CN109818366A - A kind of generation of electricity by new energy power hardware assemblage on-orbit method and system - Google Patents
A kind of generation of electricity by new energy power hardware assemblage on-orbit method and system Download PDFInfo
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- CN109818366A CN109818366A CN201711177702.7A CN201711177702A CN109818366A CN 109818366 A CN109818366 A CN 109818366A CN 201711177702 A CN201711177702 A CN 201711177702A CN 109818366 A CN109818366 A CN 109818366A
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Abstract
A kind of generation of electricity by new energy power hardware assemblage on-orbit method and system, comprising: based on the electric network model in generation of electricity by new energy physical analogy platform and real-time emulation system, construct new energy power generation grid-connection power hardware in loop system；According to generation of electricity by new energy physical system and the real-time emulation system, the voltage and power grade between software and hardware system interface are determined；According to the voltage and power grade of the generation of electricity by new energy physical system and the real-time simulation system, protective current parameter is selected, determines hardware protection or software protection；Stability analysis is carried out in loop system to the new energy power generation grid-connection power hardware；Emulation accuracy test is carried out in loop system to stable new energy power generation grid-connection power hardware.Technical solution provided by the invention provides systematicness guidance and reference to build generation of electricity by new energy power hardware assemblage on-orbit platform, while providing the laboratory facilities of high reliability for generation of electricity by new energy simulation analysis.
Description
Technical field
The present invention relates to numerical model analysis emulation experiment methods, and in particular to a kind of generation of electricity by new energy power hardware assemblage on-orbit
Method and system.
Background technique
New energy power generation grid-connection research needs a kind of flexible, accurate Simulation Experimental Platform, meets generation of electricity by new energy control
The demand of the researchs such as tactful, extensive generation of electricity by new energy safety analysis.In current hardware-in-loop simulation, control hardware in loop is imitative
Very because realizing that easy configuration is flexible, applied relatively extensively in the verifying of generation of electricity by new energy control strategy, but due to there was only signal in system
Flowing, lacks the flowing of energy, it is difficult to the physical characteristic of true reflection equipment.Power hardware assemblage on-orbit is with low power physics
The extensive new energy unit/station of equipment simulating, it is multiple to greatest extent by the two-way flow of signal stream in system and energy stream
Existing actual test environment, solves that power electronics equipment Accurate Model in pure digi-tal emulation is difficult, reciprocal effect is difficult to analyze asks
Topic, the development of power hardware assemblage on-orbit experiment, needs to guarantee the stability and accuracy of system, due to by the signal in system
Delay, simulation model accuracy, the fixed step size of real-time simulator, the influence of the factors such as capacity limit of system, experiment opens
The challenge of exhibition is larger, and reliability, systematic experimental method are more deficient.
Existing power hardware assemblage on-orbit method has mainly carried out interface stability and accurate to simple bleeder circuit
Property analysis, and carried out in simulation software, in the function for facing actual hardware system and analogue system composition
When rate hardware-in-loop simulation, operability is not strong, it is difficult to the problem of the experiment of the presentation actual power hardware-in-loop simulation of system and
The method of developing.
Summary of the invention
In order to solve the above-mentioned deficiency in the presence of the prior art, the present invention provides a kind of generation of electricity by new energy power hardware and exists
Loop simulating method and system.
Present invention provide the technical scheme that
A kind of generation of electricity by new energy power hardware assemblage on-orbit method characterized by comprising
Based on the electric network model in generation of electricity by new energy physical analogy platform and real-time emulation system, building generation of electricity by new energy is simultaneously
Net power hardware is in loop system；
According to generation of electricity by new energy physical system and the real-time emulation system, the voltage between software and hardware system interface is determined
And power grade；
According to the voltage and power grade of the generation of electricity by new energy physical system and the real-time simulation system, selection protection electricity
Parameter is flowed, determines hardware protection or software protection；
Stability analysis is carried out in loop system to the new energy power generation grid-connection power hardware；
Emulation accuracy test is carried out in loop system to stable new energy power generation grid-connection power hardware.
