CN114089156B - Method and device for testing effectiveness of overvoltage protection function of power module hardware - Google Patents
Method and device for testing effectiveness of overvoltage protection function of power module hardware Download PDFInfo
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- CN114089156B CN114089156B CN202111279301.9A CN202111279301A CN114089156B CN 114089156 B CN114089156 B CN 114089156B CN 202111279301 A CN202111279301 A CN 202111279301A CN 114089156 B CN114089156 B CN 114089156B
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- 238000012360 testing method Methods 0.000 title claims abstract description 36
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- 239000003990 capacitor Substances 0.000 claims abstract description 38
- 238000004891 communication Methods 0.000 claims abstract description 35
- 239000013307 optical fiber Substances 0.000 claims abstract description 30
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- 230000008569 process Effects 0.000 abstract description 7
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
- G01R31/00—Arrangements for testing electric properties; Arrangements for locating electric faults; Arrangements for electrical testing characterised by what is being tested not provided for elsewhere
- G01R31/28—Testing of electronic circuits, e.g. by signal tracer
- G01R31/2832—Specific tests of electronic circuits not provided for elsewhere
- G01R31/2836—Fault-finding or characterising
- G01R31/2837—Characterising or performance testing, e.g. of frequency response
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
- G01R31/00—Arrangements for testing electric properties; Arrangements for locating electric faults; Arrangements for electrical testing characterised by what is being tested not provided for elsewhere
- G01R31/28—Testing of electronic circuits, e.g. by signal tracer
- G01R31/2832—Specific tests of electronic circuits not provided for elsewhere
- G01R31/2836—Fault-finding or characterising
- G01R31/2849—Environmental or reliability testing, e.g. burn-in or validation tests
Abstract
The invention discloses a method and a device for testing the effectiveness of a power module hardware overvoltage protection function, wherein the method comprises the following steps: modifying the software overvoltage protection fixed value of the power module to be tested to be larger than the hardware overvoltage protection fixed value; after the capacitance voltage value of the power module to be tested is increased to a first preset voltage value, disconnecting the downlink communication optical fiber, and acquiring the bypass state and the capacitance voltage value in real time; when the power module to be tested is in a bypass state and the capacitor voltage value is reduced until the power module to be tested is powered down, acquiring the hardware condition and the bypass switch state of the power module to be tested; and when the hardware is not damaged and the bypass switch state is in a closed state, judging that the hardware overvoltage protection function of the power module to be tested is normal. The invention tests the effectiveness of the hardware overvoltage protection function of the power module, and can avoid that the power module cannot be effectively bypassed through the hardware overvoltage protection function when the capacitance voltage value of the power module is overlarge in the operation process.
Description
Technical Field
The invention relates to the technical field of overvoltage protection, in particular to a method and a device for testing the effectiveness of a power module hardware overvoltage protection function.
Background
In order to avoid the problem that the flexible direct current converter valve is abnormal in operation due to damage to the power module caused by overlarge capacitance voltage value of the power module in the flexible direct current converter valve in the operation process of the flexible direct current converter valve, a software overvoltage protection function and a hardware overvoltage protection function configured on the power module are generally adopted, and the power module is bypassed in time when the capacitance voltage value of the power module is overlarge. When the capacitance voltage value of a certain power module in the flexible direct current converter valve is overlarge, the software overvoltage protection function configured on the power module takes effect, the power module is bypassed, and when the software overvoltage protection function fails and the capacitance voltage value of the power module exceeds the hardware overvoltage protection fixed value, the hardware overvoltage protection function configured on the power module takes effect, and the power module is bypassed.
Therefore, in order to ensure that when the capacitance voltage value of the power module is too large and the software overvoltage protection function configured on the power module fails, the power module can be bypassed by the hardware overvoltage protection function configured on the power module, and it is necessary to test the validity of the hardware overvoltage protection function of the power module in advance.
Disclosure of Invention
The invention provides a method and a device for testing the effectiveness of a power module hardware overvoltage protection function, which are used for solving the problem that the prior art lacks a method for testing the effectiveness of the power module hardware overvoltage protection function.
