CN104018894B - The check processing method of electrohydraulic steam turbine controlling system pulsatile impact - Google Patents
The check processing method of electrohydraulic steam turbine controlling system pulsatile impact Download PDFInfo
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Abstract
The check processing method of electrohydraulic steam turbine controlling system pulsatile impact comprises: receive and detect a pulsatile impact instruction, reduces steam-turbine unit power, turns down the servo valve in all modulating valve groups, until pulsatile impact disappears; After closing main stop valve wherein in a modulating valve group and servo valve, the main stop valve be closed described in maintenance in modulating valve group is closed, and the servo valve be closed described in reopening in modulating valve group, the aperture of this servo valve is increased gradually, until pulsatile impact reappears described being closed on the servo valve that reopens in modulating valve group; Receiving and eliminate pulsatile impact instruction, there is the described dead area compensation parameter being closed the proportional valve amplifier of the servo valve reopened in modulating valve group of pulsatile impact in adjustment, until pulsatile impact disappears.This check processing method simple practical of the present invention, accuracy rate is high, cost is low, can eliminate the source of trouble completely, the safety reliability of cost-saving effective raising unit.
Description
Technical field
The present invention relates to plant maintenance field, particularly the check processing method of steam turbine for nuclear power station electrohydraulic control system pulsatile impact.
Background technique
In electrohydraulic steam turbine controlling system; when adoption rate valve carrys out the oil engine valve position of regulating and controlling steam valve; often strong pulsatile impact can be attended by the fuel supply line of servo valve; electrohydraulic steam turbine controlling system runs in this case, the fuel lead or connector position that cause Proportional valve is leaked.In the prior art, usually all adopt and more renew spare part, or improve the passive measure of fuel lead voltage withstand class, long-time running can be leaked again, and unit is forced to load down or shuts down process, and cost is high, safety reliability is poor, can not tackle the problem at its root.In addition, when running into now this type of fault at the scene, do not have good test mode, basic employing carrys out failure judgement point according to the experience of operator and experience that such fault occurred in the past, judges inaccurate, and wastes time and energy.
Summary of the invention
The invention provides a kind of method of On line inspection process, adopt the On line inspection localization of faults, carry out in time adjusting and the means such as maintenance, solve in prior art and check and judge the technical problem that inaccurate and processing cost is high.
The present invention is that the check processing method solving the problems of the technologies described above this electrohydraulic steam turbine controlling system pulsatile impact designed comprises the following steps:
A. receive and detect pulsatile impact instruction, reduce steam-turbine unit power, turn down the servo valve in all modulating valve groups, until pulsatile impact disappears;
B. after closing main stop valve in a wherein modulating valve group and servo valve, the main stop valve be closed in modulating valve group is kept to close, and the servo valve be closed described in reopening in modulating valve group, the aperture being closed the servo valve reopened in modulating valve group described in making increases gradually, until the servo valve of pulsatile impact in this modulating valve group reappears;
C. receiving and eliminate pulsatile impact instruction, there is the described dead area compensation parameter being closed the proportional valve amplifier of the servo valve reopened in modulating valve group of pulsatile impact in adjustment, until pulsatile impact disappears.
Preferably, described step B comprises: when the described aperture being closed the servo valve reopened in modulating valve group increases to identical with the servo valve aperture of other modulating valve groups, pulsatile impact occurs on this servo valve.
Preferably, described step B comprises: when there is not pulsatile impact yet when the described aperture being closed the servo valve reopened in modulating valve group increases to identical with the servo valve aperture of other modulating valve groups, then continue through the aperture improving and be closed the servo valve reopened in modulating valve group described in the increase of steam turbine set power, until pulsatile impact occurs on this servo valve.
Preferably, described step B comprises: when there is not pulsatile impact yet when the described aperture being closed the servo valve reopened in modulating valve group increases to identical with the servo valve aperture of other modulating valve groups, continue through and improve the aperture that steam turbine set power increases described servo valve, until when there is not pulsatile impact when being closed the maximum opening of the servo valve reopened in modulating valve group described in increasing to yet on this servo valve, after then being reopened by the described main stop valve be closed in modulating valve group, be back to described steps A.
