CN108199413A - A kind of micro-capacitance sensor plug and play processing method - Google Patents
A kind of micro-capacitance sensor plug and play processing method Download PDFInfo
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- H02J3/382—
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02J—CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
- H02J3/00—Circuit arrangements for ac mains or ac distribution networks
- H02J3/38—Arrangements for parallely feeding a single network by two or more generators, converters or transformers
- H02J3/40—Synchronising a generator for connection to a network or to another generator
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02J—CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
- H02J3/00—Circuit arrangements for ac mains or ac distribution networks
- H02J3/38—Arrangements for parallely feeding a single network by two or more generators, converters or transformers
- H02J3/388—Islanding, i.e. disconnection of local power supply from the network
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Abstract
The application provides a kind of micro-capacitance sensor plug and play processing method, the method includes：In real time monitoring micro-capacitance sensor in each micro- source, energy storage, load, busbar voltage status information；Whether monitoring communication interface works normally in real time；Using virtual synchronous generator model algorithm, inverter is controlled, generates the drive signal of inverter；The frequency of the voltage and current of monitoring external electrical network, amplitude, phase angle in real time, judge whether external electrical network is normal according to the frequency, the amplitude, the phase angle；If the external electrical network is normal, then judge whether the micro-capacitance sensor meets grid-connected adjusting condition with the external electrical network according to the frequency, the amplitude, the phase angle, if meeting the grid-connected adjusting condition, control the micro-capacitance sensor and the external electrical network grid-connected.Using each embodiment of the application, micro-capacitance sensor and the Fast synchronization of external electrical network in the case of no synchronization unit can be realized, realize friendly grid-connected.
Description
Technical field
This application involves distribution technique field, more particularly to a kind of micro-capacitance sensor plug and play processing method.
Background technology
Energy and environmental problem is our times various countries focus of attention.In China, to realize national " energy-saving and emission-reduction "
Set objective, power industry greatly develop various renewable energy power generations in Generation Side, thus lead to wind-power electricity generation, photovoltaic generation
The fast development of distributed power supply and micro-capacitance sensor.Micro-capacitance sensor is the strong supplement of bulk power grid and the weight in intelligent grid field
Component part is wanted, is had wide practical use in industry and commerce region, city section, island and remote districts.Micro-capacitance sensor can be abundant
Using the complementarity of a variety of distributed energies, the utilization ratio of various energy resources is promoted.Currently for distributed generation resource plug and play
Device, existing scholar are studied, mainly for single photovoltaic generating system or photovoltaic energy storage electricity generation system.About micro- electricity
Net plug and play theoretical research is less.Guo Jia vigorously waits scholars to propose that the micro-capacitance sensor plug and play based on MAS is theoretical, constructs with electricity
3 layers of control system of micro-capacitance sensor of Agent, micro-capacitance sensor Agent and element Agent compositions are netted, are devised based on MAS systems and electric power
The plug and play model of electron controls technology, and detailed analysis micro-capacitance sensor element coordination control strategy.The scholars such as Huo Qunhai exist
The plug and play technique of micro-capacitance sensor and public electric wire net is proposed on the basis of micro-capacitance sensor stable operation.Micro-capacitance sensor by point of common coupling with
Public electric wire net connect, then by the micro- source of master control in micro-capacitance sensor and network process and off-network process take over seamlessly control, realization
Micro-capacitance sensor and public electric wire net plug and play.
But for micro-capacitance sensor plug and play method in terms of research it is less, as many areas are ever-increasing renewable
The promotion of energy demand, micro-capacitance sensor market will welcome fast development.In existing micro-grid connection method, micro-capacitance sensor can not be realized
It is grid-connected with the quick close friend of external electrical network, it can not ensure friendly grid-connected.
Invention content
The purpose of the embodiment of the present application is to provide a kind of micro-capacitance sensor plug and play processing method, to realize without synchronization unit
In the case of the Fast synchronization of micro-capacitance sensor and power grid, realize friendly grid-connected.