In order to solve the above technical problems, a first aspect of the present invention provides a method for testing the validity of a hardware overvoltage protection function of a power module, including:
modifying a software overvoltage protection fixed value of the power module to be tested according to a preset hardware overvoltage protection fixed value of the power module to be tested, so that the software overvoltage protection fixed value is larger than the hardware overvoltage protection fixed value;
charging the power module to be tested, and increasing the capacitance voltage value of the power module to be tested to a first preset voltage value;
after the capacitor voltage value is increased to the first preset voltage value, disconnecting a downlink communication optical fiber between a valve control system and the power module to be tested, and acquiring a bypass state and the capacitor voltage value of the power module to be tested in real time;
judging whether the power module to be tested is in a bypass state or not according to the bypass state and the capacitance voltage value, and judging whether the capacitance voltage value of the power module to be tested is reduced or not until the power module to be tested is powered down;
when the power module to be tested is in a bypass state and the capacitance voltage value of the power module to be tested is reduced until the power module to be tested is powered down, acquiring the hardware condition and the bypass switch state of the power module to be tested;
judging whether the hardware of the power module to be tested is damaged or not according to the hardware condition and the bypass switch state, and judging whether the bypass switch state is a closed state or not;
and when the hardware of the power module to be tested is not damaged and the bypass switch state is in a closed state, judging that the overvoltage protection function of the hardware of the power module to be tested is normal.
As an improvement, the step of acquiring the bypass state and the capacitance voltage value of the power module to be tested in real time specifically includes:
and acquiring a bypass state and a capacitance voltage value sent by the power module to be tested through the uplink communication optical fiber in real time through the valve control system.
As an improvement, after the capacitor voltage value is increased to the first preset voltage value, the downstream communication optical fiber between the valve control system and the power module to be tested is disconnected, specifically:
and after the capacitor voltage value is increased to the first preset voltage value, and under the condition that the capacitor voltage value of the power module to be tested is within a first preset voltage value range, disconnecting the downlink communication optical fiber between the valve control system and the power module to be tested.
As an improvement, the charging the power module to be tested increases the capacitance voltage value of the power module to be tested to a first preset voltage value, specifically:
based on a preset charging loop, the power modules to be tested are charged by controlling the number of the power modules except the power modules to be tested in the charging loop, and the capacitance voltage value of the power modules to be tested is increased to a first preset voltage value, wherein the charging loop is formed by connecting a power module, the power modules to be tested, at least one power module except the power modules to be tested and an inductance module in series.
As an improvement, the modifying the software overvoltage protection fixed value of the power module to be tested according to the preset hardware overvoltage protection fixed value of the power module to be tested specifically includes:
acquiring software overvoltage protection program codes of a power module to be tested, wherein the software overvoltage protection program codes comprise assignment codes for assigning a software overvoltage protection fixed value of the power module to be tested;
modifying the assignment code according to a preset hardware overvoltage protection fixed value of a power module to be tested so that the software overvoltage protection fixed value is larger than the hardware overvoltage protection fixed value;
and writing the software overvoltage protection program code after modifying the assignment code into a control chip of the power module to be tested.
A second aspect of the embodiment of the present invention provides a device for testing the validity of a power module hardware overvoltage protection function, including:
the software overvoltage protection fixed value modification module is used for modifying the software overvoltage protection fixed value of the power module to be tested according to the preset hardware overvoltage protection fixed value of the power module to be tested so that the software overvoltage protection fixed value is larger than the hardware overvoltage protection fixed value;
the charging module is used for charging the power module to be tested and increasing the capacitance voltage value of the power module to be tested to a first preset voltage value;
the first data acquisition module is used for disconnecting the downlink communication optical fiber between the valve control system and the power module to be tested after the capacitor voltage value is increased to the first preset voltage value, and acquiring the bypass state and the capacitor voltage value of the power module to be tested in real time;
the first data processing module is used for judging whether the power module to be tested is in a bypass state or not according to the bypass state and the capacitance voltage value, and whether the capacitance voltage value of the power module to be tested is reduced or not until the power module to be tested is powered down;
the second data acquisition module is used for acquiring the hardware condition and the bypass switch state of the power module to be tested when the power module to be tested is in the bypass state and the capacitance voltage value of the power module to be tested is reduced until the power module to be tested is powered down;
the second data processing module is used for judging whether the hardware of the power module to be tested is damaged or not according to the hardware condition and the bypass switch state, and whether the bypass switch state is in a closed state or not;
and the test result output module is used for judging that the overvoltage protection function of the hardware of the power module to be tested is normal when the hardware of the power module to be tested is not damaged and the bypass switch state is in a closed state.
