CN109490773A - A kind of virtual synchronous machine low voltage crossing characteristic test method, apparatus and system - Google Patents
A kind of virtual synchronous machine low voltage crossing characteristic test method, apparatus and system Download PDFInfo
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- CN109490773A CN109490773A CN201811268998.8A CN201811268998A CN109490773A CN 109490773 A CN109490773 A CN 109490773A CN 201811268998 A CN201811268998 A CN 201811268998A CN 109490773 A CN109490773 A CN 109490773A
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
- G01R31/00—Arrangements for testing electric properties; Arrangements for locating electric faults; Arrangements for electrical testing characterised by what is being tested not provided for elsewhere
- G01R31/34—Testing dynamo-electric machines
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- G—PHYSICS
- G06—COMPUTING; CALCULATING OR COUNTING
- G06F—ELECTRIC DIGITAL DATA PROCESSING
- G06F30/00—Computer-aided design [CAD]
- G06F30/30—Circuit design
- G06F30/36—Circuit design at the analogue level
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- G—PHYSICS
- G06—COMPUTING; CALCULATING OR COUNTING
- G06F—ELECTRIC DIGITAL DATA PROCESSING
- G06F30/00—Computer-aided design [CAD]
- G06F30/30—Circuit design
- G06F30/36—Circuit design at the analogue level
- G06F30/367—Design verification, e.g. using simulation, simulation program with integrated circuit emphasis [SPICE], direct methods or relaxation methods
Abstract
The invention discloses a kind of virtual synchronous machine low voltage crossing characteristic test methods, apparatus and system, the test to virtual synchronous machine low voltage crossing performance is realized by the test mode of hardware in loop (HIL), by receiving the drop depth parameter of the different moments of user's input, drop depth parameter is inputted into power system simulation model；Response of the virtual synchronous machine hardware circuit simulation model under different drop depths is obtained, generates the low voltage crossing characteristic curve of virtual synchronous machine according to response.By applying the present invention, being tested based on virtual synchronous machine simulation model, voltage class is not related to forceful electric power at ten volts or so during the test, highly-safe；Pass through real-time simulation power grid, change grid voltage amplitude flexibly, convenience is high, without true grid simulator or programmable alternating-current voltage source, low voltage crossing performance test can be completed to the virtual synchronous machine of different voltages, power grade, it is at low cost and can guarantee that test process will not damage the actual hardware of virtual synchronous machine.
Description
Technical field
The present invention relates in the field of test technology of virtual synchronous generator, and in particular to a kind of virtual synchronous machine low-voltage
Pass through characteristic test method, apparatus and system.
Background technique
Virtual synchronous machine simulates the characteristic of substantial synchronization generator, and frequency and voltage support can be provided for power grid, and
With active frequency modulation function.Extensive use with virtual synchronous generator in distributed power generation field, virtual synchronous machine and electricity
The reciprocal effect of net highlights increasingly.When grid voltage sags, if virtual synchronous generator does not have low voltage ride-through capability
The virtual synchronous generator that will lead to corresponding region is out of service, this can destroy the active power balance of power grid, seriously jeopardizes electricity
The safe and stable operation of net.Therefore, it is necessary to low voltage ride-through capability of effective test macro to virtual synchronous machine to detect.
Conventional low voltage test macro is mainly based upon grid simulator, and disadvantage lacks flexibility and safety, especially works as void
When quasi- synchronous machine power, voltage class are larger, it need to be correspondingly improved the power and voltage class of the grid simulator for test,
The cost of test can be greatly improved.
Summary of the invention
Therefore, the present invention provides a kind of virtual synchronous machine low voltage crossing characteristic test method, apparatus and system, overcomes
Lack flexibility and safety and defect at high cost using based on grid simulator in the prior art.
