CN103628933B - Realize the controlling method of Miniature steamer unit emergency protective system function - Google Patents
Realize the controlling method of Miniature steamer unit emergency protective system function Download PDFInfo
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- CN103628933B CN103628933B CN201310639620.5A CN201310639620A CN103628933B CN 103628933 B CN103628933 B CN 103628933B CN 201310639620 A CN201310639620 A CN 201310639620A CN 103628933 B CN103628933 B CN 103628933B
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Abstract
The invention discloses a kind of controlling method realizing Miniature steamer unit emergency protective system function, its forecast scheme configuration mainly comprises: the power supply of formation steam turbine automation control system, CPU, communication all take redundancy backup to configure; ETS blockette to be integrated in steam turbine automation control system and independent of main program isolated operation; Steam turbine operation trip signal is delivered to after being gathered by I/O module in two cover CPU by ETS blockette calculation process; logic control judged result host CPU computing obtained exports DO fastener through instruction and is delivered to corresponding shutdown solenoid valve, realizes the emergency protection function of steam turbine.Controlling method of the present invention utilizes the hardware hot backup redundancy of steam turbine automation control system self to realize Miniature steamer unit emergency protective system function; must extra additional control system; reduce cabinet quantity; Signal transmissions between minimizing system; reduce cross-line between cabinet; reduce dropout probability, signal is more concentrated.
Description
Technical field
The present invention relates to turbine emergency protection technical field, particularly relate to a kind of method realizing emergency protective system of steam turbine function based on Miniature steamer unit automation control system.
Background technique
Emergency protective system of steam turbine (ETS, EMERGENCYTRIPSYSTEM) be the protective system of operating conditions parameter for monitoring turbine, steam turbine operation duty parameter comprises steam turbine hypervelocity, steam turbine vibrates, Generator Vibration, axial displacement, difference that cylinder is swollen, Thrust-vectoring nozzle, radial Wa Wendu, condenser vacuum, lubricating oil pressure, G-T protective action, electric-regulating device is shut down, manual emergency overspeed governor, MFT action etc., when steam turbine operation duty parameter exceedes safety limit, emergency protective system of steam turbine ETS will close whole steam-turbine air intake valve automatically, emergency shutdown, to ensure that Turbine Safety runs.
The emergency protective system of steam turbine of prior art, all adopts and designs a system separately outward independent of steam turbine control system, be integrated into an emergency protective system of steam turbine control cabinet.Two cover power supplys, CPU, communication, signal input output fastener, relay etc. are provided with in the control cabinet of emergency protective system of steam turbine; warning from boiler or steam turbine scene, shafting monitoring TSI, digital electro-hydraulic control system DEH, Boiler Furnace Safeguard Supervisory System FSSS and miscellaneous equipment and stopping signal is received by signals collecting DI fastener; and the signal input of switching value can only be accepted; and carry out integrated logic judgement process according to fling-cut switch signal; export DO fastener by instruction, output to and shut down solenoid valve and integrated alarm alarm window.The collection of signal and the output of instruction all adopt relay to isolate.The emergency protective system of steam turbine of prior art, be the soft redundancy of being overlapped control system by software simulating two, the turbine emergency protection of this mode has the following disadvantages:
1, overlapped the soft redundancy backup of control system by software simulating two, cannot realize real hot standby no-harass switch function by reliable hardware device, switch speed is slow, and steam turbine operation safety class is not high; And the cost that can realize the hot backup redundancy ETS system switched fast is too expensive, be not suitable for Miniature steamer unit;
2, comprehensive intelligent can not be done in conjunction with the analog amount trend of monitoring point to judge;
3, independently do Logic judgment separately, see Fig. 2, arbitrary system judges to shut down output, and namely directly export scene to, malfunction probability is high;
4, design an emergency protective system system separately outward independent of steam turbine control system, combine separately an emergency protective system of steam turbine control cabinet, steam turbine control system cost is high.
Summary of the invention
For the deficiency that the controlling method of prior art exists, object of the present invention aims to provide a kind of low, that precision is high, reliable and stable control new method realizing Miniature steamer unit emergency protective system function of controlling cost.
The controlling method realizing Miniature steamer unit emergency protective system function provided by the invention, its forecast scheme configuration mainly comprises: the power supply of formation steam turbine automation control system, CPU, communication all take redundancy backup to configure; ETS blockette to be integrated in steam turbine automation control system and independent of main program isolated operation; Steam turbine operation trip signal is delivered to after being gathered by I/O module in two cover CPU by ETS blockette calculation process; logic control judged result host CPU computing obtained exports DO fastener through instruction and is delivered to corresponding shutdown solenoid valve, realizes the emergency protection function of steam turbine.
In technique scheme of the present invention, the two cover CPU that described automation control system is arranged, preferably master slave relation each other, namely when one of them CPU is host CPU, another CPU is from CPU, and only makes the operation result of host CPU be transported to instruction output DO fastener, conveying armed state is in from the operation result of CPU, take this patten's design, can relay control circuit be reduced, prevent malfunction.
