CN210460941U - Intelligent speed regulator control system of hydropower station water turbine - Google Patents
Intelligent speed regulator control system of hydropower station water turbine Download PDFInfo
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- CN210460941U CN210460941U CN201921121562.6U CN201921121562U CN210460941U CN 210460941 U CN210460941 U CN 210460941U CN 201921121562 U CN201921121562 U CN 201921121562U CN 210460941 U CN210460941 U CN 210460941U
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Abstract
The utility model provides an intelligent speed regulator control system of a hydraulic turbine in a hydropower station, which belongs to the technical field of hydroelectric power generation, and comprises a hydraulic control module, a main control module and a peripheral equipment module; one end of the main control module is connected with the hydraulic control module, and the other end of the main control module is connected with the peripheral equipment module; the hydraulic control module comprises a hydraulic control unit and a power source unit; one end of the hydraulic control unit is connected with the main control module, and the other end of the hydraulic control unit is connected with the power source unit; the main control module comprises a power supply and monitoring control unit, an MCU unit, an input and output unit, an LED display unit, a sensor measuring unit, a machine frequency and network frequency measuring unit, a communication interface unit and a high-power driving output unit. The utility model has the advantages that: the functions of the hydraulic speed regulator system are enriched, and the expansion capability of the hydraulic speed regulator system is improved.
Description
Technical Field
The utility model relates to a hydroelectric power generation technical field indicates a power station hydraulic turbine intelligence speed regulator control system very much.
Background
In the automatic system of the hydropower station which is unattended and unattended with little person, the speed regulator system of the water turbine plays an important role in ensuring the safe and reliable operation of the whole automatic system of the hydropower station. Along with the gradual improvement of the unattended technology of the automation system of the hydropower station, the requirements on the stability and the safety of a hydraulic turbine speed regulator system of the hydropower station are higher and higher, and the hydraulic turbine speed regulator system is gradually changed from a direct current motor speed regulator to a hydraulic speed regulator system.
Due to the harsh requirements of unattended hydropower stations on the stability and safety of the system, most of the hydraulic speed regulator systems adopting a PLC control core at present have the following defects: traditional hydraulic pressure speed regulator system adopts mitsubishi PLC as main control unit, and the inside integrated MCU function singleness of mitsubishi PLC, and expansion interface is few, leads to the module upgrading in later stage very inconvenient.
Disclosure of Invention
The to-be-solved technical problem of the utility model lies in providing a power station hydraulic turbine intelligence speed regulator control system, realizes richening the function of hydraulic pressure speed regulator system, promotes the expansion capacity of hydraulic pressure speed regulator system.
The utility model discloses a realize like this: an intelligent speed regulator control system of a hydraulic turbine of a hydropower station comprises a hydraulic control module, a main control module and a peripheral equipment module; one end of the main control module is connected with the hydraulic control module, and the other end of the main control module is connected with the peripheral equipment module;
the hydraulic control module comprises a hydraulic control unit and a power source unit; one end of the hydraulic control unit is connected with the main control module, and the other end of the hydraulic control unit is connected with the power source unit;
the main control module comprises a power supply and monitoring control unit, an MCU unit, an input and output unit, an LED display unit, a sensor measuring unit, a machine frequency and network frequency measuring unit, a communication interface unit and a high-power driving output unit; one end of the input/output unit, the LED display unit, the sensor measuring unit, the machine frequency and network frequency measuring unit, the communication interface unit and the high-power driving output unit is connected with the power supply and monitoring control unit, and the other end of the input/output unit is connected with the MCU unit; and the power supply and monitoring control unit is connected with the MCU.
Furthermore, the peripheral equipment module at least comprises a 24V standby lead-acid storage battery, an alternating current and direct current power supply monitoring relay, an external machine end frequency measurement PT, an external network end frequency measurement PT, a direct current power supply switching power supply, an alternating current switching power supply and a battery charging power supply;
the 24V standby lead-acid storage battery, the alternating current and direct current power supply monitoring relay, the external machine end frequency measurement PT, the external network end frequency measurement PT, the direct current power supply switching power supply, the alternating current switching power supply and the battery charging power supply are respectively connected with the main control module.
Furthermore, the hydraulic control unit comprises a spray needle electromagnetic valve, a diverter electromagnetic valve, a spray needle hydraulic control lock assembly, a diverter hydraulic control lock assembly, a spray needle throttle valve assembly, a diverter throttle valve assembly, a spray needle servomotor and a diverter servomotor;
one end of the spray needle hydraulic control lock assembly is connected with the spray needle electromagnetic valve, and the other end of the spray needle hydraulic control lock assembly is connected with the spray needle throttle valve assembly; the spray needle throttle valve component is connected with the spray needle servomotor; one end of the hydraulic control lock assembly of the deflector is connected with the electromagnetic valve of the deflector, and the other end of the hydraulic control lock assembly of the deflector is connected with the throttle valve assembly of the deflector; the deflector throttling valve assembly is connected with the deflector servomotor; the spray needle electromagnetic valve is connected with the power source unit and the main control module; the diverter electromagnetic valve is connected with the power source unit and the main control module;
the power source unit comprises an oil supply ball valve, a pressure sensor, an electric contact pressure gauge, a pressure sensor overhaul valve, an electric contact pressure gauge overhaul valve, an energy accumulator, a pressure release valve, a one-way valve, an oil outlet filter, an overflow valve, a gear pump, a motor and an oil inlet filter;
one end of the pressure sensor maintenance valve is connected with the pressure sensor, and the other end of the pressure sensor maintenance valve is connected with the one-way valve; one end of the electric contact pressure gauge maintenance valve is connected with the electric contact pressure gauge, and the other end of the electric contact pressure gauge maintenance valve is connected with the one-way valve; one end of the oil supply ball valve is connected with the spray needle electromagnetic valve and the deflector electromagnetic valve, and the other end of the oil supply ball valve is connected with the pressure sensor overhaul valve, the electric contact pressure gauge overhaul valve, the one-way valve, the energy accumulator and the pressure release valve; one end of the oil outlet filter is connected with the one-way valve, and the other end of the oil outlet filter is connected with the overflow valve and the gear pump; the gear pump is respectively connected with the oil inlet filter and the motor.
