CN104500234A - Heavy-duty gas turbine over-speed protection method and heavy-duty gas turbine over-speed protection device - Google Patents
Heavy-duty gas turbine over-speed protection method and heavy-duty gas turbine over-speed protection device Download PDFInfo
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- CN104500234A CN104500234A CN201410828002.XA CN201410828002A CN104500234A CN 104500234 A CN104500234 A CN 104500234A CN 201410828002 A CN201410828002 A CN 201410828002A CN 104500234 A CN104500234 A CN 104500234A
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Abstract
The invention relates to the technical field of safety monitoring of gas turbines, and in particular to relates to a heavy-duty gas turbine over-speed protection method and a heavy-duty gas turbine over-speed protection device. According to the heavy-duty gas turbine over-speed protection method and the heavy-duty gas turbine over-speed protection device provided by the invention, whether a rotary speed value more than a preset maximum value exists in all rotary speed values or not or whether a rotary speed value smaller than a preset minimum value exists in all the rotary speed values or not when the operation time of the gas turbine is more than a preset time value is judged; and meanwhile, whether a sensor has faults or not and a rotary speed signal has faults or is lost or not is detected by sufficiently utilizing all speed measuring sensors in an over-speed monitoring process, so that the gas turbine over-speed protection accuracy and the gas turbine over-speed protection reliability are greatly improved under the conditions that the gas turbine over-speed protection cost is reduced or the existing cost is kept.
Description
Technical field
The present invention relates to gas turbine safety monitoring technology field, be specifically related to a kind of heavy duty gas turbine overspeed protection method and device.
Background technique
Heavy duty gas turbine (being called for short: combustion engine) is the power generating equipment of High Rotation Speed, rotating speed is the important controling parameters that combustion engine is run, and square being directly proportional of centrifugal force and rotating speed, once the rotating speed limit speed exceeding combustion engine out of control, just may cause the rotating equipment of combustion engine that irreversible destruction occurs, cause huge economic loss and security incident.Ge great combustion engine manufacturer, all to combustion engine overspeed protection enough attention, generally all arranges the speed probe and corresponding protection module that are used for especially carrying out overspeed protection.
Currently used combustion engine overspeed protection means; signal mainly by being gathered by a part of tachogenerator is delivered to turbine control system and is used for carrying out the control of rotating speed and the protection module of protection, and the signal of another part tachogenerator collection delivers to specific rotating speed protection module.Overspeed protection limit value is all provided with in turbine control system and specific rotating speed protection module, the limit value of general specific purpose overspeed protective module is larger than the overspeed protection limit value in turbine control system, if control system monitors rotating speed exceed setting value, combustion engine will be interdicted; When control system overspeed protection baulk, this specific purpose overspeed protective module can interdict combustion engine when rotating speed exceedes its limit value.Generally two redundancy overspeed protection structure is formed to combustion engine.
Technique scheme is adopted to carry out the overspeed protection of combustion engine; in order to ensure that the accuracy of monitoring result must obtain the signal of two groups of different tachogenerators for two groups of similar two redundancy protecting modules; and to measure high rotating speed sensor used be contactless hall effect sensor; expensive; not only the higher but also sensor failure of cost is also not easy to find, and then causes effectively to carry out combustion engine overspeed protection.
Summary of the invention
Higher and the ND defect of tachogenerator fault for testing cost in prior art, the invention provides a kind of heavy duty gas turbine overspeed protection method and device.
On the one hand, a kind of heavy duty gas turbine overspeed protection method provided by the invention, comprising:
Obtain multiple tachometer value that the multiple tachogenerators be arranged in combustion engine gather and described combustion engine working time;
Judge in all tachometer values, whether to there is the tachometer value being greater than preset maximum value, if there is the tachometer value being greater than preset maximum value, interdict combustion engine;
Or,
When described combustion engine is greater than preset time value working time, judges in all tachometer values, whether to there is the tachometer value being less than predetermined minimum, if there is the tachometer value being less than predetermined minimum, interdict combustion engine.