In technique scheme of the present invention; logic control preferably judges in conjunction with Output rusults again after the analog signals trend integrated treatment of corresponding data monitoring point by described host CPU, to lose cause the situation of mistakenly stop machine or erroneous judgement to occur to reduce a certain signal because of fault.
In technique scheme of the present invention, the DC electrical source of described shutdown solenoid valve is preferably designed as independent current source, not public with other DC electrical source of system.
In technique scheme of the present invention, ETS Real-time Monitoring Data scope generally comprises: steam turbine hypervelocity, steam turbine vibration, Generator Vibration, axial displacement, cylinder is swollen difference, Thrust-vectoring nozzle, radial Wa Wendu, condenser vacuum, lubricating oil pressure, G-T protective action, electric-regulating device are shut down, manual emergency overspeed governor and MFT action etc.
The controlling method realizing Miniature steamer unit emergency protective system function provided by the invention; on the automation control system basis be equipped with based on steam turbine itself; by ETS subroutine of programming separately; ETS blockette is integrated in steam turbine automation control system; independent of the isolated operation of automation control system main program; realize the function of Miniature steamer unit emergency protective system, do not increase separately ETS control system hardware.
The present invention is based on the long-term production practices of inventor, completes the profound understanding of steam turbine automation control system and the summary of production practices.Steam turbine automation control system, self all adopts the hardware hot backup redundancy standby system such as power supply, CPU, communication usually, and see accompanying drawing 4, which is very ripe in the use of industrial control field, and reliable and stable; And general main program accounts for cpu load rate lower than 40%, storage occupies capacity lower than 50%, and the day-to-day operation of small hydropower station controls mostly to be data monitoring, the signal major part that need control only uses when steam turbine starts and shut down, the loop regulated is needed to only have 1 ~ 3 in day-to-day operation process, need the workload of calculating in real time less, do not conflict mutually with ETS system real-time inspection and control; The acanning cycle Dou Shi Microsecond grade unit (μ s) of steam turbine automation control system, meets the requirement of speed of response completely.Therefore being worked out by emergency protective system ETS is that a blockette is integrated in steam turbine automation control system, and making it independent of the isolated operation of automation control system main program, is feasible to realize the function of Miniature steamer unit emergency protective system.Inventor just completes the present invention based on above-mentioned cognition.
Controlling method of the present invention, takes automation control system to receive the switching value digital signal tripping relevant to steam turbine, comprehensive fling-cut switch position judgment, in conjunction with the analog amount operation trend of corresponding measuring point, exported again by ETS controll block Logic judgment, malfunction probability can be reduced, improve reliability.Existing ETS technology only accepts on-off model, cannot realize this function.
Controlling method of the present invention, the two cover CPU operation independents that automation control system is arranged, master slave relation each other, only have the operation result of host CPU just can be transported to instruction and export DO fastener, be in conveying armed state from the operation result of CPU, ETS Operation system setting compared to prior art has two cover input output fasteners, and two cover instructions export DO fastener and all can act on relay, decrease relay control circuit, effectively can prevent malfunction.The DC electrical source that ETS Logic judgment exports solenoid valve to is designed to independent current source, not public with other DC electrical source of system, prevent signal disturbing or tripping, improve the reliability of control loop.
The controlling method realizing Miniature steamer unit emergency protective system function provided by the invention, compared with the controlling method of prior art, sums up and has following very outstanding advantage and useful technique effect:
1, automatic system adopts the hot backup redundancy systems such as power supply, CPU, communication, and the redundancy that system is supported is the redundancy of system itself, supported by system hardware/software itself, need not design extra application software and be achieved.Each active station can standby each other, and possess the function of active redundancy, safety class is high.
2, decrease cross-line between Signal transmissions between system, cabinet, reduce dropout probability, signal is more concentrated, and some signals, must actual hardwire directly from DCS internal transmission, more reliably.
3, switching value digital signal does integrated logic judgement in conjunction with analog amount operation trend, and system is more intelligent, reduces malfunction probability, improves control accuracy.
4, cost-saving, control system that must be not extra, reduces cabinet quantity.
Accompanying drawing explanation
Fig. 1 is ETS control logic block diagram representation.
Fig. 2 is conventional ETS independence control flow schematic diagram.
Fig. 3 is the soft Redundant Control schematic flow sheet of conventional ETS.
The steam turbine automation control system sketch that Fig. 4 depends on for the present invention.
Embodiment
Below by embodiment, the present invention is further described specifically.Be necessary to herein means out, the following examples are just for setting forth working principle of the present invention and practical application thereof better, so that the present invention is used in the various facilities in its field by the technician in other field, and improve according to the imagination of various special-purpose.Although the present invention discloses its first-selected embodiment by word; but by read these technology explanatory notes can understand wherein can optimization and modifiability; and improve not departing from scope and spirit of the present invention, but such improvement still should belong to the protection domain of the claims in the present invention.