According in a first aspect, the embodiment of the invention provides a kind of virtual synchronous machine low voltage crossing characteristic test method,
The virtual synchronous machine simulation model includes: that the power grid respectively according to the building of the circuit structure of network system and virtual synchronous machine is imitative
True mode and virtual synchronous machine hardware circuit simulation model, the power system simulation model, virtual synchronous machine hardware circuit emulate mould
Type is sequentially connected with virtual synchronous machine controller；The test method includes: to receive different moments of user's input to fall depth
Parameter is spent, the drop depth parameter is inputted into the power system simulation model；Obtain the virtual synchronous machine hardware circuit emulation
Response of the model under different drop depths；According to virtual synchronous machine described in the response test.
Preferably, described according to the response test the step of virtual synchronous machine, comprising: to be generated according to the response
The low voltage crossing characteristic curve of the virtual synchronous machine；The low voltage crossing characteristic curve and default low voltage crossing is special
Linearity curve compares；According to comparing result judge the virtual synchronous machine low-voltage whether pass through characteristic qualified.
According to second aspect, a kind of virtual synchronous machine low voltage crossing characteristic test device of the embodiment of the present invention, the void
Quasi- synchronous machine simulation model includes: the power system simulation model constructed respectively according to the circuit structure of network system and virtual synchronous machine
And virtual synchronous machine hardware circuit simulation model, the power system simulation model, virtual synchronous machine hardware circuit simulation model and void
Quasi- synchronous machine controller is sequentially connected；The test device includes: drop depth parameter setting module, for receiving user's input
Different moments drop depth parameter, the drop depth parameter is inputted into the power system simulation model；Drop depth response
Module is obtained, for obtaining response of the virtual synchronous machine hardware circuit simulation model under different drop depths；Test
Module is used for the virtual synchronous machine according to the response test.
Preferably, the above-mentioned low voltage crossing test device based on virtual synchronous machine simulation model, the test module
It include: that low voltage crossing characteristic curve generates submodule, for generating the low-voltage of the virtual synchronous machine according to the response
Pass through characteristic curve；Curve comparison submodule is used for the low voltage crossing characteristic curve and default low voltage crossing characteristic
Curve compares；Judging submodule, for whether judging the virtual synchronous machine low voltage crossing characteristic according to comparing result
It is qualified.
According to the third aspect, a kind of virtual synchronous machine low voltage crossing characteristic test system, comprising: real-time simulation machine, void
Quasi- synchronous machine controller and above-mentioned test device, wherein the real-time simulation machine is for respectively according to network system and virtual
The power system simulation model and virtual synchronous machine hardware circuit simulation model of the circuit structure building of synchronous machine, the grid simulation mould
Type, virtual synchronous machine hardware circuit simulation model and virtual synchronous machine controller are sequentially connected, when according to the difference of user's input
The drop depth parameter at quarter runs the virtual synchronous machine hardware circuit simulation model and power system simulation model, output simulation letter
Number；The virtual synchronous machine controller exports analog signal according to the real-time simulation machine and according to default adjustable strategies, exports
Digital signal adjusts the operating status of virtual synchronous machine hardware circuit model described in the real-time simulation machine；The test device
Virtual synchronous machine is obtained according to the operating status of the operating status of virtual synchronous machine hardware circuit model described in real-time simulation machine
Response of the hardware circuit simulation model under different drop depths, and the virtual synchronous machine according to the response test.
Preferably, above-mentioned virtual synchronous machine low voltage crossing characteristic test system, further includes: signal regulating panel, it is described
Signal regulating panel is connected with the real-time simulation machine and virtual synchronous machine controller respectively, for according to the virtual synchronous machine
The magnitude range of the input signal of controller adjusts the analog signal of the real-time simulation machine output, and according to described imitative in real time
The magnitude range of prototype input signal adjusts the digital signal of the virtual synchronous machine controller output.
Preferably, the real-time simulation machine runs the power system simulation model and virtual synchronous machine hardware circuit emulates mould
Type records and shows power grid three-phase voltage, virtual synchronous generator terminal mouth three-phase voltage, virtual synchronous generator terminal mouth three-phase current, virtual
At least one of synchronous machine three-phase filter capacitor voltage, virtual synchronous machine inverter side three-phase current and DC voltage.
Preferably, the real-time simulation machine is also used to calculate, record and shows the virtual synchronous machine hardware circuit emulation
At least one of active power and reactive power of model.
