CN110460057A - A kind of numerical model analysis analogue system suitable for alternating current-direct current mixing power grid - Google Patents
A kind of numerical model analysis analogue system suitable for alternating current-direct current mixing power grid Download PDFInfo
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- CN110460057A CN110460057A CN201910744692.3A CN201910744692A CN110460057A CN 110460057 A CN110460057 A CN 110460057A CN 201910744692 A CN201910744692 A CN 201910744692A CN 110460057 A CN110460057 A CN 110460057A
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02J—CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
- H02J3/00—Circuit arrangements for ac mains or ac distribution networks
- H02J3/02—Circuit arrangements for ac mains or ac distribution networks using a single network for simultaneous distribution of power at different frequencies; using a single network for simultaneous distribution of ac power and of dc power
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Abstract
The invention discloses a kind of numerical model analysis analogue systems suitable for alternating current-direct current mixing power grid, it is related to Hybrid Real-Time Simulator for Power Systems field, by digital side interface come the current measurement signal of direct-current measuring device and alternating-current measuring device, real-timedigital simulation is carried out together with Digital Simulation subsystem, control system generates control signal according to the voltage signal of result and direct-current measuring device and alternating-current measuring device from digital side interface simulation, DC interface with exchange interface the result of digital simulation be amplified to by corresponding power grade according to control signal, digital simulation subsystem is carried out equivalent, physical simulation is carried out to form Equivalent DC voltage source and equivalent AC voltage source and physical simulation subsystem；Direct-current measuring device measures to DC interface with the output voltage and electric current for exchanging interface with alternating-current measuring device and is respectively transmitted to control system and digital side interface, moves in circles and is emulated.
Description
Technical field
The present invention relates to Hybrid Real-Time Simulator for Power Systems field, more particularly to one kind are mixed suitable for alternating current-direct current
Close the numerical model analysis analogue system of power grid.
Background technique
As the basic means of research electric system, Simulating technique in Electric Power System is in Electric Power Network Planning, test, operation and research
Etc. all play vital effect.According to the difference of embodiment, Simulating technique in Electric Power System can be divided into physics
Analog- and digital- emulation.Physical analogy builds correspondence by using physical component and equipment actual or by scaled down
System carries out l-G simulation test.Physical analogy is it can be considered that the factors such as non-linear present in actual conditions, saturation, electromagnetic interference
It influences, thus simulation process ocular and clear, simulation result are true and reliable, are suitable for the complicated, mathematical model to various operational process
Not perfect enough novel device and system carry out l-G simulation test.However the modeling process of physical analogy is complicated, higher cost, parameter
Adjustment is inconvenient, and transplantability, scalability and compatibility are all poor, seriously restricts the development of physical simulation techniques.In contrast, number
Word emulation using numerical computation technology development and computer performance promoted bring benefit, by computer software program or
Model is built, realize the simulation study for large-scale electrical power system with can be convenient.Model is built in Digital Simulation and parameter is repaired
Change convenience, test repeatable, good economy performance, is highly-safe, has become in Power System Analysis at this stage and research and generally adopt
Means.However the accuracy of the result of digital simulation is largely dependent upon selected mathematical model, for having
Its performance of the emulation of high frequency characteristics is also also to be hoisted.Both the above emulation mode has respective advantage and deficiency, by the two
The numerical model analysis emulation technology combined can then learn from other's strong points to offset one's weaknesses, and give full play to the advantage of the two, thus receive increasingly
More concerns and research.
In transmission of electricity link, with the continuous decline of thyristor inverter manufacturing cost, direct current transportation has been obtained widely
Using.It is mutual between remote bulk power transmission, submarine cable power transmission, different frequency or the AC system of non-synchronous operation
Applications, the DC transmission systems such as the transmission of electricity of connection, limiting short-circuit current, cooperation new energy all have significant advantage.In distribution
In link, distributed generation resource and energy-storage system obtain broad development, and power electronic equipment is widely applied, and more and more direct currents are negative
It carries or the load containing DC link accesses power distribution network.Using with direct current is leading distributinog system, is improving power distribution network operation effect
Rate, improvement power supply reliability and power quality, the realization flexible secure accessing of distributed power generation etc. show AC system institute
The superiority not having.Alternating current-direct current mixes the important trend for being increasingly becoming current power system development, and mixes to alternating current-direct current
During the operation of power grid, control and protection are studied, l-G simulation test is all an essential ring.
