CN104793720B - A kind of power supply second protection method - Google Patents
A kind of power supply second protection method Download PDFInfo
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- CN104793720B CN104793720B CN201510213037.7A CN201510213037A CN104793720B CN 104793720 B CN104793720 B CN 104793720B CN 201510213037 A CN201510213037 A CN 201510213037A CN 104793720 B CN104793720 B CN 104793720B
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Abstract
The invention discloses a kind of power supply second protection method, including：Power reset；The starting of total failare number is entered as 0, the starting of time is entered as 0；Power initiation starts, and carries out starting judgement for the first time, judges whether first threshold time interior power successfully starts up；If success, carries out fault scanning；If occurring, shut-off operation is performed, and total failare number adds 1, if not occurring, persistently carries out fault scanning；If unsuccessful, shut-off operation is performed, and total failare number adds 1；Judge whether current total failare number is more than default total failare number threshold value；If being more than, into locking state；If being less than or equal to, it is delayed the Second Threshold time, it is without any processing；Startup judgement is carried out again, judges whether first threshold time interior power successfully starts up；If unsuccessful, into locking state；If success, judges whether broken down in a controlling cycle；If not occurring, fault scanning is persistently carried out；If occurring, into locking state.
Description
Technical field
The present invention relates to power supply technical field, a kind of power supply second protection method is particularly related to.
Background technology
In Power Management Design, when failure (all kinds of over-pressed, under-voltage, excessively streams and overheat protector of input and output etc.) occurs,
Generally using shut-off protection, after malfunction is eliminated, carry out recovery and restart or " locked " shut-off.This protected mode, it is impossible to
Judgement be in short-term double faults either chance failure, take failure unified protected mode, it is impossible to obtain preferable protection
Effect.
Existing second protection method stresses to realize reliably protecting to single failure, is typically in basic error protection work(
On the basis of energy circuit, increase extra protection mechanism, in the case of realizing that protection act is not operating in first time, by extra
Protection mechanism realize the second layer protect.
Existing second protection method, stresses the function of second of protection, the standby guarantor that second of protection is protected for first time
Shield or supplement protection.This protection can not differentiate that failure is chance failure or double faults.The part of power supply to a certain extent
When chance failure occurs for failure, due to there is the presence of protection mechanism, it can allow to be handled by the way of shut-off is restarted.And
For double faults, double faults in short-term are particularly, then need to draw attention.
Realizing the circuit of second protection has a variety of, using analog circuit can with comparator obtain over-pressed, under-voltage, excessively stream,
The malfunctions such as short circuit, excess temperature, are constituted with RC circuits etc. and are delayed, then are combined with certain logic circuit and go into secondary guarantor
Shield.Or using the method for digital circuit, carry out sampling and the epidemic situation comparison of parameter with analog-digital converter, then with the method for software
Realize second protection control.
The content of the invention
In view of this, it is an object of the invention to propose a kind of power supply second protection method, for including input excessively stream, defeated
It has overvoltage, the under-voltage, output overcurrent of output, output short-circuit etc. and restarts the one of which or all types of eliminable failure (hereinafter
Abbreviation failure) implement second protection, the monitoring of optimal startup process and control, the setting to failure total degree is added, make guarantor
Shield is more comprehensively and intelligent.
The power supply second protection method provided based on the above-mentioned purpose present invention, it is characterised in that including：
Power reset；
After the completion of reset, the starting of total failare number is entered as 0, the starting of time is entered as 0；
Power initiation starts, and carries out starting judgement for the first time, judges whether first threshold time interior power successfully starts up；
If power initiation success, carries out fault scanning；If breaking down, shut-off operation is performed, and total failare number adds
1, if not breaking down, persistently carry out fault scanning；
If power initiation is unsuccessful, shut-off operation is performed, and total failare number adds 1；
Judge whether current total failare number is more than default total failare number threshold value；
If current total failare number is more than default total failare number threshold value, into locking state；
If current total failare number is less than or equal to default total failare number threshold value, it is delayed the Second Threshold time, in delay
It is without any processing in the Second Threshold time；
Startup judgement is carried out again, judges whether first threshold time interior power successfully starts up；
If power initiation is unsuccessful, shut-off operation is performed, and enter locking state；
If power initiation success, judges whether broken down in a controlling cycle；
If not broken down in a controlling cycle, fault scanning is persistently carried out；
If occurring failure in a controlling cycle, shut-off operation is performed, and enter locking state.
In some embodiments, the first threshold time enters according to 2-3 times of the most long startup normal time of power supply
Row is calculated.