As an improvement, the first data obtaining module is configured to obtain, in real time, a bypass state and a capacitance voltage value of the power module to be tested, specifically:
and acquiring a bypass state and a capacitance voltage value sent by the power module to be tested through the uplink communication optical fiber in real time through the valve control system.
As an improvement, the first data acquisition module is configured to disconnect the downstream communication optical fiber between the valve control system and the power module to be tested after the capacitor voltage value is raised to the first preset voltage value, and specifically includes:
and after the capacitor voltage value is increased to the first preset voltage value, and under the condition that the capacitor voltage value of the power module to be tested is within a first preset voltage value range, disconnecting the downlink communication optical fiber between the valve control system and the power module to be tested.
As an improvement, the charging module is configured to charge the power module to be tested, raise the capacitance voltage value of the power module to be tested to a first preset voltage value, and specifically is:
based on a preset charging loop, the power modules to be tested are charged by controlling the number of the power modules except the power modules to be tested in the charging loop, and the capacitance voltage value of the power modules to be tested is increased to a first preset voltage value, wherein the charging loop is formed by connecting a power module, the power modules to be tested, at least one power module except the power modules to be tested and an inductance module in series.
As an improvement, the software overvoltage protection constant value modification module is configured to modify a software overvoltage protection constant value of a power module to be tested according to a preset hardware overvoltage protection constant value of the power module to be tested, and specifically includes:
acquiring software overvoltage protection program codes of a power module to be tested, wherein the software overvoltage protection program codes comprise assignment codes for assigning a software overvoltage protection fixed value of the power module to be tested;
modifying the assignment code according to a preset hardware overvoltage protection fixed value of a power module to be tested so that the software overvoltage protection fixed value is larger than the hardware overvoltage protection fixed value;
and writing the software overvoltage protection program code after modifying the assignment code into a control chip of the power module to be tested.
Compared with the prior art, the method for testing the validity of the hardware overvoltage protection function of the power module has the advantages that the validity of the hardware overvoltage protection function of the power module is tested in advance through the method for testing the validity of the hardware overvoltage protection function of the power module, and the problem that the power module cannot be effectively bypassed through the hardware overvoltage protection function when the capacitance voltage value of the power module in the operation process is too large can be avoided.
Drawings
Fig. 1 is a flow chart of a method for testing the effectiveness of a power module hardware overvoltage protection function according to an embodiment of the present invention;
fig. 2 is a schematic structural diagram of a testing device for the effectiveness of the overvoltage protection function of the hardware of the power module according to the embodiment of the present invention.
Detailed Description
The following description of the embodiments of the present invention will be made clearly and completely with reference to the accompanying drawings, in which it is apparent that the embodiments described are only some embodiments of the present invention, but not all embodiments. All other embodiments, which can be made by those skilled in the art based on the embodiments of the invention without making any inventive effort, are intended to be within the scope of the invention.
Referring to fig. 1, a first aspect of the present invention provides a method for testing the effectiveness of a hardware overvoltage protection function of a power module, including steps S1 to S7, specifically including the following steps:
step S1, modifying a software overvoltage protection fixed value of a power module to be tested according to a preset hardware overvoltage protection fixed value of the power module to be tested, so that the software overvoltage protection fixed value is larger than the hardware overvoltage protection fixed value.
Specifically, when the capacitance voltage value of a certain power module in the flexible direct current converter valve is too large, in order to better protect the hardware of the power module, the software overvoltage protection function configured on the power module is usually validated, and the power module is bypassed, so that the software overvoltage protection fixed value is usually smaller than the hardware overvoltage protection fixed value, and therefore, in order to test the effectiveness of the hardware overvoltage protection function of the power module to be tested, the software overvoltage protection fixed value of the power module to be tested needs to be modified according to the preset hardware overvoltage protection fixed value of the power module to be tested, so that the software overvoltage protection fixed value is larger than the hardware overvoltage protection fixed value.
