency lower limit value after receiving the control signal.
In one embodiment of the application, the output parameters further comprise at least one of an output voltage amplitude, an output current amplitude, and an output phase;
if the rate of decrease of the output frequency is not less than the first preset percentage in the first preset time, determining that the generator is about to exit comprises:
if the decreasing rate of the output frequency in the first preset time is not smaller than the first preset percentage and the first preset condition is met, judging that the generator is about to exit;
the first preset condition includes at least one of a rate of decrease of the output voltage amplitude within a first preset time being not less than a second preset percentage, a rate of decrease of the output current amplitude within the first preset time being not less than a third preset percentage, and a rate of decrease of a rate of change of the output phase within the first preset time being not less than a fourth preset percentage.
In the process of exiting the generator, besides the output frequency is reduced in a certain rule, the amplitude of the output voltage, the amplitude of the output current and the change rate of the output phase are also reduced in a certain rule. In order to improve the accuracy of the result of judging whether the generator is about to be withdrawn, at least one of the amplitude of the output voltage, the amplitude of the output current and the rate of change of the output phase may be combined with the output frequency to jointly judge whether the generator is about to be withdrawn.
The second preset percentage, the third preset percentage and the fourth preset percentage are all larger than 0, and specific values can be set according to actual requirements.
In one embodiment of the present application, the generator exit protection method further comprises:
acquiring a first frequency drop rate and a second frequency drop rate; the first frequency reduction rate is the reduction rate of the output frequency of the generator in a first preset time in the exiting process when the generator is idle, and the second frequency reduction rate is the reduction rate of the output frequency of the generator in the first preset time in the exiting process when the generator is loaded;
and obtaining a first preset percentage according to the first frequency reduction rate and the second frequency reduction rate.
In an embodiment of the application, the value of the first preset percentage may be determined by testing the generator. The generator load may be full.
The first preset percentage is obtained according to the first frequency decreasing rate and the second frequency decreasing rate, which may be obtained by averaging the first frequency decreasing rate and the second frequency decreasing rate, or may be obtained by performing weighted summation on the first frequency decreasing rate and the second frequency decreasing rate, or may be any other realizable manner, which is not particularly limited herein.
In addition, the second preset percentage, the third preset percentage and the fourth preset percentage may also determine specific values by using similar methods, which will not be described again.
In one embodiment of the application, the output parameter comprises an output frequency;
the step S102 may include the steps of:
acquiring the dropping rate of the output frequency in a second preset time;
if the falling rate of the output frequency is within the preset frequency falling rate range in the second preset time, judging that the generator is about to exit;
if the falling rate of the output frequency is not in the preset frequency falling rate range in the second preset time, judging that the generator is not about to exit.
During the exiting process of the generator, the output frequency of the generator is reduced at a certain rate, and whether the generator is about to exit or not can be judged according to the reduction rate of the output frequency in a period of time.
The decreasing rate of the output frequency in the second preset time may be obtained by subtracting the output frequency at the end of the second preset time from the output frequency at the beginning of the second preset time, where the frequency difference is in the second preset time to obtain the decreasing rate of the output frequency in the second preset time.
The second preset time may be set according to actual requirements, for example, the current time may be taken as the second preset time end time, and then the current time is pushed forward for a period of time to be taken as the second preset time start time, where the duration of the second preset time is generally a smaller duration.
If the falling rate of the output frequency in the second preset time is within a certain range of the falling rate of the output frequency, namely within the range of the preset frequency falling rate, judging that the generator is about to exit; otherwise, it is determined that the generator is not about to exit.
The preset frequency falling speed range can be determined by testing the generator. Illustratively, a first rate of frequency decrease and a second rate of frequency decrease are obtained; the first frequency falling rate is the falling rate of the output frequency of the generator in a second preset time in the exiting process when the generator is idle, and the second frequency falling rate is the falling rate of the output frequency of the generator in the second preset time in the exiting process when the generator is loaded; the preset frequency decreasing rate range is a range formed by the first frequency decreasing rate, the second frequency decreasing rate and the value between the first frequency decreasing rate and the second frequency decreasing rate.
Alternatively, the time when the output frequency falls to the preset frequency lower limit value may be determined according to the current output frequency value and the falling rate of the output frequency in the second preset time; transmitting a control signal to the converter at a timing when the output frequency falls to a preset frequency lower limit value, or transmitting a control signal including a timing when the output frequency falls to a preset frequency lower limit value to the converter; the control signal is used for indicating the converter to carry out protection shutdown at the moment when the output frequency is reduced to the preset frequency lower limit value.
