CN102063064A - Turbine operation control system - Google Patents
Turbine operation control system Download PDFInfo
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- CN102063064A CN102063064A CN2009101986892A CN200910198689A CN102063064A CN 102063064 A CN102063064 A CN 102063064A CN 2009101986892 A CN2009101986892 A CN 2009101986892A CN 200910198689 A CN200910198689 A CN 200910198689A CN 102063064 A CN102063064 A CN 102063064A
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Abstract
The invention discloses a turbine operation control system. The turbine operation control system comprises a digital electric hydraulic (DEH) control system, wherein three redundant speed detection protection (SDP) modules are arranged in the DEH control system; the three SDP modules output over speed protection (OPC) signals to an OPC electromagnetic valve in a control field through a two-in-three relay and is controlled by a data processing unit (DPU) in the DEH control system through a corresponding station control card; an over speed limit module is arranged in each SDP module; and a secondary frequency modulation module is arranged in the DPU. The turbine operation control system can effectively solve the problems of a conventional turbine control system when a machine set is under special operation conditions of isolated network or local area network.
Description
Technical field:
The present invention relates to a kind of computer control system, particularly a kind of turbine control system that is used for power plant.
Background technology:
Continuous development along with computer system, turbine control system is replaced the mode of initial pure hydraulic control system substantially by electrohydraulic control system DEH, because the dirigibility and the advance of deh control system, frequently the mode of controlling for merit is also little by little changing, the diversity factor of pure hydraulic system is to adjust by the Machinery Ministry cover to realize, and existing deh control system can be realized the setting of diversity factor easily by function, to satisfy the demand of different operating modes.
As shown in Figure 1, deh control system is mainly used in the control steam turbine and starts and on-load, realize every adjusting test function, and occur at unit that autostable 3000rpm is incorporated into the power networks so that continue under the situation of removal of load, deh control system is by receiving the rotating speed from the scene, and signals such as power are through realizing control to steam turbine rotating speed and power by each valve of control steam turbine after the logic control.
The frequency modulation of hydraulic system is also to be that the ratio regulative mode is regulated by primary frequency modulation, regulate when rotating speed rises when removal of load appears in system that porthole is proportional to be turned down, rotating speed during final stablizing is not generally at the rotating speed same period, deh control system follows the principle of hydraulic system aspect primary frequency modulation, be that ratio is regulated equally, can not eliminate the surplus poor of rotating speed.Regulate because primary frequency modulation is pure ratio,, can cause that usually unit can not satisfy the desired frequency range of consumer under this operating mode, even may cause and exceed the cycle claimed range and the jumping machine so be difficult to satisfy the requirement of precision.
Unit owing to many reasons, may run into the phenomenon of lonely net or LAN (Local Area Network) operation in actual motion, have plenty of because the imperfection of electric loop, reasons such as generator outlet bus, or this power plant is in the end of electrical network, or in particular cases electric network fault or the like appears.When unit occurring under the operating mode of lonely net or LAN (Local Area Network) operation, be difficult to stabilized (steady-state) speed 3000rpm,, particularly when paralysing, electrical network will face " the black startup " because of the requirement that can't satisfy the consumer frequency causes by forced-stopping machine.
Present deh control system is when unit is in big network operation and when normal removal of load occurring, when being generator outlet oil switch parallel off, behind the DEH automatic reception generator parallel off signal, change rotating speed control over to, the autostable rotating speed is 3000rpm, be incorporated into the power networks again after the question generator fault recovery.As shown in Figure 2, in the generator outlet electric loop, when generating machine oil BR switch does not disconnect and when exporting to the switch BR1 of electrical network bus or BR2 and disconnecting, unit is actual still in load carrying, it is moment in fault, unexpected variation takes place and exceeds the speed limit in the load of unit band, and the still set grid-connection operation that DEH receives.
