CN111781411A - Partial discharge pulse sequence generation method and device - Google Patents
Partial discharge pulse sequence generation method and device Download PDFInfo
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- CN111781411A CN111781411A CN202010697500.0A CN202010697500A CN111781411A CN 111781411 A CN111781411 A CN 111781411A CN 202010697500 A CN202010697500 A CN 202010697500A CN 111781411 A CN111781411 A CN 111781411A
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- G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
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Abstract
The invention discloses a method and a device for generating a partial discharge pulse sequence, which are used for facilitating a user to generate the partial discharge pulse sequence, and the method comprises the following steps: acquiring pulse characteristic information of each pulse in a pulse sequence to be processed; receiving a preset power supply signal and generating a trigger signal; generating a corresponding input voltage signal according to the pulse characteristic information; the input voltage signal and the trigger signal generate a partial discharge pulse sequence. Therefore, the test cost is reduced, and the method is more suitable for the generation process of the actual partial discharge pulse sequence.
Description
Technical Field
The invention relates to the technical field of high-voltage insulation, in particular to a method and a device for generating a partial discharge pulse sequence.
Background
Partial discharge measurement is a non-destructive method for effectively detecting insulation defects in high voltage electrical equipment. The presence of an insulation defect can increase the electric field in a local area around it, leading to a local insulation breakdown, in which small area a fast transfer of charge occurs. Partial discharge detection is typically based on an evaluation of an electrical quantity or a non-electrical signal during the discharge. It is well known that the occurrence of partial discharges may lead to a gradual deterioration of the insulation and eventually to an insulation failure. Therefore, the detection, localization and diagnosis of partial discharges are indispensable tasks for the evaluation of the insulation condition of high-voltage electrical equipment.
However, in practical use, the high-voltage electrical equipment may not be capable of generating a plurality of partial discharge types that can be measured by the partial discharge measuring instrument, so that it is difficult for a user to accurately evaluate whether the performance of the partial discharge measuring instrument reaches the standard. Therefore, in order to realize accurate classification and identification of the partial discharge type, a partial discharge pulse sequence can be generated by a digital signal processing method, and then the performance of the partial discharge tester can be accurately evaluated.
In the method for generating the partial discharge pulse sequence in the prior art, a high-voltage test system is adopted by a laboratory to cooperate with various simulation type partial discharge test models to simulate a discharge map, or the discharge map is output in a partial discharge pulse sequence mode according to a map of a preset partial discharge map database, the former has the problems of large test equipment, high test cost and the like due to the limitation of the laboratory environment, and the latter cannot effectively simulate the randomness and physical authenticity of partial discharge in a real environment due to the limitation of a partial discharge map database.
Disclosure of Invention
The invention provides a method and a device for generating a partial discharge pulse sequence, which solve the technical problems that in the prior art, the method for generating the partial discharge pulse sequence has large test equipment and high test cost, and cannot effectively simulate partial discharge in a real environment.
The invention provides a method for generating a partial discharge pulse sequence, which comprises the following steps:
acquiring pulse characteristic information of each pulse in a pulse sequence to be processed;
receiving a preset power supply signal and generating a trigger signal;
generating a corresponding input voltage signal according to the pulse characteristic information;
and generating a partial discharge pulse sequence by using the input voltage signal and the trigger signal.
Optionally, the initial information includes a pulse amplitude, a pulse polarity, and a pulse phase angle, and the step of obtaining pulse characteristic information of each pulse in the pulse sequence to be processed includes:
receiving a plurality of groups of pulse amplitudes, pulse polarities and pulse phase angles input by a user, and determining a first target partial discharge map;
and adopting the first target partial discharge map as pulse characteristic information.
Optionally, the initial information includes selection information of a plurality of preset partial discharge maps, and the step of obtaining pulse feature information of each pulse in the pulse sequence to be processed includes:
receiving selected information of the plurality of preset partial discharge maps from a user, and determining a second target partial discharge map;
and adopting the second target partial discharge map as pulse characteristic information.
