CN108872746B - Misjudgment prevention method and device for voltage drop test - Google Patents
Misjudgment prevention method and device for voltage drop test Download PDFInfo
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Abstract
The invention discloses a misjudgment prevention method and a device for a voltage drop test, wherein the method comprises the following steps: the server acquires the Hold-up time of the AC power supply; obtaining PG Hold-up time of powerfail signals; wherein the PG Hold-up time is less than the Hold-up time; judging whether the PG Hold-up time is greater than the voltage drop time and less than or equal to the difference between the Hold-up time and a preset time threshold value; if not, the PG Hold-up time is modified to be the time which is larger than the voltage drop time and smaller than or equal to the difference between the Hold-up time and a preset time threshold, or a user is prompted to have a misjudgment risk; the invention eliminates the influence of the switching of the power supply system in the server on the voltage drop test, avoids the occurrence of misjudgment, improves the passing rate of the electromagnetic compatibility certification of the product, and improves the product quality and the user experience.
Description
Technical Field
The invention relates to the technical field of power electronics, in particular to a misjudgment prevention method and device for a voltage drop test.
Background
Electrical and electronic devices are subject to voltage sags, short interruptions and voltage variations in the power supply network, known in the field of electromagnetic compatibility as voltage sags. The national standard GB/T17625.11 sets out a standard for this type of phenomenon, in which there is a term relating to voltage sag, specifying a voltage drop of 95%, duration of 0.5 cycles, and the criterion of performance passing the test is class B (temporary loss or reduction of function or performance, but self-recovery after the disturbance has ceased, without operator intervention).
In the prior art, as for a voltage drop test scheme, as shown in fig. 1, a power grid supplies power to a test instrument, and after being controlled by the test instrument, the power is supplied to a server to be tested in a certain form, which includes the above voltage drop. With the development of servers, some models of servers have battery powered functions. When the power grid is powered off, the AC power supply sends out powerfail signals to the management chip, the management chip switches the power supply system, the AC power supply system is closed, and the battery power supply system is started. Therefore, the test result of the voltage drop test is influenced by the switching of the power supply system, and the condition of misjudgment is generated, for example, when the power supply is switched to the battery module, the test result of the voltage drop test is directly judged to be failed. Therefore, how to avoid the occurrence of misjudgment of the voltage drop test, improve the passing rate of the electromagnetic compatibility certification of the product, and improve the product quality is a problem which needs to be solved urgently nowadays.
Disclosure of Invention
The invention aims to provide a method and a device for preventing misjudgment of a voltage drop test, so as to avoid the misjudgment of the voltage drop test, improve the passing rate of electromagnetic compatibility certification of a product and improve the quality of the product.
In order to solve the above technical problem, the present invention provides a method for preventing misjudgment of a voltage drop test, including:
the server acquires the Hold-up time of the AC power supply; the Hold-up time is the time for maintaining normal power supply of the power supply output of the AC power supply after the power supply input of the AC power supply is interrupted;
obtaining PG Hold-up time of powerfail signals; the PG Hold-up time is the time for maintaining the PG signal corresponding to the powerfail signal at a high level after the power supply input of the AC power supply is interrupted, and the PG Hold-up time is less than the Hold-up time;
judging whether the PG Hold-up time is greater than the voltage drop time and less than or equal to the difference between the Hold-up time and a preset time threshold value; wherein the voltage sag time is an interruption time of a power supply input of the AC power supply in a voltage sag test;
if not, the PG Hold-up time is modified to be the time which is larger than the voltage drop time and smaller than or equal to the difference between the Hold-up time and a preset time threshold, or the user is prompted to have a misjudgment risk.
Optionally, after obtaining the Hold-up time of the AC power, the server further includes:
judging whether the Hold-up time is greater than the voltage drop time or not;
and if so, executing the step of obtaining the PG Hold-up time of the powerfail signal.
Optionally, the voltage drop time is specifically 10ms, and the preset time threshold is specifically 1 ms.
Optionally, before obtaining the Hold-up time of the AC power, the server further includes:
the server judges whether the load percentage is within a preset range or not, and the reference power is smaller than or equal to a preset power threshold; wherein the reference power is the product of the percentage of the load and the power of the AC power source;
if not, adjusting the load percentage to be within the preset range, and adjusting the reference power to be smaller than or equal to the preset power threshold;
and if so, executing the step that the server acquires the Hold-up time of the AC power supply.
