CN2674107Y - Steam turbine digital electrohydraulic control system having medium pressure cylinder starting function - Google Patents
Steam turbine digital electrohydraulic control system having medium pressure cylinder starting function Download PDFInfo
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- CN2674107Y CN2674107Y CN 200420019788 CN200420019788U CN2674107Y CN 2674107 Y CN2674107 Y CN 2674107Y CN 200420019788 CN200420019788 CN 200420019788 CN 200420019788 U CN200420019788 U CN 200420019788U CN 2674107 Y CN2674107 Y CN 2674107Y
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Abstract
The utility model discloses a steam turbine digital electro-hydraulic control system which is provided with medium pressure cylinder starting function and is characterized in that the system comprises two parts which are the control module and the hydraulic system execution module. The control module further comprises an interface module which receives operation instruction, a first input module which gathers site signals, a procedure control processing module which connects with the output end of the interface module and the first input module and simultaneously sends out other control signals according to the valve opening command signal received when the medium pressure cylinder, a valve control module which connects with the output end of the procedure control processing module and sends out control signals after comparing the valve opening command signal and actual feedback signal of valve position and a hydraulic system execution module which connects with the output end of the valve control modular and simultaneously accepts overprotection signals to realize the protection function according to the control signal controlling the valve opening at the instructed position.
Description
Technical field
The utility model relates to the digital electrohydraulic control system that uses on a kind of steam turbine, especially the steam turbine control system of intermediate pressure cylinder start-up function.
Background technique
Digital electro-hydraulic control system (DEH) is applied to various Large Steam Turbine Sets at present at large, is the start and stop of control steam turbine set, moves necessary key equipment.General steam turbine adopts high-pressure cylinder to start or high pressure combined launch mode; the DEH system that is equipped with can satisfy the control and protection requirement that these steam turbine start; and all perfect inadequately to the DEH that steam turbine is joined that adopts intermediate pressure cylinder start-up, can not satisfy its special control requirement.
Summary of the invention
Adopt high-pressure cylinder to start or mode high, the intermediate pressure cylinder combined launch at present most of steam turbine.Characteristics of the present utility model are the different phase in the operation of unit intermediate pressure cylinder start-up, coordinate control each steam valve of steam turbine and auxiliary valve according to certain condition, and cooperate with bypath system, successfully realize intermediate pressure cylinder start-up, and solved the key issue of cutting cylinder, traditional method of indicating the pronunciation of a Chinese character cylinder.
The utility model at be steam turbine DEH control system with intermediate pressure cylinder start-up function; its objective is the special control requirement during solving Steam Turbine Through IP Admission starts; mainly be the switching and the anti-switching of high-pressure cylinder/intermediate pressure cylinder; the control requirement that Steam Turbine Through IP Admission starts and move each stage is satisfied in the control of the protection of high-pressure cylinder and intermediate pressure cylinder start-up auxiliary valve etc.Guarantee safety, the reliable operation of steam turbine.
To achieve these goals, the utility model adopts following technological scheme, and a kind of digital electro-hydraulic control system with intermediate pressure cylinder start-up function is characterized in that, described system comprises control module and hydraulic system Executive Module two-part composition, and described control module further comprises:
Interface Module is accepted operational order;
First load module, the collection site signal;
The process control puocessing module is connected the output terminal of the Interface Module and first load module, requires to obtain the valve opening command signal according to intermediate pressure cylinder start-up, exports other control signals simultaneously;
The valve control module is connected the output terminal of process control puocessing module, and relatively valve opening command signal and actual valve position feedback signal are exported control signal;
The hydraulic system Executive Module is connected the output terminal of described valve control module, makes valve opening be controlled at the location of instruction according to control signal, has accepted the overprotection signal simultaneously and has realized protective function.
Description of drawings
Below, with reference to accompanying drawing, for those skilled in the art that, to the detailed description of the present utility model, above-mentioned and other purposes of the present utility model, feature and advantage will be apparent.
Fig. 1 is the structured flowchart of control system of the present utility model.
