CN220101423U - Speed regulating device of generator set - Google Patents
Speed regulating device of generator set Download PDFInfo
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- CN220101423U CN220101423U CN202320902623.2U CN202320902623U CN220101423U CN 220101423 U CN220101423 U CN 220101423U CN 202320902623 U CN202320902623 U CN 202320902623U CN 220101423 U CN220101423 U CN 220101423U
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- generator set
- conversion circuit
- speed
- regulation control
- multiplexer
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Abstract
The utility model discloses a generator set speed regulating device, which comprises: the two sensors of each group are respectively arranged in front of the trash rack at the flow channel water inlet of the generator set and at the outlet of the draft tube of the generator set; a multi-path acquisition device; the speed regulation control device comprises a speed regulator and a PLC; the water level sensors are respectively connected with the input ends of the multi-channel acquisition device, and the output ends of the multi-channel acquisition device are electrically connected with the PLCs in the speed regulation control devices through the RS485 bus; the PLC in each speed regulation control device is electrically connected with the speed regulator, and the speed regulator in each speed regulation control device is in control connection with a group of generator sets. The device improves the automation control level of the power plant, reduces the labor intensity of operators, and prevents misoperation accidents possibly caused by misoperation of the operators; the efficiency of unit operation has been improved, the power plant income has been increased.
Description
Technical Field
The utility model relates to the technical field of hydroelectric generating set speed regulation, in particular to a generator set speed regulating device.
Background
The radial hydropower station of river bed uses bulb tubular machine set as main material, and features small capacity, low water head and about 10m of maximum water head variation range. In recent years, as the water-light complementation is carried out at the upstream of the river channel, the change frequency of the river basin flow is increased, the flow change is irregular, the running water head of the generator set is changed frequently, and as the opening degree of the guide blades of the generator set and the water head have a certain corresponding relation, if the speed regulator can not collect the water head change in time, the water turbine can not run in the optimal range, thereby reducing the running efficiency of the water turbine. Therefore, the water head is an important parameter affecting the control performance of the speed regulator and the safe operation of the unit.
The traditional generator set speed regulation control is finished by manually changing the speed regulator for a long time, timeliness cannot be met, and meanwhile, the danger of manual misoperation and the labor intensity of operation staff are increased.
Disclosure of Invention
Aiming at the problems in the prior art, the utility model provides a generator set speed regulating device, which comprises:
the two sensors of each group are respectively arranged in front of the trash rack at the flow channel water inlet of the generator set and at the outlet of the draft tube of the generator set;
a multi-path acquisition device;
the speed regulation control device comprises a speed regulator and a PLC;
the water level sensors are respectively connected with the input ends of the multi-channel acquisition device, and the output ends of the multi-channel acquisition device are electrically connected with the PLCs in the speed regulation control devices through the RS485 bus; the PLC in each speed regulation control device is electrically connected with the speed regulator, and the speed regulator in each speed regulation control device is in control connection with a group of generator sets.
Preferably, the multi-path acquisition device comprises: a multiplexer; a current-voltage conversion circuit; an analog-to-digital conversion circuit; a microcontroller; an RS485 interface circuit; a switching power supply;
the water level sensors are respectively connected with the input ends of the multiplexers; the output end of the multiplexer is connected with the input end of the current-voltage conversion circuit, and the output end of the current-voltage conversion circuit is connected with the input end of the analog-to-digital conversion circuit; the output end of the analog-to-digital conversion circuit is connected with the microcontroller, and the multiplexer is connected with the microcontroller; the output end of the microcontroller is connected with the RS485 interface circuit.
Preferably, the multi-path acquisition device further comprises a DC-DC isolation power supply and an optical coupling isolation circuit; the multiplexer is respectively connected with the input ends of the microcontroller and the current-voltage conversion circuit through the optocoupler isolation circuit; the output end of the switching power supply is connected with the power end of the microcontroller through a DC-DC isolation power supply.
Preferably, the multiplexer adopts an analog-to-digital conversion chip with a model of MINI MCR-SL-MUX-V8-FLK analog-to-digital conversion circuit and adopts a bit analog-to-digital conversion chip.
Preferably, the input end of the multiplexer is electrically connected with the water level sensors, and the speed regulation control device is provided with four groups which are respectively connected with the four groups of generator sets in a control way.