It should be noted that, in the embodiment of the present invention, the voltage range that the power module to be tested can bear and the original software overvoltage protection constant value of the power module to be tested are comprehensively considered, and the hardware overvoltage protection constant value of the power module to be tested is preset.
As an improvement, the software overvoltage protection constant value modification module is configured to modify a software overvoltage protection constant value of a power module to be tested according to a preset hardware overvoltage protection constant value of the power module to be tested, and specifically includes:
acquiring software overvoltage protection program codes of a power module to be tested, wherein the software overvoltage protection program codes comprise assignment codes for assigning a software overvoltage protection fixed value of the power module to be tested;
modifying the assignment code according to a preset hardware overvoltage protection fixed value of a power module to be tested so that the software overvoltage protection fixed value is larger than the hardware overvoltage protection fixed value;
and writing the software overvoltage protection program code after modifying the assignment code into a control chip of the power module to be tested.
Specifically, the control chip is a CPLD chip of a power module control board card of a power module to be tested, the software overvoltage protection program code is stored in the CPLD chip of the power module control board card of the power module to be tested, and the software overvoltage protection program code comprises a code for assigning a software overvoltage protection fixed value of the power module to be tested, so that after the software overvoltage protection program code is obtained, the part of the code for assigning the software overvoltage protection fixed value is directly modified, and then the modified software overvoltage protection program code is rewritten in the CPLD chip of the power module control board card.
And S2, charging the power module to be tested, and increasing the capacitance voltage value of the power module to be tested to a first preset voltage value.
Specifically, after the software overvoltage protection fixed value of the power module to be tested is modified, the power module to be tested needs to be charged to run, and the capacitance voltage value of the power module to be tested is increased to a first preset voltage value, wherein in order to ensure that the power module to be tested runs normally, the first preset voltage value should not be lower than the rated voltage value of the power module to be tested in the actual running process.
As an improvement, the charging the power module to be tested increases the capacitance voltage value of the power module to be tested to a first preset voltage value, specifically:
based on a preset charging loop, the power modules to be tested are charged by controlling the number of the power modules except the power modules to be tested in the charging loop, and the capacitance voltage value of the power modules to be tested is increased to a first preset voltage value, wherein the charging loop is formed by connecting a power module, the power modules to be tested, at least one power module except the power modules to be tested and an inductance module in series.
Specifically, in the embodiment of the invention, an alternating-current voltage source, a plurality of power modules (including the power module to be tested) and a reactor are connected in series to form a charging loop, and the capacitance voltage value of the power module to be tested can be charged to a first preset voltage value by controlling the input/cut-off of the power module.
And step S3, after the capacitor voltage value is increased to the first preset voltage value, disconnecting the downlink communication optical fiber between the valve control system and the power module to be tested, and acquiring the bypass state of the power module to be tested and the capacitor voltage value in real time.
Specifically, in the embodiment of the invention, after the capacitor voltage value is increased to the first preset voltage value, that is, after the power module to be predicted normally operates, the downlink communication optical fiber between the valve control system and the power module to be tested is disconnected, so that the power module control board card detects the downlink communication fault between the valve control system and the power module to be tested, and the whole power module to be tested is locked. After the power module to be tested is locked, charging is carried out under the action of forward running current, the capacitance voltage value of the power module to be tested is rapidly increased to exceed the hardware overvoltage protection fixed value of the power module to be tested, at the moment, the hardware overvoltage protection function of the power module control board takes effect, and the power module control board issues a bypass switch closing instruction to close the bypass switch of the power module to be tested. And after the hardware overvoltage protection function is effective, acquiring the bypass state and the capacitance voltage value of the power module to be tested in real time.
As an improvement, the step of acquiring the bypass state and the capacitance voltage value of the power module to be tested in real time specifically includes:
and acquiring a bypass state and a capacitance voltage value sent by the power module to be tested through the uplink communication optical fiber in real time through the valve control system.