Embodiment
See also Fig. 1, control system of the present utility model comprises control module 10 and hydraulic system Executive Module 20 two-part composition.Control module 10 is made up of Interface Module 11, process control puocessing module 12, first load module 13, valve control module 14, overspeed protection module 15 etc.
Interface Module 11 is accepted operational order and is shown, operational order is admitted to process control puocessing module 12, send into the on-site signal that also has of process control puocessing module 12 simultaneously, gather by first load module 13, mainly comprise analog signalses such as rotating speed, power, main vapour pressure, reheat pressure power, governing stage pressure, valve position feedback signal, temperature, and switching value signal such as be incorporated into the power networks.These signals carry out logical process and computing after delivering to process control puocessing module 12, obtain the valve opening command signal, export to valve control module 14, and other signals are by output module 16 outputs.
In addition, overspeed protection module 15 is gathered the on-site signal of second load module 17 and the output signal of process control puocessing module 12, obtains the overspeed protection signal; also send into valve control module 14; realize the turbine over function by hardware, speed of response is fast, the reliability height.Overspeed signal is delivered to hydraulic system Executive Module 20 simultaneously, realizes protective function.
Regulate porthole and control for one of 14 pairs of steam turbine of valve control module.Valve control module 14 is valve opening command signal and actual valve position feedback signal relatively, outputs a control signal to the servovalve of hydraulic system Executive Module 20, makes valve opening be controlled at the position of command request.Control system satisfies the requirement of the various operating conditionss of steam turbine by each steam valve of control steam turbine.
Hydraulic system Executive Module 20 comprises oil supplying device, oil engine, servovalve, safe oil system and oil pipe line composition.Its effect is the control signal of receiving control system, moves by oil engine driving steam turbine steam valve.In case of emergency, safe oil system guarantees each valve oil engine energy safety, quick closedown.Controller is finished the control computing and is instructed to high pressure, the dispensing of Middle pressure valve management department respectively by the intermediate pressure cylinder controller, realizes the requirement of intermediate pressure cylinder start-up with the control steam turbine by electro-control converter control high pressure, Middle pressure valve.
Control system of the present utility model has accurate control turbine speed, the general utility functions of load, and especially control has its particularity at intermediate pressure cylinder:
The logical process of process control puocessing module 12 of the present utility model relates to tangent cylinder and traditional method of indicating the pronunciation of a Chinese character cylinder two aspects.Need satisfy during the tangent cylinder: the scope that the vapor pressure of high-pressure admission valve reaches specified value, obtain main steam temperature by the governing stage metal temperature makes itself and metal temperature coupling, calculate the flow that enters high-pressure cylinder is greater than the conditions such as flow that enter high-pressure cylinder greater than the minimum cooling flow of high-pressure cylinder, high by-pass flow amount.And the high-pressure admission valve is opened automatically, and high pressure bypass valve and high-pressure admission valve are coordinated, and turn down up to complete shut-down gradually.With vapor portion or all switch to high-pressure cylinder, keep power constant substantially.The vacuum valve of the logical condenser of high-pressure cylinder cuts out automatically.
Steam is traditional method of indicating the pronunciation of a Chinese character cylinder from the process that the high-pressure cylinder admission switches to complete intermediate pressure cylinder admission.When unit load dropped to certain value, the high-pressure cylinder flow satisfied traditional method of indicating the pronunciation of a Chinese character cylinder condition, and system sends to bypass and cuts cylinder signal, and the high-pressure admission valve cuts out gradually, and by-pass valve is opened gradually simultaneously, and steam enters steam turbine from intermediate pressure cylinder, finishes traditional method of indicating the pronunciation of a Chinese character cylinder process.
