CN104979799B - A kind of safeguard of main engine of combustion engine adaptive guard method - Google Patents
A kind of safeguard of main engine of combustion engine adaptive guard method Download PDFInfo
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Abstract
The invention discloses a kind of safeguard of main engine of combustion engine adaptive guard methods, including S1, default P1, P2；S2, in safeguard of main engine of combustion engine operational process, in real time detect main generator exciting current value I1；S3, according to exciting current value I1Protection control is carried out, detailed process is as follows：Work as I1>=P1, but I1Duration when being not up to preset time T 1, start the output power for reducing safeguard of main engine of combustion engine；Work as I1Duration be not up to T1 and I1When ＜ P1, main generator is exported according to normal power；Work as I1Duration be not up to T1 and I1When >=P2, and, then direct locking pulse output, reports exciting current over current fault；Work as I1Duration reach T1 and I1When >=P1, then locking pulse exports, and reports exciting current over current fault.The method of the present invention has many advantages, such as that protection is comprehensive, easy to operate, efficient.
Description
Technical field
The invention mainly relates to diesel locomotives, refer in particular to a kind of safeguard of main engine of combustion engine adaptive guard method.
Background technology
When safeguard of main engine of combustion engine normal operation, when generator output end or output rectifier failure, often draw
It is excessively high or exciting current is excessive to play magnet exciting coil peak voltage, if the duration is longer, frequently can lead to generator output
Hold failure propagation, generator coil scaling loss, while scaling loss energized circuit other equipment.
Currently the mode of the exciting current overcurrent protection of main generator is：When actual exciting current is in duration
More than the protection value of setting, then excitation pulse output is blocked, realizes error protection.The overcurrent of the main generator of Current internal combustion engines vehicle
Current value and voltage value when protection is using to maximum load operating mode are estimated, then in the program of main hair excitation controller
Protection value is set, to accurately measure actual value, then needs technical staff to be observed for a long time with vehicle, when main hair excitation control
The application scenario of device processed（The power of mating main generator or load）When changing, technical staff is needed to be seen again with vehicle
It examines, redesigns new protection value.
In addition, generally there are two types of sides for the setting of the exciting current overcurrent protection value of the excitation controller of current main generator
Formula：
（1）The maximum current that can bear according to excitation controller itself, uniformly sets before manufacture.
（2）Within the scope of the maximum current that excitation controller itself can bear, according to different main generator excitations around
The maximum exciting current value that group can bear, is arranged different protection values, in this fashion, if it is desired to a greater degree of protection master
Generator is arranged protection value in each gear, then needs technical staff for a long time under each gear to exciting current
Into line trace, then each gear is respectively set in a program.
For mode（1）, the starting point of protection is the main hair excitation controller of protection itself, and cannot protect main generator,
When main generator system is abnormal, if exciting current is less than the exciting current that excitation controller itself can be born, no
Protection act can be executed, it is possible to cause exciting current further to expand, so as to cause fault pervasion.The method cannot be according to reality
Main generator is reasonably protected in border application scenario, inadequate to the degree of main generator protection.
For mode（2）, need technical staff for a long time to actually required electric current into line trace, then protection be set again
Value, and protect not comprehensive enough.The method needs prolonged input human resources, of high cost.
Invention content
The technical problem to be solved in the present invention is that：For technical problem of the existing technology, the present invention provides one
Kind defencive function is comprehensive, realizes simple safeguard of main engine of combustion engine adaptive guard method.
In order to solve the above technical problems, technical solution proposed by the present invention is：
A kind of safeguard of main engine of combustion engine adaptive guard method, includes the following steps：
S1, P1, P2 are preset, the excitation electricity that excitation controller can be born in a short time is generated based on wherein P2 ＞ P1, P1
Flow valuve, P2 are the exciting current value for causing main hair excitation controller scaling loss；
S2, in safeguard of main engine of combustion engine operational process, in real time detect main generator exciting current value I1；
S3, according to exciting current value I1Size and duration T protection control carried out to main generator, protection control
Detailed process be：
As exciting current value I1>=P1, but exciting current value I1Duration T ＜ preset time Ts 1 when, start in reduction
The output power of combustion locomotive main generator；
As exciting current value I1Duration T ＜ T1 and I1When ＜ P1, main generator is exported according to normal power；
As exciting current value I1Duration T ＜ T1 and I1When >=P2, and, then direct locking pulse output, reports excitation
Overcurrent failure；
As exciting current value I1Duration T >=T1 and I1When >=P1, then locking pulse exports, and reports exciting current overcurrent
Failure.
