CN212135166U - Digital physical hybrid simulation system for hydropower station operation and maintenance skill training - Google Patents
Digital physical hybrid simulation system for hydropower station operation and maintenance skill training Download PDFInfo
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- CN212135166U CN212135166U CN202020810168.XU CN202020810168U CN212135166U CN 212135166 U CN212135166 U CN 212135166U CN 202020810168 U CN202020810168 U CN 202020810168U CN 212135166 U CN212135166 U CN 212135166U
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Abstract
The utility model discloses a digit physics hybrid simulation system for power station fortune dimension skill training, including emulation hydroelectric set, excitation control group, hydraulic turbine speed governing control group and computer monitoring group. The utility model provides a do not have the hydraulic turbine under the prerequisite as the prime mover, realized the emulation of hydraulic generator rotational speed control through the converter, and then realized the shut down of unit, no-load, the operating mode simulation of being incorporated into the power networks to and speed regulator and excitation system's conventional test under all kinds of operating modes. Additionally, the utility model discloses a combination of physical simulation and real-time digital hybrid simulation, on automatic device's such as hydroelectric set equipment and speed governing, excitation, control closed-loop control relation basis, reappeared hydroelectric power generation overall process, can simulate hydroelectric set all kinds of trouble, accident, provide directly perceived, safe, low-cost actual combat training environment, show the training condition who improves hydropower station operation and maintenance technical ability talent.
Description
Technical Field
The utility model relates to a hydraulic power plant production skill training technical field, in particular to digit physics hybrid simulation system for training of hydropower station operation and maintenance skill.
Background
As main equipment of a hydropower station, the water turbine generator set has high purchase value and long installation period, and is particularly important in a power system, and the development of related skill training in a real hydropower station working environment is greatly limited under the constraints of safety, economy and reliability. A special teaching power plant is built, a real hydroelectric generating set, auxiliary equipment and a hydropower station automatic device are utilized for teaching, an ideal training effect can be obtained, the investment is large, the construction period is long, the point selection is difficult, the position is often remote, and a certain contradiction exists between teaching and production tasks.
In recent years, the simulation of the hydroelectric generating set by utilizing a computer simulation technology is a trend, pure digital simulation can provide a human-computer interface which is the same as that of a real hydropower station operator station for a trainee, and a mathematical model built in a simulation server is utilized to simulate working condition conversion, load increase and decrease and accident handling, but the trainee cannot establish perceptual knowledge on the power generation process by only utilizing the digital simulation, and the detection, debugging and test training of a complete hydropower station automatic device cannot be provided.
Under the condition, a more common method is that a model is adopted for the training of host equipment, real secondary equipment is adopted for the training of an automatic device, and computer simulation is adopted for operation. In recent years, many hydraulic power plants simulate a water-turbine generator set to train by using a motor-generator which is simply linked with an automatic device, but cannot accurately reflect a closed-loop control relation between the water-turbine generator set and the automatic device, and only can provide a demonstration function and cognitive training.
SUMMERY OF THE UTILITY MODEL
The utility model provides a digit physics hybrid simulation system for power station fortune dimension skill training, for solving the problem of alternate segregation, lack of contact between hydraulic generator group digital system and the real system in the past.
The purpose of the utility model is realized through the following technical scheme:
a digital physical hybrid simulation system for hydropower station operation and maintenance skill training, comprising:
the simulation hydroelectric generating set comprises an asynchronous motor, a frequency converter, a synchronous generator and a fluted disc speed measuring device, wherein the asynchronous motor is connected with the synchronous generator through a connecting shaft flange, the fluted disc speed measuring device is arranged on the connecting shaft flange, and the frequency converter is connected with the asynchronous motor;
the excitation control group comprises a generator excitation regulator and a thyristor rectifying device, wherein the generator excitation regulator is connected with the thyristor rectifying device, and the thyristor rectifying device is connected with the synchronous generator;
the hydraulic turbine speed regulation control group comprises a hydraulic turbine speed regulator electrical part and a hydraulic turbine speed regulator mechanical hydraulic part, wherein the hydraulic turbine speed regulator electrical part is connected with the hydraulic turbine speed regulator mechanical hydraulic part, and the hydraulic turbine speed regulator electrical part is respectively connected with the fluted disc speed measuring device and the frequency converter;
and the computer monitoring group comprises a computer monitoring system local control unit, and the computer monitoring system local control unit is respectively connected with the fluted disc speed measuring device, the frequency converter, the generator excitation regulator and the hydraulic turbine speed regulator.