Optionally, the preset range is specifically 20% to 40%, and the preset power threshold is specifically 700W.
In addition, the invention also provides a misjudgment prevention device for the voltage drop test, which comprises:
the first acquisition module is used for acquiring the Hold-up time of the AC power supply; the Hold-up time is the time for maintaining normal power supply of the power supply output of the AC power supply after the power supply input of the AC power supply is interrupted;
the second acquisition module is used for acquiring PG Hold-up time of the powerfail signal; the PG Hold-up time is the time for maintaining the PG signal corresponding to the powerfail signal at a high level after the power supply input of the AC power supply is interrupted, and the PG Hold-up time is less than the Hold-up time;
the first judgment module is used for judging whether the PG Hold-up time is greater than the voltage drop time and less than or equal to the difference between the Hold-up time and a preset time threshold value; wherein the voltage sag time is an interruption time of a power supply input of the AC power supply in a voltage sag test;
and the misjudgment prevention module is used for modifying the PG Hold-up time into a time which is greater than the voltage drop time and less than or equal to the difference between the Hold-up time and the preset time threshold value or prompting a user to have a misjudgment risk if the PG Hold-up time is less than the voltage drop time or is greater than the difference between the Hold-up time and the preset time threshold value.
Optionally, the apparatus further comprises:
the second judgment module is used for judging whether the Hold-up time is greater than the voltage drop time or not; and if so, sending a starting signal to the second acquisition module.
Optionally, the first determining module is specifically configured to determine whether the Hold-up time of the PG is greater than 10ms and less than or equal to a difference between the Hold-up time and 1 ms.
Optionally, the apparatus further comprises:
the third judgment module is used for judging whether the load percentage is within a preset range or not by the server and the reference power is less than or equal to a preset power threshold; wherein the reference power is the product of the percentage of the load and the power of the AC power source; if yes, sending a starting signal to the first acquisition module;
and the adjusting module is used for adjusting the load percentage to be within the preset range and adjusting the reference power to be smaller than or equal to the preset power threshold.
Optionally, the third determining module is specifically configured to determine whether the load percentage is within 20% to 40% and the reference power is less than or equal to 700W.
The invention provides a misjudgment prevention method for a voltage drop test, which comprises the following steps: the server acquires the Hold-up time of the AC power supply; the Hold-up time is the time for maintaining normal power supply of the power supply output of the AC power supply after the power supply input of the AC power supply is interrupted; obtaining PG Hold-up time of powerfail signals; the PG Hold-up time is the time for maintaining the PG signal corresponding to the powerfail signal at a high level after the power supply input of the AC power supply is interrupted, and the PG Hold-up time is less than the Hold-up time; judging whether the PG Hold-up time is greater than the voltage drop time and less than or equal to the difference between the Hold-up time and a preset time threshold value; the voltage drop time is the interruption time of the power supply input of the AC power supply in the voltage drop test; if not, the PG Hold-up time is modified to be the time which is larger than the voltage drop time and smaller than or equal to the difference between the Hold-up time and a preset time threshold, or a user is prompted to have a misjudgment risk;
therefore, the invention eliminates the influence of the switching of the power supply system in the server on the voltage drop test by judging whether the PG Hold-up time is greater than the voltage drop time and less than or equal to the difference between the Hold-up time and the preset time threshold value, avoids the occurrence of misjudgment, improves the passing rate of the electromagnetic compatibility certification of the product, and improves the product quality and the user experience. In addition, the invention also provides a misjudgment prevention device for the voltage drop test, and the device also has the beneficial effects.
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, it is obvious that the drawings in the following description are only embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to the provided drawings without creative efforts.
FIG. 1 is a schematic diagram of a voltage sag test in the prior art;
fig. 2 is a flowchart of a misjudgment prevention method for a voltage drop test according to an embodiment of the present invention;
fig. 3 is a timing diagram illustrating a method for preventing misjudgment in a voltage drop test according to an embodiment of the present invention;
FIG. 4 is a schematic diagram of a flow of a misjudgment deduction process of a voltage drop test;
fig. 5 is a structural diagram of a misjudgment prevention apparatus for a voltage sag test according to an embodiment of the present invention.