Optionally, the step of receiving a preset power signal and generating a trigger signal includes:
receiving a preset power supply signal, and generating a coupling signal after executing signal coupling operation;
low-pass filtering the coupling signal to generate a sine synchronous signal;
comparing the sinusoidal synchronous signal with a preset direct-current voltage signal to generate a square wave signal;
and extracting a rising edge part of the square wave signal to generate a trigger signal.
Optionally, the step of generating a corresponding input voltage signal according to the pulse characteristic information includes:
detecting the pulse characteristic information, and determining a plurality of voltage amplitudes corresponding to the pulse characteristic information;
and dividing the plurality of voltage amplitudes according to a preset power frequency period to generate an input voltage signal.
Optionally, the step of generating a partial discharge pulse sequence by using the input voltage signal and the trigger signal includes:
when the trigger signal is received, outputting the input voltage signal;
and boosting the input voltage signal to generate a partial discharge pulse sequence.
The invention also provides a partial discharge pulse sequence generation device, which comprises a trigger signal simulation module, a partial discharge map simulation module and a Tesla coil control module which are respectively and electrically connected with the central control module;
the partial discharge map simulation module is used for acquiring pulse characteristic information of each pulse in a pulse sequence to be processed;
the trigger signal simulation module is used for receiving a preset power supply signal and generating a trigger signal;
the central control module is used for generating a corresponding input voltage signal according to the pulse characteristic information;
the Tesla coil control module is used for generating a partial discharge pulse sequence by adopting the input voltage signal and the trigger signal.
Optionally, the initial information includes a pulse amplitude, a pulse polarity, and a pulse phase angle, and the partial discharge map simulation module includes:
the first graphical interface sub-module is used for receiving a plurality of groups of pulse amplitudes, pulse polarities and pulse phase angles input by a user and determining a first target partial discharge map; and adopting the first target partial discharge map as pulse characteristic information.
Optionally, the initial information includes selection information of the preset partial discharge maps, and the partial discharge map simulation module includes:
the local discharge map database is used for storing the plurality of preset local discharge maps;
the second graphical interface submodule is used for receiving the selected information of the user on the plurality of preset partial discharge maps and determining a second target partial discharge map; and adopting the second target partial discharge map as pulse characteristic information.
Optionally, the trigger signal simulation module includes:
the isolation transformation submodule is used for receiving a preset power supply signal and generating a coupling signal after executing signal coupling operation;
the low-pass filtering submodule is used for carrying out low-pass filtering on the coupling signal to generate a sine synchronous signal;
the comparison submodule is used for comparing the sinusoidal synchronous signal with a preset direct-current voltage signal to generate a square wave signal;
and the trigger signal generation submodule is used for extracting the rising edge part of the square wave signal and generating a trigger signal.
Optionally, the central control module includes:
the voltage amplitude determining submodule is used for detecting the pulse characteristic information and determining a plurality of voltage amplitudes corresponding to the pulse characteristic information;
and the input voltage generation submodule is used for dividing the plurality of voltage amplitudes according to a preset power frequency cycle to generate an input voltage signal.
Further, the tesla coil control module includes:
the input voltage signal output submodule is used for outputting the input voltage signal when the trigger signal is received;
and the partial discharge pulse sequence generation submodule is used for boosting the input voltage signal to generate a partial discharge pulse sequence.