Further, start frequency variator SFC (Static FrequencyConverter) according to described combustion engine and determine described preset time value.
Further, described method also comprises:
Judge whether that the difference that there are any two tachometer values is greater than preset error value, if the difference that there are any two tachometer values is greater than preset error value, interdict combustion engine.
Further, after the step of the tachometer value that described acquisition speed probe gathers and combustion engine working time, comprising:
Pretreatment is carried out to described multiple tachometer value, according to default packet count, described multiple tachometer value is divided into groups, the velocity amplitude in each group is got intermediate value as this group tachometer value.
Accordingly, the present invention also provides a kind of heavy duty gas turbine overspeed governor switch, comprising:
Acquisition module, for obtaining multiple tachometer value that the multiple tachogenerators be arranged in combustion engine gather and described combustion engine working time;
Whether purpose overspeed protective module, exist for judging the tachometer value being greater than preset maximum value in all tachometer values, if there is the tachometer value being greater than preset maximum value, interdict combustion engine;
Dropout module, for when described combustion engine is greater than preset time value working time, judges whether there is the tachometer value being less than predetermined minimum in all tachometer values, if there is the tachometer value being less than predetermined minimum, interdicts combustion engine.
Further, start frequency variator SFC according to described combustion engine and determine described preset time value.
Further, described device also comprises:
Signal fault module, for judging whether that the difference that there are any two tachometer values is greater than preset error value, if the difference that there are any two tachometer values is greater than preset error value, interdicts combustion engine.
Further, described device also comprises:
Pre-processing module, for carrying out pretreatment to described multiple tachometer value, divides into groups to described multiple tachometer value according to default packet count, the velocity amplitude in each group is got intermediate value as this group tachometer value.
On the other hand, present invention also offers a kind of heavy duty gas turbine overspeed monitoring system, described system comprises overspeed governor switch described in above-mentioned any one and the independent electrical overspeed protected location arranged, and or door;
Wherein, described overspeed governor switch is connected respectively with described electrical overspeed protected location or an input end of door.
Further, the described independent electrical overspeed protected location arranged comprises: three monitor speed modules, six overspeed relaies, two three get two logic modules, one or and test module;
Be connected with tachogenerator for each described monitor speed module input, output terminal connects two overspeed relaies, and described two overspeed relaies connect the input end that different described three get two logic modules respectively;
Described two three output terminals getting two logic modules connect input end that is described or door respectively;
Described test module respectively with monitor speed model calling, for testing the validity of described monitor speed module.
A kind of heavy duty gas turbine overspeed protection method provided by the invention and device; all tachogenerators can be made full use of and monitoring in the process exceeded the speed limit; simultaneously whether detecting sensor breaks down, whether tach signal break down or lose, and is reducing combustion engine overspeed protection monitoring cost or is significantly improve accuracy rate and the reliability of combustion engine overspeed protection monitoring under keeping the prerequisite of existing cost.
Accompanying drawing explanation
Can understanding the features and advantages of the present invention clearly by reference to accompanying drawing, accompanying drawing is schematic and should not be construed as and carry out any restriction to the present invention, in the accompanying drawings:
Fig. 1 is the schematic flow sheet of one embodiment of the invention medium and heavy gas turbine overspeed protection method;
Fig. 2 is the structural representation of the medium and heavy gas turbine overspeed governor switch of one embodiment of the invention;
Fig. 3 is the structural representation of one embodiment of the invention medium and heavy gas turbine overspeed protection supervisory system;
Fig. 4 is the structural representation of the independent electrical overspeed protected location arranged in one embodiment of the invention.
Embodiment
Now in conjunction with the accompanying drawings and embodiments technical solution of the present invention is further elaborated.
Fig. 1 shows the schematic flow sheet of a kind of heavy duty gas turbine overspeed protection method in the present embodiment, and as shown in Figure 1, a kind of heavy duty gas turbine overspeed protection method method that the present embodiment provides, comprising:
S1, obtains multiple tachometer value that the multiple tachogenerators be arranged in combustion engine gather and described combustion engine working time.