In some embodiments, the Second Threshold time turns off to 2-3 times of the zero-time according to the most long of power supply
Row is calculated.
In some embodiments, the controlling cycle is by most long startup normal time and most long shut-off to zero-time sum
10 times calculated.
In some embodiments, after probability of happening and harmfulness of the default total failare number threshold value according to protection operation
Fruit is set and selected.
From the above it can be seen that the power supply second protection method that the present invention is provided, can be to power initiation and fortune
Failure during row is monitored, and takes shut-off to restart single failure, long interval of time single failure is exceeded certain time
Number and in short-term double faults carry out " locked " protection.Play a part of the influence of reduction chance failure and immediately protection double faults.
The power supply second protection method, is different from general secondary protection function, increases the counting and timing to single failure, when tired
Metering number exceedes certain number of times, or occurs failure twice in short-term, can make " locked " shut-off.Then only carried out for chance failure
Shut-off delay is restarted.Monitoring of the increase to failure during power initiation, start-up study is optimized simultaneously.
Brief description of the drawings
The schematic flow sheet for the power supply second protection embodiment of the method that Fig. 1 provides for the present invention.
Embodiment
For the object, technical solutions and advantages of the present invention are more clearly understood, below in conjunction with specific embodiment, and reference
Accompanying drawing, the present invention is described in more detail.
It should be noted that all statements for using " first " and " second " are for differentiation two in the embodiment of the present invention
The entity of individual same names non-equal or the parameter of non-equal, it is seen that " first " " second " should not only for the convenience of statement
The restriction to the embodiment of the present invention is interpreted as, subsequent embodiment no longer illustrates one by one to this.
Referring to the drawings 1, the schematic flow sheet of the power supply second protection embodiment of the method provided for the present invention.
As shown in figure 1, the power supply second protection method, comprises the following steps：
Step 100：Power reset；
Step 101：After the completion of reset, the starting of total failare number is entered as 0, the starting of time is entered as 0 (total failare number
F=0, time T=0)；
Step 102：Power initiation starts, and carries out starting judgement for the first time, whether judges first threshold time T1 interior powers
Successfully start up；
If power initiation success, goes to step 103：Carry out fault scanning；If breaking down, step 104 is gone to：Hold
Row shut-off operation, and total failare number F adds 1, if not breaking down, return to step 103：Persistently carry out fault scanning；
If power initiation is unsuccessful, step 104 is gone to：Shut-off operation is performed, and total failare number F adds 1；
Step 105：Judge whether current total failare number F is more than default total failare number threshold value T4；
If current total failare number F is more than default total failare number threshold value T4, step 110 is gone to：Into locking state；
If current total failare number F is less than or equal to default total failare number threshold value T4, step 106 is gone to：Be delayed the second threshold
Value time T2, it is without any processing in the Second Threshold time T2 of delay；
Step 107：Startup judgement is carried out again, judges whether first threshold time T1 interior powers successfully start up；
If power initiation is unsuccessful, step 109 is gone to：Shut-off operation is performed, and performs step 110：Into locked shape
State；
If power initiation success, goes to step 108：Judge whether broken down in a controlling cycle；
If not broken down in a controlling cycle T3, then it is assumed that it is chance failure, goes to step 103：It is lasting to carry out event
Barrier scanning；
If there is failure in a controlling cycle T3, step 109 is gone to：Shut-off operation is performed, and performs step
110：Into locking state.
Wherein, described shut-off operation refers to turn off system and exported；The locking state refers to system being placed in locked
Guard mode, needing to reset power supply after Failure elimination can just restart.
In order to ensure the security performance of system, first threshold time T1 is carried out by 2-3 times most long startup normal time
Calculate, such as most long startup normal time is 0.3S, then first threshold time T1=0.85S may be selected.
In order to ensure the security performance of system, Second Threshold time T2 is carried out by 2-3 times most long shut-off to zero-time
Calculate, such as most long shut-off to zero-time is 0.1S, then Second Threshold time T2=0.27S may be selected.
In order to ensure the security performance of system, the controlling cycle T3 is by most long startup normal time and most long shut-off to zero
10 times of time sum are calculated, and such as most long startup normal time is 0.3S, and most long shut-off then may be selected to zero-time 0.1S
Controlling cycle T3=4S.
The selection of times of the default total failare number threshold value T4, the hair of (operation carried out during failure) is operated by protection
Raw probability and harmfulness consequence are manually set and selected, preferably, may be selected to be 20 times.