Furthermore, the power supply and monitoring control unit comprises an external power supply interface circuit, a direct current surge overvoltage protection circuit, a battery overvoltage protection circuit, a low power consumption control circuit, a DC/DC isolation power supply circuit and a power supply internal power supply interface circuit;
the input end of the direct current surge overvoltage protection circuit is connected with an external power supply interface circuit, and the output end of the direct current surge overvoltage protection circuit is connected with the low-power consumption control circuit; the input end of the battery overvoltage protection circuit is connected with an external power supply interface circuit, and the output end of the battery overvoltage protection circuit is connected with the low-power-consumption control circuit and a power supply internal power supply interface circuit; the input end of the DC/DC isolation power supply circuit is connected with the low-power consumption control circuit, and the output end of the DC/DC isolation power supply circuit is connected with the power supply interface circuit inside the power supply; one end of the power supply interface circuit inside the power supply is connected with the low-power consumption control circuit, and the other end of the power supply interface circuit is connected with the input/output unit, the LED display unit, the sensor measuring unit, the machine frequency and network frequency measuring unit, the communication interface unit, the high-power drive output unit and the MCU unit.
Furthermore, the MCU unit comprises an MCU of which the model is STM32F407, a memory, a watchdog circuit, a backup power supply circuit and an MCU interface circuit;
the memory, the watchdog circuit, the backup power supply circuit and the MCU interface circuit are respectively connected with the MCU;
the input and output unit, the LED display unit, the sensor measuring unit, the machine frequency and network frequency measuring unit, the communication interface unit, the high-power driving output unit, the power supply and monitoring control unit and the peripheral equipment module are respectively connected with the MCU interface circuit.
Furthermore, the open-in and open-out unit comprises an internal open-in and open-out interface circuit, a filter power supply circuit, a 12-path open-out circuit with optical coupling isolation, a 23-path open-in circuit with optical coupling isolation and an external open-in and open-out interface circuit;
the 12-path circuit is connected with the internal open-in open-out interface circuit by using an input end with an optical coupling isolation open-out circuit, and an output end is connected with the external open-in open-out interface circuit; the 23 paths of circuits are connected with an external open-in open-out interface circuit by an input end with an optical coupling isolation circuit, and an output end is connected with the internal open-in open-out interface circuit; the input end of the filter power supply circuit is connected with the internal input and output interface circuit, and the output end of the filter power supply circuit is connected with 12 paths of isolating and output circuits with optical couplers and 23 paths of isolating and output circuits with optical couplers; the internal open-in open-out interface circuit is respectively connected with the power supply, the monitoring control unit and the MCU.
Further, the LED display unit includes a power supply and filter circuit, a display chip with a model of CH452, a display internal interface circuit, a 16-way open indicating circuit, a 32-way open indicating circuit, an 8-way abnormal state indicating circuit, an 8-way operating state indicating circuit, and an 8-way other state indicating circuit;
the input ends of the 16-path open-out indicating circuit, the 32-path open-in indicating circuit, the 8-path abnormal state indicating circuit, the 8-path running state indicating circuit and the 8-path other state indicating circuit are connected with the power supply and the filter circuit, and the other ends of the 16-path open-out indicating circuit, the 32-path open-in indicating circuit, the 8-path abnormal state indicating circuit and the 8-path other state indicating; the power supply and the filter circuit are connected with the display chip; and the power supply and filter circuit, the display chip, the power supply and monitoring control unit and the MCU are respectively connected with the display internal interface circuit.
Furthermore, the sensor measuring unit comprises a sensor collecting interface circuit, a pressure isolating collecting circuit, a battery isolating collecting circuit, a guide vane opening isolating collecting circuit, a primary frequency modulation isolating collecting circuit, a standby voltage isolating collecting circuit, a collecting chip with the model number of AD7606 and a collecting internal interface circuit;
the input ends of the pressure isolation acquisition circuit, the battery isolation acquisition circuit, the guide vane opening isolation acquisition circuit, the primary frequency modulation isolation acquisition circuit and the standby voltage isolation acquisition circuit are connected with the sensor acquisition interface circuit, and the output ends of the pressure isolation acquisition circuit, the battery isolation acquisition circuit, the guide vane opening isolation acquisition circuit and the standby voltage isolation acquisition circuit are connected with the acquisition chip; one end of the acquisition internal interface circuit is connected with the acquisition chip, and the other end of the acquisition internal interface circuit is connected with the power supply, the monitoring control unit and the MCU unit.
Furthermore, the machine frequency and network frequency measuring unit comprises an external frequency input interface circuit, a machine end voltage zero-crossing detection isolation circuit, a frequency internal interface circuit, a DC/DC power supply circuit and a network end voltage zero-crossing detection isolation circuit;
the external frequency input interface circuit is respectively connected with the machine end voltage zero-crossing detection isolation circuit and the network end voltage zero-crossing detection isolation circuit; the DC/DC power supply circuit is respectively connected with the machine end voltage zero-crossing detection isolation circuit and the network end voltage zero-crossing detection isolation circuit; one end of the frequency internal interface circuit is connected with the DC/DC power supply circuit, and the other end of the frequency internal interface circuit is connected with the power supply and monitoring control unit and the MCU unit.