Further, synchronous generator is connected with mains supply system, emulation hydroelectric set still includes analog generator circuit breaker and the current transformer who sets up between synchronous generator and mains supply system, synchronous generator and mains supply system all are equipped with voltage transformer, synchronous generator be equipped with excitation transformer, excitation transformer is connected with generator excitation regulator.
Furthermore, a voltage transformer at the synchronous generator side, a voltage transformer and a current transformer at the mains supply system side are respectively connected with the excitation regulator of the generator, the electric part of the hydraulic turbine governor and the local control unit of the computer monitoring system.
Furthermore, the water turbine speed regulation control group comprises a servomotor and a servomotor displacement sensor, the servomotor is connected with the mechanical hydraulic part of the water turbine speed regulator, the servomotor is connected with the servomotor displacement sensor, and the servomotor displacement sensor is connected with the electrical part of the water turbine speed regulator.
Further, the computer monitoring group also comprises a computer monitoring system operator station, a simulation server and a network device, wherein the computer monitoring system operator station and the simulation server are both connected with the computer monitoring system local control unit through the network device.
Furthermore, the computer monitoring group also comprises an automatic quasi-synchronization device, the automatic quasi-synchronization device is connected with a local control unit of the computer monitoring system, and the automatic quasi-synchronization device is connected with the circuit breaker of the simulation generator.
Further, the automatic quasi-synchronization device is respectively connected with a voltage transformer at the side of the synchronous generator and a voltage transformer at the side of the mains supply system.
Further, the automatic quasi-synchronization device is respectively connected with the excitation regulator of the generator and the electric part of the governor of the water turbine.
The utility model has the advantages that:
the utility model discloses according to automatic device's such as simulation hydroelectric set and speed governing, excitation, control closed-loop control relation construction, solved not having the hydraulic turbine under the prerequisite as the prime mover, realized the emulation of hydraulic generator rotational speed control through the converter, and then realized shutting down, empty load, the operating mode simulation of being incorporated into the power networks of unit to and speed governing and excitation system's conventional test under all kinds of operating modes.
The utility model discloses a combination of physical simulation and real-time digital mixed simulation, on automatic device's such as hydroelectric set equipment and speed governing, excitation, control closed-loop control relation basis, reappeared hydroelectric power generation overall process, can simulate hydroelectric set all kinds of trouble, accident, provide directly perceived, safe, low-cost actual combat training environment, show the training condition who improves power station fortune dimension technical ability talent.
Drawings
Fig. 1 is the utility model provides a pair of a digit physics hybrid simulation system structure sketch map for power station operation and maintenance skill training.
In the figure, 101-asynchronous motor, 102-frequency converter, 111-synchronous generator, 112-generator analog breaker, 121-fluted disc speed measuring device, 122-voltage transformer, 123-current transformer, 201-generator excitation regulator, 202-thyristor rectifier, 203-excitation transformer, 211-hydraulic governor electrical part, 212-hydraulic governor mechanical hydraulic part, 213-servomotor, 214-servomotor displacement sensor, 221-automatic quasi-synchronization device, 231-computer monitoring system local control unit, 311-computer monitoring system operator station, 301-simulation server, 321-network equipment.
Detailed Description
The technical solution of the present invention will be described clearly and completely with reference to the following embodiments, and it should be understood that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. Based on the embodiments in the present invention, all other embodiments obtained by those skilled in the art without creative efforts belong to the protection scope of the present invention.
The utility model discloses reflect hydroelectric generation process more accurately, realize with the same hydroelectric set start of true power station, the operation of being incorporated into the power networks, increase and decrease load, shut down the operation, simulate all kinds of trouble, the accident of hydroelectric set, overhaul and provide directly perceived, safe, low-cost actual combat training environment with the operation skill talent training for power station automatics.
