CN104979799A - Locomotive main generator self-adaptive protection method - Google Patents
Locomotive main generator self-adaptive protection method Download PDFInfo
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- CN104979799A CN104979799A CN201510355970.8A CN201510355970A CN104979799A CN 104979799 A CN104979799 A CN 104979799A CN 201510355970 A CN201510355970 A CN 201510355970A CN 104979799 A CN104979799 A CN 104979799A
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Abstract
The invention discloses a locomotive main generator self-adaptive protection method. The method comprises the steps that S1, P1 and P2 are preset; S2, in a locomotive main generator running process, the excitation current value I1 of a main generator is detected in real time; and S3, according to excitation current value I1, protection control is carried out. According to the step of S3, if I1 is more than or equal to P1 and the duration of I1 does not reach preset time T1, the output power of the locomotive main generator starts to be reduced; if the duration of I1 does not reach T1 and I1 is less than P1, the main generator carries out normal power output; if the duration of I1 does not reach T1 and I1 is more than or equal to P2, pulse output is directly blocked, and an excitation current overcurrent fault is reported; and if the duration of I1 reaches T1 and I1 is more than or equal to P1, pulse output is blocked, and the excitation current overcurrent fault is reported. The method provided by the invention has the advantages of comprehensive protection, easy operation, high efficiency and the like.
Description
Technical field
The present invention relates generally to diesel locomotive, refers 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 normally runs; when generator output end or output rectifier fault; magnet exciting coil peak voltage often can be caused too high; or exciting current is excessive; if the duration is longer; often cause generator output end failure propagation, generator coil scaling loss, simultaneously other equipment of scaling loss energized circuit.
The mode of the exciting current overcurrent protection of current main generator is: when the exciting current of reality exceedes the protection value of setting in the time period continued, then block excitation pulse and export, realize error protection.The overcurrent protection of the main generator of Current internal combustion engines car adopts to be estimated current value during maximum load operating mode and magnitude of voltage; then protection value is set main sending out in the program of excitation controller; to measure actual value exactly; technical staff is then needed to observe with car for a long time; when the main application scenario (supporting main generator or the power of load) sending out excitation controller changes; need technical staff again to observe with car, redesign new protection value.
In addition, the arranging of exciting current overcurrent protection value of the excitation controller of current main generator generally has two kinds of modes:
(1) according to the maximum current that excitation controller itself can bear, before dispatching from the factory, unification sets.
(2) within the scope of the maximum current that can bear at excitation controller itself; according to the maximum exciting current value that different main generator excitation windings can bear; different protection values is set; in this fashion; if think to protect main generator greatly; protection value is set at each gear, then needs technical staff to follow the tracks of exciting current under each gear for a long time, then in a program each gear is arranged respectively.
For mode (1); the starting point of protection is the main excitation controller of protection itself; and main generator can not be protected; when main generator system occurs abnormal; if exciting current is less than the exciting current that excitation controller itself can bear; then can not perform protection act, likely cause exciting current to expand further, thus causing trouble diffusion.The method reasonably can not protect main generator according to practical application, inadequate to the degree of main generator protection.
For mode (2), need technical staff to follow the tracks of the electric current needed for reality for a long time, and then protection value is set, and protection is comprehensive not.The method needs to drop into human resources for a long time, and cost is high.
Summary of the invention
The technical problem to be solved in the present invention is just: the technical problem existed for prior art, the invention provides a kind of defencive function comprehensively, realize simple safeguard of main engine of combustion engine adaptive guard method.
For solving the problems of the technologies described above, the technical scheme that the present invention proposes is:
A kind of safeguard of main engine of combustion engine adaptive guard method, comprises the following steps:
S1, default P1, P2, wherein P2 > P1, P1 are the main exciting current value sent out excitation controller and can bear at short notice, and P2 causes the main exciting current value sending out excitation controller scaling loss;
S2, in safeguard of main engine of combustion engine running, detect in real time the exciting current value I of main generator
1;
S3, according to exciting current value I
1size and duration T protecting control is carried out to main generator, the detailed process of protecting control is:
As exciting current value I
1>=P1, but exciting current value I
1duration T < preset time T 1 time, start the power output reducing safeguard of main engine of combustion engine;
As exciting current value I
1duration T < T1 and I
1during < P1, main generator exports according to normal power;
As exciting current value I
1duration T < T1 and I
1during>=P2, and then directly locking pulse exports, report exciting current over current fault;
As exciting current value I
1duration T>=T1 and I
1during>=P1, then locking pulse exports, report exciting current over current fault.