Furthermore, the communication interface unit comprises an external communication interface circuit, an internal communication interface circuit, a first RS485 communication circuit with isolation, a second RS485 communication circuit with isolation, a third RS485 communication circuit with isolation and a CAN communication circuit with isolation;
one end of the first RS485 communication circuit with isolation, the second RS485 communication circuit with isolation, the third RS485 communication circuit with isolation and the communication circuit with isolation CAN is connected with an external communication interface circuit, and the other end of the communication circuit with isolation CAN is connected with the internal communication interface circuit; the internal communication interface circuit is respectively connected with the power supply, the monitoring control unit and the MCU;
the high-power driving output unit comprises an external high-power input circuit, a spray needle switch isolation driving circuit, a deflector switch isolation driving circuit and an internal power interface circuit;
the input ends of the spray needle switch isolation driving circuit and the deflector switch isolation driving circuit are connected with an external high-power input circuit, and the output ends of the spray needle switch isolation driving circuit and the deflector switch isolation driving circuit are connected with the internal power interface circuit; the internal power interface circuit is respectively connected with the power supply, the monitoring control unit and the MCU; and the external high-power input circuit is connected with the hydraulic control unit.
The utility model has the advantages that:
1. the main control module integrates a power supply and monitoring control unit, an MCU unit, an input/output unit, an LED display unit, a sensor measuring unit, a machine frequency and network frequency measuring unit, a communication interface unit and a high-power driving output unit; integrating a 24V standby lead-acid storage battery, an alternating current and direct current power supply monitoring relay, an external machine end frequency measurement PT, an external network end frequency measurement PT, a direct current power supply switching power supply, an alternating current switching power supply and a battery charging power supply through a peripheral equipment module; the functions of the hydraulic speed regulator system are greatly enriched, so that the hydraulic speed regulator system can meet the requirements of various scenes; the method is suitable for active regulation of the frequency of the non-grid-connected state and the grid-connected state of the hydraulic turbine set of the small and medium hydropower station.
2. Through the MCU unit adopts the MCU that the model is STM32F407, and sets up MCU interface circuit for the extension equipment can directly pass through MCU interface circuit access system, very big promotion hydraulic governor system's expansion ability.
3. Through setting up pressure sensor and electric contact pressure gauge are each other for stand-by mode, very big improvement the speed governing precision of hydraulic turbine and the stability of system.
4. The traditional hydraulic speed regulator system adopts a single PLC control unit, the hardware resource of the single PLC control unit is limited, the function expansion is generally required, the function expansion needs to be expanded to corresponding function expansion modules, the cost of the function expansion modules is high, and particularly for special functions in the aspect of automation of hydropower stations, the PLC control unit cannot be realized or is difficult to realize, so that the cost of hardware upgrading and expansion is high; and this application adopts MCU unit, software modification is comparatively simple, and hardware resources is abundant, and has set up MCU interface circuit, and function extension is convenient, has reduced the cost of hardware upgrading and extension.
Drawings
The invention will be further described with reference to the following examples with reference to the accompanying drawings.
Fig. 1 is the circuit schematic block diagram of the utility model discloses a power station hydraulic turbine intelligence governor control system.
Fig. 2 is a schematic structural diagram of the hydraulic control module of the present invention.
Fig. 3 is a schematic circuit block diagram of the main control module of the present invention.
Fig. 4 is a schematic circuit block diagram of the power supply and monitoring control unit of the present invention.
Fig. 5 is a schematic circuit block diagram of the MCU unit of the present invention.
Fig. 6 is a schematic block diagram of the circuit of the input/output unit of the present invention.
Fig. 7 is a schematic circuit block diagram of the LED display unit of the present invention.
Fig. 8 is a schematic block circuit diagram of the sensor measuring unit of the present invention.
Fig. 9 is a schematic block diagram of the circuit of the frequency measurement unit of the present invention.
Fig. 10 is a schematic circuit block diagram of the communication interface unit of the present invention.
Fig. 11 is a schematic circuit block diagram of the high power driving output unit of the present invention.
Fig. 12 is a general schematic diagram of the present invention.
Description of the labeling:
the hydraulic control system comprises a hydraulic control unit 1, a power source unit 2, a spray needle electromagnetic valve 11, a diverter electromagnetic valve 12, a spray needle hydraulic control lock assembly 13, a diverter hydraulic control lock assembly 14, a spray needle throttling valve assembly 15, a diverter throttling valve assembly 16, a spray needle servomotor 17, a diverter servomotor 18, an oil supply ball valve 21, a pressure sensor 22, an electric contact pressure gauge 23, a pressure sensor overhaul valve 24, an electric contact pressure gauge overhaul valve 25, an energy accumulator 26, a pressure release valve 27, a check valve 28, an oil outlet filter 29, an overflow valve 30, a gear pump 31, an electric motor 32 and an oil inlet filter 33.
Detailed Description
Referring to fig. 1 to 12, a preferred embodiment of a control system for an intelligent speed regulator of a hydraulic turbine in a hydropower station of the present invention includes a hydraulic control module, a main control module, and a peripheral device module; one end of the main control module is connected with the hydraulic control module, and the other end of the main control module is connected with the peripheral equipment module;
the hydraulic control module comprises a hydraulic control unit and a power source unit; one end of the hydraulic control unit is connected with the main control module, and the other end of the hydraulic control unit is connected with the power source unit;
the main control module comprises a power supply and monitoring control unit, an MCU unit, an input and output unit, an LED display unit, a sensor measuring unit, a machine frequency and network frequency measuring unit, a communication interface unit and a high-power driving output unit; one end of the input/output unit, the LED display unit, the sensor measuring unit, the machine frequency and network frequency measuring unit, the communication interface unit and the high-power driving output unit is connected with the power supply and monitoring control unit, and the other end of the input/output unit is connected with the MCU unit; and the power supply and monitoring control unit is connected with the MCU.