Referring to fig. 1, the utility model provides a technical scheme:
a digital physical hybrid simulation system for hydropower station operation and maintenance skill training, comprising:
the simulation hydroelectric generating set comprises an asynchronous motor 101, a frequency converter 102, a synchronous generator 111 and a fluted disc speed measuring device 121, wherein the asynchronous motor 101 is connected with the synchronous generator 111 through a connecting shaft flange, the fluted disc speed measuring device 121 is arranged on the connecting shaft flange, and the frequency converter 102 is connected with the asynchronous motor 101;
a field control group comprising a generator field regulator 201 and a thyristor rectifier device 202, the generator field regulator 201 being connected to the thyristor rectifier device 202, the thyristor rectifier device 202 being connected to the synchronous generator 111;
the hydraulic turbine speed regulation control group comprises a hydraulic turbine governor electrical part 211 and a hydraulic turbine governor mechanical hydraulic part 212, the hydraulic turbine governor electrical part 211 is connected with the hydraulic turbine governor mechanical hydraulic part 212, and the hydraulic turbine governor electrical part 211 is respectively connected with the fluted disc speed measuring device 121 and the frequency converter 102;
and the computer monitoring group comprises a computer monitoring system local control unit 231, and the computer monitoring system local control unit 231 is respectively connected with the fluted disc speed measuring device 121, the frequency converter 102, the generator excitation regulator 201 and the hydraulic turbine governor electrical part 211.
In some embodiments, the synchronous generator 111 is connected to a mains supply system, the simulated water turbine generator set further includes an analog generator circuit breaker 112 and a current transformer 123 which are arranged between the synchronous generator 111 and the mains supply system, the synchronous generator 111 and the mains supply system are both provided with a voltage transformer 122, the synchronous generator 111 is provided with an excitation transformer 203, the excitation transformer 203 is connected to a generator excitation regulator 201, the generator excitation regulator 201 measures the voltage of the excitation transformer 203, and then controls the conduction angle of a thyristor in a thyristor rectifier 202 to increase or decrease the excitation current, so that the generator terminal voltage operates at a stable level; the voltage transformer 122 on the synchronous generator side, the voltage transformer 122 on the utility power system side and the current transformer 123 are respectively connected with the excitation regulator 201 of the generator, the electric part 211 of the hydraulic turbine governor and the local control unit 231 of the computer monitoring system.
In some embodiments, the hydro turbine speed regulation control group includes a servomotor 213 and a servomotor displacement sensor 214, the servomotor 213 is connected to the hydro turbine governor mechanical hydraulic part 212, the servomotor 213 is connected to the servomotor displacement sensor 214, and the servomotor displacement sensor 214 is connected to the hydro turbine governor electrical part 211.
In some embodiments, the computer monitoring group further comprises a computer monitoring system operator station 311, a simulation server 301, and a network device 321, both the computer monitoring system operator station 311 and the simulation server 301 controlling the unit 231 in-situ with the computer monitoring system through the network device 321.
In some embodiments, the computer monitoring group further comprises an automatic quasi-synchronization device 221, the automatic quasi-synchronization device 221 being connected with the computer monitoring system local control unit 231, the automatic quasi-synchronization device 221 being connected with the analog generator breaker 112; the automatic quasi-synchronization device 221 is respectively connected with the voltage transformer 122 on the synchronous generator side and the voltage transformer 122 on the commercial power system side; the automatic quasi-synchronization device 221 is respectively connected with the excitation regulator 201 of the generator and the electric part 211 of the hydraulic turbine governor.
The frequency variation of the frequency converter 102 simulates the guide vane opening. The fluted disc speed measuring device 121 is responsible for measuring the rotating speed and feeding back to the computer monitoring group and the water turbine speed regulation control group. On the premise of meeting the starting-up condition, the monitoring upper computer sends a starting-up command to the computer monitoring system local control unit 231, and the computer monitoring system local control unit 231 sends the starting-up command to the speed regulator electrical part 211 and the generator excitation regulator 201. The speed regulator electrical part 211 outputs a 0-20V voltage signal to control the frequency output of the frequency converter after receiving a starting command, and simulates the water flow of a water turbine; the asynchronous motor 101 rotates according to the frequency output by the frequency converter 102 to drive the synchronous generator 111 to rotate, and the rotation speed signal is fed back to the electric part 211 of the speed regulator through the fluted disc speed measuring device 121 to form closed-loop control, so that the unit is controlled to operate at a stable rotation speed. When the rotating speed of the synchronous generator 111 reaches more than 95%, the excitation regulator 201 sends out an excitation initiating command to control the conduction angle of the controllable silicon in the thyristor rectifying device 202, so as to increase the excitation current and enable the generator terminal voltage to operate at a stable level. When the voltage, the frequency and the phase meet the conditions of synchronous grid connection, the automatic quasi-synchronous device 221 sends a closing signal to control the generator analog circuit breaker 112 to close and connect the grid, so that the grid-connected power generation of the generator is realized.