Preferably, the virtual synchronous machine hardware circuit simulation model includes: DC power supply model, DC side filter capacitor
Model, three phase inverter bridge model are at least one of, LCL Three-phase electric-wave filter model and three-phase grid switch models.
Preferably, the power system simulation model includes programmable three-phase desired voltage source model and three phase line mould
At least one of type, wherein each phase voltage amplitude of the programmable three-phase desired voltage source model is set as time phase
Close function.
Preferably, the analog signal includes: virtual synchronous generator terminal mouth three-phase voltage, virtual synchronous generator terminal mouth three-phase electricity
In stream, virtual synchronous machine three-phase filter capacitor voltage, virtual synchronous machine inverter side three-phase current and DC voltage at least
One of.
Preferably, the digital signal includes: the pwm pulses letter that the virtual synchronous machine controller generates
Number and grid-connected switch control signal, wherein the pwm pulses signal is for controlling the simulation hardware circuit mould
The on-off of switching tube in type；The grid-connected switch control signal is used to control the logical of grid-connected switch in simulation hardware circuit model
It is disconnected.
According to fourth aspect, the embodiment of the present invention provides a kind of computer readable storage medium, described computer-readable to deposit
Storage media is stored with computer instruction, and the computer instruction is for making the computer execute the above-mentioned low electricity of virtual synchronous machine
Press to wear more characteristic test method.
Technical solution of the present invention has the advantages that
A kind of virtual synchronous machine low voltage crossing characteristic test method provided in an embodiment of the present invention, apparatus and system lead to
Test of the test mode realization of hardware in loop (HIL) to virtual synchronous machine low voltage crossing performance is crossed, it is defeated by receiving user
Drop depth parameter is inputted power system simulation model by the drop depth parameter of the different moments entered；Obtain virtual synchronous machine hardware
Response of the circuit simulation model under different drop depths, the low voltage crossing characteristic for generating virtual synchronous machine according to response are bent
Line.Voltage class is not related to forceful electric power at ten volts or so to method provided in an embodiment of the present invention during the test, highly-safe；
By real-time simulation power grid, change grid voltage amplitude flexibly, convenience is high, without true grid simulator or may be programmed
Alternating-current voltage source can complete low voltage crossing performance test, survey at low cost to the virtual synchronous machine of different voltages, power grade
Examination process will not damage the actual hardware of virtual synchronous machine.
Detailed description of the invention
It, below will be to specific in order to illustrate more clearly of the specific embodiment of the invention or technical solution in the prior art
Embodiment or attached drawing needed to be used in the description of the prior art be briefly described, it should be apparent that, it is described below
Attached drawing is some embodiments of the present invention, for those of ordinary skill in the art, before not making the creative labor
It puts, is also possible to obtain other drawings based on these drawings.
Fig. 1 is the stream of a specific example of virtual synchronous machine low voltage ride-through testing method provided in an embodiment of the present invention
Cheng Tu；
Fig. 2 specifically shows for another of virtual synchronous machine low voltage crossing characteristic test method provided in an embodiment of the present invention
The flow chart of example；
Fig. 3 is the low voltage crossing characteristic curve schematic diagram of wind power plant provided in an embodiment of the present invention；
Fig. 4 is a specific example of virtual synchronous machine low voltage crossing characteristic test device provided in an embodiment of the present invention
Schematic diagram；
Fig. 5 is a specific example of virtual synchronous machine low voltage crossing characteristic test system provided in an embodiment of the present invention
Composition figure；
Fig. 6 specifically shows for another of virtual synchronous machine low voltage crossing characteristic test system provided in an embodiment of the present invention
The composition figure of example.
Specific embodiment
Technical solution of the present invention is clearly and completely described below in conjunction with attached drawing, it is clear that described implementation
Example is a part of the embodiment of the present invention, instead of all the embodiments.Based on the embodiments of the present invention, ordinary skill
Personnel's every other embodiment obtained without making creative work, shall fall within the protection scope of the present invention.
As long as in addition, the non-structure each other of technical characteristic involved in invention described below different embodiments
It can be combined with each other at conflict.
