CN202531349U - PLC (programmable logic controller)-based hydraulic generator protection device - Google Patents
PLC (programmable logic controller)-based hydraulic generator protection device Download PDFInfo
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- CN202531349U CN202531349U CN2012201049346U CN201220104934U CN202531349U CN 202531349 U CN202531349 U CN 202531349U CN 2012201049346 U CN2012201049346 U CN 2012201049346U CN 201220104934 U CN201220104934 U CN 201220104934U CN 202531349 U CN202531349 U CN 202531349U
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- plc
- controller
- hydraulic generator
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- protection device
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E10/00—Energy generation through renewable energy sources
- Y02E10/20—Hydro energy
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Abstract
The utility model discloses a PLC (programmable logic controller)-based hydraulic generator protection device, which includes a main PLC, a controller and an IO (input and output) module, wherein the IO module includes a switching value input module and a switching value output module, the main PLC is in communication connection with the controller, and the controller is connected with the switching value input module and the switching value output module respectively. The utility model has the advantages that the PLC-based hydraulic generator protection device not only achieves the hydraulic generator protection function, is provided with the data storage and processing functions as well as the process state monitoring, prediction and pre-treatment functions, but also can positively detect the operation state of the main PLC and judge the signal state, and realizes the protection function in real time in case of a failure. The PLC-based hydraulic generator protection device is safe and reliable, is practical in functions, completely replaces the traditional pure relay logic hydraulic generator protection device, performs data communication and share with other control systems of the power plant, can find the causes of an accident according to an accident signal and the variation of the relevant analog quantity signal, and realizes the failure analysis and judgment.
Description
Technical field
The utility model relates to a kind of water protector based on PLC.
Background technique
Hydroelectric power plant's water organizational security protects as hydraulic generator unit GPF (General Protection False means, when following accident takes place, will trigger the water organizational security and protect action: unit oil gear accident low oil pressure; Bearing temperature is higher than setting value; Unit is overrun; Break pin is interrupted in the shutdown process; Other halt conditions of power station regulation (for example weighing gas etc.).
Overrun for unit, following three kinds of overspeed protection functions are generally arranged: 115%nr+ main control valve tripping (main control valve hair fastener) overspeed protection; The electric overspeed protection of 140%nr; 160%nr machinery overspeed protection.
One of above-mentioned accident or multinomial accident trigger, and require to start conventional water organizational security fast and protect, and directly act on and jump the unit outlet breaker, machine unit speed regulating device closes guide vane and excitation system is jumped degaussing switch; Can also determine whether fall stop gate according to different trouble-signals, enlarge, avoid resulting in greater loss to prevent accident.
It is after the hydraulic generator unit has an accident that the water organizational security protects, the reserve means of protecting as main control loop water organizational security.It is to adopt the relay logic that conventional water organizational security protects the loop, promptly adopts relay to realize merely, and it is to utilize relay loop to realize that logic is judged, logic blocking is carried out in series connection between the protective function each other.Because the performance that the water organizational security protects depends on the relay logic loop and guarantees that the following points drawback: 1) node is unreliable, causes the protection misoperation; 2) node adhesion causes the protection akinesia; 3) and can not realize the storage of data, can not the realization accident review; 4) station service disappears or during the main protection loop fault, and this loop can not action message, can expansion accident scope, result in greater loss.
The model utility content
The utility model has overcome shortcoming of the prior art, and a kind of water protector based on PLC is provided.
The technological scheme of the utility model is: a kind of water protector based on PLC; Comprise main PLC, controller and IO module; Said IO module comprises switching input module and switching value output module; Wherein: main PLC is connected with the controller communication, and controller is connected with the switching value output module with switching input module respectively.
Said controller comprises Ethernet interface, 232 interfaces, 485 interfaces and programming port.
Said controller has double-power source.
Compared with prior art, the utility model has the advantages that: can not only accomplish water organizational security protective function, possess storage and processing capacity, and can initiatively detect the running state of main PLC, judge signal condition, real-time implementation protective function when fault takes place.It is a kind of safe and reliable that the utility model provides; The water protector that function is practical; Substitute traditional pure relay logic water organizational security fully and protect, and carry out data interchange between power plant's other control system and share, can reach the situation of change of relevant with it analog signals after having an accident through trouble-signal; Search reason, realize accident analysis and judgement.
Description of drawings
The utility model will explain through example and with reference to the mode of accompanying drawing, wherein:
Fig. 1 is the structural representation of the utility model.
Embodiment
As shown in Figure 1; A kind of water protector based on PLC comprises: main PLC, controller and IO module, and said IO module comprises switching input module and switching value output module; Main PLC is connected with the controller communication, and controller is connected with the switching value output module with switching input module respectively.Wherein:
Said controller comprises Ethernet interface 1,232 interfaces 2,485 interfaces 3, programming port 4 and double-power source 5, supports embedded or advanced language programming; Controller has IO state and module status detecting function.