According to the technical scheme, the invention has the following advantages:
based on respective pulse characteristic information obtained from a preset pulse sequence to be processed, receiving a preset power supply signal through a partial discharge pulse sequence generating device, and simulating a high-voltage signal to generate a trigger signal so as to control the trigger time of the partial discharge pulse sequence, wherein the preset power supply signal can be commercial power; after the pulse characteristic signal and the trigger signal are generated, the partial discharge pulse sequence generation device determines the corresponding voltage of different partial discharge pulses in the pulse characteristic information according to the pulse characteristic information to generate a corresponding input voltage signal; and if the trigger signal is received, determining that the partial discharge pulse needs to be generated, and outputting a corresponding input voltage signal so as to generate a partial discharge pulse sequence. Different types of partial discharge pulse sequences can be generated based on the requirement of a user on the detection type of the partial discharge tester, a test environment does not need to be constructed, and the test cost is reduced; meanwhile, the generated partial discharge pulse sequence is boosted through the Tesla coil control module, the controllability of the pulse sequence is kept, meanwhile, the test randomness is increased, the partial discharge pulse sequence generation process in the actual measurement process is more fit, and the function of the partial discharge tester is more effectively evaluated.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below, and it is obvious that the drawings in the following description are only some embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to these drawings without inventive exercise.
FIG. 1 is a flowchart illustrating steps of a method for generating a partial discharge pulse sequence according to an embodiment of the present invention;
FIG. 2 is a flow chart of steps of a method of generating a partial discharge pulse train in accordance with an alternative embodiment of the present invention;
fig. 3 is a circuit diagram of a tesla control module of a partial discharge pulse sequence generating apparatus according to an embodiment of the present invention;
FIG. 4 is a flow chart of a partial discharge pulse sequence generation process according to an embodiment of the present invention;
FIG. 5 is a schematic diagram of a partial discharge pulse sequence generated in accordance with an embodiment of the present invention;
fig. 6 is a block diagram of a partial discharge pulse sequence generating apparatus according to an embodiment of the present invention.
Detailed Description
The embodiment of the invention provides a method and a device for generating a partial discharge pulse sequence, which are used for solving the technical problems that in the prior art, a test device for the method for generating the partial discharge pulse sequence is large, the test cost is high, and partial discharge in a real environment cannot be effectively simulated.
Wherein the partial discharge pulse train is a pulse train formed by one or more partial discharge pulses within a certain period.
In order to make the objects, features and advantages of the present invention more obvious and understandable, the technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present invention, and it is obvious that the embodiments described below are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
Referring to fig. 1, fig. 1 is a flowchart illustrating a method for generating a partial discharge pulse sequence according to an embodiment of the invention.
In an embodiment of the present invention, there is provided a partial discharge pulse sequence generation method including:
102, receiving a preset power supply signal and generating a trigger signal;
103, generating a corresponding input voltage signal according to the pulse characteristic information;
and 104, generating a partial discharge pulse sequence by adopting the input voltage signal and the trigger signal.
In the embodiment of the invention, based on the evaluation requirement of a user on whether the partial discharge tester can detect various partial discharge pulse types, a plurality of groups of initial information can be input through the partial discharge pulse sequence generation device to represent different partial discharge pulses, and corresponding pulse characteristic information is generated based on the plurality of groups of initial information to construct the basic waveform of each partial discharge pulse in the partial discharge pulse sequence.
Receiving a preset power supply signal through a partial discharge pulse sequence generating device, simulating a high voltage signal to generate a trigger signal so as to control the trigger time of the partial discharge pulse sequence, wherein the preset power supply signal can be commercial power; after the pulse characteristic signal and the trigger signal are generated, the partial discharge pulse sequence generation device determines the corresponding voltage of different partial discharge pulses in the pulse characteristic information according to the pulse characteristic information to generate a corresponding input voltage signal; and if the trigger signal is received, determining that the partial discharge pulse needs to be generated, and outputting a corresponding input voltage signal so as to generate a partial discharge pulse sequence.
The pulse characteristic information may be a piece of pulse characteristic information corresponding to multiple sets of initial information, or multiple pieces of pulse characteristic information corresponding to multiple sets of initial information, which is not limited in this embodiment of the present invention.