Preferably, comprise after described step C: input imperative instruction, the described servo valve reopened in modulating valve group that has been closed that pulsatile impact occurs is made to carry out fast trip test and step response test, and the data of the fast trip test recorded after adjustment dead area compensation parameter and step response test, and judge whether the adjustment of dead area compensation parameter in described step C meets the requirements according to it.
Preferably, describedly judge whether the adjustment of dead area compensation parameter in described step C meets the requirements and comprise: in described step response test, under the step instruction of 5%, the described oil engine valve position being closed the servo valve reopened in modulating valve group is without obvious overshoot, then in described step C, the adjustment of dead area compensation parameter meets the requirements.
Preferably, describedly judge whether the adjustment of dead area compensation parameter in described step C meets the requirements and comprise: in described fast trip test, describedly be closed the servo valve that reopens in modulating valve group being less than or equal in 0.2 second and close, then in described step C, the adjustment of dead area compensation parameter meets the requirements.
Preferably, the described dead area compensation parameter being closed the proportional valve amplifier of the servo valve reopened in modulating valve group of the generation of adjustment described in described step C pulsatile impact is specially:
Comprise after described step B, before described step C: the dead area compensation parameter that the described proportional valve amplifier being closed the servo valve reopened in modulating valve group measuring generation pulsatile impact is preset in systems in which;
The described dead area compensation parameter being closed the proportional valve amplifier of the servo valve reopened in modulating valve group that pulsatile impact occurs in adjustment described in described step C is specially: from the dead area compensation parameter preset, adjust dead area compensation parameter from high to low gradually, until the pulsatile impact of this servo valve disappears.
Preferably, the described dead area compensation parameter being closed the proportional valve amplifier of the servo valve reopened in modulating valve group that pulsatile impact occurs in adjustment described in described step C is specially: adjust dead area compensation parameter gradually from low to high, until when pulsatile impact appears in this servo valve, then adjust back a predefined value by this position.
Preferably, also comprise after described step C: open the described main stop valve be closed in modulating valve group eliminating pulsatile impact.
The dead area compensation parameter of the proportional valve amplifier of the servo valve of pulsatile impact is there is in the check processing method of electrohydraulic steam turbine controlling system pulsatile impact of the present invention by adjustment, and then eliminate the pulsatile impact produced in the Proportional valve oil circuit of servo valve, the check processing method simple practical of electrohydraulic steam turbine controlling system pulsatile impact of the present invention, accuracy rate is high, cost is low, the source of trouble can be eliminated completely, cost-saving, effectively improve the safety reliability of unit.
Accompanying drawing explanation
Fig. 1 is the structural representation of an embodiment of electrohydraulic steam turbine controlling system one modulating valve group of the present invention;
Fig. 2 is the schematic flow sheet of check processing method one embodiment of electrohydraulic steam turbine controlling system pulsatile impact of the present invention.
Embodiment
Specific embodiments of the invention are described in detail below in conjunction with accompanying drawing.
As shown in Figure 1, Fig. 1 is the structural representation of an embodiment of electrohydraulic steam turbine controlling system one modulating valve group of the present invention; In the present invention, electrohydraulic steam turbine controlling system comprises many group modulating valve groups (being preferably four groups), wherein each modulating valve group comprises a main stop valve 10 and a servo valve 20, and the aperture of each servo valve 20 regulates by oil engine valve position, simultaneously, the oil circuit of the aperture passing ratio valve 30 of oil engine valve position controls, and the instruction that each Proportional valve 30 receives will be amplified via an amplifier 40.At present, what electrohydraulic steam turbine controlling system generation pulsatile impact adopted usually is all go for problem in the control system of Proportional valve 30 oil circuit, deal with problems also substantially concentrate on Proportional valve 30 oil circuit control system in.But electrohydraulic steam turbine controlling system generation pulsatile impact is a system problem, it is not only the problem that oil circuit controls, find according to investigation, its basic reason is the problem of automatically controlled part, and the present invention starts with from adjustment dead area compensation parameter aspect, solves long-standing the problems referred to above.
