CN109193673A - A kind of grid adaptability detection platform voltage fluctuation and flickering control method - Google Patents
A kind of grid adaptability detection platform voltage fluctuation and flickering control method Download PDFInfo
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- CN109193673A CN109193673A CN201811244568.2A CN201811244568A CN109193673A CN 109193673 A CN109193673 A CN 109193673A CN 201811244568 A CN201811244568 A CN 201811244568A CN 109193673 A CN109193673 A CN 109193673A
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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
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Abstract
The application, which has a try, shows a kind of grid adaptability detection platform voltage fluctuation and flickering control method, technical solution shown in the embodiment of the present application, the application, which passes through, is input to new energy grid adaptability detection platform voltage inverter for the output voltage instruction value being calculated, so that new energy grid adaptability detection platform voltage inverter is adjusted the output voltage of voltage inverter according to the output voltage instruction value, is followed with realizing that output voltage quickly accurately responds fluctuation and flickering controlling value.
Description
Technical field
The present invention relates to electrical equipment, in particular to a kind of grid adaptability detection platform voltage fluctuation and flickering
Control method.
Background technique
Increasingly depleted and power load in face of natural resources is continuously increased, and to greatly develop clean energy resource be the current world
Society's reply energy shortages, the important development direction for ensureing energy supply.
Since the unstability and fluctuation of solar energy and wind energy are larger, cause wind-powered electricity generation and photovoltaic unit active power output random
Fluctuation.This fluctuation is that a kind of disturb is possible to will cause low-frequency oscillation for the conventional thermal power unit on route, furthermore
It is this it is active fluctuation cause along reactive loss variation, cause system voltage to fluctuate, and be difficult to control.
Protection threshold set by the power electronic equipment of photovoltaic and Wind turbines is sensitiveer, and in some cases,
When disturbing in face of power grid, if there is large capacity photovoltaic and Wind turbines off-grid, system oscillation accident may cause, to power grid
Safe and reliable operation will cause it is unfavorable.
Therefore, it is examined by grid adaptability of the new energy grid adaptability detection platform to photovoltaic and Wind turbines
It surveys, is conducive to the promotion of the technical level and research and development ability of China's photovoltaic and Wind Power Generation Industry, promote extensive, high proportion new energy
After accessing power grid, the important means of power grid security reliability service.
The grid adaptability of photovoltaic and Wind turbines, which carries out the fluctuation of most critical and flicker test in detection process, compels to be essential
A kind of control method is wanted quickly to be accurately controlled the output voltage of new energy grid adaptability detection platform.
Summary of the invention
Goal of the invention of the invention is to provide a kind of grid adaptability detection platform voltage fluctuation and flickering controlling party
Method not enough leads to not essence to solve new energy grid adaptability detection platform voltage fluctuation and flickering voltage control response fastly
Really the problem of test new energy grid connection system.
The embodiment of the present application first aspect shows a kind of grid adaptability detection platform voltage fluctuation and flickering controlling party
Method, which comprises
Obtain inverter side voltage feedback value, inverter side current feedback values and the inversion of new energy grid adaptability detection platform
Side phase angle locking phase Reflector；
Obtain grid side voltage feedback value, grid side current feedback values and the power grid of new energy grid adaptability detection platform
Side phase angle locking phase Reflector calculates the active power feedback value of grid side；
By new energy grid adaptability detection platform inverter side voltage feedback value, according to preset fluctuation and flicker frequency
FFT processing is carried out, is fluctuated and flickering value of feedback；
New energy grid adaptability detection platform is fluctuated, flickering target value and the fluctuation, and, the feedback of flickering
Value carries out PI adjusting processing, is fluctuated and flickering standard of compensation reference value；
According to the inverter side current feedback values to the fluctuation, and, flickering standard of compensation reference value carries out clipping and repairs
Positive processing, is fluctuated and flickering standard of compensation value；
The fluctuation of new energy grid adaptability detection platform is calculated according to the grid side active power feedback value, and,
Flickering system compensation value；
The value that the given fluctuation of the fluctuation and flickering standard of compensation value and flickering instruction a reference value are added,
It makes the difference, is fluctuated and flickering instruction value with the fluctuation and flickering system compensation value.