Preferably, the electric network model based in generation of electricity by new energy physical analogy platform and real-time emulation system, building
New energy power generation grid-connection power hardware is in loop system, comprising:
According to blower, photovoltaic and energy storage generation of electricity by new energy physical platform, in conjunction with the electric network model in real-time emulation system, choosing
Power amplifier and power interface algorithm are selected, constructs new energy power generation grid-connection power hardware in loop system.
Preferably, the hardware protection includes:
Generation of electricity by new energy physical system and power amplifier are protected configured with electric fault protection, overload protection and overheat
Shield.
Preferably, the software protection includes:
When detecting that the voltage and current signal in analogue system more prescribes a time limit, the current signal of feedback channel is cut off, while defeated
The voltage signal for arriving power amplifier out continues to, and the system that detects restores normal, cuts off information of voltage.
Preferably, the new energy power generation grid-connection power hardware carries out stability analysis in loop system, comprising:
According to the Nyquist criterion that ideal transformer model interface is stable, for the power interface of zero gain, when described
When the impedance of real-time emulation system is less than the impedance of the generation of electricity by new energy physical system, system is stablized；
When the voltage of the generation of electricity by new energy physical system and real-time emulation system and power grade difference, sentenced with following formula
Disconnected stability:
In formula, ZS(s): the impedance of analogue system；ZH(s): the impedance of generation of electricity by new energy physical system；SS: in analogue system
Equivalent generation of electricity by new energy unit/station access point capacity；SH: the capacity of generation of electricity by new energy physical system；VH: generation of electricity by new energy
The voltage class of physical system；VS: equivalent generation of electricity by new energy unit/station access point voltage in analogue system；
When stability is not able to satisfy test requirements document, the new energy power generation grid-connection function is improved using stability method for improving
The stability of rate hardware in loop system.
Preferably, described when stability is not able to satisfy test requirements document, the new energy is improved using stability method for improving
Stability of the source electricity generation grid-connecting power hardware in loop system, comprising:
For in situation known to the generation of electricity by new energy physical system topology and parameter, in the generation of electricity by new energy physics
Under conditions of system voltage and capacity are constant, the interface voltage in the real-time emulation system is improved, reduces interface capacity, is improved
System stability；
In the case where for the generation of electricity by new energy physical system topology and unknown parameters, mentioned using stability test scheme
High system stability.
Preferably, the stability test method includes:
Under closed loop states, start from scratch and increase current ratio coefficient, judges whether system is stable；
When system is unstable, increases low-pass filter in the feedback loop of the real-time emulation system, reduce simultaneously
The cutoff frequency of the low-pass filter reduces current ratio coefficient, otherwise continues to sentence when the cutoff frequency reaches lower limit
Whether disconnected system is stable, when the system is stable, continues growing the current ratio coefficient；
When the system is stable, the current ratio coefficient is continued growing, until reaching expected current ratio coefficient value.
Preferably, the current ratio coefficient kIIt is calculated as follows:
In formula, VH: the voltage class of generation of electricity by new energy physical system；SH: the capacity of generation of electricity by new energy physical system；VS: it is imitative
Equivalent generation of electricity by new energy unit/station access point voltage in true system；SS: equivalent generation of electricity by new energy list in analogue system
Member/station access point capacity；kin: the signal magnification ratio of input channel.
Preferably, described pair of stable new energy power generation grid-connection power hardware carries out emulation accuracy test in loop system,
Include:
By the new energy power generation grid-connection power hardware loop system open-loop test to the new energy power generation grid-connection
Power hardware is analyzed in loop system interface delay, determines whether delay meets requirement of experiment, and then determines the new energy
Electricity generation grid-connecting power hardware, to the simulation accuracy of the generation of electricity by new energy physical system, is not able to satisfy experiment when being delayed in loop system
It is required that when, system accuracy is improved using accuracy method for improving.
