CN110661290B - Low-water-head hydropower intelligent control system and method - Google Patents
Low-water-head hydropower intelligent control system and method Download PDFInfo
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- CN110661290B CN110661290B CN201910920858.2A CN201910920858A CN110661290B CN 110661290 B CN110661290 B CN 110661290B CN 201910920858 A CN201910920858 A CN 201910920858A CN 110661290 B CN110661290 B CN 110661290B
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F03—MACHINES OR ENGINES FOR LIQUIDS; WIND, SPRING, OR WEIGHT MOTORS; PRODUCING MECHANICAL POWER OR A REACTIVE PROPULSIVE THRUST, NOT OTHERWISE PROVIDED FOR
- F03B—MACHINES OR ENGINES FOR LIQUIDS
- F03B15/00—Controlling
- F03B15/02—Controlling by varying liquid flow
- F03B15/04—Controlling by varying liquid flow of turbines
- F03B15/06—Regulating, i.e. acting automatically
- F03B15/14—Regulating, i.e. acting automatically by or of water level
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02P—CONTROL OR REGULATION OF ELECTRIC MOTORS, ELECTRIC GENERATORS OR DYNAMO-ELECTRIC CONVERTERS; CONTROLLING TRANSFORMERS, REACTORS OR CHOKE COILS
- H02P9/00—Arrangements for controlling electric generators for the purpose of obtaining a desired output
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02P—CONTROL OR REGULATION OF ELECTRIC MOTORS, ELECTRIC GENERATORS OR DYNAMO-ELECTRIC CONVERTERS; CONTROLLING TRANSFORMERS, REACTORS OR CHOKE COILS
- H02P9/00—Arrangements for controlling electric generators for the purpose of obtaining a desired output
- H02P9/04—Control effected upon non-electric prime mover and dependent upon electric output value of the generator
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02P—CONTROL OR REGULATION OF ELECTRIC MOTORS, ELECTRIC GENERATORS OR DYNAMO-ELECTRIC CONVERTERS; CONTROLLING TRANSFORMERS, REACTORS OR CHOKE COILS
- H02P2101/00—Special adaptation of control arrangements for generators
- H02P2101/10—Special adaptation of control arrangements for generators for water-driven turbines
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E10/00—Energy generation through renewable energy sources
- Y02E10/20—Hydro energy
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- Chemical & Material Sciences (AREA)
- Combustion & Propulsion (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Control Of Eletrric Generators (AREA)
- Control Of Water Turbines (AREA)
Abstract
The invention discloses a low-water-head water conservancy power generation intelligent control system and a method, wherein the system comprises a water turbine, a permanent magnet generator, an inverter, a grid-connected cabinet, a detection module, a controller, an unloader and a water gate adjusting device; the system can control the water valve opening according to the data detected by the detection module so as to perform adaptive adjustment on the generated power, and the controller analyzes the data detected by the detection module in real time, controls the grid-connected cabinet to be disconnected in time when the power grid works abnormally and releases the electric energy generated by the permanent magnet generator through the unloader, so that the inverter is not burnt due to overvoltage or overload on the premise of ensuring that the hydropower station runs under the high-load condition, and the hydropower station can stably and continuously run.
Description
Technical Field
The invention relates to the technical field of hydropower station power generation configuration systems, in particular to a low-water-head hydropower intelligent control system and method.
Background
At present, with the development of economy, the number of hydroelectric power stations is increasing, and hydroelectric power generation mainly utilizes the water flow with potential energy at high positions such as rivers and lakes to flow to low positions, so that the potential energy contained in the water flow is converted into the kinetic energy of a water turbine, and then the water turbine is used as motive power to drive a generator to generate electric energy. However, the ecological environment is destroyed by the way of building a dam with high water potential to carry out hydroelectric power generation, so that a large area of land is submerged, and the problem is obvious. Therefore, the low water head power generation or river power generation mode in a natural state is gradually noticed, but the power generation mode has low water level, low potential energy of water and low rotation speed of a hydraulic driving water turbine, the number of poles of a generator is increased when the conventional generator is required to achieve synchronous speed power generation operation at the rotation speed, and the number of poles of the generator is increased, so that the volume of the generator becomes huge, the manufacturing cost of the generator is abnormally increased, the generator is difficult to adopt in engineering, and the generator is seriously unreasonable in economic aspect.