New energy grid adaptability detection platform inverter side voltage-target and the new energy grid adaptability are detected
Platform inverter side voltage feedback value carries out PI adjusting processing, obtains new energy grid adaptability detection platform inverter side voltage close loop
Reference value；
The new energy grid adaptability detection platform inverter side voltage is calculated according to the inverter side current feedback values to close
Ring offset；
The closed loop reference value is added with closed loop compensation value, obtains closed loop instruction value；
According to closed loop instruction value and flickering instruction value, output voltage instruction value is calculated；
By the way that output voltage instruction value is input to new energy grid adaptability detection platform inversion side controller, make new energy
Source grid adaptability detection platform inversion side controller modulates pulse according to the output that the output voltage instruction value adjusts inverter side,
To realize that output voltage follows fluctuation and the response of flickering controlling value.
It is selectable, the inverter side voltage feedback value for obtaining new energy grid adaptability detection platform, inverter side electricity
Stream value of feedback and the step of inverter side phase angle locking phase Reflector include:
Obtain the inverter side voltage and inverter side electric current of the high-voltage terminal cabinet of the new energy grid adaptability detection platform；
The inverter side voltage of the high-voltage terminal cabinet is calculated through CAP_SPLL phaselocked loop, obtains the inverter side voltage
Phase angle and inverter side phase angle locking phase Reflector.
It is selectable, the grid side voltage feedback value for obtaining new energy grid adaptability detection platform, grid side electricity
The step of flowing value of feedback and grid side phase angle locking phase Reflector, calculating the active power feedback value of grid side include:
Obtain the network voltage and power network current of the High-voltage Incoming Cabinet of the new energy grid adaptability detection platform；
The network voltage of the high-voltage terminal cabinet is calculated through CAP_SPLL phaselocked loop, obtains the phase of the network voltage
Angle and phase angle locking phase Reflector, the power network current of the high-voltage terminal cabinet is calculated through CAP_SPLL phaselocked loop, obtains institute
Phase angle and the phase angle locking phase Reflector of power network current are stated, and respectively to the network voltage and electricity of the high-voltage terminal cabinet
Net electric current carries out Clark transformation and DQ transformation, and transformed value carries out limit filtration, obtains network voltage value of feedback and power grid electricity
Flow value of feedback；
Electric network voltage phase angle locking phase Reflector and power network current phase angle locking phase Reflector subtract each other to obtain phase difference
Angle；
The cosine value of product and phase angle that network voltage value of feedback is multiplied with power network current value of feedback is mutually multiplied
To up time active power；
Up time active power is filtered to obtain the active power feedback value of grid side.
Selectable, the CAP_SPLL phaselocked loop calculates specifically:
Acquired voltage and current signal is sent into controller, and voltage is shaped as square-wave signal by controller, is sent into controller
FPGA, FPGA carry out pulse bandwidth filtering and phase angle shift, and the pulse after phase angle shift carries out locking phase, obtain phase angle 0；Acquired
Voltage and current signal is sent into controller, and controller AD sampling A/D chip samples voltage, and the value of sampling is sent to DSP and carries out software
SPLL obtains phase angle 1；Phase angle 1 and 0 takes difference to subtract each other with 0, is sent into PI closed-loop regulator, and output valve and phase angle 1 are summed
To phase angle.When the difference at phase angle 1 and 0 is more than setting value, phase angle locking phase Reflector sets 1.
It is selectable, it is described to new energy grid adaptability detection platform inverter side voltage feedback value according to preset fluctuation
And flicker frequency carries out FFT processing, is fluctuated and the step of virtual value of flickering includes:
Obtain inverter side voltage feedback value；
FFT calculating is carried out to voltage feedback value according to preset fluctuation and flicker frequency value, by the reality of the result of calculating
Portion and imaginary part carry out quadratic sum and open radical sign calculating, are fluctuated and flickering virtual value.
It is selectable, it is described to new energy grid adaptability detection platform fluctuation and flickering target value and it is described fluctuation with
And the value of feedback of flickering carries out PI adjusting processing, is fluctuated and flickering standard of compensation reference value, comprising:
The fluctuation and the fluctuation that acquires with this period of flickering target value and flickering value of feedback are subtracted each other, obtain first
Difference；
The fluctuation that this period is acquired, and, the fluctuation and flickering value of feedback phase that flickering value of feedback was acquired with the upper period
Subtract, obtains the second difference；
The difference of first difference and second difference is handled by pi regulator, obtains the fluctuation and sudden strain of a muscle
Become standard of compensation reference value.
