CN109754680B - Micro-grid semi-physical simulation system and method based on dSPACE - Google Patents
Micro-grid semi-physical simulation system and method based on dSPACE Download PDFInfo
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Abstract
The invention relates to a microgrid semi-physical simulation system based on dSPACE, which comprises a hardware circuit physical system, an equipment control subsystem comprises a dSPACE simulation control system and a data information processing system, wherein the equipment control subsystem receives a system control instruction of a microgrid monitoring system, controls each equipment in the hardware circuit physical system and transmits data to the microgrid monitoring system; the micro-grid monitoring system is a central controller of a dSPACE-based micro-grid semi-physical simulation system, analyzes energy exchange requirements of the micro-grid system and a public power grid according to data uploaded by the equipment control subsystem, obtains a micro-grid system control instruction, and issues the micro-grid system control instruction to the equipment control subsystem. The semi-physical simulation system has clear functions and stable performance of each part, and can quickly develop and verify the control strategy of the converter and the micro-grid through model modification, accelerate the progress of technical research and better complete the theoretical research of the converter and the micro-grid.
Description
Technical Field
The invention belongs to the field of semi-physical system simulation, and particularly relates to a micro-grid semi-physical simulation system and method based on dSPACE.
Technical Field
With the development of distributed power generation technology, a microgrid as a power network for transition from a traditional power grid to a smart power grid gradually becomes a focus of attention of people, and the distributed power generation technology has become a key point of research on bidirectional power flow of the microgrid system, energy exchange between the microgrid system and a public power grid, distributed energy management in the microgrid system, control algorithm research of power electronic devices in the microgrid system and the like.
On one hand, because different research purposes need different products or experiment platforms, repeated similar product development and platform construction are caused, and working contents are redundant; on the other hand, the control of the converter product and the micro-grid system is mostly realized by adopting a code compiling mode, the programming time is long, the difficulty is high, the whole research process is slow, and the pace of technical research is not facilitated.
The invention relates to a dSPACE-based microgrid semi-physical simulation system, which combines simulation equipment with semi-physical to develop the semi-physical simulation system, realizes the control of physical hardware quickly by building a control model, different models can form converter products in different forms, and according to different research purposes, the updating of algorithm strategies can be realized quickly by only modifying the control model, and the control theory is verified.
Disclosure of Invention
The invention aims to overcome the defects of repeated redundancy development and slow research progress caused by poor expandability of a technical scheme in the traditional micro-grid technical research, and provides a micro-grid semi-physical simulation system and method based on dSPACE.
In order to achieve the purpose, the invention adopts the following technical scheme:
the micro-grid semi-physical simulation system based on the dSPACE comprises a hardware circuit physical system, an equipment control subsystem and a micro-grid monitoring system.
The hardware circuit physical system comprises a converter, a distributed power supply, an intelligent switch and an intelligent sensor, and executes instructions of the equipment control subsystem and transmits field data to the equipment control subsystem.
The equipment control subsystem comprises a dSPACE simulation control system and a data information processing system, receives a system control instruction of the microgrid monitoring system, obtains an instruction of equipment in the hardware circuit real object system through analysis and processing, controls the equipment to operate, and forwards field data to the microgrid monitoring system.
The micro-grid monitoring system is a central controller of a dSPACE-based micro-grid semi-physical simulation system, analyzes energy exchange requirements of the micro-grid system and a public power grid according to data uploaded by the equipment control subsystem and a control target to obtain a micro-grid system control instruction, and sends the micro-grid system control instruction to the equipment control subsystem.
The converter in the hardware circuit real object system comprises a universal DC/AC converter (branch 1), a photovoltaic DC/AC converter (branch 2), an energy storage DC/AC converter (branch 3), an energy storage DC/DC converter (branch 4) and a wind power DC/AC converter (branch 5), and the converter mainly realizes the function of electric energy conversion.
The intelligent switches in the hardware circuit physical system are controlled by the equipment control subsystem, and each intelligent switch selects whether each branch participates in the operation of the microgrid system through switching on or switching off, so that different microgrid circuit topologies are constructed and the microgrid topology research is carried out.
The intelligent sensor in the hardware circuit physical system collects the operation data of each branch circuit, feeds back information to the equipment control subsystem and participates in system control.
