CN112311086A - Intelligent standby power supply system for hydropower station dam - Google Patents
Intelligent standby power supply system for hydropower station dam Download PDFInfo
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- CN112311086A CN112311086A CN202011300327.2A CN202011300327A CN112311086A CN 112311086 A CN112311086 A CN 112311086A CN 202011300327 A CN202011300327 A CN 202011300327A CN 112311086 A CN112311086 A CN 112311086A
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02J—CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
- H02J9/00—Circuit arrangements for emergency or stand-by power supply, e.g. for emergency lighting
- H02J9/04—Circuit arrangements for emergency or stand-by power supply, e.g. for emergency lighting in which the distribution system is disconnected from the normal source and connected to a standby source
- H02J9/06—Circuit arrangements for emergency or stand-by power supply, e.g. for emergency lighting in which the distribution system is disconnected from the normal source and connected to a standby source with automatic change-over, e.g. UPS systems
- H02J9/08—Circuit arrangements for emergency or stand-by power supply, e.g. for emergency lighting in which the distribution system is disconnected from the normal source and connected to a standby source with automatic change-over, e.g. UPS systems requiring starting of a prime-mover
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02J—CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
- H02J13/00—Circuit arrangements for providing remote indication of network conditions, e.g. an instantaneous record of the open or closed condition of each circuitbreaker in the network; Circuit arrangements for providing remote control of switching means in a power distribution network, e.g. switching in and out of current consumers by using a pulse code signal carried by the network
- H02J13/00001—Circuit arrangements for providing remote indication of network conditions, e.g. an instantaneous record of the open or closed condition of each circuitbreaker in the network; Circuit arrangements for providing remote control of switching means in a power distribution network, e.g. switching in and out of current consumers by using a pulse code signal carried by the network characterised by the display of information or by user interaction, e.g. supervisory control and data acquisition systems [SCADA] or graphical user interfaces [GUI]
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02J—CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
- H02J13/00—Circuit arrangements for providing remote indication of network conditions, e.g. an instantaneous record of the open or closed condition of each circuitbreaker in the network; Circuit arrangements for providing remote control of switching means in a power distribution network, e.g. switching in and out of current consumers by using a pulse code signal carried by the network
- H02J13/00002—Circuit arrangements for providing remote indication of network conditions, e.g. an instantaneous record of the open or closed condition of each circuitbreaker in the network; Circuit arrangements for providing remote control of switching means in a power distribution network, e.g. switching in and out of current consumers by using a pulse code signal carried by the network characterised by monitoring
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02J—CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
- H02J13/00—Circuit arrangements for providing remote indication of network conditions, e.g. an instantaneous record of the open or closed condition of each circuitbreaker in the network; Circuit arrangements for providing remote control of switching means in a power distribution network, e.g. switching in and out of current consumers by using a pulse code signal carried by the network
- H02J13/00006—Circuit arrangements for providing remote indication of network conditions, e.g. an instantaneous record of the open or closed condition of each circuitbreaker in the network; Circuit arrangements for providing remote control of switching means in a power distribution network, e.g. switching in and out of current consumers by using a pulse code signal carried by the network characterised by information or instructions transport means between the monitoring, controlling or managing units and monitored, controlled or operated power network element or electrical equipment
- H02J13/00016—Circuit arrangements for providing remote indication of network conditions, e.g. an instantaneous record of the open or closed condition of each circuitbreaker in the network; Circuit arrangements for providing remote control of switching means in a power distribution network, e.g. switching in and out of current consumers by using a pulse code signal carried by the network characterised by information or instructions transport means between the monitoring, controlling or managing units and monitored, controlled or operated power network element or electrical equipment using a wired telecommunication network or a data transmission bus
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02J—CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