The application publication number is CN107276111A, the name of the invention patent application of the novel hydropower configuration system provides a novel method for solving low-head hydropower grid connection, namely, a permanent magnet generator is adopted as a generator, an inverter system is additionally arranged behind a water turbine permanent magnet generator, electric energy generated by the permanent magnet generator firstly enters an inverter, the permanent magnet generator can operate at a non-synchronous speed, the generated electric energy can be not 50HZ or 60HZ, the inverter converts the electric energy which is not 50Hz or 60HZ into the electric energy of 50HZ or 60HZ, and the grid connection condition is met and the electric energy is merged into a power grid. After engineering application for several years, the method has the problem of poor operation reliability of the hydropower station, and the main reason is that the existing inverter is not enough to meet the special requirements of hydroelectric power generation, protection and grid disconnection often occur, a water turbine runs in an overspeed mode, the generation voltage of a permanent magnet generator is rapidly increased, and then the problem of high-voltage breakdown of the inverter occurs, and meanwhile, when a power grid fails or power failure occurs suddenly, the inverter can also enter a grid disconnection state, and further the inverter is damaged.
Therefore, how to provide a low-head hydroelectric power generation system with high reliability, safety and stability is a problem that needs to be solved urgently by the technical personnel in the field.
Disclosure of Invention
In view of the above, the invention provides a low head hydroelectric generation intelligent control system and method, which realize adaptive regulation of generating power in a power station by additionally arranging a detection module and an unloader, matching with a water gate regulating device and a grid-connected cabinet, and can timely disconnect the grid-connected cabinet and timely release electric energy generated by a permanent magnet generator through the unloader when power supply of a power grid is abnormal, thereby avoiding the problem that an inverter is burnt out due to the rise of voltage of the permanent magnet generator.
In order to achieve the purpose, the invention adopts the following technical scheme:
in one aspect, the invention provides a low head hydroelectric intelligent control system, comprising: the system comprises a water turbine, a permanent magnet generator, an inverter, a grid-connected cabinet, a detection module, a controller, an unloader and a water gate adjusting device;
the water turbine is in transmission connection with the input end of the permanent magnet generator and is driven by water flow to rotate so as to drive the permanent magnet generator to operate;
the output end of the permanent magnet generator is electrically connected with the input end of the inverter, and the inverter carries out rectification and inversion processing on the electric energy output by the permanent magnet generator;
the output end of the inverter is electrically connected with the grid-connected cabinet, the grid-connected cabinet is connected to a power grid, and the grid-connected cabinet is used for timely disconnecting from the power grid when the power supply of the power grid is abnormal;
the output end of the inverter is also electrically connected with the unloader, and the unloader is used for timely releasing the electric energy processed by the inverter after the grid-connected cabinet is disconnected with a power grid;
the detection module is respectively electrically connected with the water turbine, the permanent magnet generator, the inverter and the grid-connected cabinet and is used for detecting a plurality of power generation related parameters in real time;
the water turbine is also connected with the water gate adjusting device, and the water gate adjusting device is used for controlling the opening or closing of a water gate of the water turbine;
the controller is respectively and electrically connected with the unloader, the water gate adjusting device, the grid-connected cabinet and the detection module, and the controller is used for controlling the unloader, the water gate adjusting device and the grid-connected cabinet in real time according to a plurality of power generation related parameters detected by the detection module.
Further, above-mentioned low head hydroelectric generation intelligence control system still includes the siren, the siren with the controller electricity is connected, the siren is used for sending out warning information when the controller detects abnormal conditions in real time.
Furthermore, the intelligent control system for low-water-head hydropower comprises a remote transmission operation module, wherein the remote transmission operation module is electrically connected with the detection module and is used for remotely monitoring and controlling the working state of the system.