The embodiment of the present application provides what a kind of micro-capacitance sensor plug and play processing method was realized in：
A kind of micro-capacitance sensor plug and play processing method, the method includes：
In real time monitoring micro-capacitance sensor in each micro- source, energy storage, load, busbar voltage status information；
Whether monitoring communication interface works normally in real time；
Using virtual synchronous generator model algorithm, inverter is controlled, generates the drive signal of inverter；
The frequency of voltage and current of monitoring external electrical network, amplitude, phase angle in real time, according to the frequency, the amplitude,
The phase angle judges whether external electrical network is normal；
If the external electrical network is normal, according to the frequency, the amplitude, the phase angle judge the micro-capacitance sensor with
Whether the external electrical network meets grid-connected adjusting condition, if meeting the grid-connected adjusting condition, controls the micro-capacitance sensor and institute
It is grid-connected to state external electrical network.
It is described to use virtual synchronous generator model algorithm in preferred embodiment, inverter is controlled, generates inversion
The mode of the drive signal of device includes：
Using virtual synchronous engine mockup algorithm, the output voltage of inverter that is obtained according to measurement, output current with
And each inverter exports reference value, generates the modulated signal of inverter；
By the modulated signal compared with carrier signal, the drive signal of each IGBT of inverter is obtained, expected from realization
Inverter exports.
In preferred embodiment, the mode of the modulated signal of the generation inverter includes：
Carry out dq transformation, the DC quantity output voltage and the output current being converted under rotating coordinate system, meter
Calculate active power of output and output reactive power；
Frequency departure caused by the active power is calculated using virtual Governor Design formula, is calculated machinery
The reference value of power；
Excitation voltage deviation caused by the reactive power is calculated using virtual Design of Excitation Controller formula calculates
Obtain command voltage amplitude；
Using hypothetical rotor mechanical equation calculating torque difference, and then angular speed and phase angle is calculated；
According to the reference value of the mechanical output, described instruction voltage magnitude, the angular speed, the phase angle, synthesis three
The mutually voltage modulation signal of exchange.
In preferred embodiment, the virtual Governor Design formula includes expressions below：
In formula, δ represents the static difference coefficient of virtual synchronous machine；
Δ P represents power deviation；
Δ f represents frequency departure；
fNRepresent rated frequency；
PNRepresent rated power；
f1Represent frequency；
P1Represent active power.
In preferred embodiment, the virtual Design of Excitation Controller formula includes expressions below：
In formula, E represents the amplitude of excitation electric gesture；
U represents the amplitude of terminal voltage；
δ represents the phase angle between the excitation electric gesture and the terminal voltage, i.e. power angle；
θ represents power-factor angle；
X represents synchronous reactance；
Q represents inverter output reactive power.
In preferred embodiment, the hypothetical rotor mechanical equation includes：
In formula,Represent excitation electric gesture；
Represent armature voltage；
Represent armature supply；
RaRepresent armature resistance；
XaRepresent synchronous reactance；
J represents rotary inertia；
MTRepresent machine torque；
MeRepresent electromagnetic torque；
PTRepresent mechanical output；
PeRepresent electromagnetic power；
J represents angular rate；
ω represents synchronous angular rate；
θ represents electrical angle.
In preferred embodiment, the control micro-capacitance sensor includes with the external electrical network synchronizing mode：
It sends and instructs to switch module, carry out closing operation, realize micro-grid connection operation, and to microgrid energy management
System reports and net state.
In preferred embodiment, it is described according to the frequency, the amplitude, the phase angle judge the micro-capacitance sensor with it is described
Whether external electrical network meets the mode of grid-connected adjusting condition, including：
If the difference of the voltage magnitude of the micro-capacitance sensor and the voltage magnitude of the external electrical network is less than setting amplitude difference, and
The difference of the frequency of the voltage of the frequency of the voltage of the micro-capacitance sensor and the external electrical network is less than setpoint frequency difference, and described micro-
The phase angle of the voltage of power grid and the phase angle of the voltage of the external electrical network are less than setting phase angle difference, it is determined that described micro-
Power grid meets the grid-connected adjusting condition with the external electrical network.
In preferred embodiment, if the external electrical network is abnormal, the connection of micro-capacitance sensor and the external electrical network is disconnected, is controlled
Make the micro-capacitance sensor and the external electrical network off-network.
In preferred embodiment, if being unsatisfactory for the grid-connected adjusting condition, the micro-capacitance sensor and the external electrical network are disconnected
Connection, control the micro-capacitance sensor and the external electrical network off-network.
