CN112783002A - Digital-analog hybrid simulation method and system for direct-current power distribution network - Google Patents
Digital-analog hybrid simulation method and system for direct-current power distribution network Download PDFInfo
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Abstract
The invention provides a digital-analog hybrid simulation method and a digital-analog hybrid simulation system for a direct-current power distribution network, wherein components which are easy to perform real-time digital simulation and components which are easy to perform physical analog simulation in the direct-current power distribution network are identified in an obtained topological structure; and the two parts are respectively input into a physical model part and an analog simulation model part of a real-time digital simulation model part of a pre-constructed direct-current power distribution network digital-analog hybrid simulation model, and then hybrid simulation is carried out through a digital-analog hybrid real-time simulation interface of the hybrid simulation model. The problems that under different application scenes, the multi-voltage-level direct-current power distribution network is various in topological structure types, large in power disturbance after the operation mode is changed, fast in upgrading and updating of key core equipment, poor in flexibility and accuracy in simulation and the like are solved.
Description
Technical Field
The invention belongs to the technical field of digital simulation, and particularly relates to a digital-analog hybrid simulation method and system for a direct-current power distribution network.
Background
With the large-scale application of the renewable energy grid-connected technology, the existing alternating-current power distribution network is facing to the huge challenges in multiple aspects such as the large-scale access of distributed power generation, the customization of power consumption requirements, the complexity of power flow coordination control and the like, and the traditional alternating-current power distribution network gradually shows the defects in the aspects of new energy accepting capacity, electric energy quality improvement and the like.
The direct-current power distribution network has the advantages of flexibility and high efficiency, the problems of reactive circulation, stable power angle and the like do not exist, the capacity of the power distribution network for receiving new energy, distributed power sources and diversified loads can be improved, the grid structure of the power distribution network is optimized, and the power supply reliability level is improved. Therefore, it is a new trend to structurally change the connection and power supply modes of the power distribution network. In the last 90 th century, the ABB company introduced the HVDC-light direct current transmission technology, opened up a new era of direct current transmission, successfully applied to offshore wind power grid connection, and then popularized and applied to the direct current distribution network in modern cities, which is regarded as the development trend of the urban distribution network in the future.
The method aims at voltage stabilization control, flexible power regulation and networking coordinated operation in a direct-current power distribution network, so that the simulation and verification of the performance of each aspect of a modular high-frequency chain direct-current transformer are essential key links in the development of the high-frequency chain direct-current transformer based on a virtual direct-current motor technology and the construction of the direct-current power distribution network based on the virtual direct-current motor technology, wherein the simulation and verification of the efficiency, reliability, response speed and power regulation capacity of the device are included. On the basis, the problems are found, so that the parameters of key components of the direct-current transformer are optimized, the control method is improved, and the comprehensive performance of the transformer is improved. And under different application scenes, the multi-voltage-level direct-current power distribution network has various topological structures, large power disturbance after the operation mode is changed, and quick upgrading and updating of key core equipment, so that the problems of lack of flexibility and accuracy in simulation and the like are caused.
Disclosure of Invention
In order to overcome the defects of the prior art, it is urgently needed to design a comprehensive simulation verification means capable of performing flexible topology change, and fully combine the scale advantage of the real-time digital simulation of the direct-current power distribution network and the full-state characteristics of the physical simulation, the invention provides a digital-analog hybrid simulation method for the direct-current power distribution network, which is characterized by comprising the following steps of:
acquiring a direct current distribution network topological structure, and identifying components which are easy to perform real-time digital simulation in the direct current distribution network topological structure and components which are easy to perform physical simulation in the direct current distribution network topological structure in the topological structure;
inputting component data which is easy to carry out real-time digital simulation into a real-time digital simulation model part of a pre-constructed digital-analog hybrid simulation model of the direct-current power distribution network;
inputting component data which is easy to carry out physical simulation into a physical simulation model part of a pre-constructed direct-current power distribution network digital-analog hybrid simulation model;
and performing hybrid simulation based on the real-time digital simulation part and the physical simulation part through a digital-analog hybrid real-time simulation interface of a pre-constructed digital-analog hybrid simulation model of the direct-current power distribution network.