S2, judges whether there is the tachometer value being greater than preset maximum value in all tachometer values, if there is the tachometer value being greater than preset maximum value, interdicts combustion engine.
S3, when described combustion engine is greater than preset time value working time, judges whether there is the tachometer value being less than predetermined minimum in all tachometer values, if there is the tachometer value being less than predetermined minimum, interdicts combustion engine.
Wherein, start frequency variator SFC according to described combustion engine and determine described preset time value.
In normal operation; after combustion engine reaches preset time value T starting time; rotating speed can reach predetermined minimum; if there is the situation being less than the tachometer value of predetermined minimum in the tachogenerator tachometer value obtained after the combustion engine startup optimization time reaches preset time value T; then sensor rotation speed dropout is described, may is because sensing station, power supply or transmission line break down and cause, there will not be hypervelocity for protecting combustion engine to greatest extent; should shutdown inspection, export blocking combustion engine signal.
Cannot the defect of Timeliness coverage combustion engine hypervelocity in order to overcome that detection that tachogenerator fault or signal fault cause is inaccurate, described method also comprises step S4:
S4, judges whether that the difference that there are any two tachometer values is greater than preset error value, if the difference that there are any two tachometer values is greater than preset error value, interdicts combustion engine.
In combustion engine running; the combustion engine tachometer value that different tachogenerator collects theoretically should be equal; in actual testing process; due to the trueness error existed in local environment difference or different tachogenerator working process; the combustion engine tachometer value that different tachogenerator collects allows to there is certain error; if but described error is beyond the margin of error allowed; then illustrate that having tachogenerator to there occurs fault cannot accurate acquisition tachometer value or tach signal break down; need shutdown inspection equally, export blocking combustion engine signal.
For example, general preset error value is set as 30r/min, more than 30r/min, the tachometer value deviation collected when any two tachogenerators then illustrates that wherein one of them tachogenerator breaks down or tach signal fault.
It should be noted that, three kinds of testing processes that described S2, S3, S4 provide are parallel from decision logic carries out, and needs to interdict combustion engine as long as wherein there is a process to detect, then final output interdicts combustion engine signal.In this enforcement in order to clearly technological scheme is described so given a kind of enforcement order specifically, described in specific implementation process, S2, S3, S4 do not need to perform in strict accordance with the order given by the present embodiment, and the present embodiment is not limited in any way claim.
Further, in the present embodiment, in order to reduce the impact that error is brought, pretreatment can be carried out to described tachometer value after the tachometer value obtaining speed probe collection, also comprising after S1:
S1a, carries out pretreatment to described multiple tachometer value, divides into groups to described multiple tachometer value according to default packet count, the velocity amplitude in each group is got intermediate value as this group tachometer value.
Accordingly, as shown in Figure 2, the present embodiment also provides a kind of heavy duty gas turbine overspeed governor switch, comprising:
Acquisition module 101, for obtaining multiple tachometer value that the multiple tachogenerators be arranged in combustion engine gather and described combustion engine working time;
Whether purpose overspeed protective module 102, exist for judging the tachometer value being greater than preset maximum value in all tachometer values, if there is the tachometer value being greater than preset maximum value, interdict combustion engine;
Dropout module 103, for when described combustion engine is greater than preset time value working time, judges whether there is the tachometer value being less than predetermined minimum in all tachometer values, if there is the tachometer value being less than predetermined minimum, interdicts combustion engine.
Further, start frequency variator SFC according to described combustion engine and determine described preset time value.
Further, described device also comprises:
Signal fault module, for judging whether that the difference that there are any two tachometer values is greater than preset error value, if the difference that there are any two tachometer values is greater than preset error value, interdicts combustion engine.
Further, described device also comprises:
Pre-processing module, for carrying out pretreatment to described multiple tachometer value, divides into groups to described multiple tachometer value according to default packet count, the velocity amplitude in each group is got intermediate value as this group tachometer value.