It is selectable, the wave that new energy grid adaptability detection platform is calculated according to grid side active power feedback value
The step of dynamic and flickering system compensation value specifically:
According to formulaCalculate the fluctuation and flickering system compensation value；
The UvolaFor the fluctuation and flickering system compensation value, the x is penalty coefficient, is,For system induction reactance.
Selectable, described pair to new energy grid adaptability detection platform inverter side voltage-target and the new energy
Grid adaptability detection platform inverter side voltage feedback value carries out PI adjusting processing, obtains new energy grid adaptability detection platform
Inverter side voltage close loop reference value, comprising:
The inverter side voltage feedback value that the inverter side voltage-target is acquired with this period is subtracted each other, it is poor to obtain third
Value；
The inverter side voltage feedback value that the inverter side voltage feedback value that this period acquires was acquired with the upper period is subtracted each other, is obtained
4th difference；
The difference of the third difference and the 4th difference is handled by pi regulator, obtains the inverter side voltage
Closed loop reference value.
It is selectable, the new energy grid adaptability detection platform inversion is calculated according to the inverter side current feedback values
The step of side voltage close loop offset specifically:
According to formulaCalculate the fluctuation and flickering system compensation value；
The UcomFor the fluctuation and flickering system compensation value, the IinvElectric current is exported for inverter side, the x1 is
Penalty coefficient is,For system induction reactance.
It is selectable, it is added the closed loop reference value to obtain closed loop instruction value with closed loop compensation value, be instructed according to closed loop
The step of output voltage instruction value is calculated with flickering instruction value in value include:
The closed loop reference value is added to obtain closed loop instruction value with closed loop compensation value；
Closed loop instruction value * (1- (fluctuation and flickering instruction value * sinwt)/closed loop instruction value) obtains output voltage instruction
Value；
The wt is default fluctuation and flicker frequency
From the above technical scheme, the application, which has a try, shows a kind of grid adaptability detection platform voltage fluctuation and sudden strain of a muscle
Become control method, the technical solution shown in the embodiment of the present application, it is defeated that the application passes through the output voltage instruction value that will be calculated
Enter to new energy grid adaptability detection platform voltage inverter, makes new energy grid adaptability detection platform voltage inverter root
According to the output voltage of output voltage instruction value adjustment voltage inverter, to realize output voltage to fluctuation and flickering controlling value
Quickly accurate response follows.
Detailed description of the invention
It in order to more clearly explain the embodiment of the invention or the technical proposal in the existing technology, below will be to institute in embodiment
Attached drawing to be used is needed to be briefly described, it should be apparent that, the accompanying drawings in the following description is only some implementations of the invention
Example, for those of ordinary skill in the art, without creative efforts, can also obtain according to these attached drawings
Obtain other attached drawings.
Fig. 1 is new energy grid adaptability detection platform structural schematic diagram provided by the embodiments of the present application；
Fig. 2 is the output voltage control method process of new energy grid adaptability detection platform provided by the embodiments of the present application
Figure；
Fig. 3 is that the fluctuation and flickering provided by the embodiments of the present application to new energy grid adaptability detection platform carries out fastly
The schematic diagram of fast response control；
Fig. 4 is the inverter side voltage of acquisition high-voltage terminal cabinet provided by the embodiments of the present application and the process of inverter side electric current
Figure；
Fig. 5 is the flow chart of the voltage on line side and current on line side of acquisition High-voltage Incoming Cabinet provided by the embodiments of the present application；
Fig. 6 is that the inverter side voltage and current provided by the embodiments of the present application for calculating new energy grid adaptability detection platform is anti-
The flow chart of feedback value；
Fig. 7 is the voltage on line side current feedback provided by the embodiments of the present application for calculating new energy grid adaptability detection platform
The flow chart of value and net side active power；
Fig. 8 is CAP_SPLL phaselocked loop flow chart provided by the embodiments of the present application；
Fig. 9 is that PI provided by the embodiments of the present application adjusts processing schematic；
Figure 10 is new energy grid adaptability detection platform provided by the embodiments of the present application fluctuation and flickering instruction value control
Apparatus structure schematic diagram processed；
Figure 11 is new energy grid adaptability detection platform closed loop instruction value control device knot provided by the embodiments of the present application
Structure schematic diagram；
Figure 12 is new energy grid adaptability detection platform output voltage instruction value provided by the embodiments of the present application control dress
Set structural schematic diagram.
