CN206807012U - A kind of micro-capacitance sensor of variable frequency transformer direct load control - Google Patents
A kind of micro-capacitance sensor of variable frequency transformer direct load control Download PDFInfo
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- CN206807012U CN206807012U CN201720473847.0U CN201720473847U CN206807012U CN 206807012 U CN206807012 U CN 206807012U CN 201720473847 U CN201720473847 U CN 201720473847U CN 206807012 U CN206807012 U CN 206807012U
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02B—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO BUILDINGS, e.g. HOUSING, HOUSE APPLIANCES OR RELATED END-USER APPLICATIONS
- Y02B70/00—Technologies for an efficient end-user side electric power management and consumption
- Y02B70/30—Systems integrating technologies related to power network operation and communication or information technologies for improving the carbon footprint of the management of residential or tertiary loads, i.e. smart grids as climate change mitigation technology in the buildings sector, including also the last stages of power distribution and the control, monitoring or operating management systems at local level
- Y02B70/3225—Demand response systems, e.g. load shedding, peak shaving
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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
- Y02E10/70—Wind energy
- Y02E10/76—Power conversion electric or electronic aspects
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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
- Y02E70/00—Other energy conversion or management systems reducing GHG emissions
- Y02E70/30—Systems combining energy storage with energy generation of non-fossil origin
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y04—INFORMATION OR COMMUNICATION TECHNOLOGIES HAVING AN IMPACT ON OTHER TECHNOLOGY AREAS
- Y04S—SYSTEMS INTEGRATING TECHNOLOGIES RELATED TO POWER NETWORK OPERATION, COMMUNICATION OR INFORMATION TECHNOLOGIES FOR IMPROVING THE ELECTRICAL POWER GENERATION, TRANSMISSION, DISTRIBUTION, MANAGEMENT OR USAGE, i.e. SMART GRIDS
- Y04S20/00—Management or operation of end-user stationary applications or the last stages of power distribution; Controlling, monitoring or operating thereof
- Y04S20/20—End-user application control systems
- Y04S20/222—Demand response systems, e.g. load shedding, peak shaving
Abstract
The utility model discloses a kind of micro-capacitance sensor of variable frequency transformer direct load control, the micro-capacitance sensor includes cooperative control system, variable frequency transformer, Wind turbines, wind-powered electricity generation fling-cut switch and tunable load fling-cut switch, cooperative control system is used for the wind speed parameter for obtaining Wind turbines, and according to the propeller pitch angle and switching state of wind speed parameter control Wind turbines, the rotating speed of variable frequency transformer and then the voltage and frequency for controlling variable voltage variable frequency ac bus, control Wind turbines are realized adaptive between the power output of Wind turbines and the input power of tunable load while providing to the micro-capacitance sensor and maximize electric energy.The utility model sets up adaptive joint-action mechanism between the power output of Wind turbines and the input power of tunable load, improves effect of the direct load control to balance wind power fluctuation.In addition, Wind turbines are connected by wind-powered electricity generation fling-cut switch with variable voltage and variable current ac bus, without being separately provided converters, cost is low.
Description
Technical field
Micro-capacitance sensor technical field is the utility model is related to, is controlled more particularly to a kind of variable frequency transformer direct load
Micro-capacitance sensor.
Background technology
The large-scale grid connection of generation of electricity by new energy is the inexorable trend of power network development, but the fluctuation of new energy power output
Property, the safe and stable operation to power network brings very big challenge.Demand Side Response technology, it is intended to excavate all to maintaining electric energy
The equilibrium of supply and demand is helpful potential " resource ", improves receiving ability of the power network to generation of electricity by new energy.Direct load controls, and is current
One of widely used Demand Side Response technology, it is intended to by being ready that the load for receiving scheduling carries out directly control to realize
The equilibrium of supply and demand of electric energy.However, existing direct load control technology, lacking between tunable load and generation of electricity by new energy has certainly
The joint-action mechanism of adaptive functions, it is limited for the power swing effect of balance generation of electricity by new energy.
Therefore, how to provide a kind of scheme for solving above-mentioned technical problem is that those skilled in the art need to solve at present
Problem.
Utility model content
The purpose of this utility model is to provide a kind of micro-capacitance sensor of variable frequency transformer direct load control, by variable
Frequency transformer is to receiving the input power of the tunable load of direct load control and the power output of Wind turbines being carried out directly
The power adjusting connect, the elastic energy storage function of tunable load is given full play to, in the power output and tunable load of Wind turbines
Adaptive joint-action mechanism is set up between input power, improves effect of the direct load control to balance wind power fluctuation
Fruit.In addition, Wind turbines are connected by wind-powered electricity generation fling-cut switch with variable voltage and variable current ac bus, become without being separately provided power electronics
Parallel operation, cost are low.