Further, the plurality of power generation related parameters comprise an output parameter of the permanent magnet generator, a grid voltage, a temperature of the inverter, an output power of the inverter, a temperature of the permanent magnet generator, a rotating speed of the water turbine and a lubricating system state of the water turbine.
According to the technical scheme, compared with the prior art, the low-head hydropower intelligent control system can control the opening of the water valve according to the data detected by the detection module so as to adaptively adjust the generating power, analyzes the data detected by the detection module in real time through the controller, timely controls the grid-connected cabinet to be disconnected when a power grid works abnormally, releases the electric energy generated by the permanent magnet generator through the unloader, and can ensure that the inverter is not burnt out due to overvoltage or overload on the premise that the hydropower station runs under the high-load condition, so that the hydropower station can stably and continuously run.
On the other hand, the invention also provides a low-head hydroelectric generation intelligent control method, which comprises the following steps:
the method comprises the following steps: pressing a starting button of the controller, and carrying out self-checking operation by the system;
step two: after the self-checking is normal, the controller controls the water gate adjusting device to open the water gate to a preset opening degree, water flows through the water turbine, the water turbine is started to drive the permanent magnet generator to rotate, and the permanent magnet generator generates electric energy to be sent to the inverter;
step three: when the voltage generated by the permanent magnet generator reaches the working voltage value of the inverter, the inverter starts to work, the electric energy generated by the permanent magnet generator is rectified and inverted to obtain electric energy with stable voltage and stable frequency, and the electric energy is merged into a power grid through a grid-connected cabinet;
step four: the detection module monitors the output parameters of the permanent magnet generator, the voltage of a power grid, the temperature of the inverter, the output power of the inverter, the temperature of the permanent magnet generator, the rotating speed of the water turbine and the state of a lubricating system of the water turbine in real time and transmits the detected data to the controller in real time;
step five: the controller controls the working states of the water gate adjusting device, the unloader and the grid-connected cabinet in real time according to the data detected by the detection module and the power supply state of the power grid.
Further, the fifth step specifically includes:
when the data detected by the controller analysis detection module reach respective set threshold values and the hydropower station has residual water, the controller sends an instruction to control the water gate adjusting device to increase the water gate opening; and/or
When one or more detection values are larger than the set threshold value in the data detected by the controller analysis detection module, the controller sends an instruction to control the water gate adjusting device to reduce the opening degree of the water gate; and/or
When the detection system detects a power grid fault, the grid-connected cabinet is disconnected, and the controller controls the unloader to start; the controller controls the disconnecting switch of the inverter to be disconnected; the controller controls the water gate adjusting device to close the water gate.
Further, the intelligent control method for low-head hydroelectric generation further comprises the following steps:
step six: the alarm carries out real-time alarm prompt on the abnormal state of the system.
Further, the intelligent control method for low-head hydroelectric power generation further comprises the following steps:
step seven: and the remote transmission operation module is used for remotely monitoring and controlling the working state of the system.
According to the technical scheme, compared with the prior art, the method for intelligently controlling the low-water-head hydroelectric power generation can adaptively adjust the generating power of the hydropower station by controlling the opening of the water gate, timely controls the grid-connected cabinet to be disconnected and releases the electric energy generated by the permanent magnet generator through the unloader when the power grid works abnormally by analyzing the detected data in real time, and can not burn the inverter due to overvoltage or overload on the premise of ensuring that the hydropower station runs under the high-load condition, so that the hydropower station can stably and continuously run.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below, it is obvious that the drawings in the following description are only embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to the provided drawings without creative efforts.
FIG. 1 is a schematic structural diagram of a low head hydroelectric intelligent control system according to the present invention;
fig. 2 is a schematic flow chart of the intelligent control method for low-head hydroelectric power generation provided by the invention.
