CN104269815B - Power distribution protection method for loads - Google Patents
Power distribution protection method for loads Download PDFInfo
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- CN104269815B CN104269815B CN201410488214.8A CN201410488214A CN104269815B CN 104269815 B CN104269815 B CN 104269815B CN 201410488214 A CN201410488214 A CN 201410488214A CN 104269815 B CN104269815 B CN 104269815B
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- 238000000034 method Methods 0.000 title claims abstract description 27
- 230000004224 protection Effects 0.000 title claims abstract description 18
- 238000005070 sampling Methods 0.000 claims abstract description 8
- 238000006243 chemical reaction Methods 0.000 claims abstract description 6
- 230000000052 comparative effect Effects 0.000 claims description 12
- 230000000903 blocking effect Effects 0.000 claims description 8
- 230000005611 electricity Effects 0.000 claims description 2
- 230000001052 transient effect Effects 0.000 description 2
- 230000007812 deficiency Effects 0.000 description 1
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Abstract
The invention provides a power distribution protection method for loads. The method comprises the following steps that S1, sampling is carried out on load currents according to the conditions of the loads; S2, AD conversion is carried out on the sampled load currents; S3, the mean value of the load currents existing after the AD conversion is calculated is worked out; S4, the loads are protected according to the mean value of the currents. According to the power distribution protection method for the loads, influences of the surge currents generated at the moment of switching on or switching off a certain load or certain loads of a vehicle electric information system on the working state of the load or the loads can be avoided, the real-time performance, the reliability and the safety are improved, and the demand for load control is met.
Description
Technical field：
The present invention relates to a kind of power distribution protection method, in particular to a kind of for loading the method for carrying out power distribution protection.
Background technology：
What the load distribution of vehicle was usually realized using electrical switch, first given threshold during distribution, when certain
Between interval collection load electric current, each sampling is compared with default threshold value, judges whether that protection is negative according to comparing result
Carry.
But the load of vehicle electrical equipment has multiformity and complexity, wherein capacitive, perception and filament class is supported on
Powered on moment can produce very big current spike；Conventional electrical distribution method is very easy to cause the mistake of powered on moment to protect；
Secondly as the operating mode such as its working condition and ambient temperature is different, the electric current that same load is produced is also different, especially
Which is that the electric current in load occurs larger fluctuation, if at this moment when load is subject to outside electromagnetic interference in the course of the work
Protection by mistake is also extremely easily caused using traditional distribution method；
In addition, traditional distribution method only with by the transient current value and threshold value set in advance of collection relatively judging to be
No that load is protected, this method can not clearly distinguish the current status of load, such as load open circuit, excessively stream or short circuit
Difference judges, processes so as to the different conditions that can not be directed to load carry out different protections.
A kind of improved stepped load power distribution protection method is provided for this needs, by multiple electric currents of continuous acquisition
Relatively come the working condition for judging to load, this determination methods can be avoided due to transient current the threshold value of average and multiple settings
Randomness and the mistake protection that produces, while different guard methods can be taken according to different working conditions are loaded, shorten
The judgement time, improve real-time, reliability and safety.
The content of the invention：
In order to overcome the above-mentioned deficiency in the presence of prior art, the present invention to provide a kind of improved load power distribution protection side
Method.Arithmetic average is carried out to the sample magnitude of nearest continuous several times by the method for moving averages formula, it is to avoid vehicle electric information
System certain or some load is switched on or switched off the impact that the dash current of moment is caused to load operating condition, by load
The size of operating current carry out it is stepped compare and judge, so as to judge load working condition, shorten the judgement time, carry
High real-time, reliability and safety, meet the demand for control to loading.
The present invention provide technical scheme be：A kind of power distribution protection method of load, which thes improvement is that：Methods described
Comprise the steps：
S1, according to current sample of the load condition to the load；
S2, the load current that AD conversion is sampled；
S3, calculates the average of the load current after AD conversion；
S4, determines according to the average of the electric current and load is protected.