Preferably, it is described when delay be not able to satisfy requirement of experiment when, using accuracy method for improving to system accuracy into
Row improves, comprising:
When physical system is not presented transient process, and when the not high occasion of harmonic requirement, system delay is passed through to object
The voltage and current of reason system carries out phase compensation and eliminates delay improvement system accuracy；
System accuracy is improved by changing the idle fan-out capability of inverter for inverter interface physical system.
A kind of generation of electricity by new energy power hardware assemblage on-orbit system, comprising:
Module is constructed, for based on the electric network model in generation of electricity by new energy physical analogy platform and real-time emulation system, structure
New energy power generation grid-connection power hardware is built in loop system；
Determining module, for determining software and hardware system according to generation of electricity by new energy physical system and the real-time emulation system
Voltage and power grade between interface, and the voltage according to the generation of electricity by new energy physical system and the real-time simulation system
And power grade, protective current parameter is selected, determines hardware protection or software protection；
Stability analysis module, for carrying out analysis of stability in loop system to the new energy power generation grid-connection power hardware
Analysis；
Precision analysis module, for carrying out emulation accuracy in loop system to stable new energy power generation grid-connection power hardware
Test.
Preferably, the stability analysis module includes: judging unit；
The judging unit, for the Nyquist criterion stable according to ideal transformer model interface, for zero gain
Power interface, when the impedance of the real-time emulation system be less than the generation of electricity by new energy physical system impedance when, system is steady
It is fixed；When the voltage of the generation of electricity by new energy physical system and real-time emulation system and power grade difference, judged surely with following formula
It is qualitative:
In formula, ZS(s): the impedance of analogue system；ZH(s): the impedance of generation of electricity by new energy physical system；SS: in analogue system
Equivalent generation of electricity by new energy unit/station access point capacity；SH: the capacity of generation of electricity by new energy physical system；VH: generation of electricity by new energy
The voltage class of physical system；VS: equivalent generation of electricity by new energy unit/station access point voltage in analogue system；
When stability is not able to satisfy test requirements document, the new energy power generation grid-connection function is improved using stability method for improving
The stability of rate hardware in loop system.
Compared with the immediate prior art, technical solution provided by the invention is had the advantages that
It is hard to carry out power to build generation of electricity by new energy power hardware assemblage on-orbit platform for technical solution provided by the invention
The experiment of part assemblage on-orbit provides systematicness guidance and reference, also provides high reliability, wide for generation of electricity by new energy simulation analysis
The laboratory facilities of adaptability play a significant role in terms of disclosing generation of electricity by new energy and power grid reciprocal effect mechanism.
Technical solution provided by the invention is improved the accuracy of emulation using phase compensating method, solves power hardware
Latency issue in assemblage on-orbit system.
Technical solution provided by the invention uses based on software protection, and after protection act, system forms open loop situations,
The voltage of hardware system continues to keep, and reduces the excessive uncontrollability acted with experiment of hardware protection, has stronger safety
Property.
Detailed description of the invention
Fig. 1 is generation of electricity by new energy power hardware assemblage on-orbit method flow diagram of the invention；
Fig. 2 is ITM power interface model of the invention；
Fig. 3 is method of software Protection of the invention；
Fig. 4 is stability test of the invention and lifting scheme flow chart；
Fig. 5 is generation of electricity by new energy power hardware assemblage on-orbit platform of the invention；
Fig. 6 is power hardware assemblage on-orbit protection act post-simulation system voltage electric current provided by the invention；
1- analogue system；2- power amplifier；3- generation of electricity by new energy physical platform；4- hardware system.
Specific embodiment
For a better understanding of the present invention, the contents of the present invention are done further with example with reference to the accompanying drawings of the specification
Explanation.
