CN109936118B - Fault processing device for power generation system - Google Patents
Fault processing device for power generation system Download PDFInfo
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- CN109936118B CN109936118B CN201811615479.4A CN201811615479A CN109936118B CN 109936118 B CN109936118 B CN 109936118B CN 201811615479 A CN201811615479 A CN 201811615479A CN 109936118 B CN109936118 B CN 109936118B
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Abstract
The invention discloses a power generation system fault processing device which comprises a fault confirmation module, a microcontroller, a fault processing module and a remote communication module, wherein the fault confirmation module is used for confirming the fault of a power generation system; the fault confirmation module is used for judging whether the power generation system has violent oscillation or whether a generator in a power plant loses synchronization, and if so, sending fault representation information to the microcontroller; the microcontroller sends a fault processing instruction to the fault processing module when detecting the fault representation information; the fault processing module starts a processing program when receiving the fault processing instruction; the microcontroller sends information to a schedule through the remote communication module. The fault processing device of the power generation system disclosed by the invention can identify the fault in time and process the fault rapidly.
Description
Technical Field
The invention relates to the technical field of electric power, in particular to a fault processing device for a power generation system.
Background
With the increasing demand of people for living intelligence, various electric appliances are full of the lives of people. Due to the adoption of different principles, the electric appliances enrich the load with single characteristic existing in the original power system, and realize qualitative change compared with the prior art in terms of the nature of the load and the quantity of the load.
These loads complicate the original power system, and as a result, the butterfly effect is significantly aggravated, and a very small problem may cause the breakdown of the whole system. Therefore, finding problems and realizing treatment in time are technical problems to be solved urgently by the current power system.
Disclosure of Invention
Therefore, in view of the above problems, the present invention provides a fault handling device for a power generation system, which is applied in a power plant to detect whether a power system is in violent oscillation or a generator in the power plant is out of synchronization, and quickly implement handling so that the power plant always maintains a safe and stable operation state if the power system is in violent oscillation or the generator is out of synchronization.
In order to achieve the above object, the present invention provides a power generation system fault handling device, which is characterized in that the power generation system fault handling device comprises a fault confirmation module, a microcontroller, a fault handling module, and a remote communication module; the fault confirmation module is used for judging whether the power generation system has violent oscillation or whether a generator in a power plant loses synchronization, and if so, sending fault representation information to the microcontroller; the microcontroller sends a fault processing instruction to the fault processing module when detecting the fault representation information; the fault processing module starts a processing program when receiving the fault processing instruction; the microcontroller sends information to a schedule through the remote communication module.
The power generation system fault processing device further meets the following conditions: the fault confirmation module comprises a first-fourth fault confirmation submodule; the first fault confirmation submodule judges whether voltage, current, active power and reactive power indications of a generator, a transformer and a line are periodically and greatly lifted or not, and if so, first confirmation information is output to the second fault confirmation submodule; the second fault confirmation submodule judges whether the lighting lamp is bright or dark along with voltage fluctuation when receiving the first confirmation information, and if so, the second fault confirmation submodule outputs second confirmation information to a third fault confirmation submodule; the third fault confirmation submodule judges whether the generator sends out rhythmic singing sound or not when receiving the second confirmation information, and if so, the third fault confirmation submodule outputs third confirmation information to the fourth fault confirmation submodule; and the fourth fault confirmation submodule judges whether the out-of-step protection of the unit acts or trips, and if so, outputs the characterization information of the fault.
The power generation system fault processing device further meets the following conditions: the processing procedure is as follows:
(1) the AVC is immediately quitted, the exciting current is manually increased, the accident overload capacity of the generator is fully utilized, the system voltage is gradually increased to the highest allowable value, whether the fault representation information disappears or not is judged in real time in the process, if yes, the process is finished, and if not, the process is transferred to the step (2);
(2) judging the change direction of the real-time frequency, if the change direction is upward, namely the frequency is increased, rapidly reducing the active output of the generator until the oscillation disappears, but the frequency is not lower than 49.5 Hz; if the change direction is downward, namely the frequency is reduced, the active output of the generator is increased by fully utilizing the spare capacity and the accident overload capacity until the oscillation is eliminated or the normal frequency is recovered;
(3) judging whether the fault representation information disappears, if so, ending, otherwise, turning to the step (4);
(4) the active power output of the generator is reduced, and excitation is increased, so that the generator is dragged to be synchronous;
(5) judging whether synchronous operation is recovered and the out-of-step protection is not operated, if so, splitting the generator set, otherwise, recovering the operation of the generator set under the condition that the excitation system has no fault;
(6) judging whether the fault representation information disappears, if so, ending, otherwise, turning to the step (7);
(7) and implementing a synchronous loop closing, judging whether the fault representation information disappears at a preset time, finishing the judgment if the fault representation information disappears, and otherwise sending a request to the microcontroller for processing the information.