In one embodiment of the application, the output parameters further comprise at least one of an output voltage amplitude, an output current amplitude, and an output phase;
if the falling rate of the output frequency is within the preset frequency falling rate range in the second preset time, judging that the generator is about to exit, wherein the method comprises the following steps:
if the descending speed of the output frequency is in the range of the descending speed of the preset frequency in the second preset time and the second preset condition is met, judging that the generator is about to withdraw;
the second preset condition includes at least one of a falling rate of the output voltage amplitude within a second preset time being within a falling rate range of the preset voltage amplitude, a falling rate of the output current amplitude within a second preset time being within a falling rate range of the preset current amplitude, and a falling rate of a change rate of the output phase within a second preset time being within a falling rate range of the preset phase change rate.
During the exit of the generator, in addition to the output frequency falling at a certain rate, the amplitude of the output voltage, the amplitude of the output current and the rate of change of the output phase also fall at a certain rate. In order to improve the accuracy of the result of judging whether the generator is about to be withdrawn, at least one of the amplitude of the output voltage, the amplitude of the output current and the rate of change of the output phase may be combined with the output frequency to jointly judge whether the generator is about to be withdrawn.
The method for determining the preset voltage amplitude decreasing rate range, the preset current amplitude decreasing rate range and the decreasing rate range of the preset phase change rate is similar to the method for determining the preset frequency decreasing rate range, and is not repeated.
Alternatively, it may be determined whether the generator is about to be exited based on the rate of decrease of the output parameter and the rate of decrease of the output parameter over a period of time.
It should be understood that the sequence number of each step in the foregoing embodiment does not mean that the execution sequence of each process should be determined by the function and the internal logic, and should not limit the implementation process of the embodiment of the present application.
Corresponding to the generator exit protection method, an embodiment of the application also provides a generator exit protection device which has the same beneficial effects as the generator exit protection method. Fig. 3 is a schematic block diagram of a generator exit protection device according to an embodiment of the present application, and only a portion related to the embodiment of the present application is shown for convenience of explanation.
In the embodiment of the present application, the generator supplies power to the load through the converter, and the generator exit protection device 30 is suitable for the generator exit protection method described above, and may include an acquisition module 301, a judgment module 302, and a sending module 303.
The acquiring module 301 is configured to acquire an output parameter of the generator;
a judging module 302, configured to judge whether the generator is about to exit according to the output parameter;
and the sending module 303 is configured to send a control signal to the converter if it is determined that the generator is about to be withdrawn, where the control signal is used to instruct the converter to perform protection shutdown.
In one embodiment of the present application, the output parameter includes an output frequency;
the judging module 302 is specifically configured to:
acquiring the rate of decrease of the output frequency in a first preset time;
if the rate of decrease of the output frequency in the first preset time is not less than the first preset percentage, judging that the generator is about to exit;
if the rate of decrease of the output frequency is less than the first preset percentage in the first preset time, the generator is judged not to be about to exit.
In one embodiment of the present application, the sending module 303 may be further configured to:
determining the moment when the output frequency drops to a preset frequency lower limit value according to the current output frequency value and the drop rate of the output frequency in a first preset time;
transmitting a control signal to the converter at a timing when the output frequency falls to a preset frequency lower limit value, or transmitting a control signal including a timing when the output frequency falls to a preset frequency lower limit value to the converter; the control signal is used for indicating the converter to carry out protection shutdown at the moment when the output frequency is reduced to the preset frequency lower limit value.
In one embodiment of the application, the output parameters further comprise at least one of an output voltage amplitude, an output current amplitude, and an output phase;
the judging module 302 may also be configured to:
if the decreasing rate of the output frequency in the first preset time is not smaller than the first preset percentage and the first preset condition is met, judging that the generator is about to exit;
the first preset condition includes at least one of a rate of decrease of the output voltage amplitude within a first preset time being not less than a second preset percentage, a rate of decrease of the output current amplitude within the first preset time being not less than a third preset percentage, and a rate of decrease of a rate of change of the output phase within the first preset time being not less than a fourth preset percentage.
In one embodiment of the application, the output parameter comprises an output frequency;
the judging module 302 is specifically configured to:
acquiring the dropping rate of the output frequency in a second preset time;
if the falling rate of the output frequency is within the preset frequency falling rate range in the second preset time, judging that the generator is about to exit;
if the falling rate of the output frequency is not in the preset frequency falling rate range in the second preset time, judging that the generator is not about to exit.