Using a kind of micro-capacitance sensor plug and play processing method provided by the embodiments of the present application, virtual synchronous power generation may be used
Machine model algorithm realizes the plug and play of micro-capacitance sensor.By the method, situation of the micro-capacitance sensor in no synchronization unit can be realized
Lower and power grid Fast synchronization realizes that close friend is grid-connected, and can realize that micro-capacitance sensor is run under isolated island, and operational mode switching moment
To the impact very little of system.Under islet operation pattern, the method can automatically adjust output voltage frequency and amplitude, make its defeated
Go out power match bearing power, improve power supply reliability.
Description of the drawings
In order to illustrate the technical solutions in the embodiments of the present application or in the prior art more clearly, to embodiment or it will show below
There is attached drawing needed in technology description to be briefly described, it should be apparent that, the accompanying drawings in the following description is only this
Some embodiments described in application, for those of ordinary skill in the art, in the premise of not making the creative labor property
Under, it can also be obtained according to these attached drawings other attached drawings.
Fig. 1 is a kind of method flow signal for micro-capacitance sensor plug and play processing method that the application one embodiment provides
Figure；
Specific embodiment
The embodiment of the present application provides a kind of micro-capacitance sensor plug and play processing method.
In order to make those skilled in the art better understand the technical solutions in the application, below in conjunction with the application reality
The attached drawing in example is applied, the technical solution in the embodiment of the present application is clearly and completely described, it is clear that described implementation
Example is merely a part but not all of the embodiments of the present application.Based on the embodiment in the application, this field is common
Technical staff's all other embodiments obtained without creative efforts should all belong to the application protection
Range.
Fig. 1 is a kind of a kind of herein described method flow schematic diagram of embodiment of micro-capacitance sensor plug and play processing method.
Although this application provides such as following embodiments or apparatus structure shown in the drawings, based on labor conventional or without creativeness
It is dynamic to include more or less modular units in said device.There is no necessary causal knots in logicality
In structure, the modular structure of these devices is not limited to the embodiment of the present application or modular structure shown in the drawings.The modular structure
Device in practice or end product in application, can be according to embodiment or modular structure shown in the drawings progress sequence
It performs and either parallel performs (such as the environment of parallel processor or multiple threads, the implementation for even including distributed treatment
Environment).
Specifically, as described in Figure 1, a kind of a kind of embodiment for micro-capacitance sensor plug and play processing method that the application provides can
To include：
S1：In real time monitoring micro-capacitance sensor in each micro- source, energy storage, load, busbar voltage status information.
S2：Whether monitoring communication interface works normally in real time.
S3：Using virtual synchronous generator model algorithm, inverter is controlled, generates the drive signal of inverter.
S4：The frequency of the voltage and current of monitoring external electrical network, amplitude, phase angle in real time, according to the frequency, the width
Value, the phase angle judge whether external electrical network is normal.
S5：If the external electrical network is normal, micro- electricity is judged according to the frequency, the amplitude, the phase angle
Whether net meets grid-connected adjusting condition with the external electrical network, if meeting the grid-connected adjusting condition, controls the micro-capacitance sensor
It is grid-connected with the external electrical network.
It is described to use virtual synchronous generator model algorithm in this example, inverter is controlled, generates the drive of inverter
The mode of dynamic signal can include：
Using virtual synchronous engine mockup algorithm, the output voltage of inverter that is obtained according to measurement, output current with
And each inverter exports reference value, generates the modulated signal of inverter；
By the modulated signal compared with carrier signal, the drive signal of each IGBT of inverter is obtained, expected from realization
Inverter exports.
Wherein, the mathematical model of the virtual synchronous generator model algorithm is as follows：
Due to angular rate ω=p Ω, p=1 herein, then above formula can be written as：
More than in two formulas,For excitation electric gesture,For armature voltage,For armature supply, RaFor armature resistance, XaIt is same
Reactance is walked, J is rotary inertia, MTFor machine torque, MeFor electromagnetic torque, PTFor mechanical output, PeFor electromagnetic power, PeFor electricity
Angular speed, ωNFor synchronous angular rate, θ is electrical angle.
In this example, the mode of the modulated signal of the generation inverter can include：
Carry out dq transformation, the DC quantity output voltage and the output current being converted under rotating coordinate system, meter
Calculate active power of output and output reactive power；
Frequency departure caused by the active power is calculated using virtual Governor Design formula, is calculated machinery
The reference value of power；
Excitation voltage deviation caused by the reactive power is calculated using virtual Design of Excitation Controller formula calculates
Obtain command voltage amplitude；
Using hypothetical rotor mechanical equation calculating torque difference, and then angular speed and phase angle is calculated；
According to the reference value of the mechanical output, described instruction voltage magnitude, the angular speed, the phase angle, synthesis three
The mutually voltage modulation signal of exchange.