As shown in Figure 2, Fig. 2 is the schematic flow sheet of check processing method one embodiment of electrohydraulic steam turbine controlling system pulsatile impact of the present invention.The check processing method of the present embodiment electrohydraulic steam turbine controlling system pulsatile impact comprises the following steps:
S100. receive and detect pulsatile impact instruction, reduce steam-turbine unit power, turn down the servo valve 20 in all modulating valve groups, until pulsatile impact disappears; Now only to the action that the servo valve 20 in all modulating valve groups turns down, and the main stop valve 10 in all modulating valve groups keeps reset condition, does not affect its work;
S200. after closing main stop valve 10 in a wherein modulating valve group and servo valve 20, the main stop valve 10 be closed described in maintenance in modulating valve group is closed, and the servo valve 20 be closed described in reopening in modulating valve group, the aperture being closed the servo valve 20 reopened in modulating valve group described in making increases gradually, until pulsatile impact reappears on the servo valve 20 of this modulating valve group;
S300. receiving and eliminate pulsatile impact instruction, there is the described dead area compensation parameter being closed the amplifier 40 of the Proportional valve 30 of the servo valve 20 reopened in modulating valve group of pulsatile impact in adjustment, until pulsatile impact disappears.Above dead area compensation parameter refers to: in the present invention, Proportional valve 30 is electro-hydraulic proportional valve, there is larger dead band, in dead band, (described in the present embodiment, control signal refers to operation voltage to the control signal no matter inputted, also namely for drive Proportional valve 30 oil circuit action after, it is made to produce the voltage of the driving force of driving oil engine valve position folding) be how many, the logical oily flow of this Proportional valve 30 is 0.Therefore, when dead band is excessive, easily control lag is produced; And dead area compensation parameter can make when the control signal inputted changes in small size scope, add a control signal value being equal to dead area compensation parameter, thus export a large control signal to Proportional valve 30, overcome dead band, by above-mentioned, in the present invention, on the present operation voltage of compensating body of dead area compensation parameter.
The pulsatile impact of electrohydraulic steam turbine controlling system usually occurs in the oil circuit of Proportional valve 30, and response valve position during folding normally due to oil engine valve position is excessive, and Proportional valve 30 oil circuit oil extraction and oil-feed time moment switch continuous running that is frequent and that switch and cause; Therefore, when there is pulsatile impact, after first will determining that pulsatile impact occurs in the oil circuit of the Proportional valve 30 of which servo valve 20 correspondence, then it is processed, and the concrete deterministic process of its occurrence positions is as follows:
First assign and detect pulsatile impact instruction, after electrohydraulic steam turbine controlling system receives and detects pulsatile impact instruction, reduce steam-turbine unit power, because electrohydraulic steam turbine controlling system comprises many group modulating valve groups, and when steam-turbine unit power reduction, the steam flow passed through in main stop valve 10 in all modulating valve groups and servo valve 20 is all thereupon corresponding to diminish, and now due under steam-turbine unit power is in the state that electrohydraulic steam turbine controlling system controls automatically, main stop valve 10 in all modulating valve groups and the aperture of servo valve 20 also can along with the corresponding reductions of the reduction of power, the response valve position also corresponding reduction along with the minimizing of steam flow during folding simultaneously due to oil engine valve position, therefore when steam-turbine unit power reduction is to certain numerical value, pulsatile impact can disappear thereupon, in one embodiment, when steam-turbine unit power is down to 1036MW by electrohydraulic steam turbine controlling system, pulsatile impact disappears.