In order to solve the above technical problems, the utility model provides a kind of the micro- of variable frequency transformer direct load control
Power network, including cooperative control system, variable frequency transformer, Wind turbines, wind-powered electricity generation fling-cut switch and tunable load fling-cut switch,
Wherein：
The first end of the variable frequency transformer is connected with middle pressure common frequency power network, and the second of the variable frequency transformer
End is connected with variable voltage variable frequency ac bus, and the 3rd end of the variable frequency transformer is connected with power supply；
The Wind turbines are connected by the wind-powered electricity generation fling-cut switch with the variable voltage variable frequency ac bus；
The variable voltage variable frequency ac bus is also connected by the tunable load fling-cut switch with tunable load；
The cooperative control system is opened with the variable frequency transformer, the Wind turbines and the wind-powered electricity generation switching respectively
Connection connects, for obtaining the wind speed parameter of the Wind turbines, and according to the oar of the wind speed parameter control Wind turbines
The voltage and frequency of elongation and switching state, the rotating speed of the variable frequency transformer and then the control variable voltage variable frequency ac bus
Rate, it is adaptive between the power output of the Wind turbines and the input power of the tunable load to realize.
Preferably, the tunable load includes pressure-adjustable frequency modulation AC load, and the tunable load fling-cut switch includes the
One pressure-adjustable AC load fling-cut switch, the pressure-adjustable frequency modulation AC load pass through the first pressure-adjustable AC load switching
Switch is directly connected with the variable voltage variable frequency ac bus.
Preferably, the tunable load also includes pressure-adjustable DC load, and the tunable load fling-cut switch also includes the
One pressure-adjustable DC load fling-cut switch, the micro-capacitance sensor also include three-phase diode rectifier；
The exchange end of the three-phase diode rectifier is connected with the variable voltage variable frequency ac bus, the three-phase diode
The DC terminal of rectifier is connected with transformation dc bus, and the pressure-adjustable DC load passes through the first pressure-adjustable DC load
Fling-cut switch is connected with the transformation dc bus.
Preferably, the micro-capacitance sensor also includes step-down transformer, Three-Phase PWM Rectifier, the first DC/DC converters and energy storage
System；
The high-pressure side of the step-down transformer is connected with medium pressure common frequency power network, the low-pressure side of the step-down transformer with
Constant voltage constant frequency ac bus connects, and the constant voltage constant frequency ac bus loads fling-cut switch by constant voltage constant frequency and handed over constant voltage constant frequency
Current load connects, and is also connected by the second pressure-adjustable AC load fling-cut switch and pressure-adjustable frequency modulation load；
The exchange end of the Three-Phase PWM Rectifier is connected with the constant voltage constant frequency ac bus, the Three-Phase PWM Rectifier
DC terminal be connected with constant voltage DC bus, the constant voltage DC bus passes through constant voltage DC and loads fling-cut switch and constant voltage DC
Load connection, is also connected by the second pressure-adjustable DC load fling-cut switch with the pressure-adjustable DC load；
The energy-storage system is connected by the first DC/DC converters with the constant voltage DC bus；
The cooperative control system also respectively with the step-down transformer, the control terminal of the Three-Phase PWM Rectifier and institute
State the control terminal connection of the first DC/DC converters.
Preferably, the variable frequency transformer includes double feedback electric engine, direct current generator and DC motor driver, wherein：
The double feedback electric engine coaxially mechanically connects with the direct current generator；
The direct current generator connects the constant voltage DC bus by the DC motor driver, and the constant voltage DC is female
Line is as the power supply；
First end of the stator winding of the double feedback electric engine as the variable frequency transformer；
Second end of the rotor windings of the double feedback electric engine as the variable frequency transformer.
Preferably, the micro-capacitance sensor also includes photovoltaic system and the 2nd DC/DC converters, and the photovoltaic system passes through described
2nd DC/DC converters are connected with the constant voltage DC bus.
Preferably, the cooperative control system is additionally operable to：
Obtain the voltage and current parameter of the high-pressure side winding of the step-down transformer, the stator of the variable frequency transformer
The voltage and current parameter of winding, the voltage and current parameter of rotor windings, the speed and current parameter of the direct current generator, the three-phase
The voltage and current parameter and the voltage and current parameter of DC terminal at the exchange end of PWM rectifier, the three-phase diode rectifier
The voltage parameter of DC terminal, the wind speed parameter of the Wind turbines, the intensity of illumination parameter of the photovoltaic system and the energy storage
The state-of-charge parameter of system；
Above-mentioned parameter according to receiving optimizes calculating, obtains the rotating speed of the variable frequency transformer, the wind
The propeller pitch angle and switching state of group of motors, the charge-discharge electric power of the energy-storage system, the reactive power of the Three-Phase PWM Rectifier
Optimal solution；
According to the optimal solution, the variable frequency is adjusted by the DC motor driver of the variable frequency transformer
The rotating speed of transformer is so as to adjusting the load of the load consuming power of the variable voltage variable frequency ac bus, the transformation dc bus
The rotating speed of power and the Wind turbines is consumed, the propeller pitch angle and switching state of the Wind turbines is adjusted, passes through described first
DC/DC converters adjust the charge-discharge electric power of the energy-storage system, and adjusting it by the Three-Phase PWM Rectifier exchanges the nothing at end
Work(power.