Specifically, a power module control board card in the power module is provided with a charged voltage sampling loop, capacitance voltage value sampling of the power module can be carried out, the power module control board card sends the capacitance voltage value obtained by sampling to the valve control system through an uplink communication optical fiber, in addition, a bypass switch feeds a bypass state back to the power module control board card after being closed, and the power module control board card sends the bypass state to the valve control system through the uplink communication optical fiber. Therefore, the bypass state and the capacitance voltage value sent by the power module to be tested through the uplink communication optical fiber are obtained in real time through the valve control system.
As an improvement, after the capacitor voltage value is increased to the first preset voltage value, the downstream communication optical fiber between the valve control system and the power module to be tested is disconnected, specifically:
and after the capacitor voltage value is increased to the first preset voltage value, and under the condition that the capacitor voltage value of the power module to be tested is within a first preset voltage value range, disconnecting the downlink communication optical fiber between the valve control system and the power module to be tested.
It should be noted that, the voltage value included in the first preset voltage value range is a voltage value similar to the rated voltage value of the power module to be tested in the actual operation process.
Specifically, when the capacitance voltage value of the power module to be tested is within the first preset voltage value range, that is, the capacitance voltage value of the power module to be tested is stabilized near the rated voltage value, which means that the operation of the power module to be tested has reached a stable state, then the downstream communication optical fiber between the valve control system and the power module to be tested is disconnected at a preset moment, for example, a tester manually disconnects the downstream communication optical fiber between the valve control system and the power module to be tested at a preset moment, so that the control board card of the power module to be tested detects that the module to be tested has a downstream communication fault, and then the power module to be tested is locked.
And S4, judging whether the power module to be tested is in a bypass state or not according to the bypass state and the capacitance voltage value, and judging whether the capacitance voltage value of the power module to be tested is reduced or not until the power module to be tested is powered down.
Specifically, according to the bypass state and the capacitance voltage value obtained in real time, the change condition of the bypass state and the capacitance voltage value can be obtained.
It should be noted that after the power module to be tested is powered down, its uplink communication will be interrupted, and the valve control system cannot continuously obtain the information sent by the power module to be tested, so that whether the power module to be tested has been powered down can be determined according to whether the uplink communication of the power module to be tested is interrupted.
And S5, when the power module to be tested is in a bypass state and the capacitance voltage value of the power module to be tested is reduced until the power module to be tested is powered down, acquiring the hardware condition and the bypass switch state of the power module to be tested.
Specifically, when the power module to be tested is in a bypass state and the capacitance voltage value of the power module to be tested is reduced until the power module to be tested is powered down, the power module to be tested is cut off from the main loop of the flexible direct current converter valve in a bypass mode, and in order to ensure the accuracy of testing the validity of the hardware overvoltage protection function of the power module to be tested, the hardware condition and the bypass switch state of the power module to be tested need to be further obtained, for example, a tester is powered down at the power module to be tested, and after the safety is ensured, the power module to be tested enters a testing site to check the hardware condition and the bypass switch state of the power module to be tested in the field.
It should be noted that, when the power module to be tested is not in the bypass state and the capacitor voltage value of the power module to be tested is not continuously reduced, the power module to be tested is powered down, which indicates that the hardware overvoltage protection function of the power module to be tested fails, and the hardware overvoltage protection function of the power module to be tested is determined to be abnormal.
And S6, judging whether the hardware of the power module to be tested is damaged or not according to the hardware condition and the bypass switch state, and judging whether the bypass switch state is in a closed state or not.
Specifically, the hardware conditions include, but are not limited to, a case damage condition of the power module to be tested, an appearance damage condition of the internal components, a shape deformation condition, and loosening, falling, and shifting conditions of the internal components. According to the embodiment of the invention, whether the hardware of the power module to be tested is damaged or not can be judged according to the hardware condition and the bypass switch state, whether the bypass switch state is in the closed state or not can be judged, and whether the overvoltage protection function of the hardware of the power module to be tested is normal or not can be obtained according to the judging result.
And S7, when the hardware of the power module to be tested is not damaged and the bypass switch state is in a closed state, judging that the overvoltage protection function of the hardware of the power module to be tested is normal.