After pulsatile impact disappears, one group of modulating valve group in selected electrohydraulic steam turbine controlling system using its servo valve 20 as detected object, first by after the main stop valve 10 of this modulating valve group and servo valve 20, the main stop valve 10 in this modulating valve group is kept to close, and the servo valve 20 reopened in described modulating valve group, all receive same instruction due to all servo valves 20 in electrohydraulic steam turbine controlling system and keep same aperture, therefore, when other modulating valve groups maintain under the steam-turbine unit power of above-mentioned reduction, the aperture reopening the servo valve 20 in described modulating valve group also can increase under automatic control state thereupon gradually, due to the steam in each the modulating valve group in electrohydraulic steam turbine controlling system be all first enter main stop valve 10 after, enter again in servo valve 20 and regulate, therefore in said process, the action of closing the main stop valve 10 in this modulating valve group is the normal operations in order to make this modulating valve group can not affect whole electrohydraulic steam turbine controlling system in follow-up adjustment process, and above-mentioned servo valve 20 in this modulating valve group is closed after the action of once more the opening embodiment that is embodiment shown in Fig. 2, but in the present invention, be not limited to upper type, such as, also can after only closing the main stop valve 10 in this modulating valve group, first servo valve 20 in this modulating valve group is turned down, its aperture under automatic control state is made to increase gradually again, eliminate the action of being closed by this servo valve 20.By above-mentioned, because the aperture of the servo valve 20 of selected modulating valve group increases gradually under automatic control state, therefore response valve position during its oil engine valve position folding also increases thereupon, if pulsatile impact reappears on the servo valve 20 of described modulating valve group, then representing this modulating valve group is that a group in the modulating valve group of pulsatile impact occurs, and can carry out follow-up set-up procedure in this modulating valve group.
When occurring according to above step determination pulsatile impact on one group or the servo valve 20 organizing modulating valve group more, need its pulsatile impact phenomenon of elimination, in order to avoid have an impact to the operation of electrohydraulic steam turbine controlling system, the oil circuit of Proportional valve 30 is such as made to leak; Therefore, first assign and eliminate pulsatile impact instruction, and after the instruction of electrohydraulic steam turbine controlling system reception elimination pulsatile impact, there is the dead area compensation parameter of Proportional valve 30 amplifier 40 of the servo valve 20 of the described modulating valve group of pulsatile impact in adjustment, and then the operation voltage of resize ratio valve 30, until pulsatile impact completes adjustment process after disappearing.As preferably, also comprise after described step S300: the main stop valve 10 opening the described modulating valve group eliminating pulsatile impact.Also namely, when after the adjustment completing this modulating valve group, need this modulating valve group resumption of service, therefore need again the main stop valve 10 of this modulating valve group to be opened, make steam again pass through and start working.
In the present invention, electrohydraulic steam turbine controlling system generation pulsatile impact not necessarily just occurs in one group of modulating valve group, also may organize modulating valve group more and similar fault all occurs, therefore each step of the present invention can be carried out repeatedly, check after determining which group modulating valve group pulsatile impact occurs in one by one, adjust respectively, eliminate pulsatile impact.
Further, in one embodiment, the dead area compensation parameter that Proportional valve 30 amplifier 40 of the servo valve 20 of the described modulating valve group of pulsatile impact occurs in adjustment described in described step S300 is specially: start from zero, adjust dead area compensation parameter gradually from low to high, until when there is pulsatile impact in described servo valve 20, a predefined value is adjusted back again by this position, the predefined value of the dead area compensation parameter of this readjustment is preferably: compensate the operation voltage of described servo valve 20 to increasing 0.1-0.2 volt, also be, due to the reduction of dead area compensation parameter, for the compensation also corresponding minimizing of operation voltage, needing to export Proportional valve oil circuit to makes its operation voltage producing the unlatching of driving oil engine valve position also can lie prostrate by corresponding increase 0.1-0.2.Also, namely, in the present embodiment, the adjustment for dead area compensation parameter is ascending to be adjusted.In above adjustment process, only need operation voltage and the dead area compensation parameter sum of described Proportional valve 30, the aperture making oil engine valve position reach expection can be reached after overcoming dead band, therefore, when increasing dead area compensation parameter, the operation voltage of described Proportional valve 30 reduces thereupon; And increasing in the process of dead area compensation parameter, the sensitivity of Proportional valve 30 increases, and Proportional valve no longer has excessive valve position response actually, and therefore pulsatile impact can disappear thereupon, and adjustment process completes thereupon; But, when dead area compensation parameter is too small, although can not pulsatile impact be produced, but the reaction time of Proportional valve 30 is long, cause the delayed of instruction, therefore dead area compensation parameter can not be too small, needs to adjust dead area compensation parameter to a suitable position.As preferably, in above-mentioned adjustment process, when reducing about 0.35 volt when the operation voltage of described servo valve 20 is adjusted to that comparatively dead area compensation parameter is zero the most at last (also after dead area compensation parameter adjustment, when compensate for about 0.35 volt of operation voltage), the pulsatile impact of described servo valve 20 disappears for best.Also namely, in the present embodiment, the preferred value of dead area compensation parameter is that dead area compensation parametric compensation operation voltage makes it reduce 0.35 volt.