Operating mode 1 (start, stop and speed regulation): the hydraulic governor electrical part 211 compares the received on/off command (given rotating speed) of the computer monitoring system local control unit 231 with the rotating speed signal fed back by the fluted disc speed measuring device 121; or the 'guide vane opening degree' signal fed back by the displacement transmitter of the servomotor 213 is compared with the 'guide vane opening degree' which is built in and is related to the unit rotating speed n. And outputting an electric analog quantity signal according to the comparison result, wherein one path of the electric analog quantity signal controls a mechanical hydraulic part 212 of the water turbine speed regulator to change the displacement of a servomotor 213, and the other path of the electric analog quantity signal controls a frequency converter 102 to change the rotating speed of the asynchronous motor 101. Because the incidence relation between the 'guide vane opening degree' and the set rotating speed n is established in the hydraulic turbine speed regulator electrical part 211, the hydraulic turbine speed regulator electrical part 211 realizes the functions of regulating the simulated set rotating speed and starting and stopping through the opening degree setting.
Operating mode 2 (active regulation): the electric part 211 of the hydraulic turbine governor compares the received load increasing and decreasing instructions of the local control unit 231 of the computer monitoring system with the 'guide vane opening' signal fed back by the displacement transducer of the servomotor 213 and the 'guide vane opening' which is built in and related to the power of the unit, one path of the output electric analog quantity signal controls the mechanical hydraulic part 212 of the hydraulic turbine governor to change the displacement of the servomotor 213, and the other path controls the frequency converter 102 to change the output power of the asynchronous motor 101. Because the electrical part 211 of the hydraulic turbine governor establishes the incidence relation between the guide vane opening degree and the power of the unit, the electrical part 211 of the hydraulic turbine governor realizes the function of regulating the power of the simulated unit through the opening degree setting.
In the above working mode 1 and working mode 2, the parameters of the digital frequency converter 102 of the motor are adjusted through the rotating speed signal n fed back by the fluted disc speed measuring device 121, and the simulated hydroelectric generating set can simulate the real hydroelectric generating set to start and stop, and provide the conditions required by the related test of the automatic device of the hydropower station under various disturbance conditions and the torque and rotating speed change rules in the large fluctuation and small fluctuation processes.
Operating mode 3 (voltage regulation and reactive regulation): the computer monitoring system local control unit 231 issues a voltage setting or a reactive power setting to the generator excitation regulator 201, and the generator excitation regulator 201 determines the output current of the thyristor rectifier device 202, namely the rotor current of the synchronous generator 111 according to the measured values and the set values of the voltage transformer 122 and the current transformer 123, so that the purpose of regulating the terminal voltage or the reactive power is achieved.
Working mode 4 (automatic quasi-synchronous grid connection): the automatic quasi-synchronization device 221 issues rotating speed increasing and decreasing instructions to the speed regulator, issues voltage increasing and decreasing instructions to the generator excitation regulator 201, and issues a closing instruction to the generator outlet circuit breaker 112 when generator slip (angular frequency) obtained by comparing measured values of the voltage transformer 122 at the generator end and the mains system side meets the quasi-synchronization parallel condition, so that the simulation water-turbine generator set is parallel to the mains system, and the training condition of the simulation unit grid-connected test is realized.
The foregoing is illustrative of the preferred embodiments of the present invention, and it is to be understood that the invention is not limited to the precise forms disclosed herein, and that various other combinations, modifications, and environments may be resorted to, falling within the scope of the invention as defined by the appended claims. But that modifications and variations may be effected by those skilled in the art without departing from the spirit and scope of the invention, which is to be limited only by the claims appended hereto.
Claims (8)
1. A digital physical hybrid simulation system for hydropower station operation and maintenance skill training, comprising:
the simulation hydroelectric generating set comprises an asynchronous motor (101), a frequency converter (102), a synchronous generator (111) and a fluted disc speed measuring device (121), wherein the asynchronous motor (101) is connected with the synchronous generator (111) through a connecting shaft flange, the fluted disc speed measuring device (121) is arranged on the connecting shaft flange, and the frequency converter (102) is connected with the asynchronous motor (101);
a field control group comprising a generator field regulator (201) and a thyristor rectifier device (202), the generator field regulator (201) being connected to the thyristor rectifier device (202), the thyristor rectifier device (202) being connected to the synchronous generator (111);
the hydraulic turbine speed regulation control group comprises a hydraulic turbine governor electrical part (211) and a hydraulic turbine governor mechanical hydraulic part (212), the hydraulic turbine governor electrical part (211) is connected with the hydraulic turbine governor mechanical hydraulic part (212), and the hydraulic turbine governor electrical part (211) is respectively connected with the fluted disc speed measuring device (121) and the frequency converter (102);
and the computer monitoring group comprises a computer monitoring system local control unit (231), and the computer monitoring system local control unit (231) is respectively connected with the fluted disc speed measuring device (121), the frequency converter (102), the generator excitation regulator (201) and the hydraulic turbine governor electrical part (211).