The controlling method realizing Miniature steamer unit emergency protective system function of the present embodiment, all takes hot backup redundancy backup configuration by the hardware such as power supply, CPU, communication forming steam turbine automation control system; Emergency protective system ETS blockette to be integrated in steam turbine automation control system and independent of main program isolated operation; Steam turbine operation trip signal is delivered to after being gathered by I/O module in two cover CPU by ETS blockette calculation process.Two cover CPU master slave relation each other; when one of them is host CPU, another is from CPU, and only has the operation result of host CPU to be delivered to corresponding shutdown solenoid valve through instruction output DO fastener; realize the emergency protection function of steam turbine, and be in conveying armed state from the operation result of CPU.The steam turbine automation control system that the controlling method of the present embodiment depends on as shown in Figure 4, two cover power module, CPU module, communication modules set by steam turbine automation control system, by optical fiber technology real-time transmission data, can switching undisturbed extremely control loop for subsequent use when arbitrary device fails such as CPU, power supply, communication of major loop.In the controlling method of the present embodiment, the signal that steam turbine operation tripping operation is relevant, signal as relevant in Steam Turbine Vibration, displacement, swollen difference, Wa Wen, Generator Vibration etc., take its switching value digital signal, comprehensive fling-cut switch position judgment, analog amount operation trend in conjunction with corresponding measuring point judges, as QBAD (badprocessvalue)=1, acquired results lost efficacy; As QBAD (badprocessvalue)=0, exported again by ETS controll block Logic judgment, greatly reduce malfunction probability, improve accuracy.Condenser vacuum and far-end lubrication pressure get two votings because having three, are no longer so limited.
According to the power beating the equipment such as lock solenoid valve or OPC solenoid valve, select the DC24V independent current source of suitable size, the working power that chaser is correlated with and other instrument powers independently, improve safety coefficient.
Claims (6)
1. realize a controlling method for Miniature steamer unit emergency protective system function, it is characterized in that: the power supply of formation steam turbine automation control system, CPU, communication all take redundancy backup to configure; ETS blockette to be integrated in steam turbine automation control system and independent of main program isolated operation; Steam turbine operation trip signal is delivered to after being gathered by I/O module in two cover CPU by ETS blockette calculation process; logic control judged result host CPU computing obtained exports DO fastener through instruction and is delivered to corresponding shutdown solenoid valve, realizes the emergency protection function of steam turbine.
2. realize the controlling method of Miniature steamer unit emergency protective system function as claimed in claim 1; it is characterized in that; the two cover CPU master slave relation each other that automation control system is arranged; the operation result of host CPU is transported to instruction and exports DO fastener; conveying armed state is in from the operation result of CPU; to reduce relay control circuit, prevent malfunction.
3. realize the controlling method of Miniature steamer unit emergency protective system function as claimed in claim 2; it is characterized in that; logic control judges in conjunction with Output rusults again after the analog signals trend integrated treatment of corresponding data monitoring point by host CPU, to lose cause the situation of mistakenly stop machine and erroneous judgement to occur to reduce a certain signal because of fault.
4. the controlling method realizing Miniature steamer unit emergency protective system function as described in claim 1 or 2 or 3, is characterized in that, the DC electrical source of described shutdown solenoid valve is not public with other DC electrical source of system independent current source.
5. the controlling method realizing Miniature steamer unit emergency protective system function as described in claim 1 or 2 or 3; it is characterized in that, ETS Real-time Monitoring Data scope comprises: steam turbine hypervelocity, steam turbine vibration, Generator Vibration, axial displacement, cylinder is swollen difference, Thrust-vectoring nozzle, radial Wa Wendu, condenser vacuum, lubricating oil pressure, G-T protective action, electric-regulating device are shut down, manual emergency overspeed governor and MFT action.
6. realize the controlling method of Miniature steamer unit emergency protective system function as claimed in claim 4; it is characterized in that, ETS Real-time Monitoring Data scope comprises: steam turbine hypervelocity, steam turbine vibration, Generator Vibration, axial displacement, cylinder is swollen difference, Thrust-vectoring nozzle, radial Wa Wendu, condenser vacuum, lubricating oil pressure, G-T protective action, electric-regulating device are shut down, manual emergency overspeed governor and MFT action.
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| CN104121044B (en) * | 2014-07-24 | 2015-12-30 | 江苏永钢集团有限公司 | The method of controlling security of generator jumped by a kind of turbine emergency protector connection |
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| CN110231797B (en) * | 2019-04-30 | 2021-05-28 | 华电电力科学研究院有限公司 | Online monitoring method for ETS (extraction-transformation-Loading) trip circuit |
| CN110080837B (en) * | 2019-06-06 | 2023-12-08 | 东方电气自动控制工程有限公司 | Control module adopting three-out-of-two logic voting |
| CN111810300B (en) * | 2020-07-03 | 2021-08-06 | 东方电气自动控制工程有限公司 | Gas turbine protection device |
| CN112282868B (en) * | 2020-10-29 | 2022-06-21 | 上海电力大学 | Protection system based on emergency interruption of steam turbine |
| CN114034497A (en) * | 2021-11-04 | 2022-02-11 | 上海自动化仪表有限公司 | Steam turbine health state data acquisition device |
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