Preferably, the process that the above-mentioned parameter that the basis receives optimizes calculating is specially：
Generated energy maximization, the power attenuation of the energy-storage system and longevity after own loss are deducted with the Wind turbines
Life loss is minimised as optimization aim, and unit power is maintained to the access point of medium pressure common frequency power network with the whole micro-capacitance sensor
Factor and active power timesharing it is constant be constraints, optimize calculating.
Preferably, the process of the switching state of the regulation Wind turbines is specially：
When the wind energy of Wind turbines capture is more than its own loss, the wind-powered electricity generation fling-cut switch is closed, so that institute
State Wind turbines and provide electric energy to the micro-capacitance sensor；
When the wind energy of Wind turbines capture is equal to its own loss, the wind-powered electricity generation fling-cut switch is closed, so that the wind
Group of motors provides inertial supports to the micro-capacitance sensor；
When the wind energy of Wind turbines capture is less than its own loss, the wind-powered electricity generation fling-cut switch is disconnected.
In order to solve the above technical problems, the utility model additionally provides a kind of variable frequency transformer direct load control
Micro-capacitance sensor operation method, based on micro-capacitance sensor as described above, this method includes：
Obtain the wind speed parameter of the Wind turbines；
The propeller pitch angle and switching state, the variable frequency transformer of the Wind turbines are controlled according to the wind speed parameter
Rotating speed so that control the voltage and frequency of the variable voltage variable frequency ac bus, control the Wind turbines to be carried to the micro-capacitance sensor
Oneself between the power output of the Wind turbines and the input power of the tunable load is realized while for maximizing electric energy
Adapt to.
The utility model provides a kind of micro-capacitance sensor of variable frequency transformer direct load control, including Collaborative Control system
System, variable frequency transformer, Wind turbines, wind-powered electricity generation fling-cut switch and tunable load fling-cut switch, the of variable frequency transformer
One end is connected with middle pressure common frequency power network, and the second end of variable frequency transformer is connected with variable voltage variable frequency ac bus, variable frequency
3rd end of transformer is connected with power supply；Wind turbines are connected by wind-powered electricity generation fling-cut switch with variable voltage variable frequency ac bus；Transformation
Frequency-changing AC bus is also connected by tunable load fling-cut switch with tunable load；Cooperative control system becomes with variable frequency respectively
Depressor, Wind turbines and the connection of wind-powered electricity generation fling-cut switch, are controlled for obtaining the wind speed parameter of Wind turbines, and according to wind speed parameter
The propeller pitch angle and switching state of Wind turbines, the rotating speed of variable frequency transformer and then the voltage for controlling variable voltage variable frequency ac bus
And frequency, it is adaptive between the power output of Wind turbines and the input power of tunable load to realize.
It can be seen that the input work for the tunable load that the utility model is controlled receiving direct load by variable frequency transformer
Rate and the direct power adjusting of power output progress to Wind turbines, the elastic energy storage function of tunable load is given full play to,
Adaptive joint-action mechanism is set up between the power output of Wind turbines and the input power of tunable load, is improved directly negative
Effect of the lotus control to balance wind power fluctuation.In addition, Wind turbines exchange mother with variable voltage and variable current by wind-powered electricity generation fling-cut switch
Line connects, and without being separately provided converters, cost is low.
Brief description of the drawings
, below will be to prior art and embodiment in order to illustrate more clearly of the technical scheme in the embodiment of the utility model
In the required accompanying drawing used be briefly described, it should be apparent that, drawings in the following description are only of the present utility model
Some embodiments, for those of ordinary skill in the art, on the premise of not paying creative work, can also be according to this
A little accompanying drawings obtain other accompanying drawings.
Fig. 1 is a kind of structural representation of the micro-capacitance sensor of variable frequency transformer direct load control provided by the utility model
Figure.
Embodiment
Core of the present utility model is to provide a kind of micro-capacitance sensor of variable frequency transformer direct load control, by variable
Frequency transformer is to receiving the input power of the tunable load of direct load control and the power output of Wind turbines being carried out directly
The power adjusting connect, the elastic energy storage function of tunable load is given full play to, in the power output and tunable load of Wind turbines
Adaptive joint-action mechanism is set up between input power, improves effect of the direct load control to balance wind power fluctuation
Fruit.In addition, Wind turbines are connected by wind-powered electricity generation fling-cut switch with variable voltage and variable current ac bus, become without being separately provided power electronics
Parallel operation, cost are low.