Trend and alternating current-direct current for modern power systems power electronics mix generally existing status, in order to adapt to
The power train that generation of electricity by new energy, flexible transmission, alternating current-direct current microgrid etc. interact comprising alternating current-direct current link and multiple portions simultaneously
Developmental research of uniting needs, it is necessary to provide adaptable therewith numerical model analysis emulation technology and experiment porch.
Summary of the invention
The purpose of the present invention is to provide a kind of numerical model analysis analogue systems suitable for alternating current-direct current mixing power grid, to solve
The disadvantage of the applicability deficiency for existing numerical model analysis analogue system of having determined.
To achieve the above object, the present invention provides a kind of numerical model analysis suitable for alternating current-direct current mixing power grid to emulate system
System, comprising: Digital Simulation subsystem, digital side interface, control system, DC interface, exchange interface, direct-current measuring device, friendship
Flow measuring apparatus and physical simulation subsystem；
The direct-current measuring device is connect with digital side interface, control system, DC interface and physical simulation subsystem respectively；Institute
It states DC voltage and DC current of the direct-current measuring device for exporting DC interface to measure, and by the DC voltage
Measuring signal is transferred to the control system, and the DC current measurement signal is transferred to the digital side interface；
The alternating-current measuring device is connect with digital side interface, control system, exchange interface and physical simulation subsystem respectively；Institute
State alternating-current measuring device for exchange interface output alternating voltage and alternating current measure, and by the alternating voltage
Measuring signal is transferred to the control system, and the ac current measurement signal is transferred to the digital side interface；
The number side interface is connected with Digital Simulation subsystem and control system respectively；The number side interface is for receiving
The direct-current measuring device and the current measurement signal of alternating-current measuring device transmission are equivalent to physical simulation subsystem progress,
Equivalent current source is formed, and the equivalent current source is subjected to real-timedigital simulation together with Digital Simulation subsystem, will be emulated
DC voltage and AC voltages transmission are to control system at obtained decoupling；
The control system respectively with DC interface and exchange the input terminal of interface and be connected；The control system is according to the solution
DC voltage and the DC voltage measurement signal of direct-current measuring device transmission carry out operation at coupling, form first control signal to institute
DC interface is stated to be controlled；The control system is exchanged according to alternating voltage at the decoupling with what alternating-current measuring device transmitted
Voltage measurement signal carries out operation, forms second control signal and controls the exchange interface；
The DC interface is connected by direct-current measuring device with physical simulation subsystem, and the DC interface is according to described
One control signal, the DC voltage that real-timedigital simulation is obtained be amplified to corresponding power grade to digital simulation subsystem into
Row is equivalent, and forms Equivalent DC voltage source and carry out physical simulation together with physical simulation subsystem；
The exchange interface is connected by alternating-current measuring device with physical simulation subsystem, and the exchange interface is according to described
Two control signals, the alternating voltage that real-timedigital simulation is obtained be amplified to corresponding power grade to digital simulation subsystem into
Row is equivalent, and forms equivalent AC voltage source and carry out physical simulation together with physical simulation subsystem.
Further, the DC interface includes the rectification module being connected and copped wave module, the rectification module and is cut
Wave module is connect with control system respectively, and the copped wave module is connected by direct-current measuring device with physical simulation subsystem；
AC power source is transformed to steady dc voltage, institute by the first control signal that the rectification module is transmitted according to control system
State DC voltage conversion that the first control signal that copped wave module is transmitted according to control system provides rectification module be with it is real-time
The corresponding DC voltage of Digital Simulation acquired results.
Further, the exchange interface includes the rectification module and inverter module being connected, the rectification module and inverse
Become module to connect with control system respectively, the inverter module is connected by alternating-current measuring device with physical simulation subsystem；
AC power source is transformed to steady dc voltage, institute by the second control signal that the rectification module is transmitted according to control system
State DC voltage conversion that the second control signal that inverter module is transmitted according to control system provides rectification module be with it is real-time
The corresponding alternating voltage of Digital Simulation acquired results.