- H02J13/00—Circuit arrangements for providing remote indication of network conditions, e.g. an instantaneous record of the open or closed condition of each circuitbreaker in the network; Circuit arrangements for providing remote control of switching means in a power distribution network, e.g. switching in and out of current consumers by using a pulse code signal carried by the network
- H02J13/00006—Circuit arrangements for providing remote indication of network conditions, e.g. an instantaneous record of the open or closed condition of each circuitbreaker in the network; Circuit arrangements for providing remote control of switching means in a power distribution network, e.g. switching in and out of current consumers by using a pulse code signal carried by the network characterised by information or instructions transport means between the monitoring, controlling or managing units and monitored, controlled or operated power network element or electrical equipment
- H02J13/00022—Circuit arrangements for providing remote indication of network conditions, e.g. an instantaneous record of the open or closed condition of each circuitbreaker in the network; Circuit arrangements for providing remote control of switching means in a power distribution network, e.g. switching in and out of current consumers by using a pulse code signal carried by the network characterised by information or instructions transport means between the monitoring, controlling or managing units and monitored, controlled or operated power network element or electrical equipment using wireless data transmission
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02J—CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
- H02J9/00—Circuit arrangements for emergency or stand-by power supply, e.g. for emergency lighting
- H02J9/04—Circuit arrangements for emergency or stand-by power supply, e.g. for emergency lighting in which the distribution system is disconnected from the normal source and connected to a standby source
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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
- Y02B—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO BUILDINGS, e.g. HOUSING, HOUSE APPLIANCES OR RELATED END-USER APPLICATIONS
- Y02B10/00—Integration of renewable energy sources in buildings
- Y02B10/70—Hybrid systems, e.g. uninterruptible or back-up power supplies integrating renewable energies
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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
- Y02B—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO BUILDINGS, e.g. HOUSING, HOUSE APPLIANCES OR RELATED END-USER APPLICATIONS
- Y02B70/00—Technologies for an efficient end-user side electric power management and consumption
- Y02B70/30—Systems integrating technologies related to power network operation and communication or information technologies for improving the carbon footprint of the management of residential or tertiary loads, i.e. smart grids as climate change mitigation technology in the buildings sector, including also the last stages of power distribution and the control, monitoring or operating management systems at local level
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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
- Y02B—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO BUILDINGS, e.g. HOUSING, HOUSE APPLIANCES OR RELATED END-USER APPLICATIONS
- Y02B90/00—Enabling technologies or technologies with a potential or indirect contribution to GHG emissions mitigation
- Y02B90/20—Smart grids as enabling technology in buildings sector
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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
- Y04—INFORMATION OR COMMUNICATION TECHNOLOGIES HAVING AN IMPACT ON OTHER TECHNOLOGY AREAS
- Y04S—SYSTEMS INTEGRATING TECHNOLOGIES RELATED TO POWER NETWORK OPERATION, COMMUNICATION OR INFORMATION TECHNOLOGIES FOR IMPROVING THE ELECTRICAL POWER GENERATION, TRANSMISSION, DISTRIBUTION, MANAGEMENT OR USAGE, i.e. SMART GRIDS
- Y04S20/00—Management or operation of end-user stationary applications or the last stages of power distribution; Controlling, monitoring or operating thereof
- Y04S20/12—Energy storage units, uninterruptible power supply [UPS] systems or standby or emergency generators, e.g. in the last power distribution stages
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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
- Y04—INFORMATION OR COMMUNICATION TECHNOLOGIES HAVING AN IMPACT ON OTHER TECHNOLOGY AREAS
- Y04S—SYSTEMS INTEGRATING TECHNOLOGIES RELATED TO POWER NETWORK OPERATION, COMMUNICATION OR INFORMATION TECHNOLOGIES FOR IMPROVING THE ELECTRICAL POWER GENERATION, TRANSMISSION, DISTRIBUTION, MANAGEMENT OR USAGE, i.e. SMART GRIDS
- Y04S20/00—Management or operation of end-user stationary applications or the last stages of power distribution; Controlling, monitoring or operating thereof
- Y04S20/20—End-user application control systems
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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
- Y04—INFORMATION OR COMMUNICATION TECHNOLOGIES HAVING AN IMPACT ON OTHER TECHNOLOGY AREAS
- Y04S—SYSTEMS INTEGRATING TECHNOLOGIES RELATED TO POWER NETWORK OPERATION, COMMUNICATION OR INFORMATION TECHNOLOGIES FOR IMPROVING THE ELECTRICAL POWER GENERATION, TRANSMISSION, DISTRIBUTION, MANAGEMENT OR USAGE, i.e. SMART GRIDS