It is new below in conjunction with this practicality to make the purpose, technical scheme and advantage of the utility model embodiment clearer
Accompanying drawing in type embodiment, the technical scheme in the embodiment of the utility model is clearly and completely described, it is clear that is retouched
The embodiment stated is the utility model part of the embodiment, rather than whole embodiments.Based on the implementation in the utility model
Example, the every other embodiment that those of ordinary skill in the art are obtained under the premise of creative work is not made, is belonged to
The scope of the utility model protection.
Fig. 1 is refer to, Fig. 1 is a kind of micro-capacitance sensor of variable frequency transformer direct load control provided by the utility model
Structural representation, the micro-capacitance sensor include cooperative control system 1, variable frequency transformer 2, Wind turbines 3, wind-powered electricity generation fling-cut switch
4 and tunable load fling-cut switch, wherein：
The first end of variable frequency transformer 2 is connected with middle pressure common frequency power network, and the second end of variable frequency transformer 2 is with becoming
Buckling frequency ac bus is connected, and the 3rd end of variable frequency transformer 2 is connected with power supply；
Wind turbines 3 are connected by wind-powered electricity generation fling-cut switch 4 with variable voltage variable frequency ac bus；
Variable voltage variable frequency ac bus is also connected by tunable load fling-cut switch with tunable load；
Cooperative control system 1 is connected with variable frequency transformer 2, Wind turbines 3 and wind-powered electricity generation fling-cut switch 4 respectively, is used for
The wind speed parameter of Wind turbines 3 is obtained, and according to the propeller pitch angle and switching state, variable ratio frequency changer of wind speed parameter control Wind turbines 3
The rotating speed of rate transformer 2 and then the voltage and frequency for controlling variable voltage variable frequency ac bus, to realize the power output of Wind turbines 3
It is adaptive between the input power of tunable load.
Firstly the need of explanation, when being controlled using variable frequency transformer 2 to Wind turbines 3, in highest wind
Under conditions of energy utilization rate, wind speed closes with the frequency of variable frequency transformer 2 and the proportional example of the rotating speed of Wind turbines 3 respectively
System.
Specifically, cooperative control system 1 can obtain the wind speed parameter of Wind turbines 3, and based on the generation control of above-mentioned principle
Signal, on the one hand, control the voltage and frequency of variable voltage variable frequency ac bus by controlling the rotating speed of variable frequency transformer 2
Rate, it is adjusted with the input power to tunable load, on the other hand, controls the propeller pitch angle and switching state of Wind turbines 3, with
The output frequency of Wind turbines 3 is controlled so that the rotating speed of Wind turbines 3 changes with wind speed, realizes Wind turbines 3
Maximum power output, finally realize adaptive between the power output of Wind turbines 3 and the input power of tunable load.
Specifically, the power output for the Wind turbines 3 being connected with variable voltage variable frequency ac bus is proportional to variable voltage variable frequency exchange
3 powers of busbar voltage amplitude, the input power for the tunable load being connected with variable voltage variable frequency ac bus are proportional to variable voltage variable frequency
2 powers of ac bus voltage magnitude, therefore, set up between the power output and tunable load input power of Wind turbines 3
The joint-action mechanism of " adaptive ", improve effect of the direct load control to balance wind power fluctuation.
In addition, direct power tune is carried out to receiving the tunable load that direct load controls by variable frequency transformer 2
Section, has given full play to " elastic energy storage " function of tunable load.
Meanwhile in the application, exported due to Wind turbines 3 need not be adjusted to the power of variable voltage variable frequency ac bus, namely
Wind turbines 3 need not be separately provided converters, and the group of motors in the application passes through wind-powered electricity generation fling-cut switch 4 with becoming buckling
Ac bus connection is flowed, cost is low.
Preferably, tunable load includes pressure-adjustable frequency modulation AC load, and tunable load fling-cut switch can including first
Pressure regulation AC load fling-cut switch 51, pressure-adjustable frequency modulation AC load are direct by the first pressure-adjustable AC load fling-cut switch 51
It is connected with variable voltage variable frequency ac bus.
Preferably, tunable load also includes pressure-adjustable DC load, and tunable load fling-cut switch can also including first
Voltage regulation DC loads fling-cut switch 52, and micro-capacitance sensor also includes three-phase diode rectifier 9；
The exchange end of three-phase diode rectifier 9 is connected with variable voltage variable frequency ac bus, three-phase diode rectifier 9 it is straight
Stream end is connected with transformation dc bus, and pressure-adjustable DC load is by the first pressure-adjustable DC load fling-cut switch 52 with becoming straightening
Flow bus connection.
Specifically, the tunable load for direct load control generally includes pressure-adjustable frequency modulation AC load and adjustable straightening
Current load.