Compared with the prior art, the utility model has the following beneficial effects:
the device performs data acquisition by selecting channels in a time-sharing way through the multiplexer, so that the subsequent circuit resources are saved, and the data precision is ensured by adopting a 12bit analog-digital conversion chip; the device realizes the regulation and control of the four groups of generator sets, improves the automatic control level of the power plant, reduces the labor intensity of operators, and prevents misoperation accidents possibly caused by misoperation of the operators; the efficiency of unit operation has been improved, the power plant income has been increased.
Drawings
FIG. 1 is a schematic diagram of a speed governor of a generator set according to the present utility model;
FIG. 2 is a schematic diagram of the circuit connections of a multi-channel acquisition device in a generator set speed regulating device according to the present utility model;
in the figure: the water level sensor-1, the multi-channel acquisition device-2, the speed regulation control device-3, the generator set-4, the multiplexer-21, the optocoupler isolation circuit-22, the RS485 interface circuit-23, the microcontroller-24, the analog-to-digital conversion circuit-25, the current-voltage conversion circuit-26, the DC-DC isolation power supply-27, the switching power supply-28, the speed regulator-31 and the PLC-32.
Detailed Description
The drawings in the embodiments of the present utility model will be combined; the technical scheme in the embodiment of the utility model is clearly and completely described:
as shown in fig. 1-2, in one embodiment of the present utility model, a generator set governor device includes:
the two water level sensors 1 are in a group, and the two sensors of each group are respectively arranged in front of the trash rack of the flow channel water inlet of the generator set 4 and at the outlet of the draft tube of the generator set 4;
the multipath acquisition device 2 is used for acquiring the output of each water level sensor 1;
the speed regulation control means 3 includes a speed regulator 31 and a PLC32 for regulating the operation of the generator set in an optimal range.
The water level sensors 1 are respectively connected with the input ends of the multi-channel acquisition device 2, and the output ends of the multi-channel acquisition device 2 are electrically connected with the PLC32 in the speed regulation control devices 3 through an RS485 bus; the PLC32 and the speed regulator 31 in each speed regulation control device 3 are electrically connected, and the speed regulator 31 in each speed regulation control device 3 is in control connection with a group of generator sets 4.
Working principle:
the water levels of the front part of the trash rack at the water inlet of the runner and the outlet of the draft tube of the multiple groups of generator sets 4 are respectively monitored by the multiple groups of water level sensors 1; the water level signals are acquired and output to the corresponding speed regulation control device 3 through the multipath acquisition device 2, the water level of the outlet of the draft tube is subtracted before the drain grating of the flow channel water inlet by the internal PLC32, a water level difference value is obtained and sent to the speed regulator 31, and the speed regulator 31 controls the hydroelectric generating set to operate in an optimal range according to the water level difference value, so that the operation efficiency of the hydroelectric generating set is improved.
In one embodiment of the present utility model, the multi-channel acquisition device 2 includes:
a multiplexer 21 for time-division acquisition of the output signals of the multiple water level sensor 1;
a current-voltage conversion circuit 26 (I/V conversion circuit) for converting the 4-20mA current signal outputted from the water level sensor 1 into a 0-5V voltage signal;
an analog-to-digital conversion circuit 25 for converting the 0-5V voltage signal output from the I/V conversion circuit into a digital value;
the microcontroller 24 sends the digital quantity signal output by the analog-to-digital conversion circuit 25 from the RS485 interface circuit 23 to the PLC32 in the corresponding speed regulation control device 3 in a communication mode of an RS485 bus;
a switching power supply 28 for supplying power to the internal components of the multi-path acquisition device 2;
wherein, the water level sensors 1 are respectively connected with the input end of the multiplexer 21; the output end of the multiplexer 21 is connected with the input end of the current-voltage conversion circuit 26, and the output end of the current-voltage conversion circuit 26 is connected with the input end of the analog-to-digital conversion circuit 25; the output end of the analog-to-digital conversion circuit 25 is connected with the microcontroller 24, the multiplexer 21 is connected with the microcontroller 24, the currently selected channel is sent to the microcontroller 24 through the multiplexer 21, and the microcontroller 24 collects and forwards the data on the corresponding channel.
In one embodiment of the present utility model, to improve the interference capability of the multi-channel acquisition device, the multi-channel acquisition device 2 further includes a DC-DC isolation power supply 27 and an optocoupler isolation circuit 22; the multiplexer 21 is connected with the input ends of the microcontroller 24 and the current-voltage conversion circuit 26 through the optocoupler isolation circuit 22 respectively; digital quantity and analog quantity isolation is realized; the output end of the switching power supply 28 is connected with the power end of the microcontroller 24 through the DC-DC isolation power supply 27 to supply power for the digital side of the optocoupler isolation circuit 22.