Preferably, step S1 comprises the steps：
01, count value T1 is set, the initial value of T2, T3, T4 is respectively 0,100,0,10；The initial value of threshold value A, B, C, D
Respectively 3,166,595,880；
02, according to whether the load is judged in blocking, it is determined that carrying out step 03 or step 06；
03, when the load is in blocking, according to judging whether described load re-powers determination and carry out step
04 or step 05；
04, when the load is re-powered, re-power to the load, unlock and load described in the load post-sampling
Electric current；
05, when the load is not re-powered, jump to the step 02；
06, when the load is not at blocking, the electric current of the load of sampling.
Further, step S3 includes the average of three electric currents for calculating continuous acquisition.
Further, step S4 comprises the steps：
001, average I of the electric current is compared with threshold values A, being determined according to comparative result carries out step 002 or step
Rapid 003；
002, when the electric current I is less than or equal to A, closes load, jumps to step 02 after pointing out load open circuit；
003, when the electric current I is more than A, electric current I is compared with threshold value B, and being determined according to comparative result carries out step
004 or step 005；
004, when the electric current I is less than or equal to B, connects load, points out load to jump to step 02 after connecting；
005, when the electric current I is more than B, electric current I is compared with threshold value C, and being determined according to comparative result carries out step
006 or step 007；
006, when the electric current I is less than or equal to C, carries out the first judgement subprocess；
007, when the electric current I is more than C, electric current I is compared with threshold value D, and being determined according to comparative result carries out step
008 or step 009；
008, when the electric current I is less than or equal to D, carries out the second judgement subprocess；
009 when the electric current I is more than D, jumps to step 02 after locking load output.
Further, first in the step 006 judges that subprocess is：
01), step 02 is carried out according to judging whether to reach interval time 0.5ms and determine) or jump to step 06),
02), when 0.5ms is reached the interval time, the numerical value of T1 adds 1；
03), according to the value for judging the T1, whether the value determination equal to the T2 carries out step 04) or jump to step
05)；
04), when the value of the T1 is equal to the value of the T2, the value of T1 is reset, closes load, after pointing out load overcurrent
Jump to step 02；
05), when the value of the T1 is not equal to the value of the T2, jump to step 02；
06), when 0.5ms is not reached the interval time, jump to step 02.
Further, second in the step 008 judges that subprocess is：
1), step 2 is carried out according to judging whether to reach interval time 0.5ms and determine) or jump to step 6)；
2), when 0.5ms is reached the interval time, the numerical value of T3 adds 1；
3), according to the value for judging the T3, whether the value determination equal to the T4 carries out step 4) or jump to step 5)；
4), when the value of the T3 is equal to the value of the T4, the value of T3 is reset, closes load, after pointing out load short circuits
Jump to step 02；
5), when the value of the T3 is not equal to the value of the T4, jump to step 02；
6), when 0.5ms is not reached the interval time, jump to step 02.
Compared with immediate technical scheme, the present invention has the advantages that：
Load current is carried out into AD samplings, the sample magnitude of nearest continuous several times is calculated by adopting moving averages algorithm
Art is average, can effectively filter off immediate current spike；Avoid the impact that dash current is judged to load operating condition；
By stepwise judging to load current, working condition that can be in a short period of time to loading is carried out
Comprehensively judge, so as to be protected accordingly, improve real-time and reliability, the need of real-time guard when meeting load faulty
Ask.
Description of the drawings：
The flow chart of the power distribution protection method that Fig. 1 is provided for the present invention.
Specific embodiment：
For a better understanding of the present invention, present disclosure is described further with reference to Figure of description.
The workflow of the power distribution protection method that the present invention is provided is as shown in Figure 1：
S1 sets count value T1 first, and the initial value of T2, T3, T4 is respectively 0,100,0,10；Setting threshold values A, B, C, D's
Current value is respectively 3,166,595,880；
S2 judges that load, whether in blocking, if being in blocking, judges whether to re-power, goes up again
Electricity, upper electric back loading automatic unlocking；
The electric current of S3 sampling loads；
S4 is AD converted to the load current sampled；
S5 averages to 3 current values of continuous acquisition I；
S6 adopts stepped determination methods, the quick working condition for judging load, in time to load to the size of electric current I
Protected.