In one embodiment of the present application, the output parameter further includes at least one of an output voltage amplitude, an output current amplitude, and an output phase;
the judging module 302 may also be configured to:
if the descending speed of the output frequency is in the range of the descending speed of the preset frequency in the second preset time and the second preset condition is met, judging that the generator is about to withdraw;
the second preset condition includes at least one of a falling rate of the output voltage amplitude within a second preset time being within a falling rate range of the preset voltage amplitude, a falling rate of the output current amplitude within a second preset time being within a falling rate range of the preset current amplitude, and a falling rate of a change rate of the output phase within a second preset time being within a falling rate range of the preset phase change rate.
In one embodiment of the present application, the generator exit protection device 30 may further include a parameter determination module.
The parameter determination module is used for:
acquiring a first frequency drop rate and a second frequency drop rate; the first frequency reduction rate is the reduction rate of the output frequency of the generator in a first preset time in the exiting process when the generator is idle, and the second frequency reduction rate is the reduction rate of the output frequency of the generator in the first preset time in the exiting process when the generator is loaded;
and obtaining a first preset percentage according to the first frequency reduction rate and the second frequency reduction rate.
It will be clearly understood by those skilled in the art that, for convenience and brevity of description, only the above-mentioned division of each functional unit and module is exemplified, and in practical application, the above-mentioned functional allocation may be performed by different functional units and modules according to needs, i.e. the internal structure of the generator exit protection device is divided into different functional units or modules, so as to perform all or part of the above-mentioned functions. The functional units and modules in the embodiment may be integrated in one processing unit, or each unit may exist alone physically, or two or more units may be integrated in one unit, where the integrated units may be implemented in a form of hardware or a form of a software functional unit. In addition, the specific names of the functional units and modules are only for distinguishing from each other, and are not used for limiting the protection scope of the present application. The specific working process of the units and modules in the above device may refer to the corresponding process in the foregoing method embodiment, which is not described herein again.
Fig. 4 is a schematic block diagram of a terminal device according to an embodiment of the present application. As shown in fig. 4, the terminal device 40 of this embodiment includes: one or more processors 401, a memory 402, and a computer program 403 stored in the memory 402 and capable of running on the processor 401. The processor 401, when executing the computer program 403, implements the steps in the embodiments of the generator exit protection method described above, such as steps S101 to S103 shown in fig. 1. Alternatively, the processor 401, when executing the computer program 403, performs the functions of the modules/units of the embodiment of the generator exit protection device described above, such as the functions of the modules 301 to 303 shown in fig. 3.
Illustratively, the computer program 403 may be partitioned into one or more modules/units that are stored in the memory 402 and executed by the processor 401 to complete the present application. The one or more modules/units may be a series of computer program instruction segments capable of performing the specified functions describing the execution of the computer program 403 in the terminal device 40. For example, the computer program 403 may be divided into an acquisition module, a determination module and a transmission module, where each module specifically functions as follows:
the acquisition module is used for acquiring output parameters of the generator;
the judging module is used for judging whether the generator is about to exit or not according to the output parameters;
and the sending module is used for sending a control signal to the converter if the generator is judged to be about to withdraw, and the control signal is used for indicating the converter to carry out protection shutdown.
Other modules or units may be described with reference to the embodiment shown in fig. 3, and will not be described here again.
The terminal device 40 may be a computing device such as a desktop computer, a notebook computer, a palm computer, and a cloud server. The terminal device 40 may also be the load itself. The terminal device 40 includes, but is not limited to, a processor 401, a memory 402. It will be appreciated by those skilled in the art that fig. 4 is merely an example of the terminal device 40 and is not meant to be limiting of the terminal device 40, and may include more or fewer components than shown, or may combine certain components, or different components, e.g., the terminal device 40 may also include input devices, output devices, network access devices, buses, etc.
The processor 401 may be a central processing unit (Central Processing Unit, CPU), but may also be other general purpose processors, digital signal processors (Digital Signal Processor, DSP), application specific integrated circuits (Application Specific Integrated Circuit, ASIC), field programmable gate arrays (Field-Programmable Gate Array, 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 memory 402 may be an internal storage unit of the terminal device 40, such as a hard disk or a memory of the terminal device 40. The memory 402 may also be an external storage device of the terminal device 40, such as a plug-in hard disk, a Smart Media Card (SMC), a Secure Digital (SD) Card, a Flash memory Card (Flash Card) or the like, which are provided on the terminal device 40. Further, the memory 402 may also include both internal storage units and external storage devices of the terminal device 40. The memory 402 is used for storing the computer program 403 and other programs and data required by the terminal device 40. The memory 402 may also be used to temporarily store data that has been output or is to be output.