Detailed Description
The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
On one hand, referring to the attached fig. 1, the embodiment of the invention discloses a low-head water conservancy and power generation intelligent control system, which comprises: the system comprises a water turbine 1, a permanent magnet generator 2, an inverter 3, a grid-connected cabinet 4, a detection module 8, a controller 6, an unloader 7 and a water gate adjusting device 5;
the water turbine 1 is in transmission connection with the input end of the permanent magnet generator 2, and the water turbine 1 rotates under the drive of water flow to drive the permanent magnet generator 2 to operate;
the output end of the permanent magnet generator 2 is electrically connected with the input end of the inverter 3, and the inverter 3 carries out rectification and inversion processing on the electric energy output by the permanent magnet generator 2;
the output end of the inverter 3 is electrically connected with a grid-connected cabinet 4, the grid-connected cabinet 4 is connected to a power grid, and the grid-connected cabinet 4 is used for timely disconnecting from the power grid when the power supply of the power grid is abnormal;
the output end of the inverter 3 is also electrically connected with an unloader 7, and the unloader 7 is used for timely releasing the electric energy processed by the inverter 3 after the grid-connected cabinet 4 is disconnected with a power grid;
the detection module 8 is respectively and electrically connected with the water turbine 1, the permanent magnet generator 2, the inverter 3 and the grid-connected cabinet 4, and the detection module 8 is used for detecting multiple relevant power generation parameters in real time;
the water turbine 1 is also connected with a water gate adjusting device 5, and the water gate adjusting device 5 is used for controlling the opening or closing of a water gate of the water turbine 1;
the controller 6 is respectively electrically connected with the unloader 7, the water gate adjusting device 5, the grid-connected cabinet 4 and the detection module 8, and the controller 6 is used for controlling the unloader 7, the water gate adjusting device 5 and the grid-connected cabinet 4 in real time according to a plurality of power generation related parameters detected by the detection module 8.
In some embodiments, the intelligent control system for low head hydropower further comprises an alarm 10, the alarm 10 is electrically connected to the controller 6, and the alarm 10 is used for sending out warning information in real time when the controller 6 detects an abnormal state.
In some embodiments, the intelligent control system for low head hydropower further comprises a remote transmission operation module 9, the remote transmission operation module 9 is electrically connected with the detection module 8, and the remote transmission operation module 9 is used for remotely monitoring and controlling the working state of the system.
In a specific embodiment, the inverter 3, the grid-connected cabinet 4, the detection module 8, the controller 6, the remote transmission operation module 9 and the alarm 10 are generally disposed in a box.
Specifically, the multiple power generation related parameters include an output parameter of the permanent magnet generator, a grid voltage, a temperature of the inverter, an output power of the inverter, a temperature of the permanent magnet generator, a rotating speed of the water turbine, a lubricating system state of the water turbine and the like. The controller can send out instructions according to the data, inform the unloader, the water gate adjusting device and the alarm to act and send out corresponding instructions, and the hydropower station is ensured to operate safely under the maximum benefit all the time.
In a low-water-head water conservancy power generation intelligent system, a water turbine 1 and a permanent magnet generator 2 need to work under variable speed, and the generated voltage and the rotating speed of the traditional electric excitation generator are in an exponential relation. When the rotating speed deviates from the rated rotating speed, the electrically excited generator is rapidly increased or reduced, and the requirement is not met. The permanent magnet generator has constant magnetic field, linear relation between the generated voltage and the rotating speed, and proportional linear change of the voltage of the permanent magnet generator when the rotating speed of the water turbine changes, so that the requirement of the configuration system can be met, and the permanent magnet generator is required to be used.
The system provided by the embodiment has the working principle that:
in the power generation water-enriching period, when the output voltage or the output power of the permanent magnet generator is close to the upper limit protection value of the inverter, the controller sends out an instruction to inform the water gate adjusting device to close the water gate, the water flow into the water turbine is reduced, the energy sent out by the permanent magnet generator is reduced, and the inverter is prevented from entering an overload protection link. When the detection module detects that the index reaches the set value of the safe operation of the inverter, the instruction is released, and the closing of the water gate is stopped to keep the hydropower station to operate under the highest load.