As shown in Fig. 1, the present invention provides a kind of generation of electricity by new energy power hardware assemblage on-orbit method and system, the side
Method includes the following steps:
Step 1: based on the electric network model in generation of electricity by new energy physical analogy platform and real-time emulation system, constructing new energy
Electricity generation grid-connecting power hardware is in loop system；
Generation of electricity by new energy physical analogy platform in step 1 is 380V, 0-10kW physical platform, and current transformer interface can wrap
It includes: the generations of electricity by new energy physical platform such as blower, photovoltaic, energy storage.
Real-time emulation system simulation step length reaches us grades, has high-precision I/O module, meets artificial variable and be reliably converted into
The demand of high-precision signal stream, being capable of simulated grid model.
Power amplifier be the four-quadrant linear power amplifier based on MOSFET, can by the signal in analogue system into
Row amplification is applied in hardware system, at the same can voltage, current signal in acquisition hardware system, and feed back to emulation system
System.Has preferable dynamic characteristic, for example, quickly response time and higher bandwidth (20kHZ), avoids power conversion links
There is biggish delay and error.
Power interface algorithm is higher, the easy to accomplish ideal transformer model (ITM) of accuracy, as shown in Fig. 2, institute
It states ideal transformer model and refers to and external physical system is equivalent to a current source in analogue system, pass through the electric current of feedback
It is controlled, while the end voltage of current source is applied to external physical system by power amplifier.
Step 2: according to generation of electricity by new energy physical system and the real-time emulation system, determining between software and hardware system interface
Voltage and power grade；
The voltage class of generation of electricity by new energy physical system in step 2 is VH, capacity SH, equivalent new in analogue system
Energy generator unit/station access point voltage is VS, capacity SS, the signal magnification ratio of real-time emulation system output channel is
kout, the signal magnification ratio of input channel is kin。
Physical system and analogue system voltage ratio coefficient kV, current ratio coefficient kI, signal processing in analogue system
Module is realized.
Step 3: according to the voltage and power grade of the generation of electricity by new energy physical system and the real-time simulation system, selection
Protective current parameter determines hardware protection or software protection；
Safeguard protection in step 3 includes hardware protection and software protection, and in hardware protection, power amplifier is configured with
Electric fault protection, overload protection and overheating protection function, generation of electricity by new energy physical system are protected equipped with the electric fault of itself,
Hardware protection is the basis of new energy power generation grid-connection power hardware assemblage on-orbit system protection, hardware system can be prevented due to system
Unstability is damaged.
Software protection refers to builds protection model in simulations, as shown in Fig. 3, monitors the voltage and current signal of interface
Deng, once it is out-of-limit, it protects and acts immediately, prevent the out-of-limit signal in analogue system from entering hardware system.The protection act side
Case refers to when the voltage and current signal in analogue system is more prescribed a time limit, and is first turned off the current signal of feedback channel, and system formation is opened
Ring status, while the voltage signal for being output to power amplifier is continued to until system restores normal, then cuts off voltage letter
Number, it can prevent that the hardware protection of physical system from excessively acting and external hardware system due to losing voltage drive suddenly in this way,
Generate unstability high voltage.
Step 4: stability analysis is carried out in loop system to the new energy power generation grid-connection power hardware；
As shown in figure 4, the closed loop stability analysis in step 4 refer to the open loop function using closed-loop system to stability into
Row theory analysis, stability analysis are as follows:
Enable ZSAnd ZHIt is respectively the impedance of analogue system and physical system, according to the Nyquist criterion that ITM interface is stable
It is found that working as Z for the power interface of zero gainS(s) < ZH(s) system is stable when；When physical system and analogue system
When voltage and power grade difference, stability criteria are as follows:
Therefore it can be managed for passing through stability criteria (2) in situation known to generation of electricity by new energy hardware system topology and parameter
By its stability status of analysis, while in the case where hardware system voltage and constant capacity, the interface in analogue system is improved
Voltage, the stability of system can be increased by reducing interface capacity, be needed in the case where unknown for generation of electricity by new energy hardware system inside
Guarantee the stabilization of system using stability test scheme.