Summary of the invention:
The present invention is directed to existing turbine control system existing problem when unit is in this special operating condition of lonely net or LAN (Local Area Network), the technical issues that need to address are as follows: 1) avoid the action in advance of overspeed signal as far as possible; 2) guarantee the safety of steam turbine, exceeding the speed limit, DEH need export the continuation hypervelocity that the overspeed protection actuating signal suppresses steam turbine behind the certain value; 3) frequency range that needs to satisfy consumer stable operation in the process of steam turbine stabilization of speed requires 49.5～50.5Hz, need stablize user's frequency by the regulative mode of indifference.
In order to solve the problems of the technologies described above, the present invention adopts following technical scheme:
The steam turbine operation control system, it comprises a deh control system, testing the speed and overspeed protection module SDP of three redundancies is set in the described deh control system, described three are tested the speed and overspeed protection module SDP selects two relays output OPC signal to controlling on-the-spot OPC solenoid valve by three, and are controlled by DPU in the deh control system by corresponding station control card; Described every test the speed and overspeed protection module SDP in the hypervelocity limiting module is set, described hypervelocity limiting module limits the hypervelocity of steam turbine simultaneously by the restriction of overspeed protection action definite value, generator and steam turbine load unbalance protection dual mode; Be provided with the frequency modulation frequency modulation module among the described DPU, the mode that described frequency modulation frequency modulation module is regulated by the PI indifference realizes that unit satisfies the requirement that the electricity consumption frequency is 50Hz, 3000rpm when entering the LAN (Local Area Network) operation.
Overspeed protection action definite value ways to restrain in the described hypervelocity limiting module is for after arriving overspeed protection action definite value when the steam turbine rotating speed, output overspeed protection action node limits.
Described overspeed protection action definite value is 103% of a steam turbine rated speed.
Generator and steam turbine load unbalance protection mode are exported OPC signal controlling scene OPC solenoid valve for when the amount of unbalance of the power of represent generator and steam turbine load＞60% in the described hypervelocity limiting module.
Be provided with the frequency modulation frequency modulation module among the described DPU and realize frequency modulation frequency modulation as follows:
(1) judges that unit enters little net state, judge according to the change in rotational speed situation whether unit enters little network operation state automatically,, judge that unit is in little net or LAN (Local Area Network) is moved when rotating speed during greater than 3030rpm;
(2) fast cutback is regulated, and when steam turbine rotating speed rising causing OPC action or PLU action, starts the RUNBACK signal and reduces the power given value of deh control system to satisfy the demand of real power.When the fluctuation of speed upper limit reduces to the OPC working value, carry out frequency modulation frequency modulation;
(3) frequency adjustment (rotational speed regulation) is set at 3000rpm with the set-point of rotating speed, and promptly frequency is 50Hz, will set rotating speed and actual speed and compare and enter the PI indifference and regulate, and finally satisfying actual speed is 3000rpm;
(4) unit withdraws from frequency modulation frequency modulation after being incorporated into the power networks again, after the steam turbine rotating speed satisfied the requirement same period, unit can be incorporated into the power networks again, judged that the steam turbine rotating speed has withdrawed from the dead zone range of frequency modulation frequency modulation, behind delay confirmation, withdraw from the frequency modulation frequency modulation operation automatically, enter the state that is incorporated into the power networks normally.
The output order that the output of frequency modulation frequency modulation is regulated by the PI indifference in the described step (3) original power given instruction that is added to obtains.
The present invention who obtains according to technique scheme be on the basis of original deh control system to DEH special control card spare make amendment, increase frequency modulation frequency modulation control and protection module, increase the frequency modulation frequency modulation module on the original basis simultaneously, make the present invention have following characteristics:
1) the present invention's easy realization simple in structure, the user need not to change equipment set as long as carrying out certain change on the basis of existing equipment can realize the present invention, economizes on resources greatly.
2) the present invention realizes overspeed protection by hardware, and the response time is very fast, and the hardware logic partial response time plays very important effect less than 10ms to the overspeed protection of turbodynamo.
When 3) the present invention carries out the secondary frequency adjustment, adopt PI indifference regulative mode, its quality of frequency that offers consumer is higher.
These characteristics makes the present invention can solve existing turbine control system existing problem when unit is in this special operating condition of lonely net or LAN (Local Area Network) effectively.