2. The digital physical hybrid simulation system for hydropower station operation and maintenance skill training as claimed in claim 1, wherein: synchronous generator (111) is connected with the utility power system, emulation hydroelectric set is still including setting up simulation generator circuit breaker (112) and current transformer (123) between synchronous generator (111) and utility power system, synchronous generator (111) and utility power system all are equipped with voltage transformer (122), synchronous generator (111) be equipped with excitation transformer (203), excitation transformer (203) are connected with generator excitation regulator (201).
3. The digital physical hybrid simulation system for hydropower station operation and maintenance skill training as claimed in claim 2, wherein: and the voltage transformer (122) at the synchronous generator side, the voltage transformer (122) and the current transformer (123) at the commercial power system side are respectively connected with the excitation regulator (201) of the generator, the electric part (211) of the hydraulic turbine governor and the local control unit (231) of the computer monitoring system.
4. The digital physical hybrid simulation system for hydropower station operation and maintenance skill training as claimed in claim 2, wherein: the hydraulic turbine speed regulation control group comprises a servomotor (213) and a servomotor displacement sensor (214), the servomotor (213) is connected with a hydraulic part (212) of the hydraulic turbine governor, the servomotor (213) is connected with the servomotor displacement sensor (214), and the servomotor displacement sensor (214) is connected with an electric part (211) of the hydraulic turbine governor.
5. The digital physical hybrid simulation system for hydropower station operation and maintenance skill training as claimed in claim 3, wherein: the computer monitoring group further comprises a computer monitoring system operator station (311), a simulation server (301) and a network device (321), wherein the computer monitoring system operator station (311) and the simulation server (301) are connected with a computer monitoring system local control unit (231) through the network device (321).
6. The digital physical hybrid simulation system for hydropower station operation and maintenance skill training as claimed in claim 5, wherein: the computer monitoring group further comprises an automatic quasi-synchronization device (221), the automatic quasi-synchronization device (221) is connected with a computer monitoring system local control unit (231), and the automatic quasi-synchronization device (221) is connected with the simulation generator breaker (112).
7. The digital physical hybrid simulation system for hydropower station operation and maintenance skill training as claimed in claim 6, wherein: and the automatic quasi-synchronization device (221) is respectively connected with a voltage transformer (122) at the synchronous generator side and a voltage transformer (122) at the commercial power system side.
8. The digital physical hybrid simulation system for hydropower station operation and maintenance skill training as claimed in claim 6, wherein: the automatic quasi-synchronization device (221) is respectively connected with the excitation regulator (201) of the generator and the electric part (211) of the hydraulic turbine governor.
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| Application Number | Priority Date | Filing Date | Title |
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| CN202020810168.XU CN212135166U (en) | 2020-05-15 | 2020-05-15 | Digital physical hybrid simulation system for hydropower station operation and maintenance skill training |
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| CN202020810168.XU CN212135166U (en) | 2020-05-15 | 2020-05-15 | Digital physical hybrid simulation system for hydropower station operation and maintenance skill training |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113178118A (en) * | 2021-04-26 | 2021-07-27 | 中国能源建设集团广东省电力设计研究院有限公司 | Gas turbine starts grid-connected system based on movable mould emulation |
-
2020
- 2020-05-15 CN CN202020810168.XU patent/CN212135166U/en not_active Expired - Fee Related
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113178118A (en) * | 2021-04-26 | 2021-07-27 | 中国能源建设集团广东省电力设计研究院有限公司 | Gas turbine starts grid-connected system based on movable mould emulation |
| CN113178118B (en) * | 2021-04-26 | 2023-02-17 | 中国能源建设集团广东省电力设计研究院有限公司 | Gas turbine starts grid-connected system based on movable mould emulation |
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