Detailed Description
In order to make the objects, technical solutions and advantages of the embodiments of the present invention clearer, the technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are some, but not all, embodiments of the present invention. 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. 2, fig. 2 is a flowchart illustrating a method for preventing misjudgment in a voltage sag test according to an embodiment of the present invention. The method can comprise the following steps:
step 101: the server obtains the Hold-up time of the AC power supply.
Among them, in the AC power design of the server as shown in fig. 1, it is generally designed that the AC power can withstand ten and several milliseconds of power failure, that is, within a period of ten and several milliseconds, if the power supply of the power grid is disconnected, the AC power should maintain output, and the period of ten and several millimeters is called hold-up time, refer to fig. 3. That is, the Hold-up time in this step is the time for maintaining the normal power supply of the power supply output of the AC power supply after the power supply input of the AC power supply is interrupted.
It can be understood that, in this step, the specific manner in which the server obtains the Hold-up time of the AC power supply may be set by a designer according to a practical scenario and a user requirement, may be directly received or detected by the server from a parameter of the Hold-up time of the AC power supply preset by the user, and may also be detected by the server, for example, when the power supply input of the AC power supply is disconnected and the battery power supply is not switched, the Hold-up time of the AC power supply is detected. The present embodiment does not impose any limitation as long as the server can obtain the Hold-up time of the AC power.
It should be noted that, because the voltage sag test needs to be interrupted for 0.5 period, which is calculated according to a conventional 50Hz grid, 0.5 period is 10ms, this embodiment may further include a step of determining, by the server, whether the voltage sag test can be passed, for example, a step of determining whether the Hold-up time of the AC power supply is greater than the voltage sag time may be added after this step and before step 103, where the voltage sag time is an interruption time of the power supply input of the AC power supply in the voltage sag test (10 ms of the 50Hz grid); if yes, the step 102 or the step 103 may be continued, and a situation that the server capable of passing the voltage sag test is misjudged due to the influence of the switching of the power supply system is avoided through the embodiment; if not, the Hold-up time of the AC power supply can be prompted to the user through a display screen or other alarm devices, and the server is prevented from voltage sag test failure and other dangerous conditions.
Step 102: and acquiring PG Hold-up time of the powerfail signal.
As shown in fig. 1, the AC power supply and the management chip are connected to a PG signal, the PG signal is in a normally high state when the AC power supply is normal, and the PG signal is converted into a low level when the AC input is interrupted. Since the timing signal and the power signal must satisfy the principle of "falling first after the power signal is stable," the principle of "falling first after the timing signal and the power signal" means that the timing signal must be valid after the power signal is stable and before the power signal falls, and the PG signal is the timing signal, as shown in fig. 3, the time for the PG signal to maintain high after the power input (AC input) of the AC power supply is interrupted is defined as the PG Hold-up time. Therefore, the PG Hold-up time in the step can be the time for maintaining the PG signal corresponding to the powerfail signal at a high level after the power supply input of the AC power supply is interrupted, and the PG Hold-up time is less than the Hold-up time.
It can be understood that, in this step, the specific manner in which the server acquires the PG Hold-up time of the powerfail signal may be set by a designer according to a practical scene and a user requirement, may be directly received or detected by the server as a parameter of the PG Hold-up time of the powerfail signal preset by the user, and may also be set by the server as the PG Hold-up time of the powerfail signal detected by the server, for example, when the power supply input of the AC power supply is disconnected, the PG Hold-up time of the powerfail signal or the time of switching the power supply of the battery. The embodiment does not limit the PG Hold-up time of the powerfail signal as long as the server can obtain the PG Hold-up time of the powerfail signal.
Step 103: judging whether the PG Hold-up time is greater than the voltage drop time and less than or equal to the difference between the Hold-up time and a preset time threshold value; if not, go to step 104.