Embodiment 1
The embodiment of the present invention provides a kind of virtual synchronous machine low voltage crossing characteristic test method, and the test method is based on
Virtual synchronous machine simulation model carries out, and virtual synchronous machine simulation model includes: respectively according to network system and virtual synchronous machine
Circuit structure building power system simulation model and virtual synchronous machine hardware circuit simulation model, it is power system simulation model, virtual same
Step machine hardware circuit simulation model is sequentially connected with virtual synchronous machine controller；As shown in Figure 1, the test method includes as follows
Step:
Step S1: receiving the drop depth parameter of the different moments of user's input, and drop depth parameter input power grid is imitated
True mode.
In embodiments of the present invention, each phase voltage amplitude of circuit simulation model can be independently set to time correlation
Falling for any depth can occur at any time for function, each phase voltage amplitude.
Step S2: response of the virtual synchronous machine hardware circuit simulation model under different drop depths is obtained.
In embodiments of the present invention, virtual synchronous machine controller falls depth in different according to virtual synchronous machine simulation model
Degree runs preset adjustable strategies in exported associated analog signal and virtual synchronous machine controller, controls virtual synchronous
It is hard to obtain virtual synchronous machine according to operating status for the operating status of virtual synchronous machine hardware circuit simulation model in machine simulation model
Response of the part circuit simulation model under different drop depths.
Step S3: virtual synchronous machine is tested according to response.
In embodiments of the present invention, according to above-mentioned virtual synchronous machine hardware circuit simulation model under different drop depths
Response, test virtual synchronous machine low voltage crossing characteristic.
In a preferred embodiment, it is specifically included as shown in Fig. 2, executing step S3:
Step S4: the low voltage crossing characteristic curve of virtual synchronous machine is generated according to response.
In embodiments of the present invention, according to above-mentioned virtual synchronous machine hardware circuit simulation model under different drop depths
Response, generate virtual synchronous machine low voltage crossing characteristic curve.
Step S5: low voltage crossing characteristic curve and default low voltage crossing characteristic curve are compared.
Default low voltage crossing characteristic curve in the embodiment of the present invention refers to standardize the power generation being linked into power grid
Equipment, country formulate corresponding standard to detect the low voltage crossing characteristic in power station, and low voltage crossing, which refers to, to be connected to the grid
Power station, after grid voltage sags, within the time of defined Voltage Drop power station can not off-grid continue to run, while energy
Reactive current is enough provided and supports power grid.Such as: " wind power plant accesses electric power to the GB/T 19963-2011 formulated for wind-power electricity generation
Systems technology regulation ", " photo-voltaic power generation station accesses power system technology rule to the GB/T 19964-2012 formulated for photovoltaic power generation
Calmly ", require that the power station of access power grid passes through low voltage crossing and detects test in the two national standards.Specifically for example such as Fig. 3
Shown in wind power plant low voltage crossing characteristic curve.
In the embodiment of the present invention, the low voltage crossing characteristic curve and above-mentioned default low voltage crossing that are obtained by test
Characteristic curve compares, and generates comparison result.
Step S6: judge whether the low voltage crossing characteristic of virtual synchronous machine is qualified according to comparing result.
In the embodiment of the present invention, whether comparison result for example may is that the coincidence deviation for judging two curves preset
Deviation range, if then virtual synchronous machine low voltage crossing characteristic meets the requirements within a preset range, if being above preset range
Inside then virtual synchronous machine is unqualified.Such as by the song in the low voltage crossing characteristic curve obtained in the embodiment of the present invention and Fig. 3
Line compares, such as after voltage falls to 20% nominal voltage, when the control signal control that virtual synchronous machine controller is sent is virtual
Synchronous machine response, guarantees not off-grid continuous operation 630ms, then virtual synchronous machine low voltage crossing characteristic meets the requirements.