- Y04S20/00—Management or operation of end-user stationary applications or the last stages of power distribution; Controlling, monitoring or operating thereof
- Y04S20/20—End-user application control systems
- Y04S20/248—UPS systems or standby or emergency generators
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- Engineering & Computer Science (AREA)
- Power Engineering (AREA)
- Business, Economics & Management (AREA)
- Emergency Management (AREA)
- Computer Networks & Wireless Communication (AREA)
- Human Computer Interaction (AREA)
- Supply And Distribution Of Alternating Current (AREA)
Abstract
The invention discloses an intelligent standby power supply system for a dam of a hydropower station, which comprises two groups of standby power supply devices which are mutually communicated, wherein the standby power supply devices are connected through a communication circuit breaker; the output end of the transformer is provided with a control switch, two sides of the control switch are respectively provided with a voltage measuring sensor, the output end of the transformer is also connected with a diesel generator in parallel, and the output end of the diesel generator is provided with the voltage measuring sensor and the control switch; according to the invention, double backup of the standby power supply is realized through the two groups of standby power supplies and the diesel generator, so that the stability of the standby power supply is greatly improved; meanwhile, the control circuit comprises a voltage measurement sensor and a circuit control switch, so that the circuit structure of the whole system is greatly simplified, the reliability and the stability of operation are improved, and the power grid can be ensured to be in fault.
Description
Technical Field
The invention relates to the technical field of power systems, in particular to an intelligent standby power supply system for a hydropower station dam.
Background
The large dam of the hydropower station is an important component of the hydropower station and has the functions of regulating and storing flood, preventing flood, reducing disaster and the like. In order to realize the function, a regulating gate needs to be arranged on the large dam of the hydropower station, and when flood comes in a flood season, the flood regulation peak shifting, flood control and disaster resistance are realized by regulating the opening of the gate. After the flood situation, the water is blocked by closing the gate so as to improve the comprehensive utilization benefit of water resources. Therefore, whether the dam gate can be opened or closed safely and reliably directly relates to whether the reservoir can be operated safely, reliably and economically; and also relates to the safety of life and property of people at the upstream and downstream of the reservoir basin.
In the prior art, in order to ensure the safe and reliable operation of the dam gate, the dam is provided with a power supply network, and the power supply network is communicated with a power transmission network system of a power station.
Disclosure of Invention
The intelligent standby power supply system for the hydroelectric power station dam ensures stable power supply to the dam by means of multiple groups of backup, self-contained generators and the like, has a simple circuit structure, reduces hardware cost, effectively improves the stability and reliability of equipment, and ensures stable power supply of the dam under extreme working conditions.
An intelligent standby power supply system for a hydropower station dam comprises a controller and two groups of standby power supply devices with the same structure, wherein the two standby power supply devices are mutually communicated through a communication circuit breaker; the standby power supply device comprises a transformer, wherein the input end of the transformer is communicated with a power supply network, and the output end of the transformer is communicated with a load; meanwhile, a control switch for controlling the on-off state of the circuit is also arranged at the output end of the transformer, and a first voltage detection device and a second voltage detection device are respectively arranged on two sides of the control switch; the standby power supply device also comprises a diesel generator connected with the transformer in parallel, and the output end of the diesel generator is provided with a control switch and a third voltage detection device; and the interconnection circuit breaker, the first voltage detection device, the second voltage detection device, the third voltage detection device, the diesel generator and each control switch are respectively connected with the controller.
Preferably, the oil inlet end of the diesel generator is communicated with the diesel reservoir through an oil delivery pipe, and the oil delivery pipe is further provided with a control valve which is connected with the controller.
Preferably, the controller includes interconnect's dual supply module and PLC controller, the PLC controller has the touch-control screen through RS485 bus connection.
Preferably, the controller further comprises a network connection port and a satellite communication module, and the satellite communication module is respectively connected with the PLC controller.