In the specific implementation, the local discharge pulse sequence generation method is applied to the local discharge pulse sequence generation device, and the controllable local discharge pulse sequence is generated through initial information input by a user and a commercial power-based simulation trigger signal, so that the local discharge in a real environment can be effectively simulated, and the test cost is reduced.
Referring to fig. 2, a flow chart of steps of an alternative embodiment of a partial discharge pulse sequence generation method is provided, which may include:
in an embodiment of the present invention, the initial information includes pulse amplitude, pulse polarity and pulse phase angle, and step 201 may include the following sub-steps a1-a 2:
a sub-step A1, receiving a plurality of sets of the pulse amplitude, the pulse polarity and the pulse phase angle input by a user, and determining a first target partial discharge map;
and a sub-step A2 of using the first target partial discharge map as pulse characteristic information.
In a specific implementation, the initial information may include a pulse amplitude, a pulse polarity, and a pulse phase angle, the partial discharge pulse sequence generating apparatus may include a first graphical interface, and a user may input multiple sets of pulse amplitudes, pulse polarities, and pulse phase angles on the first graphical interface to determine a required approximate shape of each pulse in the first target partial discharge map, and use the first target partial discharge map as pulse characteristic information to subsequently generate a corresponding partial discharge pulse sequence according to the pulse characteristic information.
Optionally, a pulse generation time input by a user may also be received by the partial discharge pulse sequence generation apparatus, so as to replace the pulse phase angle, which is not limited in this embodiment of the present invention.
In another embodiment of the present invention, the initial information includes selection information of a plurality of preset partial discharge maps, and the step 201 may include the following sub-steps B1-B2:
sub-step B1, receiving the selected information of the plurality of preset partial discharge maps from the user, and determining a second target partial discharge map;
and a sub-step B2 of using the second target partial discharge map as pulse characteristic information.
In a specific implementation, a partial discharge spectrum database may be disposed in the partial discharge generating device, and configured to store a plurality of preset partial discharge spectra, where the plurality of preset partial discharge spectra may include partial discharge spectra of different insulation defect models or a basic programmable calibration pulse sequence, which is not limited in this embodiment of the present invention.
In an embodiment of the present invention, the partial discharge pulse sequence generation apparatus may include a second graphical interface, and the second graphical interface may be connected to a partial discharge spectrum database. On the second graphical interface, a user can enter the partial discharge spectrum database, a required partial discharge spectrum is selected from a plurality of preset partial discharge spectrums, when the user selects one or more partial discharge spectrums in the partial discharge spectrum database, the partial discharge spectrum database can be used as a second target partial discharge spectrum, and the partial discharge pulse sequence generation device uses information carried on the second target partial discharge spectrum as pulse characteristic information.
in the embodiment of the present invention, the step 202 may include the following sub-steps 2021-2024:
substep 2021, receiving a preset power signal, performing a signal coupling operation, and generating a coupling signal;
substep 2022, low pass filtering said coupled signal to generate a sinusoidal synchronization signal;
substep 2023, comparing the sinusoidal synchronization signal with a preset direct current voltage signal to generate a square wave signal;
sub-step 2024, extracting the rising edge portion of the square wave signal, generating a trigger signal.
Optionally, after the local discharge pulse sequence generating device receives the preset power signal, in order to ensure the use safety of the user, an isolation transformer may be provided, and after receiving the preset power signal through the isolation transformer and performing a signal coupling operation, a coupling signal may be generated, where the preset power signal may be the commercial power. After the coupling signal is obtained, a low-pass filter is used for screening out high-frequency noise to form a sine synchronous signal; then, comparing the sine synchronous signal with a preset direct-current voltage signal through a comparator to generate a square wave signal; the rising edge part of the square wave signal can be extracted at this time to serve as a trigger signal for outputting different partial discharge pulses in each period.
Furthermore, the phase difference between the rising edge zero-crossing point of the trigger signal and the rising edge zero-crossing point of the synchronous signal can be changed by changing the direct-current reference voltage, so that the phase difference can be adjusted from 0 degree to 90 degrees.