Virtual synchronous machine low voltage crossing characteristic test method provided in an embodiment of the present invention, passes through hardware in loop (HIL)
Test mode realize test to virtual synchronous machine low voltage crossing performance, the different moments by receiving user input fall
Depth parameter is fallen, drop depth parameter is inputted into power system simulation model；Virtual synchronous machine hardware circuit simulation model is obtained not
Response under same drop depth generates the low voltage crossing characteristic curve of virtual synchronous machine according to response.The embodiment of the present invention
Voltage class is not related to forceful electric power at ten volts or so to the method for offer during the test, highly-safe；Pass through real-time simulation electricity
Net changes grid voltage amplitude flexibly, and convenience is high, is not necessarily to true grid simulator or programmable alternating-current voltage source, i.e.,
Low voltage crossing performance test can be completed to the virtual synchronous machine of different voltages, power grade, it is at low cost and guarantee testing
The actual hardware of Cheng Buhui damage virtual synchronous machine.
Embodiment 2
The embodiment of the present invention provides a kind of virtual synchronous machine low voltage crossing characteristic test device, and the virtual synchronous machine is imitative
True mode includes: respectively according to the power system simulation model and virtual synchronous of the building of the circuit structure of network system and virtual synchronous machine
Machine hardware circuit simulation model, the power system simulation model, virtual synchronous machine hardware circuit simulation model and virtual synchronous machine control
Device processed is sequentially connected；As shown in figure 4, the test device includes:
Drop depth parameter setting module 1, the drop depth parameter of the different moments for receiving user's input, will be described
Drop depth parameter inputs the power system simulation model.This module executes method described in the step S1 in embodiment 1, herein
It repeats no more.
Drop depth response obtains module 2, for obtaining the virtual synchronous machine hardware circuit simulation model different
Response under drop depth.The method that this module executes the step S2 in embodiment 1, details are not described herein.
Test module 3, for according to the test virtual synchronous machine.This module executes the step S3 in embodiment 1
Described method, details are not described herein.
In a preferred embodiment, the test module 3 specifically includes:
Low voltage crossing characteristic curve generates submodule 31, for generating the low of the virtual synchronous machine according to the response
Voltage ride-through characteristic curve；This module executes method described in the step S4 in embodiment 1, and details are not described herein.
Curve comparison submodule 32 is used for the low voltage crossing characteristic curve and default low voltage crossing characteristic curve
It compares.This module executes method described in the step S5 in embodiment 1, and details are not described herein.
Judging submodule 33, for judging whether the low voltage crossing characteristic of the virtual synchronous machine closes according to comparing result
Lattice.This module executes method described in the step S6 in embodiment 1, and details are not described herein.
Virtual synchronous machine low voltage crossing characteristic test device provided in an embodiment of the present invention, passes through hardware in loop (HIL)
Test mode realize test to virtual synchronous machine low voltage crossing performance, the different moments by receiving user input fall
Depth parameter is fallen, drop depth parameter is inputted into power system simulation model；Virtual synchronous machine hardware circuit simulation model is obtained not
Response under same drop depth generates the low voltage crossing characteristic curve of virtual synchronous machine according to response.The embodiment of the present invention
The system of offer, voltage class is not related to forceful electric power at ten volts or so during the test, highly-safe；Pass through real-time simulation electricity
Net changes grid voltage amplitude flexibly, and convenience is high, is not necessarily to true grid simulator or programmable alternating-current voltage source, i.e.,
Low voltage crossing performance test can be completed to the virtual synchronous machine of different voltages, power grade, it is at low cost and guarantee testing
The actual hardware of Cheng Buhui damage virtual synchronous machine.
Embodiment 3
A kind of virtual synchronous machine low voltage crossing characteristic test system is provided in the embodiment of the present invention, as shown in figure 5, packet
It includes: real-time simulation machine 11, virtual synchronous machine controller 12 and test device 13, in which:
In the embodiment of the present invention, which may, for example, be test device described in above-described embodiment 2 and in fact
Existing function.