Further, in another embodiment, after described step S200, comprise before described step S300: the dead area compensation parameter that Proportional valve 30 amplifier 40 measuring the servo valve 20 of the described modulating valve group that pulsatile impact occurs is preset in systems in which; Before carrying out adjustment dead area compensation parameter, default deadzone parameter value has been there is in system, the dead area compensation parameter preset for this measures, reference can be carried out before adjustment dead area compensation parameter, contrast after adjustment, determine the reason of pulsatile impact further and determine that whether the system eliminated after pulsatile impact is normal.The dead area compensation parameter that Proportional valve 30 amplifier 40 of the servo valve 20 of the described modulating valve group of pulsatile impact occurs in adjustment described in described step S300 is specially: from the dead area compensation parameter preset, adjust dead area compensation parameter from high to low gradually, until the pulsatile impact of described servo valve 20 disappears.Also namely, the basic reason owing to producing pulsatile impact is that the excessive caused reaction of dead area compensation parameter is too sensitive, reaction velocity is too fast, the valve position of Proportional valve 30 response excessive (also can produce overshoot in the case); Therefore, start to reduce dead area compensation parameter gradually from the dead area compensation parameter preset, can overcome the above problems, eliminate pulsatile impact.But when dead area compensation parameter is too small, although can not produce pulsatile impact, the reaction time of Proportional valve 30 is long, causes the delayed of instruction, therefore need to adjust dead area compensation parameter to a suitable position.
Further, the step S100 shown in Fig. 2 comprises following three kinds of situations:
First, when the elected aperture had made to order as the servo valve 20 in the described modulating valve group of detected object increases to identical with other modulating valve group servo valve 20 apertures, pulsatile impact occurs on described servo valve 20, also be, when under automatic control state, aperture is increased to servo valve 20 aperture being less than or equal to other modulating valve groups to described servo valve 20 gradually, pulsatile impact just occurs as on the servo valve 20 of detected object described, now, determine that the servo valve 20 of this modulating valve group is one of reason producing pulsatile impact.
Second, when there is not pulsatile impact yet when the aperture of the servo valve 20 in described modulating valve group increases to identical with servo valve 20 aperture of other modulating valve groups, response valve position when then representing the folding of oil engine valve position not yet may reach response valve position size when producing pulsatile impact, now can continue through and improve the aperture that steam turbine set power increases described servo valve 20, until pulsatile impact occurs on described servo valve 20.
3rd, when there is not pulsatile impact yet when the aperture of the servo valve 20 in described modulating valve group increases to identical with servo valve 20 aperture of other modulating valve groups, continue through and improve the aperture that steam turbine set power increases described servo valve 20, until when increasing to the maximum opening of described servo valve 20, when there is not pulsatile impact yet in described servo valve 20, then representing this group modulating valve group is not the modulating valve group producing pulsatile impact, now need to detect another group modulating valve group, so after the main stop valve 10 of described modulating valve group is reopened, be back to described step S100, re-start detection and the process of a new round.The maximum opening of described servo valve 20 refers to: when all modulating valve groups runs well, described servo valve 20 when steam-turbine unit full power, the maximum opening now at servo valve 20.
Further, comprise after step S300 shown in Fig. 2: input imperative instruction, the described servo valve 20 that pulsatile impact occurs is made to carry out fast trip test and step response test, and the data of the fast trip test recorded after adjustment dead area compensation parameter and step response test, and judge whether the adjustment of dead area compensation parameter in described step S300 meets the requirements according to it.Above-mentioned fast trip test and the demand of step response test in order to check the adjustment of dead area compensation parameter whether to meet system.