Stability test protocol step is to start from scratch under closed loop states and increase kIUntil reaching expected kIValue, if
During this, system unstability then needs the feedback loop in analogue system to increase low-pass filter, changes system open loop transmitting
The poles and zeros assignment of function, thus systems stabilisation, while in the cutoff frequency for reducing low-pass filter and increasing kIBetween interaction
It carries out, so that closed-loop system reaches stable under the requirement for meeting setting ratio coefficient.
Step 5: emulation accuracy test is carried out in loop system to stable new energy power generation grid-connection power hardware.
Emulation accuracy in step 5 refers to that the delay in closed-loop system will lead to simulated mass decline, output waveform
Whether accuracy generates variation, need to analyze system interface delay by open-loop test, determine delay insignificant
In range, if excessive, need to compensate.
The delay of closed-loop system refers to that one-way data from the overall process time delays for being output to return, specifically includes that power
Amplifier and sensor delay, interactive interfacing delay, filtering link delay.When four-quadrant linear power amplifier in the present invention
Between delay less than 10 μ s, sensor delay is less than 1 μ s, compared to the delay of close power amplifier Millisecond, linear power amplifier
Delay greatly reduces；Interactive interfacing delay refer to real-time emulation system carry out simulation calculating after transmit the result to data output connect
Mouth card, data output interface card are transferred to power amplifier and feedback current through number by analog channel after D/A is converted
According to the total time delay for being input to RTDS operation after input interface card and A/D conversion, the delay of this part is an electro-magnetic transient
Simulation step length；It is related with the filter module type and parameter setting selected to filter link delay, to reach filter effect while again
Delay is reduced as far as possible, suitable filter module is selected according to harmonic wave situation, to guarantee system stability, is returned in current feedback
The low-pass filter being added in road also reduces the precision of emulation to a certain extent.
Accuracy lifting scheme refers to that, for new energy power generation grid-connection dynamic analysis, transient process is not presented in physical system,
And the occasion that harmonic requirement is not high, it can be compensated by the voltage current phase of physical system to eliminate the compensation of system delay, it is right
The phase of electric current of the feedback into analogue system can be changed by the idle fan-out capability of inverter in inverter interface physical system
Position.
Attached drawing 5 illustrates the wind-electricity integration power hardware assemblage on-orbit experiment porch constructed by the method for the invention, with flat
Platform carries out grid-connected PHIL confirmatory experiment, verifies the validity of proposed method.
Attached drawing 6, since photovoltaic converter impedance variations cause the analogue system after system concussion unstability software protection movement
Voltage and current, it is seen that feedback current is cut to 0, and open loop situations are presented in system and output voltage still maintains normal value.
The present invention also provides a kind of generation of electricity by new energy power hardware assemblage on-orbit systems, comprising:
Module is constructed, for based on the electric network model in generation of electricity by new energy physical analogy platform and real-time emulation system, structure
New energy power generation grid-connection power hardware is built in loop system；
Determining module, for determining software and hardware system according to generation of electricity by new energy physical system and the real-time emulation system
Voltage and power grade between interface, and the voltage according to the generation of electricity by new energy physical system and the real-time simulation system
And power grade, protective current parameter is selected, determines hardware protection or software protection；
Stability analysis module, for carrying out analysis of stability in loop system to the new energy power generation grid-connection power hardware
Analysis；
Precision analysis module, for carrying out emulation accuracy in loop system to stable new energy power generation grid-connection power hardware
Test；
The stability analysis module includes: judging unit and stability adjustment unit；
The judging unit, for the Nyquist criterion stable according to ideal transformer model interface, for zero gain
Power interface, when the impedance of the real-time emulation system be less than the generation of electricity by new energy physical system impedance when, system is steady
It is fixed；When the voltage of the generation of electricity by new energy physical system and real-time emulation system and power grade difference, judged surely with following formula
It is qualitative:
In formula, ZS(s): the impedance of analogue system；ZH(s): the impedance of generation of electricity by new energy physical system；SS: in analogue system
Equivalent generation of electricity by new energy unit/station access point capacity；SH: the capacity of generation of electricity by new energy physical system；VH: generation of electricity by new energy
The voltage class of physical system；VS: equivalent generation of electricity by new energy unit/station access point voltage in analogue system.