A kind of heavy duty gas turbine overspeed protection method that the present embodiment provides and device; all tachogenerators can be made full use of and monitoring in the process exceeded the speed limit; simultaneously whether detecting sensor breaks down, whether tach signal break down or lose, and is reducing combustion engine overspeed protection monitoring cost or is significantly improve accuracy rate and the reliability of combustion engine overspeed protection monitoring under keeping the prerequisite of existing cost.
On the other hand, as shown in Figure 3, the present embodiment additionally provides a kind of heavy duty gas turbine overspeed monitoring system, it is characterized in that, described system comprises overspeed governor switch described in above-mentioned any one 1 and the independent electrical overspeed protected location 2 arranged, and or door 3;
Wherein, described overspeed governor switch 1 is connected respectively with described electrical overspeed protected location 2 or an input end of door 3.
Further, as shown in Figure 4, the described independent electrical overspeed protected location 2 arranged comprises: three monitor speed modules, 201, six overspeed relaies 202, two three get two logic module 203, or 205 and test module 204;
Be connected with tachogenerator for each described monitor speed module 201 input end, output terminal connects two overspeed relaies 202, and described two overspeed relaies 202 connect the input end that different described three get two logic modules 203 respectively;
Described two three output terminals getting two logic modules 203 connect input end that is described or door 205 respectively.
For example, three monitor speed modules 201 accept the tachometer value of tachogenerator collection respectively, if wherein certain monitor speed module 201 has detected that tach signal is greater than default maximum (top) speed value, then drive two overspeed relaies 202 action be connected with this monitor speed module 201.When described three get two logic modules 203 and detect in three connected overspeed relaies 202 to have at least two overspeed relaies 202 that action occurs, then export blocking combustion engine signal.
Described test module 204 is connected with monitor speed module 201 respectively, for testing the validity of described monitor speed module 201.
Test module 204 sends to monitor speed module 201 tach signal that test frequency signal substitutes input one by one, if test frequency signal is greater than the preset maximum value of rotating speed, then tested monitor speed module 201 should return overspeed signal, if test frequency signal is less than the preset maximum value of rotating speed, then there is not overspeed signal in tested monitor speed module 201.Once detect that monitor speed module 201 breaks down in combustion engine running, then send fault warning.
It should be noted that, in specific implementation process, the rotating speed preset maximum value of the independent electrical overspeed protected location arranged can be a bit larger tham the preset maximum value of described overspeed governor switch, so just can ensure when hypervelocity occurs combustion engine, first judged by described overspeed governor switch, described overspeed governor switch is main overspeed protection; Once described overspeed governor switch fails normally to interdict combustion engine; combustion engine rotating speed continues the preset maximum value rising and then can exceed the independent electrical overspeed protected location arranged; at this moment electrical overspeed protected location plays a role blocking combustion engine, for combustion engine overspeed protection provides twice protective barrier.
A kind of heavy duty gas turbine overspeed monitoring system that the present embodiment provides; above-mentioned overspeed governor switch and electrical overspeed protected location is adopted to establish twice combustion engine overspeed protection barrier; and described overspeed governor switch can make full use of all tachogenerators and monitor in the process exceeded the speed limit; simultaneously whether detecting sensor breaks down, whether tach signal break down or lose, and is reducing combustion engine overspeed protection monitoring cost or is significantly improve accuracy rate and the reliability of combustion engine overspeed protection monitoring under keeping the prerequisite of existing cost.
Although describe embodiments of the present invention by reference to the accompanying drawings, but those skilled in the art can make various modifications and variations without departing from the spirit and scope of the present invention, such amendment and modification all fall into by within claims limited range.
Claims (10)
1. a heavy duty gas turbine overspeed protection method, is characterized in that, described method comprises:
Obtain multiple tachometer value that the multiple tachogenerators be arranged in combustion engine gather and described combustion engine working time;
Judge in all tachometer values, whether to there is the tachometer value being greater than preset maximum value, if there is the tachometer value being greater than preset maximum value, interdict combustion engine;
Or,
When described combustion engine is greater than preset time value working time, judges in all tachometer values, whether to there is the tachometer value being less than predetermined minimum, if there is the tachometer value being less than predetermined minimum, interdict combustion engine.