The power generation system fault processing device further meets the following conditions: and the microcontroller sends information to the scheduling module through the remote communication module after receiving the request processing information.
The power generation system fault processing device further meets the following conditions: the remote communication module comprises a wireless communication module which realizes communication by adopting a wireless network.
The power generation system fault processing device further meets the following conditions: the wireless network is 3G, 4G, WIFI, etc.
The power generation system fault processing device further meets the following conditions: the predetermined time is 3 to 4 minutes.
Drawings
Fig. 1 is a configuration diagram of a power generation system fault handling device.
Detailed Description
Please refer to fig. 1.
The power generation system fault processing device is characterized by comprising a fault confirmation module, a microcontroller, a fault processing module and a remote communication module; the fault confirmation module is used for judging whether the power generation system has violent oscillation or whether a generator in a power plant loses synchronization, and if so, sending fault representation information to the microcontroller; the microcontroller sends a fault processing instruction to the fault processing module when detecting the fault representation information; the fault processing module starts a processing program when receiving the fault processing instruction; the microcontroller sends information to a schedule through the remote communication module.
The fault confirmation module comprises a first-fourth fault confirmation submodule; the first fault confirmation submodule judges whether voltage, current, active power and reactive power indications of a generator, a transformer and a line are periodically and greatly lifted or not, and if so, first confirmation information is output to the second fault confirmation submodule; the second fault confirmation submodule judges whether the lighting lamp is bright or dark along with voltage fluctuation when receiving the first confirmation information, and if so, the second fault confirmation submodule outputs second confirmation information to a third fault confirmation submodule; the third fault confirmation submodule judges whether the generator sends out rhythmic singing sound or not when receiving the second confirmation information, and if so, the third fault confirmation submodule outputs third confirmation information to the fourth fault confirmation submodule; and the fourth fault confirmation submodule judges whether the out-of-step protection of the unit acts or trips, and if so, outputs the characterization information of the fault.
The processing procedure is as follows:
(1) the AVC is immediately quitted, the exciting current is manually increased, the accident overload capacity of the generator is fully utilized, the system voltage is gradually increased to the highest allowable value, whether the fault representation information disappears or not is judged in real time in the process, if yes, the process is finished, and if not, the process is transferred to the step (2);
(2) judging the change direction of the real-time frequency, if the change direction is upward, namely the frequency is increased, rapidly reducing the active output of the generator until the oscillation disappears, but the frequency is not lower than 49.5 Hz; if the change direction is downward, namely the frequency is reduced, the active output of the generator is increased by fully utilizing the spare capacity and the accident overload capacity until the oscillation is eliminated or the normal frequency is recovered;
(3) judging whether the fault representation information disappears, if so, ending, otherwise, turning to the step (4);
(4) the active power output of the generator is reduced, and excitation is increased, so that the generator is dragged to be synchronous;
(5) judging whether synchronous operation is recovered and the out-of-step protection is not operated, if so, splitting the generator set, otherwise, recovering the operation of the generator set under the condition that the excitation system has no fault;
(6) judging whether the fault representation information disappears, if so, ending, otherwise, turning to the step (7);
(7) and implementing a synchronous loop closing, judging whether the fault representation information disappears at a preset time, finishing the judgment if the fault representation information disappears, and otherwise sending a request to the microcontroller for processing the information.
And the microcontroller sends information to the scheduling module through the remote communication module after receiving the request processing information.
The remote communication module comprises a wireless communication module which realizes communication by adopting a wireless network.
The wireless network is 3G, 4G, WIFI, etc.
The predetermined time is 3 to 4 minutes.
It should be noted that the above-mentioned embodiments are provided for further detailed description of the present invention, and the present invention is not limited to the above-mentioned embodiments, and those skilled in the art can make various modifications and variations on the above-mentioned embodiments without departing from the scope of the present invention.
