CN108767904A - A kind of virtual synchronous generator control method based on auto-disturbance rejection technology - Google Patents
A kind of virtual synchronous generator control method based on auto-disturbance rejection technology Download PDFInfo
- Publication number
- CN108767904A CN108767904A CN201810570494.5A CN201810570494A CN108767904A CN 108767904 A CN108767904 A CN 108767904A CN 201810570494 A CN201810570494 A CN 201810570494A CN 108767904 A CN108767904 A CN 108767904A
- Authority
- CN
- China
- Prior art keywords
- disturbance rejection
- auto
- virtual synchronous
- control method
- voltage
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Pending
Links
Classifications
-
- 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
-
- 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
- H02J3/381—Dispersed generators
-
- 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
Landscapes
- Engineering & Computer Science (AREA)
- Power Engineering (AREA)
- Control Of Eletrric Generators (AREA)
Abstract
It is disclosed herein a kind of by auto-disturbance rejection technology (Active Disturbance Rejection Control,) and virtual synchronous generator techniques (Virtual Synchronous Generater ADRC, VSG the novel control mode) being combined, i.e. the virtual synchronous machine control method based on auto-disturbance rejection technology.The control method includes:Main circuit, rotor vacillation equation, single order Active Disturbance Rejection Control system, excitation equation, voltage and current ring, SVPWM modules, load.The present invention changes the rotor equation of traditional virtual synchronous machine, and new rotor equation is provided in conjunction with auto-disturbance rejection technology.Under islet operation, under big load disturbance impact, better Ability of Resisting Disturbance is embodied, has frequency fluctuation smooth, the small advantage of variable quantity.
Description
Technical field
The present invention proposes a kind of virtual synchronous generator control method based on auto-disturbance rejection technology, and it is micro- to be related to distributed power generation
Net control field
Background technology
Virtual synchronous generator imitates the external characteristics of generator, while capable of carrying out common droop control, to microgrid
Certain inertia and the novel reverse control technology of damping are provided, VSG possesses the spy of general distributed energy control plug and play
Property, you can to switch between isolated island and grid-connected both of which.
Since grid-connected period is influenced by bulk power grid characteristic, the frequency and voltage of whole system are clamped down on by power grid, and VSG is not
It is supported to system into line frequency；Under island mode, VSG needs to provide the support of voltage and frequency, therefore scholar to whole system
General take change load under isolated island situation the characteristic in terms of VSG rotor inertias and frequency studied.
Some scholars are improved rotor equation on the basis of original, such as based on adaptive algorithm, pass through certain number
Method allows inertia coeffeicent and damped coefficient to change as load changes, and then reduces the fluctuation of frequency, but this
Mode keeps system response slack-off, and load is changed with coefficient by certain relationship, and precision is short of；Also some scholars use
Pattern switching, rotor equation and the other modes of VSG switch, are controlled frequency by two stages, but control more numerous
Trivial, when pattern switching, can attract additional disturbance, be unfavorable for system stabilization, to sum up, the prior art slightly has the control of frequency
It is insufficient.
Invention content
The object of the present invention is to provide a kind of novel VSG control modes to anti-disturbance, when load has fluctuation
In the case where not changing original parameter, reduce the fluctuation of frequency as far as possible, and still retains the characteristic of inertia and damping.
To achieve the above object, the present invention proposes a kind of virtual synchronous generator control method based on auto-disturbance rejection technology,
The control method includes:Main circuit, rotor vacillation equation, single order Active Disturbance Rejection Control system, excitation equation, voltage and current ring,
SVPWM modules, load.
The main circuit replaces distributed solar energy cell array, 6 groups of IGBT and fly-wheel diode group using DC power supply
At inverter, using LCL filter circuits, a local load and perturbation load.
Rated frequency is set as setting value by the rotor vacillation equation, accesses the single order Active Disturbance Rejection Control system afterwards, even
Connect control object.