Said switching input module is used to receive water organizational security that collecting device is collected in the production scene, hydroelectric power plant to be protected and uses actuating signal, comprises the operating state signal (heartbeat signal) of tach signal, each guide bearing temperature of generator, pressure oil tank oil pressure, stopping process break pin signal, electric accident signal, main PLC etc.;
Reach the action limit value set in advance in the water protector with actuating signal when the water organizational security that is collected in the production scene, hydroelectric power plant protects, when needing to trigger the accident protection action; Controller triggers the water organizational security through the switching value output module immediately and protects the action exit relay; Act on degaussing switch, the kick off valve or the stop gate of speed governing shutdown, jumping excitation device respectively, the accident that prevents enlarges.
The water organizational security that main PLC is used to receive and real time record is collected in the production scene, hydroelectric power plant protects the analog signals with actuating signal, and the accident that can act on is judged and analysis, searched accident cause.
The working principle of the utility model is:
1) the water protector adopts intelligent controller as nucleus equipment, information processing and execution link that relay control circuit protects as the water organizational security.
2) adopt relay to carry out the node expansion with [emergency conditions] according to types of external signals, be input to respectively then in main PLC and the water protector.
3) the real-time running state of the main PLC of monitoring of water protector, when main PLC power failure, communicating interrupt take place, in the time of situation such as can't normally moving, the water protector will trigger alarm signal.
4) after the protection action, water protector and all storage accidents of main PLC trigger signal, record and the relevant analog value of this protection action in main PLC are reviewed and analysis and judgement as accident simultaneously.
5) the water protector is not directly gathered and is protected the relevant analog amount of trouble-signal with the water organizational security; But carry out data communication and storage with main PLC; Have an accident simultaneously when main PLC breaks down, also can collect and record the relevant analog amount of trouble-signal, so that accident analysis.
Claims (3)
1. water protector based on PLC; It is characterized in that: comprise main PLC, controller and IO module; Said IO module comprises switching input module and switching value output module; Wherein: main PLC is connected with the controller communication, and controller is connected with the switching value output module with switching input module respectively.
2. the water protector based on PLC according to claim 1 is characterized in that: said controller comprises Ethernet interface, 232 interfaces, 485 interfaces and programming port.
3. the water protector based on PLC according to claim 1, it is characterized in that: said controller has double-power source.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2012201049346U CN202531349U (en) | 2012-03-20 | 2012-03-20 | PLC (programmable logic controller)-based hydraulic generator protection device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2012201049346U CN202531349U (en) | 2012-03-20 | 2012-03-20 | PLC (programmable logic controller)-based hydraulic generator protection device |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN202531349U true CN202531349U (en) | 2012-11-14 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2012201049346U Expired - Lifetime CN202531349U (en) | 2012-03-20 | 2012-03-20 | PLC (programmable logic controller)-based hydraulic generator protection device |
Country Status (1)
| Country | Link |
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| CN (1) | CN202531349U (en) |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106368892A (en) * | 2016-10-28 | 2017-02-01 | 四川大唐国际甘孜水电开发有限公司 | Control method for emergency shutdown operating under protection of hydropower station hydraulic machinery |
| CN108167111A (en) * | 2017-08-28 | 2018-06-15 | 福建省水利水电勘测设计研究院 | Machine unit speed regulating device based Cb Failure Protection |
| CN111365188A (en) * | 2020-04-22 | 2020-07-03 | 中国电建集团成都勘测设计研究院有限公司 | Primary overspeed protection system of hydropower station |
| CN114810461A (en) * | 2022-04-12 | 2022-07-29 | 中国长江电力股份有限公司 | Backup protection method for water machine of giant hydroelectric generating set |
-
2012
- 2012-03-20 CN CN2012201049346U patent/CN202531349U/en not_active Expired - Lifetime
Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106368892A (en) * | 2016-10-28 | 2017-02-01 | 四川大唐国际甘孜水电开发有限公司 | Control method for emergency shutdown operating under protection of hydropower station hydraulic machinery |
| CN106368892B (en) * | 2016-10-28 | 2018-07-06 | 四川大唐国际甘孜水电开发有限公司 | A kind of accidental shutdown method of controlling operation thereof in hydraulic mechanical protection |
| CN108167111A (en) * | 2017-08-28 | 2018-06-15 | 福建省水利水电勘测设计研究院 | Machine unit speed regulating device based Cb Failure Protection |
| CN108167111B (en) * | 2017-08-28 | 2024-07-26 | 福建省水利水电勘测设计研究院 | Failure protection device for unit speed regulator |
| CN111365188A (en) * | 2020-04-22 | 2020-07-03 | 中国电建集团成都勘测设计研究院有限公司 | Primary overspeed protection system of hydropower station |
| CN114810461A (en) * | 2022-04-12 | 2022-07-29 | 中国长江电力股份有限公司 | Backup protection method for water machine of giant hydroelectric generating set |
| CN114810461B (en) * | 2022-04-12 | 2023-05-16 | 中国长江电力股份有限公司 | Water machine backup protection method for giant hydroelectric generating set |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CX01 | Expiry of patent term |
Granted publication date: 20121114 |
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| CX01 | Expiry of patent term |