In an alternative embodiment of the present invention, step 203 may include the following sub-steps 2031-2032:
substep 2031, detecting the pulse characteristic information, and determining a plurality of voltage amplitudes corresponding to the pulse characteristic information;
substep 2032, dividing the plurality of voltage amplitudes according to a preset power frequency cycle, and generating an input voltage signal.
In specific implementation, the pulse characteristic information is detected by the partial discharge pulse sequence generation device, for example, the voltage amplitudes of one or more partial discharge pulses are determined by the discharge map in the pulse characteristic information, and then a plurality of voltage amplitudes corresponding to the pulse characteristic information are determined, and then the plurality of voltage amplitudes are divided according to a preset power frequency cycle, so that the corresponding partial discharge pulses are not output in an overlapping manner, and a subsequent partial discharge tester is prevented from detecting errors.
Further, the step 104 in the above embodiment may be replaced by the following step 204 and 205:
in the embodiment of the invention, in the partial discharge pulse sequence, the input voltage signal is continuously input according to the time period, when the partial discharge pulse sequence generating device receives the trigger signal, the partial discharge pulse is required to be output, and the input voltage signal can be output in the form of narrow pulse within the duration time of the trigger signal.
In a specific implementation, the partial discharge pulse is usually generated in a high voltage form, and a tesla coil transformer is arranged in the partial discharge pulse sequence generation device, so that the partial discharge pulse sequence of the real environment can be simulated more effectively by outputting the output input voltage signal after boosting.
In the embodiment of the invention, a user can input initial information comprising pulse amplitude, pulse polarity and pulse phase angle or selection information of a plurality of preset partial discharge maps into a partial discharge pulse generation device, and determine the corresponding partial discharge map as pulse characteristic information according to the initial information; after receiving a preset power supply signal through an isolation transformer, obtaining a square wave signal through coupling, low-pass filtering and comparison with a preset direct-current voltage signal, and obtaining the rising edge of the square wave signal as a trigger signal; and determining a plurality of corresponding voltage amplitudes according to the pulse characteristic information to determine a corresponding input voltage signal, and when a trigger signal is received, boosting the input voltage signal and then outputting the boosted input voltage signal to generate a partial discharge pulse sequence. And further, the technical aims of effectively simulating the partial discharge pulse sequence of the real environment, reducing the test cost and reducing the size of equipment are achieved.
Referring to fig. 3, a circuit diagram of a tesla control module in an embodiment of the invention is shown.
In the embodiment of the invention, a base stage of the triode is connected in series with a capacitor with the size of 680pF, a resistor Rb with the size of 51k omega is connected between the base stage and the emitter in parallel, a collector is connected with an input voltage source and is connected in series with a resistor Rc with the size of 51k omega, and a capacitor with the size of 10pF and a load RL are connected between the collector and the emitter in series.
When the trigger pulse does not arrive, the avalanche transistor is cut off, the capacitor C (10pF) is charged under the action of the control input voltage V, the voltage of the charged capacitor C is approximately equal to the input voltage V, and when a large enough trigger pulse arrives, the operating point of the transistor moves to an unstable avalanche negative resistance region. Q1 avalanche breaks down, producing a rapidly increasing avalanche current, causing capacitor C (10pF) to rapidly discharge via transistor Q1, forming a narrow pulse on load RL. The narrow pulse obtained is again a higher peak value due to the large avalanche current. And because C (10pF) has limited stored charge, the capacitance is generally only a few picofarads to a few hundred picofarads. The pulse width is also limited. That is, after avalanche starts, the avalanche current, i.e. the capacitor discharge current, can only gradually increase to reach a certain peak value due to the influence of the transistor itself, i.e. the circuit distribution parameters, and the discharge current gradually decreases due to the decrease of the charge on the capacitor C (10 pF). The former forms the leading edge of the pulse, and the latter forms the trailing edge of the pulse, so that a subnanosecond UWB narrow pulse with short rise time can be obtained on the load. The embedded controller outputs a trigger signal and a control voltage signal to a Tesla coil circuit, generates a narrow pulse, and outputs the narrow pulse after the narrow pulse is boosted by a Tesla coil transformer.