Description of drawings:
Further specify the present invention below in conjunction with the drawings and specific embodiments.
Fig. 1 is existing turbine control system connection layout.
Fig. 2 is a generator outlet electric loop synoptic diagram.
Fig. 3 is the hardware block diagram of deh control system.
Fig. 4 is the structural representation of SDP card.
Fig. 5 is a power unbalance protection principle schematic.
Fig. 6 is DEH steering logic figure among the present invention.
Fig. 7 carries out the synoptic diagram of overspeed protection and frequency modulation frequency modulation for the present invention.
Fig. 8 is generator outlet electric loop synoptic diagram during for practical application of the present invention.
Fig. 9 is an on-the-spot DEH system little network operation test trend map.
Embodiment:
For technological means, creation characteristic that the present invention is realized, reach purpose and effect is easy to understand, below in conjunction with concrete diagram, further set forth the present invention.
The present invention is directed to existing turbine control system when unit is in lonely net or LAN (Local Area Network) and moves this special operating condition; existing a series of problem; on the basis of original deh control system; by adopting the solution that software configuration increases the frequency modulation frequency modulation function among hardware modifications and the DPU, realize satisfying simultaneously the requirement of overspeed protection and stabilized (steady-state) speed.Hardware is provided with the hypervelocity of avoiding unit by the definite value protection, and software satisfies the requirement of consumer to frequency by PI indifference regulative mode.Unit is occurred under the situation of full load rejection, localised load or band station service can both stabilized (steady-state) speed, form stable line frequency.
Based on above-mentioned principle, of the present invention being implemented as follows:
In order to realize that control reaches overspeed protection to the steam turbine rotating speed; as shown in Figure 3; deh control system provided by the invention adopts testing the speed and overspeed protection module SDP of triplex level redundancy; be placed on respectively three the card cages in, three steam turbine tach signals of collection in worksite also enter respectively three test the speed and overspeed protection module SDP in.These three SDP select two relays output OPC signal to on-the-spot OPC solenoid valve by three, realize its control is reached the purpose that suppresses hypervelocity.DPU controls this three SDP by corresponding station control card BC-NET in the deh control system simultaneously.
SDP is intelligent rotating speed card; as shown in Figure 4; design has CPU and a FPGA in its hardware fastener, and all need the protection logic that realizes fast and the software of frequency modulation frequency modulation, and all burning is in FPGA, and CPU realizes SDP card and the data communication of standing between the control card BC-NET with FPGA.
Because steam turbine is atwirl plant equipment, the control of rotating speed needs the control module of fast cycle.In order on SDP, to realize this function, the present invention every test the speed and overspeed protection module SDP in be provided with the hypervelocity limiting module.This hypervelocity limiting module is controlled by dual mode simultaneously to the control of steam turbine rotating speed: the one, export the mode that the overspeed protection action command limits by SDP after the rotating speed arrival overspeed protection action definite value; the 2nd, predict hypervelocity in advance by generator and the unbalanced mode of steam turbine load and export OPC (OVER SPEED PROTECTION) signal, remove to control on-the-spot OPC solenoid valve and suppress hypervelocity effectively.
When adopting first kind of mode to control the steam turbine rotating speed in the hypervelocity limiting module, its overspeed protection action definite value is 103%, is 103% of steam turbine rated speed 3000rpm, is 3090rpm.
When adopting the second way to control, when the amount of unbalance of the power of represent generator and steam turbine load＞60%, output OPC signal controlling scene OPC solenoid valve.
As shown in Figure 5, in generator off-the-line moment, because electric load pop-off and steam turbine load lag behind and disappear, so the imbalance of moment can appear in generator load and steam turbine load, power (MW) is represented generator load, and middle pressure steam pressure (IEP) is represented steam turbine load.When both difference greater than 60% the time, can predict that steam turbine can exceed the speed limit, so DEH sends the rotating speed that the OPC signal suppresses steam turbine before prior to the reality hypervelocity.