Claims (2)
1, a kind of digital electro-hydraulic control system with intermediate pressure cylinder start-up function is characterized in that, described system comprises control module and hydraulic system Executive Module two-part composition, and described control module further comprises:
Interface Module is accepted operational order;
First load module, the collection site signal;
The process control puocessing module is connected the output terminal of the Interface Module and first load module, requires to obtain the valve opening command signal according to intermediate pressure cylinder start-up, exports other control signals simultaneously;
The valve control module is connected the output terminal of process control puocessing module, and relatively valve opening command signal and actual valve position feedback signal are exported control signal;
The hydraulic system Executive Module is connected the output terminal of described valve control module, makes valve opening be controlled at the location of instruction according to control signal, has accepted the overspeed protection signal simultaneously and has realized protective function.
2, control system according to claim 1 is characterized in that, described system further comprises:
Second load module, the collection site signal;
The overspeed protection module is connected the output terminal of described second load module, and its output terminal is connected with the input end of valve control module, obtains the overspeed protection signal according to on-site signal, and this signal is sent into the valve control module.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 200420019788 CN2674107Y (en) | 2004-01-21 | 2004-01-21 | Steam turbine digital electrohydraulic control system having medium pressure cylinder starting function |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 200420019788 CN2674107Y (en) | 2004-01-21 | 2004-01-21 | Steam turbine digital electrohydraulic control system having medium pressure cylinder starting function |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN2674107Y true CN2674107Y (en) | 2005-01-26 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 200420019788 Expired - Lifetime CN2674107Y (en) | 2004-01-21 | 2004-01-21 | Steam turbine digital electrohydraulic control system having medium pressure cylinder starting function |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN2674107Y (en) |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN100474201C (en) * | 2007-01-30 | 2009-04-01 | 北京和利时系统工程有限公司 | Method and device for restricting overspeed of a speed adjustment system |
| CN101307699B (en) * | 2007-05-14 | 2010-05-19 | 上海电气电站设备有限公司 | Digital electrichydraulic control system for generating plant turboset |
| CN102536349A (en) * | 2010-12-17 | 2012-07-04 | 阿尔斯通技术有限公司 | Steam turbine overspeed protection method and system |
| CN104074611A (en) * | 2014-05-29 | 2014-10-01 | 广东红海湾发电有限公司 | Cylinder-switching automatic control method based on starting of intermediate pressure cylinder of steam turbine |
-
2004
- 2004-01-21 CN CN 200420019788 patent/CN2674107Y/en not_active Expired - Lifetime
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN100474201C (en) * | 2007-01-30 | 2009-04-01 | 北京和利时系统工程有限公司 | Method and device for restricting overspeed of a speed adjustment system |
| CN101307699B (en) * | 2007-05-14 | 2010-05-19 | 上海电气电站设备有限公司 | Digital electrichydraulic control system for generating plant turboset |
| CN102536349A (en) * | 2010-12-17 | 2012-07-04 | 阿尔斯通技术有限公司 | Steam turbine overspeed protection method and system |
| CN104074611A (en) * | 2014-05-29 | 2014-10-01 | 广东红海湾发电有限公司 | Cylinder-switching automatic control method based on starting of intermediate pressure cylinder of steam turbine |
| CN104074611B (en) * | 2014-05-29 | 2016-10-05 | 广东红海湾发电有限公司 | Cylinder autocontrol method is cut based on what Steam Turbine Through IP Admission started |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| ASS | Succession or assignment of patent right |
Owner name: XINHUA CONTROL ENGINEERING CO., LTD. Free format text: FORMER OWNER: SHANGHAI XINHUA CONTROL TECHNOLOGY (GROUP) CO., LTD. Effective date: 20050513 |
|
| C41 | Transfer of patent application or patent right or utility model | ||
| TR01 | Transfer of patent right |
Effective date of registration: 20050513 Address after: 200245 No. 160, Wen Jing Road, Shanghai, Minhang District Patentee after: Xinhua Control Engineering Co., Ltd. Address before: 200240 No. 160, Wen Jing Road, Minhang Economic Development Zone, Shanghai, China Patentee before: Xinhua Control Tech. (Group) Co., Ltd., Shanghai |
|
| CX01 | Expiry of patent term | ||
| CX01 | Expiry of patent term |
Expiration termination date: 20140121 Granted publication date: 20050126 |