In this example, the virtual Governor Design formula includes expressions below：
In formula, δ represents the static difference coefficient of virtual synchronous machine；
Δ P represents power deviation；
Δ f represents frequency departure；
fNRepresent rated frequency；
PNRepresent rated power；
f1Represent frequency；
P1Represent active power.
In this example, the virtual Design of Excitation Controller formula includes expressions below：
In formula, E represents the amplitude of excitation electric gesture；
U represents the amplitude of terminal voltage；
δ represents the phase angle between the excitation electric gesture and the terminal voltage, i.e. power angle；
θ represents power-factor angle；
X represents synchronous reactance；
Q represents inverter output reactive power.
In this example, the hypothetical rotor mechanical equation includes：
In formula,Represent excitation electric gesture；
Represent armature voltage；
Represent armature supply；
RaRepresent armature resistance；
XaRepresent synchronous reactance；
J represents rotary inertia；
MTRepresent machine torque；
MeRepresent electromagnetic torque；
PTRepresent mechanical output；
PeRepresent electromagnetic power；
J represents angular rate；
ω represents synchronous angular rate；
θ represents electrical angle.
In this example, the control micro-capacitance sensor includes with the external electrical network synchronizing mode：
It sends and instructs to switch module, carry out closing operation, realize micro-grid connection operation, and to microgrid energy management
System reports and net state.
It is described that the micro-capacitance sensor and the external electrical are judged according to the frequency, the amplitude, the phase angle in this example
Whether net meets the mode of grid-connected adjusting condition, can include：
If the difference of the voltage magnitude of the micro-capacitance sensor and the voltage magnitude of the external electrical network is less than setting amplitude difference, and
The difference of the frequency of the voltage of the frequency of the voltage of the micro-capacitance sensor and the external electrical network is less than setpoint frequency difference, and described micro-
The phase angle of the voltage of power grid and the phase angle of the voltage of the external electrical network are less than setting phase angle difference, it is determined that described micro-
Power grid meets the grid-connected adjusting condition with the external electrical network.
In this example, if the external electrical network is abnormal, the connection of micro-capacitance sensor and the external electrical network is disconnected, described in control
Micro-capacitance sensor and the external electrical network off-network.
In this example, if being unsatisfactory for the grid-connected adjusting condition, the connection of the micro-capacitance sensor and the external electrical network is disconnected,
Control the micro-capacitance sensor and the external electrical network off-network.
Using a kind of embodiment for micro-capacitance sensor plug and play processing method that above-described embodiment provides, may be used virtual
Synchro generator model algorithm realizes the plug and play of micro-capacitance sensor.By the method, micro-capacitance sensor can be realized without synchronizing list
With power grid Fast synchronization in the case of member, realize that close friend is grid-connected, and can realize that micro-capacitance sensor is run under isolated island, and operational mode
Switch impact very little of the moment to system.Under islet operation pattern, the method can automatically adjust output voltage frequency and width
Value makes its output power available power, improves power supply reliability.
Each embodiment in this specification is described by the way of progressive, the same or similar portion between each embodiment
Point just to refer each other, and the highlights of each of the examples are difference from other examples.
Although depicting the application by embodiment, it will be appreciated by the skilled addressee that the application there are many deformation and
Variation is without departing from spirit herein, it is desirable to which appended claim includes these deformations and changes without departing from the application's
Spirit.
Claims (10)
1. a kind of micro-capacitance sensor plug and play processing method, which is characterized in that the method includes：
In real time monitoring micro-capacitance sensor in each micro- source, energy storage, load, busbar voltage status information；
Whether monitoring communication interface works normally in real time；
Using virtual synchronous generator model algorithm, inverter is controlled, generates the drive signal of inverter；
The frequency of voltage and current of monitoring external electrical network, amplitude, phase angle in real time, according to the frequency, amplitude, described
Phase angle judges whether external electrical network is normal；
If the external electrical network is normal, according to the frequency, the amplitude, the phase angle judge the micro-capacitance sensor with it is described
Whether external electrical network meets grid-connected adjusting condition, if meeting the grid-connected adjusting condition, control the micro-capacitance sensor with it is described outer
Portion's power grid is grid-connected.