Embodiment can be seen that the power supply second protection method that the present invention is provided from above, optimize startup
The monitoring of process and control, the setting to failure total degree is added, make protection more comprehensively and intelligence.The power supply second protection
Method, can be monitored with the failure in running to power initiation, take shut-off to restart single failure, long-time
Exceed certain number of times every single failure and double faults carry out " locked " protection in short-term.Play the influence of reduction chance failure and instant
Protect the effect of double faults.The power supply second protection method, is different from general secondary protection function, increase is to single event
, when cumulative number exceedes certain number of times, or there is failure twice in short-term in the counting and timing of barrier, can make " locked " shut-off.
Shut-off delay is then only carried out for chance failure to restart.Monitoring of the increase to failure during power initiation, startup is prolonged simultaneously
When optimize.
It is important to note that although above-described embodiment gives the reasonable value of parameters, it is directed to
Time span is arrived, can be selected and be set according to actual conditions.
Those of ordinary skills in the art should understand that：The specific embodiment of the present invention is the foregoing is only, and
The limitation present invention is not used in, within the spirit and principles of the invention, any modification, equivalent substitution and improvements done etc.,
It should be included within protection scope of the present invention.
Claims (5)
1. a kind of power supply second protection method, it is characterised in that including：
Power reset；
After the completion of reset, the starting of total failare number is entered as 0, the starting of time is entered as 0；
Power initiation starts, and carries out starting judgement for the first time, judges whether first threshold time interior power successfully starts up；
If power initiation success, carries out fault scanning；If breaking down, shut-off operation is performed, and total failare number adds 1, if
Do not break down, then persistently carry out fault scanning；
If power initiation is unsuccessful, shut-off operation is performed, and total failare number adds 1；
Judge whether current total failare number is more than default total failare number threshold value；
If current total failare number is more than default total failare number threshold value, into locking state；
If current total failare number is less than or equal to default total failare number threshold value, it is delayed the Second Threshold time, the second of delay
It is without any processing in threshold time；
Startup judgement is carried out again, judges whether first threshold time interior power successfully starts up；
If power initiation is unsuccessful, shut-off operation is performed, and enter locking state；
If power initiation success, judges whether broken down in a controlling cycle；
If not broken down in a controlling cycle, fault scanning is persistently carried out；
If occurring failure in a controlling cycle, shut-off operation is performed, and enter locking state.
2. power supply second protection method according to claim 1, it is characterised in that the first threshold time is according to power supply
Most long startup 2-3 times of normal time calculated.
3. power supply second protection method according to claim 1, it is characterised in that the Second Threshold time is according to power supply
Most long shut-off to 2-3 times of zero-time calculated.
4. power supply second protection method according to claim 1, it is characterised in that the controlling cycle is started just as most long
The normal time is calculated with most long turn off to 10 times of zero-time sum.
5. power supply second protection method according to claim 1, it is characterised in that the default total failare number threshold value according to
The probability of happening and harmfulness consequence of operation is protected to be set and selected.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201510213037.7A CN104793720B (en) | 2015-04-29 | 2015-04-29 | A kind of power supply second protection method |
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| CN201510213037.7A CN104793720B (en) | 2015-04-29 | 2015-04-29 | A kind of power supply second protection method |
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| CN104793720A CN104793720A (en) | 2015-07-22 |
| CN104793720B true CN104793720B (en) | 2017-08-01 |
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| CN106026628B (en) * | 2016-06-30 | 2018-07-10 | 江苏国网自控科技股份有限公司 | A kind of reset locking-type frequency converter resumption control method and device |
| CN110399028A (en) * | 2019-06-28 | 2019-11-01 | 苏州浪潮智能科技有限公司 | Method, equipment and the medium for preventing surge from occurring when a kind of power supply batch operation |
Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101877480A (en) * | 2009-12-10 | 2010-11-03 | 贵州电力试验研究院 | Method for judging voltage compensation of single-pole adaptive reclosure of electric transmission line |
| CN103354352A (en) * | 2013-04-23 | 2013-10-16 | 国家电网公司 | Distributed intelligence based power distribution network safety protection method |
Family Cites Families (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP2319151A4 (en) * | 2008-08-29 | 2013-12-25 | Abb Research Ltd | Method and apparatus for fault identification in a power transmission line |
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Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101877480A (en) * | 2009-12-10 | 2010-11-03 | 贵州电力试验研究院 | Method for judging voltage compensation of single-pole adaptive reclosure of electric transmission line |
| CN103354352A (en) * | 2013-04-23 | 2013-10-16 | 国家电网公司 | Distributed intelligence based power distribution network safety protection method |
Non-Patent Citations (1)
| Title |
|---|
| 《自动重合器在配电网中的应用》;陈刚等;《继电器》;19990930;第27卷(第5期);第35-38页 * |
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