Preferably, the controller further comprises a manual control panel, and a plurality of manual control switches respectively corresponding to the control switches and the control valves one to one are arranged on the manual control panel.
Preferably, the manual control panel is further provided with a control mode change-over switch, a control mode change-over switch and a flood prevention level change-over switch.
Preferably, the first voltage detection device, the second voltage detection device and the third voltage detection device are all voltage measurement sensors.
Preferably, the control switch is an incoming line breaker.
Compared with the prior art, the invention has the following beneficial effects:
1. the invention comprises two groups of standby power supply devices which are mutually communicated, wherein the standby power supply devices are connected through a communication circuit breaker, and each group of standby power supplies comprises a transformer, and the transformer converts the power supply of a commercial power network into electric energy required by a dam power utilization system; the output end of the transformer is provided with a control switch, two sides of the control switch are respectively provided with a voltage measuring sensor, the output end of the transformer is also connected with a diesel generator in parallel, and the output end of the diesel generator is provided with the voltage measuring sensor and the control switch;
in a normal state, a power grid is communicated through a transformer of any one group of standby power supply devices to supply power to a dam, and when one group of standby power supply devices fails, the other group of standby power supply devices are switched to the controller to supply power;
when the external power grid can not provide power, the diesel generator sets in the two groups of standby power supply devices are used for generating power, so that stable power supply to the dam is ensured; meanwhile, when one group of diesel generators fails, the standby group of diesel generators can replace the diesel generators, and compared with a standby power supply system in the prior art, the system has higher stability and reliability, and can effectively ensure continuous and stable power supply to the dam.
The electric elements related in the whole set of standby power supply device only comprise the voltage measuring sensor and the corresponding circuit control switch, so that the circuit structure of the whole set of system is greatly simplified, the reliability and the stability of operation are improved, and the device can play an application role when a power grid fails.
2. The diesel generator is communicated with the diesel reservoir through the oil conveying pipe, and meanwhile, the oil conveying pipe is also provided with the control valve connected with the controller, so that the on-off state of the oil conveying pipe of the diesel generator is controlled through the control valve, the oil supply stability of the diesel generator is ensured, and the stable work of the whole system is further ensured;
3. the controller comprises a dual-power module and a PLC, and the PLC is also connected with a touch screen to display various data of the system, so that workers can know the working state of the whole system in time conveniently, and the operability of the whole system can be effectively improved.
4. The controller also comprises a network connection port and a satellite communication module, the network connection port is in communication connection with a control center such as a master control room and the like, the operation state of the system is fed back upwards in time, the control center is ensured to adjust the working state of each standby power supply system in time, meanwhile, information communication can be carried out with a superior level through the satellite communication module when the network connection fails, the dam can be effectively powered when natural disasters such as earthquakes, flood disasters and the like occur, and corresponding information is fed back in time, so that powerful support is provided for disaster relief and reduction.
Compared with the wireless communication technology in the prior art, the satellite communication module does not depend on the bottom base station, and the communication reliability is higher.
5. The controller also comprises a manual control panel, and the manual control panel is provided with a plurality of manual control switches, so that manual intervention can be effectively ensured to be carried out in time under the condition of automatic control failure, and the stable operation of the system is ensured.
6. The manual control panel is also provided with a control mode change-over switch, a control mode change-over switch and a flood prevention level change-over switch, wherein the control mode change-over switch realizes the change-over between an automatic control mode and a manual control mode; the control mode comprises a conventional control mode and a flood prevention operation mode, and different flood prevention grades are set by combining a flood prevention grade change-over switch, so that different flood prevention requirements are met, the response speed of the standby power supply system is ensured, and the stable power supply of the dam is further ensured; and the staged control further improves the economy of equipment operation.