The single order Active Disturbance Rejection Control system, feature include taking the Nonlinear Tracking Differentiator TD of compensation prediction measure, expansion
State observer ESO, nonlinearity erron Feedback Control Laws NLSEF and control object.
The differentiator does not include the differentiator for taking compensation prediction measure, and setting value accesses the input terminal of TD, obtains and set
The output signal of single order active disturbance rejection system is sent into the ESO and analyzed, obtains estimating for output signal by the transitional processes of definite value
Evaluation Z1With total disturbance Z2, TD output ends and Z1It makes the difference and obtains signal e1, by signal e1It is sent into the NLSEF and carries out non-linear group
Close, obtain uncompensated control signal, then with Z2With constant coefficient b0Product makes the difference, and show that control signal is sent to control object, described
Control object obtains system frequency using P-f droop controls.
The excitation equation obtains excitation voltage using Q-u droop controls.
The Current Voltage ring, takes capacitance voltage and inductive current in systems, is carried out to capacitance voltage and current inductance
Dq decouplings are decomposed, and dq0 decouplings selection is with the standard that d axis is that 1, q axis is 0；The excitation voltage is d axis setting values, takes the constant 0 to be
Q axis setting values, make the difference with the capacitance voltage decomposed into PID controller afterwards, form the Voltage loop, obtain setting for electric current loop
Definite value makes the difference with the inductive current decomposed obtain voltage value into PID controller afterwards, then is added with the capacitance voltage decomposed,
Combined circuit impedance generates new three-phase voltage, is sent into SVPWM.
The three-phase voltage that Current Voltage ring generates is sent into SVPWM and obtains impulse modulation, finally sent by the SVPWM modules
Enter inverter.
The local load, using active load.
The present invention provides the scheme of the influence about load disturbance to VSG frequencies, and the scheme includes：VSG runs isolated island
Pattern, load is using an active local load and a perturbation load；After running a period of time, it is negative to access a disturbance
It carries, the frequency fluctuation of analysis rotor output is compared with traditional VSG, embodies advantage of the present invention in terms of frequency fluctuation.
Description of the drawings
It, below will be to required in embodiment in order to clearly demonstrate the embodiment of the present invention or technical solution in the prior art
Attached drawing to be used is briefly described, and drawings in the following description are only some embodiments of the invention, for this field
For those of ordinary skill, without having to pay creative labor, it can also be obtained according to these attached drawings other attached
Figure.
Fig. 1 is a kind of knot for virtual synchronous generator control method based on auto-disturbance rejection technology that the embodiment of the present invention proposes
Composition；
Fig. 2 is rotor vacillation equation structure chart of the embodiment of the present invention；
Fig. 3 is ADRC structure charts of the embodiment of the present invention；
Fig. 4 is excitation equation structure chart of the embodiment of the present invention；
Fig. 5 is forcing frequency of embodiment of the present invention curve and tradition VSG frequency curve comparison diagrams.
Specific implementation mode
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
Site preparation describes, it is clear that described embodiments are only a part of the embodiments of the present invention, instead of all the embodiments, 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 belongs to the range of the protection of the present invention.
The purpose of the present invention is to propose to a kind of virtual synchronous generator control method based on auto-disturbance rejection technology, is deposited in load
In fluctuation, in the case where not changing original parameter, reduce the fluctuation of frequency as far as possible, and still retain inertia and damping
Characteristic,
In order to make the foregoing objectives, features and advantages of the present invention clearer and more comprehensible, below in conjunction with the accompanying drawings to the present invention do into
One step is described in detail.
A kind of structure chart for virtual synchronous generator control method based on auto-disturbance rejection technology that the embodiment of the present invention proposes,
UdcTo replace the DC power supply, 6 groups of IGBT and fly-wheel diode of distributed solar energy cell array to form inverter, L1It is first
Filter inductance, R1With resistance, C it is filter capacitor, L for filter inductance2It locally loads and has for the second filter inductance, active 1W
Work(5W perturbation loads.