Further improvement as technique scheme:
As exciting current value I
1>=P1, but exciting current value I
1duration T < T1 time, the output power value of the safeguard of main engine of combustion engine of reduction and current increase I
1-P1 is directly proportional.
Described P2=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 selecting normal mode of operation, P1 and P2 is the default value of system; When selecting self-studying mode, P1 and P2 is obtained by the self study process in self-studying mode.
The process of described self-studying mode is as follows:
S11, selection self-studying mode, and make main generator be in full load condition;
S12, in real time detection exciting current value, filter out the lowest high-current value a that the duration is greater than preset time T 2
m; And filter out moment lowest high-current value b
m;
S13, calculating a
mwith b
mweighted average I
2, I
2=(1-x) * a
m+ x*b
m, wherein x is risk factor, 0≤x≤1;
S14, renewal P1 and P2, the P1=I after renewal
2, P1=1.1*I
2.
Compared with prior art, the invention has the advantages that:
(1) safeguard of main engine of combustion engine adaptive guard method of the present invention; there is good defencive function; adopt the mode of sectionalised protection; when reaching first protection value; take the mode reducing power stage to reduce exciting current, when the mode reducing power stage is invalid, carry out locking pulse output when continuing to be greater than first protection value and protect; if when arriving second protection value instantaneously, directly carry out locking pulse output and protect.When excitation controller itself can be protected, can according to actual conditions, appropriate design protection value, both can protect excitation controller, can protect main generator again, and the degree of protection improves.
(2) owing to itself having the function of self-teaching; two protection values of sectionalised protection can be calculated adaptively; technical staff is not needed to observe for a long time; when the product of batch is used in different occasions; only need before dispatching from the factory, be set to unified default value; do not need to go to arrange different values for different occasions, human resources can be reduced in a large number and drop into, be convenient to the unitized management of product yet.
(3) after new protection value is set, when application occasion changes or other user's requests change time, can system reset to default value, also again can learn, there is very high flexibility ratio.
(4) native system can according to the actual conditions of diesel locomotive, and can set a protection value at each gear, the degree of protection improves further.
Accompanying drawing explanation
Fig. 1 is method flow diagram of the present invention.
Fig. 2 is the structural representation of 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 the setting schematic diagram two of P1 and P2 in the present invention.
Fig. 5 is the setting schematic diagram three of P1 and P2 in the present invention.
Embodiment
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, comprises the following steps:
S1, default P1, P2, wherein P2 > P1, P1 are the main exciting current value sent out excitation controller and can bear at short notice, and P2 causes the main exciting current value sending out excitation controller scaling loss;
S2, in safeguard of main engine of combustion engine running, detect in real time the exciting current value I of main generator
1;
S3, according to exciting current value I
1size and duration T protecting control is carried out to main generator, the detailed process of protecting control is:
As exciting current value I
1>=P1, but exciting current value I
1duration T < preset time T 1 time, start the power output reducing safeguard of main engine of combustion engine;
As exciting current value I
1duration T < T1 and I
1during < P1, main generator exports according to normal power;
As exciting current value I
1duration T < T1 and I
1during>=P2, and then directly locking pulse exports, report exciting current over current fault;
As exciting current value I
1duration T>=T1 and I
1during>=P1, then locking pulse exports, report exciting current over current fault.
In the present embodiment, the connection of main generator and each control device as shown in Figure 2, the main output sending out excitation controller is connected in the excitation winding of main generator, when the main alternator rotated has exciting current to flow through, main alternator just has three-phase alternating current to export, three-phase alternating current after rectifier rectification becomes direct current, for locomotive traction system.
In the present embodiment, as exciting current value I
1>=P1, but exciting current value I
1duration T when not reaching preset time T 1, the output power value of the safeguard of main engine of combustion engine of reduction and current increase (I
1-P1) be directly proportional.
In the present embodiment, due to the seriousness of exciting current overcurrent, under default situations, be set to P2=1.1*P1.