The dSPACE simulation control system in the equipment control subsystem comprises a model development host, dSPACE and a signal switching device. The method comprises the steps of building a control model of the converter in a model development host, wherein the control model comprises a constant-voltage double-closed-loop control model of a universal DC/AC converter, a photovoltaic power generation control model of a photovoltaic DC/AC converter, an energy storage control model of an energy storage DC/AC converter and an energy storage control model of an energy storage DC/DC converter and a wind power generation control model of a wind power DC/AC converter, after the building of the model is completed, the model is downloaded into dSPACE through compiling and operates, a control signal is generated and transmitted to a signal switching device, the signal switching device processes the signal into a control signal matched with a converter hardware circuit, and the converter is controlled to operate.
Each model built in the model development host adopts a modular programming method, and control functions are divided into a communication module, a storage module, an instruction module, a protection module, an input interface module, a coordinate transformation module, a closed-loop control module, a pulse generation module, an output interface module and a logic control module. The communication module is an interface for external communication of dSPACE and is used for communication between the dSPACE and the micro-grid monitoring system; the storage module is used for storing instructions of the micro-grid monitoring system and converter operation data; the instruction module is used for analyzing an instruction of the micro-grid monitoring system and analyzing an instruction value corresponding to each converter by combining the converter operation data; the protection module is responsible for fault detection and processing of the converter, and safe and stable operation of the converter is guaranteed; the input interface module and the output interface module are interfaces for exchanging information between dSPACE and the signal switching device; the coordinate transformation module is used for carrying out coordinate transformation or formula transformation on the controlled quantity of the transformer; the closed-loop control module realizes closed-loop control on the controlled quantity; the pulse generation module generates control pulses of the converter according to a pulse width modulation algorithm; and the logic control module sets the running state and the switching state of the converter according to the information fed back by the converter, so that the converter runs orderly.
The data information processing system in the equipment control subsystem mainly refers to a data acquisition processor. The data information processing system receives the instruction of the micro-grid monitoring system, analyzes the data uploaded by the intelligent sensor, controls the on/off of the intelligent switch, realizes the adjustment of the micro-grid circuit topology, and forms different circuit topology structures and system operation modes.
The micro-grid monitoring system comprises a monitoring interface and a background operation strategy; the monitoring interface comprises four parts of operation data, a power curve, system parameter setting and scheduling instruction setting. The operation data mainly display key parameters of each branch of the microgrid system, including data such as voltage, current, power and electric quantity; the power curves depict the "power-time" curves for each branch; the system parameter setting is used for setting key parameters of the micro-grid system and each device, including information such as an operation mode and fault resetting; and the dispatching instruction sets the interactive power of the micro-grid system and the public power grid. And the background operation strategy operates an energy scheduling and management algorithm of the micro-grid system, and calculates an instruction issued by the micro-grid system to the equipment control subsystem according to a set system control target.
Drawings
FIG. 1: electrical connection diagram of microgrid semi-physical simulation system based on dSPACE
FIG. 2: dSPACE-based microgrid semi-physical simulation system control system connection diagram
FIG. 3: and (3) a simulation model block diagram of the microgrid semi-physical simulation system based on the dSPACE.
Detailed Description
In order to illustrate the invention more clearly, the invention is further described below with reference to the accompanying drawings. It is to be understood by persons skilled in the art that the following detailed description is illustrative and not restrictive, and is not to be taken as limiting the scope of the invention.
As shown in FIGS. 1-3, the invention discloses a microgrid semi-physical simulation system and method based on dSPACE.
The micro-grid semi-physical simulation system based on the dSPACE comprises a hardware circuit physical system, an equipment control subsystem and a micro-grid monitoring system.
The hardware circuit real object system comprises a converter, a distributed power supply, an intelligent switch and an intelligent sensor, and belongs to bottom controlled equipment. The hardware circuit physical system executes the instruction of the equipment control subsystem and transmits the field data to the equipment control subsystem.
The equipment control subsystem comprises a dSPACE simulation control system and a data information processing system, receives a system control instruction of the microgrid monitoring system, obtains an instruction of equipment in the hardware circuit real object system through analysis and processing, controls the equipment to operate, and forwards field data to the microgrid monitoring system.