Specific embodiment
Following will be combined with the drawings in the embodiments of the present invention, and technical solution in the embodiment of the present invention carries out clear, complete
Whole description, it is clear that described embodiments are only a part of the embodiments of the present invention, instead of all the embodiments.It is based on
Embodiment in the present invention, it is obtained by those of ordinary skill in the art without making creative efforts every other
Embodiment shall fall within the protection scope of the present invention.
Fig. 1 is new energy grid adaptability detection platform structural schematic diagram provided by the embodiments of the present application, as shown in Figure 1,
New energy grid adaptability detection platform in the embodiment of the present application includes the high pressure inlet wire being connected with three-phase high-voltage input terminal
Cabinet, the voltage inverter being connected with High-voltage Incoming Cabinet output end, the high-voltage terminal cabinet being connected with voltage inverter output end,
High-voltage terminal cabinet is connect by cable with grid-connected converter.
Fig. 2 is a kind of grid adaptability detection platform voltage fluctuation provided by the embodiments of the present application and flickering control method
Flow chart, as shown in Fig. 2, the output voltage control method of the embodiment of the present application includes:
S1 obtains the inverter side voltage feedback value of new energy grid adaptability detection platform, inverter side current feedback values and inverse
Become side phase angle locking phase Reflector；
Grid side voltage feedback value, grid side current feedback values and the electricity of S2 acquisition new energy grid adaptability detection platform
Net side phase angle locking phase Reflector calculates the active power feedback value of grid side；
S3 is by new energy grid adaptability detection platform inverter side voltage feedback value, according to preset fluctuation and flickering frequency
Rate carries out FFT processing, is fluctuated and flickering value of feedback；
S4 fluctuates new energy grid adaptability detection platform, flickering target value and the fluctuation, and, the feedback of flickering
Value carries out PI adjusting processing, is fluctuated and flickering standard of compensation reference value；
S5 according to the inverter side current feedback values to the fluctuation, and, flickering standard of compensation reference value carry out clipping
Correcting process, is fluctuated and flickering standard of compensation value；
S6 calculates the fluctuation of new energy grid adaptability detection platform according to the grid side active power feedback value, with
And flickering system compensation value；
The given fluctuation of the fluctuation and flickering standard of compensation value and flickering instruction a reference value are added by S7
Value makes the difference with the fluctuation and flickering system compensation value, is fluctuated and flickering instruction value.
S8 examines new energy grid adaptability detection platform inverter side voltage-target and the new energy grid adaptability
It surveys platform inverter side voltage feedback value and carries out PI adjusting processing, obtain new energy grid adaptability detection platform inverter side voltage and close
Ring reference value；
S9 calculates the new energy grid adaptability detection platform inverter side voltage according to the inverter side current feedback values
Closed loop compensation value；
The closed loop reference value is added by S10 with closed loop compensation value, obtains closed loop instruction value；
Output voltage instruction value is calculated according to closed loop instruction value and flickering instruction value in S11；
S12 is made by the way that output voltage instruction value is input to new energy grid adaptability detection platform inversion side controller
New energy grid adaptability detection platform inversion side controller is modulated according to the output that the output voltage instruction value adjusts inverter side
Pulse, to realize that output voltage follows fluctuation and the response of flickering controlling value.
Fig. 3 is that the fluctuation and flickering provided by the embodiments of the present application to new energy grid adaptability detection platform carries out fastly
The schematic diagram of fast response control, the content of the application as shown in connection with fig. 3 are described in detail suitable to new energy power grid by following proposal
The fluctuation and flickering of answering property detection platform carry out the process of fast-response control.
Wherein, the application by following proposal obtain new energy grid adaptability detection platform inverter side voltage feedback value and
Inverter side current feedback values, grid side voltage feedback value, grid side current feedback values and grid side active power, fluctuation and
Flickering value of feedback:
Firstly, obtaining the inverter side voltage and inverter side electricity of the high-voltage terminal cabinet of new energy grid adaptability detection platform
Stream.