It should be noted that, by deducing the erroneous determination of the voltage drop test as shown in fig. 4, when the voltage drop test is started, the test apparatus cuts off the power supply output, and the power supply Input (AC Input) of the AC power supply is interrupted, but the power supply output (AC output) of the AC power supply still exists, and when the AC power supply is suddenly cut off, the output is maintained for a short time. Referring to the timing chart of fig. 3, after the AC power is cut off, after the AC power is delayed for several ms, the management chip sends a powerfail signal to the management chip before the power output drops, the management chip sends an instruction to the battery power system, the battery power system (battery module) starts to supply power, and at the same time, the AC power system is completely cut off. At this time, in a laboratory test state, an accident often occurs, the battery power supply system needs to be charged, when the battery power supply system does not supply power, the server does not have any power supply input, and the server is powered down at this time. If the test time is not 10ms (50Hz grid), the test is judged to be Fail.
Therefore, as in the deduction flow of fig. 4, at the determination node, when the time for the powerfail signal to reach the management chip is less than or equal to 10ms, we also branch out a determination node according to whether the battery is powered, and when the battery is powered, the power supply system is switched to the battery power supply, and when the machine is maintained for the 10 th ms, the machine will always work normally, so the test is Pass; when the battery is not powered, the management chip switches the power supply system, so that the hold up time of the AC power supply is terminated in advance, at this time, the battery power supply does not catch up, the machine is powered down, the test time is not reached for 10ms, and the test can only be judged as Fail.
In summary, referring to the deduction flow shown in fig. 4, at the judgment node, when the time that the powerfail signal reaches the motherboard management chip is longer than 10ms, it does not matter whether the management chip is switched, whether the battery is powered on, and whether the machine is powered off, because the power supply of the test instrument is restored in the 10 th ms, and the test is also finished, in the 10ms, the test equipment is all normal, and this situation does not cause any misjudgment.
It can be understood that, referring to the derivation process shown in fig. 4, when the PG Hold-up time of the PG signal corresponding to the powerfail signal is less than the voltage drop time (e.g., 10ms), there is a risk of misjudgment of the voltage drop test, and the purpose of this embodiment may be to determine whether there is a risk of misjudgment of the voltage drop test in the PG Hold-up time through this step. The voltage drop time in this step is the interruption time of the power supply input of the AC power supply in the voltage drop test (10 ms for a 50Hz grid).
Specifically, in the IT design, the timing signal and the power signal must satisfy the principle of "fall from the beginning to the end", and the principle of "fall from the beginning to the end" means that the timing signal must be valid after the power signal is stable and before the power signal falls, that is, the PG Hold-up time needs to be less than or equal to the Hold-up time and the preset time threshold. The preset time threshold may be a minimum time that the PG signal preset by the user maintains a high level for a time shorter than the hold-up time. The specific setting of the preset time threshold may be set by a designer or a user according to a practical scenario and a user requirement, for example, the setting may be 1ms, and this embodiment does not limit this.
Correspondingly, when the step of judging whether the voltage sag test can be passed by the server is added, in the step of judging whether the voltage sag test can be passed by the server, the step can directly judge whether the difference between the Hold-up time and the preset time threshold is less than or equal to the difference between the Hold-up time and the preset time threshold so as to avoid multiple judgments on whether the PG Hold-up time is greater than the voltage sag time. The present embodiment does not set any limit to this.
It should be noted that, in this step, when it is determined that the PG Hold-up time is greater than the voltage drop time and less than or equal to the difference between the Hold-up time and the preset time threshold, that is, after it is determined that there is no influence of the switching of the power supply system on the voltage drop test, the user may be informed of information that the voltage drop test can be performed through the display screen or other display devices, or a start signal may be directly sent to the test equipment to perform the voltage drop test. The present embodiment does not set any limit to this.
Step 104: and modifying the PG Hold-up time into a time which is greater than the voltage drop time and less than or equal to the difference between the Hold-up time and a preset time threshold, or prompting a user to have a misjudgment risk.
The aim of the step can be that under the condition that the PG Hold-up time is less than the voltage drop time or more than the time of the difference between the Hold-up time and the preset time threshold, the server can automatically modify the PG Hold-up time to enable the PG Hold-up time to be more than the voltage drop time and less than or equal to the difference between the Hold-up time and the preset time threshold; the user can also be prompted to have a misjudgment risk, namely the user is informed of the need to modify the PG Hold-up time, for example, the user can connect a delay circuit in parallel on a PG signal on the mainboard, the PG Hold-up time is modified through the delay circuit, a tester can also be informed of the need to ensure the power state of the battery module, and the misjudgment condition of the voltage drop test is avoided. The present embodiment does not set any limit to this.