Specifically, the condition that the hardware of the power module to be tested is not damaged includes, but is not limited to, that the appearance and the shape of all components in the shell and the interior of the power module to be tested are not damaged or deformed normally, and each component is not loosened, separated or deviated. When the hardware of the power module to be tested is not damaged and the bypass switch state is in the closed state, the condition that the power module to be tested effectively bypasses through the hardware overvoltage protection function and is damaged due to overlarge capacitor voltage is avoided is indicated, and the hardware overvoltage protection function of the power module to be tested is judged to be normal.
It should be noted that, when the hardware of the power module to be tested is damaged and/or the bypass switch state is in the on state, it is indicated that the overvoltage protection function of the hardware of the power module to be tested fails, or the power module to be tested cannot ensure that the hardware of the power module to be tested is not damaged due to the overlarge capacitor voltage through the overvoltage protection function of the hardware of the power module to be tested, so that the overvoltage protection function of the hardware of the power module to be tested is abnormal.
By adopting the method for testing the validity of the hardware overvoltage protection function of the power module, which is provided by the embodiment of the invention, the validity of the hardware overvoltage protection function of the power module is tested in advance, so that the problem that the power module cannot be effectively bypassed through the hardware overvoltage protection function when the capacitance voltage value of the power module is overlarge in the operation process can be avoided.
Referring to fig. 2, a second aspect of the embodiment of the present invention provides a device for testing the effectiveness of a hardware overvoltage protection function of a power module, including:
the software overvoltage protection fixed value modification module 201 is configured to modify a software overvoltage protection fixed value of a power module to be tested according to a preset hardware overvoltage protection fixed value of the power module to be tested, so that the software overvoltage protection fixed value is greater than the hardware overvoltage protection fixed value;
the charging module 202 is configured to charge the power module to be tested, and raise the capacitance voltage value of the power module to be tested to a first preset voltage value;
the first data obtaining module 203 is configured to disconnect a downlink communication optical fiber between the valve control system and the power module to be tested after the capacitor voltage value is increased to the first preset voltage value, and obtain a bypass state and the capacitor voltage value of the power module to be tested in real time;
the first data processing module 204 is configured to determine, according to the bypass state and the capacitor voltage value, whether the power module to be tested is in the bypass state, and whether the capacitor voltage value of the power module to be tested is reduced until the power module to be tested is powered down;
the second data obtaining module 205 is configured to obtain a hardware condition and a bypass switch state of the power module to be tested when the power module to be tested is in a bypass state and a capacitance voltage value of the power module to be tested is reduced until the power module to be tested is powered down;
the second data processing module 206 is configured to determine whether the hardware of the power module to be tested is damaged according to the hardware status and the bypass switch status, and whether the bypass switch status is a closed status;
and the test result output module 207 is configured to determine that the overvoltage protection function of the hardware of the power module to be tested is normal when the hardware of the power module to be tested is not damaged and the bypass switch state is in a closed state.
As an improvement, the first data obtaining module 203 is configured to obtain, in real time, a bypass state and a capacitance voltage value of the power module to be tested, specifically:
and acquiring a bypass state and a capacitance voltage value sent by the power module to be tested through the uplink communication optical fiber in real time through the valve control system.
As an improvement, the first data obtaining module 203 is configured to disconnect the downstream communication optical fiber between the valve control system and the power module to be tested after the capacitor voltage value is increased to the first preset voltage value, specifically:
and after the capacitor voltage value is increased to the first preset voltage value, and under the condition that the capacitor voltage value of the power module to be tested is within a first preset voltage value range, disconnecting the downlink communication optical fiber between the valve control system and the power module to be tested.
As an improvement, the charging module 202 is configured to charge the power module to be tested, and raise the capacitance voltage value of the power module to be tested to a first preset voltage value, specifically:
based on a preset charging loop, the power modules to be tested are charged by controlling the number of the power modules except the power modules to be tested in the charging loop, and the capacitance voltage value of the power modules to be tested is increased to a first preset voltage value, wherein the charging loop is formed by connecting a power module, the power modules to be tested, at least one power module except the power modules to be tested and an inductance module in series.