Fig. 4 is the flow chart of the output voltage and output voltage of acquisition high-voltage terminal cabinet provided by the embodiments of the present application, such as
Shown in Fig. 4, the embodiment of the present application installs voltage sample PT in the high-voltage terminal cabinet of new energy grid adaptability detection platform
(Potential Transformer, voltage transformer) and current Hall CT (Current Hall, current Hall sensor),
Voltage sample PT reduces the inverter side initial voltage of high-voltage terminal cabinet, is sent to signal processor after obtaining secondary voltage signal
It is adjusted, voltage signal adjusted is sent to master controller and calculated by signal processor, obtains inverter side voltage value；
Current sampling Hall begins inverter side current reduction according to the no-load voltage ratio of setting, is sent to signal processing after obtaining secondary current signal
Device is adjusted, and current signal adjusted is sent to master controller and calculated by signal processor, obtains inverter side electric current
Value.
Secondly, obtaining the grid side voltage and grid side electricity of the High-voltage Incoming Cabinet of new energy grid adaptability detection platform
Stream.
Fig. 5 is the grid side voltage of acquisition High-voltage Incoming Cabinet provided by the embodiments of the present application and the process of grid side electric current
Figure, as shown in figure 5, the embodiment of the present application installs voltage sample in the high-voltage terminal cabinet of new energy grid adaptability detection platform
PT (Potential Transformer, voltage transformer) and current Hall CT (Current Transformer, current sense
Device), voltage sample PT reduces the grid side initial voltage of High-voltage Incoming Cabinet, is sent at signal after obtaining secondary voltage signal
Reason device is adjusted, and voltage signal adjusted is sent to master controller and calculated by signal processor, obtains grid side electricity
Pressure value；Current sample sensor reduces grid side initial current according to the no-load voltage ratio of setting, sends after obtaining secondary current signal
It is adjusted to signal processor, current signal adjusted is sent to master controller and calculated by signal processor, is obtained
Grid side current value.
Fig. 6 is the flow chart provided by the embodiments of the present application for calculating inverter side voltage, current feedback values, as shown in fig. 6, will
Pass through CAP_SPLL phaselocked loop calculation processing shown in Fig. 8 by the inverter side voltage that Fig. 4 is calculated, and will be calculated by Fig. 4
Inverter side voltage and current carry out Clarke CLARK conversion process, the phase angle and Clarke CLARK of output voltage will be obtained
Inverter side voltage, the electric current of transformation carry out DQ conversion process, obtain inverter side voltage feedback value and inverter side current feedback values.It is inverse
Become side voltage feedback value and FFT calculating is carried out according to preset fluctuation and flicker frequency, is fluctuated and flickering value of feedback.
Fig. 7 is the flow chart provided by the embodiments of the present application for calculating grid side voltage, current feedback values, as shown in fig. 7, will
Pass through CAP_SPLL phaselocked loop calculation processing shown in Fig. 8 respectively by the grid side voltage and current that Fig. 5 is calculated, and will pass through
Grid side voltage, the electric current of Fig. 5 calculating carry out Clarke CLARK conversion process, will obtain the phase angle of grid side voltage and current
Degree and the grid side voltage and current of Clarke CLARK transformation carry out DQ conversion process, obtain grid side voltage feedback value and inversion
Side current feedback values.By voltage locking phase angle and electric current locking phase angle subtract each other to obtain phase angle difference, voltage feedback value and current feedback values with
And the cosine value of phase angle difference is multiplied to obtain grid side active power.
In the inverter side voltage feedback value and inverter side current feedback values, wave for obtaining new energy grid adaptability detection platform
After dynamic and flickering value of feedback, grid side voltage feedback value, grid side current feedback values and grid side active power, this Shen
Please embodiment will fluctuate and the fluctuation that acquires with this period of flickering target value and flickering value of feedback are subtracted each other, it is poor to obtain first
Value；The fluctuation that this period acquires and the fluctuation that flickering value of feedback was acquired with the upper period and flickering value of feedback are subtracted each other, obtained
Second difference；The difference of first difference and the second difference is handled by pi regulator, is fluctuated and value complement is fed back in flickering
Repay reference value.The inverter side voltage feedback value phase that the embodiment of the present application acquires inverter side voltage-target with this period
Subtract, obtains the first difference；The inverter side voltage feedback value of the inverter side voltage feedback value that this period is acquired and the acquisition of upper period
Subtract each other, obtains the second difference；The difference of first difference and the second difference is handled by pi regulator, is fluctuated and flickering
Value of feedback standard of compensation reference value.