In actual applications, pressure-adjustable frequency modulation AC load except by the first pressure-adjustable AC load fling-cut switch 51 with
Variable voltage variable frequency ac bus connects, and is also connected by the second pressure-adjustable AC load fling-cut switch 54 with constant voltage constant frequency ac bus
(will hereafter mention), its method of operation are：If pressure-adjustable frequency modulation AC load is arranged to receive direct load control,
Its first pressure-adjustable AC load fling-cut switch 51 between variable voltage variable frequency ac bus is closed, if pressure-adjustable frequency modulation exchanges
Load is arranged to not receive direct load control, then closes its second pressure-adjustable between constant voltage constant frequency ac bus and exchange
Load fling-cut switch 54.
Pressure-adjustable DC load is except passing through the first pressure-adjustable DC load fling-cut switch 52 and variable voltage variable frequency ac bus
Connection, is also connected with constant voltage DC bus and (will hereafter be mentioned) by the second pressure-adjustable DC load fling-cut switch 55, and it is transported
Line mode is：If pressure-adjustable DC load is arranged to receive direct load control, close itself and transformation dc bus it
Between the first pressure-adjustable DC load fling-cut switch 52, if pressure-adjustable DC load is arranged to not receive direct load control
System, then close its second pressure-adjustable DC load fling-cut switch 55 between constant voltage DC bus.
Wherein, when pressure-adjustable frequency modulation AC load receives direct load control, the power decision that it is consumed is in variable voltage variable frequency
The voltage magnitude of ac bus, controlled by the rotating speed of variable frequency transformer 2；
Wherein, when pressure-adjustable DC load receives direct load control, the power decision that it is consumed is in transformation dc bus
Voltage magnitude, controlled by the rotating speed of variable frequency transformer 2.
Preferably, micro-capacitance sensor also include step-down transformer 6, Three-Phase PWM Rectifier 7, the first DC/DC converters 8 and
Energy-storage system；
The high-pressure side of step-down transformer 6 is connected with middle pressure common frequency power network, and low-pressure side and the constant voltage constant frequency of step-down transformer 6 are handed over
Bus connection is flowed, constant voltage constant frequency ac bus loads fling-cut switch 53 by constant voltage constant frequency and is connected with constant voltage constant frequency AC load,
Also connected by the second pressure-adjustable AC load fling-cut switch 54 and the load of pressure-adjustable frequency modulation；
The exchange end of Three-Phase PWM Rectifier 7 is connected with constant voltage constant frequency ac bus, the DC terminal of Three-Phase PWM Rectifier 7 with
Constant voltage DC bus connects, and constant voltage DC bus loads fling-cut switch 56 by constant voltage DC and connected with constant voltage DC load, also
It is connected by the second pressure-adjustable DC load fling-cut switch 55 with pressure-adjustable DC load；
Energy-storage system is connected by the first DC/DC converters 8 with constant voltage DC bus；
Cooperative control system 1 also becomes with step-down transformer 6, the control terminal of Three-Phase PWM Rectifier 7 and the first DC/DC respectively
The control terminal connection of parallel operation 8.
Specifically, cooperative control system 1 can also be micro- to realize by the DC/DC converters 8 of Three-Phase PWM Rectifier 7 and the first
Energetic interaction between power network and energy-storage system.
Preferably, variable frequency transformer 2 includes double feedback electric engine, direct current generator and DC motor driver, wherein：
Double feedback electric engine coaxially mechanically connects with direct current generator；
Direct current generator connects constant voltage DC bus by DC motor driver, and constant voltage DC bus is as power supply；
First end of the stator winding of double feedback electric engine as variable frequency transformer 2；
Second end of the rotor windings of double feedback electric engine as variable frequency transformer 2.
Specifically, variable frequency transformer 2 receives the control of cooperative control system 1, on the one hand, realizes and variable voltage variable frequency is handed over
The frequency of bus and the control of voltage are flowed, on the other hand, frequency-changing AC electricity can be converted to by power frequency by speed change fm role
Alternating current, the stator winding of double feedback electric engine is by industrial frequency AC electrical pumping common frequency power network.
Certainly, other kinds of variable frequency transformer 2 can also be used in the application, skill of the present utility model can be realized
Art purpose.
Preferably, micro-capacitance sensor also includes photovoltaic system and the 2nd DC/DC converters 10, photovoltaic system pass through second
DC/DC converters 10 are connected with constant voltage DC bus.
Further to improve the function of the micro-capacitance sensor of the application offer, the application also includes photovoltaic system and the 2nd DC/DC
Converter 10, so as to make full use of new energy.