Preferably, the real-time digital simulation model part of the digital-analog hybrid simulation model of the direct-current distribution network includes:
simulating a direct-current transformer of the direct-current power distribution network by using a direct-current transformer simulator;
utilizing a protection system simulator for simulating the control protection system of the direct-current transformer;
utilizing an alternating current system simulator for simulating an alternating current system associated with the direct current transformer control protection system;
and connecting the direct current transformer simulator, the protection system simulator and the alternating current system simulator by adopting a topological structure of the direct current distribution network.
Preferably, the constructing of the physical simulation model part includes:
a simulator is constructed for components which are easy to carry out physical simulation based on a similar theory.
Preferably, the component construction simulator for facilitating real-time physical simulation based on the similarity theory includes:
simulating the analog AC/DC converter by using an AC/DC converter simulator;
simulating the analog DC/DC converter by using a DC/DC converter simulator;
simulating the analog DC/AC converter by using a DC/AC converter simulator;
simulating the analog direct current load by using a direct current load simulator;
and connecting the direct current AC/DC converter simulator, the DC/AC converter simulator and the direct current load simulator by adopting a topological structure of the direct current distribution network.
Preferably, the performing mixed simulation based on the real-time digital simulation part and the physical simulation part through a digital-analog mixed real-time simulation interface of a pre-constructed digital-analog mixed simulation model of the direct-current power distribution network includes:
when real-time digital simulation is carried out, port current or voltage of a simulated branch circuit or circuit part is obtained based on boundary conditions of a real-time digital simulation model part; replacing the corresponding simulator in the real-time digital-analog simulation model part, and completing the conversion of digital quantity and physical quantity by a technology of converting D/A into an interface; then carrying out a simulation experiment;
when physical simulation is carried out, port current or voltage of a simulated branch circuit or circuit part is obtained based on boundary conditions of a physical simulation model part; replacing the corresponding simulator in the physical simulation model part, and completing the conversion of physical quantity and digital quantity by the technology of A/D conversion into an interface; and simulating the simulated branch or circuit.
Based on the same inventive concept, the invention also provides a digital-analog hybrid simulation system of the direct-current power distribution network, and the improvement is that the digital-analog hybrid simulation system comprises:
the device comprises a component identification module, a real-time digital simulation model, a physical simulation model and a simulation interface;
the component identification module is used for acquiring a direct current distribution network topological structure, and identifying components which are easy to perform real-time digital simulation in the direct current distribution network topological structure and components which are easy to perform physical simulation in the direct current distribution network topological structure in the topological structure;
the real-time digital simulation receiving is used for receiving component data which is easy to perform real-time digital simulation and performing simulation;
the physical simulation model is used for receiving component data which is easy to perform physical simulation for simulation;
and the simulation interface is used for combining the real-time digital simulation part and the physical simulation part to carry out hybrid simulation.
Preferably, the real-time digital simulation model comprises:
the direct current transformer simulator is used for simulating the direct current transformer;
the direct-current transformer control protection system simulator is used for simulating the direct-current transformer control protection system;
and the alternating current system simulator is used for simulating an alternating current system related to the direct current transformer control protection system.
Preferably, the physical simulation model is specifically configured to: a simulator is constructed for components which are easy to carry out physical simulation based on a similar theory.
Preferably, the real-time digital simulation module is configured to, when performing real-time digital simulation, obtain a port current or a port voltage of a simulated branch or circuit part based on a boundary condition of the real-time digital simulation model part; and replacing the corresponding simulator based on the real-time digital analog simulation model part, and completing the conversion of digital quantity and physical quantity by a technology of converting D/A into an interface.
Preferably, the physical simulation module is configured to, when performing physical simulation, obtain a port current or voltage of the simulated branch or circuit part based on a boundary condition of the physical simulation model part; and performing substitution based on a corresponding simulator in the physical simulation model part, and completing the conversion of the physical quantity and the digital quantity through the technology of A/D conversion into an interface.