The peripheral equipment module at least comprises a 24V standby lead-acid storage battery, an alternating current and direct current power supply monitoring relay, an external machine end frequency measurement PT, an external network end frequency measurement PT, a direct current power supply switching power supply, an alternating current switching power supply and a battery charging power supply;
the 24V standby lead-acid storage battery, the alternating current and direct current power supply monitoring relay, the external machine end frequency measurement PT, the external network end frequency measurement PT, the direct current power supply switching power supply, the alternating current switching power supply and the battery charging power supply are respectively connected with the main control module.
The main control module integrates a power supply and monitoring control unit, an MCU unit, an input/output unit, an LED display unit, a sensor measuring unit, a machine frequency and network frequency measuring unit, a communication interface unit and a high-power driving output unit; integrating a 24V standby lead-acid storage battery, an alternating current and direct current power supply monitoring relay, an external machine end frequency measurement PT, an external network end frequency measurement PT, a direct current power supply switching power supply, an alternating current switching power supply and a battery charging power supply through a peripheral equipment module; the functions of the hydraulic speed regulator system are greatly enriched, so that the hydraulic speed regulator system can meet the requirements of various scenes.
The hydraulic control unit 1 comprises a needle electromagnetic valve 11, a deflector electromagnetic valve 12, a needle hydraulic control lock assembly 13, a deflector hydraulic control lock assembly 14, a needle throttle valve assembly 15, a deflector throttle valve assembly 16, a needle servomotor 17 and a deflector servomotor 18;
one end of the spray needle hydraulic control lock assembly 13 is connected with the spray needle electromagnetic valve 11, and the other end of the spray needle hydraulic control lock assembly is connected with the spray needle throttle valve assembly 15; the spray needle throttle valve assembly 15 is connected with a spray needle servomotor 17; one end of the hydraulic control lock assembly 14 of the deflector is connected with the electromagnetic valve 12 of the deflector, and the other end is connected with the throttle valve assembly 16 of the deflector; the deflector throttling valve assembly 16 is connected with a deflector servomotor 18; the spray needle electromagnetic valve 11 is connected with the power source unit 2 and the main control module; the diverter electromagnetic valve 12 is connected with the power source unit 2 and the main control module;
the power source unit 2 comprises an oil supply ball valve 21, a pressure sensor 22, an electric contact pressure gauge 23, a pressure sensor overhaul valve 24, an electric contact pressure gauge overhaul valve 25, an energy accumulator 26, a pressure release valve 27, a one-way valve 28, an oil outlet filter 29, an overflow valve 30, a gear pump 31, a motor 32 and an oil inlet filter 33; the pressure sensor 22 and the electric contact pressure gauge 23 are arranged in a mutually standby mode, so that the speed regulation precision of the water turbine and the stability of a system are greatly improved; the gear pump 31 has a start-stop control function, and intelligent judgment is added to judge whether the gear pump 31 is in fault or not, a hydraulic control module health value, a hydraulic control module maintenance prompt, a hydraulic control module oil leakage judgment or not and an air bag inflation prompt of the energy accumulator 26; the inlet of the oil inlet filter 33 is immersed in the hydraulic oil level of the tank.
One end of the pressure sensor maintenance valve 24 is connected with the pressure sensor 22, and the other end is connected with the one-way valve 28; one end of the electric contact pressure gauge maintenance valve 25 is connected with the electric contact pressure gauge 23, and the other end is connected with the one-way valve 28; one end of the oil supply ball valve 21 is connected with the needle electromagnetic valve 11 and the deflector electromagnetic valve 12, and the other end is connected with the pressure sensor maintenance valve 24, the electric contact pressure gauge maintenance valve 25, the one-way valve 28, the energy accumulator 26 and the pressure release valve 27; one end of the oil outlet filter 29 is connected with the one-way valve 28, and the other end is connected with the overflow valve 30 and the gear pump 31; the gear pump 31 is connected to an oil inlet filter 33 and an electric motor 32.
The power supply and monitoring control unit comprises an external power supply interface circuit, a direct current surge overvoltage protection circuit, a battery overvoltage protection circuit, a low-power consumption control circuit, a DC/DC isolation power supply circuit and a power supply internal power supply interface circuit; the alternating current switch power supply, the direct current switch power supply and the external battery power supply are input through the external power supply interface circuit;
the input end of the direct current surge overvoltage protection circuit is connected with an external power supply interface circuit, and the output end of the direct current surge overvoltage protection circuit is connected with the low-power consumption control circuit; the input end of the battery overvoltage protection circuit is connected with an external power supply interface circuit, and the output end of the battery overvoltage protection circuit is connected with the low-power-consumption control circuit and a power supply internal power supply interface circuit; the input end of the DC/DC isolation power supply circuit is connected with the low-power consumption control circuit, and the output end of the DC/DC isolation power supply circuit is connected with the power supply interface circuit inside the power supply; one end of the power supply interface circuit inside the power supply is connected with the low-power consumption control circuit, and the other end of the power supply interface circuit is connected with the input/output unit, the LED display unit, the sensor measuring unit, the machine frequency and network frequency measuring unit, the communication interface unit, the high-power drive output unit and the MCU unit.
The MCU unit comprises an MCU of which the model is STM32F407, a memory, a watchdog circuit, a backup power supply circuit and an MCU interface circuit;
the memory, the watchdog circuit, the backup power supply circuit and the MCU interface circuit are respectively connected with the MCU;
the input and output unit, the LED display unit, the sensor measuring unit, the machine frequency and network frequency measuring unit, the communication interface unit, the high-power driving output unit, the power supply and monitoring control unit and the peripheral equipment module are respectively connected with the MCU interface circuit. Through the MCU unit adopts the MCU that the model is STM32F407, and sets up MCU interface circuit for the extension equipment can directly pass through MCU interface circuit access system, very big promotion hydraulic governor system's expansion ability.