The present invention is in deh control system, and the mode of the primary frequency modulation of the pure ratio of ring and outer shroud proportional integral realizes the little network operation operating mode of steam turbine in adopting.DEH enters primary frequency modulation automatically behind the set grid-connection, and participates in calculating according to the diversity factor of setting.Wherein the primary frequency modulation parameter of deh control system is: diversity factor δ=5% (adjustable); Untuned dead band+2rpm (adjustable); Tuning range+150rpm (5%).
Because primary frequency modulation is to have difference to regulate, and, realizes 50Hz, be the requirement of 3000rpm so for consumer, can not satisfy the electricity consumption frequency well because the load of unit when entering the LAN (Local Area Network) operation is uncertain often.For this problem, increased the frequency modulation frequency modulation functional module among the DPU of the present invention in deh control system, then in the DEH steering logic, increase the logical gate of frequency modulation frequency modulation, the frequency modulation frequency modulation logic that increases among the present invention is to increase the speed closed loop function in original DEH is incorporated into the power networks steering logic, as shown in Figure 6.
The function that increases the frequency modulation frequency modulation module in the deh control system of the present invention is implemented as follows:
1, DEH judges that automatically unit enters little net state
Owing to reasons such as distances, power plant is difficult to offer the node state of DEH line side combined floodgate switch.When normal set grid-connection moved, the rotating speed of unit was generally more stable, just can occur the significant change of rotating speed when having only fault., this module judges according to the change in rotational speed situation automatically that when rotating speed during greater than 3030rpm, deh control system thinks that unit is in little net or LAN (Local Area Network) operation so realizing DEH.
2, fast cutback is regulated
When steam turbine rotating speed rising causing OPC action or PLU action, the power load of actual steam turbine load greater than reality is described, at this moment DEH starts the RUNBACK signal automatically and reduces the power given value of DEH to satisfy the demand of real power.RUNBACK reality also plays the effect of load set-point initial adjustment, has also avoided the action frequency of OPC simultaneously.When the fluctuation of speed upper limit reduced to the OPC working value, the output valve of DEH frequency modulation frequency modulation began to regulate by the pitch instruction.
3, rotating speed (frequency) is regulated
The DEH system judges that automatically the set-point that unit enters behind the frequency modulation frequency modulation simultaneously rotating speed is set at 3000rpm (50Hz), sets rotating speed and compares and enter the adjusting of PI indifference with actual speed, and finally satisfying actual speed is 3000rpm.Owing to also have integration to regulate in the regulating action that indifference is regulated except ratio is regulated, when instructing and feedback when deviation occurring, it is surplus poor to eliminate by autocatalytic reset action, thereby better unit is regulated like this.
The output of frequency modulation frequency modulation simultaneously, promptly the output order regulated of rotating speed PI indifference is added to, and output comes the regulating and controlling valve after original power given instruction.
4, DEH withdrawed from frequency modulation frequency modulation automatically after unit was incorporated into the power networks again
After rotating speed satisfied the requirement same period, unit can be incorporated into the power networks again.At this moment stabilization of speed, DEH judges that automatically rotating speed has withdrawed from the dead zone range of frequency modulation frequency modulation, withdraws from the frequency modulation frequency modulation operation behind delay confirmation automatically, enters the state that is incorporated into the power networks normally.In this step when unit is actual be incorporated into the power networks after, tach signal is actual for net signal frequently, because unit reality is incorporated into the power networks again, so deh control system will withdraw from frequency modulation frequency modulation and transfer power control to.
Obtain operational process of the present invention as shown in Figure 7 according to technique scheme, Zhong Jian vertical line has been depicted the scope of primary frequency modulation and frequency modulation frequency modulation in the figure, horizontal ordinate is represented power, ordinate is represented rotating speed, oblique line at first quartile is that diversity factor is 5 merit frequency curve, change when requiring when primary frequency modulation can not satisfy mains frequency, adjust, the process of Here it is frequency modulation frequency modulation by the corresponding oblique line of translation.The set-point of frequency modulation frequency modulation can be by manual setting, but actual set is in service, and is relatively more difficult by artificial setting, thus when design, judge automatically by DEH, and produce set-point automatically.