In the embodiment of the present invention, as shown in fig. 6, real-time simulation machine 11 is used for respectively according to network system and virtual synchronous machine
Circuit structure building power system simulation model 111 and virtual synchronous machine hardware circuit simulation model 112, power system simulation model
111, virtual synchronous machine hardware circuit simulation model 112 is sequentially connected with virtual synchronous machine controller 12, according to user's input
The drop depth parameter operation virtual synchronous machine hardware circuit simulation model 112 and power system simulation model 111 of different moments, output
Analog signal.
In the embodiment of the present invention, real-time simulation machine 11 optionally has RT-Lab, RTDS, NI VeriStand, dSpace, or
Person Typhoon, but be not limited thereto.In a preferred embodiment, above-mentioned analog signal can be virtual synchronous generator terminal
Mouth three-phase voltage, virtual synchronous generator terminal mouth three-phase current, virtual synchronous machine three-phase filter capacitor voltage, virtual synchronous machine inverter side
At least one of three-phase current and DC voltage.
Virtual synchronous machine controller 12 exports analog signal according to real-time simulation machine and according to default adjustable strategies, exports number
The operating status of virtual synchronous machine hardware circuit model in word Signal Regulation real-time simulation machine 11, test device 13 is according to imitative in real time
The operating status of the operating status of virtual synchronous machine hardware circuit model obtains virtual synchronous machine hardware circuit emulation mould in prototype
Response of the type under different drop depths.
In a preferred embodiment, above-mentioned digital signal includes the pulse width that the virtual synchronous machine controller generates
Modulated pulse signal and grid-connected switch control signal, wherein pwm pulses signal is for controlling the simulation hardware
The on-off of switching tube (g in Fig. 6) in circuit model；Grid-connected switch control signal is for controlling in simulation hardware circuit model simultaneously
The on-off of net switch (S in Fig. 6).
In a preferred embodiment, as shown in fig. 6, above-mentioned virtual synchronous machine low voltage crossing characteristic test system, goes back
Include: signal regulating panel 14, signal regulating panel 14 by data connecting line line respectively with real-time simulation machine 11 and virtual synchronous machine
Controller 12 is connected, and for the magnitude range according to the input signal of virtual synchronous machine controller 12, adjusts real-time simulation machine
The analog signal of 11 outputs, and according to the magnitude range of 11 input signal of real-time simulation machine, adjust the virtual synchronous machine control
The digital signal that device 12 exports.
In a preferred embodiment, real-time simulation machine 11 runs power system simulation model and the emulation of virtual synchronous machine hardware circuit
Model records and shows power grid three-phase voltage, virtual synchronous generator terminal mouth three-phase voltage, virtual synchronous generator terminal mouth three-phase current, void
At least one of quasi- synchronous machine three-phase filter capacitor voltage, virtual synchronous machine inverter side three-phase current and DC voltage,
It is also used to calculate, record and show in the active power and reactive power of the virtual synchronous machine hardware circuit simulation model extremely
It is one of few.
In a preferred embodiment, virtual synchronous machine hardware circuit simulation model includes: DC power supply model, DC side filter
Wave capacitor model, three phase inverter bridge model are at least one of, LCL Three-phase electric-wave filter model and three-phase grid switch models.
In a preferred embodiment, power system simulation model includes programmable three-phase desired voltage source model and three-phase power transmission
At least one of circuit model, wherein each phase voltage amplitude of the programmable three-phase desired voltage source model is set as
Time correlation function.
The embodiment of the invention provides a kind of virtual synchronous machine low voltage crossing characteristic tests provided in an embodiment of the present invention
System realizes the test to virtual synchronous machine low voltage crossing performance by the test mode of hardware in loop (HIL), passes through reception
Drop depth parameter is inputted power system simulation model by the drop depth parameter of the different moments of user's input；Obtain virtual synchronous
Response of the machine hardware circuit simulation model under different drop depths generates the low voltage crossing of virtual synchronous machine according to response
Characteristic curve.Voltage class is not related to forceful electric power at ten volts or so to method provided in an embodiment of the present invention during the test, safety
Property it is high；By real-time simulation power grid, change grid voltage amplitude flexibly, convenience is high, without true grid simulator or
Programmable alternating-current voltage source can complete low voltage crossing performance test to the virtual synchronous machine of different voltages, power grade, at
This is low and guarantees that the actual hardware of virtual synchronous machine will not be damaged in test process.