It will be appreciated that since the hold-up time is greater than the voltage drop time (e.g. 10ms for a 50Hz grid), it is subject to AC mains power and load, and standards require that no stress tests be required in the voltage drop test, as long as the functions of the apparatus are working properly. Thus, the reference power P' of the AC power source may be less than or equal to a predetermined power threshold (e.g., 700W) by controlling the load, such as reducing the fan speed, to ensure that the load percentage K is within a predetermined range (e.g., 20% ≦ K ≦ 40%), where P ═ P ≦ P0×K，P0Is the power of the AC power source. That is, step 101 of this embodiment may further include a step in which the server determines whether the load percentage is within the preset range and the reference power is less than or equal to the preset power threshold, if yes, step 101 may be entered, and if no, the server adjusts the load percentage to be within the preset range and adjusts the reference power to be less than or equal to the preset power threshold, or notifies the user to connect or disconnect the load. The specific value setting of the preset range and the preset power threshold may be set by a designer, which is not limited in this embodiment.
In the embodiment, whether the PG Hold-up time is larger than the voltage drop time and smaller than or equal to the difference between the Hold-up time and the preset time threshold value or not is judged, so that the influence of the switching of a power supply system in the server on the voltage drop test is eliminated, the misjudgment is avoided, the passing rate of the electromagnetic compatibility certification of the product is improved, and the product quality and the user experience are improved.
Referring to fig. 5, fig. 5 is a structural diagram of a misjudgment prevention apparatus for a voltage sag test according to an embodiment of the present invention. The apparatus may include:
a first obtaining module 100, configured to obtain a Hold-up time of an AC power supply; the Hold-up time is the time for maintaining normal power supply of the power supply output of the AC power supply after the power supply input of the AC power supply is interrupted;
a second obtaining module 200, configured to obtain PG Hold-up time of the powerfail signal; the PG Hold-up time is the time for maintaining the PG signal corresponding to the powerfail signal at a high level after the power supply input of the AC power supply is interrupted, and the PG Hold-up time is less than the Hold-up time;
the first judging module 300 is used for judging whether the PG Hold-up time is greater than the voltage drop time and less than or equal to the difference between the Hold-up time and a preset time threshold value; the voltage drop time is the interruption time of the power supply input of the AC power supply in the voltage drop test;
and the misjudgment prevention module 400 is used for modifying the PG Hold-up time into a time which is greater than the voltage drop time and less than or equal to the difference between the Hold-up time and the preset time threshold value or prompting the user that the misjudgment risk exists if the PG Hold-up time is less than the voltage drop time or is greater than the difference between the Hold-up time and the preset time threshold value.
Optionally, the apparatus may further include:
the second judgment module is used for judging whether the Hold-up time is greater than the voltage drop time or not; and if so, sending a starting signal to the second acquisition module.
Optionally, the first determining module 300 may be specifically configured to determine whether the Hold-up time of PG is greater than 10ms and less than or equal to a difference between the Hold-up time and 1 ms.
Optionally, the apparatus may further include:
the third judgment module is used for judging whether the load percentage is in a preset range or not by the server, and the reference power is less than or equal to a preset power threshold; wherein the reference power is the product of the percentage of the load and the power of the AC power source; if yes, sending a starting signal to the first acquisition module;
and the adjusting module is used for adjusting the load percentage to be within a preset range and adjusting the reference power to be less than or equal to a preset power threshold.
Optionally, the third determining module may be specifically configured to determine whether the percentage of the satisfied load is within 20% to 40% by the server, and the reference power is less than or equal to 700W.
In this embodiment, the first determining module 300 determines whether the PG Hold-up time is greater than the voltage drop time and less than or equal to the difference between the Hold-up time and the preset time threshold, so as to eliminate the influence of the switching of the power supply system in the server on the voltage drop test, avoid the occurrence of erroneous determination, improve the passing rate of the electromagnetic compatibility certification of the product, and improve the product quality and the user experience.
The embodiments are described in a progressive manner in the specification, each embodiment focuses on differences from other embodiments, and the same and similar parts among the embodiments are referred to each other. The device disclosed by the embodiment corresponds to the method disclosed by the embodiment, so that the description is simple, and the relevant points can be referred to the method part for description.
