CN2548343Y - Generator stator inner-cooled water-break automatic load-limiting protection apapratus - Google Patents
Generator stator inner-cooled water-break automatic load-limiting protection apapratus Download PDFInfo
- Publication number
- CN2548343Y CN2548343Y CN 02264839 CN02264839U CN2548343Y CN 2548343 Y CN2548343 Y CN 2548343Y CN 02264839 CN02264839 CN 02264839 CN 02264839 U CN02264839 U CN 02264839U CN 2548343 Y CN2548343 Y CN 2548343Y
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- CN
- China
- Prior art keywords
- programmable logic
- logic controller
- touch screen
- computer interface
- power
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- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired - Lifetime
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Abstract
The utility model relates to an automatic cold water and water cut-off loading limit protection device of the generator stator, consisting of a programmable controller, a power supply, a touch panel human computer interface, an AD conversion module, a current sensor, a voltage sensor, a power angle transmitter and a relay. During the loading limit process, the utility model sends the signal of reducing active power to the steam turbine digital electrohydraulic adjusting device, and simultaneously the utility model achieves the constant power factor operation according to the large turbogenerator power factor value and the excitation control of the automatic excitation voltage adjusting device of the turbogenerator. The utility model has the advantages of reducing the load to prevent the damage and the machine trip caused by the high temperature of the stator owing to the water cut-off of the large turbogenerator, therefore avoids great economic loss.
Description
Technical field:
The utility model relates to a kind of generator unit stator cold-water waterless automatic overload protective device that is used for power plant, belongs to large turbo-type generator protective device technical field.
Background technology:
At present; domestic large turbo-type generator as 125MW, 300MW, 600MW all adopts stator inner cold water circulating cooling system; when reasons such as circulating water pump fault, filter screen obstruction cause that the generator unit stator inner cold water is cut off the water supply fault; in order to protect stator winding not damage because of heating; all must take safeguard measure; traditional method is to adopt the salvo of the time-delay jumping machine of cutting off the water supply; as the 30 seconds jumping machines of time-delay of cutting off the water supply; the maintainer overhauls behind unit jumping machine, jumps the massive losses that machine all can cause hundreds of thousands unit at every turn.
Summary of the invention:
The purpose of this utility model is invented a kind of generator unit stator cold-water waterless automatic overload protective device exactly; when generator unit stator generation inner cold water is cut off the water supply fault; the generating function reduces load does not automatically shut down as far as possible, and the maintainer can overhaul under the state of not jumping machine.
For realizing above purpose; the technical solution of the utility model provides a kind of generator unit stator cold-water waterless automatic overload protective device; its characteristics are; it is by Programmable Logic Controller; power supply; touch screen human-computer interface; the AD modular converter; current sensor; voltage sensor; power angle transmitter and relay are formed; power supply is connected with realizing the touch screen human-computer interface of setting with showing; touch screen human-computer interface is connected with cable with Programmable Logic Controller; switching value input cut off the water supply and and net state to Programmable Logic Controller; the analog quantity of coming from generator is input to the current sensor that is connected with power supply respectively; voltage sensor; power angle transmitter and conductivity signal input terminal; AD modular converter by 4 passages converts digital quantity input Programmable Logic Controller to; Programmable Logic Controller sends signal and exports through the switching value lead-out terminal by relay, and output signal has tripping operation; to steam turbine digital electrohydraulic control equipment load down; the automatic magnetic exciting voltage regulating device increases encourages; the automatic magnetic exciting voltage regulating device subtracts encourages; report to the police; to permanent COS ф mode of automatic magnetic exciting voltage regulating device and cutter.
The utility model has the advantages that;
Generator unit stator cold-water waterless automatic overload protective device according to large turbo-type generator stator boiler water circulation pressure changing by the given automatic load down of the characteristic curve of cutting off the water supply, thereby avoid large turbo-type generator to cause because of cutting off the water supply that stator temperature rise is too high to be damaged and the directly heavy economic losses that causes of the machine of jumping as far as possible.
2. adopt computer technology and color touch screen man-machine interface, the operating mode that the characteristic of can the intactly online again demonstration large turbo-type generator of system cutting off the water supply is relevant and the working condition of generator unit stator cold-water waterless automatic overload protective device.
3. the user can set its protection range by color touch screen man-machine interface easily according to oneself turbo generator power and field condition.
4. the every important parameter in the time of writing down the generation of circulation fault automatically in the large turbo-type generator load down process, in the load down process,, the jumping machine then writes down its time and reason simultaneously, for the reason that analysis of failure produces avoids similar fault that foundation is provided once more as taking place.