In the process of operation, if when the power of steam turbine differs greatly with little online load during big network operation, the little network operation of generation removal of load band may make generating unit speed rise rapidly.As shown in Figure 7, (overspeed protection before the set grid-connection generally all is 103% when power amount of unbalance＞60% or generating unit speed surpass 105%, but after the set grid-connection, for avoid the action of little network operation operating mode overspeed protection as far as possible, so overspeed protection is set at 105%), OPC protects control action, closes pitch rapidly, steam turbine power is descended, so that power and load are as early as possible near balance rapidly; After rotating speed descends, again by above-mentioned once, the frequency modulation frequency modulation function finishes the frequency adjustment.In boosting velocity procedure, the working value of OPC is 103% still, remains unchanged.
In a single day control system detects little network operation, then excises the CCS remote control, drops into the frequency modulation frequency modulation loop, to reduce DEH power definite value, finally is stabilized in specified cycle.
Control system provided by the invention when actual motion for the electric switch that is incorporated into the power networks: because electric wiring complexity, the method for operation are various, the state that is difficult to provide big net of unit band or little network operation mode.In this case, DEH adopt to judge the way of current cycle, generally when rotating speed+102% when above, think and be with little network operation, the input frequency modulation frequency modulation.
Signal for little network operation: adopt three road governing stage pressure as steam turbine power in the control of power-balance, the generator outlet power signal is as generator power.It is that steam turbine truly is incorporated into the power networks that the signal that is incorporated into the power networks of DEH system adopts generator outlet BR switch, so need relevant line switching state is all introduced DEH.
The present invention is when practical application, as long as original control system is carried out certain modification can realize function corresponding of the present invention, concrete modification is divided into hardware and software two parts:
Hardware modifications
1) the SDP card that will have a frequency modulation frequency modulation protection replaces original SDP card;
2) will represent the power of generator load and steam turbine load and middle pressure steam pressure signal to introduce in the SDP terminal strip;
3) the overspeed protection action definite value of increase frequency modulation frequency modulation is 103%.
Software modification
1) in configuration, increases the function that the steam turbine hypervelocity starts fast cutback;
2) increase frequency modulation frequency modulation PI indifference regulatory function and with original logic realization seamless combination;
The automatic paralleling function that need be incorporated into the power networks again when 4) increasing little network operation is promptly regulated the coupling that satisfies generating unit speed and electrical network rotating speed by PID, realization simultaneous interconnecting function;
5) corresponding HMI picture modification promptly enters/glimmers on picture after withdrawing from frequency modulation frequency modulation as DEH.
The turbine control system that obtains by above-mentioned modification is when carrying out l-G simulation test, the DEH system is connected with emulator, in emulator, pack into steam turbine and generator realistic model and simulate the electric loop figure of power plant, the operating mode of analog electrical air circuit fault, monitor the action situation of frequency modulation frequency modulation and the situation of ascending to heaven of steam turbine actual speed.After the steam turbine operation was netted in the scope that is stabilized in requirement frequently, DEH withdrawed from frequency modulation frequency modulation automatically, is connected to the grid.
When the turbine control system that obtains by above-mentioned modification was actually used in the south vapour 50MW unit control of certain power plant, the generator outlet electric loop of this power plant as shown in Figure 8.
During practical application of the present invention, electric fault occurs when set grid-connection moves, wiretap 1 disconnects and wiretap 2 is with little network operation operating mode when closed.Load on power that steam turbine is sent out and the 110KV is unequal generally speaking, so the little net cycle of 110KV must fluctuate.
Because by increasing the function of frequency modulation frequency modulation on the above-mentioned basis that is modified in original deh control system, this moment, deh control system was at first loaded according to the static characteristic increase and decrease steam turbine of primary frequency modulation, to stablize little net cycle, simultaneously deh control system judges whether to be in according to the state of wiretap 1 and is with little network operation, be with little network operation in case detect, then excise the CCS remote control, drop into the frequency modulation frequency modulation loop, to reduce DEH power definite value, finally be stabilized in specified cycle.