Fig. 2 is rotor vacillation equation structure chart of the embodiment of the present invention, and power grid rated frequency fs is set as setting value, rear to access
The single order Active Disturbance Rejection Control system connects control object, improves rotor vacillation equation：
In formula,For ADRC export controlled quentity controlled variable, Pe be system wattful power messurement value, J is inertia coeffeicent, Dp be damped coefficient,
For system frequency,For rated frequency, coefficient of correspondence value in figure, K1=1/200π2、K2=1/J、K3=2π。
Fig. 3 is ADRC structure charts of the embodiment of the present invention, and the Active Disturbance Rejection Control system, feature includes taking compensation prediction
Nonlinear Tracking Differentiator TD, extended state observer ESO, nonlinearity erron Feedback Control Laws NLSEF and the control object of measure, control
Object is to improve rotor vacillation equation, design calculation formula：
In formula, fhan be time-optimal control comprehensive function,For through transitional processes obtained quantity,For setting value, r0It is velocity factor, h
It is integration step, Z1For the estimated value for control object output quantity, Z2For for total disturbance of control object output quantity, e1For
The estimated value of control object output quantity and the difference of actual value,WithFor one group of parameter to be adjusted,For do not compensate controlled quentity controlled variable,It is
The controlled quentity controlled variable of Active Disturbance Rejection Control final output, r are feedback parameter, b0Normal parameter, y object output quantity in order to control, wherein each parameter
Take following value：
In figure, K4=、K5=b0。
Fig. 4 is excitation equation structure chart of the embodiment of the present invention, excitation equation：
QsetFor idle setting value, QeFor system reactive power measured value, DqFor the sagging coefficient of reactive voltage, U0Have for output voltage
Valid value, UnFor rated voltage virtual value, K be gain coefficient, E is excitation voltage.
Fig. 5 is forcing frequency of embodiment of the present invention curve and tradition VSG frequency curve comparison diagrams, under Simulink platforms
Concrete model is built, the entire duration that emulates takes 1 second, to embody the disturbance rejection superperformance of the present invention, in 0.3 second to 0.35 second
Put into 6W perturbation loads, the frequency fluctuation of observation tradition VSG and the present invention；Red line indicates tradition VSG frequency fluctuation curves, it is seen that
Reach 44,7H when frequency fluctuation is minimumZ, frequency fluctuation is larger；Blue line indicates ADRCVSG frequency fluctuations curve of the present invention, it is seen that
Reach 49.4H when frequency fluctuation is minimumZ, frequency fluctuation is very small, and present invention advantage in terms of anti-frequency fluctuation is apparent.
Specific case used herein is expounded the principle of the present invention and embodiment, and above example is said
The bright method and its core concept for being merely used to help understand the present invention, meanwhile, for those of ordinary skill in the art, foundation
The thought of the present invention can change place, in conclusion the content of the present specification is not answered in specific embodiments and applications
It is interpreted as the limitation of the present invention.
Claims (10)
1. the present invention proposes a kind of virtual synchronous generator control method based on auto-disturbance rejection technology, which is characterized in that the control
Method processed includes:Main circuit, rotor vacillation equation, single order Active Disturbance Rejection Control system, excitation equation, voltage and current ring, SVPWM moulds
Block, load.
2. a kind of virtual synchronous generator control method based on auto-disturbance rejection technology according to claim 1, feature exist
In the main circuit replaces distributed solar energy cell array, 6 groups of IGBT and fly-wheel diode composition inverse using DC power supply
Become device, using LCL filter circuits, a local load and perturbation load.