The open-in and open-out unit comprises an internal open-in and open-out interface circuit, a filter power supply circuit, a 12-path isolating open-out circuit with an optical coupler, a 23-path isolating open-in circuit with an optical coupler and an external open-in and open-out interface circuit;
the 12-path circuit is connected with the internal open-in open-out interface circuit by using an input end with an optical coupling isolation open-out circuit, and an output end is connected with the external open-in open-out interface circuit; the 23 paths of circuits are connected with an external open-in open-out interface circuit by an input end with an optical coupling isolation circuit, and an output end is connected with the internal open-in open-out interface circuit; the input end of the filter power supply circuit is connected with the internal input and output interface circuit, and the output end of the filter power supply circuit is connected with 12 paths of isolating and output circuits with optical couplers and 23 paths of isolating and output circuits with optical couplers; the internal open-in open-out interface circuit is respectively connected with the power supply, the monitoring control unit and the MCU.
The LED display unit comprises a power supply and filter circuit, a display chip with the model number of CH452, a display internal interface circuit, a 16-path open indicating circuit, a 32-path open indicating circuit, an 8-path abnormal state indicating circuit, an 8-path running state indicating circuit and an 8-path other state indicating circuit;
the input ends of the 16-path open-out indicating circuit, the 32-path open-in indicating circuit, the 8-path abnormal state indicating circuit, the 8-path running state indicating circuit and the 8-path other state indicating circuit are connected with the power supply and the filter circuit, and the other ends of the 16-path open-out indicating circuit, the 32-path open-in indicating circuit, the 8-path abnormal state indicating circuit and the 8-path other state indicating; the power supply and the filter circuit are connected with the display chip; and the power supply and filter circuit, the display chip, the power supply and monitoring control unit and the MCU are respectively connected with the display internal interface circuit.
The sensor measuring unit comprises a sensor collecting interface circuit, a pressure isolating collecting circuit, a battery isolating collecting circuit, a guide vane opening isolating collecting circuit, a primary frequency modulation isolating collecting circuit, a standby voltage isolating collecting circuit, a collecting chip with the model number of AD7606 and a collecting internal interface circuit; the external pressure sensor, the battery voltage, the guide vane opening sensor, the primary frequency modulation correlation and the standby voltage are input to the acquisition chip through the sensor acquisition interface circuit;
the input ends of the pressure isolation acquisition circuit, the battery isolation acquisition circuit, the guide vane opening isolation acquisition circuit, the primary frequency modulation isolation acquisition circuit and the standby voltage isolation acquisition circuit are connected with the sensor acquisition interface circuit, and the output ends of the pressure isolation acquisition circuit, the battery isolation acquisition circuit, the guide vane opening isolation acquisition circuit and the standby voltage isolation acquisition circuit are connected with the acquisition chip; one end of the acquisition internal interface circuit is connected with the acquisition chip, and the other end of the acquisition internal interface circuit is connected with the power supply, the monitoring control unit and the MCU unit.
The machine frequency and network frequency measuring unit comprises an external frequency input interface circuit, a machine end voltage zero-crossing detection isolating circuit, a frequency internal interface circuit, a DC/DC power supply circuit and a network end voltage zero-crossing detection isolating circuit; an external machine end frequency measurement PT input and an external network end frequency measurement PT input are input into the machine end voltage zero-crossing detection isolation circuit and the network end voltage zero-crossing detection isolation circuit through the external frequency input interface circuit;
the external frequency input interface circuit is respectively connected with the machine end voltage zero-crossing detection isolation circuit and the network end voltage zero-crossing detection isolation circuit; the DC/DC power supply circuit is respectively connected with the machine end voltage zero-crossing detection isolation circuit and the network end voltage zero-crossing detection isolation circuit; one end of the frequency internal interface circuit is connected with the DC/DC power supply circuit, and the other end of the frequency internal interface circuit is connected with the power supply and monitoring control unit and the MCU unit.
The communication interface unit comprises an external communication interface circuit, an internal communication interface circuit, a first RS485 communication circuit with isolation, a second RS485 communication circuit with isolation, a third RS485 communication circuit with isolation and a CAN communication circuit with isolation; the remote LCU control cabinet, the touch screen control terminal, the primary frequency modulation and the multi-speed regulator are connected through an external communication interface circuit;
one end of the first RS485 communication circuit with isolation, the second RS485 communication circuit with isolation, the third RS485 communication circuit with isolation and the communication circuit with isolation CAN is connected with an external communication interface circuit, and the other end of the communication circuit with isolation CAN is connected with the internal communication interface circuit; the internal communication interface circuit is respectively connected with the power supply, the monitoring control unit and the MCU;
the high-power driving output unit comprises an external high-power input circuit, a spray needle switch isolation driving circuit, a deflector switch isolation driving circuit and an internal power interface circuit;
the input ends of the spray needle switch isolation driving circuit and the deflector switch isolation driving circuit are connected with an external high-power input circuit, and the output ends of the spray needle switch isolation driving circuit and the deflector switch isolation driving circuit are connected with the internal power interface circuit; the internal power interface circuit is respectively connected with the power supply, the monitoring control unit and the MCU; the external high-power input circuit is connected with a needle electromagnetic valve 11 and a deflector electromagnetic valve 12 of the hydraulic control unit.