The stability adjustment unit, for when stability is not able to satisfy test requirements document, using stability method for improving
The new energy power generation grid-connection power hardware is improved in the stability of loop system, comprising:
For in situation known to the generation of electricity by new energy physical system topology and parameter, in the generation of electricity by new energy physics
Under conditions of system voltage and capacity are constant, the interface voltage in the real-time emulation system is improved, reduces interface capacity, is improved
System stability；In the case where for the generation of electricity by new energy physical system topology and unknown parameters, using stability test side
Case improves system stability.
Stability test method includes:
Under closed loop states, start from scratch and increase current ratio coefficient, judges whether system is stable；
When system is unstable, increases low-pass filter in the feedback loop of the real-time emulation system, reduce simultaneously
The cutoff frequency of the low-pass filter reduces current ratio coefficient, otherwise continues to sentence when the cutoff frequency reaches lower limit
Whether disconnected system is stable, when the system is stable, continues growing the current ratio coefficient；
When the system is stable, the current ratio coefficient is continued growing, until reaching expected current ratio coefficient value.
The current ratio coefficient kIIt is calculated as follows:
In formula, VH: the voltage class of generation of electricity by new energy physical system；SH: the capacity of generation of electricity by new energy physical system；VS: it is imitative
Equivalent generation of electricity by new energy unit/station access point voltage in true system；SS: equivalent generation of electricity by new energy list in analogue system
Member/station access point capacity；kin: the signal magnification ratio of input channel.
Precision analysis module includes: judging unit and precision adjustment unit；
Judging unit, for by the new energy power generation grid-connection power hardware loop system open-loop test to described new
Energy electricity generation grid-connecting power hardware is analyzed in loop system interface delay, determines whether delay meets requirement of experiment, and then really
The fixed new energy power generation grid-connection power hardware is in loop system to the simulation accuracy of the generation of electricity by new energy physical system.
Precision adjustment unit, for when delay be not able to satisfy requirement of experiment when, using accuracy method for improving to system essence
True property improves, specific as follows:
When physical system is not presented transient process, and when the not high occasion of harmonic requirement, system delay is passed through to object
The voltage and current of reason system carries out phase compensation and eliminates delay improvement system accuracy；
For inverter interface physical system by change inverter idle fan-out capability improve system accuracy in.
It should be understood by those skilled in the art that, embodiments herein can provide as method, system or computer program
Product.Therefore, complete hardware embodiment, complete software embodiment or reality combining software and hardware aspects can be used in the application
Apply the form of example.Moreover, it wherein includes the computer of computer usable program code that the application, which can be used in one or more,
The computer program implemented in usable storage medium (including but not limited to magnetic disk storage, CD-ROM, optical memory etc.) produces
The form of product.
The application is referring to method, the process of equipment (system) and computer program product according to the embodiment of the present application
Figure and/or block diagram describe.It should be understood that every one stream in flowchart and/or the block diagram can be realized by computer program instructions
The combination of process and/or box in journey and/or box and flowchart and/or the block diagram.It can provide these computer programs
Instruct the processor of general purpose computer, special purpose computer, Embedded Processor or other programmable data processing devices to produce
A raw machine, so that being generated by the instruction that computer or the processor of other programmable data processing devices execute for real
The device for the function of being specified in present one or more flows of the flowchart and/or one or more blocks of the block diagram.