Compared with the prior art, the invention has the beneficial effects that:
the invention provides a digital-analog hybrid simulation method and a digital-analog hybrid simulation system for a direct-current power distribution network, which comprise the following steps: acquiring a direct current distribution network topological structure, and identifying components which are easy to perform real-time digital simulation in the direct current distribution network topological structure and components which are easy to perform physical simulation in the direct current distribution network topological structure in the topological structure; inputting component data which is easy to carry out real-time digital simulation into a real-time digital simulation model part of a pre-constructed digital-analog hybrid simulation model of the direct-current power distribution network; inputting component data which is easy to carry out physical simulation into a physical simulation model part of a pre-constructed direct-current power distribution network digital-analog hybrid simulation model; and performing mixed simulation through a digital-analog mixed real-time simulation interface of a pre-constructed digital-analog mixed simulation model of the direct-current power distribution network based on the real-time digital simulation part and the physical analog simulation part. The problems that under different application scenes, the multi-voltage-level direct-current power distribution network is various in topological structure types, large in power disturbance after the operation mode is changed, fast in upgrading and updating of key core equipment, poor in flexibility and accuracy in simulation and the like are solved.
The digital-analog hybrid simulation method and the digital-analog hybrid simulation system for the direct-current power distribution network can carry out flexible step reconstruction based on real-time digital simulation and physical analog simulation, meet the precision under the requirement of variable step size simulation, realize unified data coordination and consistent synchronization of time scales, and obtain outstanding progress and substantial contribution in the aspects of accepting new energy capacity, improving electric energy quality and the like.
Drawings
Fig. 1 is a schematic structural diagram of a digital-analog hybrid simulation system of a direct-current power distribution network;
FIG. 2 is a schematic diagram of a digital-analog hybrid real-time simulation system;
FIG. 3 is a schematic diagram of a digital-analog hybrid simulation method of the DC power distribution network;
fig. 4 a dc distribution network minimum topology system;
fig. 5 is a schematic diagram of a basic structure of a digital-analog hybrid simulation system of a dc power distribution network according to the present invention;
fig. 6 is a detailed structural schematic diagram of a digital-analog hybrid simulation system of a dc power distribution network according to the present invention.
Detailed Description
Example 1:
the invention provides a digital-analog hybrid simulation method for a direct-current power distribution network, which is used for researching a unified coordination control strategy and a simulation scheme under a direct-current power distribution network multi-converter based on a multi-voltage-class, multi-channel and multi-device digital-analog signal in-loop control technology. In addition, the physical device for simulating the simulation of the technical method simulates the behavior of a real system, and the relation between the simulated system and the simulation system must satisfy a similar theory, wherein the similar theory is to ensure that the operation characteristics of a model and a prototype are similar and the output result is similar in the model building research.
In the hybrid simulation system, the simulation part comprises prototype simulation simulators of direct current AC/DC converters, DC/AC converters, direct current loads and the like (comprising fast thyristor and IGBT devices, converter transformers, direct current reactors and the like). The digital part comprises other AC/DC converters, other DC/DC converters and DC transformers and their control and protection systems and associated AC system parts (detailed generator model, transmission line model, transformer model and load model, etc.).
The tested actual control and protection system is connected with the generator set or the prototype simulation simulator for real-time testing. The real-time digital simulation system and the analog simulator (comprising the generator set and the prototype power electronic device) are respectively used as two subsystems, and the two subsystems are combined through a digital-analog mixed real-time interface to carry out real-time simulation, so that the range of real-time simulation research is expanded. Therefore, if a unified boundary condition can be formed for two simulation subsystems, and the conversion of physical quantity and digital quantity is completed by the technology of converting A/D and D/A into the interface of the core, then a real system can be simulated by combining the physical method and the numerical method.
The technology of the digital-analog hybrid real-time simulation interface is based on the substitution theorem that if a branch or a part of a circuit is taken out of the circuit in the form of a single-port network, and the port current of the branch or the part is known at the same time, the taken-out part can be replaced by a corresponding current source and the state of the rest part of the circuit is not changed; if a branch or a part of a circuit is taken out of the circuit in the form of a single-port network, and at the same time its port voltage is known, the taken-out part can be replaced by a corresponding voltage source without changing the state of the rest of the circuit. Thus, the boundary conditions of the simulation subsystem can be replaced by a dynamically refreshed current or voltage source with only the port current or voltage known. In fact, the node voltage is directly present in the digital simulation. In each step, the voltage and current values calculated by digital simulation are kept unchanged until the next step is long. Based on the principle and the scheme, the digital-analog signal in-loop control technology of the direct-current power distribution network based on multiple voltage grades, multiple channels and multiple devices is researched. A unified coordination control strategy and a simulation scheme under a direct-current power distribution network multi-converter based on digital-analog hybrid simulation are researched.