The micro-grid monitoring system is a central controller of a dSPACE-based micro-grid semi-physical simulation system, analyzes energy exchange requirements of the micro-grid system and a public power grid according to data uploaded by the equipment control subsystem and a control target to obtain a micro-grid system control instruction, and sends the micro-grid system control instruction to the equipment control subsystem.
The converter in the hardware circuit real object system comprises a universal DC/AC converter (branch 1), a photovoltaic DC/AC converter (branch 2), an energy storage DC/AC converter (branch 3), an energy storage DC/DC converter (branch 4) and a wind power DC/AC converter (branch 5), and the converter mainly realizes the function of electric energy conversion. The energy storage DC/DC converter and the wind power DC/AC converter share a DC bus, the general DC/AC converter, the photovoltaic DC/AC converter and the energy storage DC/AC converter share an AC bus, and the DC bus and the AC bus can exchange energy through the general DC/AC converter. The converter exchanges information with the dSPACE emulation control system via signal link 1 #.
The intelligent switches in the hardware circuit physical system are controlled by the equipment control subsystem, and each intelligent switch selects whether each branch participates in the operation of the microgrid system through switching on or switching off, so that different microgrid circuit topologies are constructed and the microgrid topology research is carried out.
The intelligent sensor in the hardware circuit physical system collects the operation data of each branch circuit, feeds back information to the equipment control subsystem and participates in system control.
The intelligent switch and the intelligent sensor exchange information with the data information processing system through a signal link 2 #.
The dSPACE simulation control system in the equipment control subsystem comprises a model development host, dSPACE and a signal switching device. The method comprises the steps of building a control model of the converter in a model development host, wherein the control model comprises a constant-voltage double-closed-loop control model of a universal DC/AC converter, a photovoltaic power generation control model of a photovoltaic DC/AC converter, an energy storage control model of an energy storage DC/AC converter and an energy storage control model of an energy storage DC/DC converter and a wind power generation control model of a wind power DC/AC converter, after the building of the model is completed, the model is downloaded into dSPACE through compiling and operates, a control signal is generated and transmitted to a signal switching device, the signal switching device processes the signal into a control signal matched with a converter hardware circuit, and the converter is controlled to operate.
Each model built in the model development host adopts a modular programming method, and control functions are divided into a communication module, a storage module, an instruction module, a protection module, an input interface module, a coordinate transformation module, a closed-loop control module, a pulse generation module, an output interface module and a logic control module. The communication module is an interface for external communication of the dSPACE, adopts an MODBUS protocol and is used for communication of the dSPACE and the micro-grid monitoring system; the storage module is used for storing instructions of the micro-grid monitoring system and converter operation data; the instruction module is used for analyzing an instruction of the micro-grid monitoring system and analyzing an instruction value corresponding to each converter by combining the converter operation data; the protection module is responsible for fault detection and processing of the converter, and safe and stable operation of the converter is guaranteed; the input interface module and the output interface module are interfaces for exchanging information between the dSPACE and the signal switching device, and the dSPACE and the signal switching device can normally process the signal data through level conversion, signal transformation ratio conversion and other processing; the coordinate transformation module is used for carrying out coordinate transformation or formula transformation on the controlled quantity of the transformer; the closed-loop control module realizes closed-loop control on the controlled quantity, including constant-voltage double closed-loop control, current single closed-loop control and the like; the pulse generation module generates a control pulse of the converter according to a pulse width modulation algorithm and drives the converter to operate; and the logic control module sets the running state and the switching state of the converter according to the information fed back by the converter, so that the converter runs orderly.
The data information processing system in the equipment control subsystem mainly refers to a data acquisition processor. The data information processing system receives the instruction of the micro-grid monitoring system, analyzes the data uploaded by the intelligent sensor, controls the on/off of the intelligent switch, realizes the adjustment of the micro-grid circuit topology, and forms different circuit topology structures and system operation modes.
The micro-grid monitoring system comprises a monitoring interface and a background operation strategy; the monitoring interface comprises four parts of operation data, a power curve, system parameter setting and scheduling instruction setting. The operation data mainly display key parameters of each branch of the microgrid system, including data such as voltage, current, power and electric quantity; the power curves depict the "power-time" curves for each branch; the system parameter setting is used for setting key parameters of the micro-grid system and each device, including information such as an operation mode and fault resetting; and the dispatching instruction sets the interactive power of the micro-grid system and the public power grid. And the background operation strategy operates an energy scheduling and management algorithm of the micro-grid system, and calculates an instruction issued by the micro-grid system to the equipment control subsystem according to a set system control target.