In the present embodiment, in step sl, by selecting normal mode of operation or self-studying mode to determine the value of P1 and P2; When selecting normal mode of operation, P1 and P2 is the default value of system; When selecting self-studying mode, P1 and P2 is obtained by the self study process in self-studying mode.Detailed process is: when system starts to apply, and first carries out model selection, and this model selection depends on outside man-machine interface, such as display interfaces, when selecting self-studying mode, program screens realistic best protection value according to algorithm, when the learning procedure has been finished, the best protection value drawn after study and original real protection value are compared, if protection value does not change, directly jump out mode of learning (or directly upgrading protection value), enter mode of operation, perform according to current protection value, if protection value changes, then inquire and whether upgrade protection value, protection value is not upgraded if select, then enter mode of operation, perform according to current protection value, protection value is upgraded if select, then the best protection value drawn after study is substituted original real protection value, perform according to the protection value after renewal again.Under mode of learning, before protection is worth renewal unconfirmed, protect according to original protection value always.When selecting mode of operation, do not perform the process of study, protect according to original protection value, if when system never enters mode of learning, protection value is then defaulted as the maximum that system itself can be born.
In the present embodiment, the process of self-studying mode is as follows:
S11, selection self-studying mode, and make main generator be in full load condition;
S12, in real time detection exciting current value, and calculating prolongeding time is more than or equal to the maximum a in the actual current value of T1
mwith moment lowest high-current value b
m;
A, calculating prolongeding time are more than or equal to the maximum in the actual current value of T1.Set up a two-dimensional array, first ties up the current value that may occur, such as [a
1, a
2,, a
i..., a
n], the second dimension is the flag bit that each current value is corresponding.If in learning process, actual current continues to be greater than current value a within the time period of T1
i, then at a
ithe corresponding mid-flag bit of flag bit is effective, then filters out the effective lowest high-current value a of flag bit
m;
The maximum of the current value that b, calculating occur instantaneously.Set up a two-dimensional array, first ties up the current value that may occur, such as [b
1, b
2..., b
i..., b
n], the second dimension is the flag bit that each current value is corresponding.If in learning process, actual current is being greater than current value b instantaneously
i, then at b
ithe corresponding mid-flag bit of flag bit is effective, then filters out the effective lowest high-current value b of flag bit
m.
S13, calculating a
mwith b
mweighted average I
2, I
2=(1-x) * a
m+ x*b
m, wherein x is risk factor, 0≤x≤1; Can preset according to risk partiality, to ask the maximum capacity of performance system, can bear higher risk, then the settings of x are close to 1, are maximumly set to 1, and then the settings of x are close to 0 on the contrary, and most I is set to 0.
S14, renewal P1 and P2, the P1=I after renewal
2, P1=1.1*I
2.
In addition, according to the sampled value of exciting current in the present embodiment, the strategy of application P1 and P2 is as follows:
(1) for the system not performing mode of learning; or perform mode of learning but the default value of protection value renewal system will do not calculated after mode of learning, and by the system after the reduction of protection valve system, these three kinds of situations; system performs according to default value, as shown in Figure 3.P1=I
1，P2=1.1I
1。The value of P1 is the exciting current value of bearing a main excitation controller energy short time, and the value of P2 is possible cause the main exciting current value sending out excitation controller device scaling loss.
(2) load of main generator all dropped into, system works, under fully loaded operating mode, gathers actual exciting current value, according to the time that the current value of reality appearance continues in each value, screens and sort to it.If the occasion exciting current value of practical application is less, the current value I that self study process obtains
2with the default value I of system
1relation as shown in Figure 4, P1=I
2, P2=1.1I
2.The value of P1 is the maximum exciting current value that the main load sending out excitation controller may occur in the short time in input moment, and the value of P2 is the exciting current value that possible cause main generator excitation winding scaling loss.
(3) when external condition is consistent with (2), if the occasion exciting current value of practical application is comparatively large, close to the default value of system, but when not exceeding the default value of system, the current value I that self study obtains
3with the default value I of system
1relation as shown in Figure 5.The value of P1 is the maximum exciting current value that the main load sending out excitation controller may occur in the short time in input moment, and the value of P2 is the exciting current value that possible cause main generator excitation winding scaling loss.
(4) when systematic difference occasion changes, can mode of learning be reentered, change protection value P1 and P2, also by the mode of system reset, the protection value originally set can be reset to the initial set value of system.