The digital-analog hybrid simulation adopts a digital simulation model and a physical model based on a similar theory. In digital-analog hybrid simulation, a simulation method is usually adopted to simulate rotating elements such as motors by using a digital simulation method based on a microprocessor or a DSP chip, and the like, so that a physical model based on a similar theory is still adopted to simulate power system elements which are difficult to obtain a digital simulation model or easy to adopt a physical model. As shown in the schematic diagram of fig. 1.
Because a large number of distributed power sources and the like are connected to a direct-current power distribution network, the number of power electronic devices in the power distribution network is increased, and in a control and protection system of the power electronic devices, when the transient characteristic of high frequency is considered, the physical simulator is more suitable to be applied at the moment because the real-time digital simulation system cannot adopt the step length less than 10 microseconds. In a test of a power generation device of an actual power electronic device, it is sometimes desirable to perform an experiment using an actual device, and the rest of the system is simulated by digital simulation. Physical simulation and digital simulation have respective advantages, and the physical simulation and the digital simulation are combined to form a digital-analog hybrid real-time simulation system, so that the advantages can be made up for the disadvantages, the complementary advantages can be realized, and the simulation process of the direct-current power distribution system can be optimized. According to the idea of the method, a digital-analog hybrid simulation method schematic diagram of the direct-current power distribution network shown in fig. 3 is established on the basis of fig. 2. Based on the schematic diagram of the digital-analog hybrid simulation method of the direct-current distribution network shown in fig. 3, the verification of the energy balance control strategy of the direct-current distribution network is realized through the modes of parameter setting, topology change, load adjustment and the like; the method is used for verifying energy balance control strategies among different converters under the conditions of no load, light load, medium load, heavy load and overload, and verifying the various converters, nonlinear coordination control strategies among multiple converters and multi-objective optimization strategies. And improving the verification scheme and the control strategy at the same time of verification.
The following describes embodiments of the present invention in further detail with reference to the accompanying drawings.
The invention relates to a digital-analog hybrid simulation method for a direct-current power distribution network. The real-time digital simulation system and the physical simulation simulator are respectively used as two subsystems. And combining the two subsystems through a digital-analog hybrid real-time interface to perform real-time simulation. The specific implementation steps are as follows:
the first step is as follows: and establishing a real-time digital simulation model part of the direct-current power distribution network, wherein the establishment process requires identifying components which are easy to perform real-time digital simulation in the topological structure of the direct-current power distribution network. Such as a dc transformer and its control and protection system and associated ac system parts (detailed generator model, transmission line model, transformer model, load model, etc.).
The second step is that: and establishing a physical simulation model part of the direct-current power distribution network, wherein components which are easy to perform physical simulation in the topological structure of the direct-current power distribution network are required to be identified in the establishing process. For example, direct current AC/DC converters, DC/AC converters, direct current loads, etc. (including fast thyristor and IGBT devices, converter transformers, direct current reactors, etc.).
The third step: and building a digital-analog hybrid real-time simulation interface part for data coordination unification and time scale consistent synchronization. The technology of the digital-analog hybrid real-time simulation interface is based on the substitution theorem, namely if a branch or a certain part of a circuit is taken out of the circuit in the form of a single-port network, and the port current of the branch or the part is known at the same time, the taken-out part can be replaced by a corresponding current source and the state of the rest part of the circuit is not changed; if a branch or a part of a circuit is taken out of the circuit in the form of a single-port network, and at the same time its port voltage is known, the taken-out part can be replaced by a corresponding voltage source without changing the state of the rest of the circuit. Thus, the boundary conditions of the simulation subsystem can be replaced by a dynamically refreshed current or voltage source with only the port current or voltage known. And the conversion of physical quantity and digital quantity is completed by the technology of A/D and D/A conversion into interface of core, and the digital part and analog part can be coordinated at the boundary based on the above principle.