Drawings
FIG. 1 is a schematic structural view of the present invention;
FIG. 2 is a schematic diagram of a controller;
FIG. 3 is a schematic diagram of a manual control plate according to the present invention;
FIG. 4 is a control schematic of the present invention;
reference numerals: 1. the device comprises a controller, 2, a communication circuit breaker, 3, a transformer, 4, a control switch, 5, a first voltage detection device, 6, a second voltage detection device, 7, a diesel generator, 8, a third voltage detection device, 9, an oil delivery pipe, 10, a diesel warehouse, 11, a control valve, 12, a dual-power module, 13, a PLC controller, 14, a touch screen, 15, a satellite communication module, 16, a manual control panel, 17, a manual control switch, 18, a control mode change-over switch, 19, a control mode change-over switch, 20, a flood prevention level change-over switch, 21 and a network connection port.
Detailed Description
The invention will be further illustrated by the following specific embodiments:
embodiment mode 1
The embodiment is used as a basic embodiment of the invention and discloses an intelligent standby power supply system for a hydropower station dam, which has a specific structure shown in fig. 1 to 3 and comprises a controller 1 and two groups of standby power supply devices with the same structure, wherein each group of standby power supply comprises a transformer 3, the input end of the transformer 3 is communicated with a power supply network, the output end of the transformer 3 is communicated with the dam power supply network through a control switch 4 for controlling the on-off state of a circuit, the end, connected with the dam power supply network, of the transformer 3 is also communicated with the two groups of standby power supply devices through a parallel power supply branch, and a communication circuit breaker 2 is connected to the power supply branch to control the on-off state between the two groups of standby power supply devices; the control switch 4 adopts an incoming line breaker;
a first voltage detection device 5 and a second voltage detection device 6 are respectively arranged on two sides of the control switch 4, wherein the first voltage detection device 5 is used for detecting whether stable voltage is output at the output end of the transformer, and the second voltage detection device 6 is used for detecting whether electric power is transmitted to a dam electric power system; meanwhile, the output end of the control switch 4 is connected in parallel with a diesel generator 7, the ionization output end of the diesel generator 7 is also provided with a control switch and a third voltage detection device 8, and the third voltage detection device 8 is used for detecting whether the diesel generator 7 stably outputs electric power; the first voltage detection device 5, the second voltage detection device 6 and the third voltage detection device 8 all adopt voltage measurement sensors; the oil injection port of the diesel engine 7 is also connected with a diesel oil reservoir 10 through an oil pipeline 9, and the oil pipeline 9 is provided with a control valve 11 for controlling the on-off state of the oil pipeline 9;
the controller 1 comprises a dual power supply module 12 and a PLC 13, wherein the dual power supply module 12 is connected with two power supply lines in common, one power supply line adopts a UPS alternating current power supply, and the other power supply line is connected with a 220V direct current power supply; thereby ensuring the power supply stability of the PLC; meanwhile, the input end of the PLC 13 is also respectively connected with the interconnection breaker 2, the first voltage detection device 5, the second voltage detection device 6, the third voltage detection device 8, the control valve 11 and each control switch 4 through RS485 buses; meanwhile, the PLC 13 is also connected with the touch screen 14 through an RS485 bus.
Embodiment mode 2
As another preferred embodiment of the present invention, the present embodiment discloses an intelligent backup power supply system for a hydroelectric dam based on embodiment 1, and the specific structure of the intelligent backup power supply system is shown in fig. 2 and 3, and includes a controller 1 and two sets of backup power supply devices with the same structure; the controller 1 comprises a dual power supply module 12 and a PLC 13, wherein the dual power supply module 12 is connected with two power supply lines in common, one power supply line adopts a UPS alternating current power supply, and the other power supply line is connected with a 220V direct current power supply; thereby ensuring the power supply stability of the PLC and realizing the power supply to the PLC controller 13; meanwhile, the input end of the PLC 13 is also respectively connected with the interconnection breaker 2, the first voltage detection device 5, the second voltage detection device 6, the third voltage detection device 8, the control valve 11 and each control switch 4 through RS485 buses; meanwhile, the PLC 13 is also connected with a touch screen 14 through an RS485 bus; the controller 1 further comprises a network connection port 21 and a satellite communication module 15, stable communication connection is achieved with a rear-end control console through wired network and wireless satellite communication, remote monitoring and control over power stations far away from cities are facilitated, and reliability and stability of operation of equipment are improved.