In the foregoing embodiments, the descriptions of the embodiments are emphasized, and in part, not described or illustrated in any particular embodiment, reference is made to the related descriptions of other embodiments.
Those of ordinary skill in the art will appreciate that the various illustrative elements and algorithm steps described in connection with the embodiments disclosed herein may be implemented as electronic hardware, or combinations of computer software and electronic hardware. Whether such functionality is implemented as hardware or software depends upon the particular application and design constraints imposed on the solution. Skilled artisans may implement the described functionality in varying ways for each particular application, but such implementation decisions should not be interpreted as causing a departure from the scope of the present application.
In the embodiments provided in the present application, it should be understood that the disclosed generator exit protection apparatus and method may be implemented in other manners. For example, the generator exit protection device embodiments described above are merely illustrative, e.g., the division of the modules or units is merely a logical functional division, and there may be additional divisions of actual implementation, e.g., multiple units or components may be combined or integrated into another system, or some features may be omitted, or not performed. Alternatively, the coupling or direct coupling or communication connection shown or discussed may be an indirect coupling or communication connection via interfaces, devices or units, which may be in electrical, mechanical or other forms.
The units described as separate units may or may not be physically separate, and units shown as units may or may not be physical units, may be located in one place, or may be distributed on a plurality of network units. Some or all of the units may be selected according to actual needs to achieve the purpose of the solution of this embodiment.
In addition, each functional unit in the embodiments of the present application may be integrated in one processing unit, or each unit may exist alone physically, or two or more units may be integrated in one unit. The integrated units may be implemented in hardware or in software functional units.
The integrated modules/units, if implemented in the form of software functional units and sold or used as stand-alone products, may be stored in a computer readable storage medium. Based on such understanding, the present application may implement all or part of the flow of the method of the above embodiment, or may be implemented by a computer program to instruct related hardware, where the computer program may be stored in a computer readable storage medium, and when the computer program is executed by a processor, the computer program may implement the steps of each of the method embodiments described above. Wherein the computer program comprises computer program code which may be in source code form, object code form, executable file or some intermediate form etc. The computer readable medium may include: any entity or device capable of carrying the computer program code, a recording medium, a U disk, a removable hard disk, a magnetic disk, an optical disk, a computer Memory, a Read-Only Memory (ROM), a random access Memory (RAM, random Access Memory), an electrical carrier signal, a telecommunications signal, a software distribution medium, and so forth. It should be noted that the computer readable medium may include content that is subject to appropriate increases and decreases as required by jurisdictions in which such content is subject to legislation and patent practice, such as in certain jurisdictions in which such content is not included as electrical carrier signals and telecommunication signals.
The above embodiments are only for illustrating the technical solution of the present application, and not for limiting the same; although the application has been described in detail with reference to the foregoing embodiments, it will be understood by those of ordinary skill in the art that: the technical scheme described in the foregoing embodiments can be modified or some technical features thereof can be replaced by equivalents; such modifications and substitutions do not depart from the spirit and scope of the technical solutions of the embodiments of the present application, and are intended to be included in the scope of the present application.
Claims (8)
1. The method for protecting the withdrawal of the generator is characterized in that the generator supplies power for a load through a converter; the generator exit protection method comprises the following steps:
obtaining output parameters of a generator;
judging whether the generator is about to exit or not according to the output parameters;
if the generator is judged to be about to withdraw, a control signal is sent to the converter, and the control signal is used for indicating the converter to perform protection shutdown;
the output parameters include an output frequency;
the judging whether the generator is about to exit according to the output parameters comprises the following steps:
acquiring the reduction rate of the output frequency in a first preset time; if the decreasing rate of the output frequency is not smaller than a first preset percentage in the first preset time, judging that the generator is about to exit; if the decreasing rate of the output frequency is smaller than the first preset percentage in the first preset time, judging that the generator is not about to exit; or alternatively, the first and second heat exchangers may be,
acquiring the dropping rate of the output frequency in a second preset time; if the falling rate of the output frequency is within the preset frequency falling rate range in the second preset time, judging that the generator is about to exit; and if the falling rate of the output frequency is not in the preset frequency falling rate range within the second preset time, judging that the generator is not about to exit.