2. method according to claim 1, is characterized in that, starts frequency variator SFC determine described preset time value according to described combustion engine.
3. method according to claim 1, is characterized in that, described method also comprises:
Judge whether that the difference that there are any two tachometer values is greater than preset error value, if the difference that there are any two tachometer values is greater than preset error value, interdict combustion engine.
4. the method according to any one of claims 1 to 3, is characterized in that, after the step of the tachometer value that described acquisition speed probe gathers and combustion engine working time, comprising:
Pretreatment is carried out to described multiple tachometer value, according to default packet count, described multiple tachometer value is divided into groups, the velocity amplitude in each group is got intermediate value as this group tachometer value.
5. a heavy duty gas turbine overspeed governor switch, is characterized in that, described device comprises:
Acquisition module, for obtaining multiple tachometer value that the multiple tachogenerators be arranged in combustion engine gather and described combustion engine working time;
Whether purpose overspeed protective module, exist for judging the tachometer value being greater than preset maximum value in all tachometer values, if there is the tachometer value being greater than preset maximum value, interdict combustion engine;
Dropout module, for when described combustion engine is greater than preset time value working time, judges whether there is the tachometer value being less than predetermined minimum in all tachometer values, if there is the tachometer value being less than predetermined minimum, interdicts combustion engine.
6. device according to claim 5, is characterized in that, starts frequency variator SFC determine described preset time value according to described combustion engine.
7. device according to claim 5, is characterized in that, described device also comprises:
Signal fault module, for judging whether that the difference that there are any two tachometer values is greater than preset error value, if the difference that there are any two tachometer values is greater than preset error value, interdicts combustion engine.
8. the device according to any one of claim 5 to 7, is characterized in that, described device also comprises:
Pre-processing module, for carrying out pretreatment to described multiple tachometer value, divides into groups to described multiple tachometer value according to default packet count, the velocity amplitude in each group is got intermediate value as this group tachometer value.
9. a heavy duty gas turbine overspeed monitoring system, is characterized in that, described system comprises overspeed governor switch described in any one of claim 5 to 7 and the independent electrical overspeed protected location arranged, and or door;
Wherein, described overspeed governor switch is connected respectively with described electrical overspeed protected location or an input end of door.
10. system according to claim 9, is characterized in that, the described independent electrical overspeed protected location arranged comprises: three monitor speed modules, six overspeed relaies, two three get two logic modules, one or and test module;
Be connected with tachogenerator for each described monitor speed module input, output terminal connects two overspeed relaies, and described two overspeed relaies connect the input end that different described three get two logic modules respectively;
Described two three output terminals getting two logic modules connect input end that is described or door respectively;
Described test module respectively with monitor speed model calling, for testing the validity of described monitor speed module.
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| CN201410828002.XA CN104500234A (en) | 2014-12-26 | 2014-12-26 | Heavy-duty gas turbine over-speed protection method and heavy-duty gas turbine over-speed protection device |
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| CN201410828002.XA CN104500234A (en) | 2014-12-26 | 2014-12-26 | Heavy-duty gas turbine over-speed protection method and heavy-duty gas turbine over-speed protection device |
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| CN110702948A (en) * | 2019-10-25 | 2020-01-17 | 中国科学院工程热物理研究所 | Method and device for processing signal fault of double-rotating-speed sensor of gas turbine |
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| CN114017183A (en) * | 2021-11-09 | 2022-02-08 | 唐山行世科技有限公司 | Triple-redundancy overspeed protection device for gas turbine protection |
| CN115387917A (en) * | 2022-09-22 | 2022-11-25 | 国核自仪系统工程有限公司 | FPGA-based machine fault detection method, system, equipment and medium |
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Application publication date: 20150408 |