Further, the Digital Simulation subsystem and physical simulation subsystem are by electric system that will be to be emulated straight
Stream node and exchange and carry out decoupling formation at node, and is passing through the numerical model analysis emulation for being suitable for alternating current-direct current mixing power grid
System decoupled before numerical model analysis emulation.
Further, the direct-current measuring device includes direct current voltage sensor and DC current transformer, the direct current
Voltage sensor is connected with control system, and the DC current transformer is connected with digital side interface.
Further, the alternating-current measuring device includes AC voltage transformer and AC current transformer, the exchange
Voltage transformer is connected with control system, and the AC current transformer is connected with digital side interface.
Compared with prior art, the invention has the following beneficial effects:
A kind of numerical model analysis analogue system suitable for alternating current-direct current mixing power grid provided by the present invention, comprising: Digital Simulation
System, digital side interface, control system, DC interface, exchange interface, direct-current measuring device, alternating-current measuring device and physics
Simulation subsystem；Digital side interface is by receiving the current measurement signal come direct-current measuring device and alternating-current measuring device, with number
Word simulation subsystem carries out real-timedigital simulation together, and control system is according to result and direct current survey from digital side interface simulation
The voltage signal for measuring device and alternating-current measuring device generates control signal, DC interface and exchanges interface and will count according to signal is controlled
Word simulation result is amplified to corresponding power grade, equivalent to the progress of digital simulation subsystem, to form Equivalent DC voltage
Source and equivalent AC voltage source and physical simulation subsystem carry out physical simulation；Direct-current measuring device and alternating-current measuring device
Control system and digital side interface are measured and are respectively transmitted to the output voltage and electric current for exchanging interface to DC interface,
It moves in circles and is emulated.The present invention passes through DC interface and the DC voltage that exchanges interface and respectively obtain real-timedigital simulation
Be amplified to corresponding power grade with alternating voltage, numerical model analysis emulation carried out with this, so as to DC node with exchange
Original system to be emulated is decoupled at node, is suitable for the need of multiple types alternating current-direct current mixing power grid numerical model analysis emulation
It wants, has widened the application range of numerical model analysis analogue system.
Detailed description of the invention
It, below will be to attached drawing needed in embodiment description in order to illustrate more clearly of technical solution of the present invention
It is briefly described, it should be apparent that, the accompanying drawings in the following description is only one embodiment of the present of invention, general for this field
For logical technical staff, without creative efforts, it is also possible to obtain other drawings based on these drawings.
Fig. 1 is a kind of structural schematic diagram of the numerical model analysis analogue system suitable for alternating current-direct current mixing power grid of the present invention；
Fig. 2 is the structural schematic diagram of DC interface of the present invention；
Fig. 3 is the structural schematic diagram of present invention exchange interface.
Specific embodiment
With reference to the attached drawing in the embodiment of the present invention, the technical solution in the present invention is clearly and completely described,
Obviously, described embodiments are only a part of the embodiments of the present invention, instead of all the embodiments.Based in the present invention
Embodiment, those of ordinary skill in the art's every other embodiment obtained without creative labor,
It shall fall within the protection scope of the present invention.
As shown in Figure 1, the numerical model analysis analogue system provided by the present invention suitable for alternating current-direct current mixing power grid includes: number
Word simulation subsystem, digital side interface, control system, DC interface, exchange interface, direct-current measuring device, alternating-current measuring device
And physical simulation subsystem.
Digital-to-analogue is carried out by being suitable for the numerical model analysis analogue system of alternating current-direct current mixing power grid in electric system to be emulated
Before hybrid simulation, electric system to be emulated is decoupled at a DC node and an exchange node first, forms number
Simulation subsystem and physical simulation subsystem two parts.Physical side interfaces need while acquiring the electricity of digital side and physical side
Pressure is to carry out operation, and digital side interfaces only need the electric current of physical side.