The controller 1 further comprises a manual control panel 16, a plurality of manual control switches 14 are arranged on the manual control panel 16, and each manual control switch 17 is in one-to-one correspondence with each control switch 4 and each control valve 11, so that manual control over each control switch 4 and each control valve 11 is realized; meanwhile, a control mode change-over switch 18, a control mode change-over switch 19 and a flood prevention level change-over switch 20 are further arranged on the manual control panel 16, wherein the control mode change-over switch 18 is used for changing over between an automatic control mode and a manual control mode, the control mode change-over switch 19 is used for changing over between a conventional control mode and a flood prevention control mode and between other disaster control modes, and the flood prevention level change-over switch 20 is used for changing over different flood prevention levels.
Referring to fig. 4, the working process of the power supply system of the present invention is as follows:
meanwhile, for convenience of description, two sets of standby power supply devices are named as a first standby power supply device and a second standby power supply device respectively, control switches of the first standby power supply device are named as Q11 and Q12 respectively, and a first voltage detection device, a second voltage detection device and a third voltage detection device in the first standby power supply device are named as DY11, MDY1 and DY12 respectively; its control valve is named DDF 1;
the control switches of the second standby power supply device are named as Q21 and Q22 respectively, and the first voltage detection device, the second voltage detection device and the third voltage detection device of the second standby power supply device are named as DY21, MDY2 and DY22 respectively; its control valve is named DDF 2;
the communication circuit breaker which is connected with the first standby power supply device and the second standby power supply device is named as Q3;
for the manual operation mode of the whole set of system, the operation is completely carried out by the staff in real time according to the information feedback, and the description is omitted again; it should be noted that the related manual operation device is equipped with a corresponding locking logic control device according to the related industry specification to prevent the misoperation in the manual state.
When the control mode of the whole system is an automatic mode and is a conventional control mode, the following working processes exist:
1) the device power-on debugging process comprises:
firstly, Q11, Q12, Q3, Q21 and Q22 are all set to be in a brake-off state, meanwhile, the PLC is electrified, and when DY11 detects voltage and time T1(100ms) is delayed, the PLC controls Q11 to be switched on;
after the time T2 (taking 300ms) for delaying, the PLC judges whether the Q11 is switched on or not through related control signals, and simultaneously the MDY1 detects voltage and judges that the Q1 is switched on successfully; the first standby power supply device is successfully conducted; meanwhile, the second standby power supply device is turned on by the same method, and Q12, Q3 and Q22 are in a switching-off state after the second standby power supply device is turned on.
2) In the operation process of the equipment, the first standby power supply device breaks down:
when DY11 detects no voltage, MDY1 also detects no voltage, the fault of the first standby power supply line is judged, and the PLC sends a tripping command to Q11; after T2 is delayed, Q1 is judged to be tripped successfully according to the tripping signal;
a closing command is sent to the Q3, after a time delay of T2, the Q3 is judged to be successfully closed according to the control signal, simultaneously, the MDY1 detects the voltage, and at the moment, the second standby power supply device replaces the first standby power supply device to supply power to the dam;
when the first standby power supply is cleared, DY11 detects voltage, the PLC controls Q3 to trip at the moment, after T2 is delayed, MDY1 detects no voltage through corresponding position signals, and Q3 is judged to trip successfully; meanwhile, the PLC controls Q1 to be switched on, after the time delay T2, a corresponding switch-on position signal is received, simultaneously, the MDY1 detects the voltage, and at the moment, the system is recovered to a normal working state.
The conversion process aiming at the second standby power supply failure and the line restoration process after the repair are the same as the above processes, and the difference is only the conversion of the corresponding control component and the voltage detection device.