The partial discharge pulse is output after the voltage is boosted by the tesla coil transformer because the input voltage generated according to the specific pulse characteristic information is combined with the trigger input instead of directly simulating the waveform output. The addition of the Tesla coil transformer ensures that the pulse controllability is kept in the process of generating the partial discharge pulse, and the randomness of the partial discharge is added, so that the method is more consistent with the process of generating the partial discharge in the actual generation process.
Referring to fig. 4, a flowchart of a partial discharge pulse sequence generation process according to an embodiment of the present invention is shown to generate the partial discharge pulse sequence shown in fig. 5, and a specific application flow may refer to the following embodiments.
The different types of defects have different statistical properties of pulse time distribution and amplitude distribution, which are due to the generation mechanism of partial discharges. This specificity can be used to classify and identify insulation defects, and discharge maps can be collected in three ways: partial discharge live detection, mathematical model-based digital simulation and typical defect-based simulation experiments. After collection, a Partial Discharge map (PRPD) database can be constructed, storing the waveform information of the Discharge pulses and the information of the Partial Discharge test (such as measuring circuits and instruments, test strips and applied voltages), and extracting the pulse characteristic information (amplitude, Phase and the like) of each pulse of the Partial Discharge pulse sequence.
When the system generates the PRPD map in an analog mode, the trigger signal is generated by a trigger signal analog module which is mainly used for simulating a high-voltage signal. The method comprises the steps that mains supply is coupled through an isolation transformer, coupled signals form sine synchronous signals after low-pass filtering, the sine synchronous signals are compared with a direct-current voltage to generate square wave signals, and the rising edges of the square waves are triggers output by each period of a discharge map. By changing the direct current reference voltage, the phase difference between the rising edge zero-crossing point of the trigger signal and the synchronous signal can be adjusted from 0 degree to 90 degrees. The analog "high voltage" signal then comes from the amplification of the trigger signal. The Tesla coil control module is controlled by the central control module, the trigger time is controlled based on the trigger signal, and the pulse amplitude is controlled based on the input voltage signal. The graphic module can comprise two parts, namely a first graphic interface sub-module and a second graphic interface sub-module, wherein initial information input by a user is received in the first graphic sub-module, or a PRPD map sequence is read from a database through the second graphic sub-module, after a partial discharge map is determined to be used as pulse characteristic information, the pulse characteristic information is divided into pulse segments according to a power frequency period, and the segments are output to be used as a reference source to control the Tesla coil control module to generate a partial discharge pulse sequence. The partial discharge pulse sequence and the high-voltage analog signal are received by the partial discharge tester, and the corresponding type and other information of the partial discharge pulse sequence can be detected in the partial discharge tester.
Referring to fig. 6, a block diagram of a partial discharge pulse sequence generating apparatus is provided, and the apparatus may include a trigger signal simulation module 602, a partial discharge map simulation module 601, and a tesla coil control module 604, which are electrically connected to the central control module 603, respectively;
the partial discharge map simulation module 601 is configured to obtain pulse characteristic information of each pulse in a pulse sequence to be processed;
the trigger signal simulation module 602 is configured to receive a preset power signal and generate a trigger signal;
the central control module 603 is configured to generate a corresponding input voltage signal according to the pulse characteristic information;
the tesla coil control module 604 is configured to generate a partial discharge pulse sequence by using the input voltage signal and the trigger signal.