These computer program instructions, which may also be stored in, is able to guide computer or other programmable data processing devices with spy
Determine in the computer-readable memory that mode works, so that it includes referring to that instruction stored in the computer readable memory, which generates,
Enable the manufacture of device, the command device realize in one box of one or more flows of the flowchart and/or block diagram or
The function of being specified in multiple boxes.
These computer program instructions also can be loaded onto a computer or other programmable data processing device, so that counting
Series of operation steps are executed on calculation machine or other programmable devices to generate computer implemented processing, thus in computer or
The instruction executed on other programmable devices is provided for realizing in one or more flows of the flowchart and/or block diagram one
The step of function of being specified in a box or multiple boxes.
The above is only the embodiment of the present invention, are not intended to restrict the invention, all in the spirit and principles in the present invention
Within, any modification, equivalent substitution, improvement and etc. done, be all contained in apply pending scope of the presently claimed invention it
It is interior.
Claims (12)
1. a kind of generation of electricity by new energy power hardware assemblage on-orbit method characterized by comprising
Based on the electric network model in generation of electricity by new energy physical analogy platform and real-time emulation system, new energy power generation grid-connection function is constructed
Rate hardware in loop system；
According to generation of electricity by new energy physical system and the real-time emulation system, the voltage and function between software and hardware system interface are determined
Rate grade；
According to the voltage and power grade of the generation of electricity by new energy physical system and the real-time simulation system, protective current ginseng is selected
Number, determines hardware protection or software protection；
Stability analysis is carried out in loop system to the new energy power generation grid-connection power hardware；
Emulation accuracy test is carried out in loop system to stable new energy power generation grid-connection power hardware.
2. the method as described in claim 1, which is characterized in that described based on generation of electricity by new energy physical analogy platform and imitative in real time
Electric network model in true system constructs new energy power generation grid-connection power hardware in loop system, comprising:
Function is selected in conjunction with the electric network model in real-time emulation system according to blower, photovoltaic and energy storage generation of electricity by new energy physical platform
Rate amplifier and power interface algorithm construct new energy power generation grid-connection power hardware in loop system.
3. the method as described in claim 1, which is characterized in that the hardware protection includes:
To generation of electricity by new energy physical system and power amplifier configured with electric fault protection, overload protection and overheating protection.
4. the method as described in claim 1, which is characterized in that the software protection includes:
When detecting that the voltage and current signal in analogue system more prescribes a time limit, the current signal of feedback channel is cut off, is output to simultaneously
The voltage signal of power amplifier continues to, and the system that detects restores normal, cuts off information of voltage.
5. the method as described in claim 1, which is characterized in that the new energy power generation grid-connection power hardware is carried out in loop system
Stability analysis, comprising:
According to the Nyquist criterion that ideal transformer model interface is stable, for the power interface of zero gain, when described real-time
When the impedance of analogue system is less than the impedance of the generation of electricity by new energy physical system, system is stablized；
When the voltage of the generation of electricity by new energy physical system and real-time emulation system and power grade difference, judged surely with following formula
It is qualitative:
In formula, ZS(s): the impedance of analogue system；ZH(s): the impedance of generation of electricity by new energy physical system；SS: it is equivalent in analogue system
Generation of electricity by new energy unit/station access point capacity；SH: the capacity of generation of electricity by new energy physical system；VH: generation of electricity by new energy physics
The voltage class of system；VS: equivalent generation of electricity by new energy unit/station access point voltage in analogue system；
When stability is not able to satisfy test requirements document, it is hard that the new energy power generation grid-connection power is improved using stability method for improving
Stability of the part in loop system.
6. method as claimed in claim 5, which is characterized in that it is described when stability is not able to satisfy test requirements document, using steady
Qualitative method for improving improves the new energy power generation grid-connection power hardware in the stability of loop system, comprising:
For in situation known to the generation of electricity by new energy physical system topology and parameter, in the generation of electricity by new energy physical system
Under conditions of voltage and capacity are constant, the interface voltage in the real-time emulation system is improved, reduces interface capacity, improves system
Stability；
In the case where for the generation of electricity by new energy physical system topology and unknown parameters, system is improved using stability test scheme
System stability.