3. a kind of virtual synchronous generator control method based on auto-disturbance rejection technology according to claim 1, feature exist
In rated frequency is set as setting value by the rotor vacillation equation, accesses the single order Active Disturbance Rejection Control system, connection control afterwards
Object processed, the single order Active Disturbance Rejection Control system, feature include taking the Nonlinear Tracking Differentiator TD of compensation prediction measure, expansion shape
State observer ESO, nonlinearity erron Feedback Control Laws NLSEF and control object.
4. a kind of virtual synchronous generator control method based on auto-disturbance rejection technology according to claim 1, feature exist
In the differentiator does not include the differentiator for taking compensation prediction measure, and setting value accesses the input terminal of TD, obtains setting value
The output signal of single order active disturbance rejection system is sent into the ESO and analyzed, obtains the estimated value Z of output signal by transitional processes1
With total disturbance Z2, TD output ends and Z1It makes the difference and obtains signal e1, by signal e1It is sent into the NLSEF and carries out nonlinear combination, obtain
Uncompensated control signal, then with Z2With constant coefficient b0Product makes the difference, and show that control signal is sent to control object.
5. a kind of virtual synchronous generator control method based on auto-disturbance rejection technology according to claim 1, feature exist
In the control object obtains system frequency using P-f droop controls.
6. a kind of virtual synchronous generator control method based on auto-disturbance rejection technology according to claim 1, feature exist
In the excitation equation obtains excitation voltage using Q-u droop controls.
7. a kind of virtual synchronous generator control method based on auto-disturbance rejection technology according to claim 1, feature exist
In the Current Voltage ring takes capacitance voltage and inductive current in systems, and dq decouplings are carried out to capacitance voltage and current inductance
It decomposes, dq0 decouplings selection is with the standard that d axis is that 1, q axis is 0；The excitation voltage is d axis setting values, and it is that q axis is set to take constant 0
Definite value makes the difference with the capacitance voltage decomposed form the setting value that the Voltage loop obtains electric current loop into PID controller afterwards,
It is made the difference afterwards with the inductive current decomposed and obtains voltage value into PID controller, then be added with the capacitance voltage decomposed, bonding wire
The three-phase voltage of roadlock antibiosis Cheng Xin is sent into SVPWM.
8. a kind of virtual synchronous generator control method based on auto-disturbance rejection technology according to claim 1, feature exist
In the three-phase voltage that Current Voltage ring generates is sent into SVPWM and obtains impulse modulation, is finally sent into inversion by the SVPWM modules
Device.
9. a kind of virtual synchronous generator control method based on auto-disturbance rejection technology according to claim 1, feature exist
In the load, using active load.
10. a kind of scheme of influence about load disturbance to VSG frequencies, the method is applied to according to claim 1 to power
Profit requires 9 any one of them to be based on VSG control methods, and the scheme includes:VSG runs island mode, and load uses one
Active local load and a perturbation load；After running a period of time, a perturbation load, the frequency of analysis rotor output are accessed
Rate fluctuates, and is compared with traditional VSG, and advantage of the present invention in terms of frequency fluctuation is embodied.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810570494.5A CN108767904A (en) | 2018-06-05 | 2018-06-05 | A kind of virtual synchronous generator control method based on auto-disturbance rejection technology |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810570494.5A CN108767904A (en) | 2018-06-05 | 2018-06-05 | A kind of virtual synchronous generator control method based on auto-disturbance rejection technology |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN108767904A true CN108767904A (en) | 2018-11-06 |
Family
ID=64000077