On the contrary, after the rich water period of electricity generation, the water yield reduces, and under the original sluice opening condition, the water yield that flows into the hydraulic turbine diminishes, and hydraulic turbine permanent magnet generator rotational speed reduces, and permanent magnet generator output voltage and output can the step-down, and when detecting module detects that permanent magnet generator voltage and power are low to a definite value, the controller informs sluice adjusting device to increase the sluice opening, increases the inflow of the hydraulic turbine, improves the generating power of power station.
When the generated voltage and the output power reach set values, the controller sends an instruction to stop further increase of the water gate. By implanting the control link, the operation of the hydropower station under a high load condition can be kept, the inverter is not protected by overvoltage or overload, and the stable and continuous operation of the hydropower station is kept.
When the power grid suddenly has no early warning power failure or breakdown voltage, the grid-connected cabinet can be instantly disconnected with the power grid, in order to prevent the inverter from being burnt out due to the voltage rise of the permanent magnet generator caused by the voltage rise of the water turbine without output load and rotating speed rise, an unloading system mainly comprising an unloader and a protection system mainly comprising a water gate adjusting device are additionally arranged in the system, after the detection module detects the power grid fault, a controller informs the grid-connected cabinet to be disconnected, the unloading system is started at the same time, the electric energy generated by the permanent magnet generator is instantly switched on the unloading system, the unloading system is equivalent to adding a large load to the permanent magnet generator, the open-circuit operation of the permanent magnet generator is avoided, the permanent magnet generator is kept to have a larger resistance torque to the water turbine, the rapid rise of the permanent magnet generator of the water turbine is delayed, the time is won for timely disconnecting an isolating switch arranged at the input end of the inverter, before the breakdown voltage of an IGBT is not risen yet, an isolating switch between the permanent magnet generator and the permanent magnet generator is disconnected, and the contact between the permanent magnet generator and the inverter is avoided from being burnt out.
Meanwhile, the controller immediately instructs the water gate adjusting device to close the water gate, so that the water turbine is rapidly stopped, the equipment is protected, and the water resource is prevented from running off.
On the other hand, referring to fig. 2, an embodiment of the present invention further provides a low head hydroelectric power generation intelligent control method, including the following steps:
s1: pressing a starting button of the controller, and carrying out self-checking operation by the system;
s2: after the self-checking is normal, the controller controls the water gate adjusting device to open the water gate to a preset opening degree, water flows through the water turbine, the water turbine is started to drive the permanent magnet generator to rotate, and the permanent magnet generator generates electric energy to be sent to the inverter;
s3: when the voltage generated by the permanent magnet generator reaches the working voltage value of the inverter, the inverter starts to work, unstable electric energy generated by the permanent magnet generator is rectified and inverted to obtain electric energy with stable voltage and stable frequency, such as electric energy of 50HZ and 400V, and the electric energy is merged into a power grid through a grid-connected cabinet;
s4: the detection module monitors the output parameters of the permanent magnet generator, the power grid voltage, the temperature of the inverter, the output power of the inverter, the temperature of the permanent magnet generator, the rotating speed of the water turbine and the state of a lubricating system of the water turbine in real time and transmits the detected data to the controller in real time;
s5: the controller controls the working states of the water gate adjusting device, the unloader and the grid-connected cabinet in real time according to the data detected by the detection module and the power supply state of the power grid.
In a specific embodiment, step S5 specifically includes:
when the data detected by the analysis and detection module of the controller reach respective set threshold values and the hydropower station has residual water, the controller sends an instruction to control the water gate adjusting device to increase the opening degree of the water gate, the rotating speed of the permanent magnet generator of the water turbine is further increased, the generating voltage is increased in the same proportion after the rotating speed of the permanent magnet generator is increased, the generating power is increased, the output power of the inverter is increased, and the generating capacity of the hydropower station is increased until the maximum generating capacity of the hydropower station is reached; and/or
When one or more detection values are larger than the set threshold value in the data detected by the controller analysis detection module, the controller sends an instruction to control the water gate adjusting device to reduce the opening degree of the water gate; and/or
When the detection system detects a power grid fault, the grid-connected cabinet is disconnected, and the controller controls the unloader to start; the controller controls the disconnecting switch of the inverter to be disconnected; the controller controls the water gate adjusting device to close the water gate.