As an improvement, the software overvoltage protection constant value modification module 201 is configured to modify a software overvoltage protection constant value of a power module to be tested according to a preset hardware overvoltage protection constant value of the power module to be tested, and specifically includes:
acquiring software overvoltage protection program codes of a power module to be tested, wherein the software overvoltage protection program codes comprise assignment codes for assigning a software overvoltage protection fixed value of the power module to be tested;
modifying the assignment code according to a preset hardware overvoltage protection fixed value of a power module to be tested so that the software overvoltage protection fixed value is larger than the hardware overvoltage protection fixed value;
and writing the software overvoltage protection program code after modifying the assignment code into a control chip of the power module to be tested.
It should be noted that, the device for testing the validity of the overvoltage protection function of the hardware of the power module provided by the embodiment of the present invention can implement all the processes of the method for testing the validity of the overvoltage protection function of the hardware of the power module described in any one of the embodiments, and the functions and the implemented technical effects of each module in the device are respectively the same as those of the method for testing the validity of the overvoltage protection function of the hardware of the power module described in the embodiment, and are not repeated herein.
While the foregoing is directed to the preferred embodiments of the present invention, it will be appreciated by those skilled in the art that changes and modifications may be made without departing from the principles of the invention, such changes and modifications are also intended to be within the scope of the invention.
Claims (10)
1. The method for testing the effectiveness of the overvoltage protection function of the power module hardware is characterized by comprising the following steps of:
modifying a software overvoltage protection fixed value of the power module to be tested according to a preset hardware overvoltage protection fixed value of the power module to be tested, so that the software overvoltage protection fixed value is larger than the hardware overvoltage protection fixed value;
charging the power module to be tested, and increasing the capacitance voltage value of the power module to be tested to a first preset voltage value;
after the capacitor voltage value is increased to the first preset voltage value, disconnecting a downlink communication optical fiber between a valve control system and the power module to be tested, and acquiring a bypass state and the capacitor voltage value of the power module to be tested in real time;
judging whether the power module to be tested is in a bypass state or not according to the bypass state and the capacitance voltage value, and judging whether the capacitance voltage value of the power module to be tested is reduced or not until the power module to be tested is powered down;
when the power module to be tested is in a bypass state and the capacitance voltage value of the power module to be tested is reduced until the power module to be tested is powered down, acquiring the hardware condition and the bypass switch state of the power module to be tested;
judging whether the hardware of the power module to be tested is damaged or not according to the hardware condition and the bypass switch state, and judging whether the bypass switch state is a closed state or not;
and when the hardware of the power module to be tested is not damaged and the bypass switch state is in a closed state, judging that the overvoltage protection function of the hardware of the power module to be tested is normal.
2. The method for testing the effectiveness of the overvoltage protection function of the hardware of the power module according to claim 1, wherein the step of obtaining the bypass state and the capacitance voltage value of the power module to be tested in real time is specifically as follows:
and acquiring a bypass state and a capacitance voltage value sent by the power module to be tested through the uplink communication optical fiber in real time through the valve control system.
3. The method for testing the validity of the overvoltage protection function of the hardware of the power module according to claim 2, wherein after the capacitor voltage value is raised to the first preset voltage value, disconnecting a downstream communication optical fiber between the valve control system and the power module to be tested, specifically:
and after the capacitor voltage value is increased to the first preset voltage value, and under the condition that the capacitor voltage value of the power module to be tested is within a first preset voltage value range, disconnecting the downlink communication optical fiber between the valve control system and the power module to be tested.
4. The method for testing the effectiveness of the overvoltage protection function of the hardware of the power module according to claim 3, wherein the step of charging the power module to be tested increases the capacitance voltage value of the power module to be tested to a first preset voltage value comprises the following steps:
based on a preset charging loop, the power modules to be tested are charged by controlling the number of the power modules except the power modules to be tested in the charging loop, and the capacitance voltage value of the power modules to be tested is increased to a first preset voltage value, wherein the charging loop is formed by connecting a power module, the power modules to be tested, at least one power module except the power modules to be tested and an inductance module in series.