Optionally, the initial information includes a pulse amplitude, a pulse polarity, and a pulse phase angle, and the partial discharge map simulation module 601 includes:
the first graphical interface sub-module is used for receiving a plurality of groups of pulse amplitudes, pulse polarities and pulse phase angles input by a user and determining a first target partial discharge map; and adopting the first target partial discharge map as pulse characteristic information.
Optionally, the initial information includes selection information of the preset partial discharge maps, and the partial discharge map simulation module 601 includes:
the local discharge map database is used for storing the plurality of preset local discharge maps;
the second graphical interface submodule is used for receiving the selected information of the user on the plurality of preset partial discharge maps and determining a second target partial discharge map; and adopting the second target partial discharge map as pulse characteristic information.
In an embodiment of the present invention, the trigger signal simulation module 602 includes:
the isolation transformation submodule is used for receiving a preset power supply signal and generating a coupling signal after executing signal coupling operation;
the low-pass filtering submodule is used for carrying out low-pass filtering on the coupling signal to generate a sine synchronous signal;
the comparison submodule is used for comparing the sinusoidal synchronous signal with a preset direct-current voltage signal to generate a square wave signal;
and the trigger signal generation submodule is used for extracting the rising edge part of the square wave signal and generating a trigger signal.
In another embodiment of the present invention, the central control module 603 includes:
the voltage amplitude determining submodule is used for detecting the pulse characteristic information and determining a plurality of voltage amplitudes corresponding to the pulse characteristic information;
and the input voltage generation submodule is used for dividing the plurality of voltage amplitudes according to a preset power frequency cycle to generate an input voltage signal.
Further, the tesla coil control module 604 includes:
the input voltage signal output submodule is used for outputting the input voltage signal when the trigger signal is received;
and the partial discharge pulse sequence generation submodule is used for boosting the input voltage signal to generate a partial discharge pulse sequence.
It is clear to those skilled in the art that, for convenience and brevity of description, the specific working processes of the above-described apparatuses and units may refer to the corresponding processes in the foregoing method embodiments, and are not described herein again.
In the embodiments provided in the present invention, it should be understood that the disclosed apparatus and method may be implemented in other ways. For example, the above-described apparatus embodiments are merely illustrative, and for example, the division of the units is only one logical division, and other divisions may be realized in practice, for example, a plurality of units or components may be combined or integrated into another system, or some features may be omitted, or not executed. In addition, the shown or discussed mutual coupling or direct coupling or communication connection may be an indirect coupling or communication connection through some interfaces, devices or units, and may be in an electrical, mechanical or other form.
The units described as separate parts may or may not be physically separate, and parts displayed 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 can be selected according to actual needs to achieve the purpose of the solution of the embodiment.
In addition, functional units in the embodiments of the present invention may be integrated into one processing unit, or each unit may exist alone physically, or two or more units are integrated into one unit. The integrated unit can be realized in a form of hardware, and can also be realized in a form of a software functional unit.
The integrated unit, if implemented in the form of a software functional unit and sold or used as a stand-alone product, may be stored in a computer readable storage medium. Based on such understanding, the technical solution of the present invention may be embodied in the form of a software product, which is stored in a storage medium and includes instructions for causing a computer device (which may be a personal computer, a server, or a network device) to execute all or part of the steps of the method according to the embodiments of the present invention. And the aforementioned storage medium includes: a U-disk, a removable hard disk, a Read-only Memory (ROM), a Random Access Memory (RAM), a magnetic disk or an optical disk, and other various media capable of storing program codes.
The above-mentioned embodiments are only used for illustrating the technical solutions of the present invention, and not for limiting the same; although the present invention 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 solutions described in the foregoing embodiments may still be modified, or some technical features may be equivalently replaced; and such modifications or substitutions do not depart from the spirit and scope of the corresponding technical solutions of the embodiments of the present invention.