The utility model discloses the theory of operation:
The main control module checks the pressure of the power source in real time through the pressure value returned by the pressure sensor 22, starts the gear pump 31 when the pressure is lower than a set value, and stops the gear pump 31 when the pressure is higher than the set value. When the pressure is lower than the accident low oil pressure set value or higher than the high oil pressure set value, the main control module transmits the data to the remote LCU control cabinet through the communication interface unit. The master control module records the starting times of the gear pump 31 every ten minutes, and the starting times are used as the conditions for judging whether the gear pump 31 is started frequently and also as the conditions for judging whether the hydraulic control module leaks oil and judging the health degree of the hydraulic control module. The main control module judges the stop time of each gear pump 31, and when the continuous working time of the gear pump 31 is longer than a set value, the main control module sends a stop operation command to prevent the gear pump 31 from being damaged due to the fact that the gear pump 31 works for a long time to drive the oil temperature to rise.
The main control module can judge the gas pressure value of the air bag of the energy accumulator 26, and when the air bag pressure is lower than a set value, the main control module gives an alarm and informs a remote LCU control cabinet to prompt that the air bag of the energy accumulator 26 needs to be inflated.
When the main control module receives a command of opening the spray needle electromagnetic valve 11 sent by a remote LCU control cabinet, the main control module outputs the opening and closing amount of the spray needle electromagnetic valve 11, an opening coil of the spray needle electromagnetic valve 11 is electrified, and pressure oil enters the spray needle hydraulic control lock assembly 13 through the spray needle electromagnetic valve 11 and opens the spray needle throttle valve assembly 15. At this time, because there is the needle hydraulic lock assembly 13, the flow of the pressure oil is not throttled, and thus enters the open cavity of the needle servomotor 17, the pressure oil pushes the piston of the needle servomotor 27 to move in the open direction, and the main control module receives the opening feedback in real time. When the cavity-closing hydraulic oil is throttled by the spray needle throttle valve assembly 15, the throttled hydraulic oil flows back to the oil tank; the operation process of the needle solenoid valve 11 can be closed in the same way.
The nozzle needle servomotor 17 is connected with a water turbine, the opening or closing of the nozzle needle servomotor 17 can control the water yield of a nozzle of the water turbine so as to adjust the frequency of a generator of the water turbine, and the water turbine can control the work of the water turbine after the water turbine is connected to the grid; the action time of opening or closing the deflector servomotor 18 is 1 second, the deflector servomotor can be quickly put in and withdrawn, and the problem that the frequency is too high due to sudden disconnection of the hydraulic generator set under full load is solved.
When the main control module receives a starting command sent by a remote LCU control cabinet, the main control module carries out 2-second filtering on the starting command, and after the filtering condition is met, the main control module outputs a command of opening the deflector electromagnetic valve 12 and sends a command of opening the spray needle electromagnetic valve 11. At the moment, the spray needle electromagnetic valve 11 is opened, and the water column is sprayed to the rotating wheel of the water turbine to push the hydraulic generator to rotate. When the frequency of the hydraulic generator is lower than 50Hz, the main control module sends a command of opening the spray needle electromagnetic valve 11, when the frequency of the hydraulic generator is higher than 50Hz, the main control module sends a command of closing the spray needle electromagnetic valve 11, the main control module is added with PID control to better adjust the frequency of the hydraulic generator set, and the step mainly acts as the synchronous condition that the hydraulic generator set can be merged into a power grid for power generation. After the hydroelectric generating set is merged into the power grid, the remote LCU control cabinet sends out an active power increasing command, the main control module receives the command and sends out a command of opening the spray needle electromagnetic valve 11, and meanwhile, the opening analog quantity of the existing spray needle electromagnetic valve 11 is transmitted back. The remote LCU control cabinet sends out an active power reduction command, the main control module receives the command and sends out a command of closing the spray needle electromagnetic valve 11. The remote LCU control cabinet sends a shutdown command, the main control module receives and sends a command of closing the spray needle electromagnetic valve 11 and sends a switch-on command of the deflector electromagnetic valve 12, and when the opening degree of the spray needle electromagnetic valve 11 sent back by the main control module acquisition sensor is fully closed, the main control module enters a shutdown standby state to wait for receiving the next command.
To sum up, the utility model has the advantages that:
1. the main control module integrates a power supply and monitoring control unit, an MCU unit, an input/output unit, an LED display unit, a sensor measuring unit, a machine frequency and network frequency measuring unit, a communication interface unit and a high-power driving output unit; integrating a 24V standby lead-acid storage battery, an alternating current and direct current power supply monitoring relay, an external machine end frequency measurement PT, an external network end frequency measurement PT, a direct current power supply switching power supply, an alternating current switching power supply and a battery charging power supply through a peripheral equipment module; the functions of the hydraulic speed regulator system are greatly enriched, so that the hydraulic speed regulator system can meet the requirements of various scenes; the method is suitable for active regulation of the frequency of the non-grid-connected state and the grid-connected state of the hydraulic turbine set of the small and medium hydropower station.
2. Through the MCU unit adopts the MCU that the model is STM32F407, and sets up MCU interface circuit for the extension equipment can directly pass through MCU interface circuit access system, very big promotion hydraulic governor system's expansion ability.
3. Through setting up pressure sensor and electric contact pressure gauge are each other for stand-by mode, very big improvement the speed governing precision of hydraulic turbine and the stability of system.
4. The traditional hydraulic speed regulator system adopts a single PLC control unit, the hardware resource of the single PLC control unit is limited, the function expansion is generally required, the function expansion needs to be expanded to corresponding function expansion modules, the cost of the function expansion modules is high, and particularly for special functions in the aspect of automation of hydropower stations, the PLC control unit cannot be realized or is difficult to realize, so that the cost of hardware upgrading and expansion is high; and this application adopts MCU unit, software modification is comparatively simple, and hardware resources is abundant, and has set up MCU interface circuit, and function extension is convenient, has reduced the cost of hardware upgrading and extension.
Although specific embodiments of the present invention have been described, it will be understood by those skilled in the art that the specific embodiments described are illustrative only and are not limiting upon the scope of the invention, and that equivalent modifications and variations can be made by those skilled in the art without departing from the spirit of the invention, which is to be limited only by the claims appended hereto.