It is readily seen that in a hydroelectric power station system, the inverter is an electronic device, can be instantaneously broken down under overtemperature or overpressure, is a weak link for system installation and operation, and all protection is mainly developed around the inverter.
When the power grid is suddenly powered off or broken down, the grid-connected cabinet is instantly disconnected with the power grid, the permanent magnet generator is in an idle running state, the resistance torque of the permanent magnet generator to the water turbine is zero, the kinetic energy of water rapidly pushes the water turbine to run in an accelerated mode, the rotating speed of the permanent magnet generator can be rapidly increased, if the control is not added, the voltage value sent by the permanent magnet generator rapidly reaches the limit voltage which can be born by a power tube of the inverter, and the core device IGBT of the inverter can be instantly broken down. In order to avoid the situations, an unloading link and a protection link are added in the method, when the detection module detects the power grid fault, the grid-connected cabinet is disconnected, and the controller sends out an instruction and three instructions simultaneously:
firstly, the unloading module is started, and the electric energy generated by the permanent magnet generator is instantly switched to an unloading system, wherein the unloading system is equivalent to a large load applied to the permanent magnet generator, so that the open-circuit operation of the permanent magnet generator is avoided, and the rapid increase of the rotating speed of the permanent magnet generator of the water turbine is also avoided;
secondly, the disconnecting switch arranged at the input end of the inverter is informed to be disconnected, and the electric connection between the inverter and the permanent magnet generator is released;
thirdly, the controller immediately instructs the water gate adjusting device to quickly close the water gate so as to quickly stop the water turbine. The three links are linked simultaneously, so that the inverter breakdown phenomenon caused by no early warning power failure or sudden failure of the power grid is avoided.
Specifically, when the hydropower station is required to stop working, a stop button of the controller is pressed, the controller sends an instruction to inform the water gate adjusting device to gradually reduce the water gate, the rotating speed of the permanent magnet generator of the water turbine is reduced, the output power of the inverter is gradually reduced, when the detection module detects that the output power of the inverter is close to zero, the controller sends an instruction to disconnect the grid-connected cabinet from the power grid, meanwhile, the controller sends an instruction to the water gate adjusting device to close the water gate, the water turbine stops, and the hydropower station quits the working state.
In some embodiments, the intelligent control method for low head hydroelectric power generation further comprises:
s6: the alarm carries out real-time alarm prompt on the abnormal state of the system.
In some embodiments, the intelligent control method for low head hydroelectric power generation further comprises:
s7: and the remote transmission operation module is used for remotely monitoring and controlling the working state of the system.
According to the technical scheme, compared with the prior art, the method for intelligently controlling the low-head hydroelectric generation can adaptively adjust the generating power of the hydropower station by controlling the opening of the water gate, timely control the grid-connected cabinet to be disconnected and release the electric energy generated by the permanent magnet generator through the unloader when the power grid works abnormally by analyzing the detected data in real time, and can ensure that the inverter is not burnt out due to overvoltage or overload on the premise of ensuring that the hydropower station runs under the condition of high load, so that the hydropower station can stably and continuously run.
The embodiments in the present description are described in a progressive manner, each embodiment focuses on differences from other embodiments, and the same and similar parts among the embodiments are referred to each other. The device disclosed by the embodiment corresponds to the method disclosed by the embodiment, so that the description is simple, and the relevant points can be referred to the method part for description.
The previous description of the disclosed embodiments is provided to enable any person skilled in the art to make or use the present invention. Various modifications to these embodiments will be readily apparent to those skilled in the art, and the generic principles defined herein may be applied to other embodiments without departing from the spirit or scope of the invention. Thus, the present invention is not intended to be limited to the embodiments shown herein but is to be accorded the widest scope consistent with the principles and novel features disclosed herein.