First output end of direct-current measuring device is connected with the first input end of digital side interface, second output terminal and control
The second input terminal of system processed is connected；The DC voltage and DC current that direct-current measuring device exports DC interface are surveyed
Amount, and DC voltage measurement signal is transferred to control system, DC current measurement signal is transferred to digital side interface；
First output end of alternating-current measuring device is connected with the second input terminal of digital side interface, and second output terminal and control are
System third input terminal is connected；Alternating-current measuring device measures the alternating voltage and alternating current of exchange interface output, and
Ac voltage measurement signal is transferred to control system, ac current measurement signal is transferred to digital side interface；
Digital side interface is connected with Digital Simulation subsystem, the output end of digital side interface and the first input end of control system
It is connected, the first input end of digital side interface is connected with the first output end of direct-current measuring device, and the of digital side interface
Two input terminals are connected with the first output end of alternating-current measuring device；The direct current of digital side interface direct-current measuring device transmission
Current measurement signal and the ac current measurement signal of alternating-current measuring device transmission carry out equivalent, formation to physical simulation subsystem
Equivalent current source carries out real-timedigital simulation together with Digital Simulation subsystem, and at the decoupling that emulation is obtained DC voltage and
AC voltages transmission is to control system；
Second input terminal of control system is connected with the second output terminal of direct-current measuring device, the third input terminal of control system
It is connected with the second output terminal of alternating-current measuring device, the first output end of control system is connected with the input terminal of DC interface
It connects, the second output terminal of control system is connected with the input terminal for exchanging interface；Control system is transmitted according to digital side interface
The DC voltage measurement signal that DC voltage is transmitted with direct-current measuring device at decoupling is handled, and corresponding first control is formed
Signal controls DC interface；Alternating voltage and AC measurment fill at the decoupling that control system is transmitted according to digital side interface
The ac voltage measurement signal for setting transmission is handled, and is formed corresponding second control signal and is controlled exchange interface；
DC interface is connected by direct-current measuring device with physical simulation subsystem, and DC interface is transmitted according to control system
First control signal, the DC voltage that real-timedigital simulation is obtained are amplified to corresponding power grade to digital simulation subsystem
Carry out it is equivalent, formed Equivalent DC voltage source physical simulation is carried out together with physical simulation subsystem；
Exchange interface is connected by alternating-current measuring device with physical simulation subsystem, and exchange interface is transmitted according to control system
Second control signal, the alternating voltage that real-timedigital simulation is obtained are amplified to corresponding power grade to digital simulation subsystem
Carry out it is equivalent, formed equivalent AC voltage source physical simulation is carried out together with physical simulation subsystem.
In the present embodiment, digital side interface is realized by building controlled current source in RTDS, and control system uses DSP core
Piece is realized；Direct-current measuring device includes direct current voltage sensor and DC current transformer, and DC current transformer uses Hall
DC current transformer, direct current voltage sensor are connected with control system, and Hall DC current transformer and digital side interface connect
It connects, direct current voltage sensor and Hall DC current transformer are connect with DC interface respectively；Alternating-current measuring device includes exchange
Voltage transformer and AC current transformer, AC voltage transformer are connected with control system, AC current transformer and number
Side interface connection, AC voltage transformer and AC current transformer are connect with exchange interface respectively.
As shown in Fig. 2, Fig. 2 is DC interface structural schematic diagram provided in an embodiment of the present invention, DC interface includes being connected
The rectification module and copped wave module connect, rectification module and copped wave module are connect with control system respectively, and copped wave module passes through direct current
Measuring device is connected with physical simulation subsystem；The first control signal that rectification module is transmitted according to control system will exchange
Power conversion is steady dc voltage, and copped wave module provides rectification module according to the first control signal that control system is transmitted
DC voltage conversion be DC voltage corresponding with real-timedigital simulation acquired results.In the present embodiment, rectification module and
Copped wave module is all made of Infineon's series module.
As shown in figure 3, Fig. 3 is exchange interface structure schematic diagram provided in an embodiment of the present invention, exchange interface includes being connected
The rectification module and inverter module connect, rectification module and inverter module are connect with control system respectively, and inverter module passes through exchange
Measuring device is connected with physical simulation subsystem；The second control signal that rectification module is transmitted according to control system will exchange
Power conversion is steady dc voltage, and inverter module provides rectification module according to the second control signal that control system is transmitted
DC voltage conversion be alternating voltage corresponding with real-timedigital simulation acquired results.In the present embodiment, rectification module and
Inverter module is all made of Infineon's series module.