7. method as claimed in claim 6, which is characterized in that the stability test method includes:
Under closed loop states, start from scratch and increase current ratio coefficient, judges whether system is stable；
When system is unstable, increase low-pass filter in the feedback loop of the real-time emulation system, while described in reduction
The cutoff frequency of low-pass filter reduces current ratio coefficient when the cutoff frequency reaches lower limit, otherwise continues judgement system
It whether stable unites, when the system is stable, continues growing the current ratio coefficient；
When the system is stable, the current ratio coefficient is continued growing, until reaching expected current ratio coefficient value.
8. the method for claim 7, which is characterized in that the current ratio coefficient kIIt is calculated as follows:
In formula, VH: the voltage class of generation of electricity by new energy physical system；SH: the capacity of generation of electricity by new energy physical system；VS: emulation system
Equivalent generation of electricity by new energy unit/station access point voltage in system；SS: equivalent generation of electricity by new energy unit/field in analogue system
It stands access point capacity；kin: the signal magnification ratio of input channel.
9. the method as described in claim 1, which is characterized in that described pair of stable new energy power generation grid-connection power hardware is in ring
System carries out emulation accuracy test, comprising:
By the new energy power generation grid-connection power hardware loop system open-loop test to the new energy power generation grid-connection power
The delay of hardware in loop system interface is analyzed, and determines whether delay meets requirement of experiment, and then determines the generation of electricity by new energy
Grid-connected power hardware, to the simulation accuracy of the generation of electricity by new energy physical system, is not able to satisfy requirement of experiment when being delayed in loop system
When, system accuracy is improved using accuracy method for improving.
10. method as claimed in claim 9, which is characterized in that it is described when delay is not able to satisfy requirement of experiment, using accurate
Property method for improving improves system accuracy, comprising:
When physical system is not presented transient process, and when the not high occasion of harmonic requirement, system delay is passed through to department of physics
The voltage and current of system carries out phase compensation and eliminates delay improvement system accuracy；
System accuracy is improved by changing the idle fan-out capability of inverter for inverter interface physical system.
11. a kind of generation of electricity by new energy power hardware assemblage on-orbit system characterized by comprising
Module is constructed, for based on the electric network model in generation of electricity by new energy physical analogy platform and real-time emulation system, building to be new
Energy electricity generation grid-connecting power hardware is in loop system；
Determining module, for determining software and hardware system interface according to generation of electricity by new energy physical system and the real-time emulation system
Between voltage and power grade, and voltage and function according to the generation of electricity by new energy physical system and the real-time simulation system
Rate grade selects protective current parameter, determines hardware protection or software protection；
Stability analysis module, for carrying out stability analysis in loop system to the new energy power generation grid-connection power hardware；
Precision analysis module is surveyed for carrying out emulation accuracy in loop system to stable new energy power generation grid-connection power hardware
Examination.
12. system as claimed in claim 11, which is characterized in that the stability analysis module includes: judging unit；
The judging unit, for the Nyquist criterion stable according to ideal transformer model interface, for the function of zero gain
Rate interface, when the impedance of the real-time emulation system is less than the impedance of the generation of electricity by new energy physical system, system is stablized；When
When the voltage of the generation of electricity by new energy physical system and real-time emulation system and power grade difference, stability is judged with following formula:
In formula, ZS(s): the impedance of analogue system；ZH(s): the impedance of generation of electricity by new energy physical system；SS: it is equivalent in analogue system
Generation of electricity by new energy unit/station access point capacity；SH: the capacity of generation of electricity by new energy physical system；VH: generation of electricity by new energy physics
The voltage class of system；VS: equivalent generation of electricity by new energy unit/station access point voltage in analogue system；
When stability is not able to satisfy test requirements document, it is hard that the new energy power generation grid-connection power is improved using stability method for improving
Stability of the part in loop system.
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