Those of skill would further appreciate that the various illustrative elements and algorithm steps described in connection with the embodiments disclosed herein may be implemented as electronic hardware, computer software, or combinations of both, and that the various illustrative components and steps have been described above generally in terms of their functionality in order to clearly illustrate this interchangeability of hardware and software. Whether such functionality is implemented as hardware or software depends upon the particular application and design constraints imposed on the implementation. 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 invention.
The steps of a method or algorithm described in connection with the embodiments disclosed herein may be embodied directly in hardware, in a software module executed by a processor, or in a combination of the two. A software module may reside in Random Access Memory (RAM), memory, Read Only Memory (ROM), electrically programmable ROM, electrically erasable programmable ROM, registers, hard disk, a removable disk, a CD-ROM, or any other form of storage medium known in the art.
The method and the device for preventing misjudgment of the voltage drop test provided by the invention are described in detail above. The principles and embodiments of the present invention are explained herein using specific examples, which are presented only to assist in understanding the method and its core concepts. It should be noted that, for those skilled in the art, it is possible to make various improvements and modifications to the present invention without departing from the principle of the present invention, and those improvements and modifications also fall within the scope of the claims of the present invention.
Claims (10)
1. A misjudgment prevention method for a voltage drop test is characterized by comprising the following steps:
the server acquires the Hold-up time of the AC power supply; the Hold-up time is the time for maintaining normal power supply of the power supply output of the AC power supply after the power supply input of the AC power supply is interrupted;
obtaining PG Hold-up time of powerfail signals; the PG Hold-up time is the time for maintaining the PG signal corresponding to the powerfail signal at a high level after the power supply input of the AC power supply is interrupted, and the PG Hold-up time is less than the Hold-up time;
judging whether the PG Hold-up time is greater than the voltage drop time and less than or equal to the difference between the Hold-up time and a preset time threshold value; wherein the voltage sag time is an interruption time of a power supply input of the AC power supply in a voltage sag test;
if not, the PG Hold-up time is modified to be the time which is larger than the voltage drop time and smaller than or equal to the difference between the Hold-up time and a preset time threshold, or the user is prompted to have a misjudgment risk.
2. The method for preventing misjudgment of a voltage drop test according to claim 1, wherein after the server obtains the Hold-up time of the AC power, the method further comprises:
judging whether the Hold-up time is greater than the voltage drop time or not;
and if so, executing the step of obtaining the PG Hold-up time of the powerfail signal.
3. The method according to claim 1, wherein the voltage drop time is 10ms, and the preset time threshold is 1 ms.
4. The method for preventing misjudgment of a voltage drop test according to any one of claims 1 to 3, wherein before the Hold-up time when the server obtains the AC power, the method further comprises:
the server judges whether the load percentage is within a preset range or not, and the reference power is smaller than or equal to a preset power threshold; wherein the reference power is the product of the percentage of the load and the power of the AC power source;
if not, adjusting the load percentage to be within the preset range, and adjusting the reference power to be smaller than or equal to the preset power threshold;
and if so, executing the step that the server acquires the Hold-up time of the AC power supply.
5. The method according to claim 4, wherein the predetermined range is 20% to 40%, and the predetermined power threshold is 700W.
6. The utility model provides a misjudgment prevention device of voltage drop test which characterized in that includes:
the first acquisition module is used for acquiring the Hold-up time of the AC power supply; the Hold-up time is the time for maintaining normal power supply of the power supply output of the AC power supply after the power supply input of the AC power supply is interrupted;
the second acquisition module is used for acquiring PG Hold-up time of the powerfail signal; the PG Hold-up time is the time for maintaining the PG signal corresponding to the powerfail signal at a high level after the power supply input of the AC power supply is interrupted, and the PG Hold-up time is less than the Hold-up time;
the first judgment module is used for judging whether the PG Hold-up time is greater than the voltage drop time and less than or equal to the difference between the Hold-up time and a preset time threshold value; wherein the voltage sag time is an interruption time of a power supply input of the AC power supply in a voltage sag test;
and the misjudgment prevention module is used for modifying the PG Hold-up time into a time which is greater than the voltage drop time and less than or equal to the difference between the Hold-up time and the preset time threshold value or prompting a user to have a misjudgment risk if the PG Hold-up time is less than the voltage drop time or is greater than the difference between the Hold-up time and the preset time threshold value.