Illustratively, Fig. 9 be PI provided by the embodiments of the present application adjust processing schematic, as shown in figure 9, by target value with
The value of feedback of this period acquisition subtracts each other to obtain third difference e n, the value of feedback of the value of feedback that this period is acquired and the acquisition of upper period
Subtract each other to obtain the 4th difference e n1, PI adjusting is carried out to the difference e n-en1 of third difference e n and the 4th difference e n1, is exported
Standard of compensation reference value.
In the inverter side voltage feedback value and inverter side current feedback values, wave for obtaining new energy grid adaptability detection platform
After after dynamic and flickering value of feedback, grid side voltage feedback value, grid side current feedback values and grid side active power,
The embodiment of the present application is less than current threshold in inverter side electric current, sets the amplitude of fluctuation and flickering standard of compensation reference value to
Otherwise amplitude predetermined value when being no more than upper limit value, does not carry out clipping to the voltage magnitude of output voltage compensation reference value
Amendment, i.e., will fluctuation and flickering standard of compensation reference value as new energy grid adaptability detection platform standard of compensation value, into
Row subsequent processing.
Figure 10 is new energy grid adaptability detection platform provided by the embodiments of the present application fluctuation and flickering control device
Structural schematic diagram, as shown in Figure 10, the fluctuation of the embodiment of the present application and flickering control device include:
Voltage and current calculates unit 100, for calculating the inverter side Voltage Feedback of new energy grid adaptability detection platform
Value, inverter side current feedback values, fluctuation and flickering value of feedback；
PI processing unit 101, for the fluctuation and flickering target value to new energy grid adaptability detection platform and newly
The fluctuation of energy grid adaptability detection platform and flickering value of feedback carry out PI adjusting processing, obtain new energy grid adaptability
The fluctuation and flickering standard of compensation reference value of detection platform；
Amplitude correction unit 102, for being referred to according to input current value of feedback to the fluctuation and flickering standard of compensation
Value carries out clipping correcting process, is fluctuated and flickering standard of compensation value；
Compensating unit 103, for calculating the offset of fluctuation and flickering according to inverter side current feedback values；
Command value computing unit 104, for fluctuation and flickering that the fluctuation and flickering standard of compensation value is given
A reference value is instructed to be added, obtained value subtracts the fluctuation and flickering system compensation value is fluctuated and flickering instruction value.
Figure 11 is new energy grid adaptability detection platform closed loop instruction value control device knot provided by the embodiments of the present application
Structure schematic diagram, as shown in figure 11, the closed loop instruction value control device of the embodiment of the present application includes:
First voltage current calculation unit 110, for calculating the inverter side voltage of new energy grid adaptability detection platform
Value of feedback and inverter side current feedback values；
First PI processing unit 111, for new energy grid adaptability detection platform inverter side voltage-target and
The inverter side voltage feedback value of new energy grid adaptability detection platform carries out PI adjusting processing, obtains new energy grid adaptability
The inverter side voltage close loop reference value of detection platform；
First compensating unit 112, for calculating new energy grid adaptability detection platform according to grid side Feedback of Power value
Inverter side system compensation value；
First read group total unit 113 obtains closed loop instruction for the closed loop reference value to be added with closed loop compensation value
Value.
Figure 12 is new energy grid adaptability detection platform output voltage instruction value provided by the embodiments of the present application control dress
Set structural schematic diagram.
Closed loop instruction value 121 and harmonic wave and disturbance instruction value 122 are sent into voltage computation unit 123 and output electricity are calculated
Press instruction value.The output voltage instruction value being calculated is input to the control of new energy grid adaptability detection platform inverter side
Device makes new energy grid adaptability detection platform inversion side controller adjust the output of inverter side according to the output voltage instruction value
Pulse is modulated, to realize that output voltage follows fluctuation and the response of flickering controlling value.
The calculating process of voltage computation unit: closed loop instruction value * (1- (fluctuation and flickering instruction value * sinwt)/closed loop
Instruction value).
The specific working mode of each unit of the application Installation practice may refer to the present processes embodiment.
For the ease of clearly describing the technical solution of the embodiment of the present application, in the embodiment of invention, use " first ",
Printed words such as " second " distinguish function and the essentially identical identical entry of effect or similar item, and those skilled in the art can manage
The printed words such as solution " first ", " second " are not defined quantity and execution order.