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201810570494.5A Pending CN108767904A (en) | 2018-06-05 | 2018-06-05 | A kind of virtual synchronous generator control method based on auto-disturbance rejection technology |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN108767904A (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109687482A (en) * | 2019-02-01 | 2019-04-26 | 东南大学 | Towards the active oscillation damping control method of more virtual synchronous machine micro-capacitance sensors |
| CN109889113A (en) * | 2019-03-11 | 2019-06-14 | 中国科学院上海技术物理研究所 | A kind of magneto parameter scanning control system based on Active Disturbance Rejection Control |
-
2018
- 2018-06-05 CN CN201810570494.5A patent/CN108767904A/en active Pending
Non-Patent Citations (1)
| Title |
|---|
| 唐酿等: ""基于自抗扰控制技术的虚拟同步机无频差控制方法"", 《广东电力》 * |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109687482A (en) * | 2019-02-01 | 2019-04-26 | 东南大学 | Towards the active oscillation damping control method of more virtual synchronous machine micro-capacitance sensors |
| CN109687482B (en) * | 2019-02-01 | 2021-07-20 | 东南大学溧阳研究院 | Active oscillation damping control method for micro-grid of multiple virtual synchronous machines |
| CN109889113A (en) * | 2019-03-11 | 2019-06-14 | 中国科学院上海技术物理研究所 | A kind of magneto parameter scanning control system based on Active Disturbance Rejection Control |
| CN109889113B (en) * | 2019-03-11 | 2023-11-07 | 中国科学院上海技术物理研究所 | Permanent magnet motor variable speed scanning control system based on active disturbance rejection control |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| Wu et al. | Parameter design oriented analysis of the current control stability of the weak-grid-tied VSC | |
| CN107453412B (en) | Based on VSG control device and method, more VSG presynchronization combination methods | |
| CN111541274A (en) | Island microgrid control strategy based on virtual synchronous generator characteristics | |
| Dashtdar et al. | Improving the power quality of island microgrid with voltage and frequency control based on a hybrid genetic algorithm and PSO | |
| CN106786733A (en) | A kind of control method, the apparatus and system of virtual synchronous generator | |
| Babu et al. | Investigation of damping effect of PLL on low-frequency harmonic stability of grid-tied inverter with αβ and dq current control schemes | |
| CN108767904A (en) | A kind of virtual synchronous generator control method based on auto-disturbance rejection technology | |
| Beus et al. | A model predictive control approach to operation optimization of an ultracapacitor bank for frequency control | |
| Mahdavi et al. | Fuzzy chopper-based load emulator for AUT microgrid | |
| Li et al. | Dynamic simulator for thyristor-controlled series capacitor | |
| Rangarajan et al. | Comparative impact assessment of filter elements associated with PWM and hysteresis controlled PV on network harmonic resonance in distribution systems | |
| Tabatabaei et al. | Damping function of back to back HVDC based voltage source converter | |
| CN115800319A (en) | Microgrid active disturbance rejection control method considering model compensation | |
| Tirtashi et al. | PSS and STATCOM controller design for damping power system oscillations using fuzzy control strategies | |
| Wong et al. | Reactive power sharing study of an islanded microgrid in DIgSILENT PowerFactory | |
| Dey et al. | Passivity based grid-connectivity criterion for ensuring stability of a network with controlled power injection devices | |
| Majumder et al. | Enhancing stability of an autonomous microgrid using a gain scheduled angle droop controller with derivative feedback | |
| Park et al. | Discrete-time adaptive sliding mode power system stabilizer with only input/output measurements | |
| Sahoo et al. | An improved UPFC control to enhance power system stability | |
| Jakpattanajit et al. | A new coordinated control scheme of PSS and FACT devices for improving power system oscillations in multi-machine system | |
| Fank et al. | Damping of inter-area oscillations by combining control strategies in hydropower plants. | |
| Kerdphol et al. | Virtual Inertia Synthesis for a Single-Area Power System | |
| CN108462209A (en) | Voltage to frequency one Robust Optimal Control method based on virtual synchronous generator | |
| De Bonis et al. | A review on the dynamic analysis of weak distribution networks | |
| Alawasa et al. | New approach to damp subsynchronous resonance by reshaping the output impedance of voltage-sourced converters |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| WD01 | Invention patent application deemed withdrawn after publication |
Application publication date: 20181106 |
|
| WD01 | Invention patent application deemed withdrawn after publication |