Claims (10)
1. A method of generating a sequence of partial discharge pulses, the method comprising:
acquiring pulse characteristic information of each pulse in a pulse sequence to be processed;
receiving a preset power supply signal and generating a trigger signal;
generating a corresponding input voltage signal according to the pulse characteristic information;
and generating a partial discharge pulse sequence by using the input voltage signal and the trigger signal.
2. The method of claim 1, wherein the initial information comprises pulse amplitude, pulse polarity, and pulse phase angle, and the step of obtaining pulse characteristic information of each pulse in the pulse sequence to be processed comprises:
receiving a plurality of groups of pulse amplitudes, pulse polarities and pulse phase angles input by a user, and determining a first target partial discharge map;
and adopting the first target partial discharge map as pulse characteristic information.
3. The method according to claim 1, wherein the initial information includes selection information of a plurality of preset partial discharge maps, and the step of obtaining pulse characteristic information of each pulse in the pulse sequence to be processed includes:
receiving selected information of the plurality of preset partial discharge maps from a user, and determining a second target partial discharge map;
and adopting the second target partial discharge map as pulse characteristic information.
4. The method of claim 1, wherein the step of receiving a preset power signal and generating a trigger signal comprises:
receiving a preset power supply signal, and generating a coupling signal after executing signal coupling operation;
low-pass filtering the coupling signal to generate a sine synchronous signal;
comparing the sinusoidal synchronous signal with a preset direct-current voltage signal to generate a square wave signal;
and extracting a rising edge part of the square wave signal to generate a trigger signal.
5. The method of claim 2 or 3, wherein the step of generating the corresponding input voltage signal according to the pulse characteristic information comprises:
detecting the pulse characteristic information, and determining a plurality of voltage amplitudes corresponding to the pulse characteristic information;
and dividing the plurality of voltage amplitudes according to a preset power frequency period to generate an input voltage signal.
6. The method of claim 5, wherein the step of generating a sequence of partial discharge pulses using the input voltage signal and the trigger signal comprises:
when the trigger signal is received, outputting the input voltage signal;
and boosting the input voltage signal to generate a partial discharge pulse sequence.
7. A partial discharge pulse sequence generation device is characterized by comprising a trigger signal simulation module, a partial discharge map simulation module and a Tesla coil control module which are respectively and electrically connected with a central control module;
the partial discharge map simulation module is used for acquiring pulse characteristic information of each pulse in a pulse sequence to be processed;
the trigger signal simulation module is used for receiving a preset power supply signal and generating a trigger signal;
the central control module is used for generating a corresponding input voltage signal according to the pulse characteristic information;
the Tesla coil control module is used for generating a partial discharge pulse sequence by adopting the input voltage signal and the trigger signal.
8. The method of claim 7, wherein the initial information comprises pulse amplitude, pulse polarity, and pulse phase angle, and wherein the partial discharge pattern simulation module comprises:
the first graphical interface sub-module is used for receiving a plurality of groups of pulse amplitudes, pulse polarities and pulse phase angles input by a user and determining a first target partial discharge map; and adopting the first target partial discharge map as pulse characteristic information.
9. The method of claim 7, wherein the initial information includes selection information of the plurality of preset partial discharge maps, and the partial discharge map simulation module includes:
the local discharge map database is used for storing the plurality of preset local discharge maps;
the second graphical interface submodule is used for receiving the selected information of the user on the plurality of preset partial discharge maps and determining a second target partial discharge map; and adopting the second target partial discharge map as pulse characteristic information.
10. The method of claim 7, wherein the trigger signal simulation module comprises:
the isolation transformation submodule is used for receiving a preset power supply signal and generating a coupling signal after executing signal coupling operation;
the low-pass filtering submodule is used for carrying out low-pass filtering on the coupling signal to generate a sine synchronous signal;
the comparison submodule is used for comparing the sinusoidal synchronous signal with a preset direct-current voltage signal to generate a square wave signal;
and the trigger signal generation submodule is used for extracting the rising edge part of the square wave signal and generating a trigger signal.
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