The fourth step: inputting component data which is easy to carry out real-time digital simulation into a real-time digital simulation model part of a pre-constructed digital-analog hybrid simulation model of the direct-current power distribution network; inputting component data which is easy to carry out physical simulation into a physical simulation model part of a pre-constructed direct-current power distribution network digital-analog hybrid simulation model; and performing mixed simulation through a digital-analog mixed real-time simulation interface of a pre-constructed digital-analog mixed simulation model of the direct-current power distribution network based on the real-time digital simulation part and the physical analog simulation part.
The digital-analog hybrid simulation adopts a digital simulation model and a physical model based on a similar theory. In digital-analog hybrid simulation, a simulation method is usually adopted to simulate rotating elements such as motors by using a digital simulation method based on a microprocessor or a DSP chip, and the like, so that a physical model based on a similar theory is still adopted to simulate power system elements which are difficult to obtain a digital simulation model or easy to adopt a physical model. As shown in the schematic diagram of fig. 1. In fig. 1, AC (alternating current): an alternating current. DC (direct current): direct current.
Because a large number of distributed power sources and the like are connected to a direct-current power distribution network, the number of power electronic devices in the power distribution network is increased, and in a control and protection system of the power electronic devices, when the transient characteristic of high frequency is considered, a physical simulator is adopted because a real-time digital simulation system cannot avoid step length limitation. In a test of a power generation device of an actual power electronic device, it is sometimes desirable to perform an experiment using an actual device, and to perform simulation using digital simulation in other parts of the system. Physical simulation and digital simulation have respective advantages, and the physical simulation and the digital simulation are combined to form a digital-analog hybrid real-time simulation system, so that the advantages can be made up for the disadvantages, the complementary advantages can be realized, and the simulation process of the direct-current power distribution system can be optimized.
According to the idea of the method, a digital-analog hybrid simulation method schematic diagram of the direct-current power distribution network shown in fig. 3 is established on the basis of fig. 2. In fig. 2, PV: photovoltaic power generation; l1, L2 … Lm and L3, L4 … Ln: each inductor; DCSST (direct current solid state transducer): a direct current solid state transformer; VSC (voltage source converter): a voltage source type converter;
based on the schematic diagram of the digital-analog hybrid simulation method of the direct-current power distribution network shown in fig. 3, the Medium Voltage Alternating Current (MVAC) is a Medium voltage alternating current; medium Voltage Direct Current (MVDC); LVAC (Low voltage alternating current) Low voltage alternating current; LVDC (Low voltage direct current) Low voltage direct current; PWM (Pulse Width Modulation): the generation module is a pulse width modulation control technology and is used for generating pwm waves;
the verification of the energy balance control strategy of the direct current distribution network is realized through the modes of parameter setting, topology change, load adjustment and the like; the method is used for verifying energy balance control strategies among different converters under the conditions of no load, light load, medium load, heavy load and overload, and verifying the various converters, nonlinear coordination control strategies among multiple converters and multi-objective optimization strategies. And improving the verification scheme and the control strategy at the same time of verification.
The experimental test and the comprehensive performance evaluation are the basis for the direct current distribution network to be used in engineering practice. The scheme of the direct current distribution network provided by the embodiment is mainly built by transforming the prototype. The power is preliminarily designed to be 10kW, the three-phase voltage on the network side is 380V, the voltage of a direct-current bus of a distribution network is 750V, three VSC converters adopt a 3L-ATNPC three-level topology, three bidirectional DC/DC direct-current converters are connected in parallel and are respectively connected with a photovoltaic simulator, a storage battery pack and a direct-current electronic load. In addition, circuit breakers are respectively added on the direct current side and the alternating current side of the system to simulate different operation modes.
And (3) reconstructing the existing multi-end flexible direct current system test platform in a laboratory by combining the theoretical research, and constructing the minimum topology system of the direct current distribution network shown in the figure 4. And carrying out experimental simulation verification on research contents such as 'virtual direct current motor' characteristics of a direct current distribution network, an energy conversion mechanism, nonlinear system control and the like. On the basis, the existing problems can be found, the system structure and the control strategy are further improved, and the comprehensive performance is improved. Experimental simulation results show that the invention provides a comprehensive simulation system capable of flexibly changing topology.