Claims (2)
1. An intelligent control method for low head hydropower, which is applied to an intelligent control system for low head hydropower, the system comprising: the system comprises a water turbine, a permanent magnet generator, an inverter, a grid-connected cabinet, a detection module, a controller, an unloader and a water gate adjusting device;
the water turbine is in transmission connection with the input end of the permanent magnet generator and is driven by water flow to rotate so as to drive the permanent magnet generator to operate;
the output end of the permanent magnet generator is electrically connected with the input end of the inverter, and the inverter carries out rectification and inversion processing on the electric energy output by the permanent magnet generator;
the output end of the inverter is electrically connected with the grid-connected cabinet, the grid-connected cabinet is connected to a power grid, and the grid-connected cabinet is used for timely disconnecting from the power grid when the power supply of the power grid is abnormal;
the output end of the inverter is also electrically connected with the unloader, and the unloader is used for timely releasing the electric energy processed by the inverter after the grid-connected cabinet is disconnected with a power grid;
the detection module is respectively and electrically connected with the water turbine, the permanent magnet generator, the inverter and the grid-connected cabinet and is used for detecting multiple relevant power generation parameters in real time;
the water turbine is also connected with the water gate adjusting device, and the water gate adjusting device is used for controlling the opening or closing of a water gate of the water turbine;
the controller is respectively electrically connected with the unloader, the water gate adjusting device, the grid-connected cabinet and the detection module, and is used for controlling the unloader, the water gate adjusting device and the grid-connected cabinet in real time according to a plurality of power generation related parameters detected by the detection module;
the intelligent control method for low-head hydroelectric generation comprises the following steps:
the method comprises the following steps: pressing a starting button of the controller, and carrying out self-checking operation by the system;
step two: after the self-checking is normal, the controller controls the water gate adjusting device to open the water gate to a preset opening degree, water flows through the water turbine, the water turbine is started to drive the permanent magnet generator to rotate, and the permanent magnet generator generates electric energy to be sent to the inverter;
step three: when the voltage generated by the permanent magnet generator reaches the working voltage value of the inverter, the inverter starts to work, the electric energy generated by the permanent magnet generator is rectified and inverted to obtain electric energy with stable voltage and stable frequency, and the electric energy is merged into a power grid through a grid-connected cabinet;
step four: the detection module monitors the output parameters of the permanent magnet generator, the power grid voltage, the temperature of the inverter, the output power of the inverter, the temperature of the permanent magnet generator, the rotating speed of the water turbine and the state of a lubricating system of the water turbine in real time and transmits the detected data to the controller in real time;
step five: the controller controls the working states of the water gate adjusting device, the unloader and the grid-connected cabinet in real time according to the data detected by the detection module and the power supply state of the power grid;
the fifth step specifically comprises:
when the data detected by the controller analysis detection module reach respective set threshold values and the hydropower station has residual water, the controller sends an instruction to control the water gate adjusting device to increase the water gate opening; and/or
When one or more detection values in the data detected by the controller analysis detection module are larger than a set threshold value, the controller sends an instruction to control the water gate adjusting device to reduce the opening degree of the water gate; and/or
When the detection system detects a power grid fault, the grid-connected cabinet is disconnected, and the controller controls the unloader to start; the controller controls the disconnecting switch of the inverter to be disconnected; the controller controls the water gate adjusting device to close the water gate, and the three links are linked simultaneously.