Description of drawings:
Fig. 1 is a generator unit stator cold-water waterless automatic overload protective device line map;
Fig. 2 is a generator unit stator cold-water waterless automatic overload protective device operational flowchart.
Embodiment:
Fig. 1 is a generator unit stator cold-water waterless automatic overload protective device line map; it is by Programmable Logic Controller U1; power supply U2; touch screen human-computer interface U3; AD modular converter U4; power supply U5; current sensor CT; voltage sensor PT; power angle transmitter U8 and relay J 0～J7 form; Programmable Logic Controller U1 is a core component of having control program stationed; the work that can coordinate each parts is to reach the purpose of generator unit stator cold-water waterless automatic overload; power supply U2 is connected with realizing the touch screen human-computer interface U3 that sets with showing; CON1 is the stube cable of touch screen human-computer interface U3 and Programmable Logic Controller U1; CON2 is the communication stube cable of touch screen human-computer interface U3 and host computer; switching value XP1.1～XP1.7 terminal input cut off the water supply and and net state to Programmable Logic Controller U1; the analog quantity of coming from generator is input to the current sensor CT that is connected with power supply U5 respectively; voltage sensor PT; power angle transmitter U8 and conductivity signal lead-out terminal XP3.7-XP3.8; AD modular converter U4 by CH1～CH4 4 passages converts digital quantity input Programmable Logic Controller U1 to; Programmable Logic Controller U1 sends signal and exports through switching value lead-out terminal XP2 and XP3 by relay J 1～J7, and output signal has tripping operation; to steam turbine digital electrohydraulic control equipment DEH load down; automatic magnetic exciting voltage regulating device AVR increases and encourages; automatic magnetic exciting voltage regulating device AVR subtracts and encourages; report to the police; to permanent COS ф mode of automatic magnetic exciting voltage regulating device AVR and cutter.
When generator unit stator is cut off the water supply fault, be installed in three differential pressure switch actions in the stator inner cold water system, pass to Programmable Logic Controller by switching value, Programmable Logic Controller can be coordinated the work of each parts and send three instructions according to the characteristic of cutting off the water supply that the generator unit stator heating is allowed, one is reported to the police, and prompting operations staff generator has been cut off the water supply and entered automatic limited load state; It two is delivered to the steam turbine digital electrohydraulic control equipment to signal burden with power is reduced to specified about 15%, the sustainable operation 1 hour during of conductivity before cut off the water supply less than set point, after this still can not eliminate as the water system fault, then send cutting machine signal, as the conductivity before cutting off the water supply is during greater than set point, and Programmable Logic Controller sent cutting machine signal after 2 minutes.If cooling water is restored again, then the limit for tonnage timing loop is oppositely delayed time, and the operations staff can increase generator load again behind the about 5 minutes bells; Thereby it three is delivered to the automatic magnetic exciting voltage regulating device to signal and reduces load or burden without work and make meritorious and idle synchronous decline; maintenance power factor (PF) COS ф's is constant; after generator enters the automatic load limitation state; Programmable Logic Controller will start the stator current monitoring circuit to detect the size of generator unit stator electric current; and compare with the stator characteristic of cutting off the water supply; when the former surpassed the latter, backup protection was sent jumping machine signal through suitable time-delay.
Fig. 2 is a generator unit stator cold-water waterless automatic overload protective device operational flowchart.This device adopts color touch screen man-machine interface; after turning on the power switch; the touch-screen picture shows beginning two words; begin two words with hand touch screen curtain; picture shows three sub-function module; be respectively monitored picture; parameter setting and limit for tonnage record queries; tangible different submodule button enters corresponding functional modules; touch four words of monitored picture; this picture just demonstrates the generator system state relevant with water cut-off protection, and the information of its demonstration has: have or not the generation of cutting off the water supply; whether conductivity is normal; whether generator is incorporated into the power networks; limit for tonnage warning output situation; state to steam turbine digital electrohydraulic control equipment limited load signal; to the automatic magnetic exciting voltage regulating device and increase and encourage or subtract the situation of encouraging; the current monitor situation; conductivity timer situation; cutting machine signal output situation; the electric current of generator; voltage; power; power factor (PF); the threshold values of current monitor; the current time etc.
Touch four words of parameter setting, just can set the generator unit stator part throttle characteristics of cutting off the water supply, conductivity range, the current limit threshold values, the power factor (PF) bound, the excitation regulation cycle, parameters such as timing cycle, for preventing the unrelated person misoperation, need before parameter setting, to input password, enter the password input by parameter setup key, the input password is by affirmation and enter parameter setting, parameter setting is divided into parameter setting 1, parameter setting 2, parameter setting 3, enter the data that parameter setting 1 is set from the keyboard input, confirm to go to parameter setting 2 and parameter setting 3 after the input by the ENT key.