2. The method of claim 1, wherein the sending a control signal to the converter comprises:
determining the moment when the output frequency drops to a preset frequency lower limit value according to the current output frequency value and the drop rate of the output frequency in the first preset time;
transmitting a control signal to the converter at a timing when the output frequency falls to a preset frequency lower limit value, or transmitting a control signal including a timing when the output frequency falls to a preset frequency lower limit value to the converter; the control signal is used for indicating the converter to carry out protection shutdown at the moment when the output frequency is reduced to a preset frequency lower limit value.
3. The generator exit protection method of claim 1, wherein the output parameters further comprise at least one of an output voltage amplitude, an output current amplitude, and an output phase;
and if the rate of decrease of the output frequency is not less than a first preset percentage in the first preset time, determining that the generator is about to be withdrawn, including:
if the decreasing rate of the output frequency is not smaller than a first preset percentage in the first preset time and a first preset condition is met, judging that the generator is about to exit;
the first preset condition includes at least one of a rate of decrease of the output voltage amplitude within the first preset time being not less than a second preset percentage, a rate of decrease of the output current amplitude within the first preset time being not less than a third preset percentage, and a rate of decrease of a rate of change of the output phase within the first preset time being not less than a fourth preset percentage.
4. The generator exit protection method of claim 1, wherein the output parameters further comprise at least one of an output voltage amplitude, an output current amplitude, and an output phase;
and if the falling rate of the output frequency is within the preset frequency falling rate range in the second preset time, determining that the generator is about to be withdrawn, including:
if the descending speed of the output frequency is in the range of the descending speed of the preset frequency within the second preset time and the second preset condition is met, judging that the generator is about to withdraw;
the second preset condition includes at least one of a falling rate of the output voltage amplitude within a preset voltage amplitude falling rate range within the second preset time, a falling rate of the output current amplitude within a preset current amplitude falling rate range within the second preset time, and a falling rate of a change rate of the output phase within a falling rate range of a preset phase change rate within the second preset time.
5. A generator exit protection method as claimed in any one of claims 1 to 3, further comprising:
acquiring a first frequency drop rate and a second frequency drop rate; the first frequency decreasing rate is the decreasing rate of the output frequency of the generator in a first preset time in the exiting process when the generator is in idle load, and the second frequency decreasing rate is the decreasing rate of the output frequency of the generator in the first preset time in the exiting process when the generator is in load;
and obtaining the first preset percentage according to the first frequency reduction rate and the second frequency reduction rate.
6. A generator exit protection device, characterized in that it is adapted to the generator exit protection method according to any one of the preceding claims 1 to 5; the generator supplies power for a load through a converter; the generator exit protection device includes:
the acquisition module is used for acquiring output parameters of the generator;
the judging module is used for judging whether the generator is about to exit or not according to the output parameters;
and the sending module is used for sending a control signal to the converter if the generator is judged to be about to exit, and the control signal is used for indicating the converter to perform protection shutdown.
7. Terminal device comprising a memory, a processor and a computer program stored in the memory and capable of running on the processor, characterized in that the processor implements the steps of the generator exit protection method according to any one of claims 1 to 5 when the computer program is executed.