The above, the only specific embodiment of the application, under the above-mentioned introduction of the application, those skilled in the art
Other improvement or deformation can be carried out on the basis of the above embodiments.It will be understood by those skilled in the art that above-mentioned tool
The purpose of the application is only preferably explained in body description, and the protection scope of the application should be subject to the protection scope in claims.
Claims (10)
1. a kind of grid adaptability detection platform voltage fluctuation and flickering control method, which is characterized in that the described method includes:
Obtain inverter side voltage feedback value, inverter side current feedback values and the inverter side phase of new energy grid adaptability detection platform
Parallactic angle locking phase Reflector；
Obtain grid side voltage feedback value, grid side current feedback values and the grid side phase of new energy grid adaptability detection platform
Parallactic angle locking phase Reflector calculates the active power feedback value of grid side；
By new energy grid adaptability detection platform inverter side voltage feedback value, carried out according to preset fluctuation and flicker frequency
FFT processing, is fluctuated and flickering value of feedback；
New energy grid adaptability detection platform is fluctuated, flickering target value and the fluctuation, and, the value of feedback of flickering, into
Row PI adjusting processing, is fluctuated and flickering standard of compensation reference value；
According to the inverter side current feedback values to the fluctuation, and, flickering standard of compensation reference value carries out clipping Corrections Division
Reason, is fluctuated and flickering standard of compensation value；
The fluctuation of new energy grid adaptability detection platform is calculated according to the grid side active power feedback value, and, flickering
System compensation value；
The value that the given fluctuation of the fluctuation and flickering standard of compensation value and flickering instruction a reference value are added, with institute
It states fluctuation and flickering system compensation value makes the difference, fluctuated and flickering instruction value；
To new energy grid adaptability detection platform inverter side voltage-target and the new energy grid adaptability detection platform
Inverter side voltage feedback value carries out PI adjusting processing, obtains the reference of new energy grid adaptability detection platform inverter side voltage close loop
Value；
The new energy grid adaptability detection platform inverter side voltage close loop is calculated according to the inverter side current feedback values to mend
Repay value；
The closed loop reference value is added with closed loop compensation value, obtains closed loop instruction value；
According to closed loop instruction value and flickering instruction value, output voltage instruction value is calculated；
By the way that output voltage instruction value is input to new energy grid adaptability detection platform inversion side controller, keep new energy electric
Net adaptive detection platform inversion side controller modulates pulse according to the output that the output voltage instruction value adjusts inverter side, with reality
Existing output voltage follows fluctuation and the response of flickering controlling value.
2. voltage fluctuation according to claim 1 and flickering control method, which is characterized in that the acquisition new energy electricity
Inverter side voltage feedback value, inverter side current feedback values and the inverter side phase angle locking phase Reflector of net adaptive detection platform
The step of include:
Obtain the inverter side voltage and inverter side electric current of the high-voltage terminal cabinet of the new energy grid adaptability detection platform；
The inverter side voltage of the high-voltage terminal cabinet is calculated through CAP_SPLL phaselocked loop, obtains the phase of the inverter side voltage
Angle and inverter side phase angle locking phase Reflector.
3. voltage fluctuation according to claim 2 and flickering control method, which is characterized in that the acquisition new energy electricity
Grid side voltage feedback value, grid side current feedback values and the grid side phase angle locking phase failure mark of net adaptive detection platform
Will, the step of calculating the active power feedback value of grid side include:
Obtain the network voltage and power network current of the High-voltage Incoming Cabinet of the new energy grid adaptability detection platform；
The network voltage of the high-voltage terminal cabinet is calculated through CAP_SPLL phaselocked loop, obtain the network voltage phase angle and
The power network current of the high-voltage terminal cabinet is calculated through CAP_SPLL phaselocked loop, obtains the electricity by phase angle locking phase Reflector
The phase angle of net electric current and phase angle locking phase Reflector, and the network voltage to the high-voltage terminal cabinet and power grid electricity respectively
Stream carries out Clark transformation and DQ transformation, and transformed value carries out limit filtration, obtains network voltage value of feedback and power network current is anti-
Feedback value；
Electric network voltage phase angle locking phase Reflector and power network current phase angle locking phase Reflector subtract each other to obtain phase angle；
The product that network voltage value of feedback is multiplied with power network current value of feedback is multiplied to obtain suitable with the cosine value of phase angle
When active power；
Up time active power is filtered to obtain the active power feedback value of grid side.