2. a kind of micro-capacitance sensor plug and play processing method as described in claim 1, which is characterized in that described to use virtual synchronous
Generator model algorithm, controls inverter, and the mode for generating the drive signal of inverter includes：
Using virtual synchronous engine mockup algorithm, the output voltage of inverter that is obtained according to measurement, output current and each
A inverter exports reference value, generates the modulated signal of inverter；
By the modulated signal compared with carrier signal, the drive signal of each IGBT of inverter, inversion expected from realization are obtained
Device exports.
3. a kind of micro-capacitance sensor plug and play processing method as claimed in claim 2, which is characterized in that the generation inverter
The mode of modulated signal includes：
Dq transformation is carried out, the DC quantity output voltage and the output current being converted under rotating coordinate system calculates defeated
Go out active power and output reactive power；
Frequency departure caused by the active power is calculated using virtual Governor Design formula, is calculated mechanical output
Reference value；
Excitation voltage deviation caused by the reactive power is calculated using virtual Design of Excitation Controller formula, is calculated
Command voltage amplitude；
Using hypothetical rotor mechanical equation calculating torque difference, and then angular speed and phase angle is calculated；
According to the reference value of the mechanical output, described instruction voltage magnitude, the angular speed, the phase angle, synthesis three is intersecting
The voltage modulation signal of stream.
4. a kind of micro-capacitance sensor plug and play processing method as claimed in claim 3, which is characterized in that the virtual governor is set
It counts formula and includes expressions below：
In formula, δ represents the static difference coefficient of virtual synchronous machine；
Δ P represents power deviation；
Δ f represents frequency departure；
fNRepresent rated frequency；
PNRepresent rated power；
f1Represent frequency；
P1Represent active power.
5. a kind of micro-capacitance sensor plug-and-play apparatus as claimed in claim 3, which is characterized in that the virtual excitation controller is set
It counts formula and includes expressions below：
In formula, E represents the amplitude of excitation electric gesture；
U represents the amplitude of terminal voltage；
δ represents the phase angle between the excitation electric gesture and the terminal voltage, i.e. power angle；
θ represents power-factor angle；
X represents synchronous reactance；
Q represents inverter output reactive power.
A kind of 6. micro-capacitance sensor plug-and-play apparatus as claimed in claim 3, which is characterized in that the hypothetical rotor mechanical equation
Including：
In formula,Represent excitation electric gesture；
Represent armature voltage；
Represent armature supply；
RaRepresent armature resistance；
XaRepresent synchronous reactance；
J represents rotary inertia；
MTRepresent machine torque；
MeRepresent electromagnetic torque；
PTRepresent mechanical output；
PeRepresent electromagnetic power；
J represents angular rate；
ω represents synchronous angular rate；
θ represents electrical angle.
A kind of 7. micro-capacitance sensor plug and play processing method as described in claim 1, which is characterized in that control micro- electricity
Net includes with the external electrical network synchronizing mode：
It sends and instructs to switch module, carry out closing operation, realize micro-grid connection operation, and to microgrid energy management system
Report simultaneously net state.
8. a kind of micro-capacitance sensor plug and play processing method as described in claim 1, which is characterized in that described according to the frequency
Rate, the amplitude, the phase angle judge whether the micro-capacitance sensor meets the mode of grid-connected adjusting condition with the external electrical network,
Including：
If the difference of the voltage magnitude of the micro-capacitance sensor and the voltage magnitude of the external electrical network is less than setting amplitude difference, and described
The difference of the frequency of the voltage of the frequency of the voltage of micro-capacitance sensor and the external electrical network is less than setpoint frequency difference, and the micro-capacitance sensor
The phase angle of voltage of phase angle and the external electrical network of voltage be less than setting phase angle difference, it is determined that the micro-capacitance sensor
Meet the grid-connected adjusting condition with the external electrical network.
9. a kind of micro-capacitance sensor plug and play processing method as described in claim 1, which is characterized in that if the external electrical network is not
Normally, then the connection of micro-capacitance sensor and the external electrical network is disconnected, controls the micro-capacitance sensor and the external electrical network off-network.
10. a kind of micro-capacitance sensor plug and play processing method as described in claim 1, which is characterized in that if described in being unsatisfactory for simultaneously
Net adjusting condition then disconnects the connection of the micro-capacitance sensor and the external electrical network, controls the micro-capacitance sensor and the external electrical network
Off-network.
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Application publication date: 20180622 |