Embodiment 4
The embodiment of the present invention also provides a kind of computer readable storage medium, and meter is stored on computer readable storage medium
The low electricity of virtual synchronous machine in above-mentioned any means embodiment 1 can be performed in calculation machine executable instruction, the computer executable instructions
Press to wear more characteristic test method.Wherein, the storage medium can be magnetic disk, CD, read-only memory (Read-Only
Memory, ROM), random access memory (Random Access Memory, RAM), flash memory (Flash
Memory), hard disk (Hard Disk Drive, abbreviation: HDD) or solid state hard disk (Solid-State Drive, SSD) etc.；Institute
State the combination that storage medium can also include the memory of mentioned kind.
Obviously, the above embodiments are merely examples for clarifying the description, and does not limit the embodiments.It is right
For those of ordinary skill in the art, can also make on the basis of the above description it is other it is various forms of variation or
It changes.There is no necessity and possibility to exhaust all the enbodiments.And thus amplify out it is obvious variation or
It changes still within the protection scope of the invention.
Claims (13)
1. a kind of virtual synchronous machine low voltage crossing characteristic test method, which is characterized in that the test method is based on virtual same
Step machine simulation model carries out, and the virtual synchronous machine simulation model includes: respectively according to network system and the electricity of virtual synchronous machine
The power system simulation model and virtual synchronous machine hardware circuit simulation model of line structure building, it is the power system simulation model, virtual same
Step machine hardware circuit simulation model is sequentially connected with virtual synchronous machine controller；The test method includes:
The drop depth parameter is inputted the grid simulation mould by the drop depth parameter for receiving the different moments of user's input
Type；
Obtain response of the virtual synchronous machine hardware circuit simulation model under different drop depths；
According to virtual synchronous machine described in the response test.
2. virtual synchronous machine low voltage crossing characteristic test method shown according to claim 1, which is characterized in that the basis
Described in the response test the step of virtual synchronous machine, comprising:
The low voltage crossing characteristic curve of the virtual synchronous machine is generated according to the response；
The low voltage crossing characteristic curve and default low voltage crossing characteristic curve are compared；
Judge whether the low voltage crossing characteristic of the virtual synchronous machine is qualified according to comparing result.
3. a kind of virtual synchronous machine low voltage crossing characteristic test device, which is characterized in that the virtual synchronous machine simulation model
It include: the power system simulation model and virtual synchronous machine hardware constructed respectively according to the circuit structure of network system and virtual synchronous machine
Circuit simulation model, the power system simulation model, virtual synchronous machine hardware circuit simulation model and virtual synchronous machine controller according to
Secondary connection；The test device includes:
Drop depth parameter setting module, the drop depth parameter of the different moments for receiving user's input, falls described
Depth parameter inputs the power system simulation model；
Drop depth response obtains module, falls depth in different for obtaining the virtual synchronous machine hardware circuit simulation model
Response under degree；
Test module is used for the virtual synchronous machine according to the response test.
4. the low voltage crossing test device based on virtual synchronous machine simulation model according to shown in claim 3, feature exist
In the test module includes:
Low voltage crossing characteristic curve generates submodule, and the low-voltage for generating the virtual synchronous machine according to the response is worn
More characteristic curve；
Curve comparison submodule, for doing pair the low voltage crossing characteristic curve and default low voltage crossing characteristic curve
Than；
Judging submodule, for judging whether the low voltage crossing characteristic of the virtual synchronous machine is qualified according to comparing result.