Preferably, cooperative control system 1 is additionally operable to：
The voltage and current parameter of the high-pressure side winding of step-down transformer 6 is obtained, the stator winding of variable frequency transformer 2
Voltage and current parameter, the voltage and current parameter of rotor windings, direct current generator speed and current parameter, Three-Phase PWM Rectifier 7 friendship
Flow end voltage and current parameter and the voltage and current parameter of DC terminal, three-phase diode rectifier 9 DC terminal voltage parameter,
The state-of-charge parameter of the wind speed parameter of Wind turbines 3, the intensity of illumination parameter of photovoltaic system and energy-storage system；
Above-mentioned parameter according to receiving optimizes calculating, obtains rotating speed, the Wind turbines 3 of variable frequency transformer 2
Propeller pitch angle and switching state, the charge-discharge electric power of energy-storage system, Three-Phase PWM Rectifier 7 reactive power optimal solution；
According to optimal solution, turning for variable frequency transformer 2 is adjusted by the DC motor driver of variable frequency transformer 2
Speed is so as to adjusting the load consuming power and Wind turbines of the load consuming power of variable voltage variable frequency ac bus, transformation dc bus
3 rotating speed, the propeller pitch angle and switching state of regulating wind power unit 3, filling for energy-storage system is adjusted by the first DC/DC converters 8
Discharge power, it is adjusted by Three-Phase PWM Rectifier 7 and exchanges the reactive power at end.
Specifically, the micro-capacitance sensor of the direct load of variable frequency transformer 2 provided herein control passes through Collaborative Control
System 1 receives each busbar voltage current parameters, the wind speed parameter of Wind turbines 3, photovoltaic system intensity of illumination parameter, energy-storage system lotus
Electricity condition parameter simultaneously optimizes calculating, and then controls variable frequency transformer 2 to adjust rotating speed so as to adjust variable voltage variable frequency exchange
Load consuming power, the load consuming power of transformation dc bus and the rotating speed of wind power generating set of bus, control wind turbine
Group 3 and its fling-cut switch regulation propeller pitch angle and switching state, control energy-storage system and its DC/DC converters regulation charge and discharge electric work
Rate, control Three-Phase PWM Rectifier 7 adjust reactive power, to reach by direct load control and energy-storage system charge and discharge control
The target of the random fluctuation of generation of electricity by new energy power is balanced, realizes the stable operation of micro-capacitance sensor, is solved conventional in the prior art
The technical problem that the fluctuation feature of new energy impacts to power network, maximize generation of electricity by new energy amount and make micro-capacitance sensor centering
Press common frequency power network access point to maintain unity power factor and active power timesharing constant, reduce the scheduling difficulty of higher level's power network.
In addition, Three-Phase PWM Rectifier 7 can also be by the regulation for the active power for exchanging it end, to maintain constant pressure straight
Flow the constant of busbar voltage.
Preferably, the process for calculating being optimized according to the above-mentioned parameter received is specially：
Generated energy maximization, the power attenuation of energy-storage system and life consumption after own loss are deducted with Wind turbines 3
Optimization aim is minimised as, the access point for pressing common frequency power network with whole micro-capacitance sensor centering maintains unity power factor and active power
Constant timesharing is constraints, optimizes calculating.
In addition, the application is not particularly limited for specifically which kind of algorithm to optimize calculating using, such as this
In can using particle algorithm come optimize calculate, certainly, other algorithms can also be used here.
Preferably, the process of the switching state of regulating wind power unit 3 is specially：
When the wind energy that Wind turbines 3 capture is more than its own loss, closure wind-powered electricity generation fling-cut switch 4, so that Wind turbines 3
Electric energy is provided to micro-capacitance sensor；
When the wind energy that Wind turbines 3 capture is equal to its own loss, closure wind-powered electricity generation fling-cut switch 4, so that Wind turbines 3
Inertial supports are provided to micro-capacitance sensor；
When the wind energy that Wind turbines 3 capture is less than its own loss, wind-powered electricity generation fling-cut switch 4 is disconnected.
Specifically, in the application, when the wind energy that Wind turbines 3 capture is equal to its own loss, closure wind-powered electricity generation switching is opened
4 are closed, Wind turbines 3 can provide inertial supports for micro-capacitance sensor, improve the stability and reliability of micro-capacitance sensor.
The utility model provides a kind of micro-capacitance sensor of variable frequency transformer direct load control, including Collaborative Control system
System, variable frequency transformer, Wind turbines, wind-powered electricity generation fling-cut switch and tunable load fling-cut switch, the of variable frequency transformer
One end is connected with middle pressure common frequency power network, and the second end of variable frequency transformer is connected with variable voltage variable frequency ac bus, variable frequency
3rd end of transformer is connected with power supply；Wind turbines are connected by wind-powered electricity generation fling-cut switch with variable voltage variable frequency ac bus；Transformation
Frequency-changing AC bus is also connected by tunable load fling-cut switch with tunable load；Cooperative control system becomes with variable frequency respectively
Depressor, Wind turbines and the connection of wind-powered electricity generation fling-cut switch, are controlled for obtaining the wind speed parameter of Wind turbines, and according to wind speed parameter
The propeller pitch angle and switching state of Wind turbines, the rotating speed of variable frequency transformer and then the voltage for controlling variable voltage variable frequency ac bus
And frequency, it is adaptive between the power output of Wind turbines and the input power of tunable load to realize.