As a further improvement of the above technical scheme：
As exciting current value I1>=P1, but exciting current value I1Duration T ＜ T1 when, reduction internal combustion engine car owner hair
The output power value of motor and current increase I1- P1 is directly proportional.
P2=the 1.1*P1.
In step sl, by selecting normal mode of operation or self-studying mode to determine the value of P1 and P2；When selection just
When normal operating mode, P1 and the default value that P2 is system；When selecting self-studying mode, P1 and P2 by self-studying mode from
Learning process obtains.
The process of the self-studying mode is as follows：
S11, selection self-studying mode, and main generator is made to be in full load condition；
S12, in real time detection exciting current value, filter out maximum current value a of the duration more than preset time T 2m；And
And filter out moment maximum current value bm；
S13, a is calculatedmWith bmWeighted average I2, I2=（1-x）*am+x*bm, wherein x is risk factor, 0≤x≤1；
S14, update P1 and P2, updated P1=I2、P1=1.1*I2。
Compared with the prior art, the advantages of the present invention are as follows：
（1）The safeguard of main engine of combustion engine adaptive guard method of the present invention has preferable defencive function, using segmentation
The mode of protection takes the mode for reducing power output to reduce exciting current, works as reduction when reaching first protection value
The mode of power output is invalid, and locking pulse output is carried out when being persistently more than first protection value and is protected, if moment reaches
When second protection value, directly carries out locking pulse output and protected.In the feelings that can protect excitation controller itself
Under condition, it can rationally design protection value according to actual conditions, can not only protect excitation controller, but also main generator can be protected,
The degree of protection improves.
（2）Since itself has the function of self-teaching, two protection values of sectionalised protection can be adaptively calculated out,
It does not need technical staff to observe for a long time, when the product of batch is used in different occasions, it is only necessary to be arranged before manufacture and arrive
Unified default value for different occasions need not go that different values is arranged, and can largely reduce human resources input, also just
In the unitized management of product.
（3）After new protection value is set, when application occasion changes or other users demand is changed
It waits, can also can again be learnt with system reset to default value, there is very high flexibility ratio.
（4）This system can set a protection value according to the actual conditions of diesel locomotive in each gear,
The degree of protection further increases.
Description of the drawings
Fig. 1 is flow chart of the method for the present invention.
Fig. 2 is the structural schematic diagram of the main generator of the present invention.
Fig. 3 is one of the setting schematic diagram of P1 and P2 in the present invention.
Fig. 4 is two of the setting schematic diagram of P1 and P2 in the present invention.
Fig. 5 is three of the setting schematic diagram of P1 and P2 in the present invention.
Specific implementation mode
Below in conjunction with Figure of description and specific embodiment, the invention will be further described.
As shown in Fig. 1 to 5, the safeguard of main engine of combustion engine adaptive guard method of the present embodiment includes the following steps：
S1, P1, P2 are preset, the excitation electricity that excitation controller can be born in a short time is generated based on wherein P2 ＞ P1, P1
Flow valuve, P2 are the exciting current value for causing main hair excitation controller scaling loss；
S2, in safeguard of main engine of combustion engine operational process, in real time detect main generator exciting current value I1；
S3, according to exciting current value I1Size and duration T protection control carried out to main generator, protection control
Detailed process be：
As exciting current value I1>=P1, but exciting current value I1Duration T ＜ preset time Ts 1 when, start in reduction
The output power of combustion locomotive main generator；
As exciting current value I1Duration T ＜ T1 and I1When ＜ P1, main generator is exported according to normal power；
As exciting current value I1Duration T ＜ T1 and I1When >=P2, and, then direct locking pulse output, reports excitation
Overcurrent failure；
As exciting current value I1Duration T >=T1 and I1When >=P1, then locking pulse exports, and reports exciting current overcurrent
Failure.
In the present embodiment, main generator connects the output end as shown in Fig. 2, main hair excitation controller with each control device
It is connected in the Exciting Windings for Transverse Differential Protection of main generator, when the main alternator of rotation has exciting current to flow through, main alternator just has
Three-phase alternating current electricity output uses after three-phase alternating current passes through rectifier rectification into direct current for locomotive traction system.
In the present embodiment, as exciting current value I1>=P1, but exciting current value I1Duration T be not up to preset time
When T1, the output power value and current increase of the safeguard of main engine of combustion engine of reduction（I1-P1）It is directly proportional.