It is noted that, herein, relational terms such as first and second, and the like may be used solely to distinguish one entity or action from another entity or action without necessarily requiring or implying any actual such relationship or order between such entities or actions. Also, the terms "comprises," "comprising," or any other variation thereof, are intended to cover a non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements does not include only those elements but may include other elements not expressly listed or inherent to such process, method, article, or apparatus.
Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that changes, modifications, substitutions and alterations can be made in these embodiments without departing from the principles and spirit of the invention, the scope of which is defined in the appended claims and their equivalents.
Claims (4)
1. The microgrid semi-physical simulation system and method based on the dSPACE are characterized in that: the system comprises a hardware circuit real object system, an equipment control subsystem and a micro-grid monitoring system;
the hardware circuit real object system comprises a converter, a distributed power supply, an intelligent switch and an intelligent sensor; the hardware circuit physical system executes the instruction of the equipment control subsystem and transmits data to the equipment control subsystem;
the equipment control subsystem comprises a dSPACE simulation control system and a data information processing system; the dSPACE simulation control system comprises a model development host, a dSPACE and a signal switching device; building a control model of the converter in a model development host, wherein the control model comprises a constant-voltage double-closed-loop control model of a universal DC/AC converter, a photovoltaic power generation control model of a photovoltaic DC/AC converter, an energy storage control model of an energy storage DC/AC converter and an energy storage DC/DC converter and a wind power generation control model of a wind power DC/AC converter; the model is compiled and downloaded to dSPACE to run, a control signal is generated and transmitted to the signal switching device, and the signal switching device processes the signal into a control signal matched with a hardware circuit of the converter to control the converter to run; the equipment control subsystem receives a system control instruction of the micro-grid monitoring system, controls each equipment in the hardware circuit real object system after analysis and processing, and transmits data to the micro-grid monitoring system;
the micro-grid monitoring system is a central controller of a dSPACE-based micro-grid semi-physical simulation system, analyzes energy exchange requirements of the micro-grid system and a public power grid according to data uploaded by the equipment control subsystem, obtains a micro-grid system control instruction, and issues the micro-grid system control instruction to the equipment control subsystem.
2. The dSPACE-based microgrid semi-physical simulation system and method according to claim 1, characterized in that: each converter control model built in the model development host machine adopts a modular programming method, and control functions are divided into ten modules, including: the device comprises a communication module, a storage module, an instruction module, a protection module, an input interface module, a coordinate transformation module, a closed-loop control module, a pulse generation module, an output interface module and a logic control module.
3. The dSPACE-based microgrid semi-physical simulation system and method according to claim 1, characterized in that: a communication module in the converter control model functional module is an interface for external communication of dSPACE and is used for communication between the dSPACE and a micro-grid monitoring system; the storage module is used for storing instructions of the micro-grid monitoring system and converter operation data; the instruction module is used for analyzing an instruction of the micro-grid monitoring system and analyzing an instruction value corresponding to each converter by combining the converter operation data; the protection module is responsible for fault detection and processing of the converter, and safety operation of the converter is guaranteed; the input interface module and the output interface module are interfaces for exchanging information between dSPACE and the signal switching device; the coordinate transformation module is used for carrying out coordinate transformation or formula transformation on the controlled quantity of the transformer; the closed-loop control module realizes closed-loop control on the controlled quantity; the pulse generation module generates control pulses of the converter according to a pulse width modulation algorithm; and the logic control module sets the running state and the switching state of the converter according to the information fed back by the converter.
4. The dSPACE-based microgrid semi-physical simulation system and method according to claim 1, characterized in that: the micro-grid monitoring system comprises a monitoring interface and a background operation strategy; the monitoring interface comprises four parts of operation data, a power curve, system parameter setting and scheduling instruction setting; and the background operation strategy is used for operating an energy scheduling and management algorithm of the micro-grid system, the energy scheduling and management algorithm comprises the functions of peak clipping and valley filling, backflow prevention, power fluctuation stabilization and the like, and instructions issued by the micro-grid system to the equipment control subsystem are calculated according to a set system control target.
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