Claims (10)
1. The utility model provides a power station hydraulic turbine intelligence speed regulator control system which characterized in that: comprises a hydraulic control module, a main control module and a peripheral equipment module; one end of the main control module is connected with the hydraulic control module, and the other end of the main control module is connected with the peripheral equipment module;
the hydraulic control module comprises a hydraulic control unit and a power source unit; one end of the hydraulic control unit is connected with the main control module, and the other end of the hydraulic control unit is connected with the power source unit;
the main control module comprises a power supply and monitoring control unit, an MCU unit, an input and output unit, an LED display unit, a sensor measuring unit, a machine frequency and network frequency measuring unit, a communication interface unit and a high-power driving output unit; one end of the input/output unit, the LED display unit, the sensor measuring unit, the machine frequency and network frequency measuring unit, the communication interface unit and the high-power driving output unit is connected with the power supply and monitoring control unit, and the other end of the input/output unit is connected with the MCU unit; and the power supply and monitoring control unit is connected with the MCU.
2. The intelligent governor control system for hydraulic turbines in hydropower stations as defined in claim 1, wherein: the peripheral equipment module at least comprises a 24V standby lead-acid storage battery, an alternating current and direct current power supply monitoring relay, an external machine end frequency measurement PT, an external network end frequency measurement PT, a direct current power supply switching power supply, an alternating current switching power supply and a battery charging power supply;
the 24V standby lead-acid storage battery, the alternating current and direct current power supply monitoring relay, the external machine end frequency measurement PT, the external network end frequency measurement PT, the direct current power supply switching power supply, the alternating current switching power supply and the battery charging power supply are respectively connected with the main control module.
3. The intelligent governor control system for hydraulic turbines in hydropower stations as defined in claim 1, wherein: the hydraulic control unit comprises a spray needle electromagnetic valve, a deflector electromagnetic valve, a spray needle hydraulic control lock assembly, a deflector hydraulic control lock assembly, a spray needle throttle valve assembly, a deflector throttle valve assembly, a spray needle servomotor and a deflector servomotor;
one end of the spray needle hydraulic control lock assembly is connected with the spray needle electromagnetic valve, and the other end of the spray needle hydraulic control lock assembly is connected with the spray needle throttle valve assembly; the spray needle throttle valve component is connected with the spray needle servomotor; one end of the hydraulic control lock assembly of the deflector is connected with the electromagnetic valve of the deflector, and the other end of the hydraulic control lock assembly of the deflector is connected with the throttle valve assembly of the deflector; the deflector throttling valve assembly is connected with the deflector servomotor; the spray needle electromagnetic valve is connected with the power source unit and the main control module; the diverter electromagnetic valve is connected with the power source unit and the main control module;
the power source unit comprises an oil supply ball valve, a pressure sensor, an electric contact pressure gauge, a pressure sensor overhaul valve, an electric contact pressure gauge overhaul valve, an energy accumulator, a pressure release valve, a one-way valve, an oil outlet filter, an overflow valve, a gear pump, a motor and an oil inlet filter;
one end of the pressure sensor maintenance valve is connected with the pressure sensor, and the other end of the pressure sensor maintenance valve is connected with the one-way valve; one end of the electric contact pressure gauge maintenance valve is connected with the electric contact pressure gauge, and the other end of the electric contact pressure gauge maintenance valve is connected with the one-way valve; one end of the oil supply ball valve is connected with the spray needle electromagnetic valve and the deflector electromagnetic valve, and the other end of the oil supply ball valve is connected with the pressure sensor overhaul valve, the electric contact pressure gauge overhaul valve, the one-way valve, the energy accumulator and the pressure release valve; one end of the oil outlet filter is connected with the one-way valve, and the other end of the oil outlet filter is connected with the overflow valve and the gear pump; the gear pump is respectively connected with the oil inlet filter and the motor.
4. The intelligent governor control system for hydraulic turbines in hydropower stations as defined in claim 1, wherein: the power supply and monitoring control unit comprises an external power supply interface circuit, a direct current surge overvoltage protection circuit, a battery overvoltage protection circuit, a low-power consumption control circuit, a DC/DC isolation power supply circuit and a power supply internal power supply interface circuit;
the input end of the direct current surge overvoltage protection circuit is connected with an external power supply interface circuit, and the output end of the direct current surge overvoltage protection circuit is connected with the low-power consumption control circuit; the input end of the battery overvoltage protection circuit is connected with an external power supply interface circuit, and the output end of the battery overvoltage protection circuit is connected with the low-power-consumption control circuit and a power supply internal power supply interface circuit; the input end of the DC/DC isolation power supply circuit is connected with the low-power consumption control circuit, and the output end of the DC/DC isolation power supply circuit is connected with the power supply interface circuit inside the power supply; one end of the power supply interface circuit inside the power supply is connected with the low-power consumption control circuit, and the other end of the power supply interface circuit is connected with the input/output unit, the LED display unit, the sensor measuring unit, the machine frequency and network frequency measuring unit, the communication interface unit, the high-power drive output unit and the MCU unit.
5. The intelligent governor control system for hydraulic turbines in hydropower stations as defined in claim 1, wherein: the MCU unit comprises an MCU of which the model is STM32F407, a memory, a watchdog circuit, a backup power supply circuit and an MCU interface circuit;
the memory, the watchdog circuit, the backup power supply circuit and the MCU interface circuit are respectively connected with the MCU;
the input and output unit, the LED display unit, the sensor measuring unit, the machine frequency and network frequency measuring unit, the communication interface unit, the high-power driving output unit, the power supply and monitoring control unit and the peripheral equipment module are respectively connected with the MCU interface circuit.