In the present invention, as preferably, in described determining step S300 dead area compensation parameter adjustment in step response test whether meet the requirements and comprise: in described step response test, under the step instruction of 5%, the oil engine valve position of described servo valve 20 is without obvious overshoot, then in described step S300, the adjustment of dead area compensation parameter meets the requirements.Such as, if the aperture of oil engine valve position is current is 40%, then the aperture of ordering to adjust oil engine valve position for ± 5% time, also namely represent current assign be 5% step instruction, in this adjustment process, namely the oil engine valve position of described servo valve 20 satisfies the demands without obvious overshoot; Certainly, in the present invention, described step instruction is not limited to be 5%, also can be other numerical value, such as 6% etc., after the value of a setting step instruction, the numerical value being less than described step instruction all obviously satisfies the demands, therefore, in the described step response test of the present embodiment, the preferable range of this step instruction is actual is 0-5%.
Simultaneously, in the present invention, as preferably, describedly judge whether the adjustment of dead area compensation parameter in described step S300 meets the requirements and comprise: in described fast trip test, described servo valve 20 be less than or equal in 0.2 second close, namely also the oil engine valve position of described servo valve 20 is closed being less than or equal in 0.2 second, then in described step S300, the adjustment of dead area compensation parameter meets the requirements.Certainly, in the present invention, the above restriction for quick closing's time also can regulate as required.
As preferably, can also comprise after described step S200, before described step S300: input imperative instruction, make the described servo valve 20 that pulsatile impact occurs carry out fast trip test and step response test, and record the primary data of fast trip test and step response test.Fast trip test and step response test was carried out before carrying out adjustment dead area compensation parameter, can contrast for the test parameters recorded after adjustment dead area compensation parameter, determine the reason of pulsatile impact further and determine that whether the system eliminated after pulsatile impact is normal.
There is the dead area compensation parameter of the proportional valve amplifier of the servo valve 20 of pulsatile impact in the check processing method of electrohydraulic steam turbine controlling system pulsatile impact of the present invention, and then eliminates the pulsatile impact produced in the oil circuit of the Proportional valve 30 of servo valve 20 by adjustment.Judge by rule of thumb relative in prior art, obviously its accuracy rate is lower, and requires higher for the technical skills of attendant, must have rich experience and just can accomplish.The present invention utilizes that equipment is operating to be judged, not only save time, accuracy rate is also very high, and, so high requirement is not had for attendant yet, as long as undertaken by step of the present invention, accurately can check source of being out of order.And the present invention is simple and practical, accuracy rate is high, cost is low, can eliminate the source of trouble completely, cost-saving, effectively improve the safety reliability of unit.
Above content is in conjunction with concrete preferred implementation further description made for the present invention, can not assert that specific embodiment of the invention is confined to these explanations.For general technical staff of the technical field of the invention, without departing from the inventive concept of the premise, some simple deduction or replace can also be made, all should be considered as belonging to protection scope of the present invention.
Claims (10)
1. a check processing method for electrohydraulic steam turbine controlling system pulsatile impact, is characterized in that, this check processing method comprises the following steps:
A. receive and detect pulsatile impact instruction, reduce steam-turbine unit power, turn down the servo valve in all modulating valve groups, until pulsatile impact disappears;
B. after closing main stop valve in a wherein modulating valve group and servo valve, the main stop valve in this modulating valve group is kept to close, and the servo valve be closed described in reopening in modulating valve group, the aperture being closed the servo valve reopened in modulating valve group described in making increases gradually, until pulsatile impact reappears on the servo valve of this modulating valve group;
C. receiving and eliminate pulsatile impact instruction, there is the described dead area compensation parameter being closed the proportional valve amplifier of the servo valve reopened in modulating valve group of pulsatile impact in adjustment, until pulsatile impact disappears.
2. according to the check processing method of electrohydraulic steam turbine controlling system pulsatile impact described in claim 1, it is characterized in that, described step B comprises: when described be closed reopen in modulating valve group the aperture of servo valve increase to identical with the servo valve aperture of other modulating valve groups time, pulsatile impact occurs on this servo valve.