Claims (5)
1. The power generation system fault processing device is characterized by comprising a fault confirmation module, a microcontroller, a fault processing module and a remote communication module; the fault confirmation module is used for judging whether the power generation system has violent oscillation or whether a generator in a power plant loses synchronization, and if so, sending fault representation information to the microcontroller; the microcontroller sends a fault processing instruction to the fault processing module when detecting the fault representation information; the fault processing module starts a processing program when receiving the fault processing instruction; the microcontroller sends information to a schedule through the remote communication module; the fault confirmation module comprises a first-fourth fault confirmation submodule; the first fault confirmation submodule judges whether voltage, current, active power and reactive power indications of a generator, a transformer and a line are periodically and greatly lifted or not, and if so, first confirmation information is output to the second fault confirmation submodule; the second fault confirmation submodule judges whether the lighting lamp is bright or dark along with voltage fluctuation when receiving the first confirmation information, and if so, the second fault confirmation submodule outputs second confirmation information to a third fault confirmation submodule; the third fault confirmation submodule judges whether the generator sends out rhythmic singing sound or not when receiving the second confirmation information, and if so, the third fault confirmation submodule outputs third confirmation information to the fourth fault confirmation submodule; the fourth fault confirming submodule judges whether the out-of-step protection of the unit acts or trips, and if so, outputs the characterization information of the fault; the processing procedure is as follows: (1) the AVC is immediately quitted, the exciting current is manually increased, the accident overload capacity of the generator is fully utilized, the system voltage is gradually increased to the highest allowable value, whether the fault representation information disappears or not is judged in real time in the process, if yes, the process is finished, and if not, the process is transferred to the step (2);
(2) judging the change direction of the real-time frequency, if the change direction is upward, namely the frequency is increased, rapidly reducing the active output of the generator until the oscillation disappears, but the frequency is not lower than 49.5 Hz; if the change direction is downward, namely the frequency is reduced, the active output of the generator is increased by fully utilizing the spare capacity and the accident overload capacity until the oscillation is eliminated or the normal frequency is recovered;
(3) judging whether the fault representation information disappears, if so, ending, otherwise, turning to the step (4);
(4) the active power output of the generator is reduced, and excitation is increased, so that the generator is dragged to be synchronous;
(5) judging whether synchronous operation is recovered and the out-of-step protection is not operated, if so, splitting the generator set, otherwise, recovering the operation of the generator set under the condition that the excitation system has no fault;
(6) judging whether the fault representation information disappears, if so, ending, otherwise, turning to the step (7);
(7) and implementing a synchronous loop closing, judging whether the fault representation information disappears at a preset time, finishing the judgment if the fault representation information disappears, and otherwise sending a request to the microcontroller for processing the information.
2. The power generation system fault handling device of claim 1, wherein the microcontroller sends information to a dispatch via the remote communication module after receiving the requested processing information.
3. The power generation system fault handling device of claim 2, wherein the remote communication module comprises a wireless communication module that communicates using a wireless network.
4. The power generation system fault handling device of claim 3, wherein the wireless network is 3G, 4G, WIFI.
5. The power generation system fault handling device of claim 4, wherein the predetermined time is 3 to 4 minutes.
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Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102820673A (en) * | 2012-08-10 | 2012-12-12 | 沈阳工业大学 | Multiterminal flexible direct current power transmission system included power grid operation control system and method |
| CN104091087A (en) * | 2014-07-22 | 2014-10-08 | 武汉大学 | Asynchronous oscillation separation criterion based on bus voltage frequency |
| CN204517421U (en) * | 2015-04-15 | 2015-07-29 | 南京大全自动化科技有限公司 | A kind of electricity generation system fault disconnection device |
| CN105529704A (en) * | 2016-02-22 | 2016-04-27 | 东北大学 | Power grid out-of-step disconnecting control system and method |
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- 2019-03-19 CN CN201811615479.4A patent/CN109936118B/en active Active
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102820673A (en) * | 2012-08-10 | 2012-12-12 | 沈阳工业大学 | Multiterminal flexible direct current power transmission system included power grid operation control system and method |
| CN104091087A (en) * | 2014-07-22 | 2014-10-08 | 武汉大学 | Asynchronous oscillation separation criterion based on bus voltage frequency |
| CN204517421U (en) * | 2015-04-15 | 2015-07-29 | 南京大全自动化科技有限公司 | A kind of electricity generation system fault disconnection device |
| CN105529704A (en) * | 2016-02-22 | 2016-04-27 | 东北大学 | Power grid out-of-step disconnecting control system and method |
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