5. The method for testing the validity of the hardware overvoltage protection function of the power module according to claim 4, wherein the modifying the software overvoltage protection constant of the power module to be tested according to the preset hardware overvoltage protection constant of the power module to be tested specifically comprises:
acquiring software overvoltage protection program codes of a power module to be tested, wherein the software overvoltage protection program codes comprise assignment codes for assigning a software overvoltage protection fixed value of the power module to be tested;
modifying the assignment code according to a preset hardware overvoltage protection fixed value of a power module to be tested so that the software overvoltage protection fixed value is larger than the hardware overvoltage protection fixed value;
and writing the software overvoltage protection program code after modifying the assignment code into a control chip of the power module to be tested.
6. The utility model provides a testing arrangement of power module hardware overvoltage protection function validity which characterized in that includes:
the software overvoltage protection fixed value modification module is used for modifying the software overvoltage protection fixed value of the power module to be tested according to the preset hardware overvoltage protection fixed value of the power module to be tested so that the software overvoltage protection fixed value is larger than the hardware overvoltage protection fixed value;
the charging module is used for charging the power module to be tested and increasing the capacitance voltage value of the power module to be tested to a first preset voltage value;
the first data acquisition module is used for disconnecting the downlink communication optical fiber between the valve control system and the power module to be tested after the capacitor voltage value is increased to the first preset voltage value, and acquiring the bypass state and the capacitor voltage value of the power module to be tested in real time;
the first data processing module is used for judging whether the power module to be tested is in a bypass state or not according to the bypass state and the capacitance voltage value, and whether the capacitance voltage value of the power module to be tested is reduced or not until the power module to be tested is powered down;
the second data acquisition module is used for acquiring the hardware condition and the bypass switch state of the power module to be tested when the power module to be tested is in the bypass state and the capacitance voltage value of the power module to be tested is reduced until the power module to be tested is powered down;
the second data processing module is used for judging whether the hardware of the power module to be tested is damaged or not according to the hardware condition and the bypass switch state, and whether the bypass switch state is in a closed state or not;
and the test result output module is used for judging that the overvoltage protection function of the hardware of the power module to be tested is normal when the hardware of the power module to be tested is not damaged and the bypass switch state is in a closed state.
7. The device for testing the effectiveness of the overvoltage protection function of the hardware of the power module according to claim 6, wherein the first data acquisition module is configured to acquire the bypass state and the capacitor voltage value of the power module to be tested in real time, specifically:
and acquiring a bypass state and a capacitance voltage value sent by the power module to be tested through the uplink communication optical fiber in real time through the valve control system.
8. The device for testing the validity of the overvoltage protection function of the hardware of the power module according to claim 7, wherein the first data acquisition module is configured to disconnect the downstream communication fiber between the valve control system and the power module to be tested after the capacitor voltage value is raised to the first preset voltage value, specifically:
and after the capacitor voltage value is increased to the first preset voltage value, and under the condition that the capacitor voltage value of the power module to be tested is within a first preset voltage value range, disconnecting the downlink communication optical fiber between the valve control system and the power module to be tested.
9. The device for testing the effectiveness of the overvoltage protection function of the hardware of the power module according to claim 8, wherein the charging module is configured to charge the power module to be tested and raise the capacitance voltage value of the power module to be tested to a first preset voltage value, specifically:
based on a preset charging loop, the power modules to be tested are charged by controlling the number of the power modules except the power modules to be tested in the charging loop, and the capacitance voltage value of the power modules to be tested is increased to a first preset voltage value, wherein the charging loop is formed by connecting a power module, the power modules to be tested, at least one power module except the power modules to be tested and an inductance module in series.
10. The device for testing the validity of the hardware overvoltage protection function of the power module according to claim 9, wherein the software overvoltage protection constant value modification module is configured to modify the software overvoltage protection constant value of the power module to be tested according to a preset hardware overvoltage protection constant value of the power module to be tested, and specifically includes:
acquiring software overvoltage protection program codes of a power module to be tested, wherein the software overvoltage protection program codes comprise assignment codes for assigning a software overvoltage protection fixed value of the power module to be tested;
modifying the assignment code according to a preset hardware overvoltage protection fixed value of a power module to be tested so that the software overvoltage protection fixed value is larger than the hardware overvoltage protection fixed value;
and writing the software overvoltage protection program code after modifying the assignment code into a control chip of the power module to be tested.
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