In the present embodiment, due to the seriousness of exciting current overcurrent, P2=1.1*P1 is set as under default situations.
In the present embodiment, in step sl, by selecting normal mode of operation or self-studying mode to determine P1's and P2
Value；When selecting normal mode of operation, P1 and the default value that P2 is system；When selecting self-studying mode, P1 and P2 are by learning by oneself
Self study process in habit pattern obtains.Detailed process is：System starts in application, carrying out model selection first, this pattern is selected
It selects dependent on external man-machine interface, such as display interfaces；When selecting self-studying mode, program meets according to algorithm screening
Actual best protection value；When the learning procedure has been finished, by the best protection value obtained after study and original practical guarantor
Shield value is compared, if protection value does not change, directly jumps out mode of learning（Or directly update protection value）, into Working mould
Formula is executed according to current protection value, if protection value changes, update protection value is asked whether, if selection does not update protection
Value then enters operating mode, is executed according to current protection value, if selection update protection value, by what is obtained after study
Best protection value substitutes original real protection value, is executed according still further to updated protection value.Under mode of learning, in protection value
Before update unconfirmed, protected according to original protection value always.When selecting operating mode, the mistake of study is not executed
Journey is protected according to original protection value, if system, from when not entering mode of learning, protection value if is defaulted as system itself
The maximum value that can be born.
In the present embodiment, the process of self-studying mode is as follows：
S11, selection self-studying mode, and main generator is made to be in full load condition；
S12, in real time detection exciting current value, and the maximum value in actual current value of the calculating prolongeding time more than or equal to T1
amWith moment maximum current value bm；
A, the maximum value in actual current value of the calculating prolongeding time more than or equal to T1.Establish a two-dimensional array, first
Tie up the current value being likely to occur, such as [a1, a2,..., ai..., an], the second dimension is the corresponding flag bit of each current value.If
In learning process, actual current is persistently more than current value a within the period of T1i, then in aiMark is set in corresponding flag bit
Position effectively, then filters out the effective maximum current value a of flag bitm；
B, the maximum value for the current value that moment occurs is calculated.Establish a two-dimensional array, the electric current that the first dimension is likely to occur
Value, such as [b1,b2,…,bi,…,bn], the second dimension is the corresponding flag bit of each current value.If practical in learning process
Electric current is more than current value b in momenti, then in biIt is effective that flag bit is set in corresponding flag bit, and it is effective then to filter out flag bit
Maximum current value bm。
S13, a is calculatedmWith bmWeighted average I2, I2=（1-x）*am+x*bm, wherein x is risk factor, 0≤x≤1；
It can be preset according to risk partiality, if it is desired to play the maximum capacity of system, higher risk can be born, then the setting value of x
Close to 1, maximum may be configured as 1, and then for the setting value of x close to 0, minimum may be configured as 0 on the contrary.
S14, update P1 and P2, updated P1=I2、P1=1.1*I2。
In addition, according to the sampled value of exciting current in the present embodiment, it is as follows using the strategy of P1 and P2：
（1）System for being not carried out mode of learning, or perform mode of learning but will not calculate after mode of learning
The default value of protection value more new system, and by the system after protection valve system reduction, these three situations, system is according to default value
It executes, as shown in Figure 3.P1=I1, P2=1.1I1.The exciting current value that the hair excitation controller energy short time bears based on the value of P1,
The value of P2 is that possible cause the exciting current value of main hair excitation controller device scaling loss.
（2）The load of main generator is all put into, system is operated under operating mode at full capacity, acquires actual excitation electricity
Flow valuve, according to the current value actually occurred in each value duration, it is screened and is sorted.If practical application
Occasion exciting current value it is smaller, the current value I that self study process obtains2With the default value I of system1Relationship as shown in figure 4,
P1= I2, P2=1.1I2.The maximum that input moment may occur in the short time that is supported on that excitation controller is sent out based on the value of P1 is encouraged
Magnetoelectricity flow valuve, the value of P2 are that possible cause the exciting current value of main generator excitation winding scaling loss.
（3）External condition with（2）Under unanimous circumstances, if the occasion exciting current value of practical application is larger, close to system
The default value of system, but when being not above the default value of system, the current value I that self study obtains3With the default value I of system1Relationship
As shown in Figure 5.The input moment that is supported on that excitation controller is generated based on the value of P1 may the short time interior maximum excitation electricity occurred
Flow valuve, the value of P2 are that possible cause the exciting current value of main generator excitation winding scaling loss.