Example 2:
based on the same invention concept, the invention also provides a digital-analog hybrid simulation system of the direct-current power distribution network.
A digital-analog hybrid simulation system for a dc distribution network, the basic structure of which is shown in fig. 5, includes: the device comprises a component identification module, a real-time digital simulation model, a physical simulation model and a simulation interface;
the component identification module is used for acquiring a direct current distribution network topological structure, and identifying components which are easy to perform real-time digital simulation in the direct current distribution network topological structure and components which are easy to perform physical simulation in the direct current distribution network topological structure in the topological structure;
the real-time digital simulation model is used for receiving component data which is easy to carry out real-time digital simulation and carrying out simulation;
the physical simulation model is used for receiving component data which is easy to perform physical simulation for simulation;
and the simulation interface is used for combining the real-time digital simulation part and the physical simulation part to carry out hybrid simulation.
A detailed structure of a digital-analog hybrid simulation system of a dc distribution network is shown in fig. 6.
Preferably, the real-time digital simulation model comprises:
the direct current transformer simulator is used for simulating the direct current transformer;
the direct-current transformer control protection system simulator is used for simulating the direct-current transformer control protection system;
and the alternating current system simulator is used for simulating an alternating current system related to the direct current transformer control protection system.
Preferably, the physical simulation model is specifically configured to: a simulator is constructed for components which are easy to carry out physical simulation based on a similar theory.
Preferably, the simulation interface is used for connecting the real-time digital simulation model and the physical simulation model.
Preferably, the real-time digital simulation module is configured to, when performing real-time digital simulation, obtain a port current or a port voltage of a simulated branch or circuit part based on a boundary condition of the real-time digital simulation model part; and replacing the corresponding simulator based on the real-time digital analog simulation model part, and completing the conversion of digital quantity and physical quantity by a technology of converting D/A into an interface.
Preferably, the physical simulation module is configured to, when performing physical simulation, obtain a port current or voltage of the simulated branch or circuit part based on a boundary condition of the physical simulation model part; and performing substitution based on a corresponding simulator in the physical simulation model part, and completing the conversion of the physical quantity and the digital quantity through the technology of A/D conversion into an interface.
Finally, it should be noted that: the above embodiments are only for illustrating the technical solutions of the present invention and not for limiting the same, and although the present invention is described in detail with reference to the above embodiments, those of ordinary skill in the art should understand that: modifications and equivalents may be made to the embodiments of the invention without departing from the spirit and scope of the invention, which is to be covered by the claims.
Claims (11)
1. A digital-analog hybrid simulation method for a direct-current power distribution network is characterized by comprising the following steps:
acquiring a direct current distribution network topological structure, and identifying components which are easy to perform real-time digital simulation in the direct current distribution network topological structure and components which are easy to perform physical simulation in the direct current distribution network topological structure in the topological structure;
inputting component data which is easy to carry out real-time digital simulation into a real-time digital simulation model part of a pre-constructed digital-analog hybrid simulation model of the direct-current power distribution network;
inputting component data which is easy to carry out physical simulation into a physical simulation model part of a pre-constructed direct-current power distribution network digital-analog hybrid simulation model;
and performing mixed simulation through a digital-analog mixed real-time simulation interface of a pre-constructed digital-analog mixed simulation model of the direct-current power distribution network based on the real-time digital simulation part and the physical analog simulation part.
2. The method of claim 1, wherein the real-time digital simulation model part of the digital-analog hybrid simulation model of the direct current distribution network comprises:
simulating a direct-current transformer of the direct-current power distribution network by using a direct-current transformer simulator;
simulating the control protection system of the direct-current transformer by using a protection system simulator;
simulating an alternating current system related to the direct current transformer control protection system by using an alternating current system simulator;
and connecting the direct current transformer simulator, the protection system simulator and the alternating current system simulator through a topological structure of the direct current distribution network.
3. The simulation method of claim 1, wherein the constructing of the physical simulation model portion comprises:
a simulator is constructed for components which are easy to carry out physical simulation based on a similar theory.