8. A computer readable storage medium, characterized in that it stores a computer program which, when executed by one or more processors, implements the steps of the generator exit protection method according to any one of claims 1 to 5.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202011538272.9A CN112653092B (en) | 2020-12-23 | 2020-12-23 | Generator exit protection method and terminal equipment |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202011538272.9A CN112653092B (en) | 2020-12-23 | 2020-12-23 | Generator exit protection method and terminal equipment |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN112653092A CN112653092A (en) | 2021-04-13 |
| CN112653092B true CN112653092B (en) | 2023-11-28 |
Family
ID=75359818
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202011538272.9A Active CN112653092B (en) | 2020-12-23 | 2020-12-23 | Generator exit protection method and terminal equipment |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN112653092B (en) |
Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5497332A (en) * | 1993-10-01 | 1996-03-05 | Automatic Terminal Information Systems, Inc. | Method and apparatus for metering and monitoring AC generators |
| JPH10191697A (en) * | 1996-12-20 | 1998-07-21 | Toshiba Corp | Control apparatus for wound-rotor induction machine |
| WO2016203800A1 (en) * | 2015-06-17 | 2016-12-22 | シャープ株式会社 | Power conditioner control device, power conditioner, power supply system, power conditioner control method, control program, and computer-readable recording medium |
| CN106787814A (en) * | 2017-03-29 | 2017-05-31 | 哈尔滨理工大学 | Nine level current transformers of magneto alternator |
| CN110224660A (en) * | 2019-07-01 | 2019-09-10 | 重庆科川电气有限公司 | A kind of frequency converter control method |
| WO2020102928A1 (en) * | 2018-11-19 | 2020-05-28 | 深圳市欢太科技有限公司 | Wireless signal transmission method, wireless signal transmission device and terminal device |
Family Cites Families (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US10727671B2 (en) * | 2017-08-08 | 2020-07-28 | Solar Turbines Incorporated | Gas turbine electrical power system and control strategy for limiting reverse power shutdown |
-
2020
- 2020-12-23 CN CN202011538272.9A patent/CN112653092B/en active Active
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5497332A (en) * | 1993-10-01 | 1996-03-05 | Automatic Terminal Information Systems, Inc. | Method and apparatus for metering and monitoring AC generators |
| JPH10191697A (en) * | 1996-12-20 | 1998-07-21 | Toshiba Corp | Control apparatus for wound-rotor induction machine |
| WO2016203800A1 (en) * | 2015-06-17 | 2016-12-22 | シャープ株式会社 | Power conditioner control device, power conditioner, power supply system, power conditioner control method, control program, and computer-readable recording medium |
| CN106787814A (en) * | 2017-03-29 | 2017-05-31 | 哈尔滨理工大学 | Nine level current transformers of magneto alternator |
| WO2020102928A1 (en) * | 2018-11-19 | 2020-05-28 | 深圳市欢太科技有限公司 | Wireless signal transmission method, wireless signal transmission device and terminal device |
| CN110224660A (en) * | 2019-07-01 | 2019-09-10 | 重庆科川电气有限公司 | A kind of frequency converter control method |
Non-Patent Citations (1)
| Title |
|---|
| 胡双栽.高炉风机停机保护系统的改进.《冶金动力》.2005,(第2期),第48-49页. * |
Also Published As
| Publication number | Publication date |
|---|---|
| CN112653092A (en) | 2021-04-13 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN110364775B (en) | Battery charging control method, battery charging control device and terminal | |
| CN110829576B (en) | Uninterruptible power supply input abnormity detection method and system and terminal equipment | |
| CN109066745B (en) | Electric energy storage system and operation control method, device and system thereof | |
| CN109818396B (en) | Charging method and device for lithium ion battery pack and terminal equipment | |
| CN110601283A (en) | Charging method and system | |
| CN109687485B (en) | Power distribution method and system of energy storage system and terminal equipment | |
| CN113629740B (en) | Power control method and device for accessing flywheel energy storage system into alternating current power grid | |
| CN109859069B (en) | Energy consumption alarm management method and device for generator set | |
| CN111106628A (en) | Frequency modulation control method and device based on generator and energy storage system and terminal equipment | |
| CN112653092B (en) | Generator exit protection method and terminal equipment | |
| CN110797968B (en) | Power-off prevention method and system for uninterruptible power supply and terminal equipment | |
| CN110729762A (en) | Island disturbance method, system and terminal equipment | |
| CN111342502B (en) | Forsmark effect suppression method and device based on bidirectional converter | |
| CN114142550A (en) | Control method and device of energy storage device and energy storage device | |
| CN113612272A (en) | Charging control method and device for uninterruptible power supply of new energy power generation system | |
| CN114714948A (en) | Charging overcurrent control method and device of battery system and storage medium | |
| CN109818089B (en) | Battery current limiting method and device | |
| CN110138028B (en) | Battery management system, battery charging and discharging control method thereof and terminal equipment | |
| CN115207888B (en) | Rapid export method and device of relay protection device, terminal and storage medium | |
| CN116154896A (en) | Battery balance control method and device of energy storage system, terminal and storage medium | |
| CN115158099A (en) | Power battery thermal management method and device, vehicle and storage medium | |
| CN112803524B (en) | Battery charging control method, device and terminal | |
| CN112713632A (en) | Control method and device for variable pitch system super capacitor charging equipment and terminal equipment | |
| CN112462901A (en) | Server heat dissipation method and device, electronic equipment and storage medium | |
| CN113224959B (en) | Inverter control method and UPS |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| GR01 | Patent grant | ||
| GR01 | Patent grant |