(5) above-mentioned protection assignment procedure is only in most high tap position for locomotive, and main generator is in the situation of oepration at full load.If damage main generator when needing the load abnormal preventing main generator; prevent from destroying further expansion; exciting current value under normal circumstances then can be gathered under each gear; then according to same learning process; set the protection value P1 under each gear and P2; the abnormal conditions occurred under this makes it possible to detect each gear, protect main generator system to greatest extent.
Below be only the preferred embodiment of the present invention, protection scope of the present invention be not only confined to above-described embodiment, all technical schemes belonged under thinking of the present invention all belong to protection scope of the present invention.It should be pointed out that for those skilled in the art, some improvements and modifications without departing from the principles of the present invention, should be considered as protection scope of the present invention.
Claims (5)
1. a safeguard of main engine of combustion engine adaptive guard method, is characterized in that, comprises the following steps:
S1, default P1, P2, wherein P2 > P1, P1 are the main exciting current value sent out excitation controller and can bear at short notice, and P2 causes the main exciting current value sending out excitation controller scaling loss;
S2, in safeguard of main engine of combustion engine running, detect in real time the exciting current value I of main generator
1;
S3, according to exciting current value I
1size and duration T protecting control is carried out to main generator, the detailed process of protecting control is:
As exciting current value I
1>=P1, but exciting current value I
1duration T < preset time T 1 time, start the power output reducing safeguard of main engine of combustion engine;
As exciting current value I
1duration T < T1 and I
1during < P1, main generator exports according to normal power;
As exciting current value I
1duration T < T1 and I
1during>=P2, and then directly locking pulse exports, report exciting current over current fault;
As exciting current value I
1duration T>=T1 and I
1during>=P1, then locking pulse exports, report exciting current over current fault.
2. safeguard of main engine of combustion engine adaptive guard method according to claim 1, is characterized in that, as exciting current value I
1>=P1, but exciting current value I
1duration T < T1 time, the output power value of the safeguard of main engine of combustion engine of reduction and current increase I
1-P1 is directly proportional.
3. safeguard of main engine of combustion engine adaptive guard method according to claim 1 and 2, is characterized in that, described P2=1.1*P1.
4. safeguard of main engine of combustion engine adaptive guard method according to claim 1 and 2, is characterized in that, in step sl, by selecting normal mode of operation or self-studying mode to determine the value of P1 and P2; When selecting normal mode of operation, P1 and P2 is the default value of system; When selecting self-studying mode, P1 and P2 is obtained by the self study process in self-studying mode.
5. safeguard of main engine of combustion engine adaptive guard method according to claim 4, it is characterized in that, the process of described self-studying mode is as follows:
S11, selection self-studying mode, and make main generator be in full load condition;
S12, in real time detection exciting current value, filter out the lowest high-current value a that the duration is greater than preset time T 2
m; And filter out moment lowest high-current value b
m;
S13, calculating a
mwith b
mweighted average I
2, I
2=(1-x) * a
m+ x*b
m, wherein x is risk factor, 0≤x≤1;
S14, renewal P1 and P2, the P1=I after renewal
2, P1=1.1*I
2.
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|---|---|---|---|
| CN201510355970.8A CN104979799B (en) | 2015-06-25 | 2015-06-25 | A kind of safeguard of main engine of combustion engine adaptive guard method |
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|---|---|---|---|
| CN201510355970.8A CN104979799B (en) | 2015-06-25 | 2015-06-25 | A kind of safeguard of main engine of combustion engine adaptive guard method |
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| CN104979799B CN104979799B (en) | 2018-08-14 |
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|---|---|---|---|---|
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| 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 |
| CN104332941A (en) * | 2014-10-31 | 2015-02-04 | 华中电网有限公司 | Staged current protecting setting method and generator model |
-
2015
- 2015-06-25 CN CN201510355970.8A patent/CN104979799B/en active Active
Patent Citations (5)
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|---|---|---|---|---|
| US20040003594A1 (en) * | 2002-07-08 | 2004-01-08 | Masaya Ichinose | Combustion turbine power generation system and method of controlling the same |
| 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 |
| CN102005730A (en) * | 2010-11-11 | 2011-04-06 | 陈会甫 | Overload protection device and 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 |
| CN104332941A (en) * | 2014-10-31 | 2015-02-04 | 华中电网有限公司 | Staged current protecting setting method and generator model |
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| Title |
|---|
| 李化等: "内燃机车新型辅机控制装置设计", 《机车电传动》 * |
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| CN104979799B (en) | 2018-08-14 |
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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. |