The concrete determination methods of step S6 are：
1) electric current I is compared with threshold values A, being determined according to comparative result carries out step 2) or step 3)；
2) when electric current I is less than or equal to A, load is closed, after pointing out load open circuit, jumps to step S2；
3) when electric current I is more than A, electric current I is compared with threshold value B, being determined according to comparative result carries out step 4) or
Step 5)；
4) when electric current I is less than or equal to B, load is connected, point out load step S2 to be jumped to after connecting；
5) when electric current I is more than B, electric current I is compared with threshold value C, being determined according to comparative result carries out step 6) or
Step 12)；
6) when electric current I is less than or equal to C, according to judging whether to reach 5ms interval times, (interval time is set for intervalometer
The fixed time, start timing from 0ms every 5ms again), it is determined that carrying out step 7) or step 8)；
7) when 5ms is not up to interval time, jump to step S2；
8) when 5ms is reached interval time, T1=T1+1；
10) or 11) 9) carry out according to judging that whether T1 is determined equal to T2；
10) as T1=T2, the value of T1 is reset, closes load, after pointing out load open circuit, jump to step S2；
11) as T1 ≠ T2, jump to step S2；
12) when electric current I is more than C, electric current I is compared with threshold value D, being determined according to comparative result carries out step 13)
Or step 19)；
13) when electric current I is less than or equal to D, according to judging whether to reach 5ms interval times, (interval time is intervalometer
The time of setting, start timing from 0ms every 5ms again), it is determined that carrying out step 14) or step 15)；
14) when 5ms is not up to interval time, jump to step S2；
15) when 5ms is reached interval time, T3=T3+1；
17) or 18) 16) carry out according to judging that whether T3 is determined equal to T4；
17) as T3=T4, the value of T3 is reset, closes load, after pointing out load open circuit, jump to step S2；
18) as T3 ≠ T4, jump to step S2；
19) when electric current I is more than D, after locking load output, jump to step S2.
Embodiments of the invention are these are only, the present invention is not limited to, it is all in the spirit and principles in the present invention
Within, any modification, equivalent substitution and improvements done etc. are being applied within pending scope of the presently claimed invention.
Claims (3)
1. a kind of power distribution protection method of load, it is characterised in that：Methods described comprises the steps：
S1, according to current sample of the load condition to load；
S2, the load current that AD conversion is sampled；
S3, calculates average I of the load current after AD conversion；
S4, determines according to average I of electric current and load is protected；
Step S1 comprises the steps：
01, count value T1 is set, the initial value of T2, T3, T4 is respectively 0,100,0,10；The initial value difference of threshold value A, B, C, D
For 3,166,595,880；
02, according to whether the load is judged in blocking, it is determined that carrying out step 03 or step 06；
03, when it is described load in blocking when, according to judge it is described load whether re-power determination carry out step 04 or
Step 05；
04, when the load is re-powered, re-power to the load, unlock the electricity loaded described in the load post-sampling
Stream；
05, when the load is not re-powered, jump to the step 02；
06, when the load is not at blocking, the electric current of the load of sampling；
Step S3 includes the average of three electric currents for calculating continuous acquisition；
Step S4 comprises the steps：
001, average I of the electric current is compared with threshold values A, being determined according to comparative result carries out step 002 or step
003；
002, when average I of the electric current is less than or equal to A, closes load, jumps to step 02 after pointing out load open circuit；
003, when average I of the electric current is more than A, average I of electric current and threshold value B is compared, and is determined according to comparative result
Carry out step 004 or step 005；
004, when average I of the electric current is less than or equal to B, connects load, points out load to jump to step 02 after connecting；
005, when average I of the electric current is more than B, average I of electric current and threshold value C is compared, and is determined according to comparative result
Carry out step 006 or step 007；
006, when average I of the electric current is less than or equal to C, carries out the first judgement subprocess；
007, when average I of the electric current is more than C, average I of electric current and threshold value D is compared, and is determined according to comparative result
Carry out step 008 or step 009；
008, when average I of the electric current is less than or equal to D, carries out the second judgement subprocess；
009 when average I of the electric current is more than D, jumps to step 02 after locking load output.