4. The simulation method according to claim 3, wherein the building of the simulator for the components which are easy to perform real-time physical simulation based on the similarity theory comprises:
simulating the analog AC/DC converter by using an AC/DC converter simulator;
simulating the analog DC/DC converter by using a DC/DC converter simulator;
simulating the analog DC/AC converter by using a DC/AC converter simulator;
simulating the analog direct current load by using a direct current load simulator;
and connecting the direct current AC/DC converter simulator, the DC/AC converter simulator and the direct current load simulator by adopting a topological structure of the direct current distribution network.
5. The simulation method of claim 1, wherein the hybrid simulation based on the real-time digital simulation part and the physical simulation part is performed through a digital-analog hybrid real-time simulation interface of a pre-constructed digital-analog hybrid simulation model of the direct-current distribution network, and the method comprises the following steps:
when real-time digital simulation is carried out, port current or voltage of a simulated branch circuit or circuit part is obtained based on boundary conditions of a real-time digital simulation model part; replacing the corresponding simulator in the real-time digital-analog simulation model part, and completing the conversion of digital quantity and physical quantity by a technology of converting D/A into an interface; then carrying out a simulation experiment;
when physical simulation is carried out, port current or voltage of a simulated branch circuit or circuit part is obtained based on boundary conditions of a physical simulation model part; replacing the corresponding simulator in the physical simulation model part, and completing the conversion of physical quantity and digital quantity by the technology of A/D conversion into an interface; then, a simulation experiment was performed.
6. The utility model provides a direct current distribution network digifax hybrid simulation system which characterized in that includes: the device comprises a component identification module, a real-time digital simulation model, a physical simulation model and a simulation interface;
the component identification module is used for acquiring a direct current distribution network topological structure, and identifying components which are easy to perform real-time digital simulation in the direct current distribution network topological structure and components which are easy to perform physical simulation in the direct current distribution network topological structure in the topological structure;
the real-time digital simulation model is used for receiving component data which is easy to carry out real-time digital simulation and carrying out simulation;
the physical simulation model is used for receiving component data which is easy to perform physical simulation for simulation;
and the simulation interface is used for combining the real-time digital simulation part and the physical simulation part to carry out hybrid simulation.
7. The simulation system of claim 6, wherein the real-time digital simulation model comprises:
the direct current transformer simulator is used for simulating the direct current transformer;
the direct-current transformer control protection system simulator is used for simulating the direct-current transformer control protection system;
and the alternating current system simulator is used for simulating an alternating current system related to the direct current transformer control protection system.
8. The simulation system of claim 6, wherein the physical simulation model is specifically configured to: a simulator is constructed for components which are easy to carry out physical simulation based on a similar theory.
9. The simulation system of claim 6, wherein the simulation interface is configured to interface a real-time digital simulation model and a physical simulation model.
10. The simulation system of claim 6, wherein the real-time digital simulation module is configured to obtain a port current or voltage of the simulated branch or circuit portion based on boundary conditions of the real-time digital analog simulation model portion when performing real-time digital simulation; and replacing the corresponding simulator based on the real-time digital analog simulation model part, and completing the conversion of digital quantity and physical quantity by a technology of converting D/A into an interface.
11. The simulation system of claim 6, wherein the physical simulation module is configured to obtain a port current or voltage of the simulated branch or circuit portion based on boundary conditions of the physical simulation model portion when performing the physical simulation; and performing substitution based on a corresponding simulator in the physical simulation model part, and completing the conversion of the physical quantity and the digital quantity through the technology of A/D conversion into an interface.
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113807041A (en) * | 2021-10-20 | 2021-12-17 | 中国科学院微电子研究所 | Circuit system simulation method and device, electronic equipment and storage medium |
| CN116070530A (en) * | 2023-03-07 | 2023-05-05 | 国网天津市电力公司城西供电分公司 | Power grid modeling real-time simulation method and device based on data driving |
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2019
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113807041A (en) * | 2021-10-20 | 2021-12-17 | 中国科学院微电子研究所 | Circuit system simulation method and device, electronic equipment and storage medium |
| CN116070530A (en) * | 2023-03-07 | 2023-05-05 | 国网天津市电力公司城西供电分公司 | Power grid modeling real-time simulation method and device based on data driving |
| CN116070530B (en) * | 2023-03-07 | 2023-06-27 | 国网天津市电力公司城西供电分公司 | Power grid modeling real-time simulation method and device based on data driving |
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