It can be seen that the input work for the tunable load that the utility model is controlled receiving direct load by variable frequency transformer
Rate and the direct power adjusting of power output progress to Wind turbines, the elastic energy storage function of tunable load is given full play to,
Adaptive joint-action mechanism is set up between the power output of Wind turbines and the input power of tunable load, is improved directly negative
Effect of the lotus control to balance wind power fluctuation.In addition, Wind turbines exchange mother with variable voltage and variable current by wind-powered electricity generation fling-cut switch
Line connects, and without being separately provided converters, cost is low.
It should be noted that in this manual, such as first and second or the like relational terms are used merely to one
Individual entity or operation make a distinction with another entity or operation, and not necessarily require or imply these entities or operate it
Between any this actual relation or order be present.Moreover, term " comprising ", "comprising" or its any other variant are intended to
Cover including for nonexcludability, so that process, method, article or equipment including a series of elements not only include those
Key element, but also the other element including being not expressly set out, or also include for this process, method, article or set
Standby intrinsic key element.In the absence of more restrictions, the key element limited by sentence "including a ...", it is not excluded that
Other identical element in the process including the key element, method, article or equipment also be present.
The foregoing description of the disclosed embodiments, professional and technical personnel in the field are enable to realize or new using this practicality
Type.A variety of modifications to these embodiments will be apparent for those skilled in the art, determine herein
The General Principle of justice can be realized in other embodiments in the case where not departing from spirit or scope of the present utility model.Cause
This, the utility model is not intended to be limited to the embodiments shown herein, and is to fit to and principles disclosed herein
The most wide scope consistent with features of novelty.
Claims (9)
1. the micro-capacitance sensor of a kind of variable frequency transformer direct load control, it is characterised in that including cooperative control system, variable
Frequency transformer, Wind turbines, wind-powered electricity generation fling-cut switch and tunable load fling-cut switch, wherein：
The first end of the variable frequency transformer with it is middle pressure common frequency power network be connected, the second end of the variable frequency transformer and
Variable voltage variable frequency ac bus is connected, and the 3rd end of the variable frequency transformer is connected with power supply；
The Wind turbines are connected by the wind-powered electricity generation fling-cut switch with the variable voltage variable frequency ac bus；
The variable voltage variable frequency ac bus is also connected by the tunable load fling-cut switch with tunable load；
The cooperative control system connects with the variable frequency transformer, the Wind turbines and the wind-powered electricity generation fling-cut switch respectively
Connect, for obtaining the wind speed parameter of the Wind turbines, and according to the propeller pitch angle of the wind speed parameter control Wind turbines
With switching state, the variable frequency transformer rotating speed so that control the voltage and frequency of the variable voltage variable frequency ac bus,
Realized while controlling the Wind turbines to provide to the micro-capacitance sensor and maximize electric energy the power outputs of the Wind turbines with
It is adaptive between the input power of the tunable load.
2. micro-capacitance sensor as claimed in claim 1, it is characterised in that the tunable load includes pressure-adjustable frequency modulation AC load,
The tunable load fling-cut switch includes the first pressure-adjustable AC load fling-cut switch, and the pressure-adjustable frequency modulation AC load passes through
The first pressure-adjustable AC load fling-cut switch is directly connected with the variable voltage variable frequency ac bus.
3. micro-capacitance sensor as claimed in claim 2, it is characterised in that the tunable load also includes pressure-adjustable DC load, institute
Stating tunable load fling-cut switch also includes the first pressure-adjustable DC load fling-cut switch, and the micro-capacitance sensor also includes three-phase diode
Rectifier；
The exchange end of the three-phase diode rectifier is connected with the variable voltage variable frequency ac bus, the three-phase diode rectification
The DC terminal of device is connected with transformation dc bus, and the pressure-adjustable DC load passes through the first pressure-adjustable DC load switching
Switch is connected with the transformation dc bus.
4. micro-capacitance sensor as claimed in claim 3, it is characterised in that it is whole that the micro-capacitance sensor also includes step-down transformer, three-phase PWM
Flow device, the first DC/DC converters and energy-storage system；
The high-pressure side of the step-down transformer is connected with medium pressure common frequency power network, the low-pressure side and constant pressure of the step-down transformer
Constant frequency ac bus is connected, and the constant voltage constant frequency ac bus is exchanged negative by constant voltage constant frequency load fling-cut switch with constant voltage constant frequency
Connection is carried, is also connected by the second pressure-adjustable AC load fling-cut switch and pressure-adjustable frequency modulation load；
The exchange end of the Three-Phase PWM Rectifier is connected with the constant voltage constant frequency ac bus, the Three-Phase PWM Rectifier it is straight
Stream end is connected with constant voltage DC bus, and the constant voltage DC bus loads fling-cut switch by constant voltage DC and loaded with constant voltage DC
Connection, is also connected by the second pressure-adjustable DC load fling-cut switch with the pressure-adjustable DC load；
The energy-storage system is connected by the first DC/DC converters with the constant voltage DC bus；
The cooperative control system also respectively with the step-down transformer, the control terminal of the Three-Phase PWM Rectifier and described
The control terminal connection of one DC/DC converters.