3) No. one standby power supply device and No. two standby power supply devices simultaneously break down
If DY11 and MDY1 detect no voltage at the same time, the standby power supply device No. one is judged to be powered off, and if DY21 and MDY2 detect no voltage at the same time, the standby power supply device No. two is judged to be powered off;
after the PLC makes the judgment, the PLC commands Q11, Q3 and Q21 to trip at the same time, and according to the corresponding position signals and the MDY1 and MDY2 detect no voltage signals, the PLC judges that the trip is successful;
the diesel generator of the first standby power supply device of the PLC box sends a starting command, DY12 detects a normal voltage signal, the PLC commands Q12 to switch on at the moment, corresponding switch-on position signals are received after time delay of time T2, meanwhile, MDY1 detects a normal voltage signal, and Q12 is successfully switched on; commanding Q3 to switch on, after time delay of time length T2, receiving corresponding switch-on position signals, judging that the switch-on of Q3 is normal when MDY2 detects normal voltage signals, and realizing power supply of the two groups of power supply systems through a first standby power supply device;
4) the line fault cannot be discharged in a short time, and two diesel generator sets are required to alternately operate (the example of switching from a diesel engine No. 1 to a diesel engine No. 2 is taken here as an example for explanation):
when a diesel oil level low-limit alarm signal of a running diesel generator or a fault signal of other diesel generators reporting that the diesel generator needs to be shut down is received, the PLC confirms that the diesel engine needs to be switched, the PLC sends a command for starting the diesel generator in the second standby power system, after DY22 detects a normal voltage signal and delays T2, the PLC sends a diesel engine shutdown command of the first standby power system, and commands Q12 and Q3 to trip, and when corresponding position signals are received and simultaneously MDY1 and MDY2 detect no-voltage signals, the PLC judges that the trip is successful;
at the moment, a PLC (programmable logic controller) commands Q22 to close, a Q3 closing command is sent out after a corresponding position signal is received and simultaneously an MDY3 detects a voltage signal, when a corresponding closing signal is detected and simultaneously an MDY1 detects a normal voltage signal, the conversion process is judged to be finished, at the moment, power is supplied by a diesel generator of a second standby power supply system, a standby group is cooled within 10min after a diesel engine of a first standby power supply device stops rotating, then a control valve and oil supply equipment in an oil depot are started to realize fuel oil filling, and a corresponding control valve is closed after filling is finished;
when the conversion processes of the diesel generators are opposite, the conversion processes are the same, and only the corresponding detection devices are correspondingly switched.
After the line returns to normal, the regulation process is as follows: firstly DY11 detects a voltage signal, the PLC commands Q12, Q3 and Q22 to trip at the same time and sends a shutdown command to two diesel generators, when a corresponding position signal is received and MDY1 detects a no-voltage signal, the trip is judged to be successful, meanwhile, Q11 is commanded to be switched on, when a corresponding position signal is detected and MDY1 detects a normal voltage signal, the first standby power supply device is judged to be successfully switched;
then, a command Q21 is switched on, a corresponding position signal is detected, meanwhile, a normal voltage signal is detected by the MDY2, the second standby power supply device is successfully switched, at the moment, the two lines recover to a normal working state, one of the two lines can be reserved or selected according to actual requirements, and the other line is closed;
5) when encountering earthquake disaster
The emergency management center issues corresponding emergency control commands through the network and the communication satellite, immediately starts the diesel engine set of the first standby power supply device after receiving the corresponding commands, and carries out corresponding processing according to the processing mode to connect the diesel generator into the power supply network when the connecting line of the corresponding power supply network fails;
and when the emergency control state releasing control command is received and the normal power supply of the power supply network is judged, the PLC closes the diesel generator.
6) Flood disaster
Firstly, an emergency command center judges which level of flood emergency control instruction is started according to received flood information, then sends a corresponding control instruction through a network or a communication satellite, and a PLC immediately starts a diesel unit of a first standby power supply device after receiving the corresponding control instruction and carries out corresponding processing according to the processing mode when a corresponding power supply network connecting line fails to connect a diesel generator into a power supply network;
and when the emergency control state releasing control command is received and the normal power supply of the power supply network is judged, the PLC closes the diesel generator.
It should be noted that when the control instruction is switched to the highest flood prevention level and the program judges that all the diesel generators do not work, the PLC immediately starts the diesel engine, sends an alarm signal to the emergency management center according to a certain time interval, and opens the control gate through the dam control system to discharge flood.