In one embodiment of the present utility model, the multiplexer 21 is a MINI MCR-SL-MUX-V8-FLK 16; wherein, as shown in fig. 2, three DO outputs may represent a selected channel of the current 8 channels, and the AO output outputs the data of the selected channel, and through, for example, three DO outputs 000, the first channel is selected, and the data input from the AN1 end is output to the AO end; a circuit for converting the 4-20mA current signal outputted from the water level sensor 1 into a 0-5V voltage signal via a current-voltage conversion circuit 26 (I/V conversion circuit); then the 0-5V voltage signal output by the I/V conversion circuit is converted into 12-bit digital quantity through the analog-to-digital conversion circuit 25; the microcontroller 24 then sends the data to the corresponding speed regulation control device 3 of the first group of generator sets through the RS485 bus;
the data acquisition is performed by selecting channels in a time-sharing manner through the multiplexer 21, so that the subsequent circuit resources are saved. The analog-digital conversion chip in the analog-digital conversion circuit 25 adopts an AD10200 and 12-bit analog-digital conversion chip, so that the data precision is ensured.
In one embodiment of the present utility model, the input end of the multiplexer 21 is electrically connected to 8 water level sensors, and the speed regulation control device 3 has four groups respectively connected to four groups of generator sets. The multi-channel collection device 2 is used for collecting water level values in front of inlet trash racks and at outlets of draft tubes of four groups of generator sets, and the four groups of generator sets 4 are regulated and controlled.
The foregoing description is only a preferred embodiment of the present utility model, but the scope of the present utility model is not limited thereto, and any person skilled in the art should be able to apply equivalents and modifications according to the technical scheme and the modified concept of the present utility model within the scope of the present utility model.
Claims (5)
1. The utility model provides a generating set speed adjusting device which characterized in that: comprising the following steps:
the two sensors of each group are respectively arranged in front of the trash rack at the flow channel water inlet of the generator set and at the outlet of the draft tube of the generator set;
a multi-path acquisition device;
the speed regulation control device comprises a speed regulator and a PLC;
the water level sensors are respectively connected with the input ends of the multi-channel acquisition device, and the output ends of the multi-channel acquisition device are electrically connected with the PLCs in the speed regulation control devices through the RS485 bus; the PLC in each speed regulation control device is electrically connected with the speed regulator, and the speed regulator in each speed regulation control device is in control connection with a group of generator sets.
2. The generator set speed regulator of claim 1, wherein: the multipath acquisition device comprises: a multiplexer; a current-voltage conversion circuit; an analog-to-digital conversion circuit; a microcontroller; an RS485 interface circuit; a switching power supply;
the water level sensors are respectively connected with the input ends of the multiplexers; the output end of the multiplexer is connected with the input end of the current-voltage conversion circuit, and the output end of the current-voltage conversion circuit is connected with the input end of the analog-to-digital conversion circuit; the output end of the analog-to-digital conversion circuit is connected with the microcontroller, and the multiplexer is connected with the microcontroller; the output end of the microcontroller is connected with the RS485 interface circuit.
3. The generator set speed governor of claim 2, wherein: the multipath acquisition device also comprises a DC-DC isolation power supply and an optical coupling isolation circuit; the multiplexer is respectively connected with the input ends of the microcontroller and the current-voltage conversion circuit through the optocoupler isolation circuit; the output end of the switching power supply is connected with the power end of the microcontroller through a DC-DC isolation power supply.
4. The generator set speed governor of claim 2, wherein: the multiplexer adopts an analog-to-digital conversion chip with the model of MINI MCR-SL-MUX-V8-FLK analog-to-digital conversion circuit and adopts a bit analog-to-digital conversion chip.
5. The generator set speed governor of claim 2, wherein: the input end of the multiplexer is electrically connected with 8 water level sensors, and four groups of speed regulation control devices are respectively connected with four groups of generator sets in a control manner.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202320902623.2U CN220101423U (en) | 2023-04-21 | 2023-04-21 | Speed regulating device of generator set |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202320902623.2U CN220101423U (en) | 2023-04-21 | 2023-04-21 | Speed regulating device of generator set |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN220101423U true CN220101423U (en) | 2023-11-28 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202320902623.2U Active CN220101423U (en) | 2023-04-21 | 2023-04-21 | Speed regulating device of generator set |
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| Country | Link |
|---|---|
| CN (1) | CN220101423U (en) |
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- 2023-04-21 CN CN202320902623.2U patent/CN220101423U/en active Active
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