In the above-mentioned practical operation, when southern vapour 50MW unit got rid of to 0.72MW from 6MW, DEH dropped into frequency modulation frequency modulation automatically and regulates, and the moment rotating speed of removal of load soars and be upgraded to 3141rpm most, and minimum speed is 2999rpm, the cycle that vibrates half, and be 24S stabilization time.By removal of load curve shown in Figure 9 as can be known, it has reached extraordinary control effect.When the present invention moves, all can similarly be moved the unit test findings in the large unit unit, be with a wide range of applications.
More than show and described ultimate principle of the present invention and principal character and advantage of the present invention.The technician of the industry should understand; the present invention is not subjected to the restriction of above-mentioned case study on implementation; that describes in above-mentioned case study on implementation and the instructions just illustrates principle of the present invention; without departing from the spirit and scope of the present invention; the present invention also has various changes and modifications, and these changes and improvements all fall in the claimed scope of the invention.The claimed scope of the present invention is defined by appending claims and equivalent thereof.
Claims (6)
1. steam turbine operation control system, it comprises a deh control system, it is characterized in that, testing the speed and overspeed protection module SDP of three redundancies is set in the described deh control system, described three are tested the speed and overspeed protection module SDP selects two relays output OPC signal to controlling on-the-spot OPC solenoid valve by three, and are controlled by DPU in the deh control system by corresponding station control card; Described every test the speed and overspeed protection module SDP in the hypervelocity limiting module is set, described hypervelocity limiting module limits the hypervelocity of steam turbine simultaneously by the restriction of overspeed protection action definite value, generator and steam turbine load unbalance protection dual mode; Be provided with the frequency modulation frequency modulation module among the described DPU, the mode that described frequency modulation frequency modulation module is regulated by the PI indifference realizes that unit satisfies the requirement that the electricity consumption frequency is 50Hz 3000rpm when entering the LAN (Local Area Network) operation.
2. steam turbine operation control system according to claim 1; it is characterized in that; overspeed protection action definite value ways to restrain in the described hypervelocity limiting module is for after arriving overspeed protection action definite value when the steam turbine rotating speed, output overspeed protection action node limits.
3. steam turbine operation control system according to claim 2 is characterized in that, described overspeed protection action definite value is 103% of a steam turbine rated speed.
4. steam turbine operation control system according to claim 1; it is characterized in that; generator and steam turbine load unbalance protection mode are exported OPC signal controlling scene OPC solenoid valve for when the amount of unbalance of the power of represent generator and steam turbine load＞60% in the described hypervelocity limiting module.
5. steam turbine operation control system according to claim 1 is characterized in that, is provided with the frequency modulation frequency modulation module among the described DPU and realizes frequency modulation frequency modulation as follows:
(1) judges that unit enters little net state, judge according to the change in rotational speed situation automatically,, judge that unit is in little net or LAN (Local Area Network) operation when rotating speed during greater than 3030rpm;
(2) fast cutback is regulated, when steam turbine rotating speed rising causing OPC action or PLU action, the power given value that startup RUNBACK signal reduces deh control system when the fluctuation of speed upper limit reduces to the OPC working value, is carried out frequency modulation frequency modulation to satisfy the demand of real power;
(3) frequency adjustment, i.e. rotational speed regulation is set at 3000rpm with the set-point of rotating speed, and promptly frequency is 50Hz, will set rotating speed and actual speed and compare and enter the PI indifference and regulate, and finally satisfying actual speed is 3000rpm;
(4) unit withdraws from frequency modulation frequency modulation after being incorporated into the power networks again, after the steam turbine rotating speed satisfied the requirement same period, unit can be incorporated into the power networks again, judged that the steam turbine rotating speed is withdrawing from the dead zone range of frequency modulation frequency modulation, behind delay confirmation, withdraw from the frequency modulation frequency modulation operation automatically, enter the state that is incorporated into the power networks normally.
6. steam turbine operation control system according to claim 5 is characterized in that, the output order that the output of frequency modulation frequency modulation is regulated by the PI indifference in the described step (3) original power given instruction that is added to obtains.