The workflow for being suitable for the numerical model analysis analogue system of alternating current-direct current mixing power grid to the present invention is described in detail,
So that those skilled in the art know more about the present invention:
By electric system to be emulated a DC node and one exchange node at decouple, formed Digital Simulation subsystem and
Physical simulation subsystem two parts；Firstly, DC voltage and DC current that direct-current measuring device exports DC interface carry out
Measurement, and DC voltage measurement signal is transferred to control system, DC current measurement signal is transferred to digital side interface；It hands over
Flow measuring apparatus measures the alternating voltage and alternating current of exchange interface output, and ac voltage measurement signal is transmitted
To control system, ac current measurement signal is transferred to digital side interface.The transmission of digital side interface direct-current measuring device
DC current measurement signal and the ac current measurement signal of alternating-current measuring device transmission physical simulation subsystem is carried out etc.
Effect forms equivalent current source and carries out real-timedigital simulation together with Digital Simulation subsystem, and straight at the decoupling that emulation is obtained
Galvanic electricity pressure and AC voltages transmission to control system；DC voltage and straight at the decoupling that control system is transmitted according to digital side interface
The DC voltage measurement signal of flow measuring apparatus transmission carries out operation, forms corresponding first control signal and carries out to DC interface
Control；AC power source is transformed to steady dc voltage, cut by the first control signal that rectification module is transmitted according to control system
The DC voltage conversion that the first control signal that wave module is transmitted according to control system provides rectification module is and real-time digital
Emulate the corresponding DC voltage of acquired results.At the decoupling that control system is transmitted according to digital side interface alternating voltage with exchange
The ac voltage measurement signal of measuring device transmission carries out operation, forms corresponding second control signal and controls to exchange interface
System；AC power source is transformed to steady dc voltage, inversion by the second control signal that rectification module is transmitted according to control system
The DC voltage conversion that rectification module provides is to imitate with real-time digital by the second control signal that module is transmitted according to control system
The corresponding alternating voltage of true acquired results, to form Equivalent DC voltage source and equivalent AC voltage source and physical simulation
System carries out physical simulation, loops back and forth like this progress.
To sum up, a kind of numerical model analysis analogue system suitable for alternating current-direct current mixing power grid of the present invention, by DC interface with
Exchange interface DC voltage and alternating voltage that real-timedigital simulation obtains are amplified to corresponding power grade respectively, with this into
Line number mould hybrid simulation is suitable for so as to decouple original system to be emulated at node in DC node with exchanging
The needs of multiple types alternating current-direct current mixing power grid numerical model analysis emulation, have widened the application range of numerical model analysis analogue system.
Above disclosed is only a specific embodiment of the invention, but scope of protection of the present invention is not limited thereto,
Anyone skilled in the art in the technical scope disclosed by the present invention, can readily occur in variation or modification,
It is covered by the protection scope of the present invention.