Compared with the prior art, the invention ensures the stable power supply of the dam power supply network through two groups of standby power supply devices, ensures the normal operation of the dam, has simple structure, simplifies the equipment and complexity of the whole system, reduces the cost of the equipment, effectively improves the reliability and stability of the equipment, and ensures that the device can play the role of application when the power grid fails.
Claims (8)
1. An intelligent standby power supply system for a hydropower station dam comprises a controller (1) and two groups of standby power supply devices with the same structure, wherein the two standby power supply devices are mutually communicated through a communication circuit breaker (2); the standby power supply device comprises a transformer (3), wherein the input end of the transformer (3) is communicated with a power supply network, and the output end of the transformer is communicated with a load; the method is characterized in that: the output end of the transformer (3) is also provided with a control switch (4) for controlling the on-off state of the circuit, and two sides of the control switch (4) are respectively provided with a first voltage detection device (5) and a second voltage detection device (6); the standby power supply device also comprises a diesel generator (7) connected with the transformer (3) in parallel, and the output end of the diesel generator (7) is provided with a control switch (4) and a third voltage detection device (8); the interconnection breaker (2), the first voltage detection device (5), the second voltage detection device (6), the third voltage detection device (8), the diesel generator (7) and the control switches (4) are respectively connected with the controller (1).
2. The intelligent backup power supply system for the hydroelectric power station dam as claimed in claim 1, wherein: the oil inlet end of the diesel generator (7) is communicated with a diesel reservoir (10) through an oil delivery pipe (9), a control valve (11) is further arranged on the oil delivery pipe (9), and the control valve (11) is connected with the controller (1).
3. The intelligent backup power supply system for the hydroelectric power station dam as claimed in claim 1, wherein: the controller (1) comprises a dual-power module (12) and a PLC (programmable logic controller) (13) which are connected with each other, and the PLC (13) is connected with a touch screen (14) through an RS485 bus.
4. The intelligent backup power supply system for the hydroelectric power station dam as claimed in claim 1, wherein: the controller (1) further comprises a network connection port and a satellite communication module (15), and the satellite communication module (15) is connected with the PLC (13) respectively.
5. The intelligent backup power supply system for the hydroelectric power station dam as claimed in claim 2, wherein: the controller (1) further comprises a manual control panel (16), and a plurality of manual control switches (17) which are in one-to-one correspondence with the control switches (4) and the control valves (11) are arranged on the manual control panel (16).
6. The intelligent backup power supply system for the hydroelectric power station dam as claimed in claim 5, wherein: the manual control panel (16) is further provided with a control mode change-over switch (18), a control mode change-over switch (19) and a flood prevention level change-over switch (20).
7. The intelligent backup power supply system for the hydroelectric power station dam as claimed in claim 1, wherein: the first voltage detection device (5), the second voltage detection device (6) and the third voltage detection device (8) are all voltage measurement sensors.
8. The intelligent backup power supply system for the hydroelectric power station dam as claimed in claim 1, wherein: the control switch (4) is an incoming line breaker.
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| Application Number | Priority Date | Filing Date | Title |
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| CN202011300327.2A CN112311086A (en) | 2020-11-19 | 2020-11-19 | Intelligent standby power supply system for hydropower station dam |
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| CN202011300327.2A CN112311086A (en) | 2020-11-19 | 2020-11-19 | Intelligent standby power supply system for hydropower station dam |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN115498756A (en) * | 2022-11-17 | 2022-12-20 | 国网（天津）综合能源服务有限公司 | Dual-power switching device and method for power supply system |
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2020
- 2020-11-19 CN CN202011300327.2A patent/CN112311086A/en active Pending
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN115498756A (en) * | 2022-11-17 | 2022-12-20 | 国网（天津）综合能源服务有限公司 | Dual-power switching device and method for power supply system |
| CN115498756B (en) * | 2022-11-17 | 2023-02-21 | 国网（天津）综合能源服务有限公司 | Dual-power switching device and method for power supply system |
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