7. The misjudgment prevention apparatus for a voltage sag test according to claim 6, further comprising:
the second judgment module is used for judging whether the Hold-up time is greater than the voltage drop time or not; and if so, sending a starting signal to the second acquisition module.
8. The device of claim 6, wherein the first determining module is specifically configured to determine whether the Hold-up time of PG is greater than 10ms and less than or equal to a difference between the Hold-up time and 1 ms.
9. The erroneous-judgment prevention apparatus for a voltage drop test according to any one of claims 6 to 8, characterized by further comprising:
the third judgment module is used for judging whether the load percentage is within a preset range or not, and the reference power is less than or equal to a preset power threshold; wherein the reference power is the product of the percentage of the load and the power of the AC power source; if yes, sending a starting signal to the first acquisition module;
and the adjusting module is used for adjusting the load percentage to be within the preset range and adjusting the reference power to be smaller than or equal to the preset power threshold.
10. The device according to claim 9, wherein the third determining module is specifically configured to determine whether the load percentage is within 20% to 40%, and the reference power is less than or equal to 700W.
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Citations (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4713553A (en) * | 1985-10-21 | 1987-12-15 | Motorola Inc. | Fast power-fail detector for power supplies with energy hysteresis |
| JPH01126565A (en) * | 1987-11-12 | 1989-05-18 | Fuji Electric Co Ltd | Voltage abnormality detection system |
| CN101241157A (en) * | 2008-02-28 | 2008-08-13 | 江苏省电力试验研究院有限公司 | Voltage temporary drop simulation test procedure and method |
| CN101331659A (en) * | 2005-12-15 | 2008-12-24 | Nxp股份有限公司 | Battery recharge prevention principle for short battery voltage dips |
| CN103018532A (en) * | 2012-12-13 | 2013-04-03 | 南京安炤电力电子有限公司 | Method and system for high-speed voltage drop detection |
| CN203166479U (en) * | 2013-04-08 | 2013-08-28 | 陕西北元化工集团有限公司 | Low-voltage electric dazzling prevention control device |
| CN103412260A (en) * | 2013-06-28 | 2013-11-27 | 株洲变流技术国家工程研究中心有限公司 | Voltage sag generator |
| CN205050774U (en) * | 2015-09-22 | 2016-02-24 | 上海华建电力设备股份有限公司 | Time delay release control ware |
| CN106998066A (en) * | 2017-05-27 | 2017-08-01 | 郑州云海信息技术有限公司 | The reliability checking method and device of a kind of switching circuit |
-
2018
- 2018-06-27 CN CN201810677098.2A patent/CN108872746B/en active Active
Patent Citations (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4713553A (en) * | 1985-10-21 | 1987-12-15 | Motorola Inc. | Fast power-fail detector for power supplies with energy hysteresis |
| JPH01126565A (en) * | 1987-11-12 | 1989-05-18 | Fuji Electric Co Ltd | Voltage abnormality detection system |
| CN101331659A (en) * | 2005-12-15 | 2008-12-24 | Nxp股份有限公司 | Battery recharge prevention principle for short battery voltage dips |
| CN101241157A (en) * | 2008-02-28 | 2008-08-13 | 江苏省电力试验研究院有限公司 | Voltage temporary drop simulation test procedure and method |
| CN103018532A (en) * | 2012-12-13 | 2013-04-03 | 南京安炤电力电子有限公司 | Method and system for high-speed voltage drop detection |
| CN203166479U (en) * | 2013-04-08 | 2013-08-28 | 陕西北元化工集团有限公司 | Low-voltage electric dazzling prevention control device |
| CN103412260A (en) * | 2013-06-28 | 2013-11-27 | 株洲变流技术国家工程研究中心有限公司 | Voltage sag generator |
| CN205050774U (en) * | 2015-09-22 | 2016-02-24 | 上海华建电力设备股份有限公司 | Time delay release control ware |
| CN106998066A (en) * | 2017-05-27 | 2017-08-01 | 郑州云海信息技术有限公司 | The reliability checking method and device of a kind of switching circuit |
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