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| CN2009101986892A CN102063064A (en) | 2009-11-12 | 2009-11-12 | Turbine operation control system |
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Cited By (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103953613A (en) * | 2014-05-07 | 2014-07-30 | 山东中实易通集团有限公司 | Spot diagnosis method for emergently interdicting low safety oil pressure |
| CN104009474A (en) * | 2014-06-17 | 2014-08-27 | 贵州电力试验研究院 | Primary frequency modulation setting method used under condition of isolated power grid |
| CN104500151A (en) * | 2014-12-08 | 2015-04-08 | 中广核工程有限公司 | Load control method and system for adjustment of steam turbine of nuclear power station |
| CN106451526A (en) * | 2016-07-08 | 2017-02-22 | 国网河南省电力公司电力科学研究院 | OPC protection setting method for turbine during isolated network operation |
| CN108879791A (en) * | 2017-05-12 | 2018-11-23 | 中国石油化工股份有限公司 | A kind of isolated network vapour electric equilibrium method |
| CN109188895A (en) * | 2018-09-13 | 2019-01-11 | 杭州和利时自动化有限公司 | A kind of servo-control system based on Redundancy Design |
| CN109449924A (en) * | 2018-10-24 | 2019-03-08 | 南瑞集团有限公司 | The method of discrimination and device of a kind of hydroelectric power plant's governor to large and small net change working |
| CN112832876A (en) * | 2020-12-31 | 2021-05-25 | 威立雅（哈尔滨）热电有限公司 | Method for carrying out isolated network starting operation of steam turbine generator through automatic control system |
| WO2021098332A1 (en) * | 2019-11-18 | 2021-05-27 | 南京科远智慧科技集团股份有限公司 | Automatic inspection method applied to triply-redundant overspeed protection device |
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- 2009-11-12 CN CN2009101986892A patent/CN102063064A/en active Pending
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103953613A (en) * | 2014-05-07 | 2014-07-30 | 山东中实易通集团有限公司 | Spot diagnosis method for emergently interdicting low safety oil pressure |
| CN104009474A (en) * | 2014-06-17 | 2014-08-27 | 贵州电力试验研究院 | Primary frequency modulation setting method used under condition of isolated power grid |
| CN104009474B (en) * | 2014-06-17 | 2021-11-02 | 贵州电网有限责任公司 | Primary frequency modulation setting method used in isolated grid mode of power grid |
| CN104500151A (en) * | 2014-12-08 | 2015-04-08 | 中广核工程有限公司 | Load control method and system for adjustment of steam turbine of nuclear power station |
| CN104500151B (en) * | 2014-12-08 | 2016-05-11 | 中广核工程有限公司 | Duty control method and system during steam turbine for nuclear power station regulates |
| CN106451526B (en) * | 2016-07-08 | 2021-05-28 | 国网河南省电力公司电力科学研究院 | OPC protection setting method for steam turbine in isolated network operation |
| CN106451526A (en) * | 2016-07-08 | 2017-02-22 | 国网河南省电力公司电力科学研究院 | OPC protection setting method for turbine during isolated network operation |
| CN108879791A (en) * | 2017-05-12 | 2018-11-23 | 中国石油化工股份有限公司 | A kind of isolated network vapour electric equilibrium method |
| CN109188895A (en) * | 2018-09-13 | 2019-01-11 | 杭州和利时自动化有限公司 | A kind of servo-control system based on Redundancy Design |
| CN109449924A (en) * | 2018-10-24 | 2019-03-08 | 南瑞集团有限公司 | The method of discrimination and device of a kind of hydroelectric power plant's governor to large and small net change working |
| CN109449924B (en) * | 2018-10-24 | 2021-11-05 | 南瑞集团有限公司 | Method and device for discriminating conversion of hydraulic power plant speed regulator to large and small network working conditions |
| WO2021098332A1 (en) * | 2019-11-18 | 2021-05-27 | 南京科远智慧科技集团股份有限公司 | Automatic inspection method applied to triply-redundant overspeed protection device |
| CN112832876A (en) * | 2020-12-31 | 2021-05-25 | 威立雅（哈尔滨）热电有限公司 | Method for carrying out isolated network starting operation of steam turbine generator through automatic control system |
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Application publication date: 20110518 |