Data in the parameter setting 1 have: PT no-load voltage ratio, CT no-load voltage ratio, conductivity transmitter scope, the setting of conductivity transmitter, power factor (PF) upper control limit, power factor (PF) lower control limit, the threshold values upper limit of current monitor, the lower threshold of current monitor.
Time data in the parameter setting 2 has: the limit for tonnage timer starts time-delay, limit for tonnage timer to be removed time-delay, watchdog timer and starts time-delay, watchdog timer and remove time-delay, excitation regulation cycle, overcurrent and delay time.
Data in the parameter setting 3 have: limit for tonnage sample record number, limit for tonnage sampling interval.
Touch six words of limit for tonnage record queries, just can inquire about because of voltage, electric current, power factor, these major parameters of conductivity after the situations such as cutter, tripping operation take place of cutting off the water supply, also can inquire about the record of continuous sampling, the limit for tonnage record queries divides limit for tonnage record queries 1, limit for tonnage record queries 2, limit for tonnage record queries 3
Have in the limit for tonnage record queries 1: the electric current in the time of cutting off the water supply, when cutting off the water supply, voltage, power factor, conductivity, limit for tonnage are removed time, electric current, voltage, power factor, conductivity when removing.
Have in the limit for tonnage record queries 2: the electric current when cutter time, cutter, voltage, power factor, conductivity, the threshold values of the electric current when overcurrent tripping time, overcurrent tripping, voltage, power factor, conductivity and current monitor.
Have in the limit for tonnage record queries 3: the record that the continuous sampling after the generation of cutting off the water supply obtains, wherein content comprises the threshold values of time, electric current, voltage, power factor, conductivity and current monitor.
Claims (1)
1. generator unit stator cold-water waterless automatic overload protective device; it is characterized in that; it is by Programmable Logic Controller U1; power supply U2; touch screen human-computer interface U3; AD modular converter U4; power supply U5; current sensor CT; voltage sensor PT; power angle transmitter U8 and relay J 0～J7 form; power supply U2 is connected with realizing the touch screen human-computer interface U3 that sets with showing; CON1 is the stube cable of touch screen human-computer interface U3 and Programmable Logic Controller U1; CON2 is the communication stube cable of touch screen human-computer interface U3 and host computer; switching value XP1.1～XP1.7 terminal input cut off the water supply and and net state to Programmable Logic Controller U1; the analog quantity of coming from generator is input to the current sensor CT that is connected with power supply U5 respectively; voltage sensor PT; power angle transmitter U8 and conductivity signal lead-out terminal XP3.7-XP3.8; AD modular converter U4 by CH1～CH44 passage converts digital quantity input Programmable Logic Controller U1 to; Programmable Logic Controller U1 sends signal and exports through switching value lead-out terminal XP2 and XP3 by relay J 1～J7, and output signal has tripping operation; to steam turbine digital electrohydraulic control equipment DEH load down; automatic magnetic exciting voltage regulating device AVR increases and encourages; automatic magnetic exciting voltage regulating device AVR subtracts and encourages; report to the police; to permanent COS ф mode of automatic magnetic exciting voltage regulating device AVR and cutter.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 02264839 CN2548343Y (en) | 2002-06-18 | 2002-06-18 | Generator stator inner-cooled water-break automatic load-limiting protection apapratus |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 02264839 CN2548343Y (en) | 2002-06-18 | 2002-06-18 | Generator stator inner-cooled water-break automatic load-limiting protection apapratus |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN2548343Y true CN2548343Y (en) | 2003-04-30 |
Family
ID=33730973
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 02264839 Expired - Lifetime CN2548343Y (en) | 2002-06-18 | 2002-06-18 | Generator stator inner-cooled water-break automatic load-limiting protection apapratus |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN2548343Y (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN100521454C (en) * | 2004-12-31 | 2009-07-29 | 中国科学院电工研究所 | Evaporating and cooling system monitoring and protection controlling device for generator stator |
-
2002
- 2002-06-18 CN CN 02264839 patent/CN2548343Y/en not_active Expired - Lifetime
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN100521454C (en) * | 2004-12-31 | 2009-07-29 | 中国科学院电工研究所 | Evaporating and cooling system monitoring and protection controlling device for generator stator |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C17 | Cessation of patent right | ||
| CX01 | Expiry of patent term |
Expiration termination date: 20120618 Granted publication date: 20030430 |