Claims (6)
1. a kind of numerical model analysis analogue system suitable for alternating current-direct current mixing power grid, it is characterised in that: include: Digital Simulation subsystem
System, digital side interface, control system, DC interface, exchange interface, direct-current measuring device, alternating-current measuring device and physics are imitative
True subsystem；
The direct-current measuring device is connect with digital side interface, control system, DC interface and physical simulation subsystem respectively；Institute
It states DC voltage and DC current of the direct-current measuring device for exporting DC interface to measure, and by the DC voltage
Measuring signal is transferred to the control system, and the DC current measurement signal is transferred to the digital side interface；
The alternating-current measuring device is connect with digital side interface, control system, exchange interface and physical simulation subsystem respectively；Institute
State alternating-current measuring device for exchange interface output alternating voltage and alternating current measure, and by the alternating voltage
Measuring signal is transferred to the control system, and the ac current measurement signal is transferred to the digital side interface；
The number side interface is connected with Digital Simulation subsystem and control system respectively；The number side interface is for receiving
The direct-current measuring device and the current measurement signal of alternating-current measuring device transmission are equivalent to physical simulation subsystem progress,
Equivalent current source is formed, and the equivalent current source is subjected to real-timedigital simulation together with Digital Simulation subsystem, will be emulated
DC voltage and AC voltages transmission are to control system at obtained decoupling；
The control system respectively with DC interface and exchange the input terminal of interface and be connected；The control system is according to the solution
DC voltage and the DC voltage measurement signal of direct-current measuring device transmission carry out operation at coupling, form first control signal to institute
DC interface is stated to be controlled；The control system is exchanged according to alternating voltage at the decoupling with what alternating-current measuring device transmitted
Voltage measurement signal carries out operation, forms second control signal and controls the exchange interface；
The DC interface is connected by direct-current measuring device with physical simulation subsystem, and the DC interface is according to described
One control signal, the DC voltage that real-timedigital simulation is obtained be amplified to corresponding power grade to digital simulation subsystem into
Row is equivalent, and forms Equivalent DC voltage source and carry out physical simulation together with physical simulation subsystem；
The exchange interface is connected by alternating-current measuring device with physical simulation subsystem, and the exchange interface is according to described
Two control signals, the alternating voltage that real-timedigital simulation is obtained be amplified to corresponding power grade to digital simulation subsystem into
Row is equivalent, and forms equivalent AC voltage source and carry out physical simulation together with physical simulation subsystem.
2. the numerical model analysis analogue system according to claim 1 suitable for alternating current-direct current mixing power grid, it is characterised in that: institute
Stating DC interface includes the rectification module being connected and copped wave module, the rectification module and copped wave module respectively with control system
Connection, the copped wave module are connected by direct-current measuring device with physical simulation subsystem；The rectification module is according to control
AC power source is transformed to steady dc voltage by the first control signal of system transmission, and the copped wave module is according to control
The DC voltage conversion that the first control signal of system transmission provides rectification module is opposite with real-timedigital simulation acquired results
The DC voltage answered.
3. the numerical model analysis analogue system according to claim 1 suitable for alternating current-direct current mixing power grid, it is characterised in that: institute
Stating exchange interface includes the rectification module and inverter module being connected, the rectification module and inverter module respectively with control system
Connection, the inverter module are connected by alternating-current measuring device with physical simulation subsystem；The rectification module is according to control
AC power source is transformed to steady dc voltage by the second control signal of system transmission, and the inverter module is according to control
The DC voltage conversion that the second control signal of system transmission provides rectification module is opposite with real-timedigital simulation acquired results
The alternating voltage answered.
4. the numerical model analysis analogue system according to claim 1 suitable for alternating current-direct current mixing power grid, it is characterised in that: institute
State Digital Simulation subsystem and physical simulation subsystem pass through by electric system to be emulated DC node with exchange at node
Decoupling formation is carried out, and imitative carrying out numerical model analysis by the numerical model analysis analogue system suitable for alternating current-direct current mixing power grid
It is decoupled before true.
5. the numerical model analysis analogue system according to claim 1 suitable for alternating current-direct current mixing power grid, it is characterised in that: institute
Stating direct-current measuring device includes direct current voltage sensor and DC current transformer, the direct current voltage sensor and control system
Connection, the DC current transformer are connected with digital side interface.
6. the numerical model analysis analogue system according to claim 1 suitable for alternating current-direct current mixing power grid, it is characterised in that: institute
Stating alternating-current measuring device includes AC voltage transformer and AC current transformer, the AC voltage transformer and control system
Connection, the AC current transformer are connected with digital side interface.
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| CN102799715A (en) * | 2012-06-26 | 2012-11-28 | 国家电网公司 | Digital and physical hybrid simulation method and system for power primary system |
| CN102790388A (en) * | 2012-07-11 | 2012-11-21 | 中国电力科学研究院 | Cascade multi-terminal extra-high voltage direct current simulation system and control protecting method thereof |
| CN105932666A (en) * | 2016-05-18 | 2016-09-07 | 中国电力科学研究院 | Complex distribution network multi-time-scale digital-analog hybrid simulation system and simulation method therefor |
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