3. the check processing method of electrohydraulic steam turbine controlling system pulsatile impact according to claim 1, it is characterized in that, described step B comprises: when there is not pulsatile impact yet when the described aperture being closed the servo valve reopened in modulating valve group increases to identical with the servo valve aperture of other modulating valve groups, then continue through and improve the aperture that steam turbine set power increases described servo valve, until pulsatile impact occurs on this servo valve.
4. according to the check processing method of electrohydraulic steam turbine controlling system pulsatile impact described in claim 1, it is characterized in that, described step B comprises: when there is not pulsatile impact yet when the described aperture being closed the servo valve reopened in modulating valve group increases to identical with the servo valve aperture of other modulating valve groups, continue through and improve the aperture that steam turbine set power increases this servo valve, until when there is not pulsatile impact when being closed the maximum opening of the servo valve reopened in modulating valve group described in increasing to yet on this servo valve, after then the described main stop valve be closed in modulating valve group being reopened, be back to described steps A.
5. the check processing method of electrohydraulic steam turbine controlling system pulsatile impact according to claim 4, it is characterized in that, comprise after described step C: input imperative instruction, the described servo valve reopened in modulating valve group that has been closed that pulsatile impact occurs is made to carry out fast trip test and step response test, and the data of the fast trip test recorded after adjustment dead area compensation parameter and step response test, and judge whether the adjustment of dead area compensation parameter in described step C meets the requirements according to it.
6. the check processing method of electrohydraulic steam turbine controlling system pulsatile impact according to claim 5, it is characterized in that, describedly judge whether the adjustment of dead area compensation parameter in described step C meets the requirements and comprise: in described step response test, under the step instruction of 5%, the described oil engine valve position being closed the servo valve reopened in modulating valve group is without obvious overshoot, then in described step C, the adjustment of dead area compensation parameter meets the requirements.
7. the check processing method of electrohydraulic steam turbine controlling system pulsatile impact according to claim 5, it is characterized in that, describedly judge whether the adjustment of dead area compensation parameter in described step C meets the requirements and comprise: in described fast trip test, describedly be closed the servo valve that reopens in modulating valve group being less than or equal in 0.2 second and close, then in described step C, the adjustment of dead area compensation parameter meets the requirements.
8. the check processing method of electrohydraulic steam turbine controlling system pulsatile impact according to any one of claim 1 to 7, it is characterized in that, comprise after described step B, before described step C: the dead area compensation parameter that the described proportional valve amplifier being closed the servo valve reopened in modulating valve group measuring generation pulsatile impact is preset in systems in which;
The described dead area compensation parameter being closed the proportional valve amplifier of the servo valve reopened in modulating valve group that pulsatile impact occurs in adjustment described in described step C is specially: from the dead area compensation parameter preset, adjust dead area compensation parameter from high to low gradually, until the pulsatile impact of this servo valve disappears.
9. the check processing method of electrohydraulic steam turbine controlling system pulsatile impact according to claim 8, it is characterized in that, the described dead area compensation parameter being closed the proportional valve amplifier of the servo valve reopened in modulating valve group that pulsatile impact occurs in adjustment described in described step C is specially: adjust dead area compensation parameter gradually from low to high, until when pulsatile impact appears in this servo valve described, then adjust back a predefined value by this position.
10. the check processing method of electrohydraulic steam turbine controlling system pulsatile impact according to claim 1, is characterized in that, also comprise after described step C: open the described main stop valve be closed in modulating valve group eliminating pulsatile impact.
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| CN106555620B (en) * | 2015-09-30 | 2018-09-25 | 大亚湾核电运营管理有限责任公司 | A kind of Steam Turhine Adjustment control valve device and method |
| CN110307985B (en) * | 2019-06-17 | 2021-07-06 | 中广核核电运营有限公司 | Overtime fault diagnosis method and device for high-pressure steam valve test of nuclear turbine |
| CN114087413B (en) * | 2021-11-26 | 2023-12-22 | 中广核工程有限公司 | Proportional valve adjusting method, device, equipment and medium |
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