2. The intelligent control method for low head hydropower generation according to claim 1, wherein the plurality of power generation related parameters comprise an output parameter of the permanent magnet generator, a grid voltage, a temperature of the inverter, an output power of the inverter, a temperature of the permanent magnet generator, a rotation speed of the water turbine and a lubrication system state of the water turbine.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910920858.2A CN110661290B (en) | 2019-09-19 | 2019-09-19 | Low-water-head hydropower intelligent control system and method |
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| CN201910920858.2A CN110661290B (en) | 2019-09-19 | 2019-09-19 | Low-water-head hydropower intelligent control system and method |
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| CN110661290A CN110661290A (en) | 2020-01-07 |
| CN110661290B true CN110661290B (en) | 2023-03-03 |
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| CN112383253B (en) * | 2020-12-07 | 2022-04-19 | 中国长江电力股份有限公司 | Guide vane opening analog quantity open-loop control method and system for hydropower station monitoring system |
Citations (11)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2006141112A (en) * | 2004-11-11 | 2006-06-01 | Hitachi Industrial Equipment Systems Co Ltd | Hydraulic turbine generating system and inverter |
| CN102828890A (en) * | 2012-09-29 | 2012-12-19 | 中水珠江规划勘测设计有限公司 | Hydroelectric generating set for micro-head hydroenergy development |
| JP2013223324A (en) * | 2012-04-16 | 2013-10-28 | Torishima Pump Mfg Co Ltd | Water wheel power generation system |
| CN105182898A (en) * | 2015-09-28 | 2015-12-23 | 三明市新地数控设备制造有限公司 | Hydropower PLC intelligent control system |
| CN105703394A (en) * | 2016-03-14 | 2016-06-22 | 哈尔滨工程大学 | DC bus voltage control-based tidal current generation control system and DC bus voltage control method thereof |
| CN107276111A (en) * | 2016-04-08 | 2017-10-20 | 马力 | Novel water conservancy generating configuration system |
| CN107462433A (en) * | 2017-09-06 | 2017-12-12 | 上海电力学院 | Hydraulic generator simulated test control system |
| JP2018152933A (en) * | 2017-03-10 | 2018-09-27 | 株式会社明電舎 | Autonomous/interconnection operation automatic switching device in hydraulic power generating system |
| CN109274122A (en) * | 2018-11-20 | 2019-01-25 | 四川省辛普森动力设备有限公司 | Miniature hydro-power generation system and control method |
| CN109519319A (en) * | 2018-11-27 | 2019-03-26 | 湖南大学 | A kind of direct-drive permanent-magnetism hydroelectric power system |
| WO2019150517A1 (en) * | 2018-01-31 | 2019-08-08 | 中国電力株式会社 | Hydroelectric power generation control system and control method |
-
2019
- 2019-09-19 CN CN201910920858.2A patent/CN110661290B/en active Active
Patent Citations (11)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2006141112A (en) * | 2004-11-11 | 2006-06-01 | Hitachi Industrial Equipment Systems Co Ltd | Hydraulic turbine generating system and inverter |
| JP2013223324A (en) * | 2012-04-16 | 2013-10-28 | Torishima Pump Mfg Co Ltd | Water wheel power generation system |
| CN102828890A (en) * | 2012-09-29 | 2012-12-19 | 中水珠江规划勘测设计有限公司 | Hydroelectric generating set for micro-head hydroenergy development |
| CN105182898A (en) * | 2015-09-28 | 2015-12-23 | 三明市新地数控设备制造有限公司 | Hydropower PLC intelligent control system |
| CN105703394A (en) * | 2016-03-14 | 2016-06-22 | 哈尔滨工程大学 | DC bus voltage control-based tidal current generation control system and DC bus voltage control method thereof |
| CN107276111A (en) * | 2016-04-08 | 2017-10-20 | 马力 | Novel water conservancy generating configuration system |
| JP2018152933A (en) * | 2017-03-10 | 2018-09-27 | 株式会社明電舎 | Autonomous/interconnection operation automatic switching device in hydraulic power generating system |
| CN107462433A (en) * | 2017-09-06 | 2017-12-12 | 上海电力学院 | Hydraulic generator simulated test control system |
| WO2019150517A1 (en) * | 2018-01-31 | 2019-08-08 | 中国電力株式会社 | Hydroelectric power generation control system and control method |
| CN109274122A (en) * | 2018-11-20 | 2019-01-25 | 四川省辛普森动力设备有限公司 | Miniature hydro-power generation system and control method |
| CN109519319A (en) * | 2018-11-27 | 2019-03-26 | 湖南大学 | A kind of direct-drive permanent-magnetism hydroelectric power system |
Non-Patent Citations (1)
| Title |
|---|
| 应用卸荷支路提高风电***低电压穿越能力研究;孟庆天等;《电气技术》;20130715(第07期);第30-33页 * |
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