5. a kind of virtual synchronous machine low voltage crossing characteristic test system characterized by comprising real-time simulation machine, virtual same
Walk machine controller and test device as described in claim 3 or 4, wherein
Grid simulation mould of the real-time simulation machine for being constructed respectively according to the circuit structure of network system and virtual synchronous machine
Type and virtual synchronous machine hardware circuit simulation model, the power system simulation model, virtual synchronous machine hardware circuit simulation model with
Virtual synchronous machine controller is sequentially connected, and runs the virtual synchronous according to the drop depth parameter of the different moments of user's input
Machine hardware circuit simulation model and power system simulation model export analog signal；
The virtual synchronous machine controller exports analog signal according to the real-time simulation machine and according to default adjustable strategies, exports
Digital signal adjusts the operating status of virtual synchronous machine hardware circuit model described in the real-time simulation machine；
The test device obtains virtual synchronous according to the operating status of virtual synchronous machine hardware circuit model in real-time simulation machine
Response of the machine hardware circuit simulation model under different drop depths, and the virtual synchronous machine according to the response test.
6. virtual synchronous machine low voltage crossing characteristic test system according to claim 5, which is characterized in that further include:
Signal regulating panel,
The signal regulating panel is connected with the real-time simulation machine and virtual synchronous machine controller respectively, for according to the void
The magnitude range of the input signal of quasi- synchronous machine controller adjusts the analog signal of the real-time simulation machine output, and according to institute
The magnitude range for stating real-time simulation machine input signal adjusts the digital signal of the virtual synchronous machine controller output.
7. virtual synchronous machine low voltage crossing characteristic test system according to claim 6, which is characterized in that described real-time
Replicating machine runs the power system simulation model and virtual synchronous machine hardware circuit simulation model, records and shows power grid three-phase electricity
Pressure, virtual synchronous generator terminal mouth three-phase voltage, virtual synchronous generator terminal mouth three-phase current, virtual synchronous machine three-phase filter capacitor voltage,
At least one of virtual synchronous machine inverter side three-phase current and DC voltage.
8. virtual synchronous machine low voltage crossing characteristic test system according to claim 6, which is characterized in that described real-time
Replicating machine is also used to calculate, record and shows the active power and reactive power of the virtual synchronous machine hardware circuit simulation model
At least one of.
9. virtual synchronous machine low voltage crossing characteristic test system according to claim 6, which is characterized in that described virtual
Synchronous machine hardware circuit simulation model include: DC power supply model, DC side filter capacitor model, three phase inverter bridge model with,
At least one of LCL Three-phase electric-wave filter model and three-phase grid switch models.
10. virtual synchronous machine low voltage crossing characteristic test system according to claim 6, which is characterized in that the electricity
Network simulation model includes at least one of programmable three-phase desired voltage source model and three phase line model, wherein
Each phase voltage amplitude of the programmable three-phase desired voltage source model is set as time correlation function.
11. virtual synchronous machine low voltage crossing characteristic test system according to claim 9, which is characterized in that the mould
Quasi- signal includes: virtual synchronous generator terminal mouth three-phase voltage, virtual synchronous generator terminal mouth three-phase current, virtual synchronous machine three-phase filtered electrical
Hold at least one of voltage, virtual synchronous machine inverter side three-phase current and DC voltage.
12. virtual synchronous machine low voltage crossing characteristic test system according to claim 6, which is characterized in that the number
Word signal includes: the pwm pulses signal and grid-connected switch control signal that the virtual synchronous machine controller generates,
Wherein,
The pwm pulses signal is used to control the on-off of switching tube in the simulation hardware circuit model；
The grid-connected switch control signal is for controlling grid-connected in simulation hardware circuit model switch on-off.
13. a kind of computer readable storage medium, which is characterized in that the computer-readable recording medium storage has computer to refer to
It enables, the computer instruction is for making the computer execute virtual synchronous machine low voltage crossing as claimed in claim 1 or 2
Characteristic test method.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201811268998.8A CN109490773A (en) | 2018-10-29 | 2018-10-29 | A kind of virtual synchronous machine low voltage crossing characteristic test method, apparatus and system |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201811268998.8A CN109490773A (en) | 2018-10-29 | 2018-10-29 | A kind of virtual synchronous machine low voltage crossing characteristic test method, apparatus and system |
Publications (1)
| Publication Number | Publication Date |
|---|---|
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| CN110672938A (en) * | 2019-09-19 | 2020-01-10 | 南方电网科学研究院有限责任公司 | Method and system for testing low voltage ride through characteristics of photovoltaic inverter and storage medium |
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