（4）When systematic difference occasion changes, mode of learning can be reentered, changes protection value P1 and P2,
Originally the protection value set can be reset to the initial set value of system by way of system reset.
（5）Above-mentioned protection setting process is in highest gear, feelings of the main generator in oepration at full load just for locomotive
Condition.It damages main generator when the load abnormal for preventing main generator if necessary, prevents from destroying further expansion, then it can be every
Exciting current value under normal circumstances is acquired under one gear, then according to same learning process, is set under each gear
Protection value P1 and P2, this makes it possible to the abnormal conditions for detecting to occur under each gear, protect main hair to the maximum extent
Electric system.
The above is only the preferred embodiment of the present invention, protection scope of the present invention is not limited merely to above-described embodiment,
All technical solutions belonged under thinking of the present invention all belong to the scope of protection of the present invention.It should be pointed out that for the art
For those of ordinary skill, several improvements and modifications without departing from the principles of the present invention should be regarded as the protection of the present invention
Range.
Claims (3)
1. a kind of safeguard of main engine of combustion engine adaptive guard method, which is characterized in that include the following steps：
S1, P1, P2 are preset, the exciting current value that excitation controller can be born in a short time are sent out based on wherein P2 ＞ P1, P1,
P2 is the exciting current value for causing main hair excitation controller scaling loss；
S2, in safeguard of main engine of combustion engine operational process, in real time detect main generator exciting current value I1；
S3, according to exciting current value I1Size and duration T protection control is carried out to main generator, protect the tool of control
Body process is：
As exciting current value I1>=P1, but exciting current value I1Duration T ＜ preset time Ts 1 when, start reduce internal combustion engine
The output power of car owner's generator；
As exciting current value I1Duration T ＜ T1 and I1When ＜ P1, main generator is exported according to normal power；
As exciting current value I1Duration T ＜ T1 and I1When >=P2, then direct locking pulse output, reports exciting current overcurrent
Failure；
As exciting current value I1Duration T >=T1 and I1When >=P1, then locking pulse exports, report exciting current overcurrent event
Barrier；
In step sl, by selecting normal mode of operation or self-studying mode to determine the value of P1 and P2；When the normal work of selection
When operation mode, P1 and the default value that P2 is system；When selecting self-studying mode, P1 and P2 are by the self study in self-studying mode
Process obtains；
The process of the self-studying mode is as follows：
S11, selection self-studying mode, and main generator is made to be in full load condition；
S12, in real time detection exciting current value, filter out maximum current value a of the duration more than preset time T 2m；And it screens
Go out moment maximum current value bm；
S13, a is calculatedmWith bmWeighted average I2, I2=（1-x）*am+x*bm, wherein x is risk factor, 0≤x≤1；
S14, update P1 and P2, updated P1=I2、P2=1.1*I2。
2. safeguard of main engine of combustion engine adaptive guard method according to claim 1, which is characterized in that work as exciting current
Value I1>=P1, but exciting current value I1Duration T ＜ T1 when, the output power value of the safeguard of main engine of combustion engine of reduction with
Current increase I1- P1 is directly proportional.
3. safeguard of main engine of combustion engine adaptive guard method according to claim 1 or 2, which is characterized in that the P2=
1.1*P1。
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| CN102005730B (en) * | 2010-11-11 | 2015-12-09 | 宁波汉浦工具有限公司 | For overload protection arrangement and the method for electric tool |
Family Cites Families (1)
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| JP3914106B2 (en) * | 2002-07-08 | 2007-05-16 | 株式会社日立製作所 | Gas turbine power generation system and control method thereof |
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2015
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| CN1953291A (en) * | 2006-11-22 | 2007-04-25 | 北京四方继保自动化股份有限公司 | A method to realize high precision universal inverse time-limit protection |
| CN102005730B (en) * | 2010-11-11 | 2015-12-09 | 宁波汉浦工具有限公司 | For overload protection arrangement and the method for electric tool |
| CN102710199A (en) * | 2012-06-13 | 2012-10-03 | 江苏苏美达机电产业有限公司 | Generator excitation control system |
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Address after: The age of 412001 in Hunan Province, Zhuzhou Shifeng District Road No. 169 Patentee after: ZHUZHOU CRRC TIMES ELECTRIC Co.,Ltd. Address before: The age of 412001 in Hunan Province, Zhuzhou Shifeng District Road No. 169 Patentee before: ZHUZH CSR TIMES ELECTRIC Co.,Ltd. |