2. the power distribution protection method of a kind of load as claimed in claim 1, it is characterised in that：
In the step 006 first judges that subprocess is：
01), step 02 is carried out according to judging whether to reach interval time 0.5ms and determine) or jump to step 06), 02), work as institute
When stating interval time and reaching 0.5ms, the numerical value of T1 adds 1；
03), according to the value for judging the T1, whether the value determination equal to the T2 carries out step 04) or jump to step 05)；
04), when the value of the T1 is equal to the value of the T2, the value of T1 is reset, closes load, redirected after pointing out load overcurrent
To step 02；
05), when the value of the T1 is not equal to the value of the T2, jump to step 02；
06), when 0.5ms is not reached the interval time, jump to step 02.
3. the power distribution protection method of a kind of load as claimed in claim 1, it is characterised in that：
In the step 008 second judges that subprocess is：
1), step 2 is carried out according to judging whether to reach interval time 0.5ms and determine) or jump to step 6)；
2), when 0.5ms is reached the interval time, the numerical value of T3 adds 1；
3), according to the value for judging the T3, whether the value determination equal to the T4 carries out step 4) or jump to step 5)；
4), when the value of the T3 is equal to the value of the T4, the value of T3 is reset, closes load, redirected after pointing out load short circuits
To step 2)；
5), when the value of the T3 is not equal to the value of the T4, jump to step 2)；
6), when 0.5ms is not reached the interval time, jump to step 2).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410488214.8A CN104269815B (en) | 2014-09-23 | 2014-09-23 | Power distribution protection method for loads |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410488214.8A CN104269815B (en) | 2014-09-23 | 2014-09-23 | Power distribution protection method for loads |
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| Publication Number | Publication Date |
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| CN104269815A CN104269815A (en) | 2015-01-07 |
| CN104269815B true CN104269815B (en) | 2017-04-12 |
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| CN201410488214.8A Expired - Fee Related CN104269815B (en) | 2014-09-23 | 2014-09-23 | Power distribution protection method for loads |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN106706997A (en) * | 2016-11-15 | 2017-05-24 | 捷开通讯(深圳)有限公司 | Current dynamic detection method and device |
| CN110729946A (en) * | 2018-07-16 | 2020-01-24 | 苏州宝时得电动工具有限公司 | Motor torque adjusting method and device |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101452049A (en) * | 2008-12-22 | 2009-06-10 | 华为技术有限公司 | Circuit failure testing method, apparatus and single board |
| CN101599630A (en) * | 2009-06-09 | 2009-12-09 | 深圳和而泰智能控制股份有限公司 | The guard method of resistive AC load short circuit, device and switch |
| CN103337834A (en) * | 2013-06-09 | 2013-10-02 | 常熟市九洲电器设备有限公司 | Overcurrent protection method for motor |
| CN103532090A (en) * | 2013-10-30 | 2014-01-22 | 沈阳君威新能科技有限公司 | Multilevel, online and adjustable overcurrent protection module |
Family Cites Families (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US8031455B2 (en) * | 2007-01-05 | 2011-10-04 | American Power Conversion Corporation | System and method for circuit overcurrent protection |
| US7570465B2 (en) * | 2007-12-19 | 2009-08-04 | Eaton Corporation | Industrial arc fault circuit interrupter and method of detecting arcing conditions |
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2014
- 2014-09-23 CN CN201410488214.8A patent/CN104269815B/en not_active Expired - Fee Related
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101452049A (en) * | 2008-12-22 | 2009-06-10 | 华为技术有限公司 | Circuit failure testing method, apparatus and single board |
| CN101599630A (en) * | 2009-06-09 | 2009-12-09 | 深圳和而泰智能控制股份有限公司 | The guard method of resistive AC load short circuit, device and switch |
| CN103337834A (en) * | 2013-06-09 | 2013-10-02 | 常熟市九洲电器设备有限公司 | Overcurrent protection method for motor |
| CN103532090A (en) * | 2013-10-30 | 2014-01-22 | 沈阳君威新能科技有限公司 | Multilevel, online and adjustable overcurrent protection module |
Non-Patent Citations (1)
| Title |
|---|
| 车辆电动助力转向自动化控制系统过流保护功能设计;程岩等;《城市轨道交通研究》;20120731(第7期);第68-72页 * |
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