5. micro-capacitance sensor as claimed in claim 4, it is characterised in that the variable frequency transformer includes double feedback electric engine, direct current
Motor and DC motor driver, wherein：
The double feedback electric engine coaxially mechanically connects with the direct current generator；
The direct current generator connects the constant voltage DC bus by the DC motor driver, and the constant voltage DC bus is made
For the power supply；
First end of the stator winding of the double feedback electric engine as the variable frequency transformer；
Second end of the rotor windings of the double feedback electric engine as the variable frequency transformer.
6. micro-capacitance sensor as claimed in claim 5, it is characterised in that the micro-capacitance sensor also includes photovoltaic system and the 2nd DC/DC
Converter, the photovoltaic system are connected by the 2nd DC/DC converters with the constant voltage DC bus.
7. micro-capacitance sensor as claimed in claim 6, it is characterised in that the cooperative control system is additionally operable to：
Obtain the voltage and current parameter of the high-pressure side winding of the step-down transformer, the stator winding of the variable frequency transformer
Voltage and current parameter, the voltage and current parameter of rotor windings, the speed and current parameter of the direct current generator, the three-phase PWM
The voltage and current parameter at exchange end and voltage and current parameter, the direct current of the three-phase diode rectifier of DC terminal of rectifier
The voltage parameter at end, the wind speed parameter of the Wind turbines, the intensity of illumination parameter of the photovoltaic system and the energy-storage system
State-of-charge parameter；
Above-mentioned parameter according to receiving optimizes calculating, obtains the rotating speed of the variable frequency transformer, the wind turbine
Group propeller pitch angle and switching state, the charge-discharge electric power of the energy-storage system, the Three-Phase PWM Rectifier reactive power most
Excellent solution；
According to the optimal solution, the variable frequency transformation is adjusted by the DC motor driver of the variable frequency transformer
The rotating speed of device is so as to adjusting the load consumption of the load consuming power of the variable voltage variable frequency ac bus, the transformation dc bus
The rotating speed of power and the Wind turbines, the propeller pitch angle and switching state of the Wind turbines are adjusted, pass through the first DC/DC
Converter adjusts the charge-discharge electric power of the energy-storage system, and adjusting it by the Three-Phase PWM Rectifier exchanges the idle work(at end
Rate.
8. micro-capacitance sensor as claimed in claim 7, it is characterised in that the above-mentioned parameter that the basis receives optimizes calculating
Process be specially：
The generated energy maximization after own loss, the power attenuation of the energy-storage system and life-span damage are deducted with the Wind turbines
Consumption is minimised as optimization aim, and unity power factor is maintained to the access point of medium pressure common frequency power network with the whole micro-capacitance sensor
Constant with active power timesharing is constraints, optimizes calculating.
9. micro-capacitance sensor as claimed in claim 8, it is characterised in that the process of the switching state of the regulation Wind turbines
Specially：
When the wind energy of Wind turbines capture is more than its own loss, the wind-powered electricity generation fling-cut switch is closed, so that the wind
Group of motors provides electric energy to the micro-capacitance sensor；
When the wind energy of Wind turbines capture is equal to its own loss, the wind-powered electricity generation fling-cut switch is closed, so that the wind turbine
Group provides inertial supports to the micro-capacitance sensor；
When the wind energy of Wind turbines capture is less than its own loss, the wind-powered electricity generation fling-cut switch is disconnected.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201720473847.0U CN206807012U (en) | 2017-04-28 | 2017-04-28 | A kind of micro-capacitance sensor of variable frequency transformer direct load control |
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|---|---|---|---|
| CN201720473847.0U CN206807012U (en) | 2017-04-28 | 2017-04-28 | A kind of micro-capacitance sensor of variable frequency transformer direct load control |
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| CN206807012U true CN206807012U (en) | 2017-12-26 |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106887847A (en) * | 2017-04-28 | 2017-06-23 | 广东工业大学 | A kind of micro-capacitance sensor and its operation method of the control of variable frequency transformer direct load |
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2017
- 2017-04-28 CN CN201720473847.0U patent/CN206807012U/en not_active Withdrawn - After Issue
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106887847A (en) * | 2017-04-28 | 2017-06-23 | 广东工业大学 | A kind of micro-capacitance sensor and its operation method of the control of variable frequency transformer direct load |
| CN106887847B (en) * | 2017-04-28 | 2019-09-06 | 广东工业大学 | A kind of micro-capacitance sensor and its operation method of the control of variable frequency transformer direct load |
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