4. voltage fluctuation according to claim 3 and flickering control method, which is characterized in that the CAP_SPLL locking phase
Ring calculates specifically:
Acquired voltage and current signal is sent into controller, and voltage is shaped as square-wave signal by controller, is sent into controller FPGA,
FPGA carries out pulse bandwidth filtering and phase angle shift, and the pulse after phase angle shift carries out locking phase, obtains phase angle 0；Acquired voltage
Current signal is sent into controller, and controller AD sampling A/D chip samples voltage, and the value of sampling is sent to DSP and carries out software
SPLL obtains phase angle 1；Phase angle 1 and 0 takes difference to subtract each other with 0, is sent into PI closed-loop regulator, and output valve and phase angle 1 are summed
To phase angle；When the difference at phase angle 1 and 0 is more than setting value, phase angle locking phase Reflector sets 1.
5. voltage fluctuation according to claim 4 and flickering control method, which is characterized in that described to new energy power grid
Adaptive detection platform inverter side voltage feedback value carries out FFT processing according to preset fluctuation and flicker frequency, is fluctuated
And flickering virtual value the step of include:
Obtain inverter side voltage feedback value；
FFT calculating is carried out to voltage feedback value according to preset fluctuation and flicker frequency value, by the real part of the result of calculating and
Imaginary part carries out quadratic sum and opens radical sign calculating, is fluctuated and flickering virtual value.
6. voltage fluctuation according to claim 5 and flickering control method, which is characterized in that described to new energy power grid
The fluctuation of adaptive detection platform and flickering target value and the value of feedback of the fluctuation and flickering carry out PI adjusting processing, obtain
Fluctuation and flickering standard of compensation reference value, comprising:
The fluctuation and the fluctuation that acquires with this period of flickering target value and flickering value of feedback are subtracted each other, it is poor to obtain first
Value；
The fluctuation that this period is acquired, and, the fluctuation and flickering value of feedback that flickering value of feedback was acquired with the upper period are subtracted each other, and are obtained
To the second difference；
The difference of first difference and second difference is handled by pi regulator, the fluctuation is obtained and flickering is mended
Repay reference value.
7. voltage fluctuation according to claim 6 and flickering control method, which is characterized in that described to be had according to grid side
Function Feedback of Power value calculates the step of fluctuation and flickering system compensation value of new energy grid adaptability detection platform specifically:
According to formulaCalculate the fluctuation and flickering system compensation value；
Wherein, the UvolaFor the fluctuation and flickering system compensation value, the x is penalty coefficient, is,For system sense
It is anti-.
8. voltage fluctuation according to claim 7 and flickering control method, which is characterized in that described pair to new energy electricity
Net adaptive detection platform inverter side voltage-target and the new energy grid adaptability detection platform inverter side Voltage Feedback
Value carries out PI adjusting processing, obtains new energy grid adaptability detection platform inverter side voltage close loop reference value, comprising:
The inverter side voltage feedback value that the inverter side voltage-target is acquired with this period is subtracted each other, third difference is obtained；
The inverter side voltage feedback value that the inverter side voltage feedback value that this period acquires was acquired with the upper period is subtracted each other, obtains the 4th
Difference；
The difference of the third difference and the 4th difference is handled by pi regulator, obtains the inverter side voltage close loop
Reference value.
9. voltage fluctuation according to claim 8 and flickering control method, which is characterized in that according to the inverter side electricity
Flow the step of value of feedback calculates the new energy grid adaptability detection platform inverter side voltage close loop offset specifically:
According to formulaCalculate the fluctuation and flickering system compensation value；
Wherein, the UcomFor the fluctuation and flickering system compensation value, the IinvElectric current is exported for inverter side, the x1 is
Penalty coefficient is,For system induction reactance.
10. voltage fluctuation according to claim 9 and flickering control method, which is characterized in that by the closed loop reference
Value is added to obtain closed loop instruction value with closed loop compensation value, and output voltage is calculated with flickering instruction value according to closed loop instruction value and refers to
The step of enabling value include:
The closed loop reference value is added to obtain closed loop instruction value with closed loop compensation value；
Closed loop instruction value * (1- (fluctuation and flickering instruction value * sinwt)/closed loop instruction value) obtains output voltage instruction value；
Wherein, the wt is default fluctuation and flicker frequency.
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