6. The intelligent governor control system for hydraulic turbines in hydropower stations as defined in claim 1, wherein: the open-in and open-out unit comprises an internal open-in and open-out interface circuit, a filter power supply circuit, a 12-path isolating open-out circuit with an optical coupler, a 23-path isolating open-in circuit with an optical coupler and an external open-in and open-out interface circuit;
the 12-path circuit is connected with the internal open-in open-out interface circuit by using an input end with an optical coupling isolation open-out circuit, and an output end is connected with the external open-in open-out interface circuit; the 23 paths of circuits are connected with an external open-in open-out interface circuit by an input end with an optical coupling isolation circuit, and an output end is connected with the internal open-in open-out interface circuit; the input end of the filter power supply circuit is connected with the internal input and output interface circuit, and the output end of the filter power supply circuit is connected with 12 paths of isolating and output circuits with optical couplers and 23 paths of isolating and output circuits with optical couplers; the internal open-in open-out interface circuit is respectively connected with the power supply, the monitoring control unit and the MCU.
7. The intelligent governor control system for hydraulic turbines in hydropower stations as defined in claim 1, wherein: the LED display unit comprises a power supply and filter circuit, a display chip with the model number of CH452, a display internal interface circuit, a 16-path open indicating circuit, a 32-path open indicating circuit, an 8-path abnormal state indicating circuit, an 8-path running state indicating circuit and an 8-path other state indicating circuit;
the input ends of the 16-path open-out indicating circuit, the 32-path open-in indicating circuit, the 8-path abnormal state indicating circuit, the 8-path running state indicating circuit and the 8-path other state indicating circuit are connected with the power supply and the filter circuit, and the other ends of the 16-path open-out indicating circuit, the 32-path open-in indicating circuit, the 8-path abnormal state indicating circuit and the 8-path other state indicating; the power supply and the filter circuit are connected with the display chip; and the power supply and filter circuit, the display chip, the power supply and monitoring control unit and the MCU are respectively connected with the display internal interface circuit.
8. The intelligent governor control system for hydraulic turbines in hydropower stations as defined in claim 1, wherein: the sensor measuring unit comprises a sensor collecting interface circuit, a pressure isolating collecting circuit, a battery isolating collecting circuit, a guide vane opening isolating collecting circuit, a primary frequency modulation isolating collecting circuit, a standby voltage isolating collecting circuit, a collecting chip with the model number of AD7606 and a collecting internal interface circuit;
the input ends of the pressure isolation acquisition circuit, the battery isolation acquisition circuit, the guide vane opening isolation acquisition circuit, the primary frequency modulation isolation acquisition circuit and the standby voltage isolation acquisition circuit are connected with the sensor acquisition interface circuit, and the output ends of the pressure isolation acquisition circuit, the battery isolation acquisition circuit, the guide vane opening isolation acquisition circuit and the standby voltage isolation acquisition circuit are connected with the acquisition chip; one end of the acquisition internal interface circuit is connected with the acquisition chip, and the other end of the acquisition internal interface circuit is connected with the power supply, the monitoring control unit and the MCU unit.
9. The intelligent governor control system for hydraulic turbines in hydropower stations as defined in claim 1, wherein: the machine frequency and network frequency measuring unit comprises an external frequency input interface circuit, a machine end voltage zero-crossing detection isolating circuit, a frequency internal interface circuit, a DC/DC power supply circuit and a network end voltage zero-crossing detection isolating circuit;
the external frequency input interface circuit is respectively connected with the machine end voltage zero-crossing detection isolation circuit and the network end voltage zero-crossing detection isolation circuit; the DC/DC power supply circuit is respectively connected with the machine end voltage zero-crossing detection isolation circuit and the network end voltage zero-crossing detection isolation circuit; one end of the frequency internal interface circuit is connected with the DC/DC power supply circuit, and the other end of the frequency internal interface circuit is connected with the power supply and monitoring control unit and the MCU unit.
10. The intelligent governor control system for hydraulic turbines in hydropower stations as defined in claim 1, wherein: the communication interface unit comprises an external communication interface circuit, an internal communication interface circuit, a first RS485 communication circuit with isolation, a second RS485 communication circuit with isolation, a third RS485 communication circuit with isolation and a CAN communication circuit with isolation;
one end of the first RS485 communication circuit with isolation, the second RS485 communication circuit with isolation, the third RS485 communication circuit with isolation and the communication circuit with isolation CAN is connected with an external communication interface circuit, and the other end of the communication circuit with isolation CAN is connected with the internal communication interface circuit; the internal communication interface circuit is respectively connected with the power supply, the monitoring control unit and the MCU;
the high-power driving output unit comprises an external high-power input circuit, a spray needle switch isolation driving circuit, a deflector switch isolation driving circuit and an internal power interface circuit;
the input ends of the spray needle switch isolation driving circuit and the deflector switch isolation driving circuit are connected with an external high-power input circuit, and the output ends of the spray needle switch isolation driving circuit and the deflector switch isolation driving circuit are connected with the internal power interface circuit; the internal power interface circuit is respectively connected with the power supply, the monitoring control unit and the MCU; and the external high-power input circuit is connected with the hydraulic control unit.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201921121562.6U CN210460941U (en) | 2019-07-17 | 2019-07-17 | Intelligent speed regulator control system of hydropower station water turbine |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201921121562.6U CN210460941U (en) | 2019-07-17 | 2019-07-17 | Intelligent speed regulator control system of hydropower station water turbine |
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| Publication Number | Publication Date |
|---|---|
| CN210460941U true CN210460941U (en) | 2020-05-05 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201921121562.6U Active CN210460941U (en) | 2019-07-17 | 2019-07-17 | Intelligent speed regulator control system of hydropower station water turbine |
Country Status (1)
| Country | Link |
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| CN (1) | CN210460941U (en) |
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2019
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